JP2011244894A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article capable of easily preventing lateral leakage even though large quantity of body fluid such as urine is discharged at one time.SOLUTION: In the absorbent article 1 constituted by arranging an absorbent core 4 between a top sheet 2 and a back sheet 3 and having a longitudinal direction y and a width direction z, auxiliary absorbent bodies 11 in which compressed elastic bodies 12 is covered with cover sheets 13 are arranged at the end parts of the absorbent core 4 or outside of the same in the top sheet 2 side of the absorbent article 1, at least a part of each of the cover sheets 13 are released when getting wet.

Description

  The present invention relates to absorbent articles such as disposable diapers, urine pads, and sanitary napkins.

  Conventionally, in order to enhance the leakage prevention effect of the absorbent article, an absorbent article to which an auxiliary article is attached is known. For example, Patent Document 1 discloses a pad body having an elastic hollow body formed of an elastic material and having a hollow inside, and a skin contact sheet covering the elastic hollow body, and fixing means for fixing the pad body to an absorbent article. An auxiliary pad is disclosed and used as attached to a top sheet of an absorbent article.

Japanese Patent No. 3847023

  However, the auxiliary pad disclosed in Patent Document 1 is intended to prevent the side leakage of urine and the like by using the flexibility and elasticity of the auxiliary pad to enhance the fit of the absorbent article to the wearer. The auxiliary pad itself does not have a liquid absorption capability. Therefore, even if such an auxiliary pad is attached to the absorbent article, if a large amount of body fluid such as urine is discharged at a time, the body fluid may overflow from the absorbent article and leak.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an absorbent article that can easily prevent side leakage even when a large amount of body fluid such as urine is discharged at a time.

  The absorbent article of the present invention that has solved the above problems is an absorbent article having a longitudinal direction and a width direction in which an absorbent core is disposed between a top sheet and a back sheet, and the absorbent article On the top sheet side of the article, an auxiliary absorbent body in which a compressed elastic body is included in the covering sheet is provided at the end of the absorbent core or outside thereof, and at least a part of the covering sheet is opened when the covering sheet is wet. It is characterized in that it is. In the absorbent article of the present invention, when body fluid such as urine diffuses in the longitudinal direction or width direction of the absorbent article and reaches the auxiliary absorbent body, at least a part of the covering sheet is released due to the auxiliary absorbent body getting wet, The compressed elastic body is released out of the covering sheet. As a result, the body fluid is quickly absorbed by the elastic body in the process of being released from the compression external force and recovering to the non-compressed state, thereby preventing side leakage of body fluid such as urine.

  The auxiliary absorbent body is preferably provided so as to extend substantially in the longitudinal direction on both sides in the width direction of the absorbent core. By providing the auxiliary absorbent in this manner, when a large amount of body fluid such as urine is discharged at a time, side leakage in the width direction of the absorbent article can be effectively prevented.

  The covering sheet is preferably at least one selected from the group consisting of tissue paper, thin paper, polyvinyl alcohol film, wafer film, and gelatin film. In addition, the covering sheet is bonded to a water-soluble adhesive, is formed into a bag shape, and an elastic body compressed therein is included, and the water-soluble adhesive is made of starch paste, styrene-isoprene-styrene block copolymer ( SIS) and at least one selected from the group consisting of styrene-ethylene-butadiene-styrene block copolymer (SEBS) is preferable. If the covering sheet is configured in this manner, a part of the covering sheet is easily opened when the covering sheet is wet.

  The elastic body is preferably a foamed polymer or a fiber mass. If the elastic body is a foamed polymer or a fiber lump, it is easy to compress and easily absorbs body fluids such as urine in the process of being released from the compression external force and recovering to the uncompressed state.

  In the absorbent article, it is preferable that rising flaps are provided on both sides of the absorbent core in the width direction, and the auxiliary absorbent body is provided adjacent to the inside of the rising flaps. Since body fluid such as urine tends to accumulate immediately inside the rising flap, if an auxiliary absorber is provided adjacent to the inside of the rising flap, side leakage of urine or the like from the rising flap can be effectively prevented.

  The absorbent article is not provided with rising flaps on both sides in the width direction of the absorbent core, and the auxiliary absorbent body is provided in an area within 20 mm inward from the both side edges in the width direction of the absorbent core or in an area within 30 mm outward. It is also preferred that In this case, although the rising flap is not provided, the auxiliary absorbent body can prevent side leakage in the width direction of the absorbent article. In addition, since the auxiliary absorbent body is made of an elastic body, even when the auxiliary absorbent body touches the wearer's skin, there is less pressure and the wearing feeling of the absorbent article is improved.

  The absorbent article of the present invention can easily prevent side leakage even when a large amount of body fluid such as urine is discharged at a time.

The top view which looked at the absorbent article (urine pad) from the top sheet side as one embodiment of the absorbent article of this invention is represented. The AA sectional view of the absorptive article of Drawing 1 is expressed. As other embodiment of the absorbent article of this invention, the top view which looked at the absorbent article (urine pad) from the top sheet side is represented. The BB sectional drawing of the absorptive article of Drawing 3 is expressed.

  In the absorbent article of the present invention, the absorbent core is disposed between the top sheet and the back sheet, and has a longitudinal direction and a width direction. Examples of the absorbent article of the present invention include disposable diapers, urine pads (including incontinence pads), sanitary napkins, and the like.

  The shape of the absorbent article is not particularly limited as long as it has a longitudinal direction and a width direction. When the absorbent article is, for example, a urine pad or a sanitary napkin, the shape of the absorbent article includes a substantially rectangular shape, an hourglass shape, a gourd shape, a battledore shape, and the like.

  When the absorbent article is a disposable diaper, the disposable diaper is an open-type disposable diaper in which a pair of fastening members are provided on the left and right sides of the back or front abdomen and formed into a pants shape when worn by the fastening member The pants-type disposable diaper in which the waist opening and the pair of leg openings are formed by joining the front abdomen and the back part may be used.

  When the absorbent article is, for example, a disposable diaper, the disposable diaper is preferably composed of a front abdomen, a back part, and a crotch part provided between them and provided with the absorbent core. When the absorbent article is a disposable diaper, as the absorbent article, for example, a laminated body composed of an inner sheet and an outer sheet forms a diaper body composed of a front abdomen, a back part, and a crotch part located between them. The absorbent article which has an absorptive core in the crotch part of a diaper main body may be provided. At this time, a substantially rectangular shape or the like is shown as the shape of the absorbent article. Further, when the absorbent article is a disposable diaper, as the absorbent article, for example, the absorbent article forms a front abdomen, a back part, and a crotch portion located between them, and absorbs the crotch. A core may be provided.

  When wearing a disposable diaper, the front abdomen, the back part, and the crotch part are referred to as the front part of the abdomen and the part applied to the butt side of the wearer as the back part. A portion located between the back portion and the wearer's crotch is referred to as a crotch portion.

  The longitudinal direction of the absorbent article means a direction extending in the front-rear direction of the wearer's crotch when the wearer wears the absorbent article. The width direction of the absorbent article means a direction that is on the same plane as the absorbent article in a state where the absorbent article is spread on a plane and is orthogonal to the longitudinal direction. When the shape of the absorbent article is substantially rectangular, the longitudinal direction of the absorbent article is generally the long-axis direction of the substantially rectangular shape (the direction in which the long side extends). When the shape of the absorbent core is an hourglass type, a gourd type, or a battledore type, the longitudinal direction of the absorbent core is generally the direction of the symmetry axis of each shape. When an absorbent article has a front part, a back part, and a crotch part, the direction (or the reverse direction) from a front part to a back part turns into a longitudinal direction.

  The top sheet is a sheet located on the wearer side when the absorbent article is worn, and is preferably liquid permeable. The back sheet is a sheet located on the side opposite to the wearer when the absorbent article is worn, that is, on the outside, and is preferably liquid-impermeable. When the absorbent article is a urine pad and is used by being attached to the inside of a separate disposable diaper or the like, the back sheet may be liquid permeable. In the present invention, liquid impermeability includes the meaning of water repellency.

  Examples of the top sheet include a nonwoven fabric formed from hydrophilic fibers such as cellulose, rayon, and cotton; and a nonwoven fabric formed from hydrophobic fibers such as polypropylene, polyethylene, polyester, polyamide, and nylon. The surface of which is hydrophilized with a surfactant can be used. As the top sheet, a woven fabric, a knitted fabric, or a plastic film in which holes are formed may be used.

  As the back sheet, a nonwoven fabric formed from hydrophobic fibers such as polypropylene, polyethylene, polyester, polyamide, nylon, a plastic film, or the like can be used. Moreover, you may use the laminated body of a nonwoven fabric and a plastic film.

  As described above, when the absorbent article is provided in the crotch portion of the diaper main body formed of the laminate including the inner sheet and the outer sheet, the inner sheet is hydrophilic or liquid impermeable. Preferably, the outer sheet is liquid impermeable.

  The absorbent core is not particularly limited as long as it can absorb excrement such as urine. As the absorbent core, for example, a molded body in which the absorbent material is molded into a predetermined shape is used, or the absorbent material is covered with a sheet member such as a paper sheet (for example, tissue paper) or a liquid-permeable nonwoven sheet. Can be used. Examples of the absorbent material contained in the absorbent core include hydrophilic fibers such as pulverized pulp fiber and cellulose fiber, and water-absorbent resins such as polyacrylic acid-based, polyaspartic acid-based, cellulose-based, starch and acrylonitrile-based resins. Etc. The absorbent material preferably contains at least a water absorbent resin. Moreover, you may use what mixed or disperse | distributed the water absorbing resin to the aggregate | assembly of a hydrophilic fiber as an absorptive material.

  The shape of the absorbent core is not particularly limited. Examples of the shape of the absorbent core include a substantially rectangular shape, an hourglass shape, a gourd shape, and a battledore shape.

  The absorbent article may be provided with rising flaps on both sides in the width direction of the absorbent core. The rising flaps may be provided, for example, along both side edges of the absorbent core above the absorbent core, or may be provided on both outer sides in the width direction of the absorbent core. By providing the rising flap, side leakage of excrement such as urine can be prevented. The rising flaps may be formed by raising the inner ends of the side sheets provided on both sides of the top sheet in the width direction. An elastic member is preferably provided at the inner end of the rising flap, and the rising flap rises toward the wearer's skin due to the contraction force of the elastic member, so that a leak-proof wall is easily formed. The rising flap and the side sheet are preferably liquid-impermeable.

  In the absorbent article of the present invention, an auxiliary absorbent body is provided on the top sheet side of the absorbent article. As long as the auxiliary absorbent is provided on the top sheet side of the absorbent article, the member to be attached is not particularly limited. For example, the auxiliary absorbent body may be attached to the top sheet, or may be attached to another member (for example, a rising flap or a side sheet) located on the top sheet side of the absorbent article. The auxiliary absorbent body may be provided on the absorbent article so as to face the wearer's skin when the wearer wears the absorbent article. That is, the auxiliary absorber is provided on the skin surface side of the absorbent article.

  The auxiliary absorbent body has a covering sheet and a compressed elastic body included in the covering sheet. That is, the auxiliary absorbent body is configured such that a compressed elastic body is included in the covering sheet. When the auxiliary absorbent body is wet, at least a part of the covering sheet is released, and as a result, the compressed elastic body is released out of the covering sheet. Since the elastic body is included in the cover sheet in a compressed state, the non-compressed elastic body includes a compressible portion (typically air). The inside of the compressible portion is released from the external compression force and recovered to the non-compressed state, so that the inside becomes negative pressure and can absorb body fluid such as urine. Alternatively, body fluid such as urine can be absorbed by capillary action. That is, the auxiliary absorbent body is capable of absorbing body fluids such as urine in the process in which at least a part of the covering sheet is released by being wet and released from the compression external force of the elastic body to recover to an uncompressed state. Become.

  The elastic body is included in a compressed state in the covering sheet. Accordingly, it is preferable that the elastic body increases in volume from the compressed state when at least a part of the covering sheet is opened by being wet.

  The elastic body used for the auxiliary absorbent body is not particularly limited as long as it is a compressible material. Moreover, it is preferable that an elastic body is a member which can be elastically deformed on the handling conditions of a general absorbent article. For example, the member is preferably a member that can follow the twisting and bending of the absorbent article. Examples of the elastic body include foamed polymers such as foamed urethane, foamed rubber, and foamed polyester; and fiber aggregates that are aggregates of fibers such as cotton, sponge, pulp fiber, and synthetic fiber. The fiber mass may contain a water absorbent resin. If the elastic body is a foamed polymer or a fiber lump, it is easy to compress, and when released from a compression external force, body fluid such as urine is easily absorbed quickly.

  As the fiber used for the fiber mass, natural cellulose fibers such as pulp, cotton and hemp; and regenerated cellulose fibers such as rayon and viscose are preferable. If such a cellulose fiber is used to form a fiber lump and apply it to an elastic body, body fluid can be readily absorbed by the elastic body.

When a fiber lump is used as the elastic body, the density (apparent density) of the elastic body compressed in the auxiliary absorbent body is preferably 0.01 g / cm ³ or more, more preferably 0.02 g / cm ³ or more, 0.05 g / cm ³ or less are preferred, 0.04 g / cm ³ or less is more preferable. If the density of the compressed elastic body is 0.01 g / cm ³ or more, when the cover sheet is released, the elastic body is easily released so as to swell out of the cover sheet. As a result, it becomes easy to absorb body fluids such as urine over a wide range. If the density of the compressed elastic body is 0.05 g / cm ³ or less, even if the elastic body is included in the cover sheet in a compressed state, the cover sheet is not easily broken in a dry state.

  The covering sheet used for the auxiliary absorber is preferably water-decomposable. If the covering sheet is water-degradable, when the covering sheet is wet with body fluid such as urine, the covering sheet is easily broken and released, and as a result, the compressed elastic body is easily released out of the covering sheet. The water-decomposable covering sheet is preferably at least one selected from the group consisting of tissue paper, thin paper, polyvinyl alcohol film, wafer film, and gelatin film. If a covering sheet is comprised with such a material, it will become easy to tear when a covering sheet gets wet.

  The compressed elastic body should just be included by the 1 or 2 or more coating sheet. For example, one cover sheet may be folded in two, and the periphery of the cover sheet folded in two may be joined to form a bag, and a compressed elastic body may be included therein. Further, the peripheral edges of the two covering sheets may be joined together to form a bag, and a compressed elastic body may be included therein. The covering sheets may be joined to each other by, for example, an adhesive (hot melt adhesive or the like) or heat fusion (heat sealing or the like).

  The covering sheet used for the auxiliary absorbent body may not be water-degradable. In this case, the covering sheet may be joined by a water-soluble adhesive to form a bag, and the compressed elastic body may be included therein. If the coated sheet is joined with a water-soluble adhesive, when the part of the coated sheet joined with the water-soluble adhesive gets wet with body fluid such as urine, the joining with the water-soluble adhesive is released and the coated sheet is released. The Even if the covering sheet is water-degradable, the covering sheet may be joined with a water-soluble adhesive.

  The water-soluble adhesive is not particularly limited as long as the adhesion effect is reduced when wetted with water, but starch adhesive, styrene-isoprene-styrene block copolymer (SIS), and styrene-ethylene-butadiene-styrene block copolymer are not limited. It is preferable that it contains at least one selected from the group consisting of polymers (SEBS). The water-soluble adhesive containing SIS and SEBS may be a hot melt adhesive. If the water-soluble adhesive contains such a component as an adhesive component, the joint of the joint is easily released when the joint with the water-soluble adhesive gets wet with water.

  When joining a non-water-decomposable coating sheet with a water-soluble adhesive, the non-water-decomposable coating sheet is preferably liquid permeable. What is necessary is just to employ | adopt the nonwoven fabric etc. which are used for a top sheet as such a covering sheet.

  More preferably, the auxiliary absorbent body uses a water-degradable covering sheet. If a water-decomposable covering sheet is used, the covering sheet is easily opened regardless of which part of the covering sheet gets wet, and leakage prevention from the absorbent article by the auxiliary absorbent is more reliably realized.

  The auxiliary absorbent body is provided on the top sheet side of the absorbent article and on the end of the absorbent core or on the outside thereof. By providing the auxiliary absorbent body at such a position, the auxiliary absorbent body can prevent leakage from the absorbent article. In the absorbent article of the present invention, when the body fluid such as urine diffuses in the longitudinal direction or the width direction of the absorbent article and reaches the auxiliary absorbent body, the auxiliary absorbent body gets wet, and at least a part of the covering sheet is opened, The compressed elastic body is released out of the covering sheet. As a result, the body fluid is quickly absorbed by the elastic body released from the compression external force, and the side leakage of body fluid such as urine is prevented.

  The absorbent article of the present invention is particularly effectively prevented from leaking when bodily fluids such as urine are discharged in large quantities. That is, when a small amount or a normal amount of body fluid is discharged, the body fluid is absorbed by the absorbent core, but when a large amount of body fluid is discharged at once and the body fluid is about to leak from the absorbent article, It is preferable that the auxiliary absorbent body can prevent leakage from the absorbent article.

  The auxiliary absorbent body is provided at an end of the absorbent core or outward from the absorbent core, and specifically, a region within 20 mm inward from the edge of the absorbent core, or a longitudinal direction from the edge of the absorbent core or It is provided in the outer region in the width direction. By providing the auxiliary absorbent body in such a region, body fluid such as urine is prevented from leaking from the longitudinal direction or the width direction of the absorbent article. For example, if the auxiliary absorber is provided at the widthwise end of the absorbent core, leakage from the width direction is prevented, and if the auxiliary absorber is provided at the longitudinal end of the absorbent core, leakage from the longitudinal direction is prevented. Is done.

  The auxiliary absorbent body is attached to a member (for example, a top sheet, a rising flap, a side sheet) located on the top sheet side of the absorbent article. The fixing means for attaching the auxiliary absorbent body to the member located on the top sheet side of the absorbent article is not particularly limited, and for example, an adhesive such as a hot melt adhesive may be used. In addition, it is preferable that the fixing means of an auxiliary absorber is water-insoluble.

  The shape of the auxiliary absorber is not particularly limited, but is preferably a long and thin shape such as a column shape. The column shape does not need to have the same cross section (shape and size) from one end to the other end, and for example, the cross-sectional area may become smaller as one end or the other end is approached. The cross-sectional shape of the columnar shape is not particularly limited, and examples thereof include a circle, an ellipse, a quadrangle, and a quadrangle with rounded corners. Especially, the cross-sectional shape of the columnar shape is preferably a circle, an ellipse, or a square with rounded corners. In this case, even if the auxiliary absorber touches the wearer, the feeling of pressure is reduced. The column-shaped cross section means a cross section orthogonal to the longitudinal direction of the column shape.

  It is preferable that the auxiliary absorbent body is partially attached to a location where it is desired to enhance the leakage prevention effect of the absorbent article. For example, when the absorbent article is worn, a liquid pool is likely to be generated in a portion where a gap is formed between the absorbent article and the wearer's skin, and it is preferable to provide an auxiliary absorber in such a portion. . Specifically, for example, it is preferable to provide auxiliary absorbers on both sides in the width direction of the portion facing the urination portion of the absorbent article and on both sides in the width direction of the portion that becomes the bottom when the absorbent article is worn. Therefore, it is preferable that the auxiliary absorbent body is provided so as to extend substantially in the longitudinal direction on both sides in the width direction of the absorbent core. More preferably, the auxiliary absorbent body extends in a substantially longitudinal direction in a region within 20 mm inward from an edge of the narrowest portion in the width direction of the absorbent core, or in a region outward in the width direction. Provided. By providing the auxiliary absorbent in this way, side leakage of body fluid such as urine from the absorbent article can be effectively prevented.

  In the case where the auxiliary absorbent body is provided extending substantially in the longitudinal direction on both sides in the width direction of the absorbent core, the width of the auxiliary absorbent body is preferably 5 mm or more, more preferably 10 mm or more, and preferably 40 mm or less, preferably 35 mm or less. More preferred. If the width of the auxiliary absorbent is 5 mm or more, the production of the auxiliary absorbent is facilitated and the side leakage preventing effect by the auxiliary absorbent is more reliable. If the width | variety of an auxiliary absorber is 40 mm or less, an auxiliary absorber will not cover an absorptive core too much and it will become easy to exhibit the absorption capability of an absorptive core. Further, the auxiliary absorber does not function when a small amount or a normal amount of body fluid is discharged, and the auxiliary absorber easily functions when a large amount of body fluid is discharged at once.

  In the case where the auxiliary absorbent body is provided on both sides in the width direction of the absorbent core so as to extend substantially in the longitudinal direction, the length of the auxiliary absorbent body is not particularly limited. The length of the auxiliary absorbent may be adjusted as appropriate according to the region where it is desired to enhance the leakage prevention effect of the absorbent article. It is preferable that the length of the auxiliary absorbent body in the longitudinal direction has a length at least equal to the width. The length of the auxiliary absorber is preferably, for example, from 50 mm to 300 mm (more preferably from 70 mm to 200 mm).

  A preferable embodiment is described about the absorbent article of this invention provided with an auxiliary absorber.

  In the absorbent article of the present invention, it is preferable that rising flaps are provided on both sides of the absorbent core in the width direction, and the auxiliary absorbent body is provided adjacent to the inside of the rising flaps. Since body fluid such as urine tends to accumulate immediately inside the rising flap, if an auxiliary absorber is provided adjacent to the inside of the rising flap, side leakage such as urine from the rising flap can be effectively prevented. . In this case, the auxiliary absorber may be attached to the rising flap, or may be attached to the top sheet adjacent to the inside of the rising flap. The inner side of the rising flap means the inner side with respect to the width direction when the rising flap is raised.

  In the absorbent article of the present invention, the rising flaps are not provided on both sides of the absorbent core in the width direction, and the auxiliary absorbent body is within 20 mm inward from the both side edges in the width direction of the absorbent core or within 30 mm outside. It is also preferable to be provided in the region. In this case, although the rising flap is not provided, the auxiliary absorbent body can prevent side leakage in the width direction of the absorbent article. In addition, since the auxiliary absorbent body is made of an elastic body, even when the auxiliary absorbent body touches the wearer's skin, there is less pressure and the wearing feeling of the absorbent article is improved.

  An example of the embodiment of the absorbent article of the present invention will be described with reference to the drawings. 1 and 2 show an embodiment of the absorbent article of the present invention. FIG. 1: shows the top view which looked at the urine pad as an absorbent article from the top sheet side. FIG. 2 is a cross-sectional view taken along the line AA of the absorbent article in FIG. In the drawings of the present application, the arrow x is defined as the width direction, and the arrow y is defined as the longitudinal direction. The vertical direction is defined as the vertical direction z with respect to the surface formed by the arrows x and y. Although the case where the shape of the absorbent article 1A is a battledore type is shown in FIG. 1, the shape of the absorbent article 1A is not limited to this.

  In the absorbent article 1A, the absorbent core 4 is disposed between the top sheet 2 and the back sheet 3, and has a longitudinal direction y and a width direction x. The top sheet 2 is disposed so as to face the wearer's skin, and allows excretion such as urine to pass through. The excrement passing through the top sheet 2 is accommodated by the absorbent core 4. The back sheet 3 prevents excrement from leaking outside.

  A pair of side sheets 5 extending in the longitudinal direction y are provided on both sides in the width direction x of the top sheet 2, and an elastic member 7 for standing is provided on the inner end of the side sheet 5 (FIG. 2). . As for the side seat | sheet 5, the inner edge of the side seat | sheet 5 stands | starts up toward a wearer's skin by the contraction force of the elastic member 7 for standing up, and, thereby, the standing | starting flap 6 is formed. That is, the absorbent article 1 </ b> A is provided with the rising flaps 6 on both sides in the width direction x of the absorbent core 4. The rising flap 6 prevents lateral leakage of urine or the like in the width direction x.

  On the top sheet 2 side of the absorbent article 1 </ b> A, an auxiliary absorbent body 11 in which a compressed elastic body 12 is included in a covering sheet 13 is provided at the end of the absorbent core 4. In the absorbent article 1 </ b> A, the auxiliary absorbent body 11 is provided adjacent to the inside of the rising flap 6. The auxiliary absorber 11 is attached to the inside of the rising flap 6 by a fixing means 14.

  In the absorbent article 1 </ b> A, when body fluid such as urine accumulates inside the rising flap 6, the covering sheet 13 of the auxiliary absorbent body 11 gets wet and at least a part of the covering sheet 13 is opened. As a result, the compressed elastic body 12 is released to the outside of the covering sheet 13, and body fluid is quickly absorbed by the elastic body 12 released from the compression external force, thereby preventing side leakage of body fluid such as urine.

  Another embodiment of the absorbent article of the present invention is shown in FIGS. FIG. 3 shows a plan view of a urine pad as an absorbent article as seen from the top sheet side. FIG. 4 is a cross-sectional view taken along the line BB of the absorbent article in FIG. Although FIG. 3 shows a case where the absorbent article 1B has an hourglass shape, the shape of the absorbent article 1B is not limited to this.

  In the absorbent article 1B, the absorbent core 4 is disposed between the top sheet 2 and the back sheet 3, and has a longitudinal direction y and a width direction x. The absorbent article 1B has no rising flaps on both sides of the absorbent core 4 in the width direction x.

  On the top sheet 2 side of the absorbent article 1B, an auxiliary absorbent body 11 in which a compressed elastic body 12 is included in a covering sheet 13 is provided outside the absorbent core 4 (outward in the width direction x). ing. The auxiliary absorbent body 11 extends in the longitudinal direction y in a region within 30 mm outward from both side edges in the width direction x of the absorbent core 4 and is attached to the top sheet 2 by the joining means 14. .

  In the absorbent article 1B, when a body fluid such as urine spreads in the width direction x beyond the region where the absorbent core 4 is present, the covering sheet 13 of the auxiliary absorbent body 11 gets wet and at least a part of the covering sheet 13 is released. The As a result, the compressed elastic body 12 is released to the outside of the covering sheet 13, and body fluid is quickly absorbed by the elastic body 12 released from the compression external force, thereby preventing side leakage of body fluid such as urine.

1: Absorbent article (urine pad)
2: Top sheet 3: Back sheet 4: Absorbent core 11: Auxiliary absorber 12: Elastic body 13: Cover sheet

Claims (7)

An absorbent core is disposed between the top sheet and the back sheet, the absorbent article having a longitudinal direction and a width direction,
On the top sheet side of the absorbent article, an auxiliary absorbent body in which a compressed elastic body is included in a covering sheet is provided at an end portion of the absorbent core or outside thereof,
The absorbent article is characterized in that at least a part of the covering sheet is opened when wet.   The absorbent article according to claim 1, wherein the auxiliary absorbent body is provided so as to extend substantially in the longitudinal direction on both sides in the width direction of the absorbent core.   The absorbent article according to claim 1 or 2, wherein the covering sheet is at least one selected from the group consisting of tissue paper, thin paper, polyvinyl alcohol film, wafer film, and gelatin film.   The absorbent article according to any one of claims 1 to 3, wherein the elastic body is a foamed polymer or a fiber lump. The covering sheet is joined by a water-soluble adhesive to form a bag, and the compressed elastic body is included therein,
The water-soluble adhesive includes at least one selected from the group consisting of starch paste, styrene-isoprene-styrene block copolymer (SIS), and styrene-ethylene-butadiene-styrene block copolymer (SEBS). Item 5. The absorbent article according to any one of Items 1 to 4. Standing flaps are provided on both sides in the width direction of the absorbent core,
The absorbent article according to any one of claims 1 to 5, wherein the auxiliary absorbent body is provided adjacent to the inside of the rising flap. No rising flaps are provided on both sides of the absorbent core in the width direction,
The absorption according to any one of claims 1 to 5, wherein the auxiliary absorber is provided in a region within 20 mm inward from a side edge in the width direction of the absorbent core or in a region within 30 mm outward. Sex goods.

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