JP2019170844A - Underpants type absorbent article - Google Patents

Abstract

To provide an underpants type absorbent article in which compression feeling on a hypogastrium and falling from a rear side are fully suppressed.SOLUTION: An underpants type absorbent article 1 is provided. The underpants type absorbent article 1 is configured so that a dimension of an arc between side seal parts 303 in a front side waist region 13B when the absorbent article is worn by a wearer such that a bottom surface of a cylinder matches a position having a depth of 150 mm from a waist opening part 11 on the outside of a cylinder having a circumference of 800 mm, is larger than a dimension of an arc between side seal parts 303 in a rear side waist region 15B by 40 mm or greater, and a stretch stress in a width direction of the rear side waist region 15B at a time point when the rear side waist region 15B is extended in a width direction up to 2.0 times a dimension in the width direction of the rear side waist region 15B before extension, then, is returned to 1.5 times the dimension in the width direction of the rear side waist region 15B before extension, is 1.3 times or greater the stretch stress of the front side waist region 13B subjected to the same test in the same condition.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pants-type absorbent article in which the feeling of pressure on the lower abdomen when worn and the slippage from the rear side (back side) are sufficiently suppressed.

  Conventionally, pants-type disposable diapers (hereinafter referred to as pants-type absorbent articles) have been used to absorb the excrement of infants, adults, and sick people. The pant-type absorbent article has a waist opening and a pair of leg openings, and has an absorbent main body that absorbs excrement and an exterior body that is a support member thereof, and the absorbent main body is worn from the front and the back. Covering the crotch. And a wearer's both legs are put in a leg opening part, and a paper diaper main body is pulled up to a trunk periphery and it wears.

  By the way, an elderly person who wears a pants-type absorbent article tends to lean forward and tends to have a body shape in which the lower abdomen protrudes due to a decrease in muscle strength of the abdomen. In addition, the pant-type absorbent article easily slips off from the rear side (back side) by adopting a forward leaning posture, and when the body shape has a lower abdomen protruding, the feeling of pressure on the lower abdomen when wearing the pant-type absorbent article There was a problem that it was easy to produce. As a method for solving such a problem, it is conceivable that the dimension of the front side (corresponding to the wearer's belly) of the exterior body is made larger than the dimension of the rear side (corresponding to the wearer's back). However, it is difficult to manufacture a pants-type absorbent article having such a shape at high speed, resulting in a problem that the manufacturing efficiency is lowered and the cost is increased. Then, the examination which paid its attention to the elastic elastic member provided along the width direction not in the dimension of an exterior body but in a waist area | region or a waist area is made | formed.

  As a pants-type absorbent article examined from such a viewpoint, for example, in Patent Document 1, a plurality of pant-type absorbent articles are provided along the width direction, which is a direction substantially orthogonal to the length direction from the front waistline portion to the rear waistline portion. A plurality of front waistline elastic members for expanding and contracting the front waistline part, and a plurality of the waistline stretchers along the width direction of the rear waistline part, for expanding and contracting the rear waistline part And the number of the front waistline elastic members is such that the total elongation stress of the plurality of front waistline elastic materials is substantially equal to the total elongation stress of the plurality of rear waistline elastic materials. A pants-type absorbent article is disclosed in which the plurality of front waistline elastic members and the plurality of rear waistline elastic materials are arranged so as to be larger than the number of rear waistline elastic materials. The document also describes the plurality of front waistline elastic members and the plurality of rear waistline elastic materials so that the total elongation stress of the plurality of front waistline elastic materials is substantially equal to the total elongation stress of the plurality of rear waistline elastic materials. By arranging the side waistline elastic material, the back side and the abdomen side of the wearer can be tightened evenly, and one of the front waistline part or the back waistline part is prevented from sliding down due to the increase in the weight of the disposable diaper It is described that it can.

  Patent Document 2 discloses a liquid-permeable top sheet, a liquid-impervious back sheet, an absorber disposed between the top sheet and the back sheet, and an outer surface side of the back sheet. The absorbent article body is provided integrally with the longitudinal direction, and the absorbent article body is integrally provided in the longitudinal direction, the back waistline portion located on the back side of the wearer, and the leg circumference portions on both sides in the width direction. And a crotch part having an abdomen and a ventral side waist part located on the abdomen side of the wearer, and both sides in the width direction of the back side waist part and both sides in the width direction of the abdomen waist part, A waist opening located around the waist and a pair of leg openings located around the legs of the wearer, and a waist elastic member disposed over the entire circumference of the edge of the waist opening; It has a plurality of back side elastic members that can be expanded and contracted in the width direction of the absorbent article body, and the back side waistline And a plurality of belly side elastic members that can be expanded and contracted in the width direction of the absorbent article body, and the absorbent article body is provided at the ventral waist part. And the back elastic member is provided more in number than the vent elastic member, and the waist elastic at the portion closest to the waist elastic member. The gap between the members is disposed at a position substantially equal to the gap between the waist elastic member at the portion closest to the waist elastic member of the belly elastic member, and the back elastic region is more than the belly elastic region. A pant-type absorbent article, wherein the absorbent article body is formed wide in the longitudinal direction of the absorbent article body, and the absorbent body is disposed at a position that does not overlap the abdominal elastic region and overlaps the back elastic region. Is disclosed.

JP 2012-217553 A Japanese Patent No. 4352003

  Here, in the pants-type absorbent article described in Patent Document 1, the plurality of front waistline elastic members have a total elongation stress that is substantially equal to the total elongation stress of the plurality of rear waistline elastic members. Since the front waistline elastic material and the plurality of rear waistline elastic materials are arranged, there is a possibility that a feeling of pressure is generated in the lower abdomen when worn by an elderly person whose lower abdomen protrudes. Further, in Patent Document 2, the back elastic member is provided more in number than the abdominal elastic member, and the distance between the waist elastic member and the waist elastic member is the abdominal elasticity. The member is disposed at a position substantially equal to the distance between the waist elastic member and the waist elastic member, and the back side elastic region is more in the longitudinal direction of the absorbent article body than the ventral side elastic region. It is described that it is formed wide, has good adhesion, and can be prevented from slipping off, but only with this ingenuity, especially when elderly people who are prone to lean forward wear the pant-type absorbent article, There was a possibility that the slipping from the rear side (back side) could not be prevented sufficiently. That is, even in the pant-type absorbent articles described in Patent Documents 1 and 2, both the reduction of the feeling of pressure in the lower abdomen and the difficulty of slipping off from the rear side (back side) can be sufficiently satisfied. It was not a thing. Therefore, this invention is made | formed in view of such a situation, and provides the underpants type absorbent article by which the feeling of pressure of a lower abdomen and the slipping off from the back side (back side) were fully suppressed. For the purpose.

  The inventors of the present invention have conducted extensive research in view of the above problems. As a result, when the area of the pants-type absorbent article disposed in the iliac area of the wearer at the time of wearing is the waistline area, the size of the waistline area on the front side at the time of wearing is set to the back waistline area. After adjusting the waist area to be larger than the predetermined range, and extending the waist region to a predetermined range, the back side elastic stress at the time of returning to the predetermined position is larger than the front side elastic stress. The present inventors have found that the problem can be solved and have completed the present invention. Specifically, the present invention provides the following.

  (1) A first aspect of the present invention includes an absorbent main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet. A pants-type absorbent article comprising an exterior body laminated with a nonwoven fabric and a stretchable member, wherein the exterior body comprises a front region, a crotch region, and a rear region, By joining both side edges of the front region and both side edges of the rear region with side seal portions, a waist opening, the front region, and the rear side are formed above the front region and the rear region, respectively. Leg openings are formed on both right and left sides of the crotch region between the regions, the front region is divided into a front waist region and a front waist region from the top, and the rear region is rear from the top. Side waist area The front waist region and the rear waist region are provided with a plurality of waist region stretchable members along the width direction, and the front waist region includes a front side The waist region stretchable member is provided in the rear waistline region, and a plurality of rear waistline stretchable members are provided along the width direction. A leg-hole stretchable member is provided along the opening, and the front waistline stretchable member and the back waistline stretchable member are arranged in the thickness direction of the pant-type absorbent article. The pant-type absorbent article was mounted on the outside of a cylinder having a circumference of 800 mm so that the bottom surface of the cylinder coincided with the position of a depth of 150 mm from the waist opening. On the front waist The size of the arc between the side seal portions of the region is 40 mm or more larger than the size of the arc between the side seal portions of the rear waist region, and the rear waist region before extending the rear waist region. After extending in the width direction up to 2.0 times the dimension in the width direction of the region and then returning to 1.5 times the size in the width direction of the rear waist region before extension, the rear The stretching stress in the width direction of the side waist region extends the front waist region in the width direction up to 2.0 times the width direction dimension of the front waist region before stretching, A pants-type absorbency that is 1.3 times or more with respect to the stretching stress in the width direction of the front waistline region when it is returned to 1.5 times the dimension in the width direction of the front waistline region. It is an article.

  (2) A second aspect of the present invention is the pant-type absorbent article according to (1), wherein the pant-type absorbent article is disposed outside a cylinder having a circumference of 800 mm, and the bottom surface of the cylinder is That the wearing pressure in the rear waistline region is 1.2 times or more than the wearing pressure in the front waistline region when fitted so as to coincide with a position 150 mm deep from the waist opening. It is a feature.

  (3) A third aspect of the present invention is the pant-type absorbent article according to (1) or (2), wherein the number of the rear waist region stretchable members is the front waist region stretchable It is characterized by being 1.5 times or more of the number of sex members.

  (4) A fourth aspect of the present invention is the pant-type absorbent article according to any one of (1) to (3), wherein an elongation rate of the rear waistline region is the front waistline region. The elongation ratio is 1.3 times or more.

  (5) A fifth aspect of the present invention is the pant-type absorbent article according to any one of (1) to (4), wherein the one back waist region stretchable member is stretched before stretching. At the time when the rear waistline stretchable member is stretched to 3.0 times the size of the rear waistline stretchable member before being stretched back to 2.0 times the size of the rear waistline stretchable member before stretching. The stretching stress of one said back waist region elastic member is 3.0 times as large as the size of the said front waist region elastic member before extending the one front waist region elastic member. After stretching, with respect to the stretching stress of one front waist region stretchable member at the time of returning to 2.0 times the size of the front waistline stretchable member before stretching, It is characterized by being 1.2 times or more.

  In the pant-type absorbent article of the present invention, when the pant-type absorbent article is mounted on the outside of a cylinder having a circumference of 800 mm so that the bottom surface of the cylinder coincides with a position having a depth of 150 mm from the waist opening, The size of the arc between the side seal portions in the front waist region is adjusted to be 40 mm or more larger than the size of the arc between the side seal portions in the rear waist region. Therefore, the feeling of pressure on the lower abdomen when worn can be sufficiently suppressed.

  Furthermore, after extending the rear waistline region in the width direction up to 2.0 times the widthwise dimension of the rear waistline region before extension, the widthwise dimension of the rear waistline region before extension. Stretching stress in the width direction of the rear waistline region at the time when it is returned to 1.5 times the width of the front waistline region up to 2.0 times the widthwise dimension of the front waistline region before stretching With respect to the expansion and contraction stress in the width direction of the front waistline region when the width is returned to 1.5 times the dimension in the width direction of the front waistline region before extension after being stretched in the width direction. It is adjusted to be 3 times or more. For this reason, it is possible to sufficiently suppress the feeling of pressure on the lower abdomen of the wearer and the slippage from the rear side (back side). Therefore, according to the present invention, it is possible to provide a pant-type absorbent article in which the pressure in the lower abdomen and the slippage from the rear side (back side) are sufficiently suppressed.

It is a perspective view of the underpants type absorbent article of the present invention. It is an expansion | deployment top view of the underpants type absorbent article of this invention.

  Hereinafter, the pants-type absorbent article 1 according to the embodiment of the present invention will be described. The position on the stomach side of the wearer when wearing the pant-type absorbent article 1 is referred to as “front” or “front side”, and the position on the back side of the wearer is referred to as “rear” or “rear side”. Called. Moreover, the surface which becomes the wearer's skin side when the pants-type absorbent article 1 is worn is referred to as “inside”.

<Pants-type absorbent article>
FIG. 1 is a perspective view of the pant-type absorbent article 1 of the present invention, and FIG. 2 is a developed plan view of the pant-type absorbent article 1 of the present invention. The pant-type absorbent article 1 extends around the absorbent main body 20 while overlapping the outer side of the absorbent main body 20 with the absorbent main body 20 having a substantially strip shape in the front-rear direction covering the crotch portion of the wearer from the front and rear. And an exterior body 30 constituting the outer shape of the pant-type absorbent article 1. And as shown in FIG.1 and FIG.2, the external shape of the underpants type absorbent article 1 is comprised by the exterior body 30, and the exterior body 30 is the front side area | region 13 contact | abutted to a wearer's abdomen, and a wearer's back part. It is divided into a crotch region 14 that is arranged so that a part of or the entire rear region 15 that contacts and the absorbent main body 20 overlap.

  In addition, it is preferable that the dimension of the longitudinal direction at the time of expansion | deployment of the underpants type absorbent article 1 before arrange | positioning an elastic member is 600 mm or more and 1000 mm or less, and the dimension of the width direction is 450 mm or more and 900 mm or less. By setting the dimensions of the pant-type absorbent article 1 before deployment of the elastic member within the above range, the pants-type absorbent article for adults of various sizes such as S size, M size, L size, etc. Can be provided.

[Absorbent body]
As shown in FIG. 2, the absorbent main body 20 includes a liquid-permeable top sheet 24, a liquid-impermeable back sheet 25, and an absorbent body 29 disposed between the top sheet 24 and the back sheet 25. Including. Similarly to the above, in order to be able to provide various size adult pants-type absorbent articles for adults, the absorbent body 20 has a longitudinal dimension of 300 mm to 500 mm and a width dimension of 100 mm. It is preferable that it is 300 mm or less.

(Top sheet)
The top sheet 24 may be formed from a base material having liquid permeability that allows body fluid to move to the absorbent body 29. For example, a nonwoven fabric such as a thermal bond nonwoven fabric or a spunbond nonwoven fabric, or a thermal bond / spunbond is laminated. It is composed of a material that is soft to touch and does not irritate the skin, such as a hydrophilic nonwoven material such as a composite nonwoven fabric. The top sheet 24 may be embossed or perforated on the surface in order to improve liquid permeability. As a method for performing these embossing and perforating processes, a known method can be carried out without limitation. In order to reduce irritation to the skin, the top sheet 24 may contain a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizing agent and the like. Furthermore, from the viewpoint of strength and workability, the basis weight of the top sheet 24 is preferably 18 g / m ² or more and 40 g / m ² or less. Although there is no restriction | limiting in particular as a shape of the top sheet 24, What is necessary is just the shape which covers the absorber 29 required in order to guide a bodily fluid to the absorber 29 so that there may be no leak.

(Back sheet)
The back sheet 25 may be formed using a base material having liquid impermeability so that the body fluid held by the absorbent body 29 does not wet the clothing, and is formed from a breathable or non-breathable resin film. The Examples of the resin film that can be used include polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene. From the viewpoint of strength and workability, the basis weight of the back sheet 25 is preferably 15 g / m ² or more and 40 g / m ² or less. Further, it is preferable to use a resin film having air permeability as the back sheet 25 in order to prevent stuffiness at the time of wearing. In order to provide the back sheet 25 with air permeability, for example, a filler may be blended in the resin film of the base material, or the back sheet 25 may be embossed. In addition, calcium carbonate can be mentioned as a filler, The compounding method can perform a well-known method without a restriction | limiting.

(Absorber)
The absorbent main body 20 includes an absorbent body 29 that is disposed between the top sheet 24 and the back sheet 25. The absorber 29 contains an absorbent fiber as a base material and a superabsorbent polymer (SAP). The absorbent fiber is not particularly limited as long as it is generally used for absorbent articles such as sanitary napkins, diapers, and urine removing pads. For example, fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, hydrophilic paper Can be mentioned. Among these, it is preferable to use fluff pulp from the viewpoint of absorbability. Examples of such fluff pulp include wood pulp, synthetic fiber, polymer fiber, non-wood pulp and the like that have been fibrillated into cotton. The absorbent fibers of the absorbent body 29 preferably have a basis weight of 50 g / m ² or more and 800 g / m ² or less so as not to impair the absorption performance and the touch.

The superabsorbent polymer used in the absorbent body 29 is not particularly limited as long as it absorbs body fluids and can prevent backflow. Sodium polyacrylate, polyaspartate, (starch-acrylic) An acid) graft copolymer, an (acrylic acid-vinyl alcohol) copolymer, an (isobutylene-maleic anhydride) copolymer and a saponified product thereof can be used. Among these, sodium polyacrylate is preferable from the viewpoint of the amount of absorption per weight. The SAP amount of the absorbent body 29 is preferably set to a basis weight of 10 g / m ² or more and 500 g / m ² or less, and a content of 15% by mass or more and 50% by mass or less so as not to impair the absorption performance and the touch. Is preferred.

  The form of the absorbent fiber and SAP in the absorbent body 29 is preferably a laminated mat formed by mixing SAP particles in the absorbent fiber. For the purpose of preventing leakage of SAP particles and stabilizing the shape of the absorber 29, it is preferable to wrap the absorber 29 in a carrier sheet. The base material of the carrier sheet is not particularly limited as long as it has hydrophilicity, and examples thereof include hydrophilic nonwoven fabrics such as tissue, absorbent paper, and airlaid nonwoven fabric. In the case where a plurality of carrier sheets are provided, the base material of the carrier sheet may be the same or different.

  The absorber 29 may be composed of two or more layers of absorbers, for example, a laminate of an upper layer absorber and a lower layer absorber. In this case, the dimensions of the upper layer absorber and the lower layer absorber in the longitudinal direction and the width direction may be such that the size of the upper layer absorber is larger than the size of the lower layer absorber, and the size of the upper layer absorber is the same as the size of the lower layer absorber. The dimension of an upper layer absorber may be smaller than the dimension of a lower layer absorber.

[Exterior body]
The exterior body 30 is a member that forms the outer shape of the pant-type absorbent article 1, and is laminated on the back sheet 25 side of the absorbent main body 20 and is formed by laminating a nonwoven fabric and a stretchable member. Although the aspect of a nonwoven fabric is not specifically limited, Generally it is comprised from the exterior nonwoven fabric sheet 301 and the interior nonwoven fabric sheet 302 of the body side of the exterior nonwoven fabric sheet 301. FIG. The exterior body 30 is composed of three regions, a front region 13, a crotch region 14, and a rear region 15. Here, regarding the division of these regions, in the longitudinal direction, a region in which a side seal portion 303 described later is provided (that is, a region in which the leg opening 12 is not formed) is defined as the front region 13 or the rear region 15, and the side seal portion 303 is provided. A region where the heel is not provided (that is, a region where the leg opening 12 is formed) is referred to as a crotch region 14.

  The exterior nonwoven fabric sheet 301 has a front region 13 and a rear region 15 that are substantially symmetrical about the center line of the crotch region 14, and the absorbent main body 20 is also disposed substantially symmetrically about the center line. The exterior nonwoven fabric sheet 301 (and the absorbent main body 20) is folded in half along the center line so that the absorbent main body 20 is on the inside, and both side edges of the front region 13 and the rear region 15 are side seal portions 303. It is joined via. Thereby, the exterior nonwoven fabric sheet 301 forms the waist opening part 11 which has a stretching property, and a pair of leg opening part 12, and comprises the pants type absorbent article 1 in the pants shape which can be attached or detached as a whole.

An interior nonwoven fabric sheet 302 is laminated inside the exterior nonwoven fabric sheet 301 so as to increase the strength of the exterior body 30. Moreover, in addition to the exterior nonwoven fabric sheet 301 and the interior nonwoven fabric sheet 302, the exterior body 30 is provided with an auxiliary sheet that covers the periphery of the absorbent main body 20, and this may be laminated on the interior nonwoven fabric sheet 302. The exterior nonwoven fabric sheet 301 and the interior nonwoven fabric sheet 302 are nonwoven fabrics such as thermal bond nonwoven fabric, air-through nonwoven fabric, and spunbond nonwoven fabric, preferably air-through nonwoven fabric or spunbond nonwoven fabric, and thermoplastic resins such as polypropylene, polyester, and polyethylene. The nonwoven fabric which consists of can be used. When these nonwoven fabrics are used, the basis weight thereof may be 10 g / m ² or more and 40 g / m ² or less.

(Aspects of front waist area and rear waist area)
Furthermore, in the present invention, as shown in FIGS. 1 and 2, the front region 13 is divided into a front waist region 13A and a front waist region 13B from the top, and the rear region 15 is divided from the top to the rear waist region. 15A and a rear waist region 15B. Here, the front waist region 13B and the rear waist region 15B refer to regions that touch the vicinity of the iliac when worn, and the front waist region 13A and the rear waist region 15A are respectively the front waist region 13B and the rear waist region. This refers to a region in the upper direction than the surrounding region 15B. The front waist region 13A and the rear waist region 15A are regions where a waist region elastic member 311 described later is disposed. Here, the front waist region 13 </ b> A and the rear waist region 15 </ b> A are 20 to 20 in the direction of the crotch region 14 from the side forming the waist opening 11 (that is, the side located at both ends in the longitudinal direction in FIG. 2). The area is up to about 60 mm. The front waist region 13B refers to a region excluding the front waist region 13A in the front region 13, and similarly, the rear waist region 15B refers to a region excluding the rear waist region 15A in the rear region 15. Say.

  The front waist region 13A and the rear waist region 15A are provided with a plurality of waist region stretchable members 311 along the width direction, and the leg openings 12 are stretched around the legs along the leg openings 12 at the periphery of the leg openings 12. A sex member 314 is provided. Thereby, the fitting property of the underpants type absorbent article 1 in the waist or leg circumference of the wearer when wearing the underpants type absorbent article 1 can be provided. The number of waist region stretchable members 311 in each region is preferably 4 or more and 12 or less, and the number of leg-hole stretchable members 314 (one leg opening 12 peripheral portion) is 1 or more. The number is preferably 5 or less.

  Further, a plurality of front waistline stretchable members 312 are provided in the front waistline region 13B, and a plurality of rear waistline stretchable members 313 are provided in the rear waistline region 15B along the width direction. ing. Thereby, the fitting property of the pants-type absorbent article 1 around the wearer's waist (position corresponding to the wearer's iliac region) can be imparted. In addition, when the absorbent body 20 and the front waist region elastic member 312 or the rear waist region elastic member 313 overlap in the thickness direction of the pant-type absorbent article 1, the absorber 20 in the overlapping region contracts. Then, since it is deformed, the absorbability is lowered and leakage tends to occur. For this reason, in order to prevent the absorber 20 from contracting, the front waist region stretchable member 312 and the rear waist region stretchable member 313 are formed in the absorbent body 20 in the thickness direction of the pant-type absorbent article 1. It is arranged so as not to overlap. In the present invention, mainly by devising the aspect of the front waistline region 13B and the back waist region 15B, the underpants type absorption that suppresses the pressure of the lower abdomen and the slippage from the rear side (back side) is suppressed. Obtaining the property article 1 is realized.

  In the present invention, the front waistline region when the pant-type absorbent article 1 is mounted on the outside of a cylinder having a circumference of 800 mm so that the bottom surface of the cylinder coincides with the position 150 mm deep from the waist opening 11 The size of the arc between the 13B side seal portions 303 is adjusted to be 40 mm or more larger than the size of the arc between the side seal portions 303 in the rear waistline region 15B. Therefore, the feeling of pressure on the lower abdomen when worn can be sufficiently suppressed, and particularly when the elderly person who protrudes the lower abdomen wears, the feeling of pressure on the lower abdomen can be effectively reduced. When tested under the above conditions, the dimension of the arc between the side seal portions 303 in the front waistline region 13B is 40 mm or more and 150 mm greater than the size of the arc between the side seal portions 303 in the rear waistline region 15B. The following is preferable. If the numerical value exceeds 150 mm, it tends to slip off from the front side when worn. Furthermore, the numerical range is more preferably 55 mm or more and 100 mm or less.

  Next, in the present invention, the rear waist region 15B is expanded in the width direction up to 2.0 times the width direction dimension of the rear waist region 15B before extension, and then the rear waist before extension. The stretching stress in the width direction of the rear waistline region 15B at the time when the width of the rear region 15B is returned to 1.5 times the width direction dimension causes the front waistline region 13B to expand the front waistline region 13B before extension. The front waist region at the time when the width of the front waist region 13B is extended to 1.5 times the width direction of the front waist region 13B before being stretched after being stretched in the width direction to 2.0 times the width direction dimension of It is adjusted to be 1.3 times or more with respect to the stretching stress in the width direction of 13B. Thereby, it is possible to suppress the feeling of pressure on the lower abdomen and slipping off from the back side (back side), especially when the elderly person who is easy to become a forward leaning posture and has a body shape protruding the lower abdomen, A feeling of pressure in the lower abdomen and slipping off from the rear side (back side) can be effectively suppressed. In addition, when tested under the above conditions, the stretching stress in the width direction of the rear waistline region 15B is 1.3 times to 2.5 times the stretching stress in the width direction of the front waistline region 13B. It is preferable that When the numerical value exceeds 2.5 times, the feeling of pressure on the back side (back side) of the wearer becomes too strong. Furthermore, the above numerical range is 1.5 times in order to more effectively suppress the pressure in the lower abdomen and the displacement from the rear while suppressing the feeling of pressure on the back side (back side) of the wearer. It is preferable that it is 2.0 times or more.

  A method for measuring the stretching stress will be described. First, the pant-type absorbent article 1 is unfolded as shown in FIG. 2, and both widthwise ends of the rear waistline region 15B are respectively attached to the chucks of the Tensilon type tensile tester, and the widthwise direction of the rear waistline region 15B. The measurement sample with both ends sandwiched between chucks is started to extend in the width direction under the condition of a crosshead moving speed of 300 mm / min, and the width direction dimension of the rear waistline region 15B before extension is 2.0. After extending in the width direction up to double, create an SS curve until returning to the original state, and extend in the width direction up to 2.0 times the width direction dimension of the rear waistline region 15B before expansion. After that, the numerical value on the SS curve at the time when it is returned to 1.5 times the dimension in the width direction of the rear waistline region 15B before expansion is read and used as the stretching stress. The same applies to the stretching stress in the width direction of the front waistline region 13B.

  Further, the rear waist region 15B when the pant-type absorbent article 1 is mounted on the outside of a cylinder having a circumference of 800 mm so that the bottom surface of the cylinder coincides with the position of a depth of 150 mm from the waist opening 11. Is preferably 1.2 times or more than the pressure of the front waistline region 13B. By setting the wearing pressure measured under the above conditions to the above range, the waist around the wearer's waist (the iliac region of the wearer) when an elderly person who is a body shape with a protruding lower abdomen is leaning forward Therefore, it is possible to suppress the slippage from the rear side (back side) when the forward leaning posture is achieved while suppressing the feeling of pressure in the lower abdomen. Further, it is more preferable that the pressure applied to the rear waistline region 15B is 1.2 times or more and 2.0 times or less than the pressure applied to the front waistline region 13B when tested under the above conditions. More preferably, they are 3 times or more and 1.7 times or less.

  For the measurement of the above-mentioned contact pressure, an air pack type contact pressure measuring device manufactured by IM Techno Corporation is used. Attach an air pack to the circumference measurement position of 800mm circumference, and attach the pant-type absorbent article 1 to the outside of the cylinder so that the bottom surface of the cylinder coincides with the position 150mm deep from the waist opening 11 The pressure difference between the air packs before and after the mounting is used as the reading pressure, and the pressure on the center line in the width direction of each of the rear waist region 15B and the front waist region 13B is read and used as the pressure in each region.

  Further, the number of the rear waistline stretchable members 313 is preferably 1.5 times or more than the number of the front waistline stretchable members 312. By adjusting in this way, it is possible to more effectively suppress the slippage from the rear side (back side) when the forward leaning posture is achieved while suppressing the feeling of pressure in the lower abdomen. In addition, if the numerical value becomes too large, the pressure applied to one of the front waist region stretchable members 312 increases, and the front waist region stretchable member 312 is hard to be in the lower abdomen, resulting in a feeling of pressure in the lower abdomen The number of the rear waist region stretchable members 313 is more preferably 1.5 times or more and 3.0 times or less, more preferably 1.7 times or more and 2 times the number of the front waist region stretchable members 312. More preferably, it is 5 times or less. In addition, it is preferable that the number of the rear waistline area elastic members 313 is 8 or more and 20 or less.

  Moreover, it is preferable that the expansion | extension rate of the back side waist region 13B is 1.3 times or more with respect to the expansion rate of the front side waist region 15B. By adjusting in this way, it is possible to more effectively suppress the slippage from the rear side when the forward leaning posture is achieved while suppressing the feeling of pressure in the lower abdomen. The stretch rate (%) indicates the length (%) at the time of each maximum stretch with respect to the length of each of the rear waistline region or the front waistline region in a stationary state. Moreover, when the said numerical value becomes large too much, in the manufacturing process of the underpants type absorbent article 1, when joining the both side edge part of the front side area | region 13, and the both side edge part of the rear side area | region 15 via the side seal part 303, respectively. Therefore, the stretch rate of the rear waistline stretchable member 313 per one piece is 1.3 times or more the stretch rate of the front waistline stretchable member 312 per stretch 2. It is more preferably 0.0 times or less, and further preferably 1.3 times or more and 1.5 times or less.

  Further, after extending one rear waistline stretchable member 313 to 3.0 times the size of the rear waistline stretchable member 313 before extension, the rear waistline zone before extension. When the elastic member 313 is returned to 2.0 times the size of the elastic member 313, the elastic stress of one rear waist region elastic member 313 expands one front waist region elastic member 312. After extending to 3.0 times the size of the front front waist region stretchable member 312 before returning to 2.0 times the size of the front waistline stretchable member 312 before stretching, It is preferable that it is 1.2 times or more with respect to the stretching stress of one front waist region stretchable member 312. By adjusting in this way, it is possible to more effectively suppress the slippage from the rear side when the forward leaning posture is achieved while suppressing the feeling of pressure in the lower abdomen. By using the stretchable members 312 and 313 having such properties, it becomes easy to adjust the relationship between the stretch stress and the pressure between the front waistline region 13B and the back waistline region 15B.

  Attach both ends of one back waist region stretchable member 313 to the chuck of a Tensilon tensile tester, and a measurement sample in which both ends of one back waist region stretchable member 313 are sandwiched between chucks, Under the condition of cross head moving speed 300mm / min, start to stretch, create SS curve until it is returned to the original state after stretching to 3.0 times the size of the rear waist area before stretching Then, after extending to 3.0 times the dimension of the rear waistline stretchable member 313 before stretching, read the numerical value on the SS curve at the time of returning to 2.0 times the dimension before stretching, The stretching stress is assumed. The same measurement is performed for one front waist region stretchable member 312.

Each of the elastic members 311, 312, and 313 described above is bonded to the exterior nonwoven fabric sheet 301 and the interior nonwoven fabric sheet 302. In addition, it is preferable that the interior nonwoven fabric sheet 302 and each elastic member 311, 312, 313 are bonded to each other via a hot melt adhesive interposed only in each elastic member.
As the elastic member, for example, a natural rubber, a synthetic rubber, polyurethane, or the like, a string, a string, or a flat shape can be used as appropriate, and the thickness is preferably not less than 300 dtex and not more than 1500 dtex.

[Production method of pant-type absorbent article]
There is no restriction | limiting in particular as a manufacturing method of the underpants type absorbent article 1, A conventionally well-known method can be employ | adopted, for example, the absorber 29 is pinched | interposed between the top sheet 24 and the back sheet 25, and a top sheet is used. 24 and back sheet 25 are joined to produce the absorbent main body 20, in the front waist region 13A, the front waist region 13B, the rear waist region 15A, the rear waist region 15B and the periphery of the leg opening 12, The step of disposing the above-described stretchable members 311, 312, 313 on the nonwoven fabric sheet 301 and the interior nonwoven fabric sheet 302 and joining them to the exterior nonwoven fabric sheet 301 and the interior nonwoven fabric sheet 302; The both side edges of the front region 13 and the side edges of the rear region 15 are joined via the side seal portions 303, respectively. Step, by the respective steps in the order of, it can be obtained pant-type absorbent article 1.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range of the invention as described in said embodiment, A various change or It will be apparent to those skilled in the art that improvements can be made. Further, it is apparent from the scope of the claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

  Hereinafter, the present invention will be described in detail with reference to examples. In addition, this invention is not limited to the Example shown below at all.

(Production of pants-type absorbent article)
First, fluff pulp and SAP are mixed, an absorber is prepared, the absorber is sandwiched between the top sheet and the back sheet, and a hot melt adhesive is used over the entire circumference of the top sheet and the back sheet. Fix and make an absorbent body. In the front waist region, the rear waist region, the front waist region, the rear waist region, and the periphery of the leg opening, each of the stretchable members described above is disposed on the exterior nonwoven fabric sheet and the interior nonwoven fabric sheet. Bonded to a nonwoven sheet. Then, an absorptive main body is arrange | positioned on the body side of an exterior body, the both-sides edge part of a front side area | region and a rear side area | region is connected through a side seal part, Examples 1 to 4, Comparative Example 1 and Comparative Example 2 A pant-type absorbent article was obtained. Note that a thermal bond nonwoven fabric was used as the top sheet, a spunbond nonwoven fabric was used as the exterior nonwoven fabric sheet and the interior nonwoven fabric sheet, and a breathable polyethylene film was used as the back sheet.

  Regarding the elastic members, six waist elastic members (thickness 1240dtex, thread-like synthetic rubber) are arranged in the front waist region and the rear waist region, respectively, along the width direction. (Thickness: 940 detex, thread-like synthetic rubber) was arranged on each of the left and right sides along the leg opening at the periphery of the leg opening. For the front waistline stretchable member and the back waistline stretchable member, a thread-like synthetic rubber having a thickness of 620 detex is used and arranged in the numbers shown in Table 1 in the front waistline region and the rear waistline region, respectively. I let you. In addition, the front waist region elastic member and the rear waist region elastic member were arranged so as not to overlap with the absorbent body (longitudinal direction 420 mm, width direction 190 mm) in the thickness direction of the pant-type absorbent article. The size of the pant-type absorbent article is 780 mm in the longitudinal direction and 560 mm in the width direction when the pant-type absorbent article is deployed before each elastic member is disposed (M for adults). It was adjusted to be equivalent to the size).

The following sensory evaluations were performed using each pant-type absorbent article thus obtained. In the sensory evaluation, ten adults with a waist size of 60 cm or more and 90 cm or less were used as panelists and each pants-type absorbent article was worn and lived, and evaluation was performed according to the following criteria.
(Sensory evaluation: No pressure on the lower abdomen)
◯: When there is no “feeling of pressure in the lower abdomen” or 3 or less Δ: When “feeling of pressure in the lower abdomen” is 4 or more and 7 or less ×: “There is a feeling of pressure in the lower abdomen” When there are 8 or more and 10 or less

(Sensory evaluation: feeling of slipping off the back side)
◯: When there is no “feeling of rear side slipping” or less than 3 people Δ: When “having rear side slipping feeling” is between 4 and 7 people ×: “feeling of rear side slipping” When there is 8 or more and 10 or less

(Sensory evaluation: Ease of movement when worn)
◯: When there is no “hard to move” or less than 3 people △: When “hard to move” is 4 or more and 7 people or less ×: When “hard to move” is 8 or more and 10 people or less

  As described above, according to the present invention, it is possible to provide a pant-type absorbent article that sufficiently suppresses the feeling of pressure on the lower abdomen and the slippage from the rear side, and further has ease of movement when worn. .

DESCRIPTION OF SYMBOLS 1 Pants type absorbent article 11 Waist opening 12 Leg opening 13 Front area 13A Front waist area 13B Front waist area 14 Inseam area 15 Rear area 15A Rear waist area 15B Rear waist area 20 Absorbent body 24 Top Sheet 25 Back sheet 29 Absorber 30 Exterior body 301 Exterior nonwoven fabric sheet 302 Interior nonwoven fabric sheet 303 Side seal part 311 Waist region stretchable member 312 Front waistline stretchable member 313 Rear waistline stretchable member 314 Leg stretchable stretch Element

Claims (5)

An absorbent body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, and an exterior body in which a nonwoven fabric and a stretchable member are laminated. A pant-type absorbent article comprising:
The exterior body consists of a front region, a crotch region, a rear region,
In the pant-type absorbent article, both side edges of the front region and both side edges of the rear region are joined by side seal portions, respectively, so that waist openings are formed above the front region and the rear region. , Leg openings on the right and left sides of the crotch region between the front region and the rear region, respectively,
The front region is divided into a front waist region and a front waist region from the top,
The rear region is divided into a rear waist region and a rear waist region from above.
In the front waist region and the rear waist region, a plurality of waist region stretchable members are provided along the width direction,
A plurality of front waist region elastic members are provided in the front waist region, and a plurality of rear waist region elastic members are provided in the width direction in the rear waist region,
A leg-hole stretchable member is provided along the leg opening at the periphery of the leg opening.
The front waist region elastic member and the rear waist region elastic member are arranged so as not to overlap the absorber in the thickness direction of the pant-type absorbent article,
A side seal in the front waist region when the pant-type absorbent article is mounted on the outside of a cylinder having a circumference of 800 mm so that the bottom surface of the cylinder coincides with a position having a depth of 150 mm from the waist opening. The dimension of the arc between the parts is 40 mm or more larger than the dimension of the arc between the side seal parts in the rear waistline region,
After extending the rear waist region in the width direction up to 2.0 times the width direction dimension of the rear waist region before extension, the width of the rear waist region before extension is increased. Stretching stress in the width direction of the rear waistline region at the time of returning to 1.5 times the size,
After extending the front waistline region in the width direction up to 2.0 times the widthwise dimension of the front waistline region before extension, 1 of the widthwise dimension of the front waistline region before extension A pant-type absorbent article that is 1.3 times or more of the expansion and contraction stress in the width direction of the front waistline region at the time when it is returned to 5 times.   When the pants-type absorbent article is mounted on the outside of a cylinder having a circumference of 800 mm so that the bottom surface of the cylinder coincides with a position having a depth of 150 mm from the waist opening, The pants-type absorbent article according to claim 1, wherein the wearing pressure is 1.2 times or more than the wearing pressure in the front waistline region.   The underpants type absorbent article according to claim 1 or 2, wherein the number of the back waist region stretchable members is 1.5 times or more of the number of the front waist region stretchable members.   The pants-type absorbent article according to any one of claims 1 to 3, wherein an extension rate of the rear waistline region is 1.3 times or more with respect to an extension rate of the front waistline region. After extending the one rear waistline stretchable member to 3.0 times the size of the rear waistline stretchable member before stretching, the rear waistline stretchable before stretching The elastic stress of the one back waist region elastic member at the time when it is returned to 2.0 times the size of the elastic member,
After the one front waistline stretchable member is stretched to 3.0 times the size of the front waistline stretchable member before stretching, the front waistline stretchable member before stretched It is 1.2 times or more with respect to the elastic | stretching stress of the one said front waistline area elastic | stretch member at the time of returning until it becomes 2.0 time of a dimension. Pants-type absorbent article.