JP4371736B2 - Absorbent products and methods for their production - Google Patents

Description

  The present invention is applied to, for example, disposable urine, sanitary napkins, incontinence pads, and the like, and relates to an absorbent product for absorbing and holding body fluid such as urine and a method for producing the absorbent product.

Conventionally, absorbent products such as incontinence pads and sanitary napkins are generally pad bodies formed in a rectangular shape or oval shape that is long in one direction, and at the position corresponding to the crotch portion of the underwear, By wearing the same in the length direction, excretion such as urine, feces, menstrual blood, etc. discharged by the user is received.
In such absorbent products, a liquid-impermeable sheet material is applied to the portion that becomes the outer surface when worn by the user, and an absorbent material for absorbing liquid such as urine is arranged on the inside thereof. In addition, a sheet material that allows liquid to pass through is disposed at a location that contacts the user's skin inside.

As a result, urine or the like, which is excretion, is prevented from permeating the liquid-permeable sheet material and absorbed by the absorbent material, and further oozing out to the outside by the liquid-impermeable sheet material.
However, conventional absorbent products such as incontinence pads are unable to follow the user's lower body form with complex irregularities and follow the user's body. This causes the inconvenience that excrement leaks from the gap.

In particular, a widely used incontinence pad, etc. employs a so-called crotch gather structure or a three-dimensional gather structure that erects both side parts, but this is not sufficient, rather the user is standing Ideally, the structure in which the liquid absorption part of the absorbent product fits the user's local area or the like appropriately according to changes in posture such as sleeping or sleeping.
Various absorptive products having such a three-dimensional shape have also been proposed (see Patent Document 1).

JP 2002-301097

  However, the one to which such a structure is applied is one in which the three-dimensional shape is damaged while being folded and packaged before use, or the three-dimensional shape becomes insufficient while being worn by the user. There is also. For this reason, an absorptive product that forms and holds an ideal three-dimensional shape has been desired.

  Therefore, the present invention suitably fits in a complicated three-dimensional shape of the user's body in an absorbent product such as an incontinence pad and a sanitary napkin, and prevents discharged body fluid from leaking out. Therefore, it aims at providing the absorptive product which can form and hold a suitable solid shape.

In the present invention, the above object has a shape that is long in one direction, prevents the permeation of liquid, a liquid-permeable surface material disposed on the surface side that contacts the body, An absorber that is disposed between the back sheet and the surface material and absorbs and holds the liquid that has permeated the surface material, and has a deformed portion near the end on the rear side of the product. The deformable portion is at least in the central region of the product in the short direction of the product and is fixed to at least the absorber side, and provides an elastic body that applies a contracting force in the arrangement direction, and an area in which the contracting action of the elastic body works. A slit formed in the absorber in the vicinity, and the elastic body is disposed so as to apply the contraction force mainly along a longitudinal direction of the product, and the slit is formed in the elastic body. In contrast, on both sides of the product in the short direction Each of the slits is provided on both sides of the elastic body and is symmetrical to each other, and the slits are close to each other at the center in the longitudinal direction, The elastic body is achieved by an absorbent product that is a film-like elastic body having a predetermined width that mainly exerts a contracting force in the length direction .

According to the above configuration, the absorbent product of the present invention has a basic shape that is long in one direction by laminating and fixing a plurality of sheet-like materials. The backsheet prevents liquid permeation. The said surface material is a liquid-permeable thing arrange | positioned at the surface side which contacts a body. The absorber is disposed between the back sheet and the surface material to absorb and hold the liquid that has permeated the surface material.
And in this invention, the solid shape corresponding to the shape of a user's body is formed and maintained using an elastic body. In other words, the elastic body is fixed to the absorber side in the laminated structure constituting the product, so that a contracting force is mainly applied to the absorber to create a three-dimensional shape. In this case, it is relatively thick, is not easily deformed, and is easily affected by the absorption of body fluids. By forming slits in the absorber, the contraction force of the elastic body acts as a deformation force that causes the slit portion of the absorber to be bent, so that a three-dimensional shape can be effectively formed and the shape is maintained. be able to. In particular, by arranging the elastic body in the center region in the short direction of the product, it is possible to obtain a shape that matches the complex shape of the human body in the vicinity of the base of the user's foot. As a result, even if the body moves, it can be deformed following the movement, so that leakage of liquid or the like can be reliably prevented.
The elastic body is arranged along the length direction of the product. Then, a bent portion is formed in the material constituting the product at the slit portions arranged on both sides of the elastic body, and the portion to which the elastic body is fixed is effectively convex due to the contraction force of the elastic body. In particular, by providing slits on both sides of the outer side of the elastic body, it is not affected by an adhesive such as hot melt attached to the elastic body, so that deformation can be surely promoted.
In addition, the slits are provided one on each side of the elastic body, are symmetrical to each other, and are provided close to each other at the central portion in the longitudinal direction of each slit and separated from each other as the distance from the central portion increases. Therefore, when the slit portion receiving the contraction force of the elastic body bends, the deformation area becomes a gently curved surface where the elastic body is fixed, and gradually descends from the gently curved surface. By becoming the shape which expands, it is easy to make it the shape which the center part of the elastic body protruded, and can form an appropriate three-dimensional shape.
When a film-like elastic body is used, the elastic body has a predetermined width compared to the case where linear rubber or the like is used as an elastic body. On the other hand, since it can abut on the surface, unnecessary irritation is not given and the uncomfortable feeling of wearing can be reduced. Moreover, sufficient force which deform | transforms the absorber which is a fixed side can be provided by exhibiting stronger contractive force than the case where linear rubber | gum etc. are used as an elastic body.

Preferably, the absorber is formed by laminating a first absorber layer having high liquid diffusibility of the absorbed liquid and a second absorber layer having high liquid retention of the absorbed liquid, An elastic body is fixed to the second absorber layer side, and the slit is provided in the second absorber layer.
According to the said structure, the liquid excreted by providing an absorber with the at least 2 layer of the 1st absorber layer with a high liquid diffusibility of a liquid, and the 2nd absorber layer with a high liquid retainability of a liquid. It absorbs ingredients quickly and excels in diffusion and retention. When the second absorber layer is formed of a polymer sheet or the like, the second absorber layer is relatively hard and hardly deformed. By providing the slit in the second absorber layer, the second absorber layer is easily deformed, The shape can be reliably formed.

Preferably , the first absorber layer is provided with a notch corresponding to the position where the elastic body is provided.
According to the above configuration, with respect to the region to be deformed by the contraction force of the elastic body, the first absorber layer having a relatively large thickness is removed by the notch, so that the deformation for forming the three-dimensional shape is performed. This can be done more reliably.

According to another aspect of the present invention, the back sheet has a shape that is long in one direction and prevents the permeation of liquid, and the liquid permeable surface that is disposed on the surface that contacts the body. And an absorbent body that is disposed between the back sheet and the surface material and absorbs and holds the liquid that has permeated the surface material, and has a deformed portion near the rear end of the product. In order to constitute a part of the deformed portion, a perforated or narrow groove-shaped slit corresponding to a position where the deformed portion is disposed, Including a step of forming in a central region in the width direction of the absorber, and a step of attaching the elastic body extended in one direction at a position corresponding to between the slits ,
Either the slit forming step or the elastic body attaching step is performed first to form the deformed portion, and in the slit forming step, the central portions in the length direction of the slits are close to each other and from the central portion. Accomplished by a method of manufacturing an absorbent product that is shaped to be spaced apart from each other

  As described above, according to the present invention, in an absorbent product such as an incontinence pad and a sanitary napkin, the body fluid and the like discharged to the outside are suitably fitted to the complicated three-dimensional shape of the user's body. In order to prevent leakage, it is possible to provide an absorbent product capable of forming and holding an appropriate three-dimensional shape.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.

  1 to 4 show an absorbent product according to the first embodiment of the present invention, and an example of the configuration of an incontinence pad is shown. In this embodiment, an example of application to an incontinence pad will be described by using an absorbent product as a representative, but it can be applied to a sanitary napkin or urine with the same structure by slightly changing the overall size. is there. Here, FIG. 1 is a schematic perspective view of the incontinence pad 20 as viewed from the front, and the one labeled “front” in the drawing is the front side of the body when worn (the same applies to other drawings). 2 is a schematic plan view of the incontinence pad 20 of FIG. 1, FIG. 3 is a schematic cross-sectional view taken along line AA of FIG. 2, and FIG. 4 is a schematic cross-sectional view taken along line BB of FIG.

  As shown in FIG. 1, the incontinence pad 20 has a long shape in the front-rear direction. As shown in the figure, the incontinence pad 20 has a deformed portion 51 in the vicinity of the rear end portion. The deformable portion 51 is formed by a structure to be described later, and the vicinity of the center is a protruding portion 51a extending in the longitudinal direction. As a result, the deformed portion 51 enters the cracks in the user's buttocks and fills the valleys with the incontinence pad 20 attached, as will be described later, and eliminates the gap. There is an effect.

  In FIG. 1, the incontinence pad 20 is further provided with a convex portion 47 in the vicinity of the center of the inner side so as to be able to properly contact the local part of the user. . The periphery of the convex portion 47 is partitioned by a channel embossed portion 42 that is a groove-like emboss. The three-dimensional gathered portions 26 and 26 are raised on both sides of the channel embossed portion 42, respectively, and serve as a barrier when the excreted liquid or the like tries to leak to the side. Further, a crotch gather portion 31 is provided on both sides of the three-dimensional gather portions 26 and 26, and the liquid gathered in close contact with the user's crotch portion is slightly leaked from the three-dimensional gather portions 26 and 26. Even so, it does not leak out.

2 to 4 show detailed structures for forming the above-described portions, and the structure of the incontinence pad 20 will be described in more detail with reference to these drawings. Note that the cross sections shown in FIGS. 3 and 4 are shown with an increased thickness for the sake of convenience.
As shown in FIG. 3, the incontinence pad 20 has a structure in which a plurality of laminates of a first laminate 21 and a second laminate 22 are stacked and fixed from the side in contact with the user's body. have.
The 1st laminated body 21 is set as the structure which covers the 1st absorber layer 23 which is an absorber wrapped with the tissue 27 with the center surface material 28 which contacts a user's body.

The tissue 27 and the first absorber layer 23 are portions for absorbing and holding the liquid discharged by the user.
The tissue 27 is made of a soft material that absorbs liquid, such as pulp (virgin pulp, recycled recycled paper), rayon, cotton, kenaf, bagasse, silk, hydrophilic treated fibers (polyolefin, polyester, acrylic), etc. Alternatively, a composite sheet can be used.
The tissue 27 covers the first absorbent layer 23 and prevents a part of the contents from leaking or falling off. As shown in FIGS. 3 and 4, the tissue 27 is displaced from the center in the short direction T. It is overlapped and joined at the part. Thereby, it arrange | positions so that the contraction force of the elastic body 45 mentioned later may not be prevented.

  The 1st absorber layer 23 comprises a part of absorber of this embodiment, and is mainly provided with the property to hold | maintain, after rapidly absorbing the absorbed liquid. The first absorber layer 23 is called a so-called “mat” material. For example, a pulp absorber or a polymer formed by mixing a polymer which is an absorbent material with pulp or spraying a polymer with pulp is used. preferable. Here, pulp is an aggregate of cellulose fibers extracted by mechanically or chemically treating wood, for example, and promotes diffusion of absorbed liquid in a state where there are relatively gaps between fibers. The liquid absorption capacity is increased by holding the polymer and increasing the volume in the thickness direction.

  Since the center surface material 28 directly touches the user's skin, a material suitable for the center surface material 28 is selected in consideration of a good touch without damaging the skin more than necessary. The center surface material 28 is also called an inner sheet or a top sheet, and as a fiber of a material suitable for allowing a liquid to permeate and a liquid component to permeate quickly, for example, various natural fibers, synthetic fibers or these fibers can be used. You can choose from combinations. For example, as a synthetic fiber, for example, a fiber formed from polyester or polypropylene fiber so as to improve liquid permeability is preferable. For example, when the center surface material 28 is made of a non-woven fabric, for example, a wet non-woven fabric (paper, tissue, hydrospun (Dexter), chemical bond (or resin bond), thermal bond (embossed, air-through), airlaid, span Lace, spunbond, meltblown, needle punch, stitchbond, SM nonwoven fabric (spunbond and meltblown laminate), SMS nonwoven fabric (spunbond and meltblown laminate) The center surface material 28 is particularly preferably a thermal bond, a spunbond, or a spunlace.

  In this embodiment, preferably, the sublayer 24 is provided between the center surface material 28 and the tissue 27 on the side in contact with the user's body. For example, the sublayer 24 is formed of a bulky (thickness and high porosity) non-woven fabric integrated by using mainly scientific fibers such as polypropylene, polyethylene, and polyester. Then, a fine embossing process (pin embossing) as indicated by the reference symbol P in FIG. 1 is applied to the nonwoven fabric of both the center surface material 28 and the sub-layer 24 so as to overlap with the center surface material 28. It is a diffusion sheet. By providing the diffusion sheet, the liquid that has permeated through the center surface material 28 is rapidly diffused to the first absorbent layer 23 side, and the liquid absorbed by the first absorbent layer travels to the body side. Demonstrate the function to prevent.

Between the lowermost layer of the first laminated body 21, that is, between the second laminated body 22, two side surface materials 29 and 30 are arranged along both side edges to provide a three-dimensional gather portion 26. .
That is, the side surface materials 29 and 30 are arranged on both sides of the center surface material 28 along the longitudinal direction L (indicated by the direction L in FIG. 2) of the center surface material 28. The center surface material 28 can transmit the liquid, whereas the side surface materials 29 and 30 are made of a material that prevents the liquid from transmitting.
As the material of the side surface materials 29 and 30, for example, a polyolefin nonwoven fabric or a combination of a polyester nonwoven fabric and a thin plastic film, a combination of a polyester nonwoven fabric and a polyethylene film, an SM nonwoven fabric, an SMS nonwoven fabric, or the like is adopted. it can.

  The left and right three-dimensional gathers 26 and 26 are formed by disposing the elastic body 15 at least in the center in the longitudinal direction of the side surface materials 29 and 30, respectively. Due to the elastic contraction ability of the elastic body 15, a three-dimensional gather portion 26 is formed in at least the center portion (bag-like folded portion) of each folded side surface material 29, 30 as shown in FIG. . By forming the three-dimensional gather portion 26, the excrement or liquid component of the user is prevented from leaking outside along the short direction (direction perpendicular to the longitudinal direction L in FIG. 2) T of the incontinence pad 20. Block closely to the user's body.

The structure of the 2nd laminated body 22 shown in FIG. 3 is demonstrated.
A second absorber layer 33 is disposed at the center of the second stacked body 22. The second absorber layer 33 is disposed on the outer side at a position farther from the body than the first laminated body 21 including the first absorber layer 23, and is absorbed and held by the first absorber layer 23. It plays the role of absorbing and holding the broken liquid. For this reason, the second absorber layer 33 has a high retention of the absorbed liquid, and is relatively thin and not bulky. As the second absorber layer 22, for example, a pulp alone or, if necessary, a pulp absorber formed by mixing a polymer that is an absorbent material with pulp or spraying a polymer with pulp can be used. A polymer sheet or the like in which a polymer is arranged at high density between sheet materials made of pulp or the like to form a sheet is preferable. Here, the pulp is a thin one in which, for example, an aggregate of cellulose fibers obtained by mechanically or chemically treating wood is combined slightly densely using, for example, an adhesive. For this reason, the second absorber layer 33 is harder and more rigid than the first absorber layer 23, and has a high mold retainability. At this time, as a fiber used together with pulp, a fiber made of PET or PP alone, or a mixture of heat-fusible fibers such as a fiber covered with one as a core and covered with the other, heat fusion is used. By forming the sheet material, the strength when wet may be increased.

  The second absorber layer 33 is covered with tissue 34 to prevent dissipation of polymer or the like. And the back seat | sheet 39 is arrange | positioned on the outer side. The back sheet 39 is an outer sheet material, and is made of a material that prevents permeation of liquid. As a material of the back sheet 39, for example, a thin plastic film, specifically, a polyethylene film, polyethylene laminated paper, or the like can be used. The back sheet 39 does not allow liquid to pass through, but is preferably selected from a material that can permeate water vapor to prevent stuffiness and has some degree of flexibility. As a result, the contents inside the incontinence pad 20 (solid matter such as filth, urine, blood, etc.) do not leak to the outside.

Further, in FIG. 3, crotch gather nonwoven fabrics 32 and 35 are fixed between the tissue 34 and the side surface materials 29 and 30 of the first laminated body 21. That is, the crotch gather non-woven fabrics 32 and 35 are arranged and fixed along the longitudinal direction L on both sides of the product in the form of strips. The liquid or the like from the one laminated body 21 side can pass through to the second laminated body 22 side. Note that the thickness of the opening 41 shown in FIG. 3 is shown for convenience of understanding, and the tissue 27 and the second absorber layer are actually joined.
The outer side edge portions of the crotch gather nonwoven fabrics 32 and 35 are bonded to the side edge portions of the back sheet 39 to form crotch gather portions 31 and 31. That is, for example, string-like elastic bodies 15 and 15 are inserted through the adhesive portions between the outer side edge portions of the crotch gather nonwoven fabrics 32 and 35 and the side edge portions of the backsheet 39, respectively. Similar to the gather portion 26, the gather structure is adopted.
The crotch gather portion 31 cooperates with the three-dimensional gather portion 26 to pull both ends in the short direction corresponding to the crotch of the incontinence pad 20 with an elastic force, thereby improving the fit of the user to the crotch and excretion of the user Demonstrates the function of preventing things or liquid components from leaking from the crotch.

Further, an adhesive portion 37 for temporary fixing is provided on the outer surface of the back sheet 39, and the peeled paper 36 is stuck thereon.
Thus, when the incontinence pad 20 is used, the peeling paper 36 is peeled off to expose the displacement preventing adhesive portion 37 so that the displacement preventing adhesive portion 37 is detachably attached to the inner surface of an underwear, for example. Thus, the incontinence pad 20 can be fixed so as not to be displaced with respect to underwear such as pants. The so-called wing part, in which both end portions in the central region in the longitudinal direction L of the backsheet 39 are further stretched, an adhesive portion is provided on the lower surface thereof, and the stretched portion is folded and fixed to the outer surface of the undergarment. May be provided.

  Furthermore, in the incontinence pad 20 of the present embodiment, as shown in FIGS. 1 and 3, the first absorber layer 23 has a high liquid absorption / diffusion capability and a large thickness. The inner area defined by the section is formed as a convex portion 47 so as to be in close contact with the local part of the user's body. Thus, a gap with respect to a local part of the body is not formed as much as possible, and the discharged liquid or the like can be immediately absorbed so as not to leak sideways. In particular, as shown in FIGS. 1 and 2, the convex portion 47 is provided with concave portions 47a and 47b having reduced widths in the vicinity of the center in the longitudinal direction of the incontinence pad 20, and the channel embossed portion 42 is also the same. It is said that the shape. Further, as shown in FIG. 2, correspondingly, the second absorber layer 33 is also provided with reduced concave portions 33a and 33b near the center of the incontinence pad 20 in the longitudinal direction. . For this reason, since the convex part 47 is made to match the shape of the crotch part of a user's body, it fits more appropriately and does not produce a side leak etc.

  Corresponding to this structure, as shown in FIGS. 1 and 3, both side portions of the region including the thick first absorber layer 23 are located inside the three-dimensional gather portions 26, 26. The side barrier portions 25 and 25 are raised by the standing action of the three-dimensional gather portions 26 and 26. Thereby, in addition to the above-described operation of the three-dimensional gather portions 26, 26, by effectively absorbing the liquid or the like that leaks in the lateral direction (direction T in FIG. 2) inside these, it is more effective. Side leakage can be prevented.

In addition, the incontinence pad 20 of the present embodiment includes the above-described deformed portion 51 in one end region in the longitudinal direction L of the product in FIG. 2, for example, in the vicinity of the rear end portion of the product in the illustrated case. As shown in FIGS. 3 and 4, the deformed portion 51 has a predetermined width from the vicinity of the end of the second absorber layer 33 at the rear end of the incontinence pad 20 to the vicinity of the channel embossed portion 42. The structure includes slits 46 and 46 provided in the second absorber layer 33.
Although the number of the slits 46 and 46 provided in the second absorber layer 33 may be one, preferably two are provided as illustrated.
As a result, when the slit portions 46 and 46 that have received the contraction force of the elastic body 45 bend as shown in FIG. 1, the deformable portion 51 is fixed to the elastic body 45 as shown in FIG. 4. The portion becomes a gently curved surface 51a projecting upward, and the shape gradually expands downward from the gently curved surface 51a, so that a three-dimensional shape that does not easily lose its shape can be formed.
The slits 46 and 46 do not have to be cuts that completely cut the second absorber layer 33, but have a narrow groove shape, a perforated shape, or other second absorber layer 33. May be formed with a cut or the like that does not completely cut.

FIG. 5 shows how the elastic body 45 is fixed.
Here, as the elastic body 45, for example, as shown in the figure, a film-like elastic body having a predetermined width that mainly exerts a contracting force in the length direction is suitable.
As shown in the figure, the film-like elastic body 45 is fixed by being applied to the second absorbent layer 33 using an adhesive such as hot melt in a state where tension is applied in the directions of arrows C and C. . In addition, FIG. 5 is explanatory drawing and the shape of the 2nd absorber layer 33 is not the same as actual.
Thereby, in the second absorber layer 33, the elastic body 45 causes the contraction force indicated by the arrows D and D to act on the longitudinal direction L of the incontinence pad 20 at the place where the elastic body 45 is fixed. Acts as a deformation force that bends the slits 46 and 46 upward.

  Here, as the elastic body 45, a film-like elastic body made of urethane, polyethylene, natural rubber or the like is used. Therefore, in comparison with the case of using a linear rubber or the like, by adopting such a structure, Since the portion where the elastic body 45 is disposed can come into contact with the skin of the user wearing the incontinence pad 20, unnecessary irritation is not given, and the wearing discomfort can be reduced. Moreover, sufficient force to deform | transform the 2nd absorber layer 33 absorber which is a fixed side can be provided by exhibiting stronger contractive force than the case where linear rubber | gum etc. are used as an elastic body.

The slits 46 and 46 may be parallel to each other. However, when the parallel slits are to be formed, the manufacturing process has the disadvantage shown in FIG. In the roller cutter R1 of FIG. 6A, blades C1 and C1 arranged in parallel to each other are provided on the outer periphery of the roller. When the slits are formed by cutting the second absorber layer 23 with such a roller cutter R1, parallel slits 16 and 16 as shown in the lower figure are formed.
However, if such processing is continued, in the roller cutter R1, the processing load is applied only to a part of specific portions where the blades C1 and C1 are provided, so that the roller cutter R1 is easily damaged and only replacement cost is required. In addition, the production line often has to be stopped, and the production efficiency is poor.

On the other hand, the roller cutter R2 of FIG. 6B is provided with blades C1 and C1 arranged non-parallel so as to approach and separate from each other on the outer periphery of the roller. When the slits are formed by cutting the second absorber layer 23 with such a roller cutter R2, slits 46, 46 as shown in the lower figure are formed. That is, the slits 46 and 46 are not parallel to the length direction L of the incontinence pad 20, and at least one end side is provided so as to be separated from the elastic body 45 disposed between the slits 46 and 46. In this embodiment, the slits 46 and 46 are provided one by one on both sides of the elastic body 45 and are symmetrical to each other. The slits 46 and 46 are close to each other at the center in the longitudinal direction and away from the center. For example, each is formed in a bow shape so as to be separated from each other.
Thereby, in roller cutter R2, it can avoid applying force only to the limited part, and damage to roller cutter R2 for slit formation can be prevented effectively. Further, by forming such two slits in a bow shape, it becomes easy to deform into a shape in which a narrow central portion protrudes, and it is easy to fit the shape of the body.

The slits 46 and 46 formed in this manner are formed in the second absorber layer 33. Since the second absorber layer 33 contains a large amount of polymer, the second absorber layer 33 is not only easily affected by the liquid but also relatively hard and difficult to deform. Therefore, the second absorber layer 33 is provided with slits 46 and 46. Thereby, it is easy to deform | transform and a solid shape can be formed reliably.
Further, as shown in FIG. 2, a notch 43 is provided at the rear end portion of the first absorber layer 23 corresponding to the position where the elastic body 45 is provided. For this reason, by removing the relatively thick first absorber layer 23 with the notch 43 in the region to be deformed by the contraction force of the elastic body 45, the deformation by the elastic body 45 is caused on the body side. It is possible to more reliably perform the deformation for forming the three-dimensional shape.

  The incontinence pad 20 of the present embodiment is configured as described above. As shown in FIG. 7, the temporary fixing adhesive portion 37 (FIG. 3) is provided at a location corresponding to the inner crotch portion of the underwear PA. The deformation portion 51 is temporarily fixed using the reference). In FIG. 7, for convenience of understanding, the incontinence pad 20 is shown larger than the actual size with respect to the size of the underwear P made of pants or paper diapers. And the incontinence pad 20 has the deformation | transformation part 51 mentioned above near the rear end. The deformed portion 51 enters the cracks of the user's buttocks and is filled in the valleys, thereby eliminating gaps.

  As a result, even if the user works while standing with the incontinence pad 20 or goes to sleep, there is no gap between the user and the incontinence pad 20 at the crack of the buttocks. The urine does not leak out, and the deformed part 51 enters the cracks in the buttocks, preventing re-shifting and twisting when the body is moved. There is no worry about getting dirty. And the deformation | transformation part 51 can form the above-mentioned solid shape appropriately, and can maintain the solid shape without impairing also in a mounting state or at the time of carrying of a product.

  8 to 11 show modifications of the first embodiment, and these drawings show only the vicinity of the rear end portion of the incontinence pad 20. In these modified examples, the portions denoted by the same reference numerals as those used in the description of the first embodiment described above and the portions omitted from the illustration have the same configuration as the description of the first embodiment. The description which overlaps is abbreviate | omitted and it demonstrates centering around difference.

Modification 1 and Modification 2 shown in FIG. 8 and FIG. 9 are other formation examples of the slit formed in the second absorber layer 33, respectively. It is.
That is, in the first modification shown in FIG. 8, the slits 53 and 54 provided on both sides of the elastic body 45 have one lower portion and two upper portions, and the extending direction is also upward. It opens to the outside. As described above, the slit is a portion that undergoes bending deformation under the contraction force of the elastic body 45. In this case, each of the two slit portions bends corresponding to the outer shape of the collar portion of the user wearing the incontinence pad 20 from the bottom to the top in a substantially spherical shape. Thereby, the deformation | transformation part 51 can be deform | transformed into a more three-dimensional form so that it may match with the curved surface of the collar part.

  In the second modification shown in FIG. 9, each of the slits 55 and 56 provided on both sides of the elastic body 45 has a single lower portion and three upper portions. Also in this case, each of the three slit portions bends so that the deformable portion 51 can be deformed into a more three-dimensional form so as to be more suitable for the curved surface of the collar portion. Moreover, the three slits are adapted to the curved surface in the front-rear direction of the body because the roots are in a radiating state, and the vicinity of each tip is inclined in parallel and substantially obliquely.

Modification 3 and Modification 4 shown in FIGS. 10 and 11 both show an example in which the slit is formed along the short direction T which is a direction orthogonal to the length direction L of the incontinence pad 20.
In the third modification of FIG. 10, each of the slits 57, 58 provided on both sides of the elastic body 45 has a large number of short slits along the horizontal direction in the drawing arranged in the longitudinal direction of the incontinence pad 20. It is formed as follows.
As a result, each slit is bent so as to be particularly adapted to the curved surface in the front-rear direction of the body without hindering deformation due to contraction of the elastic body 45.

  In the modified example 4 of FIG. 11, a large number along the horizontal direction is formed in such a manner that both ends of the elastic body 45 protrude from the elastic body 45 rather than positions on both sides of the elastic body 45, respectively. Are formed so as to be aligned in the longitudinal direction of the incontinence pad 20. The slit may be provided at a position so as to cover the elastic body 45 as described above, and in this case as well, substantially the same effect as that of the third modification is exhibited.

  FIG. 12 shows an incontinence pad 60 as a second embodiment of the absorbent product of the present invention. FIG. 12 corresponds to FIG. 2 of the first embodiment. In the second embodiment, the same reference numerals as those in the first embodiment are used in common, and the operational effects are also the same. Therefore, the overlapping description is omitted, and only the differences are described.

As shown in FIG. 13A, in this embodiment, the elastic body 45 is coated with adhesives 62, 62 such as hot melt, and is shown in FIG. 13B. As described above, the surface coated with the adhesive is pasted on the nonwoven fabric 61. The nonwoven fabric 61 is stuck on the second absorbent layer 33 so that the elastic body 45 is fixed to the second absorbent layer 33 side.
The non-woven fabric 61 described above is fixed at a location indicated by reference numeral 61 in FIG.

The reason for this configuration is that when the elastic body 45 is applied directly to the second absorber layer 33 as in the first embodiment, depending on the contraction force of the elastic body 45 or the second absorption layer 33 Depending on the structure of the body layer 33, the adhesive portion between the elastic body 45 and the second absorber layer 33 peels off the surface material of the second absorber layer 33, so that the elastic body 45 eventually becomes the second absorber. This is because the layer 33 may be peeled off.
Therefore, the elastic body 45 is attached to the thin nonwoven fabric 61 whose rigidity is weakened to such an extent that the contraction force is not affected, and the nonwoven fabric 61 having a larger area is attached to the second absorbent layer 33, whereby the elastic body 45 contracts. It is possible to effectively prevent the force from being concentrated on a small area of the second absorber layer 33 and peeling off the surface layer that is easily peeled off. The nonwoven fabric 61 may also be provided with the same slit as the second absorbent layer 33. The elastic body 45 may be provided and arranged so that a plurality of linear rubbers are parallel, or the nonwoven fabric 61 may be arranged by providing the contraction force in the direction of the short direction T instead of the L direction. . Other functions and effects of this embodiment are the same as those of the first embodiment.
Alternatively, the elastic body 45 may be formed of a nonwoven fabric and a plurality of thread-like elastic bodies by arranging and bonding a plurality of thread-like elastic bodies so as to be positioned on the nonwoven fabric in parallel.

Next, an embodiment of a method for manufacturing an incontinence pad that is an absorbent product will be described.
FIG. 14 is a flowchart showing an example of a manufacturing process for manufacturing the incontinence pad 20 described with reference to FIGS. 1 to 4, for example.
In this figure, in this manufacturing process, the upper layer unit and the lower layer unit are formed separately, and are fixed after being overlapped. Here, the upper layer unit and the lower layer unit substantially correspond to the first stacked body 21 and the second stacked body 22 described in FIG. 3, but are different in the three-dimensional gather portion 26 included in the first stacked body 21. This configuration is not included in the upper layer unit but is included in the lower layer unit on the second stacked body 22 side. The following description will be given with reference to the structure and the reference numerals in FIGS.

  First, the upper layer unit pulverizes (ST12) while feeding the roll-shaped pulp (ST11), mixes the polymer (ST13), forms a mat (ST14), and then forms the first absorber layer 23. Form and wrap with tissue 27 (ST15), supply a band-shaped center surface material 28 from a predetermined roll (ST16), cut the sublayer 24 and overlap (ST17, ST18), and pierce the pin emboss After the installation (ST19), these and the mat-shaped material are integrated (ST20). Then, channel emboss 42 is applied to the form shown in FIG. 1 (ST21).

The lower layer unit supplies a material to be the second absorber layer 33 (ST31), and performs an embossing process or the like in the supply process. And this is wrapped with the tissue 34 (ST32). And the slit demonstrated in FIG. 5 is formed in the polymer sheet which is the 2nd absorber layer 33 by the method demonstrated in FIG. 6, for example (ST33). Thereafter, the outer shape of the second absorber layer 33 is cut into a shape as indicated by a dotted line in FIG. 2 (ST34).
On the other hand, the material which becomes the side gather nonwoven fabric 32 is supplied separately (ST35), divided into two so as to correspond to the left and right portions of FIG. 3 (ST36), and then bonded to the material cut in ST34 (ST37). ).

  Separately, a strip-shaped release paper 36 is supplied from a predetermined roll, and a non-displacement hot-melt adhesive is applied to the surface side to be in contact with the back sheet (ST39). After being cut into a size (ST40), it is affixed to the back sheet 39 intermittently (ST41). The crotch gather non-woven fabrics 32 and 35 constituting the crotch gather part 31 are sent out (ST42), and an adhesive is applied to the gather part (ST43), so that the back sheet 39 is integrated. Thus, the back sheet 39 integrated with the crotch gathers is fixed to the second absorbent layer 33 made of the above material (ST44). The three-dimensional gathered portion 26 formed as follows is fixed to the portion of the second laminated body 22 formed in this way.

That is, a band-shaped side surface material 30 which is a nonwoven fabric for forming the three-dimensional gathered portion 26 is supplied (ST46), and is divided into two parts left and right as shown in FIG. 3 (ST47). The hot melt adhesive (ST49) applied to the body 15 (ST48) is adhered to each of the divided side surface materials 30. And these are adhere | attached on the 2nd absorber 33 which formed the external shape in ST45 (ST50).
Next, the deformed portion 51 of FIG. 4 is formed. That is, the elastic body 45 that is long in one direction is supplied while being fed with tension by a roll (ST51), applied with a hot melt adhesive, and adsorbed on the outer periphery of the re-pitch drum, for example. Next, it is cut (in an extended state) corresponding to each product, and is positioned so as to fit in the space between the slits 46 and 46 formed in FIG. It is affixed to the 2nd absorber layer 33 through the absorber layer 33 or the nonwoven fabric 61 demonstrated in FIG. 13 (ST52).

Next, the upper layer unit and the lower layer unit are bonded (ST53), the outer periphery of the product is heated and sealed (ST54), and finally the outer periphery is cut so as to conform to the outer shape of the product (ST55). Is completed.
In the above manufacturing process, the elastic body is attached in ST52 after the slit is formed in ST33. However, the elastic body attaching process may be provided before the slit is formed.

By the way, the present invention is not limited to the above embodiment.
Although an incontinence pad is illustrated as an example of the absorbent product of the above-described embodiment, the present invention is not limited to this, and may be applied to absorbent products other than the incontinence pad, for example, feminine sanitary products and various products such as diapers it can.
In the above-described embodiment, an example of a two-layer absorber having a layer structure has been described. However, the absorber may be a single layer or a multilayer absorber having more than two layers.
Further, in the above-described embodiment, the example in which the deformable portion 51 is provided at the position corresponding to the heel portion has been described. However, the deformable portion 51 may be formed in the crotch portion that is the central region in the longitudinal direction L.
The individual configurations of the above-described embodiments may be omitted as necessary, or may be combined with other configurations not described.

The schematic perspective view of the incontinence pad which concerns on 1st Embodiment of the absorbent product of this invention. FIG. 2 is a schematic plan view of the incontinence pad of FIG. 1. The AA line schematic sectional drawing of FIG. BB schematic sectional drawing of FIG. Explanatory drawing which shows the fixing method of the elastic body of the incontinence pad of FIG. Explanatory drawing which shows the formation method of the slit of the incontinence pad of FIG. Explanatory drawing which shows the usage method of the incontinence pad of FIG. The principal part enlarged view which shows the modification 1 of the incontinence pad of FIG. The principal part enlarged view which shows the modification 2 of the incontinence pad of FIG. The principal part enlarged view which shows the modification 3 of the incontinence pad of FIG. The principal part enlarged view which shows the modification 4 of the incontinence pad of FIG. The schematic plan view of the incontinence pad which concerns on 2nd Embodiment of the absorbent product of this invention. Explanatory drawing which shows the method of fixing the elastic body of the incontinence pad of FIG. The flowchart which shows an example of the manufacturing process of an incontinence pad.

Explanation of symbols

  20, 60 ... incontinence pads (absorbent products), 21 ... first laminate, 22 ... second laminate, 23 ... first absorber layer, 24 ... sub Layer, 25, 25 ... Side barrier part, 26, 26 ... Solid gather part, 27 ... Tissue, 28 ... Center surface material, 29, 30 ... Side surface material, 31, 31, .. Crotch gather part, 33 ... second absorber layer, 43 ... notch part, 46, 46 ... slit, 47 ... convex part, 51 ... deformed part, L ... -Longitudinal direction of the incontinence pad, T ... Short direction of the incontinence pad.

Claims (4)

Has a long shape in one direction,
A backsheet to prevent liquid permeation;
A liquid-permeable surface material disposed on the side of the surface that contacts the body;
An absorber that is disposed between the back sheet and the surface material and absorbs and holds the liquid that has passed through the surface material;
Has a deformed part near the rear end of the product,
The deformation part is
In the central region of the short direction of the product , at least an elastic body that is fixed to the absorber side and gives a contracting force with respect to the arrangement direction;
In the vicinity of the region where the contracting action of the elastic body works, a slit formed in the absorber
Have
The elastic body is arranged so as to apply the contraction force mainly along the longitudinal direction of the product, and the slits are located on both sides in the short direction of the product with respect to the elastic body, Each is provided,
In addition, the slits are provided one by one on both sides of the elastic body, are symmetrical to each other, and are provided close to each other at the center in the longitudinal direction of each slit and separated from each other as the distance from the center is increased. And
An absorptive product, wherein the elastic body is a film-like elastic body having a predetermined width for applying a contracting force mainly in a length direction . The absorber is formed by laminating a first absorber layer having high liquid diffusibility of the absorbed liquid and a second absorber layer having high liquid retention of the absorbed liquid, and the elastic body has the second is fixed to the absorber layer side, and wherein the slit is provided in the second absorber layer, an absorbent product according to claim 1. The absorbent product according to claim 2 , wherein a cutout portion is provided in the first absorbent layer corresponding to a position where the elastic body is provided. A back sheet that has a long shape in one direction, prevents liquid permeation, a liquid-permeable surface material disposed on the surface that contacts the body, and between the back sheet and the surface material A method for producing an absorbent product comprising an absorbent body that absorbs and holds the liquid that has been disposed and permeated through the surface material, and has a deformed portion near the rear end of the product ,
A step of forming a perforated or narrow groove-like slit in a central region in the width direction of the absorber corresponding to a position where the deformable portion is disposed in order to constitute a part of the deformable portion. When,
A step of attaching the elastic body extended in one direction at a position corresponding to between the slits ,
While performing any one of these slit forming process and elastic body attaching process first to form the deformed portion ,
In the slit forming step, the slits are formed so as to have shapes that are close to each other at the center in the longitudinal direction of the slits and are separated from each other as the distance from the center is increased. .

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