阅读说明：本技术 连结式一次性穿着物品 (Connected disposable wearing article ) 是由 冈田友记 古川勉 于 2020-01-27 设计创作，主要内容包括：[课题]降低具有目标片的区域中的闷热。[解决手段]上述课题通过下述连结式一次性穿着物品得以解决,该连结式一次性穿着物品的特征在于,腹侧部分(F)中的具有目标片(20)的部分在从目标片(20)至不透液性片(11)的背面的厚度方向上的范围具有微纤维状纤维素聚集体(22)的附着部(23),腹侧部分(F)中,除了具有目标片(20)的部分以外,不具有微纤维状纤维素聚集体(22),微纤维状纤维素聚集体(22)能够吸收位于比目标片(20)更靠表侧的位置的湿气。([ problem ] to reduce stuffiness in a region having a target sheet. The aforementioned problem is solved by a connected disposable wearing article characterized in that a portion of the abdomen-side portion (F) having a target sheet (20) has an attachment portion (23) of a microfibrous cellulose aggregate (22) in the range in the thickness direction from the target sheet (20) to the back surface of the liquid-impermeable sheet (11), the abdomen-side portion (F) does not have the microfibrous cellulose aggregate (22) except for the portion having the target sheet (20), and the microfibrous cellulose aggregate (22) can absorb moisture located on the front side of the target sheet (20).)

1. A connected disposable wearing article having: a crotch portion including a front-rear direction center; a ventral portion extending from the front-rear direction toward the center to the front side; and a back side portion extending from the front and rear to the center to the rear,

the connected disposable wearing article has:

an absorber interposed in a range including the crotch portion;

a liquid-permeable top sheet provided on the front side of the absorber;

a liquid-impermeable sheet that is provided on the back side of the absorbent body and has air permeability; and

an outer nonwoven fabric covering the back side of the liquid-impermeable sheet and constituting the outer surface of the product,

a connecting part detachably connected with the outer surface of the abdomen side part is arranged on both sides of the back side part,

a target sheet is provided at a joining position of the joining portion in the abdominal portion,

the connected disposable wearing article is characterized in that,

the part of the abdomen-side portion having the target sheet has an attached part of a microfibrous cellulose aggregate over a range in the thickness direction from the target sheet to the back surface of the liquid-impermeable sheet,

the ventral portion, except for the portion having the target sheet, does not have the microfibrous cellulose aggregates,

the microfibrous cellulose aggregate can absorb moisture at a position on the surface side of the target sheet.

2. The connected disposable wearing article according to claim 1, wherein,

the connecting part is a hook part,

the target sheet is a nonwoven fabric bonded to the outer surface of the outer nonwoven fabric,

the microfibrous cellulose aggregates are adhered to the nonwoven fabric of the target sheet, and the amount of adhesion of the microfibrous cellulose aggregates in the nonwoven fabric of the target sheet decreases from the front side toward the back side of the target sheet.

3. The connected disposable wearing article according to claim 1, wherein,

the connecting part is a hook part,

the target sheet is a nonwoven fabric bonded to the outer surface of the outer nonwoven fabric,

the microfibrous cellulose aggregate is adhered to the nonwoven fabric of the target sheet, and the adhering portion of the microfibrous cellulose aggregate does not have the microfibrous cellulose aggregate exposed to the outer surface of the target sheet.

4. A connected disposable wearing article according to any one of claims 1 to 3,

the connecting part is a hook part,

the target sheet is a nonwoven fabric bonded to the outer surface of the outer nonwoven fabric,

in the target sheet, thin-walled portions having depressions at least on the inner surface are repeatedly formed at intervals, and the microfibrous cellulose aggregates are adhered in the thin-walled portions,

an air-permeable gap is provided between the thin-walled portion of the target sheet and a sheet adjacent to an inner surface of the target sheet.

Technical Field

The present invention relates to a disposable wearing article of a fastening type such as a tape-type disposable diaper.

Background

A typical connected disposable wearing article includes: the back side part extends from the front-back direction to the center to the back side, and at least the back side part has wing parts extending to the left and right sides of the width direction than the crotch part. The wing portion has a connecting portion detachably connected to an outer surface of the ventral portion, and the outer surface of the ventral portion has a target portion to which the connecting portion is connected. In use, the wing portions are wound around the outer surface of the abdominal portion from both sides of the waist, and the coupling portions of the wing portions are coupled to the target portion. Such a connected disposable wearing article is used for nursing use (adult use) in addition to use for infants (see, for example, patent document 1).

As for the coupling portion of the coupling tape, a coupling portion formed by a hook (a convex member) of a mechanical fastener (a surface fastener) is more widely used than a coupling portion formed by an adhesive layer. A typical example of the target portion in the former is to fix a member called a target tape made of a plastic film to the outer surface of the abdominal portion. On the other hand, a typical example of the target portion in the latter is a base material made of a plastic film sewn with a thread and a member called a target tape having a loop formed on the base material is fixed to the outer surface of the abdomen-side portion with the thread. In this case, the hook piece of the connecting tape is wound around the loop of the target tape, whereby the connecting tape is connected to the target portion.

In addition, in the case where the coupling part is a hook, the following techniques are also known: the target portion is formed by forming the outer surface of the product with a nonwoven fabric (hereinafter referred to as an exterior nonwoven fabric) and disposing a target sheet such as a plastic sheet on which a connecting position or the like is printed adjacent to the inner surface of the exterior nonwoven fabric. In this case, the user can join the target sheet by wrapping the hook members of the joining portions around the fibers of the outer-cover nonwoven fabric at the positions where the target sheet is seen through the outer-cover nonwoven fabric.

However, these conventional techniques have a problem that the region having the target sheet is likely to feel stuffy because the air permeability is reduced according to the use of the target sheet.

Documents of the prior art

Patent document

Patent document 1: japanese Kohyo publication No. 2002-253608

Disclosure of Invention

Problems to be solved by the invention

Therefore, a main object of the present invention is to reduce stuffiness and the like in a region having a target sheet.

Means for solving the problems

The connected disposable wearing article solving the above problems is as follows.

< embodiment 1 >

A connected disposable wearing article having: a crotch portion including a front-rear direction center; a ventral portion extending from the front-rear direction toward the center to the front side; and a back side portion extending from the front and rear to the center to the rear,

the connected disposable wearing article has:

an absorber which is arranged in the range including the crotch part;

a liquid-permeable top sheet provided on the front side of the absorber;

a liquid-impermeable sheet that is provided on the back side of the absorber and has air permeability; and

an outer nonwoven fabric covering the back side of the liquid-impermeable sheet and constituting the outer surface of the product,

a connecting part detachably connected with the outer surface of the abdomen side part is arranged on both sides of the back side part,

a target sheet is provided at a connection position of the connection portion in the abdominal portion,

the connected disposable wearing article is characterized in that,

the part of the abdomen-side part having the target sheet has an adhering part of a microfibrous cellulose aggregate in a range in a thickness direction from the target sheet to the back surface of the liquid-impermeable sheet,

the abdominal section does not have the microfibrous cellulose aggregates except for the target sheet,

the microfibrous cellulose aggregate can absorb moisture on the front side of the target sheet.

(Effect)

The microfibrous cellulose aggregates have a high hygroscopicity. Therefore, the present connected disposable wearing article can reduce stuffiness in the region having the target sheet. In addition, although the microfibrous cellulose aggregate is hard, in the present connected disposable wearing article, the microfibrous cellulose aggregate is covered at least by the liquid-impermeable sheet and the topsheet on the front side of the article, and the attachment region thereof is also limited. Therefore, while using the microfibrous cellulose aggregate as the moisture absorbent, it is possible to suppress the skin of the wearer from becoming hard to the touch and to prevent stuffiness.

< embodiment 2 >

The attached disposable wearing article according to claim 1, wherein,

the connecting part is a hook part,

the target sheet is a nonwoven fabric bonded to the outer surface of the outer nonwoven fabric,

the fibrous cellulose aggregates are adhered to the nonwoven fabric of the target sheet, and the amount of the fibrous cellulose aggregates adhered to the nonwoven fabric of the target sheet decreases from the front side to the back side of the target sheet.

(Effect)

When the target sheet itself is made of a nonwoven fabric and the microfibrous cellulose aggregates are attached to the nonwoven fabric, the stuffiness in the region having the target sheet can be reduced without increasing the number of components. In addition, since the microfibrous cellulose aggregates are hard, the feel of the skin on the outer surface of the target sheet is affected. Therefore, it is preferable to reduce the amount of attachment of the microfibrous cellulose aggregates from the front side (the side closer to the skin of the wearer when worn) toward the back side (the side farther from the skin of the wearer when worn), and to suppress the skin feel of the outer surface of the target sheet from becoming hard.

< embodiment 3 >

The attached disposable wearing article according to claim 1, wherein,

the connecting part is a hook part,

the target sheet is a nonwoven fabric bonded to the outer surface of the outer nonwoven fabric,

the microfibrous cellulose aggregate is adhered to the nonwoven fabric of the target sheet, and the adhered part of the microfibrous cellulose aggregate does not have the microfibrous cellulose aggregate exposed to the outer surface of the target sheet.

(Effect)

When the target sheet itself is made of a nonwoven fabric and the microfibrous cellulose aggregates are attached to the nonwoven fabric, the stuffiness in the region having the target sheet can be reduced without increasing the number of components. In addition, since the microfibrous cellulose aggregates are hard, the feel of the skin on the outer surface of the target sheet is affected. Therefore, it is preferable that the microfibrous cellulose aggregates exposed on the outer surface of the target sheet are not present, since the outer surface of the target sheet can be prevented from becoming hard to the touch of the skin.

< embodiment 4 >

A connected disposable wearing article according to any one of aspects 1 to 3, wherein,

the connecting part is a hook part,

the target sheet is a nonwoven fabric bonded to the outer surface of the outer nonwoven fabric,

in the target sheet, thin-walled portions having depressions at least on the inner surface are repeatedly formed at intervals, and the microfibrous cellulose aggregates are adhered to the thin-walled portions,

an air-permeable gap is provided between the thin portion of the target sheet and a sheet adjacent to the inner surface of the target sheet.

(Effect)

In the present connected disposable wearing article, moisture can be released along at least the inner surface of the target sheet through the air-permeable gap. In addition, in this process, moisture can be efficiently supplied to the microfibrous cellulose aggregates as the moisture absorbent material to be absorbed.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, there are advantages in that both prevention of fuzz when repeatedly sticking and peeling and improvement of the coupling force of the hook member can be achieved.

Drawings

Fig. 1 is a plan view showing the inner surface of a tape-type disposable diaper in a state where the diaper is unfolded.

Fig. 2 is a plan view showing the outer surface of the tape-type disposable diaper in a state where the diaper is unfolded.

Fig. 3 is a cross-sectional view taken along line 6-6 of fig. 1.

Fig. 4 is a cross-sectional view taken along line 7-7 of fig. 1.

In fig. 5, (a) is a sectional view taken along line 8-8 of fig. 1, and (b) is a sectional view taken along line 9-9 of fig. 1.

Fig. 6 is a cross-sectional view taken along line 5-5 of fig. 1.

Fig. 7 is a sectional view of the attachment portion of the microfibrous cellulose aggregate.

Fig. 8 is a plan view showing a main part of the outer surface of the tape-type disposable diaper.

Fig. 9 is a plan view showing a main part of the outer surface of a tape-type disposable diaper including an absorbent sheet.

Fig. 10 is a sectional view showing a main portion of the tape-type disposable diaper of fig. 9.

Fig. 11 is a plan view showing the outer surface of the tape-type disposable diaper in a state where the diaper is unfolded.

Fig. 12(a) is an enlarged plan view of the target sheet, and (b) is a cross-sectional view of a portion including the target sheet.

Fig. 13 is an enlarged photograph of the attachment portion of the microfibrous cellulose aggregate.

Fig. 14 is a sectional view of a portion containing a target sheet.

Detailed Description

Fig. 1 to 6 show an example of a tape-type disposable diaper, in which reference numeral W denotes the entire width of the diaper except for a connecting tape, reference numeral L denotes the entire length of the diaper, and dot pattern portions in cross-sectional views denote hot melt adhesives as joining means for joining the respective components located on the front and back sides thereof. The hot melt adhesive can be applied by a known method such as slit coating, continuous linear or dotted droplet coating, spray coating in a spiral shape, zigzag shape, or pattern coating (transfer of hot melt adhesive by a relief method). Instead of or in addition to the above method, a hot melt adhesive may be applied to the outer peripheral surface of the elastic member at the fixing portion of the elastic member to fix the elastic member to the adjacent member. Examples of the hot melt adhesive include EVA type, adhesive rubber type (elastomer type), olefin type, polyester/polyamide type, and the like, and can be used without particular limitation. As a joining means for joining the respective components, a means based on fusion of raw materials such as heat sealing and ultrasonic sealing may be employed.

The tape-type disposable diaper comprises: a crotch portion including the center in the front-rear direction LD; a ventral portion F extending from the center of the front-rear direction LD toward the front side; and a back portion B extending from the center of the front-back direction LD to the rear side. Further, the tape-type disposable diaper comprises: an absorber 56 which is provided in a range including the crotch portion; a top sheet 30 which covers the front side of the absorber 56 and is liquid-permeable; a liquid-impermeable sheet 11 that covers the back side of the absorber 56; and an outer nonwoven fabric 12 covering the back side of the liquid-impermeable sheet and constituting the outer surface of the product.

The materials and characteristics of each part will be described in turn below.

(absorber)

The absorber 56 is a part that absorbs and holds excretory fluid, and may be formed of an aggregate of fibers. As the fiber aggregate, in addition to a fiber aggregate obtained by stacking short fibers such as cotton pulp or synthetic fibers, a tow (fiber) of synthetic fibers such as cellulose acetate may be used as necessaryTow) to be opened. The basis weight of the fibers may be, for example, 100 to 300g/m in the case of stacking cotton pulp or short fibers²On the other hand, in the case of the filament aggregate, for example, it may be 30 to 120g/m²Left and right. The fineness of the synthetic fiber is, for example, 1 to 16dtex, preferably 1 to 10dtex, and more preferably 1 to 5 dtex. In the case of filament aggregates, the filaments may also be non-crimped fibers, but preferably crimped fibers. The crimp amount of the crimped fiber may be, for example, 5 to 75, preferably 10 to 50, and more preferably 15 to 50 per 2.54 cm. In addition, uniformly crimped fibers may be used.

(superabsorbent polymer particles)

The absorbent body 56 may contain superabsorbent polymer particles in a part or all thereof. The super absorbent polymer particles include "powder" in addition to "particles". As the super absorbent polymer particles, super absorbent polymer particles used in such absorbent articles can be used as they are. The particle size of the super absorbent polymer particles is not particularly limited, and for example, the following particle sizes are preferable: when the particles falling to the undersize by the sieving were sieved (5 minutes shaking) using a 500 μm standard sieve (JIS Z8801-1:2006), and the particles were sieved (5 minutes shaking) using a 180 μm standard sieve (JIS Z8801-1:2006), the proportion of the particles remaining on the 500 μm standard sieve was 30 wt% or less, and the proportion of the particles remaining on the 180 μm standard sieve was 60 wt% or more.

The material of the super absorbent polymer particles is not particularly limited, but is preferably a material having a water absorption capacity of 40g/g or more. As the super absorbent polymer particles, there are starch-based, cellulose-based, synthetic polymer-based and the like, and starch-acrylic acid (salt) graft copolymer, saponified product of starch-acrylonitrile copolymer, crosslinked product of sodium carboxymethylcellulose, acrylic acid (salt) polymer and the like can be used. The shape of the super absorbent polymer particles is preferably a normally used powder-like super absorbent polymer particle, but super absorbent polymer particles of other shapes may be used.

As the super absorbent polymer particles, super absorbent polymer particles having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. When the water absorption rate is too low, so-called back flow, in which the liquid supplied into the absorbent body 56 is returned to the outside of the absorbent body 56, is likely to occur.

In addition, as the super absorbent polymer particles, it is preferable to use super absorbent polymer particles having a gel strength of 1000Pa or more. This can effectively suppress the sticky feeling after liquid absorption even when the absorbent body 56 is formed to be bulky.

The basis weight of the super absorbent polymer particles may be determined as appropriate depending on the absorption amount required for the use of the absorbent body 56. Therefore, it cannot be said that, in general, it may be 50 to 350g/m²。

(packaging sheet)

The absorbent body 56 may be incorporated as an absorbent unit 50 wrapped with a wrapping sheet 58 in order to prevent the superabsorbent polymer particles from coming off or to improve the shape retention of the absorbent body 56. As the wrapping sheet 58, a paper towel, in particular, crepe paper, nonwoven fabric, polyethylene laminated nonwoven fabric, a sheet with small holes, or the like can be used. Among them, a sheet in which the super absorbent polymer particles are not separated is preferable. When a nonwoven fabric is used instead of crepe paper, a hydrophilic SMMS (spunbond/meltblown/spunbond) nonwoven fabric is particularly preferable, and polypropylene, polyethylene/polypropylene, or the like can be used as the material. The basis weight of the fiber is preferably 5 to 40g/m²Particularly preferably 10 to 30g/m²。

The packaging sheet 58 may be configured such that the entire absorbent body 56 is wrapped with one sheet as shown in fig. 3, or the entire absorbent body 56 may be wrapped with a plurality of sheets such as upper and lower 2 sheets. The wrapping sheet 58 may be omitted.

(Top sheet)

The top sheet 30 has liquid permeability, and for example, a nonwoven fabric or a porous plastic sheet having holes or holes may be used.

The top sheet 30 extends from the front end to the rear end of the product in the front-rear direction and extends to a position more lateral than the absorbent body 56 in the width direction WD, but in the case where the starting points of the standing gathers 60 described later are located more toward the widthwise center side than the side edges of the absorbent body 56, for example, appropriate deformation such as making the width of the top sheet 30 shorter than the full width of the absorbent body 56 can be performed as necessary.

(intermediate sheet)

An intermediate sheet (also referred to as a "second sheet") 40 may be provided on the back side of the top sheet 30 in order to prevent the liquid that has passed through the top sheet 30 from flowing back. The intermediate sheet 40 may also be omitted.

As the intermediate sheet 40, various nonwoven fabrics can be suitably used, and particularly, a bulky hot air nonwoven fabric can be preferably used. In the case where the composite fiber having a core-sheath structure is preferably used for the air-through nonwoven fabric, the resin used for the core may be polypropylene (PP), but Polyester (PET) having high rigidity is preferable. The basis weight is preferably 17-80 g/m²More preferably 25 to 60g/m². The thickness of the raw material fiber of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use a fiber having a core which is not centered, a hollow fiber, or a fiber having a core which is eccentric and hollow as a mixed fiber of all or a part of the raw material fibers.

The intermediate sheet 40 in the illustrated example is shorter than the width of the absorber 56 and is disposed at the center, but the intermediate sheet 40 may be provided over the entire width. The intermediate sheet 40 may be provided over the entire length of the diaper, but may be provided only in the intermediate portion including the excretion portion as shown in the illustrated example.

(liquid-impermeable sheet)

The liquid-impermeable sheet 11 is not particularly limited, but preferably has moisture permeability. As the liquid-impermeable sheet 11, for example, a microporous sheet obtained by kneading an inorganic filler with an olefin resin such as polyethylene or polypropylene, molding the resultant sheet, and then stretching the sheet in a uniaxial or biaxial direction can be suitably used. As the liquid-impermeable sheet 11, a material having improved water repellency using a nonwoven fabric as a base material may be used.

The liquid-impermeable sheet 11 preferably extends in the same or a wider range as the absorbent body 56 in the front-back direction LD and the width direction WD, but may be configured so as not to cover the end of the absorbent body 56 in the front-back direction LD and the width direction WD, if necessary, in the case where other water blocking means or the like is present.

(nonwoven fabric for exterior application)

The outer nonwoven fabric 12 covers the entire back side of the liquid-impermeable sheet 11, and gives the outer surface of the product a cloth-like appearance. Instead of using one nonwoven fabric, a plurality of nonwoven fabrics may be used in a stacked state. In the latter case, the nonwoven fabrics are preferably bonded to each other with a hot melt adhesive or the like. When a nonwoven fabric is used, the constituent fibers preferably have a fineness of 1.6 to 2.3dtex and a basis weight of 15 to 25g/m²And the thickness is 0.3-0.8 mm.

(vertical pleats)

In order to prevent the excrement moving in the transverse direction along the top sheet 30 and to prevent so-called side leakage, it is preferable to provide standing gathers 60 standing toward the skin of the wearer on both sides in the width direction WD of the surface. Of course, the standing gather 60 may be omitted.

When the standing gather 60 is used, the structure thereof is not particularly limited, and any known structure can be used. The raised gathers 60 illustrated in the drawing are composed of a gather sheet 62 substantially continuous in the width direction WD, and an elongated gather elastic member 63 fixed to the gather sheet 62 in an extended state along the front-rear direction LD. As the gather sheet 62, a water repellent nonwoven fabric can be used, and as the gather elastic member 63, a rubber thread or the like can be used. Instead of providing a plurality of elastic members as shown in fig. 1 and 2, 1 elastic member may be provided.

The inner surface of the gather sheet 62 has a joining start end in the width direction WD on the side portion of the top sheet 30, and a portion on the outer side in the width direction from the joining start end is joined to the inner surface of each side flap portion SF, that is, the side portion of the liquid impermeable sheet 11 and the side portion of the outer-covering nonwoven fabric 12 on the outer side in the width direction in the illustrated example, by a hot melt adhesive or the like.

In the leg hole, the portion further to the inner side in the width direction than the joining start end of the standing gather 60 is fixed to the top sheet 30 at both ends in the front-rear direction of the product, but the portion therebetween is an unfixed free portion which stands up by the contraction force of the elastic member 63 and comes into close contact with the body surface.

(wing part, flank part)

The tape-type disposable diaper illustrated in the drawings has a pair of end flaps EF extending to the front side and the rear side of the absorbent body 56, respectively, and not having the absorbent body 56, and a pair of side flaps SF extending laterally from both side edges of the absorbent body 56, respectively, and not having the absorbent body 56. The flap part SF may be formed of a material (such as the outer nonwoven fabric 12) continuous with the part having the absorbent body 56 as shown in the drawing, or may be formed by attaching another material.

(plane pleat)

A side elastic member 64 made of an elongated elastic member such as a rubber thread is fixed to each side flap portion SF in an extended state along the front-rear direction LD, and thus the leg hole portion of each side flap portion SF is configured as a planar gather. The leg elastic members 64 may be provided between the gather sheet 62 and the liquid-impermeable sheet 11 on the outer side in the width direction in the vicinity of the joining start end of the gather sheet 62 in the joined portion as shown in the figure, or between the liquid-impermeable sheet 11 and the outer-covering nonwoven fabric 12 in the side flap portion SF. In addition to the plurality of leg hole elastic members 64 provided on each side as in the illustrated example, only 1 leg hole elastic member may be provided on each side.

The planar gathers are portions where the contraction force of the side elastic members 64 acts (in the figure, portions where the side elastic members 64 are illustrated). Therefore, in addition to the mode in which the side elastic members 64 are present only in the portions of the plane gathers, the present invention also includes the following configuration: although the side elastic member 64 is present on the front side, the rear side, or both sides of the planar gathers, the side elastic member is finely cut at one or more locations, or is not fixed to the sheet sandwiching the side elastic member 64, or both, at locations other than the locations of the planar gathers, whereby the contractive force does not act (substantially equal to the absence of the elastic member) at the locations other than the planar gathers, and the contractive force of the side elastic member 64 acts only at the locations of the planar gathers.

(wing part)

In the tape-type disposable diaper, the back side portion B has a wing portion WP extending outward in the width direction WD from the crotch portion M. Similarly, the stomach-side portion F also has a wing portion WP extending outward in the width direction WD from the crotch portion M. These wing portions WP may also be formed of a different member from the other portions. However, in the configuration having the side wing portions SF as in the illustrated example, it is preferable to cut the side portions of the side wing portions SF in the front-rear direction LD to form the concave edges 70 extending from the side edges of the crotch portion M to the lower edges 71 of the wing portions, and as a result, the wing portions WP are formed, which facilitates manufacturing.

(connecting belt)

As shown in fig. 1, 2, and 6, the wing portions WP in the back portion B are each provided with a connecting band 80, and the connecting band 80 is detachably connected to the outer surface of the stomach portion F. When the diaper 10 is worn, the connecting tape 80 is wound around the outer surface of the abdominal portion F from both sides of the waist, and the connecting portion 83 of the connecting tape 80 is connected to an appropriate position on the outer surface of the abdominal portion F.

As shown in fig. 6, the coupling tape 80 includes: a sheet base 80S having a base end portion 81 fixed to the wing portion WP and a body portion 82 extending from the base end portion 81; and a coupling portion 83 provided at an intermediate portion in the width direction WD of the main body portion 82 in the sheet base 80S and coupled to the ventral portion F. A portion of the body 82 closer to the proximal portion 81 than the coupling portion 83 is an unconnecting portion 84 that is not coupled to the abdominal portion F, and the opposite side is a grip portion 85. These non-coupling portions 84 and the grip portion 85 are constituted only by the sheet base 80S forming the main body portion 82.

The coupling portion 83 is formed of a hook (a convex member) of a mechanical fastener (a surface fastener). The hook member has a plurality of engaging projections on its coupling surface, and the engaging projections may have any shape, such as (a) レ shape, (B) J shape, (C) mushroom shape, (D) T shape, (E) double J shape (shape in which the J-shaped engaging projections are coupled back to back).

The sheet base 80S formed from the base end portion 81 to the body portion 82 may be a nonwoven fabric, a plastic film, a polyethylene laminated nonwoven fabric, paper, or a composite material thereof, and preferably has a fineness of 1.0 to 3.5dtex and a basis weight of 60 to 100g/m²Spun-bonded nonwoven fabric and hot-air nonwoven fabric each having a thickness of 1mm or lessOr a spunlace nonwoven.

The connection portion 83 illustrated in the drawing is provided on the sheet base 80S of the connection band 80 protruding from the wing portion WP, but may be provided directly on the wing portion WP.

(target sheet)

The target sheet 20 is provided at the connection portion of the connection band 80 in the abdominal portion F.

The material of the target sheet 20 is not particularly limited, and when the connection portion 83 is a hook member, for example, a long fiber nonwoven fabric in which fibers are partially welded to each other by ultrasonic welding in a discontinuous pattern may be used. In this case, the long fiber nonwoven fabric preferably has a constituent fiber fineness of 5 to 10dtex and a basis weight of 25 to 40g/m²And a non-woven fabric having a thickness of 0.3 to 0.8 mm.

In the case where the coupling portion 83 is a hook member, a target sheet 20 in which a large number of loop yarns around which the engaging protrusions of the hook member are wound are provided on the surface of a base material made of a plastic film or a nonwoven fabric may be used. Specifically, the composite sheet is one in which loop fiber yarns are stitched to at least the outer surface of a base material. In this sheet, the pile fiber yarns project in the weft radial direction at intervals on the outer surface of the base material, that is, on the outer surface side of the disposable diaper, and the pile fiber yarns are joined to each other on the back side (wearer side) of the base material to form an intersecting part row of the pile fiber yarns.

In the case where the coupling portion 83 is a hook member and the coupling portion of the coupling band 80 in the abdominal portion F is formed of the nonwoven fabric 21 (for example, in the case where the exterior nonwoven fabric 12 is provided as shown in the illustrated example), the target sheet 20 such as a plastic sheet, paper, or nonwoven fabric 21 on which the coupling portion such as the scale 29 is printed may be disposed inside the exterior nonwoven fabric 12. In this case, the user can join the target sheet 20 seen through the outer-cover nonwoven fabric 12 by winding the hook members of the joining portions 83 around the fibers of the outer-cover nonwoven fabric 12. If the scale 29 is a mark indicating the position in the width direction WD, it may be a mark in which a plurality of linear marks along the front-rear direction LD are provided at predetermined intervals in the width direction WD; as shown in fig. 11 and 12(a), a plurality of arabic numerals are provided at predetermined intervals in the width direction WD; although not shown, a plurality of marks having an appropriate shape such as an arrow or a triangle are provided at predetermined intervals in the width direction WD; or a combination thereof.

On the other hand, when the connection portion 83 is an adhesive layer, a target sheet 20 obtained by applying a peeling treatment to a surface of a plastic film having a smooth surface with high adhesiveness can be used.

(attachment of microfibrous cellulose aggregate)

Characteristically, the portion of the stomach-side portion F having the target sheet 20 has the attached portion 23 of the microfibrous cellulose aggregate 22 in the range in the thickness direction from the target sheet 20 to the back surface of the liquid-impermeable sheet 11, and the microfibrous cellulose aggregate 22 is capable of absorbing moisture located at a position more on the front side than the target sheet 20. In addition, at least in the ventral portion F (more preferably, the entirety of the article), the microfibrous cellulose aggregate 22 is not present except for the portion having the target sheet 20. The microfibrous cellulose aggregates 22 have a high hygroscopicity. Therefore, in the present connected disposable wearing article, stuffiness in the region having the target sheet 20 can be reduced. In addition, although the microfibrous cellulose aggregate 22 is hard, in the present connected disposable wearing article, the microfibrous cellulose aggregate 22 is covered at least by the liquid-impermeable sheet 11 and the topsheet 30 on the front side of the article, and the attachment region thereof is also limited. Therefore, while the microfibrous cellulose aggregate 22 is used as the moisture absorbent, the skin of the wearer can be prevented from becoming hard to the touch, and stuffiness can be prevented. As shown in fig. 8(b), it is preferable that the microfibrous cellulose aggregate 22 is not present except for the portion overlapping the absorbent body 56, since the skin of the wearer can be further inhibited from becoming hard to the touch.

The microfibrous cellulose aggregate 22 may be attached to the target sheet 20 itself as in the examples shown in fig. 2, 7, 8, 11, and 12, or may be provided in another member in a portion overlapping the target sheet 20 as shown in fig. 9 and 10. As another member in the latter case, the outer nonwoven fabric 12 or the liquid-impermeable sheet 11 may be used when the target sheet 20 is attached to the outer surface of the outer nonwoven fabric 12, or the liquid-impermeable sheet 11 may be used when the target sheet 20 is sandwiched between the outer nonwoven fabric 12 and the liquid-impermeable sheet 11. Alternatively, as shown in fig. 9 and 10, a special absorbent sheet 15 having the microfibrous cellulose aggregates 22 attached thereto may be interposed between the target sheet 20 and the liquid-impermeable sheet 11.

The adhering portion 23 of the microfibrous cellulose aggregate 22 can be produced by a known method such as: the cellulose film is formed by applying a microfibrous cellulose dispersion dispersed in a dispersion such as water to a member to be attached such as a nonwoven fabric and drying the applied material.

When the adhering portions 23 of the microfibrous cellulose aggregates 22 are formed by applying the microfibrous cellulose dispersion, the concentration (mass/volume) of the microfibrous cellulose dispersion is preferably 0.1 to 10%, more preferably 1.0 to 5.0%, and particularly preferably 1.5 to 3.0%.

The B-type viscosity (60rpm, 20 ℃) of the microfibrous cellulose dispersion is, for example, 700cps or less, preferably 200cps or less, and more preferably 50cps or less. By suppressing the B-type viscosity of the microfibrous cellulose dispersion liquid so low, the microfibrous cellulose is uniformly imparted to the nonwoven fabric.

The microfibrous cellulose dispersion may be applied by a transfer method such as a relief printing method, in addition to spraying on the target surface.

Examples of pulp fibers that can be used for the production of the microfibrous cellulose include chemical pulps such as hardwood pulp (LBKP) and softwood pulp (NBKP), bleached thermomechanical pulp (BTMP), ground wood pulp (SGP), pressure ground wood Pulp (PGW), refined ground wood pulp (RGP), chemical ground wood pulp (CGP), high-temperature ground wood pulp (TGP), ground wood pulp (GP), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), and mechanical pulp (RMP); waste paper pulp produced from tea waste paper, kraft envelope waste paper, magazine waste paper, newspaper waste paper, leaflet waste paper, office waste paper, corrugated paper waste paper, high-white waste paper, kent waste paper, imitation waste paper, securities waste paper, grass paper waste paper, or the like; deinked pulp (DIP) obtained by deinking waste paper pulp, and the like. These pulps may be used alone or in combination of two or more kinds as long as the target effect is not impaired. Further, a material obtained by subjecting the pulp fiber to chemical treatment such as carboxymethylation may be used.

Examples of the method for producing the microfibrous cellulose include mechanical methods such as a high-pressure homogenizer method, a high-pressure microfluidizer method, a mill grinding method, a bead mill freeze-pulverization method, and an ultrasonic defibration method, but are not limited to these methods. In addition, the nanofibrillation is promoted by the combined use of TEMPO oxidation treatment, phosphorylation treatment, acid treatment, and the like.

The adhering portion 23 of the microfibrous cellulose aggregate 22 may be provided in any pattern as long as it has a portion of the target sheet 20. For example, the attachment portion 23 of the microfibrous cellulose aggregate 22 may be provided in a continuous planar shape over the entire or most of the portion having the target sheet 20. However, since the microfibrous cellulose aggregate 22 is hard, the adhering portions 23 of the microfibrous cellulose aggregate 22 are preferably arranged in a repeating pattern at intervals in a direction such as the front-back direction LD, the width direction WD, or an oblique direction inclined with respect to the above direction. For example, as shown in fig. 8 b, the attachment portions 23 of the round, polygonal, or other dot-shaped microfibrous cellulose aggregates 22 may be arranged in a staggered arrangement (in the illustrated example), a matrix arrangement (not shown), or other scattered arrangement.

The adhering portion 23 of the microfibrous cellulose aggregate 22 may be disposed in a horizontal stripe pattern in which a plurality of linear adhering portions 23 are arranged at intervals in the front-rear direction LD as shown in fig. 2 or 9, or in a vertical stripe pattern in which a plurality of linear adhering portions 23 are arranged at intervals in the width direction WD as shown in fig. 8 (a). Although not shown, the adhering portions 23 of the microfibrous cellulose aggregates 22 may be arranged in a lattice or diagonal lattice shape formed by the adhering portions 23 of the linear microfibrous cellulose aggregates 22 extending in the front-rear direction LD and the adhering portions 23 of the linear microfibrous cellulose aggregates 22 extending in the width direction WD. When the adhering portions 23 of the microfibrous cellulose aggregates 22 are continuous in a linear shape in this manner, they may be continuous in a curved or wavy shape, in addition to being continuous in a linear shape.

The size of the attached portion 23 of the microfibrous cellulose aggregate 22 can be determined as appropriate. When the attached parts 23 of the microfibrous cellulose aggregates 22 are in a dot pattern, the diameter 23d (the length of the longest part) of the attached parts 23 of the microfibrous cellulose aggregates 22 is preferably 1.0 to 4.0mm, particularly preferably 2.0 to 3.0mm, and the distance x1 between the centers (or the centers of gravity) of the adjacent rows in the width direction WD and the front-rear direction LD and the distance y1 between the centers (or the centers of gravity) of the adjacent rows in the width direction WD and the front-rear direction LD are preferably 5 to 25mm, particularly preferably 15 to 10 mm. In addition, when the attached parts 23 of the microfibrous cellulose aggregates 22 are arranged in a striped pattern, the line width 23w of the attached parts 23 of the microfibrous cellulose aggregates 22 is preferably 1.0 to 4.0mm, and particularly preferably 2.0 to 3.0mm, and the intervals x2 and y2 between adjacent attached parts 23 are preferably 5 to 30mm, and particularly preferably 10 to 20 mm. When the attached portions 23 of the microfibrous cellulose aggregates 22 are arranged in a lattice pattern, the attached portions 23 of the microfibrous cellulose aggregates 22 preferably have a line width of 1.0 to 4.0mm, particularly 2.0 to 3.0mm, and the lattice spacing (the spacing between the attached portions 23 of the parallel microfibrous cellulose aggregates 22) is preferably 5 to 30mm, particularly 10 to 20 mm.

The material to which the microfibrous cellulose aggregates 22 are attached is not particularly limited, and may be a resin film or the like, and is preferably a nonwoven fabric 21 in terms of flexibility and air permeability.

When the target sheet 20 is a nonwoven fabric 21, as shown in fig. 7, the fibrous cellulose aggregates 22 are preferably adhered to the nonwoven fabric 21. In particular, when the target sheet 20 is attached to the outer surface of the outer nonwoven fabric 12 and the hook members of the connection portions 83 are wound around the fibers of the nonwoven fabric 21 to connect them, it is preferable that the attachment portions 23 of the microfibrous cellulose aggregates 22 are formed by bonding the constituent fibers of the nonwoven fabric 21 to each other via the microfibrous cellulose aggregates 22, because the fibers are not easily pulled out and fluffing is not easily caused even if the hook members are attached and detached many times. For example, when the attachment portions 23 of the microfibrous cellulose aggregate 22 are formed by applying the microfibrous cellulose dispersion to the nonwoven fabric 21, the microfibrous cellulose dispersion penetrates between the fibers of the nonwoven fabric 21, the microfibrous cellulose aggregate 22 is firmly attached to the surface of each fiber after drying, and the fibers are firmly bonded to each other by the microfibrous cellulose aggregate 22 at the intersection portions or the adjacent portions of the constituent fibers of the nonwoven fabric 21.

In order to firmly bond the constituent fibers of the nonwoven fabric 21, the attachment portions 23 continuous in the direction intersecting the fiber orientation direction of the nonwoven fabric 21 of the target sheet 20 are preferably arranged in a stripe pattern at intervals of 5mm or more shorter than the fiber length of the nonwoven fabric 21 of the target sheet 20 in the fiber orientation direction of the nonwoven fabric 21 of the target sheet 20. For example, in the examples shown in fig. 2, 11 and 12, the fiber orientation direction of the nonwoven fabric 21 of the target sheet 20 may be the front-rear direction LD, the adhering portions 23 of the microfibrous cellulose aggregates 22 may be formed in a horizontal stripe pattern, and the distance y2 between the front-rear direction LD of the adjacent adhering portions 23 may be shorter than the fiber length of the outer-covering nonwoven fabric 12 and may be 5mm or more.

When the fibrous cellulose aggregate is to be attached to the nonwoven fabric 21, the attached part 23 of the fibrous cellulose aggregate 22 may be attached to at least a part of the nonwoven fabric 21 in the thickness direction, may be attached only to a part of the nonwoven fabric in the thickness direction as shown in fig. 7(c), may be attached to the whole of the nonwoven fabric in the thickness direction as shown in fig. 7(a), (b), and (d), and may be mixed. The amount of deposition of the microfibrous cellulose aggregates 22 may be fixed in the thickness direction of the nonwoven fabric 21 as shown in fig. 7(a), may be changed as shown in fig. 7(b), (c), and (d), or may be mixed.

When the fibrous cellulose aggregate is attached to the nonwoven fabric 21, the microfibrous cellulose aggregate 22 may be applied to the entire circumference of each fiber, or may be attached to the coated side F1 of each fiber in a large amount and not attached to the non-coated side F2 as illustrated by a white arrow in fig. 13 showing the microfibrous cellulose aggregate 22. As shown in fig. 13, the microfibrous cellulose aggregates 22 may be attached substantially continuously along the continuous direction of the fibers, or may be attached sparsely in the continuous direction of the fibers. The less the microfibrous cellulose aggregate 22 in which the fibers are not bonded to each other, the less the nonwoven fabric 21 becomes soft, and therefore, it is preferable.

As in the examples shown in fig. 2, 7, 8, 11, and 12, when the target sheet 20 itself is a nonwoven fabric 21 and the microfibrous cellulose aggregates 22 are attached to the nonwoven fabric, the stuffiness in the region having the target sheet 20 can be reduced without increasing the number of components. However, in this case, the microfibrous cellulose aggregates 22 are hard, and therefore affect the skin feel of the outer surface of the target sheet 20. Therefore, it is preferable that the amount of deposition of the microfibrous cellulose aggregates 22 decreases from the front side toward the back side as shown in fig. 7(b) and (c). This can suppress a decrease in the coupling force of the hook member to the attachment portion 23 of the microfibrous cellulose aggregate 22 and a hardening of the surface texture. As shown in fig. 7(c), it is more preferable that the attachment portion 23 of the microfibrous cellulose aggregate 22 does not have the microfibrous cellulose aggregate 22 exposed on the surface of the nonwoven fabric 21 of the target sheet 20.

Such variation in the distribution unevenness and the amount of attachment of the microfibrous cellulose aggregates 22 in the thickness direction can be achieved by coating the microfibrous cellulose dispersion from either one of the front and back sides of the nonwoven fabric 21 and selecting the degree of coating amount or permeability. For example, the adhering part 23 of the microfibrous cellulose aggregate 22 shown in fig. 7(b) and (c) may be formed by applying a microfibrous cellulose dispersion to the back surface of the nonwoven fabric 21 in an appropriate amount, and the adhering part 23 of the microfibrous cellulose aggregate 22 shown in fig. 7(d) may be formed by applying a microfibrous cellulose dispersion to the surface of the nonwoven fabric 21 in an appropriate amount.

The attachment part 23 of the microfibrous cellulose aggregate 22 preferably contains microfibrous cellulose in an amount of 2 to 7g/m²About, particularly preferably 2 to 5g/m²Left and right.

The adhering portion 23 of the microfibrous cellulose aggregate 22 is colored in a color different from that of the member to be adhered and the member located on the outer surface side thereof (for example, the target sheet 20), and thus the range of the target sheet 20 can be easily visually recognized. The colored adhering portion 23 may be formed in a scale shape (for example, fig. 8(a)) to be a reference of the coupling position of the coupling portion 83. Such a colored attached portion 23 can be formed by adding a coloring material such as a dye to a dispersion of the microfibrous cellulose.

The structure shown in fig. 14 is also preferable when the target sheet 20 is a nonwoven fabric 21 attached to the outer surface of the outer nonwoven fabric 12, the hook members of the connecting portions 83 are wound around the fibers of the nonwoven fabric 21 to connect them, and the microfibrous cellulose aggregate 22 is attached to the nonwoven fabric 21 of the target sheet 20. That is, in this structure, thin portions 22t having depressions at least on the inner surface are repeatedly formed at intervals in the target sheet 20, the microfibrous cellulose aggregates 22 are adhered in the thin portions 22t, and the air-permeable gaps 18 are formed between the thin portions 22t of the target sheet 20 and the sheet adjacent to the inner surface of the target sheet 20. Thereby, moisture can be released along at least the inner surface of the target sheet 20 through the air-permeable gap 18. In addition, in this process, moisture can be efficiently supplied to the microfibrous cellulose aggregates 22 as the moisture absorbent material to absorb moisture. The pattern of the thin portion 22t may be the same as the pattern of the attached portion 23 of the microfibrous cellulose aggregate 22 described above, for example. The size of the thin portion 22t may be the same as or equal to or smaller than the size of the adhering portion 23 of the microfibrous cellulose aggregate 22. The thin portion 22t may have a recess only on the inner surface of the target sheet 20, in addition to the recesses on both the inner and outer sides of the target sheet 20 as in the illustrated example.

The target sheet 20 having the thin portion 22t can be manufactured by forming the thin portion 22t on the nonwoven fabric 21 to be the target sheet 20 by embossing, and simultaneously or thereafter attaching the microfibrous cellulose aggregate 22 to the thin portion 22 t.

In addition, such a target sheet 20 can be manufactured by the following method. That is, when the dispersion of the microfibrous cellulose is applied to the nonwoven fabric 21 serving as the target sheet 20 in a pattern repeated at intervals, the dispersion penetrates into the spaces between the fibers of the nonwoven fabric 21. Then, when this is dried, the thin portion 22t is formed in the applied portion of the dispersion, and the microfibrous cellulose aggregate 22 is formed in the thin portion 22 t. That is, when the dispersion of the microfibrous cellulose is applied to the nonwoven fabric 21 and then the applied portion of the dispersion is dried, the volume of the microfibrous cellulose aggregate 22 gradually decreases when the microfibrous cellulose aggregate 22 is formed. In addition, the volume of the portion of the nonwoven fabric 21 to which the dispersion is applied is reduced, and the thin portion 22t is automatically formed. The present manufacturing method takes advantage of this. According to this method, the target sheet 20 can be formed simply by applying the dispersion of the microfibrous cellulose to the nonwoven fabric 21 to be the target sheet 20 in a desired pattern and drying it.

(nonwoven fabrics)

As the nonwoven fabric in the above description, a known nonwoven fabric can be used as appropriate depending on the location or purpose. As the constituent fibers of the nonwoven fabric, for example, there may be used, without particular limitation, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide (including composite fibers such as a core and a sheath in addition to monocomponent fibers), regenerated fibers such as rayon and cuprammonium fibers, natural fibers such as cotton, and the like, and these may be used in combination. In order to improve the flexibility of the nonwoven fabric, the constituent fibers are preferably crimped fibers. The constituent fibers of the nonwoven fabric may be hydrophilic fibers (including hydrophobic fibers rendered hydrophilic by a hydrophilic agent), or may be hydrophobic fibers or water-repellent fibers (including water-repellent fibers rendered water-repellent by a water-repellent agent). The nonwoven fabric is generally classified into a short fiber nonwoven fabric, a long fiber nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric, a spunlace nonwoven fabric, a thermal (hot air) bond nonwoven fabric, a needle-punched nonwoven fabric, a point-bonded nonwoven fabric, a laminated nonwoven fabric (an SMS nonwoven fabric, an SMMS nonwoven fabric, etc. in which a meltblown layer is sandwiched between spunbond layers), and the like according to the length of the fiber, the sheet forming method, the fiber bonding method, and the laminated structure.

In particular, if the nonwoven fabric 21 of the target portion 20 is a nonwoven fabric 21 of hydrophilic fibers, the microfibrous cellulose aggregates 22 are preferably attached to the nonwoven fabric 21 in a thinner and uniform manner with less breakage of the fibers of the nonwoven fabric 21.

< description of terms in the specification >

Unless otherwise specified in the specification, the following terms in the specification have the following meanings.

"front-rear direction" means a direction (longitudinal direction) indicated by reference numeral LD in the drawing, "width direction" means a direction (left-right direction) indicated by WD in the drawing, and the front-rear direction is orthogonal to the width direction.

"MD direction" and "CD direction" refer to a flow direction (MD direction) in a manufacturing apparatus and a transverse direction (CD direction) orthogonal to the flow direction, and depending on a part of a product, either one is a front-back direction and the other is a width direction. The MD direction of a nonwoven fabric is the direction in which the fibers of the nonwoven fabric are oriented. The fiber orientation is a direction along which the fibers of the nonwoven fabric are oriented, and can be determined by, for example, a measurement method according to a fiber orientation test method of zero-distance tensile strength by TAPPI standard method T481, or a simple measurement method of determining the fiber orientation direction from the tensile strength ratio in the front-back direction and the width direction.

"front side" refers to the side that is closer to the wearer's skin when worn, and "back side" refers to the side that is further from the wearer's skin when worn.

"surface" refers to the side of the component that is closer to the wearer's skin when worn, and "back" refers to the side of the component that is further from the wearer's skin when worn.

"elongation" means a value when the natural length is 100%. For example, an elongation of 200% has the same meaning as an elongation magnification of 2 times.

"gel strength" was determined as follows. 49.0g of a super absorbent polymer was added to 49.0g of artificial urine (prepared by mixing 2 wt% of urea, 0.8 wt% of sodium chloride, 0.03 wt% of calcium chloride dihydrate, 0.08 wt% of magnesium sulfate heptahydrate, and 97.09 wt% of ion-exchanged water), and the mixture was stirred with a stirrer. The resultant gel was allowed to stand in a constant temperature and humidity bath at 40 ℃ X60% RH for 3 hours, and then returned to normal temperature, and the gel strength was measured by a curdometer-MAX ME-500 (manufactured by I.techno Engineering Co.).

"basis weight" is determined as follows. After the sample or test piece was preliminarily dried, it was placed in a laboratory or apparatus in a standard state (temperature at the test site was 23. + -. 1 ℃ and relative humidity was 50. + -. 2%) so as to be in a state of constant volume. Pre-drying refers to bringing the sample or test strip to a constant level in an environment at a temperature of 100 ℃. The fibers having a official moisture regain of 0.0% may not be subjected to preliminary drying. A100 mm X100 mm-sized sample was cut out from a test piece which had reached a constant weight state using a template (stencil) for sample collection (100mm X100 mm). The weight of the sample was measured and multiplied by 100 to calculate the weight per 1 square meter as the basis weight.

"thickness" using an automatic thickness tester (KES-G5 portable compression tester), under load: 0.098N/cm²And a pressing area: 2cm²Under the conditions of (1) automatically. The thickness of the perforated nonwoven fabric was measured at the portions other than the holes and the projections around the holes.

The water absorption was measured in accordance with JIS K7223-1996 "method for testing the Water absorption of a super absorbent resin".

Water absorption Rate the "time to end point" in the "Water absorption Rate test method for highly Water-absorbent resin" of JIS K7224-1996 was carried out using 2g of a highly Water-absorbent Polymer and 50g of physiological saline.

"microfibrous cellulose" refers to a fine cellulose fiber or a bundle thereof taken out of a plant such as pulp, and generally refers to a fibrous cellulose having an average fiber width of nanometer size (1 to 1000nm), preferably a cellulose having an average fiber width (median diameter) of 100nm or less (generally referred to as Cellulose Nanofibril (CNF)), and particularly preferably a cellulose having an average fiber width of 10 to 60 nm.

The "average fiber width" of the microfibrous cellulose can be determined by the following method. Specifically, 100ml of an aqueous dispersion of microfibrous cellulose having a solid content concentration of 0.01 to 0.1 mass% was filtered through a teflon (registered trademark) membrane filter, and 1 solvent substitution was performed with 100ml of ethanol and 3 solvent substitutions were performed with 20ml of t-butanol. Subsequently, freeze-drying was performed, and osmium was applied to the sample. The sample was observed at any of 5000 times, 10000 times, or 30000 times (in the present example, 30000 times) according to the width of the fiber to be formed, based on the SEM image of the electron microscope. Specifically, two diagonal lines are drawn in the observation image, and three straight lines passing through the intersections of the diagonal lines are arbitrarily drawn. Further, a total of 100 fiber rods crossing the three straight lines were visually measured. And, the median diameter (mean diameter) of the measured values was taken as the average fiber width.

The direction in which the fibers of the nonwoven fabric are oriented is the direction in which the fibers of the nonwoven fabric are oriented, and can be determined by, for example, a measurement method according to the fiber orientation test method of zero-distance tensile strength by TAPPI standard method T481, or a simple measurement method in which the fiber orientation direction is determined from the tensile strength ratio between the front-back direction and the width direction.

"expanded state" refers to a state of flat expansion without contraction or relaxation.

Unless otherwise specified, the dimensions of each part are dimensions in the expanded state, not in the natural length state.

The test or measurement is carried out in a laboratory or apparatus in a standard state (the temperature at the test site is 23 ± 1 ℃, and the relative humidity is 50 ± 2%) without description of the environmental conditions in the test or measurement.

Industrial applicability

The present invention can be applied to a disposable wearing article of a fastening type such as the tape-type disposable diaper of the above-described example.

Description of the reference symbols

11 … liquid-impermeable sheet, 12 … outer nonwoven fabric, 80 … joining tape, 83 … joining portion, 82 … main body portion, 81 … proximal end portion, 20 … target sheet, 21 … nonwoven fabric, 22 … microfibrous cellulose aggregate, 23 … attaching portion, 29 … scale, 30 … top sheet, 40 … intermediate sheet, 50 … absorbing unit, 56 … absorber, 58 … wrapping sheet, 60 … standing gather, 62 … gather sheet, 64 … side elastic member, 70 … recessed edge, lower edge of 71 … flap portion, B … back side portion, F … belly portion, LD … front-back direction, M … crotch portion, SF … side flap portion, WD … width direction, WP … flap portion, 22t … thin portion, 18 … air permeable gap.