JP2011072578A - Absorptive article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorptive article, eliminating the time and trouble for separating and discarding a releasing paper, achieving favorable fitting performance in use, and decreasing the time and trouble for deployment. <P>SOLUTION: In this absorptive article 1 used by fixing an outer surface of a back sheet to an adherend, the outer surface of a front surface sheet is provided with gathers along the longitudinal direction of an absorptive body 10. In the outer surface of the back sheet, an adhesive part T to which a pressure sensitive adhesive is applied and a surface lubricant part S treated to be released are alternately formed in one area and in the other area with a longitudinal central area interposed between them. The absorptive body 10 is folded into two with the back sheet inside in the non-use state, so that the adhesive part T of one area and the surface lubricant part S of the other area are bonded opposite to each other. When the one area S1 and the other area opposite to each other are deployed in use, the absorptive body is energized to put the front surface sheet inside by gather sheets 20, 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an absorbent article.

Conventionally, absorbent articles such as urine absorbing pads and sanitary napkins have been widely used.
Such an absorbent article includes a liquid-permeable top sheet, a back sheet, and an absorbent body interposed between the top sheet and the back sheet, and the outer surface of the back sheet is fixed to an adhesive layer or the like. There is a known configuration in which a part is used by being fixed to a wearer's underwear, diaper, or the like.

In the configuration using the adhesive layer as the fixing part as described above, the front sheet is folded inward with the release paper attached to the adhesive layer of the back sheet and stored in wrapping paper, etc. It is common to remove and discard. However, in this case, it takes time and effort to peel off the release paper during use.
Therefore, the outer surface of the back sheet of the absorbent article folded with the top sheet facing in is provided with an adhesive region and a release region, with the adhesive region and the release region of the same or adjacent absorbent article facing each other. There has been proposed an absorbent article that is configured so as not to use release paper or the like by storing (see, for example, Patent Document 1).

JP 2003-159268 A

However, the absorbent article of Patent Document 1 has a problem in that the absorbent article remains folded when stored, so that even if it is unfolded, it does not become horizontal immediately and attachment is not good.
In addition, the absorbent article of Patent Document 1 is folded into four when the adhesive area and the release area of the same absorbent article are stored facing each other, that is, when the individual absorbent article is packaged individually. There is a problem that it takes time to deploy because it is necessary.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an absorbent article that does not require the trouble of peeling off and discarding the release paper, has good attachment properties in use, and has little trouble in deployment.

In order to solve the above problem, the invention according to claim 1 is:
An absorbent main body having a liquid-permeable top sheet, a back sheet, and an absorbent body interposed between the top sheet and the back sheet, and fixing the outer surface of the back sheet to an adherend In the absorbent article to be used,
On the outer surface of the top sheet, a gather is provided along the longitudinal direction of the absorbent main body,
On the outer surface of the back sheet, an adhesive part to which an adhesive is applied and a release part that has been subjected to a release treatment are alternately formed in one area and the other area across the central part in the longitudinal direction,
The absorbent body is
When not in use, the back sheet is folded in two so as to be inside, and the adhesive portion of the one region and the release portion of the other region are in contact with each other,
In use, when the one region and the other region facing each other are developed, the top sheet is urged by the gathers so as to be inside.

The invention according to claim 2 is the absorbent article according to claim 1,
An arc-shaped notch is formed at both ends in the width direction of the central portion in the longitudinal direction of the absorbent main body.

The invention according to claim 3 is the absorbent article according to claim 1 or 2,
A packaging sheet for packaging the absorbent main body when not in use;
The longitudinal end of the packaging sheet is fixed to the top sheet,
The packaging sheet is provided with an elastic member along the longitudinal direction,
When the absorbent main body is deployed, the packaging sheet is contracted and aggregated by the elastic member.

The invention according to claim 4 is the absorbent article according to claim 3,
The longitudinal end portion of the top sheet protrudes outward from the longitudinal end portion of the packaging sheet.

The invention according to claim 5 is the absorbent article according to claim 3 or 4,
The packaging sheet has water repellency.

The invention according to claim 6 is the absorbent article according to claim 3 or 4,
The packaging sheet has hydrophilicity.

According to the present invention, the absorbent main body is folded in two so that the back sheet is inside when not in use, and the adhesive portion in one region and the release portion in the other region are in contact with each other. When the one region and the other region that are opposed to each other are developed at the time of use, the top sheet is urged to be inside by the gather.
For this reason, at the time of accommodation, since the adhesive part and the release part of the opposing region match each other, it is not necessary to use a separate member such as a release paper. Moreover, since it expand | deploys by the urging | biasing force of the direction opposite to the folding at the time of accommodation at the time of use, an absorptive main body tends to become horizontal.
Moreover, since the absorptive main body is a structure folded in two, it can be completely deployed just by opening one place, and there is little effort at the time of deployment.
Therefore, it is possible to provide an absorbent article that does not require the trouble of peeling off and discarding the release paper, has good attachment properties in use, and has little trouble in deployment.

It is a perspective view which shows an example of the state at the time of mounting | wearing of the absorbent article of 1st Embodiment. It is a plane expanded view which shows an example of the surface sheet side of the absorbent article of FIG. It is a plane expanded view which shows an example of the back surface side of the absorbent article of FIG. It is sectional drawing which shows an example of the IV-IV part of FIG. It is a perspective view which shows the state which the absorbent article of FIG. 1 bent. It is a figure for demonstrating the state of an adhesion part and a mold release part at the time of bending the absorbent article of FIG. It is a schematic diagram for demonstrating the effect | action of the absorbent article of FIG. It is a perspective view which shows the state in which the absorbent article of 2nd Embodiment was accommodated. It is a plane expanded view which shows the state which the absorbent article of FIG. 8 expand | deployed. It is a figure which shows the state at the time of use of the absorbent article of FIG.

Hereinafter, embodiments of 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 addition, in the following this embodiment, the inner pad used in preparation inside a disposable paper diaper etc. is illustrated as an absorbent article.
In the following description, the longitudinal direction of the inner pad is defined as the X direction, and the direction orthogonal to the X direction (the width direction of the inner pad) is defined as the Y direction.

(First embodiment)
1st Embodiment of this invention is described based on FIGS.

First, the configuration will be described.
The inner pad 1 includes a main body 10 that is an absorbent main body, a pair of left and right gather sheets 20 and 20, and the like.

  The main body portion 10 is provided on the contact surface side with the human body, and has a liquid-permeable surface sheet 11 that quickly transmits body fluid such as urine and a liquid-impervious surface provided on the side opposite to the contact surface with the human body. A back sheet 12 and an absorbent body 13 interposed between the top sheet 11 and the back sheet 12 are provided.

  Moreover, in the main-body part 10, the abdominal side part 14 is formed in one edge part, and the back | dorsal part 15 is formed in the other edge part so that the crotch part of a human body may be covered from the abdominal side to the back side. . Further, the central region between the abdominal side portion 14 and the back side portion 15 is a crotch portion 16, and the regions on the left and right sides of the crotch portion 16 are positioned around the legs of the wearer when the inner pad 1 is worn. It becomes the leg periphery part 17 which will do.

The top sheet 11 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 topsheet 11, the body fluid is absorbed more quickly, and the dry touch properties are excellent.

  The back sheet 12 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.

As shown in FIG. 3, the outer surface of the back sheet 12 is divided into a central portion M in the X direction, and one region 12A and the other region 12B across the central portion M.
In one region 12A and the other region 12B, adhesive portions S to which an adhesive is applied and release portions T subjected to release treatment are alternately formed along the width direction. The region 12A and the other region 12B can be fastened and separated from each other.

Specifically, in one region 12A, three adhesive portions S1, S2, S3 along the X direction and two mold release portions T1 provided with the three adhesive portions S1, S2, S3 sandwiched therebetween. , T2 are provided. In the other region 12B, there are two adhesive portions S4, S5 along the X direction, and three mold release portions T3, T4, T5 provided across the two adhesive portions S4, S5. Is provided.
As shown in FIGS. 5 and 6, when the main body 10 is bent with the back sheet 12 inside, the three adhesive portions S1, S2, S3 of one region 12A and the three regions 12B of the other region 12B The mold release portions T3, T4, and T5 are opposed to and in contact with each other. At the same time, the two mold release portions T1 and T2 in one region 12A and the two adhesive portions S4 and S5 in the other region 12B are opposed to each other.
Accordingly, the release part T serves to protect the adhesive provided in the adhesive part S when not used (stored). In use, the adhesive part S to which the adhesive has been applied is exposed by peeling the adhesive part S from the release part T, and the main body part 10 is fixed by fixing the adhesive part S to the exterior body. It has become.

The pressure-sensitive adhesive applied to the pressure-sensitive adhesive portion S is, for example, an acrylic adhesive mainly composed of a polyacrylate ester having a generally excellent durability property, and an elastic component of natural rubber or synthetic rubber. It is possible to use rubber-based adhesives, etc., whose main component is a plasticizer and anti-aging agent, etc., and other known adhesives such as hot melt adhesives. is there.
Further, as the release agent applied to the release part T, for example, silicone-based, fluorine-based, isocyanate-based and the like are preferably used. In particular, it is preferable to use a silicone resin-based material applied to the sheet base material of the back sheet 12 by heating and drying, or spraying to form a thin film.

Moreover, as shown in FIG. 4, the edge part of the width direction of the back surface sheet 12 is each turned | folded toward the inner side of the back surface sheet 12, and the surface sheet 11 is pinched | interposed. The folded portion 121 where the back sheet 12 is folded is provided with an adhesive layer (not shown) made of an adhesive such as hot melt, and the folded back and laminated back sheets 12 are bonded to each other.
In addition, you may fold the edge part of the width direction of the back surface sheet 12 to the back surface side on the opposite side to the surface sheet 11, respectively.

The absorbent body 13 absorbs water-like components such as urine as a body fluid when the inner pad 1 is used. The absorbent body 13 absorbs absorbent material 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 13 is formed in a length extending from the abdomen side 14 side to the back side 15 side of the main body 10, and both end portions in the width direction (Y direction) in the longitudinal direction (X direction) central portion of the absorbent body 13. Are formed with arc-shaped cutouts 18, 18.
That is, the width of the portion corresponding to the crotch portion 16, which is substantially the center of the absorbent body 13, is narrower than the portions corresponding to the ventral side portion 14 and the back side portion 15 of the absorbent body 13.
Thus, by forming the arc-shaped cutouts 18 and 18 in the portion corresponding to the crotch part 16 of the absorbent body 13, when the main body 10 is folded into two when not in use (stored). It is easy to bend, and when the main body 10 is attached to the human body, the absorbent body 13 is easily fitted to the crotch (skin portion) of the human body.

The gather sheets 20, 20 are provided from the abdomen side part 14 to the back side part 15 on the back sheet 12 folded back to the top sheet 11 side in the main body part 10. The gather sheets 20 and 20 are formed by folding a liquid-impermeable sheet in half and fixing the folded surface by, for example, hot melt or heat sealing. In the gather sheet 20, the end portion on the folded portion side of the liquid-impermeable sheet folded in half is defined as a free end portion 20a, and the end portion fixed to the back sheet 12 is defined as a fixed end portion 20b.
A plurality of elastic members 21 such as thread rubber and polyurethane fibers are provided substantially in parallel along the longitudinal direction of the gather sheet 20 at the free end 20a of the gather sheet 20. When the gather sheets 20, 20 are fixed to the main body 10, the free end 20 a is erected from the main body 10 to form a three-dimensional gather. And the three-dimensional gather is deformed elastically according to the wearer's body shape by this elastic member 21, and has a structure that is easy to fit the wearer.
The fixed end portion 20b of the gather sheet 20 is fixed to the surface on the side opposite to the top sheet 11 side in the folded portion 121 where the back sheet 12 is folded.

As described above, since the gather sheets 20 and 20 are provided to stand along the X direction on the surface on the surface sheet 11 side at the edge in the Y direction of the main body 10, the surface of the discharged body fluid The body fluid that has not been absorbed by the absorbent body 13 from the sheet 11 and has flowed out to the edge in the width direction of the main body 10 is stopped once, and the flow is diffused in the longitudinal direction to be absorbed by the absorbent body 13. Therefore, the effect of preventing the side leakage of body fluid can be expected.
In particular, the gather sheet 20 is fixed to the folded portion 121 where the back sheet 12 is folded back to the top sheet 11, so that the back sheet 12 together with the gather sheet 20 can block body fluid. The side leakage of body fluid can be prevented more.

Next, the operation will be described.
The main body portion 10 of the inner pad 1 is folded in two so that the back sheet 12 is inside, and is accommodated in a packaging body (not shown). At this time, since the adhesive part S and the release part T of one region 12A are bonded to the release part T and the adhesive part S of the other region 12B, respectively, the release part T is When not in use, the adhesive provided in the adhesive part S is protected.

Further, the main body 10 of the inner pad 1 is unfolded when the region 12A and the region 12B of the back sheet 12 are peeled off during use. At this time, since the gather sheets 20, 20 erected along the X direction are provided on the surface on the surface sheet 11 side at the edge in the Y direction of the main body 10, the sheet is folded into two and stored. When the main body portion 10 is deployed, the topsheet 11 is biased by the gather sheets 20 and 20 so as to be inside.
In particular, as shown in FIG. 7, in the present embodiment, the main body 10 is bent so that the topsheet 11 faces outside when not in use. , The main body 10 is unfolded substantially horizontally.

As described above, according to the inner pad 1 according to the present embodiment, the main body 10 is folded in two so that the back sheet 12 is inside when not in use, and the adhesive portions S1, S2, When S3 and the mold release portions T3, T4, and T5 of the other region 12B are in contact with each other, and the one region 12A and the other region 12B that face each other are unfolded during use, the gather sheet 20 , 20 urges the top sheet 11 to be inside.
For this reason, since it can accommodate, without using separate members, such as release paper, the effort of peeling and discarding release paper can be reduced. Moreover, the cost of release paper can be reduced.
Moreover, since the main-body part 10 is expand | deployed by the urging | biasing force of the direction opposite to the folding at the time of accommodation at the time of use, it is easy to become horizontal and can make attachment property favorable in use.
Moreover, since the main-body part 10 is the structure bent in two, it can be fully developed only by opening one place, and it can be set as the absorbent article with little effort at the time of expansion | deployment.

In addition, according to the inner pad 1 of the present embodiment described above, the arc-shaped cutouts 18 and 18 are formed at both ends in the Y direction at the center in the X direction of the main body 10.
Therefore, it is easy to bend when the main body 10 is folded in two when not in use, and when the main body 10 is attached to the human body, the absorbent body 13 is fitted to the crotch of the human body. It can be made easier.

(Second Embodiment)
Next, the absorbent article of 2nd Embodiment is demonstrated based on FIGS. 8-10.
In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The absorbent article 2 of the present embodiment includes a main body 10a that is an absorbent main body, a pair of left and right gather sheets 20, 20, a packaging sheet 30 that wraps the main body 10a when not in use, and the like. Has been.

As shown in FIG. 8, the packaging sheet 30 is a packaging sheet material for packaging the main body 10a, and is provided so as to cover the outer surface of the topsheet 11 of the main body 10a.
Specifically, when the inner pad 2 is not used, when the main body 10a is folded in two so that the topsheet 11 becomes the outer surface, the packaging sheet 30 stores the folded main body 10a inside. Thus, the body part 10a is packaged by being folded in two and sealing the opposite side parts 31, 31 in the folded state. In addition, when unfolding the main-body part 10a, the seal | sticker of the both-sides 31 and 31 peels.

  The packaging sheet 30 is fixed to one end portion of the surface sheet 11 of the main body portion 10a by a fixing portion 32 to which an adhesive layer is applied, and when the main body portion 10a is expanded as shown in FIG. One end portion in the X direction of the packaging sheet 30 is maintained in a state of being fixed to the top sheet 11.

Further, the packaging sheet 30 is provided with a plurality of elastic members 33 along the X direction. When the main body portion 10a is expanded, the packaging sheet 30 is immediately expanded by the elastic members 33 as shown in FIG. And is concentrated on one end side in the X direction of the topsheet 12.
In addition, it is preferable that the X direction edge part of the surface sheet 11 protrudes outside the X direction edge part of the packaging sheet 30.
By comprising in this way, even if the packaging sheet 30 shrink | contracts when the main-body part 10a is expand | deployed, it can prevent that the shrink | contracted packaging sheet 30 protrudes outside the main-body part 10a.

  The packaging sheet 30 is not particularly limited in thickness and material as long as it can protect the outer surface of the top sheet 11 of the main body 10a when not used, but it is preferably formed extremely thin from the viewpoint of wearing feeling.

Moreover, the packaging sheet 30 may have water repellency or may have hydrophilicity.
Specifically, as the material having water repellency, a sheet material having at least water shielding properties such as polyethylene can be used. Further, a sheet material having moisture permeability is preferable. As a sheet material having this water-impervious property and moisture-permeable property, a sheet is formed by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene. Then, a microporous sheet material obtained by stretching in a uniaxial or biaxial direction is preferably used.
When the packaging sheet 30 is formed of a sheet material having water repellency, the packaging sheet 30 can be damped when the body fluid reaches the front of the human body on the top sheet 11, so that the packaging sheet 30 can be used as a leakage prevention sheet. it can.

Moreover, as what has hydrophilic property, it is formed with the perforated or non-porous nonwoven fabric, a porous plastic sheet, etc. 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 the packaging sheet 30 is formed of a sheet material having hydrophilicity, it can be absorbed when the body fluid reaches the front of the human body on the top sheet 11, so that the packaging sheet 30 is used as an auxiliary sheet that promotes absorption. Can be used.

  As described above, according to the inner pad 2 according to the present embodiment, the packaging sheet 30 is fixed to the top sheet 11 and the main body portion 10a is unfolded, as well as the same effect as the first embodiment can be obtained. In this case, since the packaging sheet 30 is naturally contracted and aggregated by the elastic member 33, it is possible to reduce the trouble of peeling and discarding the packaging sheet 30.

Moreover, according to the inner pad 2 of this embodiment demonstrated above, the X direction edge part of the surface sheet 11 protrudes outside the X direction edge part of the packaging sheet 30. FIG.
Therefore, when the main body portion 10a is expanded, the shrunk packaging sheet 30 is concentrated on the portion of the top sheet 11 that protrudes from the packaging sheet 30 and is compact.

  Moreover, according to the inner pad 2 of this embodiment demonstrated above, the packaging sheet 30 has water repellency. In this case, the packaging sheet 30 can be used as a leakage prevention sheet.

  Moreover, according to the inner pad 2 of this embodiment demonstrated above, the packaging sheet 30 has hydrophilicity. In this case, the packaging sheet 30 can be used as an absorption assisting sheet.

It should be noted that the present invention is not limited to the first and second embodiments described above, and it is needless to say that specific detailed structures can be appropriately changed.
For example, the number and the shape of the adhesive part S and the release part T are not limited as long as the two regions 12A and 12B match each other when the back sheet 12 is bent. For example, in the first and second embodiments described above, the adhesive portion S and the release portion T are described as being along the X direction, but may be formed along the Y direction. Moreover, the number of the adhesion part S and the mold release part T may be four or more.
In the first and second embodiments, the back sheet 12 is described as being formed of a liquid-impermeable sheet material. However, even if a liquid-permeable sheet material is used. good.

  Moreover, in the said 1st, 2nd embodiment, although the inner pad was illustrated and demonstrated as an absorbent article, this invention is not limited to this, For example, even if it applies to a sanitary napkin etc. good.

1, 2 Inner pad (absorbent article)
10, 10a Body (absorbent body)
11 Top sheet 12 Back sheet M Central part 12A area S (S1, S2, S3) Adhesive part T (T1, T2) Release part 12B area S (S4, S5) Adhesive part T (T3, T4, T5) Release Part 121 Folding part 13 Absorber 14 Abdominal side part 15 Back side part 16 Crotch part 17 Leg circumference part 18 Notch 20 Gather sheet 20a Free end part 20b Fixed end part 21 Elastic member 30 Packaging sheet 31 Side part 32 Fixed part 33 Elasticity Element

Claims (6)

An absorbent main body having a liquid-permeable top sheet, a back sheet, and an absorbent body interposed between the top sheet and the back sheet, and fixing the outer surface of the back sheet to an adherend In the absorbent article to be used,
On the outer surface of the top sheet, a gather is provided along the longitudinal direction of the absorbent main body,
On the outer surface of the back sheet, an adhesive part to which an adhesive is applied and a release part that has been subjected to a release treatment are alternately formed in one area and the other area across the central part in the longitudinal direction,
The absorbent body is
When not in use, the back sheet is folded in two so as to be inside, and the adhesive portion of the one region and the release portion of the other region are in contact with each other,
In use, when the one region and the other region which are opposed to each other are developed, the absorbent article is urged by the gathers so that the topsheet becomes inside.   The absorbent article according to claim 1, wherein arc-shaped notches are formed at both ends in the width direction of the central portion in the longitudinal direction of the absorbent main body. A packaging sheet for packaging the absorbent main body when not in use;
The longitudinal end of the packaging sheet is fixed to the top sheet,
The packaging sheet is provided with an elastic member along the longitudinal direction,
The absorbent article according to claim 1 or 2, wherein when the absorbent main body is deployed, the packaging sheet is contracted and aggregated by the elastic member.   The absorbent article according to claim 3, wherein a longitudinal end portion of the topsheet protrudes outward from a longitudinal end portion of the packaging sheet.   The absorbent article according to claim 3 or 4, wherein the packaging sheet has water repellency.   The absorbent article according to claim 3 or 4, wherein the packaging sheet has hydrophilicity.

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