JP2011072720A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily form a leakage preventing portion which tightly adheres onto a wearing person without falling sideways and prevents pressurization against the skin of the wearing person. <P>SOLUTION: The leakage preventing portion 342 of an absorbent article 1 includes: a cylindrical base part 3421 formed of an inextensible nonwoven fabric; and a second sheet 32 being an extensible nonwoven fabric, which is bonded with the inner surface of the cylindrical base part 3421. When the absorbent article 1 is in use, an area close to the top part 3422 of the leakage preventing portion 342 tightly adheres in a surface shape onto the skin of the wearing person, thereby to prevent the pressurization against the skin of the wearing person due to the leakage preventing portion 342 and the leakage of egesta. Besides, since the top part 3422 of the leakage preventing portion 342 is supported by the areas on the both right and left sides of the top part 3422, the leakage preventing portion 342 is prevented from falling sideways and also the leakage of the egesta is reliably prevented. The leakage preventing portion 342, which tightly adheres onto the wearing person without falling sideways and prevents the pressurization against the skin of the wearing person, is easily formed by using a lamination sheet including the second sheet 32 being the extensible nonwoven sheet concerning the absorbent article 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an absorbent article that receives excrement from a wearer.

  Conventionally, in absorbent articles such as light incontinence absorbent pads that are used inside disposable diapers, a pair of side walls are provided on both sides in the width direction, and elastic yarns provided on the side walls The side wall stands up toward the wearer due to the shrinkage and the like. When the absorbent article is worn, the pair of side wall portions becomes a three-dimensional gather that comes into contact with the vicinity of the base of the wearer's foot, thereby preventing excrement from leaking out from the absorbent article.

  For example, in the absorbent articles of Patent Document 1 and Patent Document 2, gathers having a hollow three-dimensional shape formed by sheet-like members are provided on both sides in the width direction. The cross section perpendicular to the longitudinal direction of each gather is substantially Ω-shaped, and in each gather, six elastic yarns extending in the longitudinal direction are arranged at approximately equal intervals over the entire circumference of the approximately Ω-shaped. In the absorbent article, the pair of gathers are made hollow so that the gathers are prevented from falling sideways and the wearer's skin is prevented from being pressed by the gathers.

JP 2009-6064 A JP 2009-6065 A

  By the way, in the absorbent article of patent document 1 and patent document 2, when manufacturing a gather, a sheet-like member is folded in half and many elastic yarns are hot-melt bonded between the folded sheet-like member. Since it is necessary to join with an agent, the production of gathers and absorbent articles is complicated.

  The present invention has been made in view of the above problems, and makes it easy for the leak-proof portion to be in close contact with the wearer without falling sideways, and it is easy for the leak-proof portion to press the wearer's skin. The purpose is to prevent.

  The invention according to claim 1 is an absorbent article that receives excrement from a wearer, and a substantially sheet-like main body portion in which an absorption core is disposed between a back sheet and a top sheet, and the main body portion A pair of leak-proof portions extending in the longitudinal direction of the main body portion on both sides of the main body portion, and each of the pair of leak-proof portions is formed of a stretch nonwoven fabric or a sheet containing the stretch nonwoven fabric in the longitudinal direction. It is a cylindrical part which extends, and the contractive force in the longitudinal direction is given to at least the top part of the cylindrical part by the stretchable nonwoven fabric.

  Invention of Claim 2 is an absorbent article of Claim 1, Comprising: The said cylindrical part has the cylindrical base part formed in the cylinder shape extended in the said longitudinal direction, The said elastic nonwoven fabric Are joined to the inner surface of the cylindrical base along at least the top of the cylindrical base.

  Invention of Claim 3 is an absorbent article of Claim 2, Comprising: The said cylindrical base part is formed with a non-stretchable nonwoven fabric.

  Invention of Claim 4 is an absorbent article of Claim 2 or 3, Comprising: In the said longitudinal direction, the said elastic nonwoven fabric is intermittently joined to the said cylindrical base.

  Invention of Claim 5 is an absorbent article in any one of Claim 2 thru | or 4, Comprising: The said elastic nonwoven fabric is joined to the said cylindrical base by heat-fusion joining or ultrasonic joining. .

  Invention of Claim 6 is an absorbent article in any one of Claim 2 thru | or 5, Comprising: In the said leak-proof part, the said elastic nonwoven fabric is joined only to the said top part among the said cylindrical base parts. The

  Invention of Claim 7 is the absorbent article in any one of Claim 2 thru | or 6, Comprising: The said leak-proof part laminated | stacked the said elastic nonwoven fabric on the sheet | seat which forms the said cylindrical base part It is formed by a sheet.

  According to the present invention, it is possible to easily prevent the leak-proof portion from coming into contact with the wearer without falling sideways, and it is possible to easily prevent the leak-proof portion from pressing the wearer's skin. In the inventions of claims 2 and 3, it is possible to easily obtain desired properties or functions such as the touch, moisture permeability, and water repellency of the leak-proof portion. Furthermore, in the invention of claim 4, a gather can be easily formed on the top of the leak-proof portion. In the invention of claim 7, the leak-proof portion can be formed more easily.

It is a top view of an absorptive article. It is sectional drawing of an absorbent article. It is sectional drawing of an absorbent article. It is sectional drawing which shows the other example of an absorbent article.

  FIG. 1 is a plan view showing an absorbent article 1 according to an embodiment of the present invention. The absorbent article 1 is a light incontinence absorbing pad (that is, an auxiliary pad) that is attached to the inner side (that is, the wearer's side) of an underwear that is an exterior article worn by the wearer and receives excrement such as urine from the wearer. Absorber). In FIG. 1, the absorbent article 1 is drawn with a surface in contact with the wearer (hereinafter referred to as “upper surface”) on the front side.

  2 shows the absorbent article 1 in the longitudinal direction of the absorbent article 1 at the position AA shown in FIG. 1 (that is, the vertical direction in FIG. FIG. 3 is a cross-sectional view taken along a plane perpendicular to the longitudinal direction.) FIG. 3 shows a portion of the absorbent article 1 in the vicinity of the upper end in FIG. It is sectional drawing cut | disconnected by the plane. In the absorbent article 1, the site | part of the lower edge part vicinity in FIG. 1 also has the structure similar to the cross section shown in FIG. In FIG. 2 and FIG. 3, for convenience of illustration, each configuration of the main body portion 2 and each configuration of the side seat 3 are drawn separately.

  As shown in FIGS. 1 to 3, the absorbent article 1 includes a substantially sheet-shaped main body 2 in which an absorbent core 22 is disposed between a back sheet 23 and a top sheet 21, and both side portions of the main body 2. A pair of side sheets 3 extending in the longitudinal direction of the main body 2 is provided on the upper side (that is, on both sides in the width direction perpendicular to the longitudinal direction). In the main body 2, the upper surface that is the main surface on the wearer side of the absorbent core 22 is covered with the top sheet 21, and the lower surface that is the main surface on the opposite side of the wearer side of the absorption core 22 is covered with the backsheet 23. . The top sheet 21 and the back sheet 23 are joined to each other around the absorbent core 22 by a hot melt adhesive or the like. In FIG. 1, the outline of the absorbent core 22 is drawn with a thick broken line in order to facilitate understanding of the drawing.

  The top sheet 21 is a liquid-permeable sheet material, for example, a non-woven fabric formed of hydrophilic fibers, and quickly captures moisture of excrement from the wearer and moves it to the absorbent core 22. Nonwoven fabrics used as the top sheet 21 are, for example, point bond nonwoven fabrics, air-through nonwoven fabrics, and spunlace nonwoven fabrics. As hydrophilic fibers forming these nonwoven fabrics, cellulose, rayon, cotton, or the like is usually used. In addition, as the top sheet 21, a liquid-permeable nonwoven fabric formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon) whose surfaces are hydrophilically treated with a surfactant may be used.

  The absorbent core 22 is formed by wrapping a mixture of a hydrophilic fiber such as pulverized pulp fiber or cellulose fiber with a granular water-absorbing polymer (for example, SAP (Super Absorbent Polymer)) with tissue paper or a liquid-permeable nonwoven fabric. The moisture that has permeated through the top sheet 21 is absorbed and quickly fixed. Tissue paper and liquid-permeable nonwoven fabric wrapping hydrophilic fibers are bonded to the hydrophilic fibers and the water-absorbing polymer with a hot-melt adhesive, and the shape of the hydrophilic fibers is lost and the water-absorbing polymer is dropped (especially, water absorption). Prevent later dropout). In the present embodiment, the absorbent core 22 includes pulp fibers and SAP.

  As the back sheet 23, a water-repellent or liquid-impervious nonwoven fabric (for example, a spunbond nonwoven fabric, a melt blown nonwoven fabric, SMS (spunbond) formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon).・ Mellow blow / spun bond) non-woven fabric), water-repellent or liquid-impervious plastic film, or a laminate in which these non-woven fabric and plastic film are laminated. And the like are prevented from oozing out of the main body 2. When a plastic film is used for the backsheet 23, a plastic film having moisture permeability (breathability) should be used from the viewpoint of preventing wear of the absorbent article 1 and improving the wearer's comfort. Is preferred.

  As shown in FIG. 1 to FIG. 3, each side sheet 3 is joined on the inner side in the width direction of the joining portion 33 and the strip-like joining portion 33 that extends in the longitudinal direction joined on the top sheet 21 of the main body portion 2. A side wall 34 extending from the portion 33 and extending over the entire length in the longitudinal direction of the main body 2 is provided.

  As shown in FIGS. 1 and 3, each of the pair of side wall portions 34 is overlapped on the joint portion 33 at both ends in the longitudinal direction, and fixed on the main body portion 2 by heat fusion bonding or ultrasonic bonding. Two side wall ends 341 are provided. Further, as shown in FIGS. 1 and 2, each of the pair of side wall portions 34 includes a leakage preventing portion 342 that continues from the two side wall end portions 341 in the center in the longitudinal direction and rises upward from the main body portion 2. . In FIG. 1, in order to facilitate the understanding of the drawing, parallel diagonal lines are given to the side wall end portions 341 of the pair of side wall portions 34.

  As shown in FIG. 2, each of the pair of leakage preventing portions 342 is a cylindrical portion extending in the longitudinal direction, and a cylindrical base portion 3421 formed in a cylindrical shape extending in the longitudinal direction by the first sheet 31, and the cylindrical base portion The belt-shaped second sheet 32 extending in the longitudinal direction is joined to the inner surface of the cylindrical base portion 3421 along the top portion 3422 (also the top portion of the leak-proof portion 342) of 3421. In the side sheet 3, a joining portion 33 that is continuous with the cylindrical base portion 3421 is also formed by the first sheet 31.

  As the first sheet 31, a water-repellent or liquid-impervious non-stretchable nonwoven fabric (for example, spunbond nonwoven fabric or the like) formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon) Melt blown nonwoven fabric, SMS nonwoven fabric) are used. The second sheet 32 is a stretchable nonwoven fabric, and a water-repellent spunbond nonwoven fabric, a melt blown nonwoven fabric, or a spunbond / melt blown composite nonwoven fabric formed of a thermoplastic elastomer resin (for example, polyolefin, polyamide, polyurethane) is used. . Here, a nonwoven fabric having a breaking elongation of 200% or more is defined as a stretchable nonwoven fabric, and a nonwoven fabric having a breaking elongation of less than 100% is defined as a non-stretchable nonwoven fabric. The breaking elongation of the second sheet 32 is preferably 250% or more and 400% or less, and the 50% elongation recovery rate is preferably 60% or more and 90% or less. As the second sheet 32, for example, Straflex made by Idemitsu Kosan Co., Ltd. is used.

  In the leak-proof part 342, the second sheet 32, which is a stretchable nonwoven fabric, is intermittently joined along the top part 3422 of the cylindrical base part 3421 in an expanded state, and the second sheet 32 contracts in the longitudinal direction. As a result, a contraction force in the longitudinal direction is applied to the top portion 3422 of the leak-proof portion 342. As a result, the leak-proof portion 342 stands on the main body portion 2 and a gather is formed at the top 3422 of the leak-proof portion 342. In the present embodiment, the second sheet 32 is joined only to the top 3422 of the cylindrical base 3421. The lengths of the plurality of joint portions of the second sheet 32 that are intermittently arranged in the longitudinal direction are 1.0 mm to 5.0 mm, respectively, and the longitudinal distance between the adjacent joint portions (that is, adjacent joints). The length of the non-bonded part between the parts) is 2 mm to 15 mm. Further, the second sheet 32 is joined to the cylindrical base 3421 by heat fusion joining or ultrasonic joining, and an adhesive such as a hot melt adhesive is not used for joining the second sheet 32.

  As shown in FIG. 3, in the side wall end 341, a space continuous from the internal space of the leak-proof portion 342 (see FIG. 2) that is a cylindrical portion is crushed in the vertical direction, and the upper portion of the leak-proof portion 342 (that is, , A portion continuous from the top portion 3422 and the vicinity thereof) is joined onto the main body portion 2 via a portion continuous from the lower part of the leak-proof portion 342. The second sheet 32 is held in a state of being sandwiched between the first sheets 31 in a non-stretched state.

  As described above, in the absorbent article 1, the leak-proof portion 342 is configured as a flexible cylindrical portion by applying a contracting force to the top portions 3422 of the pair of cylindrical leak-proof portions 342. Stand up on 2. Then, when the absorbent article 1 is worn by the wearer, the leak-proof portion 342 is deformed and the portion near the top portion 3422 is in close contact with the wearer's skin. For this reason, it can prevent that a wearer's skin is strongly pressed by the leak-proof part 342 compared with the case where a leak-proof part touches a wearer's skin linearly, and excrement from a wearer. Can be prevented from leaking out of the absorbent article 1 from between the leak-proof portion 342 and the skin of the wearer.

  In addition, the absorbent article 1 is deformed along the wearer's body due to the shrinkage of the leak-proof portion 342, whereby the rigidity of the left and right sides supporting the top portion 3422 is improved in the leak-proof portion 342. Large movement in the width direction of the top portion 3422 is prevented. Thereby, it is prevented that the leak-proof part 342 falls to the side (namely, width direction), and the leakage of the excrement from the absorbent article 1 is prevented more reliably. By using a sheet including the second sheet 32 that is a stretchable nonwoven fabric (that is, a laminated sheet of the first sheet 31 and the second sheet 32), the leakage preventing part 342 does not fall sideways. In addition, it is possible to easily adhere to the wearer and to easily prevent the leakage preventing portion 342 from pressing the wearer's skin.

  As described above, in the leak-proof portion 342, the second sheet 32 that is a stretchable nonwoven fabric is joined to the inner surface of the cylindrical base portion 3421 along the top portion 3422 of the cylindrical base portion 3421 formed by the first sheet 31. . Therefore, the first sheet 31 that is the material of the cylindrical base 3421 is not required to be stretchable, and the first sheet 31 can be selected from a variety of materials. As a result, the properties or functions of the leak-proof portion 342 such as touch, moisture permeability, and water repellency can be easily obtained.

  In addition, by forming the cylindrical base 3421 from a non-stretchable nonwoven fabric that has been used in various types of absorbent articles such as auxiliary absorbents and disposable diapers, leakage prevention having a desired function has been achieved. The material of the part 342 can be easily determined, and the leak-proof part 342 and the absorbent article 1 can be easily formed while reducing the manufacturing cost. Furthermore, by joining the second sheet 32 only to the top 3422 of the cylindrical base 3421, the amount of the second sheet 32, which is a stretchable nonwoven fabric, can be reduced while making the shape of the leak-proof part 342 desired. The manufacturing cost of the leak-proof part 342 and the absorbent article 1 can be further reduced.

  In the leak-proof part 342, the second sheet 32 is intermittently joined along the top part 3422 of the cylindrical base part 3421, whereby a gather can be easily formed in the top part 3422 of the leak-proof part 342. As a result, it is possible to more surely prevent the leak-proof portion 342 from softly adhering to the wearer's skin and strongly pressing the wearer's skin. Moreover, since the rigidity with respect to torsion of the leak-proof portion 342 is improved, the leak-proof portion 342 is more reliably prevented from falling sideways, and the excrement from the absorbent article 1 is further reliably prevented from leaking. Can do.

  When the leakage preventing part 342 is formed, the second sheet 32 is joined to the cylindrical base part 3421 by heat fusion joining or ultrasonic joining without using an adhesive such as a hot melt adhesive. Thereby, irritation | stimulation by an adhesive agent arises in the site | part which the leak-proof part 342 touched in the wearer's skin, and the wear feeling of the absorbent article 1 can be improved. Moreover, in manufacture of the absorbent article 1, the lamination sheet by which the 2nd sheet | seat 32 which is a stretchable nonwoven fabric was laminated | stacked and joined to the 1st sheet | seat 31 which forms the cylindrical base 3421 was prepared beforehand, and the said lamination sheet | seat By curving the tube to form a cylindrical shape, the leak-proof portion 342 can be easily formed.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  For example, as long as excrement leakage from the absorbent article 1 can be prevented, the second sheet 32 may be joined to the cylindrical base 3421 continuously in the longitudinal direction. Moreover, when the irritation | stimulation with respect to a wearer's skin can fully reduce, joining to the cylindrical base part 3421 of the 2nd sheet | seat 32 does not necessarily need to be limited to heat fusion joining or ultrasonic joining, for example, The second sheet 32 may be bonded to the cylindrical base 3421 with an adhesive such as a hot melt adhesive.

  When the leak-proof portion 342 can be easily formed into a desired shape, the second sheet 32 does not necessarily have to be joined only to the top portion 3422 of the cylindrical base portion 3421. The second sheet 32 only needs to be joined along at least the top portion 3422 of the cylindrical base portion 3421. For example, as shown in FIG. 4, on the inner surface of the cylindrical base portion 3421, the lower portion on the inner side from the top portion 3422 in the width direction. The belt-like second sheet 32 having a relatively large width may be joined within a range reaching the top. The second sheet 32 may be bonded to the entire inner surface of the cylindrical base 3421 or the entire inner surface of the first sheet 31 including the entire inner surface of the cylindrical base 3421. Note that the second sheet 32 may be bonded to the outer surface of the cylindrical base 3421.

  In the above embodiment, the portions on both sides in the width direction of the cylindrical base portion 3421 (that is, the joint portion 33) in the first sheet 31 are overlapped on the outer side in the width direction at the lower end of the cylindrical base portion 3421. However, the portions on both sides in the width direction of the cylindrical base portion 3421 are bonded to the main body portion 2 on the inner side and the outer side of the lower end of the cylindrical base portion 3421, so that the longitudinal direction of the first sheet 31 is increased. The vertical cross-sectional shape may be approximately Ω.

  The first sheet 31 that forms the cylindrical base 3421 of the leak-proof portion 342 is not necessarily limited to a water-repellent or liquid-impervious and non-stretchable nonwoven fabric. The cylindrical base 3421 may be formed of a liquid plastic film or a laminated sheet of the plastic film and a water-repellent or liquid-impervious nonwoven fabric. In addition, the leak-proof portion 342 is not necessarily provided between the non-stretchable first sheet 31 and the second sheet 32 that is a stretchable nonwoven fabric as long as at least the top portion 3422 is contracted in the longitudinal direction by the stretchable nonwoven fabric. There is no need to form the laminated sheet. For example, the entire leak-proof portion 342 may be made of a stretchable nonwoven fabric.

  In addition to the light incontinence pad, the structure of the above-mentioned absorbent article is a pants-type disposable diaper having a trunk opening at the top and a pair of leg openings at the bottom, a part that contacts the abdomen side of the wearer, and a back An open-type disposable diaper that is worn around the waist and a part that is in contact with the side, various auxiliary absorbents that are attached to these disposable diapers, etc., or sanitary napkins and panty liners It may be applied to various absorbent articles such as.

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Main-body part 21 Top sheet 22 Absorption core 23 Back sheet 31 1st sheet 32 2nd sheet 342 Leak-proof part 3421 Cylindrical base 3422 Top part

Claims (7)

An absorbent article that receives excrement from a wearer,
A substantially sheet-like main body in which an absorbent core is disposed between the back sheet and the top sheet;
A pair of leak-proof portions extending in the longitudinal direction of the main body portion on both sides of the main body portion;
With
Each of the pair of leak-proof portions is a tubular portion extending in the longitudinal direction formed by a stretch nonwoven fabric or a sheet containing a stretch nonwoven fabric,
The absorbent article, wherein the contractive force in the longitudinal direction is applied to at least a top portion of the cylindrical portion by the stretchable nonwoven fabric. The absorbent article according to claim 1,
The cylindrical portion has a cylindrical base formed in a cylindrical shape extending in the longitudinal direction,
The absorbent article, wherein the stretchable nonwoven fabric is bonded to the inner surface of the cylindrical base along at least the top of the cylindrical base. The absorbent article according to claim 2,
The said cylindrical base part is formed with a non-stretchable nonwoven fabric, The absorbent article characterized by the above-mentioned. The absorbent article according to claim 2 or 3,
The absorbent article, wherein the stretchable nonwoven fabric is intermittently joined to the cylindrical base in the longitudinal direction. The absorbent article according to any one of claims 2 to 4,
An absorbent article, wherein the stretchable nonwoven fabric is bonded to the cylindrical base by heat fusion bonding or ultrasonic bonding. An absorbent article according to any one of claims 2 to 5,
The absorbent article, wherein the stretchable nonwoven fabric is bonded only to the top of the cylindrical base. The absorbent article according to any one of claims 2 to 6,
The absorbent article, wherein the leakage preventing part is formed of a laminated sheet obtained by laminating the stretchable nonwoven fabric on the sheet forming the cylindrical base.

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