JP2019063126A - Pad-type absorbent article - Google Patents

Abstract

To provide a pad-type absorbent article of a shape that prevents adhesion to each other when stacked.SOLUTION: A pad-type absorbent article comprises an outside sheet and an absorber positioned on the outside sheet, and a displacement prevention part is provided on each of a front end part and a rear end part of the outside sheet rear face. The pad-type absorbent article comprises: a center folding line which is positioned at a center in a longitudinal direction of the outside sheet; and outside folding lines which are respectively positioned between the center folding line and a front end edge of the outside sheet and between the center folding line and a rear end edge of the outside sheet. When the center folding line and the outside folding lines are valley-folded, the displacement prevention parts contact each other, and the absorber is thick in a center part thereof and thin in a front end part and a rear end part thereof.SELECTED DRAWING: Figure 4

Description

  TECHNICAL FIELD The present invention relates to a pad type absorbent article having a slip stopper on the back surface.

A pad type absorbent article which is used by being disposed on the inner surface of a tape type or underpants type disposable diaper such as a pad type disposable diaper such as a urine absorbing pad or the inner surface (hereinafter generically referred to as outer) of the lower surface. In the back side, at least on both sides in the front and rear direction, there is provided a slip prevention portion made of an adhesive or a hook material (male material) of a mechanical fastener (surface fastener), etc. It is common to prevent the displacement at the time of wearing.
Conventionally, the shape of the pad-type absorbent article when packaged in a packaging film (package) is a shape in which the surface is folded in two with the center in the front-rear direction of the article as the apex. (Patent Document 1). The same article of this shape is packaged in a plurality of overlapping in the same direction and is sold as one package. The user of the item pulls out the item from the package for use.

JP, 2016-123585, A

However, since the anti-slip portion of the same item folded in two is located on the back side, when two or more pieces are stacked in the same direction, the anti-slip portion of the same article adheres to the anti-slip portion of the other same article Cause things to do. In this state, when the user tries to pull out one specific same item from the package, the same adjacent item is also pulled out together unintentionally, which is troublesome.
Therefore, a main problem to be solved by the present invention is to provide a pad-type absorbent article having a shape that does not adhere to each other in a stacked state.

  The present invention which solved the above-mentioned subject is as follows.

<Invention according to claim 1>
An outer sheet and an absorber disposed on the outer sheet;
A slip stopper is provided at each of the front end and the rear end of the outer sheet back surface,
A pad type absorbent article,
A central fold line located in the front-rear direction center of the outer sheet;
And an outer fold line positioned between the central fold line and the front end edge of the outer sheet and between the central fold line and the rear end edge of the outer sheet,
When the valley folding is performed at the central folding line and the outer folding line, the shift preventing portion is configured to abut.
The absorber has a thick central portion, and thin front and rear ends,
Pad type absorbent article characterized by the above.

(Action effect)
The pad-type absorbent article of the present invention has a liquid-impervious sheet, an absorber disposed on the liquid-impervious sheet, and a slip stopper on the back surface of the liquid-impervious sheet.
In addition, when the valley fold is performed at the center fold line and the two outside fold lines, the shape becomes a four fold shape, and the shape can be maintained by the adhesion of both the slip stoppers. And since it does not exist on the outer side of the same article when both four-fold shape is made, even if the same article is overlapped in the same direction, unintended adhesion does not occur mutually.
Furthermore, since the central portion of the absorber is thick, the thickness of the same article when made into a four-folded shape becomes uniform. In the conventional article, the thickness of the entire surface of the absorber is constant, so that in the case of a four-folded shape, the area around the outer folding line is thicker than the area around the central folding line. However, by setting the thickness in the vicinity of the center of the absorber, the thickness in the vicinity of the outer folding line and the thickness in the vicinity of the central folding line become equivalent, and the thickness of the article becomes uniform without deviation. Have. In addition, the definition of an outer side folding line and a center folding line is mentioned later.

<Invention according to claim 2>
The central portion of the absorber is constituted by a plurality of layers, and the front end portion and the rear end portion are constituted by one layer;
The pad type absorbent article according to claim 1, wherein the front and rear end edges of the multi-layer portion are separated at least 5 mm in the center side from the outer folding line.

(Action effect)
The outer folding line of the same article is located in the single layer absorbent body portion, and the central folding line is located in the multiple layer absorbent body portion. In the bending of the thick portion, the resistance against bending is strong, a force to open is exerted, and in the case of a multi-layer structure, the central folding line is easily opened, so the article can be easily developed along the outer inner surface. In addition, by arranging the outer folding line in the single-layered absorber portion, it is possible to prevent the disassembling of the absorber due to the bending load.

<Invention according to claim 3>
Both widthwise ends of the multi-layered portion are in a necked shape,
The pad-type absorbent article according to claim 1, wherein the necked shape straddles the central fold line.

(Action effect)
The bending of thick parts is highly resistant to bending and exerts an opening force. By making the central folding line into a narrow shape and reducing the width of the absorber, the resistance is reduced and the four-folded shape is maintained.

<Invention according to claim 4>
Gather sheets are provided in the front and back direction on both sides in the width direction of the inner sheet arranged to cover the surface of the absorber,
In the longitudinal direction of the pad type absorbent article,
The pad type absorbent article according to any one of claims 1 to 3, wherein the rising of the gather sheet is positioned closer to the front and rear end edges of the outer sheet than the outer folding line.

(Action effect)
If the start-up position of the gather sheet is positioned closer to the end edge than the front end folding line or the rear end folding line, the center folding line of the same article is first placed on the outer inner surface and the center folding line is expanded in use. However, the gather sheet does not stand up and stays asleep. Second, when the outer folding line is developed along the outer inner surface, the gather sheet rises for the first time. Therefore, when the user wears the same article, it is possible to prevent a mistake such as the hand being accidentally caught on a gather sheet rising up beforehand and shifting the same article, so that the working efficiency can be improved. .

<Invention according to claim 5>
The pad-type absorbent article according to any one of claims 1 to 4, wherein the front and rear end edges of the outer sheet are located at the thin portion at the stage of folding at the outer folding line.

(Action effect)
The thickness of the four-fold shape may be further reduced by arranging the fold line so that the edge of the same article is positioned on the one layer portion of the absorber when the outer fold line is folded. It has the effect of being able to

  According to the invention, the pad-type absorbent articles are shaped such that they do not adhere to each other in the overlapping state.

It is a top view which shows the surface side of the unfolded state of a pad type absorbent article. It is a top view which shows the back side of the unfolded state of a pad type absorbent article. It is AA sectional drawing of FIG. It is sectional drawing at the time of the 4-fold shape of a pad type absorbent article. It is the schematic which shows an outer. It is sectional drawing which shows roughly the mounting | wearing point of the pad type absorbent article to outer surface (BB sectional drawing of FIG. 5) inner surface. It is a top view which shows the surface side of the unfolded state of the pad type absorbent article whose center part of an absorber is an hourglass-like part.

Hereinafter, modes for carrying out the present invention will be described. The following description and drawings merely show one embodiment of the present invention.
Here, for convenience of explanation, the following terms are defined. The outer folding line 71 is a position having a length of about 10 to 22% in the central direction from the end edge (or the end edge of the rear end portion BA) of the front end portion FR of the outer sheet 40 in the width direction WD. It refers to the fold that extends. The central folding line 72 refers to a fold in the width direction WD passing through the middle point of the outer sheet 40 in the front-rear direction LD. Further, the central side of the outer folding lines 71 in the front-rear direction LD is referred to as a central portion CE, the front edge side of the central portion CE as a front end portion FR, and the rear edge side as a rear end portion BA. However, in the central portion CE, the absorber 23 can be disposed in a plurality of layers, and the outer folding line 71 can be bent more smoothly if disposed on a single layer of the absorber 23. The front and rear end edges may be separated from the outer fold lines 71 by at least 5 mm toward the center.

  FIGS. 1 to 3 show a pad type absorbent article 200. FIG. The pad type absorbent article 200 is assumed to be used by laying on a predetermined position of the inner surface 70 of the outer 100 such as a disposable diaper or cloth underwear, and the central portion CE which is the crotch portion C, It has a front end portion FR which is a ventral side portion extending to both front and rear sides and a rear end portion BA which is a back side portion. The "crotch" in the absorbent pad means a portion corresponding to the crotch of the body at the time of use, and in most products, it is the central portion CE in the front-rear direction and a portion in the vicinity thereof.

  The dimensions of the pad type absorbent article 200 can be appropriately determined. For example, in the case of an adult product, the overall article length L (length in the front-rear direction) can be about 450 to 630 mm, and the article overall width W can be about 135 to 320 mm. .

(About the absorber 23)
The pad type absorbent article 200 has a basic structure in which an absorbent body 23 is interposed between the inner surface of the outer sheet 40 and the inner sheet 22. The absorber 23 is an object that absorbs and holds waste liquid and other liquids. As the material of the absorbent body 23, it is preferable to use a pile of pulp fibers, an aggregate of filaments such as cellulose acetate, or a non-woven fabric, and mixing and adhering a superabsorbent polymer as necessary. Can. If necessary, the absorber 23 can be wrapped by crepe paper (not shown). Moreover, the shape of the absorber 23 can be made into appropriate | suitable shapes, such as a strip | belt shape, a rectangular shape, hourglass shape, etc. whose width of the part on the front side is wider than the part on the back side.
In particular, as shown in FIG. 7, in the case where both ends in the width direction WD of the central portion CE are hourglass-shaped, the width of the constricted portion is preferably 60 to 85% of the total length in the width direction WD.
That is, as described above, the absorber 23 is composed of a piled body of pulp fibers and the like. When a force to bend is applied to the thickly formed absorber 23, a stress acts in the opening direction. Therefore, by forming the constricted portion, stress can be relieved, and unintended expansion of the four-folded shape can be prevented.

In order to eliminate the discomfort at the time of wearing as much as possible, it is desirable that the absorber 23 be formed as thin as possible (thin) as long as the excretory fluid is not reversed. The basis weight of the fiber and absorbent polymer in the absorbent 23 can be determined as appropriate, but the fiber basis weight is preferably about 200 to 600 g / m ^2, and the basis weight of the absorbent polymer is about 100 to 300 g / m ² It is preferable to An absorber composed of these basis weights is referred to as a single layer (or thin) absorber 23a.

(2 layer weight)
However, it may be assumed that the single-layer absorber 23 can not sufficiently absorb the excretory fluid near the central portion CE. In order to cope with this, a plurality of layers of the absorber 23 may be disposed in a portion corresponding to the central portion CE of the absorber 23 (except for the range near the outer fold line 71). By providing a plurality of layers, it becomes thick and absorption of waste fluid becomes possible. For example, by setting the thickness of the absorber to two layers 23 b (in the illustrated form of FIGS. 1 and 7, a region 23 b in a thick line frame), the amount of superabsorbent polymer can be doubled. However, more excretory fluid can be absorbed in the part corresponding to the central part CE (crotch part). Further, when using the same article 200, since the central portion CE is thick, the central folding line 72 can be easily developed in the front-rear direction from the four-folded shape, and the operation is smooth.

(Outer sheet)
The outer sheet 40 is composed of a sheet (liquid impermeable sheet 21) which does not transmit excretory fluid and a sheet (exterior sheet 25) which is disposed on the back surface of the liquid impermeable sheet 21 and which constitutes the outer surface of the product.

(Impermeable sheet)
The liquid impermeable sheet 21 is provided on the back side of the absorber 23 so as to extrude a predetermined length from the peripheral edge of the absorber 23. Then, the inner sheet 22 and the liquid impermeable sheet 21 contain the absorber 23 so as to be sandwiched from the front surface and the back surface, and are adhered to each other, and the absorber 23 is accommodated. Therefore, the liquid-impervious sheet 21 can constitute the back surface of the pad-type absorbent article 200. However, the exterior sheet 25 can be further disposed on the back surface of the liquid-impervious sheet 21.
The material of the liquid impermeable sheet 21 is not particularly limited. For example, an olefin-based resin such as polyethylene or polypropylene, a laminated nonwoven fabric in which a nonwoven fabric is laminated on a polyethylene sheet or the like, and a waterproof film intervene substantially A non-woven fabric (in this case, a liquid-impervious sheet is composed of a waterproof film and a non-woven fabric) in which the liquid-impervious property is secured can be exemplified. Of course, in addition to this, a material having liquid impermeability and moisture permeability that is preferably used from the viewpoint of preventing murray in recent years can also be exemplified. As a sheet of a material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene to form a sheet, and then the sheet is stretched uniaxially or biaxially. The microporous sheet obtained by this can be illustrated. Furthermore, it is waterproof by methods such as non-woven fabric using micro denier fiber, reinforcement of leakproofness by making voids of the fiber smaller by applying heat and pressure, and coating of super absorbent resin or hydrophobic resin or water repellent agent. A sheet made liquid impermeable without using a film can also be used as the liquid impermeable sheet 21. In the embodiment of the present invention, the exterior sheet 25 is disposed on the back surface of the liquid impermeable sheet 21, and the exterior sheet 25 is described as the back surface of the pad type absorbent article 200. However, the exterior sheet 25 can be omitted, and the liquid impermeable sheet 21 can be configured as the back surface of the pad type absorbent article 200.

(Exterior sheet)
The exterior sheet 25 is a sheet that constitutes the back of the product as needed. The material is preferably non-woven fabric, but is not limited thereto. The type of non-woven fabric is not particularly limited, and for example, synthetic fibers such as olefins, polyesters, and polyamides such as polyethylene and polypropylene, regenerated fibers such as rayon and cupra, and natural fibers such as cotton are used as raw fibers. As a processing method, spun lace method, spun bond method, thermal bond method, air through method, needle punch method etc. can be used. However, a long-fiber non-woven fabric such as a spunbond non-woven fabric, an SMS non-woven fabric, or an SMMS non-woven fabric is preferable from the viewpoint of achieving both touch and strength. Nonwoven fabrics can be used alone or in combination of multiple sheets. In the latter case, it is preferable to bond the non-woven fabrics together with a hot melt adhesive or the like. When a non-woven fabric is used, its fiber basis weight is preferably 10 to 50 g / m <2>, particularly 15 to 30 g / m <2>.

(Inner sheet)
The surface of the absorber 23 is covered with an inner sheet 22. Since the inner sheet 22 is in direct contact with the crotch C and needs to quickly permeate the excretory fluid, it is possible to use a porous or non-porous nonwoven fabric having liquid permeability. There is no particular limitation on the constituent fibers of the non-woven fabric. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, etc., mixed fibers of which two or more are used, composite fibers Etc. can be illustrated. Furthermore, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as spun lace method, spun bond method, thermal bond method, melt blown method, needle punch method, air through method, point bond method and the like. For example, the thermal bonding method is a preferable processing method if the spun lace method requires bulkiness and softness if flexibility and drape are required.

  At both ends in the front-rear direction of the pad type absorbent article 200, the outer sheet 40 and the inner sheet 22 are extended and bonded to both the front and rear sides more than the front and rear ends of the absorber 23, and the end flap portion EF where the absorber 23 does not exist Is formed.

  On both sides of the pad type absorbent article 200, the outer sheet 40 is extended to the outside of the side edge of the absorbent body 23, and a gather sheet is formed on the inner surface of a portion from this extension to the side of the inner sheet 22. A portion 24x on the outer side in the width direction of 24 is attached to the whole in the front-rear direction, and constitutes a side flap portion SF in which the absorber 23 does not exist. The bonded portions of the materials including these can be formed by a hot melt adhesive, heat seal, ultrasonic seal, and are shown as hatched patterns in a plan view and dotted patterns in a cross sectional view.

  The absorber interposing portions other than the end flap portion EF and the side flap portion SF constitute a main body portion BD for retaining excrement.

  A plastic sheet or a meltblown non-woven fabric can also be used as the material of the gather sheet 24, but in view of the feel to the skin, a non-woven fabric subjected to water repellent treatment with silicone or the like is suitably used.

  A central portion 24c of the gather sheet 24 in the width direction extends to the upper side of the inner sheet 22, and an elongated elastic member 24G is hot at an end in the width direction center along the longitudinal direction. It is fixed by a melt adhesive or the like. The elongated elastic member 24G is formed in a thread-like, cord-like, band-like, etc., styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, polyester, etc. And commonly used materials can be used.

  Both gather sheets 24, 24 are fixed by being stuck together on the inner surface of the article (in the illustrated form, the inner sheet 22 surface and the inner surface of the outer sheet 40 in the illustrated embodiment) 24c is affixed and fixed to the inner surface of the article (surface of the inner sheet 22 in the illustrated embodiment) at both ends in the front-rear direction, and is fixed to the inner surface of the article (surface of the inner sheet 22 in the illustrated embodiment) between both ends in the front-rear direction Not. This non-fixed portion is a portion to be a solid gather that can stand up against the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment), as shown in FIG. It is located at the boundary between the fixed part 24x on the outer side and the inner part 24c.

  In addition, the gather sheet 24 rises at a non-fixed portion at the center side of the fixed portion to which both end portions in the front-rear direction are bonded. The rising start position, which is the boundary between the fixed portion and the non-fixed portion of the gather sheet 24, may be 10 to 30 mm on both ends of the outer folding line 71. This facilitates the mounting operation. First, the central folding line 72 of the pad type absorbent article 200 is placed on the crotch C of the inner surface 70 of the outer 100 in the mounting operation, and the central folding line 72 is developed. At this time, the gather sheet 24 does not stand up and stays asleep. Second, when the outer folding line 71 is developed along the inner surface 70 of the outer 100, the gather sheet 24 rises up for the first time. Therefore, when the user wears the pad-type absorbent article 200, it is possible to prevent a mistake such as inadvertently hooking a hand on the gather sheet 24 rising up beforehand and shifting the article 200, and the work efficiency can be improved. It can improve.

As shown in FIG. 2 to FIG. 4 and FIG. 6, on the back surface (the back surface of the outer sheet 40) of the pad type absorbent article 200, a displacement prevention portion 30 made of an adhesive layer is provided. The pad type absorbent article 200 is used by being attached to the inner surface 70 of the outer 100. However, if the pad type absorbent article 200 is not adhered to the inner surface 70 of the outer 100, the pad type absorbent article 200 may be displaced. Therefore, in order to bond the displacement prevention portion made of the adhesive layer, the displacement prevention portion 30 is usually provided.
The displacement prevention portion 30 can also be formed by sticking a hook tape having a large number of hook-like protrusions. As the shape of the hook-like protrusion, in addition to the mushroom shape, there are a hook shape, a L shape, a J shape, a T shape, a double J shape (a shape in which a J shape is connected to the back) However, any shape may be used. The hook tape can be attached by a hot melt adhesive or the like.

  The position at which the displacement prevention portion 30 is disposed is a front end portion FR and a rear end portion BA in the front-rear direction on the back surface of the outer side sheet 40 and at least an area on the end side from the outer folding line 71. The dimension of the displacement prevention portion 30 may extend over the entire area of the position where the displacement prevention portion 30 is disposed, preferably, the width is about 70 to 80% of the width of the absorber 23 and the length is the entire length of the absorber 23 It should be about 10 to 20% of

  In addition, since a user does not touch the slip prevention part 30 except the time of use, the protective sheet for the purpose of adhesive force holding which covers the slip prevention part 30 is unnecessary. Therefore, it is possible to save time and effort to peel off and discard the protective sheet.

(Package method)
About a package, it can pack in a packaging film in the state which piled up the pad-type absorbent article 200 of four-fold shape in multiple in the same direction. Therefore, adjacent pad type absorbent articles 200 are packaged in a state in which the portions surrounded by the center fold line 72 and the outer fold line 71 on the back face are in contact with each other in the same direction.

(Drawer of pad type absorbent article)
Typically, the user can pull the pad-type absorbent article 200 out of the packaging film one by one. As described above, when the pad type absorbent article 200 is packaged in an overlapping state, since there is no adhesion between the slip prevention portions 30 with the same article adjacent to each other, only one of them can be pulled out smoothly.
If the pad-type absorbent article 200 is packaged in a plurality of two-folded form, the anti-displacement part 30 provided on the article 200 adheres to the anti-displacement part 30 of the same article 200 adjacent thereto. It will be done. When the user tries to pull out one of the articles, the same article also unintentionally is pulled together. In addition, even if one same article 200 is pulled out, since the displacement prevention portion 30 is exposed, adhesion to an unexpected position may occur during use, which is complicated. However, by forming the same article 200 in a four-fold shape, such complexity is relieved.

(Folded)
The formation of the four-fold shape is performed as follows. First, the outer folding line 71 of the pad-type absorbent article 200 is folded at the apex so that the front end portion FR and the center portion CE face each other. The rear end portion BA is similarly folded. Next, the center folding line 72 is folded at the apex so that the anti-displacement portions 30 provided on the back surfaces of the front end portion FR and the rear end portion BA abut. The shape created by this process is called a four-folded shape. On the other hand, the conventional folding shape shown in Patent Document 1 is a folding shape in which the front end portion FR and the rear end portion BA are folded so as to face the center folding line 72 of the pad type absorbent article 200 at the apex.

(Example of wearing)
When the pad type absorbent article 200 is attached to the outer 100, the article 200 is first folded in four so that the longitudinal direction is along the belly and back of the inner surface 70 of the outer 100, Apply to the crotch C of the inner surface 70 of 100. Thereafter, a central fold line 72 is developed. Then, one of the two outer folding lines 71 is unfolded, and the anti-slip portion 30 on the back surface is locked at a predetermined position on the inner surface 70 of the outer 100. Similarly, the other outer folding line 71 is developed, and the anti-slip portion 30 is locked at a predetermined position. Installation is completed by the above operations.
The user does not need to peel off the protective sheet because there is no protective sheet for holding the adhesive force to cover the displacement prevention portion 30 which is used for conventional products. In addition, since the displacement prevention portion 30 is not touched, lint and other foreign matter do not stick to the displacement prevention portion and the locking force does not decrease.

  The present invention is applicable to sanitary napkins as well as pad-type disposable diapers such as urine absorbent pads, as long as the pad-type absorbent article is used.

  21: Liquid impermeable sheet, 22: inner sheet, 23: absorber, 23a: 1 layer of absorber, 23b: 2 layer of absorber, 24: gather sheet, 25: exterior sheet, 30: slip stopper, 40: Outer sheet, 100: Outer, 200: Pad type absorbent article, C: Crotch, 70: Mounting part, 71: Outer folding line, 72: Central folding line, FR: Front end, CE: Central part, BA ... the rear end.

Claims (5)

An outer sheet and an absorber disposed on the outer sheet;
A slip stopper is provided at each of the front end and the rear end of the outer sheet back surface,
A pad type absorbent article,
A central fold line located in the front-rear direction center of the outer sheet;
And an outer fold line positioned between the central fold line and the front end edge of the outer sheet and between the central fold line and the rear end edge of the outer sheet,
When the valley folding is performed at the central folding line and the outer folding line, the shift preventing portion is configured to abut.
The absorber has a thick central portion, and thin front and rear ends,
Pad type absorbent article characterized by the above. The central portion of the absorber is constituted by a plurality of layers, and the front end portion and the rear end portion are constituted by one layer;
The pad type absorbent article according to claim 1, wherein the front and rear end edges of the multi-layer portion are separated at least 5 mm in the center side from the outer folding line. Both widthwise ends of the multi-layered portion are in a necked shape,
The pad-type absorbent article according to claim 1, wherein the necked shape straddles the central fold line. Gather sheets are provided in the front and back direction on both sides in the width direction of the inner sheet arranged to cover the surface of the absorber,
In the longitudinal direction of the pad type absorbent article,
The pad type absorbent article according to any one of claims 1 to 3, wherein the rising of the gather sheet is positioned closer to the front and rear end edges of the outer sheet than the outer folding line.   The pad-type absorbent article according to any one of claims 1 to 4, wherein the front and rear end edges of the outer sheet are located at the thin portion at the stage of folding at the outer folding line.

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