阅读说明：本技术 短裤型吸收性物品 (Pants-type absorbent article ) 是由 井上拓也 槙秀晃 大窪哲郎 清水纪子 于 2018-12-27 设计创作，主要内容包括：在该短裤型吸收性物品(1)中：吸收性主体(10)具有吸收性芯(11A)和腿部弹性构件(16)；吸收性芯(11A)被两折并且具有前侧芯部(11Af)和后侧芯部(11Ab)；腹侧腰身部(20)和背侧腰身部(30)具有腰身弹性构件(22、32)；在腿部弹性构件(16)和腰身弹性构件(22、32)伸长的伸长状态下,从吸收性主体(10)的左右方向一侧端部和腹侧腰身部(20)的下端的交点(P)到腰身开口(LH)的下端的上下方向长度(L1)大于从交点(P)到腹侧腰身部(20)的一端的左右方向长度(L2)的1.65倍；并且前侧芯部(11Af)具有至少一个压缩部(E),该压缩部(E)具有预定的左右方向长度,该压缩部(E)位于腹侧腰身部(20)的下端的下方。(In the pants-type absorbent article (1): the absorbent main body (10) has an absorbent core (11A) and leg elastic members (16); an absorbent core (11A) which is doubled and has a front core section (11Af) and a rear core section (11 Ab); the abdomen-side waist portion (20) and the back-side waist portion (30) have waist elastic members (22, 32); in an extended state in which the leg elastic members (16) and the waist elastic members (22, 32) are extended, a vertical length (L1) from an intersection point (P) of one end in the left-right direction of the absorbent main body (10) and the lower end of the abdomen-side waist portion (20) to the lower end of the waist opening (LH) is greater than 1.65 times a horizontal length (L2) from the intersection point (P) to one end of the abdomen-side waist portion (20); the front core (11Af) has at least one compressed section (E) having a predetermined length in the left-right direction, and the compressed section (E) is located below the lower end of the abdomen-side waist section (20).)

1. A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction,

the pants-type absorbent article includes:

an absorbent main body having a plurality of absorbent layers,

the absorbent main body includes:

an absorbent core, and

a leg stretching member that stretches and contracts in the vertical direction;

a ventral waist-body part;

a back-side waistline portion configured to be independent with respect to the abdomen-side waistline portion; and

a pair of leg openings are provided at the upper end of the leg,

the absorbent core is folded once and includes a front core portion on the front side and a rear core portion on the rear side,

the abdomen-side waist-body part and the back-side waist-body part each include a waist-body stretching member stretching in the left-right direction,

in an extended state in which the leg stretch members and the waist stretch members are extended,

with respect to the vertical length from the intersection between the left-right direction side end portion of the absorbent main body and the lower end of the abdomen-side waist portion to the lower end of the leg opening on the left-right direction side, an

A length in the left-right direction from the intersection point to a left-right direction side end portion of the abdomen-side waist portion,

the up-down direction length is greater than 1.65 times the left-right direction length,

the front side core portion has at least one compressed portion at a position below a lower end of the abdomen side waist portion,

the compressing portion has a predetermined length in the left-right direction.

2. A pant-type absorbent article according to claim 1,

the compression part is a continuous compression part continuous from one side to the other side in the left-right direction, and

a smaller angle of angles formed by a straight line connecting a vertically lowest portion to a vertically highest portion of an upper end of the continuous compression portion and a straight line extending in the left-right direction is less than 45 degrees.

3. A pant-type absorbent article according to claim 1 or 2,

the sum of the lengths of all the compressing portions in the left-right direction is larger than the sum of the lengths of all the compressing portions in the up-down direction.

4. A pant-type absorbent article according to any one of claims 1 to 3,

the compression portion is a straight line extending in the left-right direction.

5. A pant-type absorbent article according to any one of claims 1 to 4,

the plurality of compressing units are arranged side by side in the vertical direction.

6. A pant-type absorbent article according to any one of claims 1 to 5,

the front core includes a convex portion and a concave portion in a non-skin-side surface, and

the compression portion is a recess.

7. A pant-type absorbent article according to any one of claims 1 to 6,

the front core includes a narrow portion having a shorter length in the left-right direction than the upper portion.

8. A pant-type absorbent article according to claim 7,

the narrow portion has a narrowest portion, which is shortest in length in the left-right direction, and

the left-right direction length of the compression portion provided in the narrow portion is greater than or equal to the left-right direction length of the narrowest portion.

9. A pant-type absorbent article according to claim 7 or 8,

the front core includes the compressed portion above a lower end of the abdomen-side waist portion,

the narrow portion has a narrowest portion, which is shortest in length in the left-right direction, and

in a region of the front core portion above the narrowest portion,

a left-right direction end portion of one of the compression portions provided in the front side core portion does not reach a corresponding left-right direction end portion of the front side core portion.

10. A pant-type absorbent article according to any one of claims 1 to 9,

a plurality of the compressing parts are arranged side by side in the vertical direction, and

the vertical dimension of the space between the adjacent compressing parts is larger than that of each compressing part.

11. A pant-type absorbent article according to any one of claims 1 to 10,

the front side core comprises liquid-absorbent fibers,

the front core includes:

a high-density region in which the density of the liquid-absorbent fibers is high;

a low density region in which the density of the liquid absorbent fibers is low, the compressed portion being the high density region, and

a thickness at a center in an up-down direction of the low density region is 1.3 times to 3.0 times a thickness at a center in an up-down direction of the compression portion.

12. A pant-type absorbent article according to any one of claims 1 to 11,

the front core includes the compressed portion above a lower end of the abdomen-side waist portion.

13. A pant-type absorbent article according to any one of claims 1 to 12,

the center in the lateral direction of the compression portion is the center in the lateral direction of the absorbent main body.

14. A pant-type absorbent article according to claim 13,

the ventral waistline portion includes:

a telescopic region which is telescopic together with the waist telescopic member; and

a non-stretch region, which does not stretch,

the non-stretchable region is provided in the center of the abdomen-side waist portion in the right-left direction, and

both end portions of the compression portion in the left-right direction are respectively provided outside both end portions of the non-stretchable region in the left-right direction.

15. A pant-type absorbent article according to claim 13,

the ventral waistline portion includes:

a telescopic region which is telescopic together with the waist telescopic member; and

a non-stretch region, which does not stretch,

the non-stretchable region is provided in the center of the abdomen-side waist portion in the right-left direction, and

both end portions of the compression portion in the left-right direction are respectively provided inside both end portions of the non-stretchable region in the left-right direction.

16. A pant-type absorbent article according to any one of claims 1 to 15,

the absorbent main body includes:

a pair of leakage preventing walls each having a leakage preventing wall telescoping member;

a fixing portion which cannot stand up to the skin side; and

a standing part capable of standing toward the skin side and standing toward the skin side

The compression portion has a length in the left-right direction that is greater than or equal to a distance between ends of the leakage preventing wall on the inner side in the left-right direction.

17. A pant-type absorbent article according to any one of claims 1 to 16, wherein the plurality of compressed portions are arranged at equal intervals in the up-down direction.

18. A pant-type absorbent article according to any one of claims 1 to 16,

the front core has a plurality of the compressed parts, and

the interval between a lower side compressing portion at the lowest position and an immediately adjacent lower side compressing portion above the lower side compressing portion at the lowest position among the plurality of compressing portions is smaller than

An interval between an upper side compressed portion at a highest position and an immediately adjacent upper side compressed portion below the upper side compressed portion among a plurality of the compressed portions provided below a lower end of the abdomen-side waist portion.

19. A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction,

the pants-type absorbent article includes:

an absorbent core;

a ventral waist-body part;

a back waist portion; and

a leg stretching member that stretches in the up-down direction,

the absorbent core is folded once and includes a front core portion on the front side and a rear core portion on the rear side,

the absorbent core includes a narrow portion having a shorter length in the left-right direction than the upper portion,

the abdomen-side waist-body part and the back-side waist-body part each include a waist-body stretching member stretching in the left-right direction,

in an extended state in which the leg stretch members and the waist stretch members are extended,

the narrow portion in the front core portion has a longer length in the vertical direction than the narrow portion in the rear core portion,

the narrow portion of the front core has at least one compressed portion having a predetermined left-right direction length.

20. A pant-type absorbent article according to claim 19,

the narrow portion has a plurality of the compressed portions.

21. A pant-type absorbent article according to claim 19 or 20,

the rear core has at least one compression section,

one of the at least one compression part is provided in the front side core,

another compression portion of the at least one compression portion is provided in the rear core portion,

a left-right direction length of the one compression part is equal to a left-right direction length of the other compression part in the extended state,

in the front side core portion, each of right and left direction end portions of the one compression portion reaches a corresponding end portion of the front side core portion, and

in the rear core portion, each of right and left direction end portions of the other compression portion does not reach a corresponding end portion of the rear core portion.

22. A pant-type absorbent article according to any one of claims 19 to 21,

the narrow portion has a narrowest portion having a shortest length in the left-right direction,

the rear core portion has at least one of the compression portions, and

the left-right direction length of the compression portion in the rear core portion is greater than or equal to the left-right direction length of the narrowest portion.

23. A pant-type absorbent article according to any one of claims 19 to 22,

the sum of the lengths of all the compressing portions in the left-right direction is larger than the sum of the lengths of all the compressing portions in the up-down direction.

24. A pant-type absorbent article according to any one of claims 19 to 23,

the compression portion is a straight line extending in the left-right direction.

25. A pant-type absorbent article according to any one of claims 19 to 24,

the pant-type absorbent article further comprising an absorbent body comprising an absorbent core,

the absorbent main body includes:

a pair of leakage preventing walls each having a leakage preventing wall telescoping member;

a fixing portion which cannot stand up to the skin side; and

a standing part capable of standing toward the skin side and standing toward the skin side

The compression portion has a length in the left-right direction larger than a distance between ends of the leakage preventing wall on the inner side in the left-right direction.

26. A pant-type absorbent article according to any one of claims 19 to 25,

the front core has a plurality of the compressed parts, and

the interval between a lower side compressing portion at the lowest position and an immediately adjacent lower side compressing portion above the lower side compressing portion at the lowest position among the plurality of compressing portions is smaller than

An interval between an upper side compressed portion at a highest position and an immediately adjacent upper side compressed portion below the upper side compressed portion among a plurality of the compressed portions provided below a lower end of the abdomen-side waist portion.

Technical Field

The present invention relates to a pants-type absorbent article.

Background

Pants-type disposable diapers are generally known as an example of absorbent articles. For example, patent document 1 discloses a disposable diaper 10 having an abdominal-side waistline region 11, a back-side waistline region 12, and an absorbent structure 21. The absorbent structure 21 includes extension portions 31 extending beyond both outer sides in the width direction of the absorbent body 22. The extensions 31 are each provided with a leakage-preventing gather portion 51 and a leg gather portion 41 that is longer than the leakage-preventing gather portion 51 in the width direction. This allows the extensions 31 to fit a wide area of the wearer's legs and reduces the risk of leakage of excreta from the diaper 10. In addition, in the disposable diaper 10, in order to reduce the risk that the absorbent body 22 restricts the movement of the legs of the infant, a contracted portion having a short length in the width direction is formed in the absorbent body 22.

Disclosure of Invention

Problems to be solved by the invention

The problem to be solved by the present invention is at least one of the following first and second problems.

A first problem is that, in the disposable diaper 10 disclosed in patent document 1, the absorbent structure 21 is wide to ensure a certain length for the leg gather portion 41. An infant usually assumes a leg-forward posture, and when such an infant closes the legs, the absorbent structure 21 is pressed in the width direction. If the absorbent structure 21 is wide, the absorbent structure 21 is pressed by a larger force, and the widthwise central portion of the absorbent structure 21 may protrude toward the front side. Even when the infant subsequently opens the legs, it is possible to maintain the pressed shape of the absorbent structure 21, and there is a risk that the space for storing excrement in the absorbent structure 21 remains in a state of reduced width. If the space for storing excrement in the absorbent structure 21 is in a state of reduced width, there is a risk of excrement leaking out of the disposable diaper 10, and there is also a risk of the disposable diaper 10 needing to be replaced after a short time.

The present invention has been made in view of the above problems, and an object of the present invention is to facilitate securing a space for storing excrement in an absorbent main body.

A second problem is that, in the disposable diaper 10 disclosed in patent document 1, the absorbent body 22 has low rigidity in the width direction because the length in the width direction is short. For this reason, when the infant closes the legs and the absorber 22 is pressed from the outside inward in the width direction, the absorbent structure 21 and the absorber 11 may bulge between the legs of the infant, and there is a risk of having a bulky appearance.

The present invention has been made in view of the conventional problems such as described above, and an object of the present invention is to provide a disposable diaper having a slim appearance.

Means for solving the problems

A main aspect of the present invention for achieving the first problem described above is a pants-type absorbent article having an up-down direction, a left-right direction, and a front-back direction, the pants-type absorbent article comprising: an absorbent body, the absorbent body comprising: an absorbent core, and a leg stretch member which stretches in the up-down direction; a ventral waist-body part; a back-side waistline portion configured to be independent with respect to the abdomen-side waistline portion; and a pair of leg openings, the absorbent core being folded once and including a front core portion at a front side and a rear core portion at a rear side, the abdomen-side waist portion and the back-side waist portion each including a waist stretching member stretching in the left-right direction, in an extended state in which the leg stretching member and the waist stretching member are extended, the up-down direction length being greater than 1.65 times the left-right direction length with respect to an intersection point between a left-right direction one side end portion of the absorbent main body and a lower end of the abdomen-side waist portion to a lower end of the leg opening on a left-right direction side and the left-right direction length being greater than the left-right direction length with respect to a left-right direction length from the intersection point to a left-right direction one side end portion of the abdomen-side waist portion, the front core portion having at least one compression portion at a position below the lower end of the abdomen-side waist portion, the compressing portion has a predetermined length in the left-right direction.

A main aspect of the present invention for achieving the second problem described above is a pants-type absorbent article having an up-down direction, a left-right direction, and a front-back direction, the pants-type absorbent article comprising: an absorbent core; a ventral waist-body part; a back waist portion; and a leg stretch member which stretches in the up-down direction, the absorbent core being folded once and including a front core portion located on a front side and a rear core portion located on a rear side, the absorbent core including a narrow portion shorter in length in the left-right direction than an upper portion, the abdomen-side waist portion and the back-side waist portion each including a waist stretch member which stretches in the left-right direction, an up-down length of the narrow portion in the front core portion being longer than an up-down length of the narrow portion in the rear core portion in an extended state in which the leg stretch member and the waist stretch member are extended, the narrow portion of the front core portion having at least one compression portion having a predetermined left-right length.

Other features of the present invention will become apparent from the description of the specification and the drawings.

ADVANTAGEOUS EFFECTS OF INVENTION

With respect to the first problem, the present invention has an effect that, even if the wearer closes the legs and contracts the absorbent main body in the left-right direction so that the space (storage space) for storing excrement becomes small, since the left-right direction rigidity is increased by the compression portion, the absorbent main body easily returns to the state it was in before contraction when the wearer opened the legs, and the excrement storage space is easily secured.

As for the second problem, the present invention has an effect that, even when a narrow portion is provided in the front side core portion to secure mobility of the legs of an infant wearing the diaper, since the lateral rigidity is improved by providing a compressed portion in the narrow portion where lateral force is easily concentrated, the disposable diaper can be easily made to have a slim appearance.

Drawings

Fig. 1A is a schematic perspective view of a pants-type disposable diaper 1. Fig. 1B is a diagram showing an example of the worn state of the diaper 1.

Fig. 2 is a schematic plan view of the diaper 1 in an unfolded and elongated state as viewed from the skin-side surface side.

Fig. 3 is a schematic sectional view corresponding to an arrow a-a in fig. 2.

Fig. 4 is a schematic sectional view corresponding to the arrow B-B in fig. 2.

Fig. 5 is a diagram showing the absorber 11.

Fig. 6 is a schematic diagram showing a configuration in the schematic plan view of fig. 2.

Fig. 7A is a schematic front view of the diaper 1 in an extended state as viewed from the ventral side. Fig. 7B is a schematic sectional view of the absorbent core 11A in a region corresponding to the arrow X-X in fig. 7A.

Fig. 8 is a diagram showing the telescopic regions Df and Db and the non-telescopic regions Ff and Fb.

Fig. 9A is a diagram showing an absorber 11 according to another embodiment. Fig. 9B is a diagram showing an absorber 11 according to another embodiment.

Fig. 10 is a schematic plan view of the diaper 1 in a developed and extended state when viewed from the skin side according to another embodiment.

Detailed Description

At least the following matters will become clear with reference to the description of the present specification and the accompanying drawings.

A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction, the pants-type absorbent article comprising: an absorbent body, the absorbent body comprising: an absorbent core, and a leg stretch member which stretches in the up-down direction; a ventral waist-body part; a back-side waistline portion configured to be independent with respect to the abdomen-side waistline portion; and a pair of leg openings, the absorbent core being folded once and including a front core portion at a front side and a rear core portion at a rear side, the abdomen-side waist portion and the back-side waist portion each including a waist stretching member stretching in the left-right direction, in an extended state in which the leg stretching member and the waist stretching member are extended, the up-down direction length being greater than 1.65 times the left-right direction length with respect to an intersection point between a left-right direction one side end portion of the absorbent main body and a lower end of the abdomen-side waist portion to a lower end of the leg opening on a left-right direction side and the left-right direction length being greater than the left-right direction length with respect to a left-right direction length from the intersection point to a left-right direction one side end portion of the abdomen-side waist portion, the front core portion having at least one compression portion at a position below the lower end of the abdomen-side waist portion, the compressing portion has a predetermined length in the left-right direction.

According to this pants-type absorbent article, even if the wearer closes the legs and contracts the absorbent main body in the left-right direction to reduce the space (storage space) for storing excrement, since the left-right direction rigidity is increased by the compressed portion, when the wearer opens the legs, the absorbent main body is easily returned to its state before contraction, and the excrement storage space is easily secured.

In such a pants-type absorbent article, it is desirable that the compressed portion is a continuous compressed portion that is continuous from one side to the other side in the left-right direction, and a smaller angle of angles formed by a straight line connecting a lowest portion in the up-down direction to a highest portion in the up-down direction of an upper end of the continuous compressed portion and a straight line extending in the left-right direction is less than 45 degrees.

According to this pants-type absorbent article, the lateral rigidity provided by the compressed portion is higher than in the case where the smaller angle of the angles formed by the straight line connecting the lowest portion in the vertical direction to the highest portion in the vertical direction and the straight line extending in the lateral direction is equal to or greater than 45 degrees. This makes it easier to secure a space for storing excrement.

In such a pants-type absorbent article, it is desirable that the sum of the left-right direction lengths of all the compressed portions is larger than the sum of the up-down direction lengths of all the compressed portions.

According to the pants-type absorbent article, the rigidity in the lateral direction of the absorbent core is higher than that in the case where the sum of the lengths in the lateral direction of all the compressed portions is smaller than that in the vertical direction of all the compressed portions, and therefore, a space for storing excrement is more easily secured.

In such a pants-type absorbent article, it is desirable that the compressed portion be a straight line extending in the left-right direction.

According to the pants-type absorbent article, the lateral rigidity is increased by the compressed portion, and therefore, a space for storing excrement is more easily secured.

In such a pants-type absorbent article, it is desirable that the plurality of compressed portions are arranged side by side in the vertical direction.

According to the pants-type absorbent article, the lateral rigidity is further increased by the compressed portion, and therefore, a space for storing excrement is more easily secured.

In such a pants-type absorbent article, it is desirable that the front side core includes a convex portion and a concave portion in the non-skin side surface, and the compressed portion is a concave portion.

According to the pants-type absorbent article, the following can be prevented: when the absorbent core is folded with the skin-side surface on the inside, interference between the convex portions and the concave portions makes it difficult for the absorbent core to bend and deform the absorbent core. Further, the convex portions and the concave portions can be prevented from giving a wearer a sense of discomfort.

In such a pants-type absorbent article, it is desirable that the front side core includes a narrow portion having a shorter length in the left-right direction than the upper portion.

According to this pants-type absorbent article, a narrow portion is provided in the absorbent core. Therefore, even when an infant who often assumes a leg-forward posture wears a diaper and closes the legs in the right-left direction, it is possible to suppress the risk of the absorbent core being excessively contracted and inwardly deformed in the right-left direction, and the size of the storage space for storing excrement being reduced.

In such a pants-type absorbent article, it is desirable that the narrow portion has a narrowest portion whose left-right direction length is shortest, and that the left-right direction length of the compressed portion provided in the narrow portion is greater than or equal to the left-right direction length of the narrowest portion.

According to this pants-type absorbent article, the left-right direction length of the compressed portion is greater than or equal to the left-right direction length of the narrowest portion having the lowest rigidity among the absorbent cores, thus making it possible to further increase the left-right direction rigidity of the absorbent core.

In such a pants-type absorbent article, it is desirable that the front side core includes the compressed portion above a lower end of the abdomen side waist portion, the narrow portion has a narrowest portion whose left-right direction length is shortest, and a left-right direction end portion of one of the compressed portions provided in the front side core does not reach a corresponding left-right direction end portion of the front side core in a region of the front side core above the narrowest portion.

According to the pants-type absorbent article, it is possible to suppress excessive hardening of the region above the narrowest portion near the abdomen, and to suppress the movement of the abdomen region or the groin region of the wearer from being hindered.

In such a pants-type absorbent article, it is desirable that the plurality of compressed portions are arranged side by side in the vertical direction, and a vertical dimension of an interval between the adjacent compressed portions is larger than a vertical dimension of each of the compressed portions.

According to this pants-type absorbent article, the region where the compressed portion is not provided is larger in the up-down direction than the region having the rigid compressed portion, thus making it possible to suppress excessive hardening of the absorbent core.

In such a pants-type absorbent article, it is desirable that the front side core includes liquid absorbent fibers, and the front side core includes: a high-density region in which the density of the liquid-absorbent fibers is high; a low-density region in which the density of the liquid-absorbent fibers is low, the compressed portion is the high-density region, and a thickness at a center in an up-down direction of the low-density region is 1.3 times to 3.0 times a thickness at the center in the up-down direction of the compressed portion.

According to the pants-type absorbent article, the rigidity of the absorbent core is improved, and a space for storing excrement is more easily secured.

In such a pants-type absorbent article, it is desirable that the front side core includes the compressed portion above the lower end of the abdomen side waist portion.

According to the pants-type absorbent article, the abdomen-side waistline portion is more likely to be in close contact with the abdomen of the wearer.

In such a pants-type absorbent article, it is desirable that the center in the left-right direction of the compressed portion is the center in the left-right direction of the absorbent main body.

According to the pants-type absorbent article, eccentric deformation of the absorbent core due to movement of the wearer can be suppressed.

In such a pants-type absorbent article, it is desirable that the abdomen-side waistline portion includes: a telescopic region which is telescopic together with the waist telescopic member; and a non-stretchable region that is not stretchable, the non-stretchable region being provided in a center portion in a left-right direction of the abdomen-side waist portion, and both end portions in the left-right direction of the compression portion being provided outside the corresponding both end portions in the left-right direction of the non-stretchable region, respectively.

According to the pants-type absorbent article, the absorbent main body can be more easily kept in contact with the skin of the wearer.

In such a pants-type absorbent article, it is desirable that the abdomen-side waistline portion includes: a telescopic region which is telescopic together with the waist telescopic member; and a non-stretchable region that is not stretchable, the non-stretchable region being provided in a center portion in a left-right direction of the abdomen-side waist portion, and both end portions in the left-right direction of the compression portion being provided inside the corresponding both end portions in the left-right direction of the non-stretchable region, respectively.

According to the pants-type absorbent article, the contraction of the abdomen-side waist stretching member can suppress further hardening of the absorbent main body which is hardened by the contraction, and therefore the feeling of the pants-type absorbent article when worn can be improved.

In such a pants-type absorbent article, it is desirable that the absorbent main body includes: a pair of leakage preventing walls each having a leakage preventing wall telescoping member; a fixing portion which cannot stand up to the skin side; and an upright portion that can be erected toward the skin side, and a length of the compression portion in the left-right direction is greater than or equal to a distance between ends of the leakage preventing wall on the inner side in the left-right direction.

According to the pants-type absorbent article, the rigidity of the absorbent core can be higher than in the case where the lateral length of the compression portion is shorter than the distance between the lateral inner ends of the leakage preventing walls.

In such a pants-type absorbent article, it is desirable that the plurality of compressed portions are disposed at equal intervals in the vertical direction.

According to this pants-type absorbent article, the compressed portions are arranged side by side at equal intervals, thus making it possible to obtain uniform rigidity in the absorbent core.

In such a pants-type absorbent article, it is desirable that the front side core has a plurality of the compressed portions, and an interval between a lower compressed portion at a lowest position and an immediately adjacent lower compressed portion above the lower compressed portion at the lowest position among the plurality of the compressed portions is smaller than an interval between an upper compressed portion at a highest position and an immediately adjacent upper compressed portion below the upper compressed portion among a plurality of the compressed portions provided below a lower end of the abdomen-side waist portion.

According to this pants-type absorbent article, the less compressed portion is provided in the upper region of the absorbent core where the risk of the storage space being squeezed by the legs of the wearer is small, and the more compressed portion is provided in the lower region of the absorbent core where the risk of the storage space being squeezed is high. This makes it possible to increase the rigidity of the absorbent core in the right-left direction and secure a storage space.

A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction, the pants-type absorbent article comprising: an absorbent core; a ventral waist-body part; a back waist portion; and a leg stretch member which stretches in the up-down direction, the absorbent core being folded once and including a front core portion located on a front side and a rear core portion located on a rear side, the absorbent core including a narrow portion shorter in length in the left-right direction than an upper portion, the abdomen-side waist portion and the back-side waist portion each including a waist stretch member which stretches in the left-right direction, an up-down length of the narrow portion in the front core portion being longer than an up-down length of the narrow portion in the rear core portion in an extended state in which the leg stretch member and the waist stretch member are extended, the narrow portion of the front core portion having at least one compression portion having a predetermined left-right length.

According to this pants-type absorbent article, even if a narrow portion is provided in the front side core portion in order to ensure mobility of the legs of the infant wearing the diaper, the disposable diaper is likely to have a slim appearance because the lateral rigidity is improved by providing the compressed portion in the narrow portion where lateral force is likely to concentrate.

In such a pants-type absorbent article, it is desirable that the narrow portion has a plurality of the compressed portions.

According to the pants-type absorbent article, the lateral rigidity of the narrowed portion of the absorbent core can be further improved.

In such a pants-type absorbent article, it is desirable that the rear side core has at least one compressed portion, one of the at least one compressed portion is provided in the front side core, and the other of the at least one compressed portion is provided in the rear side core, and in the extended state, a left-right direction length of the one compressed portion is equal to a left-right direction length of the other compressed portion, and in the front side core, each left-right direction end of the one compressed portion reaches a corresponding end of the front side core, and in the rear side core, each left-right direction end of the other compressed portion does not reach a corresponding end of the rear side core.

According to the pants-type absorbent article, the front side core portion is shorter in length in the left-right direction so as to allow the wearer to more easily move his legs, and the left-right direction rigidity is increased to further suppress the front side core portion from bulging in the front-rear direction. On the other hand, the rear core portion has an uncompressed and low-rigidity region on the left-right direction outer side of the compression portion, and therefore, the low-rigidity region can easily conform to the shape of the hip region, thus making it possible to suppress leakage of excrement outward in the left-right direction.

In such a pants-type absorbent article, it is desirable that the narrow portion has a narrowest portion having the shortest left-right direction length, the rear side core portion has at least one of the compressed portions, and the left-right direction length of the compressed portion in the rear side core portion is greater than or equal to the left-right direction length of the narrowest portion.

According to the pants-type absorbent article, the lateral rigidity of the rear core portion can be increased. Further, the absorbent core can be more largely suppressed from being deformed and wedged into the hip joint of the wearer than in the case where the lateral length of the compression section is shorter than the lateral length of the narrowest section.

In such a pants-type absorbent article, it is desirable that the sum of the left-right direction lengths of all the compressed portions is larger than the sum of the up-down direction lengths of all the compressed portions.

According to this pants-type absorbent article, the rigidity of the absorbent core in the left-right direction can be set higher than in the case where the sum of the lengths in the left-right direction of all the compressed portions is smaller than the sum of the lengths in the up-down direction.

In such a pants-type absorbent article, it is desirable that the compressed portion be a straight line extending in the left-right direction.

According to the pants-type absorbent article, the rigidity in the right-left direction can be further improved by the compressed portion.

In such a pants-type absorbent article, it is desirable that the pants-type absorbent article further includes an absorbent body including an absorbent core, the absorbent body including: a pair of leakage preventing walls each having a leakage preventing wall telescoping member; a fixing portion which cannot stand up to the skin side; and an upright portion that can be erected toward the skin side, and a lateral length of the compression portion is larger than a distance between lateral inner ends of the leakage preventing wall.

According to the pants-type absorbent article, the rigidity of the absorbent core can be higher than in the case where the lateral length of the compression portion is shorter than the distance between the lateral inner ends of the leakage preventing walls.

In such a pants-type absorbent article, it is desirable that the front side core has a plurality of the compressed portions, and an interval between a lower compressed portion at a lowest position and an immediately adjacent lower compressed portion above the lower compressed portion at the lowest position among the plurality of the compressed portions is smaller than an interval between an upper compressed portion at a highest position and an immediately adjacent upper compressed portion below the upper compressed portion among a plurality of the compressed portions provided below a lower end of the abdomen-side waist portion.

According to this pants-type absorbent article, the region of the front side core portion near the abdomen-side waist portion has a lower risk of the front side core portion bulging forward, and therefore, less compressed portions are provided. In contrast, the lower region of the front core portion has a higher risk of the front core portion bulging forward, and therefore more compression portions are provided, thus improving the left-right direction rigidity and making it possible to suppress the bulging forward.

Embodiments of the present invention are described in detail below with reference to the accompanying drawings

Basic structure of underpants type disposable diaper

Fig. 1A is a schematic perspective view of a pants-type disposable diaper 1. Fig. 1B is a diagram showing an example of the worn state of the diaper 1. Fig. 2 is a schematic plan view of the diaper 1 in an unfolded and elongated state as viewed from the skin-side surface side. Fig. 3 is a schematic sectional view corresponding to an arrow a-a in fig. 2. Fig. 4 is a schematic sectional view corresponding to the arrow B-B in fig. 2. The "developed state" is a state in which the side portions of the diaper 1, i.e., the side portion 20a of the abdomen-side waistline portion 20 and the side portion 30a of the back-side waistline portion 30, are pulled apart and the diaper 1 is developed flat. The "stretched state" is a state in which the stretch member provided in the diaper 1 is stretched to such an extent that the wrinkles in the diaper 1 are no longer visible. Specifically, the diaper 1 is elongated until the size of a member (for example, a belly-side waist portion 20 described later) constituting the diaper 1 matches or approaches the size of the member itself. The line C-C in fig. 2 is the center line in the left-right direction. For convenience, the adhesive is not shown in fig. 3.

As shown in fig. 1, the pants-type diaper 1 has an up-down direction, a left-right direction, and a front-back direction, and the diaper 1 is provided with a waistline opening BH and a pair of leg openings LH. The waist opening BH side is an upper side and a side corresponding to the crotch of the wearer is a lower side with respect to the vertical direction. In the diaper 1 in the state shown in fig. 2 (unfolded and extended state), the vertical direction is referred to as the "longitudinal direction", one side in the longitudinal direction is also referred to as the "abdomen side", the other side is also referred to as the "back side", and the side of the central portion C10 in the longitudinal direction is also referred to as the "lower side". With respect to the front-rear direction, the side corresponding to the abdomen of the wearer is referred to as the front side, and the side corresponding to the back of the wearer is referred to as the rear side. The diaper 1 has a thickness direction as shown in fig. 3, and a side in contact with a wearer in the thickness direction is a skin side, and a side opposite to the skin side is a non-skin side.

The diaper 1 is a so-called three-piece diaper, and includes an absorbent main body 10, an abdominal-side waistline portion 20, and a back-side waistline portion 30, the back-side waistline portion 30 being configured as a separate member with respect to the abdominal-side waistline portion. The abdomen-side waistline portion 20 covers the abdomen side of the wearer, and the back-side waistline portion 30 covers the back side of the wearer. The absorbent main body 10 is substantially rectangular in plan view. As shown in fig. 3, the abdomen-side upper end portion and the back-side upper end portion of the absorbent main body 10 overlap with the skin-side surfaces of the waistline portions 20 and 30, respectively. The abdomen-side waistline portion 20 and the back-side waistline portion 30 are substantially rectangular in plan view, and their respective longitudinal directions coincide with the left-right direction.

As shown in the developed state in fig. 2, the shape of the diaper 1 is bilaterally symmetric about the center line C-C. The abdomen-side waistline portion 20 and the back-side waistline portion 30 are separated in the longitudinal direction, and the absorbent main body 10 is disposed so as to bridge between the abdomen-side waistline portion 20 and the back-side waistline portion 30. The non-skin side surface of the abdomen-side upper end portion and the non-skin side surface of the back-side upper end portion of the absorbent main body 10 are joined to the skin side surfaces of the waist portions 20 and 30, respectively, using an adhesive (not shown), the absorbent main body 10 in the developed state as shown in fig. 2 is folded at the central portion C10 so that the abdomen-side waist portion 20 and the back-side waist portion 30 face each other, and then the left and right direction both side portions 20a of the abdomen-side waist portion 20 are joined to the left and right direction both side portions 30a of the back-side waist portion 30, thereby obtaining the diaper 1 in the pants-type state.

The abdomen-side waistline portion 20 and the back-side waistline portion 30 respectively include waistline stretching members 23, 33 and soft skin side sheets 21, 31 and non-skin side sheets 22, 32 made of nonwoven fabric. Due to the waist stretching members 23 and 33, the abdominal-side waist portion 20 and the back-side waist portion 30 can stretch and fit to the waist of the wearer. The skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 are non-stretchable sheets which themselves have substantially no stretchability in the left-right direction. For example, the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 may be composed of SMS nonwoven fabric (spunbond/meltblown/spunbond nonwoven fabric), spunbond nonwoven fabric, air-permeable nonwoven fabric, plastic sheet, apertured plastic sheet, or laminate thereof.

The abdomen-side waist stretching member 23 includes a plurality of elastic strands 23a stretching in the left-right direction and a stretchable sheet 23b stretching in the up-down direction and the left-right direction. The elastic threads 23a are fixed between the skin side sheet 21 and the non-skin side sheet 22 in the abdomen-side waist portion 20 with a vertical spacing in a state of being stretched in the left-right direction, except for the upper end portion of the abdomen-side waist portion 20. The stretchable panel 23b is fixed at a position between the skin side panel 21 and a portion of the non-skin side panel 22 folded back from the non-skin side to the skin side, is positioned on the non-skin side of the absorbent main body 10, is positioned at the upper end of the abdomen-side waist portion 20, and is fixed in a state of being stretched in the left-right direction. The stretch sheet 23b is a nonwoven fabric or plastic stretchable film sheet which includes elastic thermoplastic elastomer fibers made of a polyurethane elastomer and inelastic thermoplastic resin fibers made of a polyolefin resin such as polypropylene (PP) and the like, and has been subjected to an appropriate stretching process such as gear stretching and the like.

Since the stretchable sheet 23b is disposed in the upper end portion of the abdomen-side waistline portion 20 instead of the elastic thread 23a, the upper end portion of the abdomen-side waistline portion 20 is fitted to the wearer as a flat surface. Therefore, this suppresses local contraction of the abdominal region, and can make the abdominal-side waistline stretch member 23 less likely to leave a contraction mark on the wearer's skin. In particular, the abdominal region of the infant is raised more frontward than the back side, and therefore it is more preferable to reduce the risk of local contraction of the abdominal region by the abdomen-side waist portion 20.

The back-side waistline stretching member 23 includes a plurality of elastic threads 33 which are stretchable in the left-right direction, and the plurality of elastic threads 33 are disposed at intervals in the up-down direction from the upper end portion to the lower end portion of the back-side waistline portion 30 and are fixed between the skin side sheet 31 and the non-skin side sheet 32 in a state of being stretched in the left-right direction.

Note that the abdominal-side waistline portion 20 and the back-side waistline portion 30 have stretchable regions Df and Db, respectively, which are stretchable together with the abdominal-side waistline stretchable member 23 and the back-side waistline stretchable member 33, and non-stretchable regions Ff and Fb, which are not stretchable together with the abdominal-side waistline stretchable member 23 and the back-side waistline stretchable member 33. Fig. 8 is a diagram showing the telescopic regions Df and Db and the non-telescopic regions Ff and Fb. In fig. 8, the telescopic regions Df and Db are indicated by diagonal hatching extending downward to the right, and the non-telescopic regions Ff and Fb are indicated by diagonal hatching extending downward to the left. The non-stretchable regions Ff and Fb are provided in the center portions in the left-right direction of the abdomen-side waistline portion 20 and the back-side waistline portion 30, respectively, specifically, in the regions overlapping with the absorbent core 11A in the front-back direction. The provision of the non-stretchable regions Ff and Fb reduces the risk of the absorbent core 11A contracting and deforming in the left-right direction due to contraction of the elastic members 23 and 33.

Fig. 4 is a schematic sectional view corresponding to the arrow B-B in fig. 2. The dimensions are appropriately changed in fig. 4 to facilitate understanding of the configuration with respect to the thickness direction. As shown in fig. 4, the absorbent body main body 10 includes a pair of leakage preventing wall members 15, a front sheet 12, an absorbent body 11, a back sheet 13, and an exterior sheet 14 in this order from the skin side in the thickness direction, and these members have been bonded to each other using a hot melt adhesive or the like. It is sufficient that the front sheet 12 is a liquid-permeable sheet, and examples thereof include hydrophilic air-permeable nonwoven fabric, spunbond nonwoven fabric and the like. It is sufficient that the back sheet 13 is a liquid-impermeable sheet, and examples thereof include a polyethylene film, a polypropylene film, and a hydrophobic SMS nonwoven fabric. The front sheet 12 and the back sheet 13 are large enough to cover the entire absorbent body 11. The leakage preventing wall member 15 and the exterior sheet 14 may be a liquid-permeable sheet or a liquid-impermeable sheet, and one example thereof is a hydrophobic SMS nonwoven fabric. It should be noted that, in the present embodiment, since the leakage preventing wall portion 50 and the leg gather portion 60 are formed by the leakage preventing wall member 15 and the outer sheet 14, respectively, it is preferable that the leakage preventing wall member 15 and the outer sheet 14 are constituted by a liquid impermeable material.

The absorbent body 11 is generally rectangular in plan view, and includes an absorbent core 11A that absorbs and retains liquid such as urine and a core wrap sheet 11B that covers the outer peripheral surface of the absorbent core 11A. Fig. 5 is a diagram showing the absorber 11. One example of the core wrap sheet 11B is a liquid-permeable sheet made of tissue paper, nonwoven fabric, or the like. In fig. 5, the absorbent core 11A covered with the core wrap sheet 11B is shown by a solid line for convenience.

The absorbent core 11A is obtained by shaping liquid absorbent fibers such as pulp containing a Super Absorbent Polymer (SAP) or the like into a substantially hourglass shape. In the present embodiment, the basis weight of the liquid absorbent fibers in the absorbent core 11A is substantially uniform throughout the absorbent core 11A. A portion of the absorbent core 11A located on the ventral side (front side) of the central portion C10 is a front side core portion 11Af, and a portion located on the back side (back side) of the central portion C10 is a back side core portion 11 Ab. As shown in fig. 5 and the like, the longitudinal center portion of the absorbent core 11A has a short length in the left-right direction, and thus has a contracted shape. Specifically, a front narrow portion (also referred to as a "narrow portion") 11fn is provided below the upper portion 11fu of the front core portion 11Af, and a rear narrow portion 11bn is provided below the upper portion 11bu of the rear core portion 11 Ab. The length of the front narrow portion 11fn in the longitudinal direction is longer than the length of the rear narrow portion 11bn in the longitudinal direction. The narrowest portion 11n, which is the portion of the absorbent core 11A having the shortest length in the lateral direction, is provided at the narrowest portion 11fn of the front core portion 11 Af. The front narrower portion 11fn is longer in the vertical direction than the rear narrower portion 11 bn. Further, in the absorbent core 11A, a plurality of compression sections E extending in the left-right direction are provided at predetermined intervals in the up-down direction between each other. The compression section E will be described later. In addition, the rear core 11Ab includes a slit S penetrating in the thickness direction (front-rear direction), thus allowing the absorbent core 11A to conform to the shape of the buttocks of the wearer.

The pair of leakage preventing wall members 15 constitute a pair of leakage preventing wall portions 50. The pair of leakage preventing walls 50 are so-called leg gathers, and extend along the longitudinal direction of the absorbent body 10 on both sides in the left-right direction of the absorbent body 11. Specifically, the leakage preventing wall members 15 are folded so as to sandwich the plurality of leakage preventing wall stretchable members 51, and the folded portions of the leakage preventing wall members 15 are arranged on the left-right direction inner side and extend from the left-right direction side ends of the absorbent main body 10 to positions overlapping with the left-right direction side portions of the absorbent body 11.

Fig. 6 is a schematic diagram showing a configuration in the schematic plan view of fig. 2. Note that, in fig. 6, the lumbar expansion members 23 and 33, the seams S, and the like have been removed from the schematic plan view of fig. 2 for convenience. The pair of leakage preventing wall portions 50 includes: a pair of end joining portions 52 and a pair of side joining portions 53 that join the leakage preventing wall member 15 to the exterior sheet 14 and the front sheet 12; a leakage preventing wall stretchable member 51 stretchable in the longitudinal direction (vertical direction); a pair of fixing portions 55 that cannot stand up toward the skin; and a pair of rising portions 56 capable of rising toward the skin. In the leakage preventing wall portion 50, a region from the upper end on the abdominal-side waistline portion 20 side to the lower end of the end portion bonded portion 52 and a region from the upper end on the back-side waistline portion 30 side to the lower end of the end portion bonded portion 52 are fixing portions 55. In addition, in the leakage preventing wall portion 50, a region located below the lower end of the end joining portion 52 of the abdomen-side waist portion 20 and below the lower end of the end joining portion 52 of the back-side waist portion 30 is a standing portion 56. The laterally flowing excrement is blocked by the leakage preventing wall portion 50.

The pair of end joining portions 52 and the pair of side joining portions 53 are portions joined by an adhesive such as a hot melt adhesive. Note that the joining of the end joining portion 52 and the side joining portion 53 is not limited to fixation with an adhesive, and may be fixed by pressing, crimping (crimp), or the like.

The pair of end joining portions 52 are disposed at both longitudinal ends of the absorbent main body 10, and are "adhesive portions" for preventing the fixing portion 55 from rising toward the skin side. The end joining portions 52 each extend from one end of the absorbent main body 10 to a position overlapping with the upper end of the absorbent body 11 in the longitudinal direction. Each of the pair of side joining portions 53 may extend from one end to the other end in the longitudinal direction of the absorbent main body 10, and may extend from the ventral end to the longitudinal central portion C10 of the absorbent main body 10. The side coupling portions 53 are disposed on the left and right outer sides of the end joining portion 52.

Due to the contraction of the leakage preventing wall stretchable member 51, the rising portion 56 of the leakage preventing wall portion 50 can rise from the portion adjacent to the side portion joining portion 53 toward the skin side on the left-right direction inner side. Note that since the leakage preventing wall stretchable members 51 are spaced apart from each other, when the leakage preventing wall portions 50 are in the standing state, the leakage preventing wall portions 50 are easily brought into contact with the skin surface of the wearer, and hence the texture can be improved.

The outer sheet 14 constitutes a pair of leg gather portions 60 including the leg stretch members 16. The leg gather portion 60 is a portion forming the leg opening LH, and fits around the leg of the wearer due to contraction of the leg stretch member 16.

Both ends in the left-right direction of the outer sheet 14 are folded inward, and the leg stretch members 16 are disposed between the folded portions of the outer sheet 14, thereby constituting leg gathers 60. The leg stretch members 16 are a plurality of elastic threads extending in the longitudinal direction, and the leg stretch members 16 are fixed between two layers of the exterior sheet 14 folded inward in the left-right direction in a state of being elongated in the longitudinal direction of the absorbent main body 10.

In the case of using an elastic thread as the leg stretch member 16, it is preferable to provide a plurality of elastic threads, and it is more preferable to provide 5 or more elastic threads. In fig. 2 and the like, 8 leg stretch members 16 are arranged side by side in the left-right direction. In the case where one leg stretchable member 16 is provided, there is a risk of local compression of the wearer's leg, but providing more leg stretchable members 16 allows the leg gather 60 to fit the entire wearer's leg face, thus making it possible to reduce the risk of local compression of the wearer's leg.

< first problem >

If more leg stretch members 16 are disposed spaced farther apart in the left-right direction, the leg gather portion 60 can more easily fit to the leg surface of the wearer. Fig. 7A is a schematic front view of the diaper 1 in an extended state as viewed from the ventral side. Fig. 7A shows a state in which each of the elastic members 23, 33, 51, and 16 of the pants-type diaper 1 is extended. As shown in fig. 7A, the leg opening LH is determined based on the vertical length (L1) from the intersection point P between the left-right direction side end of the absorbent main body 10 and the lower end of the abdominal-side waistline portion 20 to the lower end of the leg opening LH and the horizontal length (L2) from the intersection point P to the left-right direction side end of the abdominal-side waistline portion 20.

The longer the length of the absorbent main body 10 in the left-right direction, the greater the number of leg stretch members 16 that can be arranged. Specifically, it is preferable that the vertical length (L1) from the intersection point P to the lower end of the leg opening LH is 1.65 times or more the horizontal length (L2) from the intersection point P to the horizontal one-side end of the abdominal-side waistline portion 20. However, when the length L1 is greater than 1.65 times the length L2, the length of the absorbent main body 10 in the left-right direction increases, and therefore the absorbent main body 10 is easily pressed in the left-right direction when the wearer closes the legs with the diaper in a worn state (fig. 1B). Since an infant as a main object of the diaper 1 is often in a leg-forward posture, the side regions N where the absorbent core 11 is not provided in the portion of the absorbent main body 10 on the abdomen side shown in fig. 1 are pushed inward in the left-right direction by the legs of the wearer, and the left-right direction central region R of the absorbent main body 10 easily protrudes forward.

In a worn state, the absorbent main body 10 and the absorbent core 11 are generally U-shaped when viewed from the side. Since the diaper 1 needs to absorb not only liquid such as urine but also solid such as feces, a storage space for storing excrement is required on the skin side of the absorbent core 11A and the absorbent main body 10. However, in the conventional disposable diaper, once the central region M projects forward, the left-right direction central portion of the absorbent core 11A projects forward and the left-right direction side portions are recessed to form a convex shape, and the storage space of the absorbent main body 10 becomes small. Once the storage space becomes small, the forwardly protruding shape of the central region M is maintained in the absorbent main body 10 even if the wearer opens the legs, and the storage space remains small, there is a risk that excrement which cannot be stored in the storage space will leak from the diaper and the excrement will remain in the partial region, and if the excrement remains in the partial region, the worn diaper will look drooping, so that the diaper is changed earlier.

To solve this problem, a compressed portion E is provided in the absorbent core 11A of the diaper 1. The compression section E will be explained below.

< compression section E > for solving the first problem

The compression section E ═

The compression section E is formed by passing the untreated absorbent core 11A through a nip between a projecting roller (not shown) having a plurality of projections and a back-up roller (not shown) having a smooth surface to perform compression treatment from the non-skin side of the absorbent core. Fig. 7B is a schematic sectional view of the absorbent core 11A in a region corresponding to the arrow X-X in fig. 7A. The region of the absorbent core 11A not subjected to the compression process is the non-compressed portion U.

The compressed portion E is a groove formed by compression, and in these portions, the density of the liquid absorbent fiber such as pulp is higher than that in the non-compressed portion U, and the rigidity is also higher than that in the non-compressed portion U. In the present embodiment, the grooves of the compression part E have a substantially uniform depth. The density of the liquid-absorbent fibers varies depending on the depth of the grooves, and the deeper the grooves, the higher the density of the liquid-absorbent fibers, and the shallower the grooves, the lower the density of the liquid-absorbent fibers. As shown in fig. 5 and the like, the compressed parts E extend in the left-right direction, have a left-right direction length We of 70mm and an up-down direction length De of 3mm, and are arranged side by side at equal intervals in the up-down direction, that is, the interval Du between the compressed parts E adjacent in the up-down direction is 10 mm. Further, the center in the left-right direction of the compression section E is at the center in the left-right direction of the absorbent core 11A, and the absorbent core 11A has a left-right symmetric shape.

The non-compressed part U is thicker than the compressed part E. For this reason, it is preferable that the absorbent core 11A has convex and concave portions on the non-skin side. As shown in fig. 7B, the absorbent core 11A has a substantially smooth skin-side surface, and has convex and concave portions on the non-skin-side surface. The convex portion is the non-compression portion U, and the concave portion is the compression portion E. According to this configuration, it is possible to prevent a situation in which the absorbent core 11A is not easily bent due to interference between the convex portions and the concave portions of the absorbent core 11A located on the skin-side surface of the absorbent core 11A when the pant diaper 1 is folded at the longitudinal direction central portion with the skin-side of the absorbent core 11A located on the inner side. In addition, since the skin-side surface is substantially flat, the risk of discomfort to the wearer due to the convex and concave portions of the absorbent core 11A and the rigid compression portion E can be reduced.

As shown in fig. 2 and the like, a compression portion E having a predetermined length in the left-right direction is provided in the front core portion 11Af at a position below the lower end of the abdominal-side waistline portion 20, and providing the rigid compression portion E increases the left-right direction rigidity of the front core portion 11Af in the region below the lower end of the abdominal-side waistline portion 20. Therefore, this increases the strength against deformation of the absorbent core 11A in the left-right direction, and makes it easier for the absorbent core 11A to maintain a planar shape in the left-right direction. Even if the left-right direction length of the absorbent main body 10 of the diaper 1 is long, and the absorbent main body 10 may be pressed inward in the left-right direction when the wearer closes the legs, there is a case where: the central portion M (fig. 1A) of the absorbent main body 10 protrudes forward due to being pressed between the legs of the wearer, and the storage space for storing excrement becomes small, and even in this case, when the wearer opens the legs outward in the left-right direction, the absorbent core 11A tries to maintain a planar shape in the left-right direction, thus making it easier to eliminate the state in which the central portion M of the absorbent main body 10 protrudes forward. If the protrusion of the central portion M is eliminated, the absorbent main body 10 easily returns to its shape before being pressed, and a space for storing excrement is easily secured. Ensuring a storage space makes it possible to reduce the risk of leakage of excrement from the diaper 1. This also suppresses the situation where excrement is stored in a localized area of the absorbent main body 10, thereby suppressing the risk that the absorbent main body 10 will exhibit sagging due to the excrement, and making it possible to also reduce the risk of replacing the diaper 1 earlier.

Note that, by providing at least one compression section E in the front side core section 11Af at a position below the lower end of the abdominal side waistline section 20, the rigidity of the absorbent core 11A can be increased, and a storage space for excrement in the absorbent main body 10 can be secured. Note that it is more preferable that the plurality of compression portions E are arranged side by side in the vertical direction as shown in fig. 2 and the like. Therefore, this makes it possible to further increase the rigidity in the left-right direction.

As shown in fig. 2 and the like, the compression portions E are preferably arranged in parallel at equal intervals in the vertical direction. The provision of the compressed sections E side by side at equal intervals in the up-down direction makes it possible to impart rigidity to the absorbent core 11A that is uniform in the up-down direction, thus suppressing the risk of the absorbent core 11A undergoing eccentric deformation.

Likewise, by providing the compression section E in such a manner that the center in the left-right direction of the compression section E is at the center in the left-right direction of the absorbent core 11A and the center in the left-right direction of the absorbent main body 10, it is possible to suppress the risk of the absorbent core 11A undergoing eccentric deformation in the left-right direction due to the movement of the wearer.

The sum (∑ We) of the left-right direction lengths We of all the compression sections E is larger than the sum (∑ De) of the up-down direction lengths De of all the compression sections E (Σ We > Σde). In other words, as shown in fig. 5, the plurality of compressed portions E includes compressed portions E1, E2, E3, … in this order from the ventral side along the longitudinal direction. Here, the sum (We1+ We2+ We3+ …) of the lengths We in the left-right direction of all the compressed portions E (E1, E2, E3, …) is preferably larger than the lengths (De1+ De2+ De3+ …) in the up-down direction of all the compressed portions E (E1, E2, E3, …). Therefore, as compared with the case where the sum of the lengths in the left-right direction (Σ We) of all the compression sections E is smaller than the sum of the lengths in the up-down direction (Σ De), the rigidity in the left-right direction of the absorbent core 11A can be set high, and a storage space for storing excrement can be more easily secured.

Note that the compression portion E may have a desired shape, such as a curved shape or a shape having one or more corners. However, even when having a desired shape, it is preferable that the sum (Σ We) of the left-right direction lengths We of all the compression sections E is larger than the sum (Σ De) of the up-down direction lengths De of all the compression sections E (Σ We > Σde). This is because the rigidity in the left-right direction of the absorbent core 11A can be set higher than in the case where the sum of the lengths in the left-right direction (Σ We) of all the compression sections E is smaller than the sum of the lengths in the up-down direction (Σ De).

It is more preferable that the compression portion E is shaped as a straight line extending in the left-right direction. Since the region of increased rigidity is shaped into a straight line extending in the left-right direction, the left-right direction rigidity of the absorbent core 11A is increased, and it is easier to secure a space for storing excrement.

In the up-down direction, the dimension Du of each interval between adjacent compressed portions E is larger than the dimension (De) of each compressed portion E (De < Du). In other words, the interval (Du) between the compression portions E adjacent in the up-down direction is larger than the up-down direction length (De) of each compression portion, and therefore, the low rigidity region of the non-compression portion U is longer than the high rigidity region of the compression portion E in the up-down direction. Therefore, this makes it possible to suppress the risk of the absorbent core 11A being excessively hardened by the compressed portions E, and to improve the texture to the wearer's skin.

As shown in FIG. 7B, it is preferable that the thickness (Tu) at the center in the vertical direction of the non-compressed part U where the density of the liquid absorbent fiber is low is 1.3 to 3.0 times (Te x 1.3. ltoreq. Tu. ltoreq. Te x 3.0) the thickness (Te) at the center in the vertical direction of the compressed part E where the density of the liquid absorbent fiber is high. If the thickness Tu at the center in the up-down direction of the non-compression portion U is less than 1.3 times the thickness Te at the center in the up-down direction of the compression portion E, sufficient rigidity in the left-right direction for securing a storage space for storing excrement in the absorbent core 11A cannot be secured. However, if the thickness Tu at the center in the up-down direction of the non-compressed portion U is larger than 3.0 times the thickness Te at the center in the up-down direction of the compressed portion E, the thickness of the compressed portion E is too small and there is a risk of occurrence of folding deformation at the compressed portion E, or the density of the liquid absorbent fibers in the compressed portion E is too high and there is a risk of adversely affecting the dispersion of excrement in the longitudinal direction. For this reason, by setting the thickness Tu to 1.3 to 3.0 times the thickness (Te) at the center in the up-down direction of the compression section E where the density of the liquid absorbent fiber is high, it is possible to prevent deformation of the absorbent core 11A and leakage of excrement while also increasing the rigidity of the absorbent core 11A in the left-right direction, thus making it easy to secure a storage space for storing excrement.

Further, the length (We) of the compressed portion E in the lateral direction is preferably equal to or greater than the distance (Dg) between the laterally inner side ends of the leakage preventing wall portion 50 (We ≧ Dg). As shown in fig. 2, the left-right direction length (We) of the compressed portion E is equal to the distance (Dg) between the left-right direction inner side end portions of the leakage preventing walls (We ═ Dg). According to this configuration, the rigidity of the absorbent core 11A can be higher than in the case where the length (We) in the left-right direction of the compression portion E is shorter than the distance (Dg) between the left-right direction inner side ends of the leakage preventing wall portions 50. Note that the longer the lateral length (We) of the compression section E, the higher the lateral rigidity of the absorbent core 11A.

As shown in fig. 2 and the like, the absorbent core 11A has narrower portions 11fn and 11bn, the narrower portions 11fn and 11bn being shorter in the left-right direction length than the upper portions 11fu and 11 bu. Since the front side narrowing portions 11fn are provided in the front side core portion 11Af, even if an infant who normally assumes a leg-forward posture wears a diaper and closes the legs in the left-right direction, it is possible to suppress the risk that the absorbent core 11A will obstruct the movement of the legs of the wearer, and to suppress the risk that the absorbent core 11A is excessively pressed inward in the left-right direction, thus making it possible to suppress the risk of a reduction in the size of the storage space for storing excrement.

Further, it is preferable that the left-right direction length (We) of the compressed portion E provided in the front narrow portion 11fn is greater than or equal to the left-right direction length (Wn) of the narrowest portion 11 n. The absorbent core 11A having the front side narrower portions 11fn and the narrowest portions 11n has lower rigidity in the right-left direction than an absorbent core without the front side narrower portions 11fn and the like. For this reason, by providing the compression section E having a left-right direction length equal to or greater than the left-right direction length of the narrowest section 11n having the lowest left-right direction rigidity, it is possible to realize a case where the left-right direction rigidity of the absorbent core 11A is greater than in a case where the left-right direction length of the compression section E is shorter than the left-right direction length of the narrowest section 11 n.

Preferably, in a region above the narrowest part 11n in the front core part 11Af, the left and right direction ends of the compressed part E do not reach the left and right direction ends of the front core part 11 Af. In other words, in fig. 5, the non-compression portions U are present between the left-right direction end portions of the compression portions E1, E2, and E3 and the left-right direction end portion of the front core portion 11 Af. The region of the front side core portion 11Af above the narrowest portion 11n is a region near the abdomen, and therefore, if the compressed portion E is too wide, there is a risk that the wearer feels the absorbent core 11A hard. For this reason, a configuration is adopted in which the movement of the abdominal region and the groin region of the wearer is not restricted, thereby making it possible to prevent the absorbent core 11A from becoming excessively hard.

As shown in fig. 2 and the like, the compression portion E is preferably also provided above the lower end of the abdominal-side waistline portion 20 in the front core portion 11 Af. In other words, it is preferable that the compressed portion E is provided in a portion overlapping with the abdominal-side waistline portion 20 in the front-rear direction. Therefore, the highly rigid absorbent core 11A can be pressed tightly against the skin of the wearer by the abdomen-side waist stretching members 23 of the abdomen-side waist portion 20, and therefore the absorbent main body 10 can be more easily attached to the skin of the wearer.

As shown in fig. 8, both ends in the left-right direction of the compression portion E in the front core portion 11Af are preferably provided outside the non-stretchable region Ff. The non-stretchable region Ff is a region to which the abdomen-side waist stretchable member 23 does not exert a contractive force, and is a region where the absorbent main body 10 easily rises away from the skin of the wearer. Therefore, by increasing the rigidity of the absorbent core 11A in the region longer than the non-stretchable region Ff in the left-right direction, the absorbent body 10 is more easily maintained in a state of contact with the skin of the wearer. Note that, it is more preferable that both ends in the left-right direction of the compression portion E are provided inside the expansion and contraction region Df. The stretchable region Df exerts a force to pull both end portions of the compressed portion E toward the skin of the wearer, and therefore, even a portion of the absorbent main body 10 overlapping with the non-stretchable region Ff in the front-rear direction can more easily maintain a state of being in close contact with the skin of the wearer.

< second problem >)

Since the infant normally assumes a leg-forward posture, the vertical length of the front side narrower section 11fn in the absorbent core 11A is set longer than the vertical length of the rear side narrower section 11bn shown in fig. 5 in order to reduce the risk of the relatively hard absorbent body 11 obstructing the leg movement of the infant. The front narrow portion 11fn and the rear narrow portion 11bn are portions that are susceptible to a force in the left-right direction generated by the movement of the legs of the infant, and particularly when the infant closes the legs inward in the left-right direction, the force in the left-right direction tends to concentrate on the front narrow portion 11 fn. For this reason, if a force in the left-right direction is applied to the front narrow portion 11fn, the central region M of the absorbent main body 10 is easily deformed in a buckling manner as shown in fig. 1A. In other words, the front narrow portion 11fn is easily deformed into a shape having a portion that is concave and convex in the front-rear direction. There is a problem that: when the diaper 1 is viewed from the front, the deformed absorbent core 11 and the absorbent main body 10 give an impression of bulkiness.

To solve this problem, a compressed portion E is provided in the absorbent core 11A of the diaper 1. The compression section E will be explained below.

< compression section E > for solving the second problem

The compression section E ═

The compression section E is formed by passing the untreated absorbent core 11A through a nip between a projecting roller (not shown) having a plurality of projections and a back-up roller (not shown) having a smooth surface to perform compression treatment from the non-skin side of the absorbent core. Fig. 7A is a schematic front view of the diaper 1 in an extended state as viewed from the ventral side. Fig. 7B is a schematic sectional view of the absorbent core 11A in a region corresponding to the arrow X-X in fig. 7A. The region of the absorbent core 11A not subjected to the compression process is the non-compressed portion U.

The compressed portion E is a groove formed by compression, and in these portions, the density of the liquid absorbent fiber such as pulp is higher than that in the non-compressed portion U, and the rigidity is also higher than that in the non-compressed portion U. In the present embodiment, the grooves of the compression part E have a substantially uniform depth. The density of the liquid-absorbent fibers varies depending on the depth of the grooves, with the deeper the grooves the higher the density of the liquid-absorbent fibers, and the shallower the grooves the lower the density of the liquid-absorbent fibers. As shown in fig. 5 and the like, the compressed parts E extend in the left-right direction, have a left-right direction length We of 70mm and an up-down direction length De of 3mm, and are arranged side by side at equal intervals in the up-down direction, that is, the interval Du between the compressed parts E adjacent in the up-down direction is 10 mm. Further, the center in the left-right direction of the compression section E is at the center in the left-right direction of the absorbent core 11A, and the absorbent core 11A has a left-right symmetric shape.

The non-compressed part U is thicker than the compressed part E. For this reason, it is preferable that the absorbent core 11A has convex and concave portions on the non-skin side. As shown in fig. 7B, the absorbent core 11A has a substantially smooth skin-side surface, and has convex and concave portions on the non-skin-side surface. The convex portion is the non-compression portion U, and the concave portion is the compression portion E. According to this configuration, it is possible to prevent the absorbent core 11A from being less likely to bend due to interference between the convex portions and the concave portions of the absorbent core 11A on the skin-side surface of the absorbent core 11A when the pant diaper 1 is folded at the longitudinal direction central portion with the skin-side of the absorbent core 11A on the inner side. In addition, since the skin-side surface is substantially flat, the risk of discomfort to the wearer due to the convex and concave portions of the absorbent core 11A and the highly rigid compression portion E can be reduced.

As shown in fig. 5 and the like, a compression portion E having a predetermined length in the left-right direction is provided in the front narrow portion 11fn which is longer than the rear narrow portion 11fb in the up-down direction, and providing a compression portion E having high rigidity increases the rigidity of the front narrow portion 11fn in the left-right direction. Therefore, this increases the left-right direction rigidity of the front side narrower portions 11fn, and makes it easier for the absorbent core 11A to maintain a planar shape in the left-right direction.

In this way, even if the vertical length of the front narrower portion 11fb is set longer than the vertical length of the rear narrower portion 11fb in order to ensure the mobility of the legs of the infant in the leg-forward posture, the lateral rigidity of the front core portion 11Af can be improved so as to resist the lateral force that tends to concentrate on the front narrower portion 11fb, and the deformation of the front core portion 11Af can be suppressed. In other words, since the compression portions E are provided, the front core portion 11Af more easily maintains the planar shape. For this reason, it is possible to suppress the buckling of the absorbent core 11 and the absorbent body 10 between the legs of the infant and to impart a slim appearance to the diaper 1 when viewed from the front. Imparting a slim appearance to the diaper 1 suppresses the risk of the diaper 1 impairing the movement of the infant, thereby allowing the infant to be more active and preventing the absorbent body 10 from having a bulky appearance, which helps to determine the amount of excrement stored in the diaper 1 and to replace the diaper 1 at an appropriate time. In addition, the absorbent core 11A having high rigidity in the right-left direction easily maintains a planar shape in the right-left direction, and therefore, even if an infant closes the legs and reduces the size of the space for storing excrement in the absorbent body 10, the absorbent body 10 easily returns to its original shape due to the absorbent core 11A when the infant opens the legs, and the space for storing excrement is easily secured in the absorbent body 10. Ensuring a space for storing excrement in the diaper 1 makes it possible to suppress the risk of excrement leaking from the diaper 1.

Note that, since at least one compressed portion E is provided in the front narrow portion 11fn in the front core portion 11Af, the rigidity of the front narrow portion 11fn can be increased, and the diaper 1 more easily has a slim appearance. Note that it is more preferable that the plurality of compression portions E are arranged side by side in the vertical direction as shown in fig. 2 and the like. Therefore, this makes it possible to further increase the rigidity in the left-right direction.

As shown in fig. 2 and the like, the compression portions E are preferably arranged in parallel at equal intervals in the vertical direction. The provision of the compression sections E side by side at equal intervals in the up-down direction makes it possible to impart rigidity to the absorbent core 11A that is uniform in the up-down direction, thus suppressing the risk of the absorbent core 11A undergoing eccentric deformation.

Likewise, by providing the compression section E in such a manner that the center in the left-right direction of the compression section E is at the center in the left-right direction of the absorbent core 11A and the center in the left-right direction of the absorbent main body 10, it is possible to suppress the risk of the absorbent core 11A undergoing eccentric deformation in the left-right direction due to the movement of the wearer.

The sum (∑ We) of the left-right direction lengths We of all the compression sections E is larger than the sum (∑ De) of the up-down direction lengths De of all the compression sections E (Σ We > Σde). In other words, as shown in fig. 5, the plurality of compressed portions E includes compressed portions E1, E2, E3, … in this order from the ventral side along the longitudinal direction. Here, the sum (We1+ We2+ We3+ …) of the lengths We in the left-right direction of all the compressed portions E (E1, E2, E3, …) is preferably larger than the lengths (De1+ De2+ De3+ …) in the up-down direction of all the compressed portions E (E1, E2, E3, …). Therefore, the rigidity of the absorbent core 11A in the left-right direction can be set higher and the absorbent core 11A can more easily maintain the planar shape, as compared with the case where the sum of the lengths (Σ We) in the left-right direction of all the compression sections E is smaller than the sum of the lengths (Σ De) in the up-down direction.

Note that the compression portion E may have a desired shape, such as a curved shape or a shape having one or more corners. However, even when having a desired shape, it is preferable that the sum (Σ We) of the left-right direction lengths We of all the compression sections E is larger than the sum (Σ De) of the up-down direction lengths De of all the compression sections E (Σ We > Σde). This is because the rigidity in the left-right direction of the absorbent core 11A can be set higher than in the case where the sum of the lengths in the left-right direction (Σ We) of all the compression sections E is smaller than the sum of the lengths in the up-down direction (Σ De).

It is more preferable that the compression portion E is shaped as a straight line extending in the left-right direction. Since the region of increased rigidity is shaped into a straight line extending in the left-right direction, the left-right direction rigidity of the absorbent core 11A is increased, and the absorbent core 11A more easily maintains a planar shape.

In the up-down direction, the dimension Du of each interval between adjacent compressed portions E is larger than the dimension (De) of each compressed portion E (De < Du). In other words, the interval (Du) between the compression portions E adjacent in the up-down direction is larger than the up-down direction length (De) of each compression portion, and therefore, the low rigidity region of the non-compression portion U is longer than the high rigidity region of the compression portion E in the up-down direction. Therefore, this makes it possible to suppress the risk of the absorbent core 11A being excessively hardened by the compressed portions E, and makes it possible to improve the texture to the wearer's skin.

The rigidity in the left-right direction of the absorbent core 11A having the narrower portions 11fn and the narrowest portions 11n is lower than the rigidity in the left-right direction of the absorbent core without the narrower portions 11fn and the like. Therefore, since the left-right direction length (We) of the compressed portion E provided in the narrower portion 11fn is greater than or equal to the left-right direction length (Wn) of the narrowest portion 11n (We ≧ Wn), the rigidity of the absorbent core 11A can be set higher than in the case where the left-right direction length of the compressed portion E is shorter than the left-right direction length of the narrowest portion 11 n.

Further, the length (We) of the compressed portion E in the lateral direction is preferably equal to or greater than the distance (Dg) between the laterally inner side ends of the leakage preventing wall portion 50 (We ≧ Dg). As shown in fig. 2, the left-right direction length (We) of the compressed portion E is equal to the distance (Dg) between the left-right direction inner side end portions of the leakage preventing walls (We ═ Dg). According to this configuration, the rigidity of the absorbent core 11A can be higher than in the case where the length (We) in the left-right direction of the compression portion E is shorter than the distance (Dg) between the left-right direction inner side ends of the leakage preventing walls 50. Note that the longer the lateral length (We) of the compression section E, the higher the lateral rigidity of the absorbent core 11A.

As shown in fig. 2 and 5, at least one compression portion E is also provided in the rear core portion 11 Ab. One of the compression sections E provided in the front core portion 11Af is a front compression section (one compression section) Ep, and one of the compression sections provided in the rear core portion 11Ab is a rear compression section (the other compression section) Eq. Specifically, the fourth compression section E, which is located away from the center portion C10 upward in the front core portion 11Af, is the front compression section Ep, and the fourth compression section E, which is located away from the center portion C10 upward in the rear core portion 11Ab, is the rear compression section Eq. When the diaper 1 is in the extended state, the left-right direction lengths of the front side compression part Ep and the rear side compression part Eq are the same length We. At this time, it is preferable that the end portions in the left-right direction of the front compression unit Ep reach the end portions of the front core portions 11Af, and the end portions in the left-right direction of the rear compression unit Eq do not reach the end portions of the rear core portions 11 Ab. In other words, the non-compression section U is not disposed outside the end of the front compression section Ep in the left-right direction, but is disposed outside the end of the rear compression section Eq in the left-right direction.

In this way, since the front core portion 11Af has the front narrow portion 11fn, the legs of the infant can be moved more easily, and since the compression portions Ep extend to the left and right direction ends of the front core portion 11Af, the rigidity of the front core portion 11Af increases. In other words, the front side core portions 11Af increase the mobility of the legs of the infant, while also making it easier for the front side core portions 11Af to maintain a planar shape and making it easier for the absorbent main body 10 to impart a slimy impression. In addition, the rear core 11Ab has the non-compressed portion U outside the compressed portion Eq in the left-right direction, and therefore the compressed portion Eq having high rigidity in the left-right direction allows the rear core 11Ab to maintain a planar shape, and the low-rigidity non-compressed portion U outside the compressed portion Eq can easily conform to the shape of the buttocks. The leakage of the excrement in the left and right directions to the outside is more easily prevented by the non-compression portion U conforming to the shape of the buttocks.

Further, it is preferable that the left-right direction length (Web) of the compression portion E provided in the rear core portion 11Ab is equal to or longer than the left-right direction length (Wn) of the narrowest portion 11n (Web ≧ Wn). Providing the compression portion E in the rear core portion 11Ab can improve the rigidity of the rear core portion 11Ab in the right-left direction. However, if the left-right direction length (Web) of the compression portion E in the rear side core portion 11Ab is shorter than the left-right direction length (Wn) of the narrowest portion 11n, there is a risk that the rear side core portion 11Ab deforms into a shape in which the absorbent core 11A is wedged into the intergluteal cleft of the infant. Therefore, the left-right direction length (Web) of the compression portion E in the rear core portion 11Ab is greater than or equal to the left-right direction length (Wn) of the narrowest portion 11n, and therefore, the compression portion E of the rear core portion 11Ab can more easily maintain a planar shape than in the case where the left-right direction length (Web) of the compression portion E in the rear core portion 11Ab is shorter than the left-right direction length (Wn) of the narrowest portion 11 n.

Similarly, it is preferable that the left-right direction end portions of the compressed portions E do not reach the left-right direction end portions of the front core portion 11Af in the region above the narrowest portion 11n of the front core portion 11 Af. In other words, in fig. 5, the non-compression portions U are present between the left-right direction end portions of the compression portions E1, E2, and E3 and the left-right direction end portion of the front core portion 11 Af. The region of the front side core portion 11Af above the narrowest portion 11n is a region near the abdomen, and therefore, if the compressed portion E is too wide, there is a risk that the wearer feels the absorbent core 11A hard. For this reason, a configuration is adopted in which the movement of the abdominal region and the inguinal region of the wearer is not restricted, so that the absorbent core 11A can be prevented from becoming excessively hard.

As shown in fig. 2 and the like, the compressed portion E is preferably provided above the lower end of the abdominal-side waistline portion 20 in the front core portion 11 Af. In other words, it is preferable that the compressed portion E is provided in a portion overlapping with the abdominal-side waistline portion 20 in the front-rear direction. Therefore, the highly rigid absorbent core 11A can be brought into close contact with the skin of the wearer by the abdomen-side waist stretching members 23 of the abdomen-side waist portion 20, and therefore the absorbent main body 10 can be more easily attached to the skin of the wearer.

As shown in fig. 8, both ends in the left-right direction of the compression portion E in the front core portion 11Af are preferably provided outside the non-stretchable region Ff. The non-stretchable region Ff is a region where the abdomen-side waist stretchable member 23 does not exert a contractive force, and therefore is a region where the absorbent main body 10 easily rises away from the wearer's skin. Therefore, by increasing the rigidity of the absorbent core 11A in a region longer than the non-stretchable region Ff in the left-right direction, the absorbent main body 10 is more easily maintained in a state of being in contact with the skin of the wearer. Note that it is more preferable that both ends in the left-right direction of the compression portion E are provided in the expansion/contraction region Df. The stretchable region Df exerts a force to pull both end portions of the compressed portion E toward the skin of the wearer, and therefore, even a portion of the absorbent main body 10 overlapping with the non-stretchable region Ff in the front-rear direction can be more easily maintained in a state of being in close contact with the skin of the wearer.

In other embodiments, the invention is not limited to the specific embodiments described

Although the embodiments of the present invention have been described above, the above embodiments of the present invention are only for facilitating understanding of the present invention, and are not to be construed as limiting the present invention in any way. Various changes or modifications may be made to the invention without departing from the spirit thereof, and equivalents thereof are encompassed. For example, variations to be described below are possible.

Although the compression portion E shaped into a straight line extending in the left-right direction is provided in the above-described embodiment, the shape of the compression portion is not limited thereto. Any desired shape such as a wavy shape or the like may be applied as long as the compression portion E has a predetermined length in the left-right direction. Fig. 9A is a diagram showing an absorber 11 according to another embodiment. In fig. 9A, the absorbent core 11A and the like are covered with the core wrap sheet 11B, but are shown in solid lines for convenience. As shown in fig. 9A, the compression portion E may be mountain-shaped and protrude to the ventral side. These compressed portions E are formed as continuous compressed portions that are continuous from one side to the other side in the left-right direction. Preferably, the smaller angle θ E is less than 45 degrees (θ E <45 °) among two angles formed by a straight line connecting the vertically lowest portion Ej of the upper end of the compression section E to the vertically highest portion Ek and a straight line extending in the left-right direction. Therefore, the rigidity of the absorbent core 11A is increased to a greater extent by the compressed portion E than in the case where the angle θ E is greater than or equal to 45 degrees, and therefore, it is easier to secure a storage space for storing excrement. In addition, the absorbent core 11A more easily maintains a planar shape.

Also in this case, the sum (Σ We) of the left-right direction lengths We of all the compression sections E is larger than the sum (Σ De) of the up-down direction lengths De of all the compression sections E (Σ We > Σde). In other words, as shown in fig. 9A, the plurality of compressed portions E includes compressed portions E21, E22, E23, … in this order from the ventral side along the longitudinal direction. Here, the sum (We21+ We22+ We23+ …) of the lengths We in the left-right direction of all the compressed portions E (E21, E22, E23, …) is preferably larger than the lengths (De21+ De22+ De23) in the up-down direction of all the compressed portions E (E21, E22, E23, …). Therefore, the rigidity of the absorbent core 11A in the left-right direction can be set higher than in the case where the sum (Σ We) of the lengths in the left-right direction of all the compression sections E is smaller than the sum (Σ De) of the lengths in the up-down direction.

In addition, although the left-right direction length of the portion subjected to the compression process is the same as the left-right direction length (We) of the compression portion E and the left-right direction length (Wn) of the narrowest portion 11n in the above-described embodiment, the length (Wr) of the portion (R) subjected to the compression process may be longer than the left-right direction length (We) of the compression portion E and the left-right direction length (Wn) of the narrowest portion 11n as shown in fig. 9B. Fig. 9B is a diagram showing an absorber 11 according to another embodiment. In fig. 9B, the absorbent core 11A and the like are covered with the core wrap sheet 11B, but are shown in solid lines for convenience. In the absorbent body 11 shown in fig. 9B, the absorbent core 11A is subjected to compression processing in a state of being covered with the core wrap sheet 11B. The region subjected to the compression treatment on the left and right direction outer sides of the absorbent core 11A is a portion where the respective portions of the core wrap sheet 11B are compressed together. In this way, a configuration is possible in which: compression treatment is performed not only in the absorbent core 11A but also in a portion where the absorbent core 11A is not provided, so that the respective portions of the core wrap sheet 11B are compressed together. In the example shown in fig. 9B, the narrowest section 11n of the absorbent core 11A is positively compressed to the end thereof, thereby making it possible to positively increase the left-right direction rigidity of the absorbent core 11A.

Further, although the compression portions E are arranged side by side at equal intervals in the up-down direction in the above-described embodiment, it is not limited thereto. The compression parts E may be arranged side by side at unequal intervals. For example, fig. 10 is a schematic plan view of the diaper 1 in a developed and extended state when viewed from the skin side according to another embodiment. As shown in fig. 10, the interval Dab may be smaller than the interval Dcd (Dab < Dcd) with Dab as the interval between the lowest lower compression part Ea among the compression parts E in the front core portion 11Af and the immediately adjacent lower compression part Eb above the lower compression part Ea, and Dcd as the interval between the highest upper compression part Ec among the compression parts E disposed below the lower end of the abdominal-side waistline portion 20 and the immediately adjacent upper compression part Ed below the upper compression part Ec. Therefore, less compressed portions E are provided in the upper region of the front side core portions 11Af, which has a lower risk of the absorbent core 11A being deformed and the crush storage space due to the legs of the wearer, thus making it possible to prevent the absorbent core 11A from becoming excessively hard. On the other hand, more compression sections E are provided in the lower region of the front side core section 11Af, which has a higher risk of the excrement storage space being crushed and deformed, thus increasing the left-right direction rigidity of the absorbent core 11A so that the storage space can be more easily secured and the planar shape of the absorbent core 11A can be more easily maintained.

In addition, although the left and right direction end portions of the compression portion E are provided outside the left and right direction end portions of the non-stretchable region Ff in the above embodiment, it is not limited thereto. Both ends in the left-right direction of the compression portion E may be provided inside both ends in the left-right direction of the non-stretchable region Ff. According to this configuration, the compressed portion E may not be provided in the portion of the absorbent main body 10 that is normally hardened due to contraction of the abdominal-side stretchable member 23, thus making it possible to further improve the texture at the time of wearing the diaper.

Although a plurality of compressed sections E having the same groove depth are formed in the absorbent core 11A in the above embodiment, it is not limited thereto. Compressed portions E having different depths may be formed in the absorbent core 11A. For example, a configuration may be such that: the compressed portion E having the deeper groove is formed in a region (narrowest portion 11n) of the front core portion 11Af that is a region where the left-right direction rigidity of the lower side of the front core portion a will increase, and the compressed portion E having the shallower groove is formed in a portion near the abdomen-side waist portion 20.

In addition, the compressed sections E formed in the absorbent core 11A do not necessarily all have the same length in the left-right direction and the same length in the up-down direction. Although all the compressed parts E have the same length in the right-left direction and the length in the up-down direction in the diaper 1 described above, they may have different lengths. For example, a configuration may be such that: wherein the compressed portion E having a longer length in the left-right direction and a longer length in the up-down direction is formed in a region where the left-right direction rigidity of the lower side of the front core portion a is to be increased, and the compressed portion E having a shorter length in the left-right direction and a shorter length in the up-down direction is formed in a region near the abdomen-side waist portion 20 where deformation of the absorbent main body 10 is less likely to occur.

In the above embodiment, both ends in the left-right direction of the compression section E reach both ends in the left-right direction of the absorbent core 11A in the narrowest section 11n, and both ends in the left-right direction of the compression section E do not reach both ends in the left-right direction of the absorbent core 11A in the region above the narrowest section 11n, but is not limited thereto. For example, in all regions of the front core portion 11Af (including the region above the narrowest portion 11n), both the left and right direction end portions of the compression portion E may reach both the left and right direction end portions of the absorbent core 11A. Since both ends in the left-right direction of the compression section E reach both ends in the left-right direction of the absorbent core 11A in a wide range, the left-right direction rigidity of the front core section 11Af can be further increased.

Further, although the absorbent core 11A includes the narrowest portion 11n in the front side core portion 11Af in the present embodiment, it is not limited thereto. For example, in the absorbent core 11A, the narrowest portion 11n may be provided in the lower portion of the diaper 1 and extend from the front side core portion 11Af to a region continuous with the rear side core portion 11 Ab. In addition, the absorbent core 11A may be rectangular and have no narrow portions 11fn and 11 bn.

In the above-described embodiment, as shown in fig. 2 and the like, the diaper 1 has a bilaterally symmetric shape, and the vertical length (L1) from the intersection point P to the lower end of the leg opening LH is 1.65 times or more the horizontal length (L2) from the intersection point P to the one horizontal end of the abdomen-side waistline 20, and also on the other side, but is not limited thereto. For example, a configuration may be such that: the diaper 1 has a laterally asymmetric shape in which the vertical length (L1) from the intersection point P to the lower end of the leg opening LH is 1.65 times or more (L1 is not less than L2X 1.65) the vertical length (L2) from the intersection point P to the lateral end of the abdomen-side waistline portion 20 on one side in the lateral direction, and the vertical length (L1) from the intersection point P to the lower end of the leg opening LH is less than 1.65 times the vertical length (L2) from the intersection point P to the lateral end of the abdomen-side waistline portion 20 on the other side in the lateral direction (L1< L2X 1.65). Even in this case, the compression section E having a predetermined length in the left-right direction is provided below the lower end of the abdominal-side waistline section 20, thus making it possible to improve the rigidity of the absorbent core 11A and suppress the deformation thereof.

Although the elastic threads and the stretch panels are shown as examples of the elastic members (22, 32, 51, and 16) provided in the abdominal-side waistline portion 20, the back-side waistline portion 30, the leakage preventing wall portions 50, and the leg portions 60 in the above-described embodiment, they are not limited thereto. For example, one or more sheet-shaped elastic members such as an elastic film or the like may be provided in addition to the elastic thread and the stretch panel. In addition, only a portion of the elastic member exhibiting stretchability (so-called effective length portion) is shown in the drawings. For this reason, a portion of the elastic member that does not exhibit stretchability may be present outside in the longitudinal direction of the illustrated elastic member. In addition, the arrangement and number of the elastic members are not limited to the illustrated configuration.

Although the pants-type absorbent article is described as a so-called three-piece disposable diaper including the abdomen-side waist portion 20, the back-side waist portion 30, and the absorbent main body 10 in the above-described embodiment, it is not limited thereto. For example, the pant-shaped absorbent article may be a diaper: the exterior sheet 14 connects the abdomen-side waist portion 20 and the back-side waist portion 30 to form an integrated body (so-called two-piece diaper).

Description of the reference numerals

1 diaper (pants-type disposable diaper, pants-type absorbent article),

10 an absorbent main body,

11 an absorbent body,

An 11A absorbent core, an 11B core wrapping sheet,

11Af front core part, 11Ab rear core part,

11fu upper part, 11fn front narrow part (narrow part),

11bu upper part, 11bn rear side narrow part (narrow part), 11n narrowest part,

12 front surface pieces, 13 back surface pieces,

14 outer sheets, 15 leakage preventing wall members, 16 leg stretchable members,

20 abdomen-side waist portion (first waist portion), 20a side portion,

21 skin side sheet, 22 non-skin side sheet,

23 ventral waist stretching members (waist stretching members), 23a elastic threads, 23b stretching pieces,

30 back waist part, 30a side part,

31 skin side sheet, 32 non-skin side sheet,

33 a back waist stretching member (waist stretching member),

50 leakage preventing wall parts, 51 leakage preventing wall stretchable members,

52 end connecting parts, 53 side connecting parts,

55 fixed part, 56 rising part,

60 leg gather parts,

LH leg opening, BH waist opening,

Df stretch region, Db non-stretch region,

An Ff expansion region, a Db non-expansion region,

E a compression part,

Ea lower compression part, Eb adjacent lower compression part,

Ec upper compression part, Ed adjacent upper compression part,

An Ep front compression unit (one compression unit), an Eq rear compression unit (the other compression unit),

M central region, N side regions, P intersection,

R the portion subjected to the compression treatment, S-slits,

U is a non-compression part.