JP3890342B2 - Absorbent article and inner absorbent article - Google Patents

Description

  The present invention relates to an absorbent article and an inner absorbent article.

Conventionally, in absorbent pads used as diapers by being attached to diapers or diaper exteriors, etc., there are known three-dimensional gathers to prevent leakage and exudation of body fluids absorbed by the absorber. ing. As a method of forming a three-dimensional gather, for example, a method of forming a back sheet by extending the back sheet to the top sheet side and turning it back (for example, Patent Document 1), or a separate liquid as a gather sheet on the upper surface of the top sheet. There is known a method (for example, Patent Document 2) in which a nonwoven fabric (water-repellent or waterproof nonwoven fabric) or the like that is difficult to permeate is pasted.
JP 59-25741 A JP 2003-265521 A

However, in the case of the absorbent pad described in Patent Document 1, the back sheet extends to the top sheet side and is folded to form a three-dimensional gather. Therefore, when the three-dimensional gather contacts the human body when worn, the back sheet Will be in direct contact with the human body. The back sheet is often made of a thick or film-like material because the durability and liquid impermeability must be secured to a certain extent. In addition, there was a problem of causing skin troubles.
On the other hand, in the case of the absorbent pad described in Patent Document 2, a three-dimensional gather is formed by sticking a non-woven fabric (water-repellent or waterproof non-woven fabric) or the like that is difficult to transmit a separate liquid on the top sheet. Therefore, even if a three-dimensional gather touches the human body, it does not give a tingling feeling and it does not impair the feeling of use, but it completely leaks out and exudates body fluid from the place where the top sheet is attached. In other words, there is a problem that the user is uneasy, and the user feels anxiety, and the user feels uncomfortable at the time of leakage or exudation.

  Accordingly, an object of the present invention is to provide an absorbent article and an inner absorbent article having a three-dimensional gather which has a high feeling of use and can prevent leakage and exudation of body fluids.

In order to solve the above-described problem, the invention according to claim 1 is a liquid-permeable top sheet positioned on a surface that contacts the human body, and a liquid-impermeable back positioned on a surface opposite to the top sheet. In an absorbent article comprising a sheet and an absorbent body interposed between the top sheet and the back sheet, the bag is folded back to the top sheet side substantially along the longitudinal side edges of the absorbent body. A three-dimensional gather is formed by covering and covering both sides of the folded portion of the sheet, and the top sheet extends, wraps, and the region located on the upper surface of the absorber of the top sheet has liquid permeability, The region covering the back sheet is characterized in that the liquid is less permeable than the region located on the upper surface of the absorber.

The invention according to claim 2 is the absorbent article according to claim 1 , wherein the back sheet is in contact with end surface portions of both side edges of the absorbent body.

According to a third aspect of the present invention, there is provided a liquid-permeable top sheet positioned on a surface contacting the human body, a liquid-impermeable back sheet positioned on a surface opposite to the top sheet, the top sheet, and the back In an inner absorbent article comprising an absorbent body interposed between the sheet and both sides of the folded portion of the back sheet folded back to the top sheet side substantially along the longitudinal both side edges of the absorbent body, A three-dimensional gather is formed by the top sheet extending, wrapping and covering, the region of the top sheet located on the top surface of the absorber has liquid permeability, and the region covering the back sheet is the absorption The liquid is less likely to permeate than the region located on the upper surface of the body.

  Here, the “inner absorbent article” means an absorbent article of a type that is attached to an outer body such as a diaper outer package during use.

The invention according to claim 4 is characterized in that, in the inner absorbent article according to claim 3, a mark for alignment in the longitudinal direction is formed in the folded portion of the back sheet.

The invention according to claim 5 is the inner absorbent article according to claim 3 or 4 , wherein a space is provided between the top sheet and the back sheet along the longitudinal direction at both longitudinal edges of the absorbent body. A portion is provided.

According to the first aspect of the present invention, the three-dimensional gather is formed from the back sheet and the top sheet that wraps and covers both sides of the folded portion of the back sheet.
Thereby, when the body pressure is applied to the absorbent article, it is possible to prevent the body fluid that has been pressed out from the absorbent body from leaking out from the root part of the three-dimensional gather.
Further, the folded portion of the folded back sheet is wrapped and covered with the top sheet so that the folded portion does not contact the human body.
Thereby, it becomes possible to suppress the stimulus given to the skin at the time of wearing, not only improving the feeling of use, but also reducing skin troubles.
In addition, the three-dimensional gather is provided with cross-likeness, and the user can be expected to have a soft feeling of use.

In addition, the three-dimensional gather is composed of a liquid-impermeable back sheet and a region that is less permeable to liquid than the region located on the top surface of the absorber of the top sheet, thereby preventing the body fluid from leaking more reliably. be able to.
In addition, the three-dimensional gather is provided with cross-likeness, and the user can be expected to have a soft feeling of use.

According to the invention described in claim 3 , the three-dimensional gather is formed from a back sheet and a top sheet that wraps and covers both sides of the folded portion of the back sheet.
Thereby, when a body pressure is applied to the inner absorbent article, it is possible to prevent the body fluid that has been pressed out from the absorbent body from leaking out from the root part of the three-dimensional gather.
Further, the folded portion of the folded back sheet is wrapped and covered with the top sheet so that the folded portion does not contact the human body.
Thereby, it becomes possible to suppress the stimulus given to the skin at the time of wearing, not only improving the feeling of use, but also reducing skin troubles.
In addition, the three-dimensional gather is provided with cross-likeness, and the user can be expected to have a soft feeling of use.
In addition, the three-dimensional gather is composed of a liquid-impermeable back sheet and a region that is less permeable to liquid than the region located on the top surface of the absorber of the top sheet, thereby preventing the body fluid from leaking more reliably. be able to.
In addition, the three-dimensional gather is provided with cross-likeness, and the user can be expected to have a soft feeling of use.

According to the invention described in claim 4 , it is needless to say that the same effect as that of the invention described in claim 3 can be obtained, and the outer package of the diaper or diaper in which the inner absorbent article is attached to the folded portion of the back sheet. A longitudinal alignment mark corresponding to the longitudinal alignment mark provided on the body is formed.
Thereby, an inner absorbent article can be quickly and reliably mounted at an appropriate position in the longitudinal direction of a diaper or a diaper outer package. Therefore, it is possible not only to reduce time and effort during replacement of the inner absorbent article, but also to prevent displacement at the time of wearing and reliably prevent leakage of body fluid.

According to the invention described in claim 5 , it is needless to say that the same effect as that of the invention described in claim 3 or 4 can be obtained, and the top sheet and the back sheet are formed along both sides in the longitudinal direction of the absorbent body. A space is provided between the two.
Thereby, not only can the body fluid overflowing from the absorbent body diffuse in the space and the body fluid can be prevented from seeping out, but also the deodorizing effect can be enhanced.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings.
In this embodiment, an absorbent pad as an absorbent article will be described as an example.
FIG. 1 is a perspective view of an absorbent pad according to Embodiment 1 to which the absorbent pad of the present invention is applied. FIG. 2 is a cross-sectional view taken along line AA ′ of FIG.

  As shown in FIGS. 1 and 2, the absorbent pad 1 is positioned on the surface opposite to the top sheet 2, which is disposed on the contact surface that comes into contact with the human body. The liquid-impervious backsheet 3 is provided, and the absorbent body 4 and the like interposed between the topsheet 2 and the backsheet 3.

The top sheet 2 is a non-woven fabric having liquid permeability and is formed in a shape that covers the surface side (skin contact surface side) of the absorbent body 4.
As a raw material of the non-woven fabric forming the top sheet 2, either natural fibers or synthetic fibers may be used. Examples of natural fibers include cotton, cellulose (wood pulp), wool, silk and the like. In addition, examples of synthetic fibers include polypropylene (PP), polyethylene (PE), nylon, polyester (PET), and acrylic. Also, PE / PP mixed nonwoven fabric, PE / PET mixed nonwoven fabric, and appropriate combinations of the above materials Bicomponent fibers (mixed fibers) can also be used.

  In addition, as a method for producing a nonwoven fabric from these fibrous materials, a known method can be used as appropriate. For example, any method such as chemical bond, thermal bond, and spun lace may be used. Etc., any method such as a spun bond method, a melt blow method, or a combination of these and the above-described adhesion method may be used.

The back sheet 3 is formed of a sheet material having at least water shielding properties such as polyethylene. In addition, it is preferable that the sheet material has moisture permeability from the viewpoint of preventing stuffiness, and as the sheet material having the water barrier property and moisture permeability, an inorganic filler is melt-kneaded in an olefin resin such as polyethylene or polypropylene. Then, after forming the sheet, a microporous sheet material obtained by stretching in a uniaxial or biaxial direction is suitably used.
In addition, an adhesive layer (not shown) is formed on the underwear contact surface of the back sheet 3 so that the absorbent pad 1 can be fixed so as not to be displaced from the outer body of the diaper or diaper during use. .

The back sheet 3 covers the bottom surface of the absorbent body 4, further covers the side surface of the absorbent body 4, and is folded back to the top sheet 2 side from the folding start point 31 at the longitudinal side edges of the top surface of the absorbent body 4. 32 is formed.
The back sheet 3 and the top sheet 2 are adhered to each other by a hot melt adhesive or the like in the vicinity of the folding start point 31.

  A region colored in a given color, that is, colored regions C and C, is provided on the surface of the folded back portions 32 and 32 of the back sheet 3 opposite to the surface facing the top sheet 2. Specifically, for example, as shown in FIG. 1, a colored region C is provided from a folding start point 31 of the folded portion 32 to a colored end C1 located at a predetermined position inside the folded portion 32 in the width direction. . Furthermore, a substantially V-shaped colored notch C2 is formed at a predetermined position on the inner side in the longitudinal direction of the colored region C from the colored end C1 toward the folding start point 31. The colored region C, the colored end C1 and the colored notch C2 in the folded portion 32 can be visually recognized from the skin contact surface side of the absorbent pad 1. The colored end portion C1 serves as an alignment mark in the width direction corresponding to an alignment mark in the width direction provided on a diaper or a diaper exterior body (not shown) to which the absorbent pad 1 is attached. Therefore, the position of the colored end portion C1 is set so as to match the alignment mark in the width direction provided on the diaper or the diaper exterior body (not shown). The colored notch C2 serves as a longitudinal alignment mark corresponding to a longitudinal alignment mark provided on a diaper or diaper exterior (not shown) to which the absorbent pad 1 is attached. Therefore, the position and the number of the colored notches C2 are set so as to match the alignment mark provided on the diaper or the outer package (not shown) of the diaper. The shape of the colored notch C2 is not particularly limited. Furthermore, the alignment mark in the longitudinal direction is not limited to the colored notch C2, but may be provided by printing, pasting other members, or the like.

  The absorbent body 4 is, for example, an absorbent core formed by combining an absorbent material such as cotton or pulp, or a sheet-like base material such as fiber or film and a superabsorbent resin such as a superabsorbent polymer ( (Not shown) is covered with a liquid-permeable crepe paper (not shown). The absorber core may have a single layer structure or may have a structure divided into a plurality of layers.

Next, the three-dimensional gathers 6 and 6 will be described. The three-dimensional gather 6 is formed by sticking the gather sheet 5 that is a nonwoven fabric to the folded portion 32 of the back sheet 3. Specifically, as shown in FIG. 2, the three-dimensional gather 6 is attached to the surface opposite to the surface facing the top sheet 2 of the folded portion 32 from the folded start point 31 to the end of the folded portion 32. Formed by.
Further, the three-dimensional gather 6 is provided with an elastic member 63 extending in the longitudinal direction, and is formed to be extendable and contractable in the longitudinal direction.

The rising portion 61 of the three-dimensional gather 6 is equal to the folding start point portion 31 of the back sheet 3 and is further equal to the adhesion starting point portion 51 of the gather sheet 5. Therefore, the vicinity of the rising portion 61 that is the base portion of the three-dimensional gather 6 is formed by two layers of the back sheet 3 and the gather sheet 5.
On the other hand, since the gather sheet 5 extends beyond the folded-back portion 32, the vicinity of the free end 62 of the three-dimensional gather 6 consists of only one gather sheet 5.
That is, the rising portion 61 that is the base portion of the three-dimensional gather 6 is constituted by the back sheet 3 and the gather sheet 5, and is in contact with the skin when in use, and in particular, the vicinity of the free end 62 of the three-dimensional gather 6 that rubs against the skin, It consists only of gather sheets 5.

  Furthermore, as shown in FIG. 1, the three-dimensional gather 6 is arranged without fixing the free end 62 substantially along the longitudinal side edges of the absorbent body 4, but both longitudinal ends S of the absorbent pad 1, In S, the free end 62 of the three-dimensional gather 6 is folded to the top sheet 2 side and fixed to the top sheet 2.

The gather sheet 5 is desired to be a nonwoven fabric that does not easily allow liquid to permeate, and may be a single-layer nonwoven fabric or a laminated nonwoven fabric.
Examples of non-permeable nonwoven fabrics include spunbond nonwoven fabric, spunbond nonwoven fabric-melt blown nonwoven fabric-spunbond nonwoven fabric, spunbond nonwoven fabric-melt blown nonwoven fabric-melt blown nonwoven fabric-spunbond nonwoven fabric, heat roll nonwoven fabric, liquid impervious nonwoven fabric, Examples include air-through nonwoven fabric.

At this time, as an adhesive for bonding the gather sheet 5 and the back sheet 3, for example, ethylene vinyl acetate copolymer resin (EVA), polyvinyl alcohol (PVA), acrylamide / polyvinyl alcohol copolymer, acrylic acid Ester / vinyl acetate copolymers, sodium carboxymethylcellulose, styrene elastomers such as SIS, SBS, SIBS, and SEPS, polyester / acrylic elastomers, polyolefin elastomers, and the like can be used as appropriate.
The adhesive can be applied by a known application method (for example, spray application or blade coating) such as a curtain method, a beat method, a slot method, or a spiral method.

According to the absorption pad 1 which concerns on Embodiment 1 demonstrated above, since the free end 62 of the three-dimensional gather 6 is comprised with a nonwoven fabric, even if the three-dimensional gather 6 contacts a human body at the time of use, it does not tingle and a feeling of use is obtained. It can be improved and skin troubles can be prevented.
Further, since the back sheet 3 is folded back to the top sheet 2 side, the back sheet 3 covers the absorbent body 4 from the bottom surface to the side surface and part of the top surface of the absorbent body 4, and the root portion of the three-dimensional gather 6 That is, the rising portion 61 is three-dimensionally constituted by the back sheet 3 which is a liquid-impermeable sheet.
Thereby, when a body pressure is applied to the absorbent pad 1, it is possible to prevent the bodily fluid squeezed out from the absorbent body 4 from oozing out from the root portion of the three-dimensional gather 6.
In addition, since the three-dimensional gather 6 is composed of two layers of the back sheet 3 and the nonwoven fabric, it is possible to more reliably prevent the body fluid from exuding.
Further, the rising portion 61 that is the base portion of the three-dimensional gather 6 is continuously constituted by the folded back sheet 3, and an adhesive region for forming the rising portion 61 is provided on the upper surface of the absorber 4. This eliminates the need to secure a sufficient water absorption area on the upper surface of the absorbent body 4, so that body fluid can be absorbed smoothly and leakage of body fluid can be prevented.
Then, by attaching the nonwoven fabric to the skin contact surface that is the surface opposite to the surface facing the top sheet 2 of the folded back sheet 3, the folded back sheet 3 may contact the human body. Therefore, it is possible to suppress irritation to the skin at the time of wearing, not only improving the feeling of use, but also preventing skin troubles.
In addition, since the absorber 4 is wrapped by a method called forehead winding, it is not necessary to form side flaps. Thereby, the absorption pad 1 is not shrunk in the longitudinal direction, and can be smoothly attached to the outer body of the diaper or diaper during use.

  Further, the colored region C1 corresponding to the alignment mark in the width direction and the alignment in the longitudinal direction, provided on the diaper or diaper exterior body (not shown) to which the absorbent pad 1 is attached, on the folded portion 32 of the backsheet 3 Since the colored cutout portion C2 corresponding to the mark is formed, the absorbent pad 1 can be quickly and surely mounted at appropriate positions in the width direction and the longitudinal direction of the outer body (not shown) of the diaper or diaper. it can. Therefore, it is possible not only to reduce time and effort during replacement of the absorbent pad 1, but also to prevent displacement at the time of wearing and reliably prevent leakage of body fluid.

(Embodiment 2)
Next, the absorbent pad 100 according to Embodiment 2 will be described with reference to FIG.
FIG. 3 is a cross-sectional view of an absorbent pad according to Embodiment 2 of the present invention.
The absorbent pad 100 shown in FIG. 3 is different from the absorbent pad 1 of Embodiment 1 in the gather sheet 105. Therefore, in the description of the second embodiment, the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 3, the gather sheet 105 forming the three-dimensional gathers 106, 106 of the absorbent pad 100 completely covers the folded portion 32 of the back sheet 3, covers the side surface side of the absorbent body 4, and the adhesion starting point portion 151. Is bonded to the back sheet 3 so as to be positioned on the bottom surface side of the absorber 4. That is, since the inner side in the width direction of the folded-back portion 32 is bonded as the adhesion starting point portion 151, the bonding area of the gather sheet 105 to the back sheet 3 is larger than that of the first embodiment. It is very large and can be pasted with a sufficient area.

  According to the absorbent pad 100 according to the second embodiment described above, it is possible to bond the gather sheet 105 and the back sheet 3 with a sufficient area, thereby more effectively preventing leakage and exudation of body fluids. In addition, since it is possible to completely prevent the back sheet 3 from coming into contact with the skin, it is possible not only to improve the feeling of use, but also to prevent skin problems.

(Embodiment 3)
Next, an absorbent pad 200 according to Embodiment 3 will be described with reference to FIG.
FIG. 4 is a cross-sectional view of an absorbent pad according to Embodiment 3 of the present invention.
The absorbent pad 200 shown in FIG. 4 is different in the top sheet 202 from the absorbent pad 1 of the first embodiment. Therefore, in describing the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIG. 4, the three-dimensional gathers 206 and 206 of the absorbent pad 200 include a top sheet 202 and a back sheet 3. The back sheet 3 covers the bottom surface of the absorbent body 4, further covers the side surface of the absorbent body 4, and is folded back to the top sheet 202 side from the folded back starting point portion 31 at the longitudinal both side edges of the top surface of the absorbent body 4. 32 is formed.
On the other hand, the top sheet 202 extends and wraps and covers both surfaces of the folded portion 32 of the back sheet 3 folded back to the top sheet 202 side, and the folded starting portion 31 is used as an adhesion starting portion 251 to form a three-dimensional gather 206. To do.
That is, the three-dimensional gather 206 is composed of three layers of the back sheet 3 and the top sheet 202 that sandwiches the sheet from both sides.

  At this time, a region of the top sheet 202 that covers the upper surface of the absorbent body 4 (that is, a body fluid absorption region) has liquid permeability, and a region that forms the three-dimensional gather 206 transmits more liquid than the body fluid absorption region. It has become difficult. Specifically, a region where the three-dimensional gather 206 is formed in the top sheet 202 is subjected to water repellent treatment, waterproof treatment, and the like. As the liquid-permeable nonwoven fabric, the nonwoven fabric mentioned in the description of the top sheet 2 can be used.

According to the absorbent pad 200 according to the third embodiment, the three-dimensional gather 206 is formed from the back sheet 3 and the top sheet 202 that wraps and covers both sides of the back sheet 3, and body pressure is applied to the absorbent pad 200. At this time, the body fluid pressed out from the absorbent body 4 can be prevented from oozing out from the root part of the three-dimensional gather 206.
Further, by wrapping and covering the folded back sheet 3 with the top sheet 202, the folded back sheet 3 can be prevented from coming into contact with the human body, and it is possible to suppress irritation to the skin when worn, and to improve the feeling of use. Not only can it improve, but it can also prevent skin problems.
Further, the three-dimensional gather 206 has cross-likeness, and the user can expect a soft feeling of use.
Further, the three-dimensional gather 206 is composed of the liquid-impermeable back sheet 3 and a region that is less permeable to liquid than the region located on the upper surface of the absorbent body 4 of the top sheet 202, so that the body fluid can be more reliably Can prevent seepage.

(Embodiment 4)
Next, an absorption pad 300 according to Embodiment 4 will be described with reference to FIG.
FIG. 5 is a cross-sectional view of an absorbent pad according to Embodiment 4 of the present invention.
The absorbent pad 300 shown in FIG. 5 is different from the absorbent pad 200 of the third embodiment in the top sheet 302. Therefore, in the description of the fourth embodiment, the same components as those of the third embodiment are denoted by the same reference numerals and the description thereof is omitted.

As shown in FIG. 5, the three-dimensional gathers 306 and 306 of the absorbent pad 300 include a top sheet 302 and a back sheet 3. The back sheet 3 covers the bottom surface of the absorbent body 4, further covers the side surface of the absorbent body 4, and is folded back to the top sheet 302 side from the folded back starting point 31 at the longitudinal side edges of the top surface of the absorbent body 4. 32 is formed.
On the other hand, both sides of the folded portion 32 of the back sheet 3 folded back to the top sheet 302 side are covered with the top sheet 202, and further, the side surface of the absorbent body 4 is covered, and the adhesion starting point portion 351 is covered with the absorbent body 4. A three-dimensional gather 306 is formed by being provided on the back sheet 3 covering the bottom surface.
That is, the three-dimensional gather 306 includes three layers of the back sheet 3 and the top sheet 302 that sandwiches the sheet from both sides.

  At this time, a region of the top sheet 302 that covers the upper surface of the absorbent body 4 (that is, a body fluid absorption region) has liquid permeability, and a region that forms the three-dimensional gather 306 transmits more liquid than the body fluid absorption region. It has become difficult. Specifically, a region where the three-dimensional gather 206 is formed in the top sheet 202 is subjected to water repellent treatment, waterproof treatment, and the like. As the liquid-permeable nonwoven fabric, the nonwoven fabric mentioned as an example of the top sheet 2 can be used.

  According to the absorbent pad 300 according to the fourth embodiment, the adhesion area between the top sheet 302 and the back sheet 3 constituting the three-dimensional gather 306 can be made larger, so that leakage of body fluid and seepage can be prevented more effectively. be able to.

(Embodiment 5)
Next, an absorption pad 400 according to Embodiment 5 will be described with reference to FIG.
FIG. 6 is a cross-sectional view of an absorbent pad 400 according to the fifth embodiment of the present invention.
In the absorbent pad 400 shown in FIG. 6, the shapes of the top sheet 2 and the gather sheet 5 are the same as those in the first embodiment, but the arrangement of the sheets in forming the back sheet 403 and the three-dimensional gather 406 is different. Therefore, in describing the fifth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 6, the three-dimensional gathers 406 and 406 of the absorbent pad 400 include a back sheet 403 and a gather sheet 5. In the present embodiment, the gather sheet 5 is affixed to the surface on the side facing the top sheet 2 of the folded portion 432 of the back sheet 403 that has been folded with the folded starting point portion 431 as the starting point. Specifically, the gather sheet 5 is pasted on the back sheet 403 from the folding start point portion 431 to the folding portion 432 to form a three-dimensional gather 406.

At this time, as the back sheet 403, a laminated nonwoven fabric composed of a liquid-impermeable film layer or a breathable nonwoven fabric layer is used.
Here, the laminated nonwoven fabric is a nonwoven fabric called a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, for example.

Next, an example of a method for manufacturing the absorbent pad 400 will be described with reference to FIG.
FIG. 7 is an explanatory diagram for explaining a manufacturing method of the absorbent pad 400.
As shown in FIG. 7, the absorbent body 4 is placed on the upper surface of the back sheet 403, the top sheet 2 is placed on the upper surface, and further on the upper surface of the top sheet 2, the left and right edges of the top sheet 2. The gather sheet 5 is placed on the upper surface of the back sheet 403 located on the outer side. Here, since the length (width) in the short direction of the top sheet 2 is smaller than the length (width) in the short direction of the back sheet 403, both end portions in the width direction of the back sheet 403, that is, both long side edges. In the portion, the back sheet 403 and the gather sheet 5 are in direct contact with each other.

  Next, the longitudinal side edges of the top sheet 2 are folded back in the direction in which the gather sheet 5 is placed (upper surface direction). At the same time, the folded back portion 432 is formed by folding back to the top sheet 2 side from the folding start point portion 431 while the back sheet 403 and the gather sheet 5 are overlapped. Then, the folded portion 432 is fixed to the gather sheet 5 to constitute a three-dimensional gather 406.

  According to the absorbent pad 400 according to the fifth embodiment described above, the laminar nonwoven fabric is used for the back sheet 403. Therefore, the back sheet 403 has cross-likeness, and a soft feeling for use is expected for the user. Can be made.

(Embodiment 6)
Next, an absorption pad 500 according to Embodiment 6 will be described with reference to FIG.
FIG. 8 is a cross-sectional view of an absorbent pad 500 according to the sixth embodiment of the present invention.
The absorbent pad 500 shown in FIG. 8 is different from the first embodiment in the shapes of the top sheet 502, the back sheet 503, and the gather sheet 505, and the arrangement of the sheets when forming the three-dimensional gather 506. Therefore, in describing the sixth embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIG. 8, the three-dimensional gathers 506 and 506 of the absorbent pad 500 include a top sheet 502, a back sheet 503, and a gather sheet 505. In the present embodiment, the back sheet 503 includes, for example, a film layer having liquid impermeability. The topsheet 502, the longitudinal side edges 4a of the absorbent core 4 to cover the 4a, longitudinal side edges 502a of the topsheet 502, 502a is fixed to the backsheet 503. Further, the gather sheet 505 is folded back from the folding start point 505b, and the folding start point 505b forms a free end 562 of the three-dimensional gather 506. Then, the end portion 505a (one end portion) of the gather sheet 505 that is folded back to the back sheet 503 side is a surface on the side facing the top sheet 502 of the folded portion 532 of the back sheet 503 that is folded back from the folding start point portion 531. The back sheet 503 of the top sheet 502 that covers the longitudinal side edge 4a of the absorber 4 is attached to the end sheet 505c (the other end part) of the gather sheet 505 and folded back to the top sheet 502 side. The three-dimensional gather 506 is formed by pasting on the surface on the side facing the folded portion 532. Further, an elastic member 63 is disposed on the folding start point portion 505b of the gather sheet 505.

According to the absorbent pad 500 according to the sixth embodiment described above, since the gather sheet 505 is attached to both the back sheet 503 and the top sheet 502, the gather sheet 505 is more securely fixed to the absorbent pad 500. The three-dimensional gather 506 is reinforced and the effect of preventing leakage is high.
In addition, since the base portion of the three-dimensional gather 506 is composed of the back sheet 503, the gather sheet 505, and the top sheet 502, it is possible to more reliably prevent leakage and exudation of body fluids.
Furthermore, when body pressure is applied to the absorbent pad 500, it is possible to prevent body fluid that has been pressed out from the absorbent body 4 from leaking out or oozing out from the root portion of the three-dimensional gather 506.
In addition, since the free end 562 of the three-dimensional gather 506 is formed from the folding start portion 505b of the nonwoven fabric that does not easily allow liquid to pass through, it is possible to suppress irritation to the skin at the time of wearing, not only improving the feeling of use, Skin troubles can be reduced.
In addition, the three-dimensional gather 506 is provided with cross-likeness, so that the user can expect a soft feeling of use.
The gather sheet 505 does not have to be provided with a clear folding start portion 505b.

Further, in the absorbent pad 500, as in the absorbent pad 500a shown in FIG. 9, the width of the absorbent body 504 is made narrower than that of the absorbent body 4 of the absorbent pad 500, and the longitudinal direction of the longitudinal side edges of the absorbent body 504 is reduced. The space portions D and D may be provided between the top sheet 502 and the back sheet 503.
Thereby, the body fluid overflowing from the absorber 504 can diffuse the space portions D and D, and the body fluid can be prevented from exuding to the outside, and the deodorizing effect can be enhanced. .

It is an expanded view of the absorption pad of Embodiment 1 to which the absorbent article of this invention is applied. It is sectional drawing in AA 'of FIG. It is sectional drawing of the absorption pad of Embodiment 2 to which the absorbent article of this invention is applied. It is sectional drawing of the absorption pad of Embodiment 3 to which the absorbent article of this invention is applied. It is sectional drawing of the absorption pad of Embodiment 4 to which the absorbent article of this invention is applied. It is sectional drawing of the absorption pad of Embodiment 5 to which the absorbent article of this invention is applied. It is explanatory drawing for demonstrating the manufacturing method of the absorption pad of FIG. It is sectional drawing of the absorption pad of Embodiment 6 to which the absorbent article of this invention is applied. It is sectional drawing for demonstrating the modification of the absorber of the absorption pad of Embodiment 6 to which the absorbent article of this invention is applied.

Explanation of symbols

1, 100, 200, 300, 400, 500, 500a Absorption pad 2, 202, 302, 502 Top sheet 3, 403, 503 Back sheet 4, 504 Absorber 5, 105, 505 Gather sheet 6, 106, 206, 306 , 406, 506 Solid gather 31, 431, 531 Folding start point 32, 432, 532 Folding part 51, 151, 251, 351 Adhesion starting point 61 Rising part 62, 562 Free end C2 Colored cutout part D Space part

Claims (5)

A liquid-permeable top sheet positioned on the surface that contacts the human body, a liquid-impermeable back sheet positioned on the surface opposite to the top sheet, and the top sheet and the back sheet are interposed. An absorbent article comprising:
A three-dimensional gather is formed by covering and covering both sides of the folded portion of the backsheet folded back to the topsheet side substantially along the longitudinal both side edges of the absorber,
The region of the top sheet located on the upper surface of the absorber has liquid permeability, and the region covering the back sheet is less likely to transmit liquid than the region located on the upper surface of the absorber. Absorbent article. The absorbent article according to claim 1, wherein the back sheet is in contact with end surfaces of both side edges of the absorbent body. A liquid-permeable top sheet positioned on the surface that contacts the human body, a liquid-impermeable back sheet positioned on the surface opposite to the top sheet, and the top sheet and the back sheet are interposed. An inner absorbent article comprising:
A three-dimensional gather is formed by covering and covering both sides of the folded portion of the backsheet folded back to the topsheet side substantially along the longitudinal both side edges of the absorber,
The region of the top sheet located on the upper surface of the absorber has liquid permeability, and the region covering the back sheet is less likely to transmit liquid than the region located on the upper surface of the absorber. Inner absorbent article. The inner absorbent article according to claim 3, wherein a mark for alignment in the longitudinal direction is formed on the folded portion of the backsheet. The inner absorptivity according to claim 3 or 4, wherein a space portion is provided between the top sheet and the back sheet along the longitudinal direction of both longitudinal edges of the absorbent body. Goods.

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