JP4548956B2 - Absorbent articles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article such as an incontinence pad, a sanitary napkin, or a disposable diaper having excellent deodorizing performance and excellent wearing feeling and / or leakage prevention performance.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, an absorbent article such as an incontinence pad is known in which a sheet-like material containing a deodorant such as activated carbon is disposed at a predetermined location to reduce malodor caused by absorbed urine, body fluid, or the like. .
However, in such an absorbent article, although the deodorizing performance is improved, there is a problem that the fitting property and the absorption performance are lowered, and the wearing feeling and the leakage prevention performance are deteriorated.
[0003]
Accordingly, a first object of the present invention is to provide an absorbent article that is excellent in deodorizing performance and that is excellent in wearing feeling and / or leakage prevention performance.
The second object of the present invention is a deodorant laminated sheet for imparting deodorant performance to an absorbent article, which is excellent in deodorant performance, rich in flexibility, and inhibits the absorbent performance of the absorbent article. It is to provide a laminated sheet that is difficult to perform.
[0004]
[Means for Solving the Problems]
The present invention includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent core that is formed between the two sheets and is substantially vertically long. A deodorant laminated sheet is arranged so as to cover the front and back surfaces of the core and both side surfaces in the longitudinal direction, and the laminated sheet comprises a deodorant-containing sheet containing a deodorant and the deodorant-containing sheet. A sheet having a predetermined width in which the deodorant-containing sheet is not interposed between the two covering sheets in a portion covering the surface of the absorbent core. The first object is achieved by providing an absorbent article having a belt-like region (hereinafter, the first invention is referred to as the present invention).
[0005]
Further, the present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet and an absorbent core interposed between both sheets, and the absorbent article formed substantially vertically, A deodorant laminated sheet is arranged so as to cover the front and back surfaces of the absorbent core and both side surfaces in the longitudinal direction, and the laminated sheet contains a deodorant-containing sheet containing a deodorant and the deodorizer The deodorizer-containing sheet between the two coated sheets, in a portion covering both side surfaces in the longitudinal direction of the absorbent core. The first object is achieved by providing an absorbent article having a belt-like region having a predetermined width that is not interposed (hereinafter, the second invention is referred to as the present invention).
[0006]
In addition, the present invention has a deodorant-containing sheet containing a deodorant and two covering sheets that respectively cover the front and back surfaces of the deodorant-containing sheet, The deodorant-containing sheet is not interposed over the entire surface, and the erasing agent is interposed between the two covering sheets between the one side portion and the other side portion facing the one side portion. The second object is achieved by providing a laminated sheet in which a band-shaped region having a predetermined width in which no odorant-containing sheet is interposed (hereinafter referred to as the third invention, Say).
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on preferred embodiments.
An incontinence pad 1 as one embodiment of the first and second inventions is worn together with a mounting tool such as shorts or a mounting cover. As shown in FIGS. 1 and 2, a liquid-permeable topsheet 2. A liquid-impermeable back sheet 3 and an absorbent core 4 interposed between the two sheets 2 and 3 are provided and are formed substantially vertically long.
[0008]
The incontinence pad 1 and the absorbent core 4 each have a vertically long plan view shape in which both side portions in the longitudinal direction are formed in a substantially straight line shape and both end portions are formed in a substantially arc shape. The top sheet 2 and the back sheet 3 extend outward in the longitudinal direction from both end portions of the absorbent core 4, and are joined to each other at the extending portions. The top sheet 2 covers both side surfaces in the longitudinal direction of the absorbent core 4, and both side portions of the top sheet 2 are joined to the back sheet 3 on the back side of the absorbent core 4.
[0009]
As for the absorptive core 4, the front and back and the both sides of a longitudinal direction are covered with the deodorizing laminated sheet. That is, as shown in FIG. 2, the absorbent core 4 is surrounded by the deodorant laminated sheet 5 on the entire circumference of the cross section in the width direction. In addition, the surface of the absorptive core 4 is a surface turned to a wearer's skin side at the time of wear.
The laminated sheet 5 in this embodiment is disposed so as to cover only the front and back surfaces of the absorbent core 4 and both side surfaces in the longitudinal direction in the central region C in the longitudinal direction of the incontinence pad 1. The central area C in the incontinence pad 1 is a part arranged in the excretion part of the wearer when worn.
The laminated sheet in the absorbent article of the present invention may cover the front and back surfaces of the absorbent core and both side surfaces in the longitudinal direction over the entire lengthwise direction of the absorbent core, as in the present embodiment. Furthermore, only the front and back surfaces of the absorbent core and both side surfaces in the longitudinal direction in a part of the absorbent core in the longitudinal direction may be covered. However, it is preferable that the front and back surfaces of the absorbent core and both side surfaces in the longitudinal direction are covered with a laminated sheet at least at the site disposed in the excretion part of the wearer when worn.
[0010]
The laminated sheet 5 in the present embodiment is also a preferred embodiment of the laminated sheet of the third invention. As shown in FIGS. 2 and 3, the deodorant-containing sheet 51 containing a deodorant and the deodorant It consists of two covering sheets 52 and 53 covering the front and back surfaces of the containing sheet 51. The covering sheets 52 and 53 cover the front and back surfaces of the deodorant-containing sheet 51 and prevent the deodorant in the sheet 51 from leaking out of the laminated sheet 5 from the front and back surfaces of the sheet 51.
[0011]
The laminated sheet 5 in the present embodiment has two sheets each on a portion covering the surface of the absorbent core 4 and a portion covering both side surfaces in the longitudinal direction of the absorbent core 4 (surfaces directed in the left-right direction in FIG. 2). The strips 5A and 5B having a predetermined width in which the deodorant-containing sheet 51 is not interposed are provided between the covering sheets 52 and 53.
[0012]
More specifically, a pair of belt-like regions 5A disposed on the portion covering the surface of the absorbent core 4 are provided along the longitudinal direction on both sides in the longitudinal direction of the incontinence pad 1, and each of the incontinence pads 1 is provided. It is curved in a convex shape toward the inner side in the width direction and is formed in a continuous curve shape. The belt-like region 5A may be provided in a straight line shape, but a curved shape is preferable because the fit property is improved.
The width W1 of the belt-like region 5A (width in the direction perpendicular to the center line of the belt-like region 5A) W1 is preferably 1 to 10 mm, particularly 2 to 5 mm, from the viewpoint of improving fit and preventing odor leakage.
[0013]
Moreover, the laminated sheet 5 forms the bending part of a product, and the deodorizer containing sheet | seat 51 in the part which covers the basic weight in 5 A of strip | belt-shaped area | regions, and the surface of the absorptive core 4 from a viewpoint of aiming at the improvement of fit property. There difference between the basis weight of a portion which is interposed, 10 g / m ² or more, and particularly preferably 20 to 50 g / m ^2.
[0014]
In the incontinence pad 1 of the present embodiment, the grooves 6 are formed on the strip-like regions 5A arranged in the portion covering the surface of the absorbent core 4. The groove 6 is a groove formed by compressing the topsheet 2 and the absorbent core 4 from the topsheet 2 side, and more specifically, pressing means such as a convex roll provided with a convex portion for groove formation. In use, a large number of recesses are formed in a line at predetermined intervals. By forming the groove 6 on the belt-like region 5A, the incontinence pad 1 can be more easily deformed, and the fit and leakproofness are further improved.
[0015]
The band-like regions 5B arranged on the portions covering both side surfaces of the absorbent core 4 are formed in continuous straight lines so as to extend in the longitudinal direction of the absorbent core 4 along both side surfaces of the absorbent core 4. Yes.
The width (width in the direction perpendicular to the center line of the belt-like region 5A) W2 of the belt-like region 5B is 1 to 10 mm, particularly 2 from the viewpoint of improving fit by reducing compression resistance and sufficient deodorizing performance. It is preferably ˜5 mm.
The band-like region 5A and the band-like region 5B are formed over the front and rear end portions (front and rear end portions arranged before and after the incontinence pad 1) 54 and 55 in the laminated sheet 5, respectively.
[0016]
Further, in the laminated sheet 5 in the present embodiment, one side portion 5a and the other side portion 5b along the longitudinal direction of the absorbent core 4 are overlapped with each other at the center portion in the width direction on the back surface side of the absorbent core 4. The deodorant-containing sheet 51 is not interposed over the entire side portion 5a disposed at least on the upper side (the back sheet side) of the overlapping portion. Since the deodorant-containing sheet 51 is not interposed in the one side portion 5a arranged on the upper side, the deodorant is introduced from both sides of the laminated sheet 1 during the manufacturing process of the incontinence pad 1 or during use of the incontinence pad 1. It is possible to effectively prevent the dropout.
The width W3 of the side portion 5a in which the deodorant-containing sheet 51 is not interposed is preferably 3 to 50 mm, particularly 5 to 20 mm, from the viewpoint of preventing the deodorant from falling off and sufficient deodorization performance.
Note that the one side portion 5a and the other side portion 5b of the laminated sheet 5 may or may not be joined, but in the present embodiment, they are joined by an adhesive, heat fusion, or the like.
[0017]
Further, in the laminated sheet 5 in the present embodiment, the two covering sheets 52 and 53 in the belt-like region 5A are joined with an adhesive, and slits or holes are formed in the belt-like region 5A. (Not shown).
By forming such slits or holes in the band-like region 5A that covers the surface side of the absorbent core 4, the absorption performance of the incontinence pad (absorbent article) can be improved.
Such slits or holes are preferably formed so as to penetrate the band-like region 5A in the thickness direction, and are preferably arranged in a large number dispersed in the band-like region 5A. Furthermore, it is preferable that each slit or each hole has a length or a diameter of 1 to 5 mm. The direction of the slit may be either the longitudinal direction or the width direction of the incontinence pad (absorbent article).
[0018]
The laminated sheet 5 in the present embodiment includes a plurality of (five) deodorant-containing sheets 51a to 51e and two covering sheets that cover the front and back surfaces (both sides) of these deodorant-containing sheets 51a to 51e. 52, 53.
[0019]
The covering sheets 52 and 53 have substantially the same rectangular outer shape, and the five deodorant-containing sheets 51a to 51e have a predetermined gap formed between adjacent deodorant-containing sheets. Are arranged in this order in the direction surrounding the absorbent core 4 (in the left-right direction in FIG. 3). Therefore, in the laminated sheet 5, the deodorant-containing sheet 51 is not interposed between the one side part 5a along the longitudinal direction of the incontinence pad 1 and the other side part 5b facing the one side part 5a. Band-like regions 5A and 5B having a width are formed.
Further, the outer edge edges of the deodorant-containing sheets 51 a and 51 e do not reach the side edge edges 56, 56 in the same direction of the two covering sheets 52, 53, and the one along the longitudinal direction of the incontinence pad 1. The side part 5a and the other side part 5b opposite to the one side part 5a are not respectively provided with a deodorant-containing sheet over the entirety thereof.
[0020]
Each deodorant-containing sheet 51 in the present embodiment is mainly composed of a deodorant and a fiber raw material.
As the deodorant, various known deodorants can be used, and examples thereof include activated carbon, porous polymer, silica gel, zeolite, and montmorillolites. In particular, activated carbon exhibiting high adsorptivity to bad odors and other gaseous substances is preferable. When using activated carbon as a deodorant, the content rate of the activated carbon in a deodorant containing sheet | seat becomes like this. Preferably it is 1 to 50 weight%, More preferably, it is 3 to 30 weight%. When granular activated carbon is used, the average particle size is preferably 0.1 to 50 μm, particularly preferably 1 to 20 μm, and the specific surface area is 500 to 2000 m ² / g, particularly 1000 to 1500 m ² / g. Preferably there is.
[0021]
As the fiber raw material, known natural fibers such as wood pulp such as NBKP and LBKP and non-wood pulp such as straw and cotton can be preferably used. Further, for the purpose of improving the sheet strength, synthetic fibers such as polyethylene fibers may be used in combination.
The content of the fiber raw material in the deodorant-containing sheet is preferably 50 to 99% by weight, more preferably 70 to 97% by weight.
[0022]
In the deodorant-containing sheet 51, the deodorant is preferably dispersed substantially uniformly over the entire surface of each sheet. In addition, the thickness of the deodorant-containing sheet 51 may be appropriately set according to the type of absorbent article, the arrangement form in the absorbent article, etc., preferably 0.1 to 2.0 mm, more preferably 0.2 to 0.5 mm.
[0023]
As the covering sheets 52 and 53, a sheet material made of a fiber material, for example, paper, nonwoven fabric, or the like is used. As the fiber raw material in the case of paper, the same material as the deodorant-containing sheet 51 can be used. Moreover, as a nonwoven fabric, well-known nonwoven fabrics, such as a spunlace nonwoven fabric and a spun bond nonwoven fabric, can be used, for example.
The covering sheets 52 and 53 may be the same or different in material and thickness. The thicknesses of the covering sheets 52 and 53 may be appropriately set according to the type of absorbent article, the arrangement form in the absorbent article, etc., but preferably 0.1 to 2.0 mm, more preferably 0. .2 to 0.5 mm.
[0024]
The deodorant-containing sheet 51 and the covering sheets 52 and 53 can be laminated and integrated by, for example, making paper or bonding using an adhesive or the like.
[0025]
The absorbent core 4 in the present invention is a part that retains absorbed liquid such as urine and body fluid, and various known materials conventionally used for absorbent articles can be used as the forming material.
The absorptive core 4 in this embodiment consists of a fiber assembly and a water absorbing polymer. As the fiber raw material constituting the fiber assembly, for example, natural cellulose such as wood pulp and cotton, and cellulosic fibers such as regenerated cellulose such as rayon and cupra are preferable, but thermoplastic fiber filaments, staple fibers, and the like may also be used. it can. The fiber assembly may be in the form of a nonwoven fabric.
[0026]
As the water-absorbing polymer, various conventionally known polymers can be used, and those capable of absorbing and holding a liquid 20 times or more of its own weight and capable of gelling are preferable. Preferable examples of the water-absorbing polymer include polyacrylic acid and a salt thereof, and a polyacrylate graft polymer such as starch, crosslinked carboxylmethylated cellulose, a polymer or a copolymer of acrylic acid or an alkali metal acrylate. be able to.
[0027]
In addition, in the incontinence pad 1 of this embodiment, the solid guard 7 is provided in the longitudinal direction both sides. Each of the three-dimensional guards 7 has a top sheet 2 and a back sheet 3 formed on the back side of the absorbent core 4 on the other side of the three-dimensional guard-forming sheet material 71 having an elastic member (not shown) on one side. The other part of the sheet material 71 is arranged so as to rise obliquely toward the inside of the incontinence pad 1 and the upper part of the rising part is outwardly connected by a folding line along the longitudinal direction. This incontinence is formed by fixing the folded portion at both ends in the longitudinal direction of the incontinence pad 1 together with the elastic member on the surface sheet 2 and contracting the elastic member existing at the free end. The pad 1 is in a boat shape shown in FIG. 1 in a natural state.
[0028]
In addition, as the surface sheet 2, the back surface sheet 3, the three-dimensional guard forming sheet material 71, the elastic member, and the like in the incontinence pad 1 of the present embodiment, they are conventionally used for incontinence pads, sanitary napkins, disposable diapers, and the like, respectively. Various known ones can be used.
[0029]
The absorbent article of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the first invention, a belt-like region 5A having a predetermined width in which the deodorant-containing sheet 51 is not interposed may be formed only in a portion covering the surface of the absorbent core 4, and the belt-like region 5A. May be formed in a continuous straight line instead of a curved curve convex inward in the absorbent article width direction. Two or more strip-shaped regions 5A may be provided.
In the second invention, a band-like region having a predetermined width in which the deodorant-containing sheet 51 is not interposed may be formed only in the portions covering both side surfaces of the absorbent core 4. The belt-like region 5A may be formed in a curved shape.
[0030]
In addition, the belt-like regions 5A and 5B having a predetermined width in the first to third inventions are not limited to continuous ones, for example, regions having a predetermined shape in which no deodorant-containing sheets are interposed are arranged at predetermined intervals. It may be arranged in the shape of a band having a predetermined width as a whole.
The absorbent article according to the first and second inventions is an incontinence pad, a sanitary napkin, a disposable diaper, a sheet for handling a cage, and the like, a pants-type disposable diaper, and an unfolded disposable. It may be a diaper or the like.
Moreover, the laminated sheet in the first to third inventions may be further laminated with another sheet, or may be sandwiched between two or more other sheet materials.
[0031]
【The invention's effect】
According to the absorbent article of the first invention, the deodorant laminated sheet can reduce malodor caused by absorbed urine, body fluid, and the like, and an excellent deodorizing performance can be obtained. Further, since the absorbent article is easily bent along a band-shaped region having a predetermined width in which no deodorant-containing sheet is interposed, the fitting property at the time of wearing is improved. It is possible to suppress a decrease in absorption performance that accompanies performance. Therefore, it is excellent not only in deodorizing performance but also in wearing comfort and leakage prevention performance.
[0032]
According to the absorbent article of the second invention, the deodorant laminated sheet can reduce malodor caused by absorbed urine, body fluid, and the like, and an excellent deodorizing performance can be obtained. In addition, the presence of a band-like region having a predetermined width in which no deodorant-containing sheet is present can prevent or reduce strong resistance to compression in the width direction and a sense of discomfort (such as a feeling of tingling). Therefore, not only the deodorizing performance but also an excellent wearing feeling can be obtained.
[0033]
According to the laminated sheet of the third invention, since it has a belt-like region having a predetermined width that is flexible and easy to bend and does not include the deodorant-containing sheet, the portion is arranged in a portion that requires flexibility and bendability. By doing, the deodorizing performance excellent in the absorbent article can be provided, suppressing a fall in fit property, absorption performance, etc. In addition, since the deodorant-containing sheet is not present at least on one side, the deodorant in the deodorant-containing sheet is produced during the production process of the laminated sheet and the absorbent article using the laminated sheet. , It can be prevented from falling off from both sides of the laminated sheet.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an incontinence pad as an embodiment of the present invention (first and second inventions).
FIG. 2 is a diagram illustrating a cross section taken along line XX of FIG. 1 with a part (solid guard) omitted.
3 is a plan view showing the laminated sheet used for the incontinence pad in FIG. 1 with a part broken away.
[Explanation of symbols]
1 Incontinence pad (absorbent article)
2 Top sheet 3 Back sheet 4 Absorbent core 5 Laminated sheet 51 Deodorant-containing sheet 52 Cover sheet 53 Cover sheet 6 Groove 7 Solid guard C Central region

Claims (2)

In an absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet and an absorbent core interposed between both sheets, and formed substantially vertically long,
A deodorant laminated sheet is arranged so as to cover the front and back surfaces of the absorbent core and both side surfaces in the longitudinal direction,
The laminated sheet is formed by combining a deodorant-containing sheet containing a deodorant and two covering sheets covering the front and back surfaces of the deodorant-containing sheet, and integrating the absorption sheet. In a portion covering both side surfaces in the longitudinal direction of the adhesive core, the deodorant-containing sheet is not interposed between the two covering sheets, and has a belt-like region ,
The absorptive article whose thickness of each said covering sheet is 0.1-0.5 mm . In the laminated sheet, one side portion and the other side portion along the longitudinal direction of the absorbent core are overlapped, and at least on one side portion arranged on the upper side of the overlapped portion, the absorbent article of claim 1 Symbol placement deodorant-containing sheet is not interposed.

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