JP3928518B2 - Absorbent articles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article that is suitably used at low cost without leakage when used in a lateral position.
[0002]
[Prior art]
A general absorbent article is composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body sandwiched between both sheets. Pant-type diapers, tape-type diapers that fasten the back and abdomen to the wearer's body with tape, etc., and are placed inside underwear, pants-type diapers, and tape-type diapers. Urine pads are known. These absorbent articles have a configuration of left and right targets and a leak prevention measure against leakage in all directions so that the wearer may excrete in any posture.
[0003]
However, some wearers may sleep only in the lateral position in one direction because the spine is bent or there is paralysis on one side. Since such a wearer urinates in a lateral position in only one direction, there is a case where the wearer is preferentially wet only from one side in the longitudinal direction of the absorbent article. In this case, the upper part of the wearer in the sleeping position is not used and remains unused, whereas the lower part has a problem that excrement is pushed many times and cannot be absorbed and leaks. It was.
[0004]
In order to solve such a problem, a U-shaped disposable auxiliary absorbent formed in a half-pants-like object is disclosed (Japanese Patent Laid-Open No. 2001-340370). However, in this publication, the absorbent article is limited to the auxiliary pad, and one leg opening is formed by the fastening tape or the joint portion of the wearer side. For this reason, when the wearer wears this auxiliary pad and further uses a deployment-type disposable diaper or a pants-type disposable diaper, a double fastening tape or an adhesive part is placed on the wearer's side where the wearer lies on the lower side while lying down. There was a problem that it would exist, causing pressure on the skin and causing blurring and pressure ulcers. Also, even when the fastening tape or adhesive part is on the crotch, in order to stabilize the sleeping position, the person who sleeps sideways often sleeps with his legs crossed, and still presses the crotch and around the legs. There was a problem of causing cabbage and pressure ulcers.
[0005]
[Problems to be solved by the invention]
In view of the current situation, the present inventors, in an absorbent article comprising a liquid-permeable top sheet, a back sheet, and an absorbent body disposed between these two sheets, a portion that hits the lower side of the wearer in the sleeping position It was concluded that it was important to provide preventive measures for leakage.
Moreover, it came to the conclusion that it is effective to change the structure of an absorbent article as a leak prevention measure in case excrement approaches in only one direction.
In addition, it is concluded that there is no need for a leak prevention measure for the part where excrement does not flow, and that it is necessary to eliminate excess items in order to provide absorbent articles at low cost. It came.
In addition, it came to the conclusion that it was necessary to eliminate the extra parts on the part where the wearer's body pressure is applied and to have a clean shape.
[0006]
The object of the present invention is to prevent wear even when excrement flows in only the same direction for a wearer who is known to be used in a lateral position in only one direction. An object of the present invention is to provide an absorbent article that is excellent in use and is suitably used.
[0007]
[Means for Solving the Problems]
A first aspect of the present invention is an absorbent article comprising a liquid-permeable top sheet, a back sheet, and an absorbent body disposed between both sheets, and a three-dimensional gather is disposed on the side of the absorbent body. The absorbent article is characterized in that the shape of the three-dimensional gather is different on the left and right with respect to the longitudinal center line of the absorbent article.
[0010]
According to a second aspect of the present invention, a leg gather is disposed on the absorbent body side of the absorbent article, and the shape of the leg gather is different on the left and right with respect to the longitudinal center line of the absorbent article. It is an absorptive article given in the 1st invention .
[0011]
According to a third aspect of the present invention, in the first or second aspect, the absorbent article is a disposable diaper in which a waist opening and a pair of left and right leg openings are formed when worn. It is an absorbent article of description.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The absorbent article of the present invention is characterized by the shape of the absorbent article. By making the absorbent article into a shape where leakage prevention measures are mainly applied only in one direction with respect to the longitudinal center line of the absorbent article, Even if excrement flows in only the same direction for a wearer who is known to be used in a lateral position only in the direction, it can be suitably used without causing leakage.
In addition, by not taking too much leakage prevention measures on the side where excrement does not flow, it is possible to provide an absorbent article that can be manufactured at low cost without using extra materials and is excellent in economic efficiency.
[0013]
The surface sheet used in the present invention is a hydrophilic or hydrophobic nonwoven fabric, woven fabric, porous plastic film or the like, and the constituent fibers thereof are single fibers such as polypropylene, polyethylene, polyester and nylon, or polyester and polypropylene. In addition, a composite fiber composed of two or more components such as polyethylene and nylon is particularly preferable from the viewpoint of strength, although polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers are not particularly limited.
The top sheet need not be composed of a single sheet, and may be composed of a plurality of sheets such as changing the sheet between the upper surface of the absorber and the side flaps. In addition, when the front sheet is composed of a plurality of sheets, each sheet may use a different material, but the same material may be used.
[0014]
The back sheet used in the present invention may be a liquid-impermeable film such as polyethylene, a liquid-impervious film and a nonwoven fabric, a liquid-impermeable film and a woven fabric, or the like. A liquid-permeable hydrophilic or hydrophobic nonwoven fabric, woven fabric, porous plastic film, or the like similar to the top sheet may be used.
[0015]
The absorber used in the present invention is made of cotton-like pulp, a superabsorbent polymer (hereinafter abbreviated as SAP), a hydrophilic sheet or the like, and is not particularly limited.
Moreover, the absorber used in this invention is made from the well-known absorbent material normally used for the conventional disposable diaper and other absorbent articles. That is, it is formed from a single-layer or multi-layer mat made of absorbent fibers such as cotton-like pulp and rayon, and is further wrapped with a hydrophilic sheet. In general, SAP is mixed uniformly in each mat or arranged in layers between the mats. Moreover, you may heat-press by mixing 3-60 mass% heat-fusible substance with respect to cotton-like pulp. Alternatively, only SAP may be wrapped with a hydrophilic sheet.
[0016]
As the cotton-like pulp, a chemical pulp sheet or a fiber length of 5 mm or less obtained by defibrating a mechanical pulp sheet with a pulverizer is used. Pulp raw materials are not limited to conifers, but hardwoods, straw, bamboo and kenaf are also applicable. In addition, waste paper pulp may be used. The amount of use of the cotton-like pulp varies depending on the intended absorber, for example, whether it is used singly, or a plurality of layers are laminated, or another absorbent is used in combination. 400 g / m ² .
[0017]
Examples of SAP include starch, cellulose, and synthetic polymer. Namely, starch-acrylic acid (salt) graft copolymer, saponified product of starch-ethyl acrylate graft copolymer, saponified product of starch-methyl methacrylate graft copolymer, saponified product of starch-acrylonitrile graft copolymer Saponified starch-acrylamide graft copolymer, acrylic acid (salt) polymer, polyethylene oxide cross-linked with acrylic acid, cross-linked product of sodium carboxymethyl cellulose, cross-linked product of polyvinyl alcohol-maleic anhydride reaction product, etc. It is. Among these, those that absorb urine, body fluids and water more than 20 times their own weight, and sodium polyacrylate are most suitable from the viewpoint of absorption performance. The amount of SAP distributed is 10 to 500 parts by weight, preferably 15 to 300 parts by weight, based on 100 parts by weight of the dried cotton-like pulp, and such an amount of SAP is substantially uniformly distributed in the cotton-like pulp, or , Sprayed in a part. When SAP absorbs urine and body fluids and swells, the particles have minimal mutual interference and are less likely to come into continuous contact to form a permeation barrier, passing through urine and body fluids in a three-dimensional direction. Absorb.
[0018]
The hydrophilic sheet may be a hydrophilic sheet such as tissue, absorbent paper, and hydrophilic nonwoven fabric.
As a compression method of the absorbent body, it may be compressed into a continuous surface shape so that the density of the absorbent body is substantially uniform over the whole by a roll having a smooth circumferential surface, or the circumferential surface is uneven. Depending on the roll or the like, the density of the absorbent body may be partially different, and compression may be performed so as to be embossed in a pattern arrangement that guides urine and body fluid in the longitudinal direction and the oblique direction. In the case of embossing, the compression part and the non-compression part may be either continuous or discontinuous.
[0019]
The shape of the absorbent body may be rectangular or hourglass type, and any of the commonly used known shapes of conventional disposable diapers and other absorbent articles may be used, but the shape is not particularly limited. In particular, it is possible to take measures such as increasing the amount of absorption in the lower part when the lateral position is reached or increasing the area.
Further, a diffusion layer such as a second sheet may be provided on at least a part of the absorber. By providing a diffusion layer, it is possible to prevent leakage of urine, body fluid, etc. without reducing the absorption rate of urine, body fluid, etc., even when the space under the top sheet is not sufficiently provided due to the posture of the wearer, etc. It becomes possible.
[0020]
The second sheet is a hydrophilic liquid-permeable non-woven fabric, woven fabric, porous plastic, cotton-like pulp, etc., and its constituent components may be polypropylene, polyethylene, polyester, rayon, pulp, or composite fibers thereof. Not receive. For pulp, crimped fibers such as curly cellulose fibers are effective. The second sheet is disposed between the top sheet and the absorber in order to enhance the liquid diffusibility, and is adhered and fixed to the absorber with an adhesive or the like. Alternatively, when the second sheet is a sheet-like material such as a hydrophilic liquid-permeable nonwoven fabric, woven fabric, or porous plastic, the second sheet may be disposed on the top surface of the top sheet and bonded and fixed with an adhesive or the like.
[0021]
The three-dimensional gather is formed by a sheet and an elastic member. The sheet may be formed of a center surface sheet or a side surface sheet (side sheet) which is a surface sheet, but may be a second sheet or another member. These may be partially bonded together. That is, it is formed from a surface sheet, a side sheet, or a sheet of another member bonded to these.
[0022]
The material of the three-dimensional gather sheet is a hydrophilic or hydrophobic nonwoven fabric, woven fabric, porous plastic film, etc., and the constituent fibers of the woven fabric and nonwoven fabric are single fibers such as polypropylene, polyethylene, polyester, nylon, or polyester, It is a composite fiber composed of two or more components such as polypropylene, polyethylene, nylon and the like, and polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers are particularly preferred in terms of strength, but are not particularly limited. .
[0023]
As the elastic member, a thread, string, net, or flat shape such as natural, synthetic rubber, or urethane is used according to the installation position. The arrangement of the elastic member is fixed to the sheet with an adhesive or the like.
As an adhesion method, hot-melt, starch-based or water-soluble glue such as CMC (carboxymethylcellulose) or an adhesive having high fluidity may be used, or welding by heat or ultrasonic waves may be used.
[0024]
【Example】
Hereinafter, although a deployment type disposable diaper which is one example of the present invention is explained in detail with reference to drawings, the present invention is not limited to these.
FIG. 1 is a partially cutaway plan view of a deployable disposable diaper. In FIG. 1, the disposable diaper includes an absorbent body 3 disposed between a liquid-permeable top sheet 1 and a liquid-impermeable back sheet 2, and a side flap 4 is formed by a sheet portion extending from the absorbent body 3. ing. The disposable diaper comprises a back side portion 11, a crotch portion 12 and an abdominal side portion 13. When the diaper is worn, the back side portion is connected via a coupling means 10 attached to the width direction side edge portion of the back side portion 11 side flap 4. 11 and the abdominal side part 13 are joined, and a waist circumference opening part and a pair of leg circumference opening part are formed. In addition, three leg-hole elastic members 5 are arranged at the positions of the leg-hole openings at the crotch part, and the waist-around elastic members 6 are provided at the positions of the waist-hole openings of the abdomen side portion 13 and the back side portion 11. Is arranged. Further, a three-dimensional gather 8 is formed on one side edge of the diaper along the longitudinal direction of the diaper, adjacent to the leg elastic member 5.
[0025]
The pair of connecting means 10 for connecting the abdominal side portion 13 and the back side portion 11 installed on the back side portion 11 side flap 4 may be arranged at least at the width direction end portion of the back side portion 11 side flap 4. Two or more pairs may be arranged. The coupling means 10 may be either an adhesive material or mechanical coupling, or a combination thereof. Further, the seat of the abdominal side portion 13 is appropriately selected and arranged in accordance with the coupling means 10 arranged on the back side portion 11.
[0026]
In the drawings, the elastic members 5 around the legs of the disposable diaper are arranged linearly along the crotch portion 12 of the disposable diaper, but may be curved or arranged in three dimensions, and are not particularly limited. Further, the number of leg elastic members 5 need not be three and may not be arranged. Moreover, you may arrange | position over the both side part full length of a disposable diaper. Further, when a plurality of leg-around elastic members 5 are formed, the interval between the elastic members 5 may be constant or may be changed. On the other hand, in the drawing, the leg-surrounding elastic member 5 is disposed on the left and right objects with respect to the longitudinal center line 15 of the disposable diaper along both sides of the disposable diaper. It may be arranged, or the number of arrangements, the shape of the arrangement, the expansion rate and thickness of the elastic body, etc. may be changed on the left and right.
[0027]
In the drawing, the three-dimensional gather 8 is disposed inwardly on one side of the leg-around elastic member 5, but it is not always necessary to inwardly tilt, and may be tilted outward or C-folded. In the drawing, the absorbent body 3 has an hourglass shape, and the outside of the absorbent body 3 is a standing line position. However, the standing line may be on the absorbent body and may be disposed outside the elastic member around the legs. Good and not limited. Two or more solid gathers 8 may be arranged on one side. In the drawing, one solid gather elastic member 9 of the three-dimensional gather 8 is arranged, but two may be arranged, and three or more arranged. Also good. When a plurality of three-dimensional gather elastic members 9 are arranged, the thicknesses and elongation rates of the respective elastic members may be the same or different. In the drawing, the three-dimensional gather 8 is disposed only on one side, but may be disposed on both sides, and is not particularly limited. The three-dimensional gather 8 may be the same shape on the left and right of the longitudinal center line of the disposable diaper, but may be different. When the three-dimensional gathers are different on the left and right of the longitudinal center line 15 of the disposable diaper, the number of arrangements may be changed, but the shape may be changed, and the number of arrangements, thicknesses, elongation ratios, etc. of the three-dimensional gather elastic members 9 May be changed.
[0028]
FIG. 2 is a cross-sectional view taken along the line XX ′ of the disposable diaper of FIG. In FIG. 2, an absorbent body 3 wrapped with a hydrophilic sheet 14 is disposed between a liquid-permeable top sheet 1 and a liquid-impermeable back sheet 2, and a side sheet 7 and a back surface are disposed on the side of the absorbent body 3. A pair of elastic members 5 around the legs are disposed between the sheets 2 and a three-dimensional gather 8 is formed inward by the side sheet 7 and one solid gather elastic member 9 toward the absorber 3 only on one side of the diaper. Has been. In the drawing, the inwardly turned three-dimensional gather 8 is arranged on one side, but a three-dimensional gather such as a folded-up three-dimensional gather or a part of the three-dimensional gather, such as C-folding or Z-folding, may be arranged. Further, the three-dimensional gather elastic member 9 need not be limited to one and may be two or more. In the drawing, the base end portion of the three-dimensional gather 8 is installed between the absorber 3 and the leg-surrounding elastic member 5, but it may be on the absorber 3 or the leg-surrounding elastic member 5, and is not particularly limited.
[0029]
The height of the three-dimensional gather 8 is 5 mm or more and 100 mm or less, and is appropriately selected depending on the type and size of the absorbent article. If it is less than 5 mm, when excrement stays on the absorber, it cannot be a sufficient breakwater. If it exceeds 100 mm, the upper surface of the absorbent body is covered with the crotch part, which may cause leakage, and the three-dimensional gather 8 extends to the outside of the elastic member 5 around the legs to become a flow path to the outside of the body fluid. It can be a cause.
[0030]
Further, the three-dimensional gathered elastic member 9 and the leg-around elastic member 5 have an elongation rate between 130% and 500%, preferably between 200% and 300% when the non-elongated state is 100%. The three-dimensional gather elastic member 9 may be a flat rubber or a stretchable film, but is preferably a thread rubber, and the thickness of the thread rubber is between 310 dtex and 3730 dtex, preferably between 470 dtex and 1240 dtex.
[0031]
In this embodiment, by arranging the three-dimensional gather 8 on the left side of the wearer, not only prevents the wearer sleeping sideways on the left side, but also the three-dimensional gather 8 on the right side of the wearer. By removing it, it can be manufactured at a low cost, and it is a disposable diaper excellent in economic efficiency.
[0032]
FIG. 3 shows an embodiment different from that shown in FIG. 2 and corresponds to a cross-sectional view taken along the line XX ′. In this embodiment, solid gathers are arranged on both sides of the diaper, but the shape and height of the right and left solid gathers and the number of solid gather elastic members 9 are different. That is, the three-dimensional gather 8 on one side is formed in a C-fold shape by folding the side sheet 4 and sandwiching the two three-dimensional gather elastic members 9. The other-side three-dimensional gather 8 is formed in an inverted shape by folding the side sheet 4 and sandwiching one three-dimensional gather elastic member 9. In addition, a pair of right and left solid gathers 8 having different shapes may be arranged as described above, but a plurality of sets of solid gathers 8 may be arranged so as to be asymmetrical with respect to the longitudinal center line 15.
Also, in the drawings, the shape and height of the right and left three-dimensional gathers and the number of three-dimensional gather elastic members 9 are different on the left and right, but only a part may be different or the same, and there is no particular limitation. .
In the drawing, the two three-dimensional gathered elastic members 9 are arranged only at the tip of the three-dimensional gather 8. However, not only the tip of the three-dimensional gathered elastic member 9, but one of them is in the vicinity of the C-fold folded part or the three-dimensional gather 8 standing line. It may be arranged. The two three-dimensional gather elastic members 9 may have the same thickness and elongation ratio, but may be different and are not particularly limited. Further, the thickness and elongation rate of the three-dimensional gather elastic member 9 may be the same between the left and right three-dimensional gathers 8, but they may be different.
[0033]
In the present embodiment, the three-dimensional gather elastic member 9 is arranged in a C-fold on the left side of the wearer's three-dimensional gather 8 to improve the standing, and the three-dimensional gather height is further increased. Further, it is possible to further prevent the side leakage of the wearer who sleeps in the lateral position with the left side facing down. In addition, by arranging a three-dimensional gather on the right side of the wearer, when changing diapers, the diaper can be removed without spilling the excrement accumulated on the upper part of the diaper, making it easy to use and preventing leakage in the lateral position. It is a disposable diaper with excellent functions.
[0034]
FIG. 4 is a partially cutaway plan view of a urine pad showing an embodiment different from FIG. In the drawing, an absorbent body 3 is disposed between a liquid-permeable top sheet 1 and a liquid-impermeable back sheet 2, and a leg-hole elastic member 5 is disposed between the back sheet 2 and the side sheet 7. The shape of the absorbent body 3, the shape of the entire urine pad, and the shape of the leg elastic member 5 are asymmetrical with respect to the longitudinal center line 15. When the entire urine pad is asymmetrical, the longitudinal center line 15 substantially coincides with the back center of the wearer.
[0035]
In the drawing, the shape of the absorbent body 3 is asymmetric with respect to the longitudinal center line 15, and the shape and size of the entire urine pad is also asymmetric with respect to the longitudinal center line 15. The shape of the absorber 3 may be bilaterally symmetric with respect to the longitudinal centerline 15 as shown in the embodiment of FIG. 1, but is asymmetrical with respect to the longitudinal centerline 15 as shown in this embodiment. There may be, and the shape of the absorber 3 is not specifically limited. Further, according to the shape of the absorbent body 3, the shape (outer shape) and size of the entire absorbent article may be bilaterally symmetrical with respect to the longitudinal center line 15, but as shown in the present embodiment, the longitudinal center line 15 Is not particularly limited. However, when the shape (outer shape) of the absorbent body 3 or the entire absorbent article is bilaterally symmetric, the shape of the absorbent article is set to a longitudinal center line 15 by providing a bilaterally asymmetric solid gather (not shown). To be asymmetrical to the left and right. As shown in the present example, the size of the absorbent article that is on the lower side of the wearer sleeping in the lateral position is increased by making the shape of the absorbent article asymmetrical with respect to the longitudinal center line 15. Thus, it is possible to prevent the side leakage by increasing the cover portion, or to manufacture the absorbent article at a low cost by removing unnecessary members of the absorbent article in the upper portion.
[0036]
In the drawing, the leg-hole elastic members 5 are disposed asymmetrically with respect to the longitudinal center line 15. In the drawing, one is arranged in a straight line with one leg elastic member 5 and the other is arranged in a curve with two leg elastic members 5, but the shape of the arrangement and the arrangement of the leg elastic members 5 are arranged. The number is not particularly limited. The leg elastic members 5 may be arranged only on one side, but preferably on both sides. By gathering on both sides of the absorbent article, the absorbent article becomes arm-shaped, so that the soiled absorbent article can be removed without spilling excrement accumulated on the upper part when replacing the absorbent article. I can do it.
By arranging the leg elastic member 5 asymmetrically with respect to the longitudinal center line 15, the leg around the absorbent article on the lower side of the wearer sleeping in the lateral position is tightly closed to prevent side leakage. Further, it is possible to manufacture the absorbent article at a low cost by suppressing the cost by arranging the elastic members 5 around the legs in the upper part to the minimum.
[0037]
Regarding the absorbent article in the present invention, any known absorbent article may be used, and any of a deployable disposable diaper, a pants-type disposable diaper, a urine pad, and the like may be used, and the absorbent article is not particularly limited.
The object of the present invention is to prevent wear even when excrement flows in the same direction for a wearer who is known to be used in a lateral position in only one direction. In order to provide an absorbent article that is excellent in use and that is suitably used, the shape of the absorbent article is asymmetrical with respect to the longitudinal center line, and the lower part of the lateral position is lower. It is to increase the leakage prevention effect. Therefore, change the shape and size of the elastic members around the legs, the three-dimensional gather, the absorbent article, the shape and size of the absorbent body on the lower side in the lateral position with respect to the back center of the wearer. Further, the present invention provides an absorbent article that is suitably used with a leakage prevention effect higher than that of the upper surface.
[0038]
【The invention's effect】
As described above, the absorbent article of the present invention has a shape in which the leakage prevention measure is mainly applied to only one direction with respect to the longitudinal center line of the absorbent article, so that the side article only in one direction. It is possible to provide an absorbent article that can be suitably used without causing leakage even when excrement flows only in the same direction to a wearer who is known to be used in a position.
In addition, by not taking too much leakage prevention measures on the side where excrement does not flow, it is possible to provide an absorbent article that can be manufactured at low cost without using extra materials and is excellent in economic efficiency.
[Brief description of the drawings]
FIG. 1 is a partially cutaway plan view showing a deployed state of a disposable diaper of the present invention.
2 is a cross-sectional view taken along the line XX ′ of the disposable diaper of FIG.
3 is a view corresponding to the XX ′ cross-sectional view of the disposable diaper of FIG. 1, showing an embodiment different from FIG. 2;
4 is a partially cutaway plan view showing a developed state of the urine pad of the present invention, showing an embodiment different from FIG. 1. FIG.
[Explanation of symbols]
1. 1. Liquid permeable top sheet 2. Back sheet Absorber 4. 4. Side flap 5. Leg elastic member 6. Elastic member around the waist Side seat 8. Solid gather9. Three-dimensional gather elastic member10. Coupling means 11. Back side 12. Inseam 13. Ventral side 14. Hydrophilic sheet 15. Longitudinal center line

Claims (3)

In an absorbent article comprising a liquid-permeable top sheet, a back sheet, and an absorbent body disposed between these two sheets,
A three-dimensional gather is arranged on the side of the absorber,
The absorbent article, wherein the shape of the three-dimensional gather is different on the left and right with respect to the longitudinal center line of the absorbent article. Wherein there is disposed a leg gather the absorbent side of the absorbent article, according to claim 1, the shape of the leg gathers, characterized in that the different lateral to the longitudinal centerline of the absorbent article Absorbent articles. The absorbent article according to claim 1 or 2 , wherein the absorbent article is a disposable diaper in which a waist opening and a pair of left and right leg openings are formed when worn.

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