JP2018033733A - Pants type absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pants-type absorbent article having good breathability and a soft touch of a non-woven fabric sheet. The present invention has an absorbent main body composed of a top sheet, a back sheet, and an absorber, and an exterior body composed of an exterior non-woven fabric sheet and an interior non-woven fabric sheet, and has a waist opening. In the peripheral edge of the portion, the peripheral edge of the leg opening, the front waist circumference region, the rear waist circumference region, and the crotch region, a plurality of elastic elastic members are arranged between the exterior non-woven fabric sheet and the interior non-woven fabric sheet, and the exterior non-woven fabric sheet is provided. The interior non-woven fabric sheet is a non-woven fabric having an uneven embossed pattern, and the interior non-woven fabric sheet and the stretchable elastic member are the interior non-woven fabric sheet in a state where the stretchable elastic member is stretched. Provided is a pants-type absorbent article bonded to the bottom of an embossed pattern of non-woven fabric. [Selection diagram] Fig. 1

Description

  The present invention relates to a pants-type absorbent article having good air permeability and good non-woven sheet feel.

  Conventionally, pants-type disposable diapers (pants-type absorbent articles) have been used to absorb the excrement of infants, adults, and sick people. The pants-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 supporting member thereof, and the absorbent main body is worn from the front and 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.

  In such a pants-type absorbent article, stretchable elastic members are disposed between the nonwoven fabric sheets constituting the exterior body, such as around the front and back waists, around the front and back waists, around the left and right legs, and the crotch region. And the elastic elastic member arranged in each part constitutes a gather, and prevents the leakage of bodily fluids or gives a comfortable wearing feeling by fitting the absorbent article to the wearer's body. Yes. However, in some cases, these elastic elastic members may overtighten the body, thereby impairing the air permeability from the absorbent article to the outside, or rubbing the skin with gather pleats, resulting in poor touch. In some cases, there was a pleasure.

  As an invention that addresses such a problem, for example, Patent Document 1 discloses a composite stretchable member having a stretchable portion including two sheet members and a plurality of elastic members disposed between the two sheet members. The two sheet materials are intermittently joined to each other in the direction of expansion and contraction of the expansion / contraction part and the direction perpendicular thereto, and the elastic member is arranged in the expansion / contraction part so as not to pass through the connection part between the two sheets. And a composite elastic member that is fixed to both sheet materials at both ends thereof, and each of the both sheet materials forms a plurality of pleats extending continuously over a plurality of elastic members. It is disclosed.

  Patent Document 2 discloses a disposable diaper in which a cushion portion is formed on both or either of the front body and the back body, and the cushion portion includes an inner sheet and a non-facing surface of the inner sheet. An outer sheet positioned on the side, one or a plurality of waist elastic members fixed between the inner sheet and the outer sheet in a state of extending along the width direction of the disposable diaper, and both the inner sheet and the outer sheet Or a cushion-forming sheet that is superimposed on either one and intermittently joined so that the joined portions and the non-joined portions are alternately continued in the width direction, and the joined portions are respectively along the longitudinal direction. The extending linear joining lines are formed in two or more rows, the interval between the junctions is defined as the first interval, and the interval between the rows of the junction lines in the junction is the second interval. When defined as the interval of , The second spacing is narrower than the first interval, the disposable diaper is disclosed.

Japanese Patent Laid-Open No. 2005-080859 JP, 2006-042917, A

  However, the breathability in the pant-type absorbent article using the inventions described in Patent Documents 1 and 2 and the touch of the nonwoven fabric sheet are still unsatisfactory. Therefore, this invention is made | formed in view of the above subject, and it aims at providing the underpants type absorbent article with favorable air permeability and the touch of a nonwoven fabric sheet.

  The inventors of the present invention have conducted extensive research in view of the above problems. As a result, the interior nonwoven fabric sheet located in the body measurement of the exterior body is a nonwoven fabric having an uneven emboss pattern, and the stretchable elastic member disposed between the interior nonwoven fabric sheet and the exterior nonwoven fabric sheet is in an expanded state. According to the pants-type absorbent article joined to the bottom of the uneven embossed pattern of the interior nonwoven fabric sheet, it was found that the above problems can be solved, and the present invention has been completed. Specifically, the present invention provides the following.

  (1) In the first aspect of the present invention, a waist opening is formed in the upper part of the front waistline region and the rear waistline region, and leg openings are formed on both left and right sides of the crotch region between the front waistline region and the rear waistline region. A pant-type absorbent article, wherein the pant-type absorbent article is a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet An exterior body composed of an absorbent main body composed of, an exterior nonwoven fabric sheet constituting the outer shape of the pant-type absorbent article, and an interior nonwoven fabric sheet provided on the body side with respect to the exterior nonwoven fabric sheet, And having the outer periphery of the waist opening, the periphery of the leg opening, the front waistline region, the rear waistline region, and the crotch region, the exterior nonwoven fabric sheet and the interior Between the woven fabric sheets, a plurality of elastic elastic members are arranged and joined to the exterior nonwoven fabric sheet and the interior nonwoven fabric sheet, the interior nonwoven fabric sheet is a nonwoven fabric having an uneven embossed pattern, The interior nonwoven fabric sheet and the stretchable elastic member are pants-type absorbent articles that are joined to the bottom of the embossed pattern of the unevenness of the interior nonwoven fabric sheet when the stretchable elastic member is extended.

  (2) A second aspect of the present invention is the pant-type absorbent article according to (1), wherein the height of the convex portion of the embossed pattern of the concave and convex portions of the interior nonwoven fabric sheet absorbs the exterior body. It is 1.0 mm or more and 3.0 mm or less in a state where it is stretched 200% in the width direction of the adhesive article, and 2.0 mm or more and 6.0 mm or less in a state where the exterior body is not stretched. Is.

  (3) A third aspect of the present invention is the pant-type absorbent article according to (1) or (2), wherein the uneven embossed pattern of the interior nonwoven fabric sheet has the exterior body as an absorbent article. The size in the width direction is larger than the size in the longitudinal direction in a state of extending 200% in the width direction.

  (4) A fourth aspect of the present invention is the pant-type absorbent article according to any one of (1) to (3), wherein the interior nonwoven fabric sheet is an air-through nonwoven fabric or a spunbond nonwoven fabric. It is characterized by.

  (5) A fifth aspect of the present invention is the pant-type absorbent article according to any one of (1) to (4), wherein the interior nonwoven fabric sheet and the stretchable elastic member are the stretchable It adheres through the hot-melt-adhesive agent which intervenes only in an elastic elastic member.

  (6) A sixth aspect of the present invention is the pant-type absorbent article according to any one of (1) to (5), wherein the interior nonwoven fabric sheet and the exterior nonwoven fabric sheet are the stretchable properties. It is characterized by being joined by heat or ultrasonic waves at a site where no elastic member exists.

  In the pants-type absorbent article of the present invention, a nonwoven fabric having an uneven embossed pattern is used as the interior nonwoven fabric sheet that directly touches the wearer's skin. Since the nonwoven fabric having an uneven embossed pattern has a soft touch, the use of such a nonwoven fabric as an interior nonwoven fabric sheet improves the touch of the pant-type absorbent article. Further, in the pant-type absorbent article of the present invention, a plurality of stretchable elastic members are arranged between the exterior nonwoven fabric sheet and the interior nonwoven fabric sheet, and the unevenness of the interior nonwoven fabric sheet is in a stretched state. The interior nonwoven fabric sheet and the stretchable elastic member are joined in a state where it is joined to the bottom of the embossed pattern. Thereby, a gap is formed between the interior nonwoven fabric sheet and the wearer's skin when the pant type absorbent article is worn, and the air permeability of the pant type absorbent article is maintained well.

It is a perspective view of the underpants type absorbent article of this invention. It is an expanded view of the underpants type absorbent article of this invention. (A1) Plan view of the interior nonwoven fabric sheet when the exterior body is stretched by 200%, (a2) Cross-sectional view showing the state of the interior nonwoven fabric sheet, the stretchable elastic member, and the exterior nonwoven fabric sheet when the exterior body is stretched by 200% (B1) It is a top view of the interior nonwoven fabric sheet at the time of non-elongation, (b2) It is sectional drawing which shows the state of the interior nonwoven fabric sheet at the time of non-elongation, an elastic elastic member, and an exterior nonwoven fabric sheet. Sectional drawing which shows the state of (a) interior nonwoven fabric sheet, stretchable elastic member, and exterior nonwoven fabric sheet when the exterior body is stretched by 200%, and (b) when the exterior body is not stretched. It is sectional drawing which shows the state of an interior nonwoven fabric sheet, a stretchable elastic member, and an exterior nonwoven fabric sheet.

  Hereinafter, the underpants type absorbent article 1 which concerns on embodiment of this invention is demonstrated. In addition, the position which becomes a wearer's belly side when wearing the pants-type absorbent article 1 is referred to as “front” or “front side”, and the position which is the wearer's back side is referred to as “rear” or “rear side”. Called. Moreover, the surface which becomes a wearer's skin side when the underpants type absorbent article 1 is worn is referred to as “inside”.

<Pants type absorbent article>
FIG. 1 is a perspective view of a pants-type absorbent article of the present invention, and FIG. 2 is a development view of the pants-type absorbent article of the present invention. The pants-type absorbent article 1 is a pants-type that extends around the absorbent main body 20 while overlapping the outer side of the absorbent main body 20 with an absorbent main body 20 having a shape elongated 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 absorbent article 1. As shown in FIG. 1, the pant-type absorbent article 1 whose outer shape is configured by the exterior body 30 has a waist opening 11 at the upper part of the front waistline region 13 and the rear waistline region 15, and the front waistline region. Leg openings 12 are formed on both the left and right sides of the crotch region 14 between the front waist region 13 and the rear waist region 15. The leg openings 12 are roughly divided into the front waist region 13 that contacts the wearer's abdomen and the back of the wearer. It is divided into a crotch region 14 in which the rear waistline region 15 in contact and the absorbent main body 20 are disposed.

[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.

(Top sheet)
The top sheet 24 may be formed from a base material having liquid permeability so that the body fluid moves to the absorbent body. For example, a nonwoven fabric such as a thermal bond nonwoven fabric or a spunbond nonwoven fabric, or a thermal bond / spunbond laminated. It is composed of materials that are soft to touch and do not irritate the skin, such as hydrophilic nonwoven materials such as composite nonwoven fabrics. 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 absorbing 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 100 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 absorber 29 is preferably 50 g / m ² or more and 500 g / m ² or less, and preferably 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 configures the outer shape of the pant type absorbent article 1, forms the waist opening 11 and the leg opening 12, and forms the outer shape of the pant type absorbent article 1. It is composed of an interior nonwoven fabric sheet 302 on the body side of the nonwoven fabric sheet 301.

(Exterior nonwoven sheet and interior nonwoven sheet)
The exterior nonwoven fabric sheet 301 includes a front waistline region 13 and a rear waistline region 15 that are substantially symmetrical about the center line that becomes the crotch region 14, and the absorbent main body 20 is also disposed substantially symmetrically about the center line. ing. And 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 waistline region 13 and the rear waistline region 15 overlap each other. Have connected. Thereby, the exterior nonwoven fabric sheet 301 forms the elastic waist opening part 11 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. When the pants-type absorbent article 1 is worn, the front waistline region 13 covers the waist and crotch region on the wearer's belly side, and the back waistline region 15 covers the waist and crotch region on the wearer's back side. It has become.

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 include 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 using these nonwoven fabrics, the basis weight may be 18 g / m ² or more and 40 g / m ² or less.

In the pants-type absorbent article 1 of the present invention, the interior nonwoven fabric sheet 302 is a nonwoven fabric having an uneven emboss pattern. When the interior nonwoven fabric sheet 302 has an uneven embossed pattern, the touch when the pant-type absorbent article 1 is worn is good. Examples of the embossing pattern formed on the interior nonwoven fabric sheet 302 include round and polygonal embossing patterns such as a triangle, a quadrangle, a pentagon, a hexagon, a heptagon, an octagon, a pentagon, and a decagon, Although the dimension in the longitudinal direction and the dimension in the width direction may be the same or different, the dimension in the width direction is the dimension in the longitudinal direction when the exterior body 30 is extended by 200% in the width direction of the absorbent article. Is preferably larger. Here, the “200% stretched state” refers to a state in which the dimension in a non-stretched state is 100% and the dimension in a non-stretched state is doubled. More specifically, as shown in FIG. 3, the dimension of the emboss pattern in the longitudinal direction is 3.0 mm or more and 7.0 mm or less in a state where the exterior body 30 is extended by 200% in the width direction of the absorbent article. The dimension in the width direction is preferably 7.0 mm or more and 13.0 mm or less, and the dimensions in the longitudinal direction and the width direction are not extended in the width direction of the absorbent article. It is preferable that it is 3.0 mm or more and 7.0 mm or less. In addition, the height of the convex portions of the uneven emboss pattern is preferably 1.0 mm or more and 3.0 mm or less in a state where the exterior body 30 is extended by 200% in the width direction of the absorbent article. It is preferable that it is 2.0 mm or more and 6.0 mm or less in the state which is not extended | stretched in the width direction of an absorbent article. In addition, it is preferable that the interior nonwoven fabric sheet 302 and the exterior nonwoven fabric sheet 301 are joined by heat or ultrasonic waves at a site where the elastic elastic member 31 described later does not exist.

[Elastic elastic member]
The pants-type absorbent article 1 of the present invention includes an exterior nonwoven fabric sheet 301 and an interior nonwoven fabric in the periphery of the waist opening 11, the periphery of the leg opening 12, the front waistline region 13, the back waistline region 15, and the crotch region 14. A plurality of elastic elastic members 31 are disposed between the sheets 302, and are joined to the exterior nonwoven fabric sheet 301 and the interior nonwoven fabric sheet 302. And unlike the conventional pants type absorbent article shown in FIG. 4, the stretchable elastic member 31 is joined to the bottom of the embossed pattern of the unevenness of the interior nonwoven fabric sheet 302 in a stretched state. By adopting such a configuration, in the state where the pant-type absorbent article 1 is worn, wrinkles along the uneven embossed pattern are formed on the interior nonwoven fabric sheet 302, and the wearer and the pant-type absorbent article 1 are formed. Since the gap is maintained between the interior nonwoven fabric sheets 302, the air permeability of the pant-type absorbent article 1 is maintained well. In addition, it is preferable that the interior nonwoven fabric sheet 302 and the stretchable elastic member 31 are bonded to each other via a hot melt adhesive interposed only in the stretchable elastic member 31.

  As the elastic member constituting the stretchable elastic member 31, for example, natural rubber, synthetic rubber, polyurethane, or other thread-like, string-like or flat-shaped ones can be used as appropriate, and the thickness thereof is 620 dtex or less. Preferably there is.

DESCRIPTION OF SYMBOLS 1 Pants type absorbent article 11 Waist opening 12 Leg opening 13 Front waistline area 14 Crotch area 15 Rear waistline 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 31 Elastic elastic member

Claims (6)

A pants-type absorbent article in which a waist opening is formed at the upper part of the front waistline region and the rear waistline region, and leg openings are formed on the left and right sides of the crotch region between the front waistline region and the rear waistline region. ,
The pants-type absorbent article is
An absorbent main body composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet;
An exterior body composed of an exterior nonwoven fabric sheet constituting the outer shape of the pant-type absorbent article, and an interior nonwoven fabric sheet provided on the body side with respect to the exterior nonwoven fabric sheet, and
In the periphery of the waist opening, the periphery of the leg opening, the front waistline region, the back waistline region, and the crotch region, a plurality of elastic elasticity is provided between the exterior nonwoven fabric sheet and the interior nonwoven fabric sheet. A member is disposed and joined to the exterior nonwoven fabric sheet and the interior nonwoven fabric sheet;
The interior nonwoven fabric sheet is a nonwoven fabric having an uneven embossed pattern,
The said interior nonwoven fabric sheet and the said elastic elastic member are the pants type absorbent articles joined to the bottom part of the embossed pattern of the unevenness | corrugation of the said interior nonwoven fabric sheet in the state which the said elastic elastic member extended | stretched.   The height of the convex part of the uneven embossed pattern of the interior nonwoven fabric sheet is 1.0 mm or more and 3.0 mm or less in a state where the exterior body is stretched by 200% in the width direction, and the exterior body is stretched. The underpants-type absorbent article according to claim 1, wherein the pants-type absorbent article is 2.0 mm or more and 6.0 mm or less in a state where there is no.   The uneven | corrugated embossing pattern of the said interior nonwoven fabric sheet is the state which extended the said exterior body 200% in the width direction of the absorbent article, and the dimension of the width direction is larger than the dimension of a longitudinal direction. Pants type absorbent article.   The pants-type absorbent article according to any one of claims 1 to 3, wherein the interior nonwoven fabric sheet is an air-through nonwoven fabric or a spunbond nonwoven fabric.   The underpants type absorptivity according to any one of claims 1 to 4, wherein the interior nonwoven fabric sheet and the stretchable elastic member are bonded via a hot melt adhesive interposed only in the stretchable elastic member. Goods.   The pants-type absorbent article according to any one of claims 1 to 5, wherein the interior nonwoven fabric sheet and the exterior nonwoven fabric sheet are joined by heat or ultrasonic waves at a site where the stretchable elastic member does not exist. .

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