Individual package of absorbent article
阅读说明:本技术 吸收性物品的独立包装体 (Individual package of absorbent article ) 是由 林俊久 山本成海 内田祥平 于 2020-03-05 设计创作,主要内容包括:本发明提供一种剥离片介于具备宽幅部的吸收性物品与独立包装片之间的吸收性物品的独立包装体,其中,容易使吸收性物品以宽幅部为起点从剥离片脱离。本发明提供一种吸收性物品的独立包装体(10),其包括独立包装片(11)、将一面固着于独立包装片的1个以上的剥离片以及以能够拆装的方式固着于1个以上的剥离片各自的另一面的吸收性物品(1),其中,吸收性物品在长度方向(D<Sub>L</Sub>)的前侧或者后侧具有宽幅部(20),在宽幅部的宽度方向(D<Sub>W</Sub>)的两端部分别配置有宽度方向端部剥离片,将宽度方向端部剥离片从独立包装片朝向宽度方向剥离时的剥离强度比使吸收性物品从宽度方向端部剥离片朝向宽度方向脱离时的剥离强度大。(The invention provides an independent packaging body of an absorbent article, wherein a stripping sheet is arranged between the absorbent article with a wide width part and the independent packaging sheet, wherein the absorbent article is easy to be stripped from the stripping sheet by taking the wide width part as a starting point. The invention provides a suckerAn individual package (10) for absorbent articles, comprising an individual package sheet (11), 1 or more release sheets having one surface thereof fixed to the individual package sheet, and an absorbent article (1) detachably fixed to the other surface of each of the 1 or more release sheets, wherein the absorbent article is arranged in the longitudinal direction (D) L ) Has a wide part (20) on the front side or the rear side, and is arranged in the width direction (D) of the wide part W ) The widthwise end portion peel sheets are disposed at both end portions of the absorbent article, and the peel strength when the widthwise end portion peel sheets are peeled from the individual package sheet in the widthwise direction is larger than the peel strength when the absorbent article is peeled from the widthwise end portion peel sheets in the widthwise direction.)
1. An individual package of an absorbent article, comprising:
an independent packaging sheet;
1 or more release sheets having one surface fixed to the individual packaging sheet by a 1 st adhesive part; and
an absorbent article detachably fixed to the other surface of each of the 1 or more release sheets via a 2 nd adhesive section,
the individual package has a length direction and a width direction in an unfolded state,
the absorbent article has a wide width portion on the front side or the rear side in the longitudinal direction,
a width-direction end peeling sheet constituting the 1 or more peeling sheets is disposed at each of the width-direction both ends of the wide width portion,
the peel strength when the width direction end portion peel sheet is peeled from the individual packaging sheet in the width direction is larger than the peel strength when the absorbent article is peeled from the width direction end portion peel sheet in the width direction.
2. The individual package of absorbent articles according to claim 1,
the outer edge in the width direction of the 2 nd adhesive section in contact with the width-direction end release sheet is disposed at the same position as or inside the outer edge in the width direction of the 1 st adhesive section in contact with the width-direction end release sheet.
3. The individual package of an absorbent article according to claim 1 or 2,
the absorbent article includes an absorber and a functional layer containing a functional agent,
the functional layer is disposed in the wide width portion,
in the developed state, the functional layer is disposed adjacent to one side in the longitudinal direction of the absorber.
4. The individual package of absorbent articles according to claim 3,
the absorbent article further comprises a liquid-permeable surface sheet,
in the unfolded state, the first and second support members are,
the ratio of the maximum dimension in the longitudinal direction of the top sheet to the maximum dimension in the longitudinal direction of the absorbent body is larger than the ratio of the maximum dimension in the width direction of the top sheet to the maximum dimension in the width direction of the absorbent body.
5. The individual package of absorbent articles according to claim 3,
the 2 nd adhesive portion that comes into contact with the widthwise end portion release sheet is divided into a plurality of portions, and the 2 nd adhesive portion that is divided into a plurality of portions is arranged substantially parallel to each other along the longitudinal direction.
6. The individual package of absorbent articles according to claim 5,
the sum of the areas of the 2 nd adhesive sections in contact with the widthwise end portion release sheet is 60% or less of the area of the widthwise end portion release sheet.
7. The individual package of absorbent articles according to claim 1,
the rigidity of the release sheet is large compared to the rigidity of the individual packaging sheet.
8. The individual package of absorbent articles according to claim 1,
the outer edge in the longitudinal direction of the 2 nd adhesive portion in contact with the longitudinal end release sheet constituting the 1 or more release sheets arranged at both ends in the longitudinal direction is arranged at the same position as or inside the outer edge in the longitudinal direction of the 1 st adhesive portion in contact with the longitudinal end release sheet.
9. The individual package of absorbent articles according to claim 1,
the absorbent article has 1 or more folding lines extending in the longitudinal direction.
10. The individual package of absorbent articles according to claim 1,
the individual package body has:
a 1 st widthwise folding portion which is provided on one end side in the widthwise direction and is folded in the widthwise direction with a 1 st lengthwise folding line along the lengthwise direction as a base point;
a 2 nd widthwise folded portion which is provided on the other end side in the widthwise direction and is folded in the widthwise direction with a 2 nd fold line in the lengthwise direction along the lengthwise direction as a base point;
a 1 st longitudinal folded portion that is folded in the longitudinal direction with a 1 st fold line in the width direction as a base point, the 1 st and 2 nd longitudinal folded portions being provided at one end side in the longitudinal direction in a state where the 1 st and 2 nd longitudinal folded portions are folded; and
a 2 nd lengthwise folded portion that is folded in the lengthwise direction with a 2 nd fold line in the widthwise direction provided on the other end side in the lengthwise direction as a base point, in a state where the 1 st and 2 nd widthwise folded portions are folded,
the individual package of the absorbent article comprises an adhesive tape having one end portion joined to a surface of a 2 nd end portion of the 1 st longitudinal folded portion and the other end portion joined to a surface of the 2 nd longitudinal folded portion, the 2 nd end portion being located on a side opposite to a 1 st end portion on the 1 st fold line side in the width direction of the 1 st longitudinal folded portion in the longitudinal direction,
the 1 st lengthwise folded portion includes, in the width direction:
a pair of side portions located at both sides of the adhesive tape; and
a middle portion located between the pair of side portions, in contact with at least one of the pair of side portions,
the individual package of the absorbent article further includes reinforcing members disposed on the pair of side portions, respectively.
Technical Field
The present invention relates to an individual package of an absorbent article.
Background
An individual package of an absorbent article having a functional layer containing a functional agent is known, which includes an absorbent article and an individual package sheet. For example, patent document 1 discloses an individually wrapped absorbent article package including an absorbent article including an absorber and a functional layer, and an individually wrapped sheet fixed to a non-skin-facing surface side of the absorbent article.
Disclosure of Invention
Problems to be solved by the invention
In the individual package of the absorbent article, a release sheet may be interposed between the absorbent article and the individual package sheet in order to enable the absorbent article to be attached to and detached from the individual package sheet. In this case, adhesive portions such as hot melt adhesives are formed between the absorbent article and the release sheet and between the release sheet and the individual packaging sheet. Further, in the case of detaching the absorbent article from the release sheet, it is also necessary to configure the release sheet so as not to be peeled from the individual package sheet and to facilitate the detachment of the absorbent article from the release sheet.
Here, in the individual package of the absorbent article described in patent document 1, the functional layer is provided on one of the front side and the rear side in the longitudinal direction of the absorbent article with respect to the region where the absorber is provided. The end portion of the absorbent article on the side where the functional layer is disposed is wider than the other portions, and an adhesive portion is provided at the end portion in the width direction of the wide width portion in order to fix the wide width portion to the individual packaging sheet. Therefore, in order to effectively peel the individual package sheet from the adhesive portion at the widthwise end portion of the wide width portion, when the widthwise end portion of the wide width portion is pinched and the absorbent article is to be peeled off, a force is applied in the widthwise direction of the absorbent article, and therefore, it is necessary to configure such that the peeling sheet is difficult to peel from the individual package sheet and the absorbent article is easy to peel from the peeling sheet with respect to the force in the widthwise direction.
Thus, the present invention provides an individual package of an absorbent article in which a release sheet is interposed between an absorbent article having a wide width portion and an individual package sheet, and in which the absorbent article is easily detached from the release sheet from the wide width portion as a starting point.
Means for solving the problems
In order to solve the above problems, the present inventors provide an absorbent article individual package comprising: an independent packaging sheet; 1 or more release sheets having one surface fixed to the individual packaging sheet by a 1 st adhesive part; and an absorbent article detachably fixed to the other surface of each of the 1 or more release sheets via a 2 nd adhesive portion, wherein the individually wrapped body has a longitudinal direction and a width direction in an unfolded state, the absorbent article has a wide width portion on a front side or a rear side in the longitudinal direction, the width direction end portion release sheets constituting the 1 or more release sheets are disposed on both ends in the width direction of the wide width portion, respectively, and a peel strength when the width direction end portion release sheets are peeled from the individually wrapped body in the width direction is larger than a peel strength when the absorbent article is peeled from the width direction end portion release sheets in the width direction.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, in the individual package of the absorbent article in which the absorbent article having the wide width portion at the end portion in the longitudinal direction is fixed to the individual package sheet via the release sheet, the absorbent article can be easily detached from the individual package sheet with the wide width portion as a starting point.
Drawings
FIG. 1 is a perspective view showing an
FIG. 2 is a view taken along the thickness direction D from the
FIG. 3 is a view taken along the thickness direction D from the back sheet 3 side in the developed stateTA plan view of the sanitary napkin 1.
FIG. 4 is a longitudinal direction D of the sanitary napkin 1 in the unfolded stateLCentral axis C extending upwardlyLCross-sectional view of a cross-section of (a).
Fig. 5 is a perspective view for explaining a folding method of the sanitary napkin 1 for forming the
Fig. 6 is a perspective view showing an
Fig. 7 is a plan view showing the
Fig. 8 is a perspective view showing a method of forming the
Fig. 9 is a schematic diagram illustrating the operation of the
Description of the reference numerals
1. Sanitary napkins (absorbent articles); 2. a surface sheet; 3. a back sheet; 4. an absorbent body; 5. a side panel; 6. a wing portion; 7. an adhesive part for fixing clothes; 71. a wing part fixing adhesive part; 72. a front side bonding part; 10. an individual package; 11. an independent packaging sheet; 12. an adhesive tape; 13. a wide-width part peeling sheet; 14. an absorber position release sheet; 15. a wing part peeling sheet; 16. a peel-off sheet adhesive portion; 20. a wide part; 21. a functional layer; 30. an absorption region; 40. an overlapping portion.
Detailed Description
The present invention relates to the following aspects.
[ solution 1]
An individual package of an absorbent article, comprising: an independent packaging sheet; 1 or more release sheets having one surface fixed to the individual packaging sheet by a 1 st adhesive part; and an absorbent article detachably fixed to the other surface of each of the 1 or more release sheets via a 2 nd adhesive portion, wherein the individually wrapped body has a longitudinal direction and a width direction in an unfolded state, the absorbent article has a wide width portion on a front side or a rear side in the longitudinal direction, the width direction end portion release sheets constituting the 1 or more release sheets are disposed on both ends in the width direction of the wide width portion, respectively, and a peel strength when the width direction end portion release sheets are peeled from the individually wrapped body in the width direction is larger than a peel strength when the absorbent article is peeled from the width direction end portion release sheets in the width direction.
According to claim 1 of the present invention, in the unfolded state of the individual package, the peel strength when the width-direction end portion peel sheet arranged at both width-direction end portions of the wide width portion is peeled from the individual package sheet is larger than the peel strength when the absorbent article is peeled from the width-direction end portion peel sheet. Therefore, when the widthwise end of the wide width portion of the absorbent article is pinched and the absorbent article is to be separated from the individual packaging sheet in the widthwise direction, the individual packaging sheet is difficult to be separated from the release sheet on the side having a large peel strength, and the absorbent article is easy to be separated from the release sheet on the side having a small peel strength.
[ solution 2]
The individually wrapped absorbent article according to claim 1, wherein the outer edge in the width direction of the 2 nd adhesive section in contact with the width direction end release sheet is disposed at the same position as or inside the outer edge in the width direction of the 1 st adhesive section in contact with the width direction end release sheet.
According to
[ solution 3]
The individually wrapped absorbent article according to
According to claim 3 of the present invention, since the absorbent article includes, in addition to the absorber, a functional layer disposed adjacent to one side in the longitudinal direction of the absorber and disposed in the wide width portion, the dimension in the longitudinal direction of the absorbent article including the wide width portion tends to increase. In such an absorbent article, when the absorbent article is peeled off by pinching the wide width portion, the absorbent article is easily separated in the width direction, and the absorbent article is easily separated from the individual packaging sheet by applying the present invention.
[ solution 4]
The individually wrapped absorbent article according to claim 3, wherein the absorbent article further comprises a liquid-permeable top sheet, and in the unfolded state, a ratio of a maximum dimension in a longitudinal direction of the top sheet to a maximum dimension in a longitudinal direction of the absorbent body is larger than a ratio of a maximum dimension in a width direction of the top sheet to a maximum dimension in a width direction of the absorbent body.
According to the invention of claim 4, since the ratio of the maximum dimension of the top sheet of the absorbent article to the maximum dimension of the absorbent body in the longitudinal direction (the maximum dimension of the top sheet in the longitudinal direction/the maximum dimension of the absorbent body in the longitudinal direction) is large compared to the ratio thereof in the width direction (the maximum dimension of the top sheet in the width direction/the maximum dimension of the absorbent body in the width direction), the top sheet extends longer in the longitudinal direction, and tends to have a shape that is longer in the longitudinal direction and that is larger in the longitudinal dimension of the absorbent article. By applying the present invention to such an absorbent article, the absorbent article can be easily detached from the individual packaging sheet.
[ solution 5]
The individually wrapped absorbent article according to claim 3 or 4, wherein the 2 nd adhesive portion that is in contact with the widthwise end portion release sheet is present in a plurality of divided portions, and the 2 nd adhesive portion that is present in a plurality of portions is arranged substantially parallel to each other along the longitudinal direction.
According to claim 5 of the present invention, the 2 nd adhesive portion that comes into contact with the widthwise end portion release sheet is present in a plurality of divided portions, and the 2 nd adhesive portions present in the plurality are present substantially parallel to each other along the longitudinal direction. In the individual package of an absorbent article according to claim 3 or 4 of the present invention, since the dimension in the longitudinal direction is easily longer than that of a normal individual package of an absorbent article in the unfolded state, the 2 nd adhesive part is arranged in a stripe shape extending in the longitudinal direction, and thus the absorbent article having a long dimension in the longitudinal direction is easily detached from the individual package sheet in the width direction.
Further, even if the widthwise end portion of the absorbent article is folded and bonded so that the 2 nd adhesive portion applied to the absorbent article is located inside after the absorbent article is detached from the widthwise end portion release sheet, the amount of adhesive applied to the portion of the 2 nd adhesive portion applied to the bond is relatively small, and therefore the folded adhesive portion of the absorbent article is easily detached, and as a result, the absorbent article is easily detached from the release sheet.
[ solution 6]
The individually wrapped absorbent article according to claim 5, wherein the total area of the 2 nd adhesive portions in contact with the widthwise end portion release sheet is 60% or less of the area of the widthwise end portion release sheet.
According to
[ solution 7]
The individually wrapped absorbent article according to any one of claims 1 to 6, wherein the rigidity of the release sheet is greater than the rigidity of the individually wrapped sheet.
According to the 7 th aspect of the present invention, when the absorbent article is detached from each of the release sheets by gripping at least a part of the individual package sheet and at least a part of the absorbent article, each of the release sheets is difficult to deform, and therefore, even if the absorbent article deforms, each of the release sheets is difficult to follow such deformation, and in addition, the peel strength of the 1 st adhesive portion is greater than the peel strength of the 2 nd adhesive portion, and is likely to remain on the individual package sheet side, so that the absorbent article is likely to detach from the individual package sheet and each of the release sheets.
[ solution 8]
The individually wrapped absorbent article according to any one of claims 1 to 7, wherein the outer edge in the longitudinal direction of the 2 nd adhesive portion that comes into contact with the longitudinal end release sheet constituting the 1 or more release sheets disposed at both ends in the longitudinal direction is disposed at the same position as or inside the outer edge in the longitudinal direction of the 1 st adhesive portion that comes into contact with the longitudinal end release sheet.
According to the 8 th aspect of the present invention, the outer edge in the longitudinal direction of the 2 nd adhesive portion which comes into contact with the release sheet disposed at both ends in the longitudinal direction, that is, the longitudinal direction end release sheet, is disposed at the same position as or inside the outer edge in the longitudinal direction of the 1 st adhesive portion which comes into contact with the longitudinal direction end release sheet, and therefore the absorbent article is easily detached from the separate packaging sheet and the release sheet in the longitudinal direction.
[ solution 9]
The individually wrapped absorbent article according to any one of claims 1 to 8, wherein the absorbent article has 1 or more folding lines extending in the longitudinal direction.
According to the 9 th aspect of the present invention, in general, when the absorbent article has 1 or more folding lines extending in the longitudinal direction, wrinkles extending in the longitudinal direction tend to remain in the unfolded state of the individual package, and therefore it is difficult to detach the absorbent article from the individual package sheet in the longitudinal direction. Thus, the absorbent article can be easily detached from the individual packaging sheet by applying the present invention.
[ solution 10]
The individually packaged absorbent article according to any one of claims 1 to 9, wherein the individually packaged absorbent article includes: a 1 st widthwise folding portion which is provided on one end side in the widthwise direction and is folded in the widthwise direction with a 1 st lengthwise folding line along the lengthwise direction as a base point; a 2 nd widthwise folded portion which is provided on the other end side in the widthwise direction and is folded in the widthwise direction with a 2 nd fold line in the lengthwise direction along the lengthwise direction as a base point; a 1 st longitudinal folded portion that is folded in the longitudinal direction with a 1 st fold line in the width direction as a base point, the 1 st and 2 nd longitudinal folded portions being provided at one end side in the longitudinal direction in a state where the 1 st and 2 nd longitudinal folded portions are folded; and a 2 nd longitudinal folded portion which is folded in the longitudinal direction with a 2 nd fold line in the width direction as a base point provided on the other end side in the longitudinal direction in a state where the 1 st and 2 nd longitudinal folded portions are folded, the individual package of the absorbent article including an adhesive tape having one end portion joined to a surface of a 2 nd end portion of the 1 st longitudinal folded portion and the other end portion joined to a surface of the 2 nd longitudinal folded portion, the 2 nd end portion being located on a side opposite to a 1 st end portion on the 1 st fold line side in the width direction of the 1 st longitudinal folded portion in the width direction, the 1 st longitudinal folded portion including: a pair of side portions located at both sides of the adhesive tape; and an intermediate portion that is located between the pair of side portions and that is in contact with at least one of the pair of side portions, the individually wrapped absorbent article further including reinforcing members that are respectively disposed on the pair of side portions.
When a user holds the individual package in the width direction with one hand, a force may be applied to the individual package from both ends in the width direction toward the center. In this case, when the magnitude of the applied force is too large, the individual package, particularly, both the 1 st longitudinal direction folded portion and the 2 nd longitudinal direction folded portion thereof may be deformed into a substantially concave shape along the shape of the palm. In this case, it may be difficult to smoothly pinch the pressure-sensitive adhesive tape. Therefore, in the present individual package, the reinforcing member is disposed at each of the pair of side portions located on both sides of the adhesive tape at the 1 st longitudinal direction folded portion. Therefore, when a force is applied to the 1 st longitudinal folded portion from both ends in the width direction toward the central portion, the side portions including the reinforcing member are less likely to be deformed, and the middle portion not including the reinforcing member is likely to be deformed. However, since the intermediate portion is fixed to the 2 nd longitudinally folded portion by the adhesive tape and is slightly difficult to deform, the portions near the boundaries between the pair of side portions and the intermediate portion are mainly deformed. Specifically, the portions of the 1 st longitudinal folded portion near the boundaries between the pair of side portions and the intermediate portion are deformed when viewed in the longitudinal direction, and the portions of the pair of side portions corresponding to the both end portions in the width direction of the individual package are raised from the intermediate portion to form a substantially V-shape. At this time, the 2 nd longitudinal folded portion is deformed in a substantially concave shape, but the portion on the outer side in the width direction is less raised. Therefore, gaps are generated between the 2 nd longitudinal folded portion and the pair of side portions, respectively. When these gaps are formed, the user inserts a finger into any of the gaps naturally, pinches the side portion, and pulls the side portion away from the 2 nd lengthwise folded portion, thereby attempting to peel the adhesive tape. Here, since the pair of side portions include the reinforcing member, the force to be pulled can be easily transmitted to the adhesive tape. Thus, the user can easily open the individual package by inserting a finger into the gap, pinching the side portion, and peeling the adhesive tape. That is, it is possible to provide an individual package of an absorbent article which can be easily opened even when the individual package is held with one hand and opened with the other hand. Therefore, the individual package has the following features: the absorbent article can be easily opened with one hand and easily detached from the individual packaging sheet after opening, and therefore can be extremely easily handled at the start of use and quickly worn.
< embodiment 1 >
Hereinafter, embodiment 1 of an individual package of an absorbent article (hereinafter, also simply referred to as "individual package") according to the present invention will be described in detail with reference to the drawings. In the present specification, unless otherwise specified, "viewing an object (for example, an individual package, an absorbent article, or the like) placed on a horizontal plane from above in the vertical direction in the thickness direction of the object" will be simply referred to as "looking down".
[ various definitions ]
The various directions and the like used in the present specification are as follows unless otherwise specified.
In the present specification, "longitudinal direction" means "a direction in which the length of a long object (for example, an individual package, an absorbent article in an unfolded state, various constituent members of the absorbent article, or the like) is long in a plan view", "width direction" means "a direction in which the length of the long object is short in a plan view", "thickness direction" means "a direction perpendicular to the object placed on a horizontal plane in an unfolded state", and these directions are in a mutually orthogonal relationship.
In the present specification, the "end portion" in the longitudinal direction or the width direction means "a portion in which each end of an object (for example, an individual package, an absorbent article in an unfolded state, various components of the absorbent article, or the like) in the longitudinal direction or the width direction is within 33% in a plan view.
In the present specification, the "axis line extending in the longitudinal direction and located at the center in the width direction of the vertically long object" is referred to as a "central axis line in the longitudinal direction", and the "axis line extending in the width direction and located at the center in the longitudinal direction of the vertically long object" is referred to as a "central axis line in the width direction".
In the present specification, the term "one side in the longitudinal direction of the absorbent article which is the side in the longitudinal direction that is the proximal side with respect to the abdomen of the wearer when the wearer wears the absorbent article" is referred to as "the front side of the absorbent article", and the term "the other side in the longitudinal direction of the absorbent article which is the side in the distal direction with respect to the abdomen of the wearer when the wearer wears the absorbent article (i.e., the side in the proximal direction with respect to the back of the wearer)" is referred to as "the rear side of the absorbent article".
In the present specification, unless otherwise specified, in the thickness direction of the absorbent article in the developed state, "the surface located on the proximal side with respect to the skin surface of the wearer when the absorbent article is worn" is referred to as "skin-facing surface", and "the surface located on the distal side with respect to the skin surface of the wearer when the absorbent article is worn" is referred to as "non-skin-facing surface".
In the present specification, the term "user" includes not only a person who actually wears the absorbent article (i.e., a wearer), but also a person who wears the absorbent article on another person (e.g., a caregiver).
[ Individual Package ]
In the
As shown in fig. 1 (a), the individually packaged
The
Hereinafter, the absorbent article that can be used in the individual package of the present invention will be described in further detail using the sanitary napkin 1.
[ absorbent article ]
FIG. 2 is a view taken along the thickness direction D from the
The peel strength in the present specification is a peel strength measured by using a tensile tester "5543" (made by instron corporation) with a tensile speed of 100mm/min from 10mm to 20mm between chucks and with the width of a test piece being a product width. More specifically, the peel strength between the release sheet and the individual packaging sheet is the peel strength measured by sandwiching the width direction end of the release sheet between one chuck and sandwiching the width direction end of the individual packaging sheet between the other chuck, and the peel strength between the absorbent article and the release sheet is the peel strength measured by sandwiching the width direction end of the absorbent article between one chuck and sandwiching the width direction end of the release sheet between the other chuck.
In the present invention, the outer shape of the absorbent article is not limited to the specific width direction DWCentral axis C ofWTo the front side DFThe end portion of (2) may have a shape of a
In the above aspect, the absorbent article can be easily detached from the individual package sheet starting from the wide portion by adjusting the positional relationship between the 1 st adhesive portion and the 2 nd adhesive portion.
FIG. 4 is a longitudinal direction D of the sanitary napkin 1LCentral axis C extending upwardlyLCross-sectional view of a cross-section of (a). As shown in fig. 4, the sanitary napkin 1 includes, as main constituent members: a liquid-permeable
Further, as shown in fig. 2, the sanitary napkin 1 is provided with a slit in the width direction DWAre respectively arranged along the length direction DLA pair of extended side panels 5, 5. Further, as shown in fig. 3, the sanitary napkin 1 is disposed on the non-skin-facing surface S of the back sheet 3BThe sanitary napkin includes a fixing adhesive section as the 2 nd adhesive section of the present invention, which detachably fixes the sanitary napkin 1 to the other surface of each of the plurality of release sheets. More specifically, the constituent members include: a clothes fixing
As shown in fig. 2, the sanitary napkin 1 includes, in plan view: front end imaginary line LE1So as to pass through the foremost side D of the sanitary napkin 1FIs arranged along the width direction DWExtending; and rear end imaginary line LE2So as to pass through the rearmost side D of the sanitary napkin 1BIs arranged along the width direction DWAnd (4) extending. The sanitary napkin 1 has an imaginary line LE at the front end1And rear end imaginary line LE2Has the following components: a
Further, as shown in fig. 2 and 4, the
In addition, the
As shown in fig. 2, the sanitary napkin 1 includes, in plan view: length direction 1 st fold line LW1(imaginary line) and the 2 nd fold line LW in the length direction2(imaginary line) along the longitudinal direction DLExtended in the width direction D of the sanitary napkin 1WCarrying out three-fold; 1 st fold line LL in width direction1(imaginary line) and the 2 nd fold line LL in the width direction2(imaginary line) along the width direction DWIs extended for making the sanitary napkin 1 in the longitudinal direction DLAnd carrying out three-fold. The sanitary napkin 1 is attached to the
When worn, the sanitary napkin 1 configured as above is put on the non-skin-facing surface SBThe sanitary napkin 1 is attached to the inner surface of clothing (e.g., underwear) of a wearer by the clothing-
In the present invention, the provision of the pair of wing portions is not an essential constituent element, and therefore, such wing portions may not be necessary depending on the form of the absorbent article and the like.
Hereinafter, various components of the absorbent article that can be used in the individual package of the present invention will be described in further detail with reference to the sanitary napkin 1.
[ surface sheet ]
In the sanitary napkin 1, as shown in fig. 2 and 4, the
The liquid-permeable sheet-like member is not particularly limited as long as it has various properties (for example, liquid permeability, skin touch, flexibility, strength, and the like) that can be used as a top sheet of an absorbent article, and various nonwoven fabrics such as a hot air nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, and a point-bond nonwoven fabric, and a porous resin film, for example, can be used. The sheet-like member is not particularly limited in structure, and various sheet-like structures such as a flat sheet-like structure having a plurality of openings and a concavo-convex structure can be used in addition to a flat non-porous sheet-like structure.
When a nonwoven fabric is used as the surface sheet, the type of the constituent fibers is not particularly limited, and examples thereof include hydrophilic fibers such as cellulose-based fibers and hydrophilic thermoplastic resin fibers (e.g., hydrophilic olefin-based resins, hydrophilic polyester-based resins, etc.) subjected to a hydrophilization treatment. These fibers may be used alone, or 2 or more kinds of fibers may be used in combination.
In the present invention, the outer shape, various dimensions, basis weight, and the like of the top sheet can be any outer shape, various dimensions, basis weight, and the like corresponding to desired liquid permeability, skin touch, flexibility, and the like.
[ absorbent body ]
In the sanitary napkin 1, as shown in fig. 2, the absorbent body 4 has a vertically long outer shape in plan view as follows: the sanitary napkin 1 has a substantially central portion in the longitudinal direction D, which is substantially centered in the region where the pair of
The water-absorbent member is not particularly limited as long as it can absorb and retain liquid excreta such as menstrual blood discharged from the wearer, and any water-absorbent member known in the art can be used. Examples of such a water-absorbent member include a water-absorbent member in which at least one absorbent core made of an arbitrary water-absorbent material is covered with a hydrophilic core covering sheet such as tissue paper. Examples of the water-absorbent material constituting the absorbent core include hydrophilic fibers, high-absorbent polymers, and the like, and more specifically, cellulose fibers such as ground pulp, cotton, rayon, and acetate; a granular material comprising a high-absorbency polymer such as a sodium acrylate copolymer; and mixtures thereof, and the like.
In addition, the sanitary napkin 1 has the
(longitudinal direction D of surface sheet 2)LMaximum dimension of (2)/longitudinal direction D of the absorbent body 4LMaximum size of (1)>(width direction D of surface sheet 2)WMaximum dimension of/width direction D of absorbent body 4WMaximum size of (1)
The topsheet in the above formula is a single sheet that comes into contact with the excretory opening of the wearer when the absorbent article is worn, and the absorbent body is a single absorbent body that overlaps the excretory opening contact region of the absorbent article in the thickness direction. Accordingly, the size of the
The
In the present invention, the outer shape, various sizes, unit area weight, and the like of the absorbent body can be any outer shape, various sizes, unit area weight, and the like corresponding to desired absorption performance, flexibility, strength, and the like.
[ Back sheet ]
In the sanitary napkin 1, as shown in fig. 3 and 4, the back sheet 3 has a shape extending from the front end to the rear end in the longitudinal direction of the sanitary napkin 1 and extending from the width direction D of the sanitary napkin 1 in plan viewWThe one end of the first and second side portions extends to the other end of the second side portion. As shown in fig. 4, the back sheet 3 is arranged in the thickness direction D of the sanitary napkin 1TIs arranged at a position on the non-skin-facing surface side, and forms a non-contact surface facing the skin surface of the wearer (i.e., the non-skin-facing surface S of the sanitary napkin 1)B) Is formed of the liquid-impermeable sheet-like member of (1).
The liquid-impermeable sheet-like member is not particularly limited as long as it has liquid-impermeability to the extent that it can prevent at least permeation of liquid excreta discharged from the wearer, and for example, a hydrophobic nonwoven fabric formed of thermoplastic resin fibers (for example, polyolefin resin fibers such as polyethylene and polypropylene, polyester resin fibers such as polyethylene terephthalate, and various composite fibers such as sheath-core type fibers) can be used; a hydrophobic resin film made of a thermoplastic resin such as a polyolefin resin; a laminate in which a nonwoven fabric is bonded to the resin film; a laminated nonwoven fabric such as SMS nonwoven fabric. The sheet-like member is not particularly limited in structure, and various sheet-like structures such as a flat sheet-like structure having a plurality of openings for maintaining a predetermined liquid-tight property and ensuring air permeability, and an uneven structure, for example, may be employed in addition to the flat non-porous sheet-like structure.
In the present invention, the shape, various sizes, basis weight, and the like of the back sheet can be any shape, various sizes, basis weight, and the like according to desired leakage-proof performance, air permeability, and the like.
[ side sheet ]
In the sanitary napkin 1, as shown in fig. 2, the pair of side sheets 5 and 5 are formed from a sheet material which is formed in the width direction D of the sanitary napkin 1 in plan viewWAre respectively arranged along the length direction DLA pair of extended band-shaped sheet members. The pair of side sheets 5, 5 are arranged in the thickness direction D of the sanitary napkin 1TIs arranged at a position on the skin-facing surface side, and forms the skin-facing surface S of the sanitary napkin 1 together with the
The pair of side sheets 5, 5 have a width direction DWThe outer side end of the back sheet 3 is joined to the skin-facing surface of the back sheet 3 to form a fixed end, and the width direction DWThe center side end of (2) is not joined to any component member such as the
The belt-shaped sheet member used as the side sheet is not particularly limited as long as it has various characteristics (for example, liquid impermeability (leakage resistance), skin touch, flexibility, strength, and the like) that can be used as the side sheet of the absorbent article, and for example, a sheet member obtained by cutting a liquid impermeable sheet member (that is, a sheet member such as a hydrophobic nonwoven fabric or a hydrophobic resin film) similar to the back sheet into a belt shape can be used.
In the present invention, the side sheet can have any shape, dimensions, basis weight, and the like according to the desired leakage-proof property, skin touch, flexibility, and the like.
In the present invention, the provision of the pair of side sheets is not an essential constituent element, and therefore, such side sheets may not be necessarily provided depending on the form of the absorbent article and the like.
[ functional layer ]
In the sanitary napkin 1, as shown in fig. 2, the
The sheet-like member forming the
In the present embodiment, the base material capable of holding the functional agent is not particularly limited as long as it can hold the functional agent in a liquid or solid state, and examples thereof include a fabric (e.g., a nonwoven fabric, a woven fabric, a knitted fabric, etc.), a porous resin sheet (e.g., a sponge sheet, etc.), and the like. The substrate may be used alone as a substrate for the functional layer, or may be used in combination with other constituent members (for example, a front sheet, a back sheet, an intermediate sheet, a core wrap sheet, and the like).
In addition, when the functional agent itself has a predetermined shape retention property or the like, and the functional agent is disposed alone at a predetermined position of the absorbent article and can exert a predetermined function, the functional layer may not have a base material.
(functional agent)
In addition, in the sanitary napkin 1, the temperature sensitive agent used as the functional agent includes: a temperature-sensitive component which does not generate heat by itself but stimulates a temperature-sensitive receptor of the skin of the wearer to make the wearer feel temperature; and a solvent component which dissolves the temperature sensitive component. In the sanitary napkin 1, the temperature sensitive agent is contained in substantially the entire
In order to prevent volatilization or migration to other areas before the sanitary napkin 1 is used, the functional agent may also be protected in a water-disintegrable protective member such as microcapsules. The functional agent encapsulated in the microcapsule disintegrates when contacted with a liquid (exemplified by menstrual blood, urine, and sweat), and releases the functional agent to the outside. The discharged functional agent is vaporized by the body temperature of the wearer or the like, or comes into contact with the skin of the wearer, thereby exerting a predetermined function on the wearer.
Examples of the raw material of the microcapsule include: a saccharide; examples of the polysaccharide include monosaccharides (e.g., glucose), disaccharides (e.g., sucrose), and polysaccharides (e.g., dextrin, glucomannan, sodium alginate, and water-soluble starch); gelatin; and water-soluble polymers (for example, polyvinyl alcohol and polyvinyl acetate).
The microcapsules are commercially available, and examples thereof include INCAP (trademark) commercially available from Symrise (Dekkaiber). In addition, the microcapsules can be produced, for example, as follows: the raw material of the microcapsule is dissolved in water to form an aqueous solution, and the functional agent and the surfactant are mixed in the aqueous solution, and the mixture is dried under reduced pressure while spraying the aqueous solution.
In the sanitary napkin 1, even if the
By thus warming the lower abdomen of the wearer, that is, the portion close to the uterus of the wearer, it is expected to alleviate dysmenorrhea of the wearer, or alleviate symptoms such as premenstrual syndrome, cold intolerance, climacteric disorder, and the like.
In addition, the
The temperature-sensitive component contained in the temperature-sensitive agent is preferably a plant-derived compound from the viewpoint of making the wearer feel comfortable, and examples thereof include capsaicin, vanillyl alcohol alkyl ether derivatives (e.g., vanillyl ether, vanillyl alcohol butyl ether, vanillyl alcohol pentyl ether, vanillyl alcohol hexyl ether, etc.), ginger extract, ginger oil, and the like. Among these compounds, vanillyl alcohol alkyl ether derivatives, ginger extract, ginger oil and the like are preferably used from the viewpoint of skin irritation. These compounds may be used alone, or 2 or more of them may be used in combination.
When the temperature sensitive agent is applied to a substrate by coating or the like, a solvent component capable of dissolving or dispersing the temperature sensitive component may be used together with the temperature sensitive component, and examples of such a solvent component include a lipophilic solvent and a hydrophilic solvent.
Examples of the lipophilic solvent include oils and fats such as natural oils (e.g., fatty acid esters such as triglycerides, coconut oil, linseed oil, and the like), hydrocarbons (e.g., paraffin, and the like). On the other hand, examples of the hydrophilic solvent include water and alcohols, and examples of the alcohols include lower alcohols (e.g., methanol, ethanol, ethylene glycol, and glycerol), and higher alcohols (e.g., octanol and lauryl alcohol).
Among these solvents, lipophilic solvents such as fats and oils or alcohols are preferably used in terms of ease of control of volatility, and lipophilic solvents such as fats and oils are more preferably used in terms of ease of maintenance of absorption performance of the absorbent article.
After the application of such a solvent to the substrate, the solvent may remain in the application target site in a state of being cured or semi-cured, or the solvent may be volatilized and only the solute may remain.
In addition, from the viewpoint of the temperature-sensitive effect, the concentration of the temperature-sensitive component in the case where the temperature-sensitive agent contains a solvent is preferably 0.0001% by mass or more and 5.0% by mass or less, more preferably 0.0005% by mass or more and 3.0% by mass or less, and still more preferably 0.1% by mass or more and 1.0% by mass or less.
In the present invention, the functional agent is not limited to the temperature sensitive agent, and any functional agent can be used according to the desired action. Examples of such functional agents include a cold feeling agent, a heat generating agent, and a drug (e.g., a skin astringent, an anti-inflammatory agent, an antibacterial agent, a pH adjuster, and a humectant). These functional agents may be used in combination, for example, such that 1 kind of functional agent (e.g., a temperature sensitive agent) is disposed in a part of the functional layer and another kind of functional agent (e.g., a cooling agent) is disposed in another part in a plan view.
In the present invention, the cooling agent usable as the functional agent includes a cooling component which does not absorb heat by itself but stimulates the skin of the wearer to make the wearer feel cool, and may include a solvent component which dissolves or disperses the cooling component as necessary. Examples of the cooling component include menthol (e.g., l-menthol); menthol derivatives (e.g., menthyl lactate, menthyl glycerol ether, etc.); methyl salicylate; essential oils derived from plants such as peppermint and eucalyptus. The solvent component that may be contained in the cooling agent may be the same as the solvent component that may be contained in the temperature-sensitive agent.
In addition, in the case where the cooling agent contains a solvent, the concentration of the cooling component in the cooling agent is preferably 0.0001% by mass or more and 5.0% by mass or less, more preferably 0.0005% by mass or more and 3.0% by mass or less, and further preferably 0.1% by mass or more and 1.0% by mass or less, from the viewpoint of the cooling effect.
In the present invention, the heat generating agent that can be used as the functional agent has an effect of warming the skin of the wearer by its own heat generation. Examples of such a heat generating agent include heat generating agents utilizing chemical properties such as the heat of oxidation of metal powder such as iron powder, the heat of neutralization with an acid or an alkali, and the heat of hydration of inorganic salts. The heat generating agent may be used by being dissolved or dispersed in a solvent component or a dispersion medium.
In the present invention, the drug that can be used as the functional agent imparts a predetermined pharmacological action to the skin of the wearer, and examples thereof include a skin astringent, an anti-inflammatory agent, an antibacterial agent, a pH adjuster, a moisturizing agent, and the like.
Examples of the skin astringent include skin astringent containing astringent components such as zinc oxide, aluminum sulfate, tannic acid, and oil-soluble polyphenols (e.g., phellodendron extract, Hypericum erectum extract, Chamomilla extract, birch extract, loquat leaf extract, linden extract, and hop extract).
Examples of the anti-inflammatory agent include anti-inflammatory agents containing anti-inflammatory components derived from natural sources (e.g., peony extract, hypericum erectum extract, chamomile extract, mugwort extract, perilla extract, etc.), synthetic anti-inflammatory components (e.g., allantoin, dipotassium glycyrrhizinate, etc.), and the like.
Examples of the antibacterial agent include antibacterial agents containing antibacterial components derived from natural sources (e.g., phellodendron extract, olive leaf extract, chamomile extract, Sasa albo-marginata extract, zanthoxylum extract, perilla extract, houttuynia cordata extract, hops extract, eucalyptus extract, mugwort extract, etc.), synthetic antibacterial components (e.g., ethylhexylglycerin, etc.), and the like.
Examples of the pH adjuster include pH adjusters containing weakly acidic components for keeping skin weakly acidic, such as malic acid, succinic acid, citric acid, tartaric acid, and lactic acid.
Examples of the moisturizer include moisturizers containing a moisturizing component such as a polyhydric alcohol (e.g., glycerin, propylene glycol, butylene glycol, sorbitol), urea, and an emollient component (e.g., petrolatum).
In the present invention, the content (weight per unit area) of the functional agent in the functional layer can be a predetermined content corresponding to the kind of the functional agent, the arrangement position of the functional layer, and the like. For example, in the case where a temperature sensitive agent or a cooling agent is used as the functional agent and the functional layer is disposed in the same manner as in the sanitary napkin 1, the weight per unit area of the temperature sensitive component or the cooling component which is the active ingredient of the functional agent may preferably be 0.001g/m2Above and 10g/m2Hereinafter, more preferably 0.003g/m2Above and 5g/m2The amount of the surfactant is more preferably 0.01g/m or less2Above and 2.5g/m2The following weights per unit area are included in the functional layer.
In the present invention, the functional layer may have any shape, dimensions, basis weight, and the like according to the type, arrangement, and the like of the functional agent. The property of the functional agent is not particularly limited, and for example, the functional agent may be a solution-like functional agent containing an active ingredient, may be a solid-like component that can be applied, may be composed of a liquid-like active ingredient, or may be a volatile component.
The colorant used for coloring the functional layer is not particularly limited, and any colorant known in the art (for example, pigment, dye, etc.) can be used. The coloring means based on the colorant is not particularly limited, and the functional layer may be colored by applying or printing a colorant, or may be colored by including a colorant in a constituent component of the functional layer, for example.
[ adhesive part for fixation ]
As described above, as shown in FIG. 3, the sanitary napkin 1 is disposed on the non-skin-facing surface S of the back sheet 3BHas a plurality of fixing adhesive parts as the 2 nd adhesive part. More specifically, the method comprises: a clothes fixing
The front
The total area of the front side
As the adhesive used for such a fixing adhesive portion, any adhesive known in the art can be used, and examples thereof include pressure-sensitive adhesives mainly composed of styrene-based copolymers such as styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene-styrene (SBS), and styrene-isoprene-styrene (SIS). By using these adhesives in the fixing adhesive parts, the sanitary napkin 1 can be detachably fixed to clothing, various release sheets, and the like.
In the present invention, the arrangement, the shape, the various sizes, and the like of the 2 nd adhesive part may be any arrangement, shape, various sizes, and the like in consideration of ease of fixing to the clothes.
[ independent packaging sheet ]
Fig. 1 is a perspective view of an
The
The sheet-like member that can be used as the individual packaging sheet is not particularly limited, and for example, a resin sheet, a nonwoven fabric, or the like can be used. Among these, from the viewpoint of airtightness of the individual package, a resin sheet is preferably used, and a resin sheet made of a polyolefin resin such as polyethylene or polypropylene is more preferably used. The resin sheet may have a single-layer structure or a multilayer laminated structure, and may have a barrier layer made of an ethylene-vinyl alcohol copolymer (EVOH) resin or the like.
In the present invention, the individual packaging sheet may have any shape, size, weight per unit area, and the like in consideration of packaging easiness, airtightness, and the like.
[ Release sheet ]
In the above embodiment, as shown in fig. 3, the
In the present embodiment, the rigidity of each release sheet is relatively large compared to the rigidity of the
Each of the release sheets described above is fixed to the
The front side
In the present invention, the positional relationship between the 1 st adhesive portion and the 2 nd adhesive portion is not limited to the above-described relationship, and the peel strength when the width direction end portion peel sheet is peeled from the individual package sheet in the width direction can be appropriately adjusted within a range larger than the peel strength when the absorbent article is peeled from the width direction end portion peel sheet in the width direction. In the present invention, in order to make the peel strength when the release sheet is peeled from the individual packaging sheet larger than the peel strength when the absorbent article is peeled from the release sheet, the adhesive force of the adhesive applied to the 1 st adhesive part may be made relatively large compared to the adhesive force of the adhesive applied to the 2 nd adhesive part by appropriately changing the type, application amount, application area, and the like of the adhesive applied to the 1 st adhesive part and the adhesive applied to the 2 nd adhesive part. For example, the adhesive applied to the 1 st adhesive part may have a higher adhesive strength than the adhesive strength applied to the 2 nd adhesive part, the amount of the adhesive applied to the 1 st adhesive part may be larger than the amount of the adhesive applied to the 2 nd adhesive part, or the area of the adhesive applied to the 1 st adhesive part may be larger than the area of the adhesive applied to the 2 nd adhesive part. Further, the release sheet may be subjected to release treatment only on the other surface thereof to which the 2 nd adhesive portion is applied, without being subjected to release treatment on the one surface thereof to which the 1 st adhesive portion is applied.
[ adhesive tape ]
In the above embodiment, as shown in fig. 1 (a) and 2, the
As the tape member used for the pressure-
In the present invention, the adhesive tape may be disposed in any manner, in which the strength, the ease of opening, and the like required for the adhesive tape are taken into consideration, such as in terms of the configuration, the shape, and the various dimensions.
In the present invention, since the provision of such an
[ method of Forming Individual Package ]
Hereinafter, a method of folding the absorbent article to form the individual package of the present invention (i.e., a method of forming the individual package) will be described in detail with reference to the drawings. Fig. 5 is a perspective view for explaining a folding method of the sanitary napkin 1 for forming the
The sanitary napkin 1 in the unfolded state shown in fig. 5 (a) can be used in the longitudinal direction D as shown in fig. 5 (b)LExtended lengthwise 1 st fold line LW1And a 2 nd fold line LW in the length direction2On the skin-facing surface SFTo form an inner side along the width direction DWAfter being folded into three, as shown in fig. 5 (c) and 5 (D), respectively, in the width direction DWExtended width direction 1 st fold line LL1And a 2 nd fold line LL in the width direction2On the skin-facing surface SFTo form an inner side along the length direction DLFolded into three, thereby forming the
When the sanitary napkin 1 is folded, the sanitary napkin 1 is fixed to the non-skin-facing surface SBThe
In the present invention, the folding method of the absorbent article for forming the individual package is not limited to the embodiment described above, and any folding method can be adopted in consideration of the compactness of the individual package, the ease of opening, and the like.
[ detachment method for detaching absorbent article from individually wrapped body ]
The method of separating the sanitary napkin 1 from the individual package of the sanitary napkin 1 according to the present embodiment differs depending on the user, but the sanitary napkin 1 includes the
First, the individually packaged
After one wide-width-
<
Hereinafter,
Here, the
The
In the individually packaged
The intermediate portion 61 is in the width direction DWIs located between the pair of side portions 63, 63 and extends along the longitudinal direction DLAnd (4) extending. The intermediate portion 61 is in the width direction DWHas the same size as the
In the present embodiment, the pair of side portions 63, 63 have higher rigidity than the intermediate portion 61. In other words, the middle portion 61 can be said to be a region of relatively low rigidity in the region between the pair of side portions 63, 63. Therefore, in the width direction DWOf the independent packaging body 10 (the 1 st longitudinal folded part A of)1) When a force is applied, the side portions 63 are less likely to deform, and the middle portion 61 is more likely to deform. Therefore, the width direction D can be released so that the pair of side portions 63, 63 deform relatively little and the middle portion 61 deforms relatively muchWThe force of (c). Further, since the intermediate portion 61 may be present in a region between the pair of side portions 63, 63 as a region having relatively low rigidity, it is not necessary to provide the intermediate portion in the width direction DWIs present as long as it is present in the width direction DWA partial region of (a) may be sufficient.
In the present embodiment, the 1 st widthwise folded part B1And a widthwise central portion BCIn the width direction D ofWIs laminated on the side part 63 of one side in the thickness direction T, the 2 nd widthwise folded part B2And a widthwise central portion BCIn the width direction D ofWThe other side portion of (b) is laminated on the other side portion 63 in the thickness direction T. Therefore, as shown in fig. 7 and the like, the wide-width-
Next, the function of the individually packaged
Therefore, in the sanitary napkin 1, the folded portion A is folded in the 1 st longitudinal direction1The rigidity of each of the pair of side portions 63, 63 located on both sides of the
However, the intermediate portion 61 is fixed to the 2 nd longitudinal folded portion a by the
Here, the side portion 63 is relatively high in rigidity (or hardly deformed), but the side portion 63 as a whole need not be high in rigidity as long as the rigidity is locally high. The area of the region of the side portion 63 having high rigidity (or being difficult to deform) is 30% or more of the entire area of the side portion 63 in plan view, and is preferably 30% or morePreferably 40% or more, more preferably 50% or more, and still more preferably 60% or more. In addition, in consideration of the range of arrangement of the finger to which the force K is applied, the side portion 63 has a region with high rigidity (or is difficult to deform) in the longitudinal direction D in plan viewLThe dimension (D) can be listed as the longitudinal direction D of the side part 63LIs 30% or more, preferably 40% or more, more preferably 50% or more, and further preferably 60% or more. In addition, from the viewpoint of resistance to the force K, the width direction D of the region where the rigidity of the side portion 63 is high (or is hard to deform) in plan viewWThe dimension (D) can be listed as the width direction D of the side part 63WIs 60% or more, preferably 70% or more, more preferably 80% or more, and further preferably 90% or more.
On the other hand, the intermediate portion 61 is low in rigidity (or easily deformed), but the entire region between the pair of side portions 63, 63 does not need to be low in rigidity as long as the rigidity is locally low. The area of the region having low rigidity (or easily deformable) in the region between the pair of side portions 63, 63 is 40% or more, preferably 50% or more, more preferably 60% or more, and even more preferably 70% or more of the entire area of the region between the pair of side portions 63, 63 in a plan view. Further, from the viewpoint that the intermediate portion 61 functions as a kind of folding line, the longitudinal direction D of the region between the pair of side portions 63, which has low rigidity (or is easily deformed), is viewed in planLThe maximum dimension of (2) can be listed as the longitudinal direction D of the side part 63LIs 60% or more, preferably 70% or more, more preferably 80% or more, and further preferably 90% or more. Further, from the viewpoint that the intermediate portion 61 functions as a kind of folding line, the width direction D of the region between the pair of side portions 63, 63 in which the rigidity is low (or easily deformed) is taken in a plan viewWThe maximum dimension of (2) can be enumerated as the width direction D of the entire region between the pair of side portions 63, 63WIs 10% or more, preferably 20% or more, more preferably 30% or more, and further preferably 40% or more.
As a method of relatively increasing the rigidity (or the degree of difficulty of deformation) of each of the pair of side portions 63, as described above, the following method may be mentioned: the side portion 63 is formed of a relatively large number of layers by adding layers not included in the intermediate portion 61 (exemplified by at least the wide-width
The comparison of the rigidity (or the difficulty of deformation) between the side portions 63 and the intermediate portion 61 can be performed by comparing the measurement results of the pushing force described below. The press-in force is measured as the magnitude of a load required when a predetermined jig is pressed into a substantially plate-shaped sample by a predetermined distance in the thickness direction. The larger the pressing force is, the more difficult the deformation is, and thus the higher the rigidity can be said to be. The device for measuring the insertion force comprises: a sample stage; a hole portion extending inward from an upper surface of the sample stage; a fixing member for fixing the sample to an upper surface of the sample stage; a cylindrical jig which is disposed above the sample stage and which can pass through the hole; and a digital load cell for measuring a load applied to the jig. The measurement method is a method of measuring a load applied to a jig when the jig is lowered from above the sample toward the hole by placing the sample on the upper surface of the sample stage so that the hole is covered with the measurement target region, fixing the sample by a fixing member, and moving down the jig from above the sample toward the hole. The measurement method is specifically performed as follows.
(1) Cut to lengthDirectional 1 th fold line LW1And a 2 nd fold line LW in the length direction2At the 1 st longitudinal folded part A1As a sample. For example, the 1 st longitudinal folded part A of the sample is folded in a plurality of rectangular measurement target regions having a 2mm square1And (5) dividing.
(2) So that the plane direction (longitudinal direction D) of the sampleLAnd the width direction DW) The sample is placed on the upper surface of the sample stage so as to be parallel to the upper surface of the sample stage and fixed by a fixture, wherein a hole (diameter: 20mm, ×, depth: 10mm) extending inward from the upper surface of the sample stage substantially perpendicularly is formed in the sample stage.
(3) The sample stage is set on the stage (the sample stage may be set on the stage in advance). The table includes a columnar member extending upward in the vertical direction. A digital force gauge (FGP-5: manufactured by NIDEC-SHAPO, Japan) having a cylindrical jig (diameter: 2 mm. times.length: 100mm) connected to the tip of a probe was attached to the columnar member. The jig is disposed above the hole of the sample stage in the vertical direction so that the distal end of the jig contacts the measurement target region of the sample. At this time, the jig moves perpendicularly to the plane direction of the sample, and the sample can be pushed in the thickness direction T.
(4) The jig was moved vertically downward at a speed of 30mm/min to press the region to be measured of the sample by 1mm in the thickness direction T. The maximum load (N) measured by the digital force gauge at this time was recorded.
(5) A folded part A in the 1 st longitudinal direction1In (2), the measurement target region is sequentially changed, and the measurements (1) to (4) are repeated to the 1 st longitudinal folded part A1The measurement was performed as a whole.
(6) The measurements (1) to (5) were repeated for N different samples (N is a natural number of 3 or more), and the average value of these measurements was used as the pushing force.
The rigidity (or the degree of difficulty of deformation) of the side portions and the intermediate portion can be compared with each other depending on the number and types of layers included in the side portions and the intermediate portion. For example, the side portion 63 includes layers not included in the intermediate portion 61 (exemplified by the front side
In another embodiment, the reinforcing member (exemplified by the
The absorbent article of the individual package of the present invention is not limited to the sanitary napkin of the above-described embodiments, and can be applied to various absorbent articles such as pantiliners, incontinence pads, breast pads, disposable diapers, and the like.
The individual packages of the present invention are not limited to the above-described embodiments, and the individual packages may be appropriately combined, substituted, or modified without departing from the object and spirit of the present invention. In the present specification, ordinal numbers such as "1 st", "2 nd", etc. are used to distinguish items to which the ordinal numbers are added, and do not refer to the order, priority, importance, etc. of the items.
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