JP2014240026A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article that can be easily attached and can reduce body fluid from leaking.SOLUTION: When using an inner pad 1, elastic members 19 are contracted as a release sheet 30 is peeled from an adhesive member 20 and adhesive members 21, 21 to contract regions R on both sides of a back sheet 10b, thereby applying tension on a center side in the width direction of the back sheet 10b on which the adhesive member 20 is provided. This allows the center side of the back sheet 10b to be kept flat, and prevents the adhesive member 20 from sticking to each other when peeling the release sheet 30 from the inner pad 1. Further, the inner pad 1 can be appropriately bonded on a predetermined object (such as an underwear and a disposable paper diaper) without adhesiveness of the adhesive member 20 and the adhesive members 21, 21 being impaired, allowing a user to easily attach the inner pad in a crotch part. Leaking of body fluid can be therefore reduced by appropriately attaching the inner pad 1.

Description

  The present invention relates to an absorbent article.

2. Description of the Related Art Conventionally, absorbent articles such as disposable paper diapers, urine pads, and sanitary napkins having an absorbent body interposed between a top sheet and a back sheet have been used.
And by providing an adhesive temporary adhesive part on the surface of the back sheet of the inner pad, which is an absorbent article, and using the inner pad adhered to the inner surface of the underwear or diaper, the wearer can move actively Even if it exists, what prevented the inner pad from shifting | deviating from an appropriate mounting position is known (for example, refer patent document 1).

JP 2004-89270 A

However, since the inner pad is used by attaching it to a narrow crotch part, it may be compressed at the crotch at the time of wearing, and the temporary bonding part may adhere to the inner pad before bonding to the underwear or diaper. It was.
If the temporary bonding parts of the inner pads stick to each other, it becomes difficult to bond the inner pads to the undergarment or diaper and the adhesive strength is reduced. There is a risk that body fluid leaks easily occur.

  An object of the present invention is to provide an absorbent article that is easy to wear and can reduce body fluid leakage.

In order to solve the above problems, the invention described in claim 1
In an absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body interposed between the top sheet and the back sheet,
The absorbent crotch portion located on the center side in the longitudinal direction of the absorbent body and located between the wearer's crotch is formed narrower than the width of both end portions in the longitudinal direction of the absorbent body,
One first adhesive member is provided on the surface in the width direction center side of the back sheet corresponding to the absorbent crotch part,
A pair of second adhesive members disposed on the surface in the width direction center side of the back sheet corresponding to each of both ends in the longitudinal direction of the absorbent body so as to sandwich the first adhesive member in the width direction. Is provided,
An elastic member for contracting the back sheet in the width direction is provided on both sides of the back sheet with the first adhesive member interposed therebetween.

The invention according to claim 2 is the absorbent article according to claim 1,
A release sheet that protects the first adhesive member and the second adhesive member until the first adhesive member and the second adhesive member are bonded to a predetermined object;
The release sheet includes a cover portion that covers a region where the elastic member is provided on the back sheet, and the cover portion is peeled off from the first adhesive member and the second adhesive member. The region is supported so as not to shrink.

The invention according to claim 3 is the absorbent article according to claim 2,
An auxiliary pressure-sensitive adhesive member that is temporarily bonded to the cover portion is provided on the surface of the back sheet in the region until the release sheet is peeled from the first pressure-sensitive adhesive member and the second pressure-sensitive adhesive member. Features.

Invention of Claim 4 is an absorbent article as described in any one of Claims 1-3,
In the absorber, embossed recesses are respectively provided in portions corresponding to both sides of the first adhesive member.

The invention according to claim 5 is the absorbent article according to any one of claims 1 to 3,
In the absorber, slits are respectively provided in portions corresponding to both sides of the first adhesive member.

According to the first aspect of the present invention, the back sheet on which the first adhesive member is provided by contracting both sides of the back sheet sandwiching the first adhesive member with the contraction of the elastic member in the absorbent article. Since the tension is applied to the center side in the width direction and the center side of the back sheet is kept flat, the first adhesive members provided on the back sheet surface do not stick to each other.
And since the center side of the back sheet of the absorbent article is kept flat, the first adhesive member of the back sheet can be appropriately adhered to a predetermined object (for example, an underwear or a disposable paper diaper). The wearer can easily wear the absorbent article between the crotch.
In particular, since the first adhesive members in the absorbent article do not stick to each other, the adhesiveness of the first adhesive member is not reduced. And it becomes possible to adhere | attach the absorptive article provided with the 1st adhesion member which has favorable adhesiveness firmly to a predetermined | prescribed target object, it can make it difficult to shift | deviate an absorptive article from a mounting position, and body fluid leaks Can be reduced.
In addition, the second adhesive member is provided on the stomach side and the back side of the back sheet of the absorbent article, and the amount of the adhesive member in the absorbent article is increased, thereby strongly bonding the absorbent article to a predetermined object. And the absorbent article can be made more difficult to shift from the predetermined mounting position.

According to the invention described in claim 2, the adhesiveness of the first adhesive member and the second adhesive member until the first adhesive member and the second adhesive member are adhered to a predetermined object (for example, an underwear or a disposable paper diaper). The area in which the elastic member is provided on the back sheet by the cover portion of the release sheet until the release sheet is peeled from the first adhesive member and the second adhesive member. It can be supported so as not to shrink.
And when using the absorbent article, the release sheet is peeled off from the first adhesive member and the second adhesive member, and the release sheet is peeled off from the absorbent article, so that both sides of the back sheet provided with the elastic member are removed. The region can be shrunk to give tension to the center side of the back sheet on which the first adhesive member is provided.

  According to the invention of claim 3, since the auxiliary adhesive member that is temporarily bonded to the cover portion of the release sheet is provided on the surface of the back sheet in the region where the elastic member is provided, the release sheet Until the first adhesive member and the second adhesive member are peeled off, the auxiliary adhesive member can assist the cover part of the release sheet so as not to contract the regions on both sides of the back sheet by the adhesive force. .

  According to invention of Claim 4, even if the shrinkage | contraction force of an elastic member may be added also to an absorber by shrink | contracting the area | region of the both sides of a back seat | sheet, the center side of the absorber between embossing recessed parts is It is difficult to deform and can maintain a shape that easily fits the body. As a result, body fluid leakage from the absorbent article can be reduced.

According to the invention described in claim 5, when the regions on both sides of the back sheet contract, the contraction force of the elastic member is applied to the absorber, so that the absorber is filled so as to fill the gap of the slit of the absorber. It is easy to lean toward the center in the width direction. Then, the absorbent body approaches the center side in the width direction so as to fill the gap of the slit, so that the width of the absorbent crotch part of the absorbent body can be easily adjusted according to the size of the wearer's crotch. The body is easy to fit. In addition, body fluid such as urine is easily diffused in the longitudinal direction of the absorber through the gap of the slit.
As a result, body fluid leakage from the absorbent article can be reduced.

It is a front view which shows the inner pad in this embodiment. It is a reverse view which shows the inner pad in this embodiment. It is sectional drawing in the III-III line of FIG. It is a back view of the state which peeled off the peeling sheet from the inner pad. It is sectional drawing in the VV line of FIG. It is a perspective view which shows the inner pad which peeled off the peeling sheet. It is a back view which shows the modification of an inner pad. It is a back view which shows the modification of an inner pad. It is a back view which shows the modification of an inner pad. It is sectional drawing in the XX line of FIG. It is a back view which shows the modification of an inner pad. It is sectional drawing in the XII-XII line | wire of FIG.

Hereinafter, specific embodiments of the absorbent article according to the present invention will be described in detail with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.
In the present embodiment, as an absorbent article, an inner pad used in an underwear or a disposable paper diaper will be described as an example.

FIG. 1 is a front view of a state in which the inner pad in the present embodiment is developed. 2 is a rear view of the inner pad, and FIG. 3 is a cross-sectional view taken along line III-III in FIG.
4 is a back view of the state where the release sheet is peeled from the inner pad, and FIG. 5 is a cross-sectional view taken along the line V-V in FIG. FIG. 6 is a perspective view showing the inner pad from which the release sheet has been peeled off.

  As shown in FIGS. 1 to 6, the inner pad 1 that is an absorbent article includes an inner pad body 10 and a pair of left and right gather sheets 11, 11 provided on the top sheet 10 a side of the inner pad body 10. ing. In addition, the unused inner pad 1 has a release sheet 30 provided on the back sheet 10 b side of the inner pad main body 10.

The inner pad main body 10 is provided on the contact surface side with the human body, and has a liquid-permeable top sheet 10a that allows permeation of body fluid such as urine and the liquid-impervious property provided on the opposite side to the contact surface with the human body. It is comprised by the back sheet | seat 10b and the absorber 12 etc. interposed between these back sheet | seats 10b and the top sheet | seat 10a.
Further, in the inner pad main body 10, an abdominal side portion 14 is formed at one end portion and a back side portion 15 is formed at the other end portion so as to cover the crotch portion of the human body from the abdominal side to the back side. ing. Further, a crotch portion 16 is formed between the abdominal side portion 14 and the back side portion 15.

The absorbent body 12 absorbs water-like components such as urine as a body fluid when the inner pad 1 is used. The absorbent body 12 absorbs absorbent materials such as cotton and pulp, super absorbent polymer (SAP), It is formed by combining with a sheet-like substrate such as fiber or film.
The absorbent body 12 is formed to have a length extending from the side of the abdomen 14 to the back 15 of the inner pad main body 10, and the absorbent crotch 12 a on the center side in the longitudinal direction of the absorbent 12 is the absorbent 12. It is formed narrower than the width of both ends. That is, the portion corresponding to the crotch portion 16 on the substantially central side of the absorbent body 12 is formed to be narrower than the portions corresponding to the abdominal side portion 14 and the back side portion 15 that are both ends of the absorbent body 12, so It has the shape of The absorbent crotch portion 12a is located between the crotch of the wearer when the inner pad 1 (inner pad main body 10) is worn on the human body.
Thus, the inner pad 1 is attached to the human body by forming the width of the absorbent crotch portion 12a of the absorbent body 12 corresponding to the crotch portion 16 of the inner pad body 10 narrower than both longitudinal end portions thereof. When it does, the absorber 12 becomes easy to fit a human body in the crotch (skin part) of a human body.

The top sheet 10a is formed of a perforated or non-porous nonwoven fabric, a porous plastic sheet, or the like. As the raw material fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. In addition, as a method for producing the nonwoven fabric, a known method can be appropriately used. For example, the nonwoven fabric is obtained by a spunlace method, a spunbond method, a thermal bond method, a melt blow method, a needle punch method, or a combination of these methods. Can be manufactured.
When a large number of through holes are formed in the top sheet 10a, the body fluid is absorbed more quickly, and the dry touch property is excellent.

The back sheet 10b is formed of a sheet material having at least water shielding properties such as polyethylene. Moreover, it is preferable that it is a sheet material which has moisture permeability (breathability) from a viewpoint of stuffiness prevention, and as a sheet material which has this water-imperviousness and moisture permeability, it is inorganic filling in olefin resin, such as polyethylene and a polypropylene. A microporous sheet material obtained by melting and kneading the agent to form a sheet and then stretching in a uniaxial or biaxial direction is suitably used.
As shown in FIG. 3, the end portions in the width direction of the back sheet 10b are folded back toward the inside of the back sheet 10b, for example, so as to sandwich the top sheet 10a. The sheet 10b portion is fixed to the top sheet 10a.

Moreover, the adhesive member 20 is provided in the thin layer form on the surface of the width direction center side of the back sheet | seat 10b. The adhesive member 20 is provided on the surface of the back sheet 10b corresponding to at least the absorbent crotch portion 12a. Here, the adhesive member 20 is provided from the abdominal side portion 14 to the back side portion 15.
When the inner pad 1 is used, the adhesive member 20 has a function of preventing the inner pad 1 from being displaced from an appropriate mounting position by being adhered to the inner surface of an undergarment or a disposable paper diaper. A release sheet 30 for protecting the adhesive member 20 is provided so that the adhesiveness does not deteriorate until the adhesive member 20 is adhered to the inner surface of the undergarment or disposable paper diaper.
The pressure-sensitive adhesive used as the material of the pressure-sensitive adhesive member 20 is not particularly limited. For example, any form of pressure-sensitive adhesive such as a hot-melt pressure-sensitive adhesive, an emulsion-based pressure-sensitive adhesive, a solvent-based pressure-sensitive adhesive, an oligomer-based pressure-sensitive adhesive, or a solid pressure-sensitive adhesive. An agent may be used. An adhesive can be used individually or in combination of 2 or more types.

Further, a plurality (five in this embodiment) of elastic members 19 are provided on both sides of the back sheet 10b sandwiching the adhesive member 20 at positions corresponding to the absorbent crotch portion 12a in the back sheet 10b. They are provided substantially in parallel along the direction intersecting the longitudinal direction.
The elastic member 19 is made of, for example, thread rubber, polyurethane fiber or the like, and is fixed to the surface of the back sheet 10b in an extended state, and is provided so as to contract the back sheet 10b in the width direction.

The release sheet 30 adheres to the adhesive member 20 until the adhesive member 20 provided from the stomach side portion 14 to the back side portion 15 of the back sheet 10b is adhered to a predetermined object (for example, an underwear or a disposable paper diaper). It is provided to protect the pressure-sensitive adhesive member 20 so as not to deteriorate the performance.
Moreover, the peeling sheet 30 has the cover part 30a which covers the area | region R in which the elastic member 19 was provided in the back sheet | seat 10b. The cover portion 30a supports the region R of the back sheet 10b provided with the elastic member 19 so as not to contract until the release sheet 30 is peeled from the adhesive member 20. Therefore, it is preferable that the release sheet 30, particularly the cover portion 30 a, is made of a relatively rigid material so as to suppress the contraction of the elastic member 19 (region R). The cover portion 30a of the release sheet 30 and the back sheet 10b in the region R where the elastic member 19 is provided are bonded by a temporary bonding portion (not shown), and the temporary bonding portion is removed when the release sheet 30 is peeled off. The cover 30a is peeled off.
When the release sheet 30 is peeled from the inner pad 1, the back sheet 10 b shrinks in the width direction as the elastic member 19 shrinks.

The gather sheets 11, 11 are provided on the back sheet 10 b folded back to the top sheet 10 a side in the inner pad body 10 from the abdomen side part 14 to the back side part 15. The gather sheets 11 and 11 are formed by folding a liquid-impermeable sheet in half and fixing the folded surfaces by, for example, hot melt or heat sealing. In the gather sheet 11, the end portion on the side of the folded portion obtained by folding the liquid-impermeable sheet in half is defined as a free end portion 11a and the end portion fixed to the back sheet 10b is defined as a fixed end portion 11b.
A gathering elastic member 18 such as a plurality of thread rubbers and polyurethane fibers is provided in the free end portion 11 a of the gather sheet 11 along the longitudinal direction of the gather sheet 11 in a substantially parallel manner. In a state where the gather sheets 11 and 11 are fixed to the inner pad main body 10, the free end portion 11 a is erected from the inner pad main body 10 to form a three-dimensional gather. Then, the gathered elastic member 18 allows the three-dimensional gather to be stretched and deformed in accordance with the wearer's body shape, so that the wearer can easily fit.

  Next, the effect that the elastic member 19 contracts when the release sheet 30 is peeled when the inner pad 1 is used will be described.

In the unused inner pad 1, a release sheet 30 is provided to protect the adhesive member 20 on the backsheet 10 side, and the cover portion 30 a of the release sheet 30 is a backsheet provided with an elastic member 19. It supports so that the area | region R of 10b may not shrink | contract.
The inner pad 1 from which the release sheet 30 has not been peeled has a relatively flat shape, as shown in FIGS. 1 to 3, and the inner pad 1 is, for example, a predetermined number of three folds. What is enclosed in a packaging bag is displayed at a retail store or the like.

When the inner pad 1 is used, when the release sheet 30 is peeled off from the adhesive member 20 and the release sheet 30 is peeled off from the inner pad 1, the elastic member 19 contracts as shown in FIGS. The region R of the backsheet 10b provided with the elastic member 19 contracts. Specifically, when the elastic member 19 contracts, the back sheet 10b contracts in the width direction so that the regions R on both sides of the back sheet 10b are drawn toward the absorber crotch portion 12a side of the absorber 12.
Then, as the region R of the backsheet 10b contracts, the inner pad 1 is close to the three-dimensional shape at the time of use in accordance with the end of the backsheet 10b being drawn to the absorber crotch portion 12a of the absorber 12. It changes into a shape.

In particular, the elastic member 19 contracts and the end of the back sheet 10b is drawn toward the absorber crotch part 12a, and the back sheet 10b in the drawn region R contracts in the width direction, whereby the adhesive member 20 is provided. The center side of the back sheet 10b is relatively widened in the width direction.
That is, since the elastic member 19 contracts and the regions R on both sides of the back sheet 10b contract, the center side of the back sheet 10b is relatively expanded in the width direction, and thus the adhesive member 20 is provided. The center side of the back sheet 10b is kept flat.
By contracting the regions R on both sides in the width direction of the back sheet 10b in this way, tension is applied to the center side of the back sheet 10b, and the center side in the width direction of the back sheet 10b is kept flat. Adhesive members 20 are not bonded to each other because the back sheet 10b provided is loosened.

As described above, the inner pad 1 has a pressure-sensitive adhesive member due to the shrinkage of the region R on both sides of the back sheet 10b as the elastic member 19 contracts in accordance with the peeling of the release sheet 30 from the pressure-sensitive adhesive member 20 during use. Since the tension is applied to the center side in the width direction of the back sheet 10b provided with 20 and the center side of the back sheet 10b is kept flat, the adhesive member 20 is removed when the release sheet 30 is peeled off from the inner pad 1. There is no sticking together.
The center side of the back sheet 10b of the inner pad 1 from which the release sheet 30 has been peeled is kept flat, and the adhesive member 20 of the back sheet 10b is appropriately applied to a predetermined object (for example, an underwear or a disposable paper diaper). The wearer can easily attach the inner pad 1 to the crotch.
In particular, when the inner pad 1 is used, since the adhesive members 20 do not stick to each other after the release sheet 30 is peeled from the adhesive member 20, the adhesiveness of the adhesive member 20 may be reduced. Absent. And it becomes possible to adhere | attach the inner pad 1 provided with the adhesive member 20 which has favorable adhesiveness firmly to an undergarment or a disposable paper diaper, and it can make the inner pad 1 difficult to slip | deviate from a mounting position, and body fluid leaks. Can be reduced.

  The present invention is not limited to the above embodiment.

For example, as shown in FIG. 7, an adhesive member (first adhesive member) 20 is provided on the surface of the center side in the longitudinal direction of the back sheet 10 b, and the back side of the back sheet 10 b. Adhesive members (second adhesive members) 21, 21 that are paired with a predetermined amount in the width direction of the back sheet 10 b may be provided on the back side portion 15 and the back side portion 15, respectively.
Thus, by providing the adhesive members 21 and 21 on the abdominal side portion 14 and the back side portion 15 of the back sheet 10b of the inner pad 1a and increasing the amount of the adhesive member in the inner pad 1a, the inner pad 1a is treated as a predetermined target. An object (for example, an underwear or a disposable paper diaper) can be strongly adhered, and the inner pad 1a can be further prevented from shifting from a predetermined mounting position.

Further, as shown in FIG. 8, in addition to the adhesive member 20 and the adhesive members 21 and 21, an auxiliary adhesive member 22 may be provided on the surface of the back sheet 10b in the region R where the elastic member 19 is provided.
The auxiliary pressure-sensitive adhesive member 22 is temporarily bonded to the cover portion 30a until the release sheet 30 is peeled off from the pressure-sensitive adhesive member 20, and the cover portion 30a does not contract the region R of the back sheet 10b due to the adhesive force. It plays an effect of assisting support.
Thus, by providing the auxiliary adhesive member 22 in the region R of the back sheet 10b of the inner pad 1b, the cover part 30a of the release sheet 30 assists in supporting the elastic member 19 (region R) against contraction. It is possible to support the inner pad 1b before use so that the region R of the backsheet 10b does not shrink more reliably.

Further, as shown in FIGS. 9 and 10, embossed recesses 12 b may be provided in portions corresponding to both sides of the adhesive member 20 at positions corresponding to the absorber crotch portion 12 a in the absorber 12. .
Thus, by providing the embossed concave portion 12b in the absorbent crotch portion 12a of the absorbent body 12 in the inner pad 1c, when the inner pad 1c is used, the release sheet 30 is peeled off from the adhesive member 20 when the inner pad 1c is used. Even if the contraction force of the elastic member 19 is applied to the absorbent body 12 due to the shrinkage of the regions R on both sides of the sheet 10b, the central side of the absorbent body 12 between the embossed recesses 12b is not easily deformed. A shape that fits easily can be maintained. As a result, body fluid leakage from the inner pad 1c can be reduced.

Moreover, as shown in FIGS. 11 and 12, slits 12 c may be provided at portions corresponding to both sides of the adhesive member 20 at positions corresponding to the absorber crotch portion 12 a in the absorber 12.
Thus, by providing the slit 12c in the absorber crotch portion 12a of the absorbent body 12 in the inner pad 1d, the backsheet is separated from the adhesive member 20 when the inner pad 1d is used. By contracting the regions R on both sides of 10b, the contraction force of the elastic member 19 is applied to the absorber 12, so that the absorber 12 tends to move toward the center in the width direction so as to fill the gap of the slit 12c. .
And the absorber 12 approaches the center side of the width direction so that the clearance gap between the slits 12c may be filled, and it becomes easy to adjust the width | variety of the absorber crotch part 12a of the absorber 12 according to a wearer's inseam size. Therefore, the absorbent body 12 has a shape that is easy to fit on the body. In addition, body fluid such as urine is easily diffused in the longitudinal direction of the absorbent body 12 through the gap of the slit 12c. As a result, body fluid leakage from the inner pad 1d can be reduced.

  In the above embodiment, the adhesive member is protected by the single release sheet 30, but the present invention is not limited to this. For example, in the case of the inner pad 1b, the adhesive member 20 is used. The release sheet for protecting the adhesive members 21 and 21 and the release sheet corresponding to the cover portion 30a for protecting the auxiliary adhesive member 22 may be provided separately.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

1, 1a-1d Inner pad (absorbent article)
DESCRIPTION OF SYMBOLS 10 Inner pad main body 10a Top sheet 10b Back sheet 11 Gather sheet 12 Absorber 12a Absorber crotch part 12b Embossed recessed part 12c Slit 19 Elastic member 20 Adhesive member (1st adhesive member)
21 Adhesive member (second adhesive member)
22 Auxiliary adhesive member 30 Release sheet 30a Cover part R area

Claims (5)

In an absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body interposed between the top sheet and the back sheet,
The absorbent crotch portion located on the center side in the longitudinal direction of the absorbent body and located between the wearer's crotch is formed narrower than the width of both end portions in the longitudinal direction of the absorbent body,
One first adhesive member is provided on the surface in the width direction center side of the back sheet corresponding to the absorbent crotch part,
A pair of second adhesive members disposed on the surface in the width direction center side of the back sheet corresponding to each of both ends in the longitudinal direction of the absorbent body so as to sandwich the first adhesive member in the width direction. Is provided,
An absorbent article, characterized in that elastic members for contracting the back sheet in the width direction are provided on both sides of the back sheet with the first adhesive member interposed therebetween. A release sheet that protects the first adhesive member and the second adhesive member until the first adhesive member and the second adhesive member are bonded to a predetermined object;
The release sheet includes a cover portion that covers a region where the elastic member is provided on the back sheet, and the cover portion is peeled off from the first adhesive member and the second adhesive member. The absorbent article according to claim 1, wherein the region is supported so as not to shrink.   An auxiliary pressure-sensitive adhesive member that is temporarily bonded to the cover portion is provided on the surface of the back sheet in the region until the release sheet is peeled from the first pressure-sensitive adhesive member and the second pressure-sensitive adhesive member. The absorptive article according to claim 2 characterized by things.   The absorbent article according to any one of claims 1 to 3, wherein embossed recesses are provided in portions corresponding to both sides of the first adhesive member in the absorbent body.   The absorbent article according to any one of claims 1 to 3, wherein a slit is provided in each of the absorbent body corresponding to both sides of the first adhesive member.

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