JP4425038B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article particularly used as a urine-absorbing pad, an incontinence pad, etc., and to an absorbent article having a good wearing feeling while improving the side leakage prevention effect of body fluid due to three-dimensional gathers.

  Conventionally, as an absorbent article used particularly for urine absorption pads and incontinence pads, a cotton sheet is formed between a back sheet such as a polyethylene sheet or a polylaminate nonwoven fabric and a nonwoven fabric and a top sheet such as a nonwoven fabric or a liquid-permeable plastic sheet. What intervened the absorber which consists of pulp etc. is known.

On the other hand, also in this kind of absorbent article, various measures are taken in order to prevent leakage of body fluid. For example, in Patent Document 1 below, as shown in FIG. 4, a disposable paper diaper 30 is proposed in which an absorbent body 32 is interposed in a three-dimensional gather 31 to prevent side leakage of body fluid. Further, in Patent Document 2 below, as shown in FIG. 5, both side portions 41 </ b> A and 41 </ b> A of the absorber 41 are erected on the surface side, and the front end portions 41 a of the folded side portions 41 </ b> A are folded back to the side again. Thus, an absorbent article 40 in which occurrence of leakage in the lateral direction is reduced has been proposed.
JP 2000-271169 A JP 2002-291804 A

  However, in the case of the disposable paper diaper 30 described in Patent Document 1, a separate absorber 32 must be interposed in the three-dimensional gather 31, so that there is a problem that the manufacturing process becomes complicated and the manufacturing cost is increased.

  On the other hand, in the absorbent article 40 of Patent Document 2, side leakage can be prevented even if there is a large amount of body fluid due to the standing upright absorber, but the overlapping portions of the absorber are thick at the front and rear portions of the absorber. In addition, it becomes hard and uncomfortable for the wearer, and there is also a problem that the absorber is difficult to bend because the absorber has high rigidity.

  Furthermore, in these cases, since both of the covering sheets covering both surfaces of the standing absorbent body are liquid permeable, body fluid may pass through and a side leak may occur, and the outer part of the three-dimensional gathers Therefore, when used as an inner of a paper diaper, there is a problem in that it takes time to fold or fold the side flap at the time of mounting, which takes time for mounting.

  Therefore, the main problem of the present invention relates to an absorbent article having an absorbent body in a three-dimensional gather portion, improving the side leakage prevention effect of the body fluid by the three-dimensional gather, improving the wearing feeling, and in addition, manufacturing and processing It is an object of the present invention to provide an absorbent article having effects such as being easy to attach to outerwear such as disposable diapers.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and standing three-dimensional gathers are formed on both sides of the front side. In absorbent articles,
In the side part of the absorber, a gathered nonwoven fabric is continuously joined laterally from the side edge of the back sheet, and an elastic elastic member is disposed along the longitudinal direction at the tip of the gathered nonwoven fabric, Both side portions of the back sheet are folded to the front side together with both side portions of the absorbent body, and the thickness of the folded portion on both side portions of the absorbent body is formed thinner than the thickness of the non-folded portion of the central portion of the absorbent body , and Groove-shaped embossing is formed along the bending position,
The groove-shaped embossed position is set as a folding position, and both longitudinal ends of the bent portion obtained by folding both side portions of the absorber to the surface side are bonded to the upper surface of the liquid-permeable surface sheet together with both side portions of the back sheet. As a result, the three-dimensional gather is formed in the crotch region in the lower half portion of the base end side of the three-dimensional gather with the bent absorbent body, and the gathered nonwoven fabric is elastic in the upper half portion. There is provided an absorbent article having a structure in which a barrier standing substantially vertically is formed by the stretching force of the stretching member.

  In the present invention described in claim 1, both side portions of the back sheet are bent to the front side together with both side portions of the absorber, and the absorber constitutes a part of the three-dimensional gather. Accordingly, the body fluid can be reliably absorbed by the standing absorber portion, and side leakage can be prevented. In addition, the absorbent body of the three-dimensional gather part is easy to manufacture because it is formed by bending the absorber side part of the main body, and the side sheet is wrapped around the side part of the three-dimensional gather, so that side flaps are provided outside the three-dimensional gather. It is not formed and can be easily mounted when used as an inner such as a paper diaper.

  In the present absorbent article, the thickness of the bent portion of the absorber is formed thinner than the thickness of the non-bent portion of the absorber central portion, so that it can be easily bent and the front and rear of the absorber. Since it is not necessary to increase the thickness of the superposed part of the absorber so much in the part, it is possible to reduce a sense of incongruity when being worn.

  Further, the lower half portion of the three-dimensional gather has a structure in which a barrier is formed together with the folded absorbent body, and the upper half portion has a structure in which a barrier is formed by the gathered nonwoven fabric. Therefore, since the adherence to the body is improved by the followability by the barrier by the gathered nonwoven fabric, it is possible to reliably prevent side leakage from the gap.

  As a second aspect of the present invention, the bent portions on both side portions of the absorbent body are thinner than the thickness of the unfolded portion in the central portion of the absorbent body due to the compression by embossing and / or the reduction of the amount of pulp pile. An absorbent article according to claim 1 is provided. In order to reduce the thickness of the bent portions on both sides of the absorbent body, it can be achieved by compression by embossing and / or by reducing the amount of pulp pile.

  As the present invention according to claim 3, there is provided the absorbent article according to claim 1, wherein the back sheet is a liquid-impervious sheet and extends to the middle of the standing part of the three-dimensional gather. Since the liquid-impervious back sheet extends to the middle of the standing part of the three-dimensional gather, the body fluid that tries to pass through the three-dimensional gather absorber can be completely blocked.

  As described above in detail, according to the present invention, the absorbent article having the absorbent body in the three-dimensional gather part can improve the side leakage prevention effect of the body fluid by the three-dimensional gather and improve the wearing feeling. Furthermore, it is possible to produce effects such as easy manufacture and processing and easy attachment to an outer such as a disposable diaper.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a developed view of a urine absorbing pad 1 according to the present invention, and FIG. 2 is a view taken along the line II-II in FIG.

  The urine absorbing pad 1 includes a back sheet 2 (in this embodiment, a plastic sheet) made of a plastic sheet such as a polyethylene sheet or a non-woven fabric, and bodily fluids such as excretions such as urine generated during incontinence. A liquid-permeable surface sheet 3 that allows quick permeation, an absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between the two sheets, and the absorbent body 4 surrounding the absorbent body 4 in the illustrated example. The crepe paper 5 provided for maintaining the shape and improving the diffusibility, and a pair of left and right three-dimensional gathers BS, BS provided protruding from the surface side, and around the absorber 4 In the illustrated example, the back sheet 2 and the liquid-permeable surface sheet 3 are joined at the front and rear end edges thereof by an adhesive such as hot melt or an adhesive means such as heat seal. A pad of substantially rectangular shape.

Hereinafter, the structure of the urine absorbing pad 1 will be described in detail.
As the back sheet 2, a sheet material having at least water shielding properties such as polyethylene is used, but in recent years, a material having moisture permeability tends to be used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used.

  Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. As the material fibers constituting the nonwoven fabric, in addition to olefins such as polyethylene or polypropylene, polyesters, polyamides, and other synthetic fibers, regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used. Nonwoven fabric obtained by an appropriate processing method such as a method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, or an air through method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft.

  In addition, when a large number of through holes are formed in the liquid permeable surface sheet 3, body fluids such as urine and other excretions are quickly absorbed, and the dry touch property is excellent. .

  The absorbent body 4 is not particularly limited as long as it can absorb and retain bodily fluids. Usually, a fluffy pulp mixed with a water-absorbing polymer powder is preferably used from the viewpoint of the absorption function and cost. The absorbent body 4 is preferably surrounded by crepe paper 5 as shown in the figure in order to maintain the shape.

  In the three-dimensional gather BS, both side portions of the back sheet 2 are bent to the front side together with both side portions of the absorber 4, and the absorber 4 constitutes a part of the three-dimensional gather (lower half portion on the base end side). In addition, the thickness of the bent portions on both sides of the absorber is formed to be thinner than the thickness of the non-bent portions in the central portion of the absorber.

Hereinafter, it will be described in detail together with the formation procedure,
As shown in FIG. 3 (A), the gathered nonwoven fabric 7 is joined to the side of the absorber 4 continuously from the side edge of the back sheet 2 to the side. The gathered nonwoven fabric 7 has its tip portion folded back twice, and an elastic stretchable member 6 is disposed along the longitudinal direction at the tip of the folded portion. As the gathered nonwoven fabric 7, in order to prevent the body fluid from flowing out to the side, the material itself has water repellency, or an appropriate coating such as a silicon-based, paraffin-based, or alkylchromic chloride-based water repellent. It is desirable to use a non-woven fabric material that has been subjected to water repellent treatment.

Next, in the next step, as shown in FIG. 3B, both side portions 4a of the absorbent body 4 are made thinner than other portions by compression by planar embossing, and the boundary portion (bending position) ), A groove-like emboss 4b is formed by linear embossing. In addition, you may perform the thinning of the said absorber both sides 4a by reducing the amount of fiber piles of the both sides 4a at the time of manufacture of the absorber 4. FIG. Even in this case, it is desirable to form the groove-like emboss 4b. Here, the thickness H ₁ of the absorbent body side portions 4a may be thinner than the thickness of H ₂ non folded part of the absorbent body center portion. Specifically, the thickness H1 is ₁ to 20 mm, preferably 1 to 5 mm.

  Next, as shown in FIG. 4B, the groove-like emboss 4b position is set as a bending position, and both side portions of the back sheet 2 and both side portions of the absorbent body 4 are bent to the front side. By adhering both longitudinal ends of the portion to the upper surface of the liquid-permeable surface sheet 3, as shown in FIG. 3 (C), the three-dimensional gather BS has a lower half on the base end side of the three-dimensional gather BS in the crotch region. In the portion, a barrier is formed together with the folded absorbent body 4, and in the upper half portion, the gathered nonwoven fabric 7 is formed with a barrier erected by the elastic force of the elastic elastic member 6.

  In the three-dimensional gather BS configured as described above, the back sheet 2 entrains the side edge of the absorber 4 and extends to the middle of the upright portion of the three-dimensional gather BS, so that the three-dimensional gather BS tries to pass through. Since the body fluid is completely blocked and no flaps are formed on the side portions, it can be easily attached when used as an inner such as a disposable diaper.

  Moreover, since the thickness of the bent portion 4a of the absorber 4 is formed thinner than the thickness of the non-bent portion in the central portion of the absorber, it can be easily bent, and at the front and rear portions of the absorber. Since it is not necessary to increase the thickness of the overlapping portion of the absorber, it is possible to reduce a sense of incongruity at the time of wearing.

  Furthermore, the three-dimensional gather BS according to the present invention has a structure in which a barrier is formed by the absorbent body 4 in the lower half portion and a barrier is formed by the gathered nonwoven fabric 7 in the upper half portion. Is secured by the following ability of the barrier formed by the gathered nonwoven fabric 7. On the other hand, as shown in FIGS. 4 and 5, in the case of a conventional three-dimensional gather in which the absorber is disposed over the entire standing section from the base end to the tip of the three-dimensional gather, A gap is easily formed between them, and body fluid may leak out from the gap.

[Other examples]
(1) In the above embodiment, the case where the present invention is applied to the urine absorbing pad 1 has been described. However, the present invention can be similarly applied to sanitary napkins, panty liners, incontinence pads, and the like. it can.
(2) In the above embodiment, a liquid-impervious plastic sheet is used as the back sheet 2, but a liquid-impervious sheet is disposed on the back side of the absorber 4 as a leak-proof sheet, and the outer surface side thereof is further provided. May be covered with a nonwoven fabric. Moreover, when using as an inner of a paper diaper, it does not need to be liquid-impermeable and this back surface sheet 3 is good also as a liquid-permeable nonwoven fabric.

It is an expanded view of the pad 1 for urine collection which concerns on this invention. It is the II-II arrow directional view of FIG. (A)-(C) is a procedure figure showing the formation point of solid gather BS. It is a cross-sectional view of the conventional disposable paper diaper 30. It is a cross-sectional view of the conventional absorbent article 40.

  DESCRIPTION OF SYMBOLS 1 ... Pad for urine collection, 2 ... Back surface sheet, 3 ... Liquid-permeable surface sheet, 4 ... Absorber, 4a ... Both sides of (absorber), 4b ... Groove embossing, 5 ... Crepe paper, 6 ... Elastic expansion and contraction 7 ... Gathered nonwoven fabric, BS ... 3D gather

Claims (3)

In the absorbent article in which an absorbent body is interposed between the liquid-permeable surface sheet and the back surface sheet, and standing three-dimensional gathers are formed on both sides of the surface side,
In the side part of the absorber, a gathered nonwoven fabric is continuously joined laterally from the side edge of the back sheet, and an elastic elastic member is disposed along the longitudinal direction at the tip of the gathered nonwoven fabric, Both side portions of the back sheet are folded to the front side together with both side portions of the absorbent body, and the thickness of the folded portion on both side portions of the absorbent body is formed thinner than the thickness of the non-folded portion of the central portion of the absorbent body , and Groove-shaped embossing is formed along the bending position,
The groove-shaped embossed position is set as a folding position, and both longitudinal ends of the bent portion obtained by folding both side portions of the absorber to the surface side are bonded to the upper surface of the liquid-permeable surface sheet together with both side portions of the back sheet. As a result, the three-dimensional gather is formed in the crotch region in the lower half portion of the base end side of the three-dimensional gather with the bent absorbent body, and the gathered nonwoven fabric is elastic in the upper half portion. An absorptive article characterized by having a structure in which a barrier standing substantially vertically is formed by a stretching force of a stretching member.   2. The absorption according to claim 1, wherein the bent portions on both side portions of the absorber are formed thinner than the thickness of the non-bent portion in the central portion of the absorber due to compression by embossing and / or reduction of the amount of pulp pile. Sex goods.   The absorbent article according to claim 1, wherein the back sheet is a liquid-impermeable sheet and extends to the middle of the upright portion of the three-dimensional gather.

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