TWI538665B - Type disposable wearing article - Google Patents

Description

Disposable wearing items

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a disposable wearing article, and more particularly to a disposable disposable diaper, a disposable disposable learning pants, a disposable incontinence pants, and after use. Disposable wearing articles such as disposable physiological pants.

In the past, one has: a longitudinal direction and a lateral direction orthogonal to each other; a skin facing surface and a non-skin opposing surface, and includes: a front waist region and a back waist region facing each other on the opposite surface of the skin; a subgingival region between the front waist region and the rear waist region; a front waist elastic body extending in a lateral direction in the front waist region; and a rear waist extending in the lateral waist region The elastic body and the disposable wearing article which are provided after the liquid absorbing structure for absorbing the body fluid in the underarm region are well known.

For example, Patent Document 1 discloses a disposable disposable diaper that is disposed in a state where a portion where the back waist elastic body and the liquid-absorbent structure are overlapped is cut.

According to the disposable disposable diaper, it is possible to prevent the liquid-absorbent structure from contracting laterally due to the contraction force of the back waist elastic body.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent No. 4421012

It is disclosed that the disposable diaper of the patent document 1 is disposed in a state in which a part of the waist elastic body is cut, so that the adhesion of the liquid absorbing structure to the skin is lowered, and in the state of wearing the diaper, The problem that the liquid-absorbent structure leaves from the skin exists.

In view of the above, the present invention provides a disposable wearing article which prevents the liquid-absorbent structure from contracting in the lateral direction and which can improve the adhesion of the liquid-absorbent structure to the skin.

In order to solve the above problems, the present invention has a lateral direction and a longitudinal direction which are orthogonal to each other, a confrontation surface with respect to the skin, and a non-skin contrast surface, and includes a front waist region and a rear surface opposite to each other on the opposite surface of the skin. a waist region; a crotch region between the front waist region and the front waist region; a waist member disposed in the front waist region and the back waist region; and a crotch member disposed in the armpit region; The liquid-absorbent structure provided on the underarm member and the disposable wearing article after the waist member is used in the laterally extending waist elastic body are premised.

In the disposable wearing article, the waist member has an outer end edge portion and an inner end edge portion facing the longitudinal direction, and at least the elastic sheet in the lateral direction is stretchable. The waist elastic body includes: a first waist elastic body disposed on a side of an outer edge portion of the waist member; and a second waist elastic body disposed on a side of an inner edge portion of the waist member, The second waist elastic body is not present in a region of the liquid-absorbent structure, and the elastic sheet has both side edges of the lateral sheet; and an outer edge portion of the sheet facing the longitudinal direction and an inner edge of the sheet In the at least a central portion, the inner edge portion of the sheet is fixed to the crotch member, and when a tensile force is applied between the side edges of the sheet, the longitudinal dimension in the central region is larger than the sides of the sheet. In a smaller aspect in which the aforementioned longitudinal dimension in the edge portion is changed, at least the central region is narrowed and deformed.

According to the disposable wearing article of the present invention, since the second waist elastic body does not exist in the region of the liquid-absorbent structure, the liquid-absorbent structure can be prevented from being contracted by the second waist elastic body before and after. Shrinking in the lateral direction.

In addition, the elastic sheet is fixed at least in the central region, and the inner edge portion of the sheet is fixed to the underarm member. When a tensile force is applied between the side edges of the sheet, the longitudinal dimension in the central domain is larger than the sides of the sheet. In the smaller aspect of the longitudinal dimension, at least the central domain is narrowed and deformed. Therefore, by wearing the disposable wearing article, the elastic sheet is narrowed in the central region, and the elastic sheet can be lifted upward to raise the central portion of the squat member, thereby preventing the liquid-absorbent structure from tightening to the skin. Reduced adhesion.

[Formation for carrying out the invention]

Figure 1 is a view of the disposable wearing article of the present invention. A perspective view of the disposable diaper 10. In Fig. 1, X represents a lateral direction, and Y represents a longitudinal direction orthogonal to the lateral direction X. The disposable diaper 10 has a non-skin contrast surface with respect to the wearer's skin facing surface and the opposite surface.

The disposable diaper 10 includes an annular waist member 11 that extends in the waistline direction of the wearer, and a crotch member 40 that is coupled to the waist member 11 and extends in the longitudinal direction Y. The waist member 11 is formed by annularly connecting the front waist member 20 and the back waist member 30.

The disposable diaper 10 has a waist opening 15 formed by the front outer edge portion 201 and the waist outer edge portion 311 of the back waist member 30 which will be described later of the front waist member 20, and has two later described by the crotch member 40. The side edge portion 40s and the front inner edge portion 202 of the front waist member 20 or the pair of leg circumference openings 16 of the waist inner edge portion 312 of the back waist member 30.

Fig. 2 is a developed view showing a part of the disposable diaper 10 broken, and Fig. 4 is an enlarged cross-sectional view taken along line IV-IV of Fig. 2. In Fig. 2, P is an imaginary longitudinal center line which divides the length dimension of the lateral direction X into two equal parts in the state in which the disposable diaper 10 is unfolded, and Q indicates that the length dimension of the longitudinal direction Y is divided into two equal parts in the state in which the disposable diaper 10 is unfolded. Imagine the horizontal center line. The disposable diaper 10 is symmetrical with respect to the imaginary longitudinal center line P. Further, in Fig. 4, Z represents a thickness direction orthogonal to the longitudinal direction Y and the lateral direction X, respectively.

In the wearing state shown in FIG. 1, the disposable diaper 10 has the front waist region 12 and the back waist region 13 which face each other on the opposite surface of the skin. The front waist member 20 is disposed in the front waist region 12, and the rear waist member 30 is disposed in the rear waist region 13.

The disposable diaper 10 has an underarm region 14 between the front waist region 12 and the back waist region 13 in the longitudinal Y position. The underarm member 40 is disposed in the underarm region 14.

The front waist member 20 is a front outer edge portion 201 extending toward the lateral direction X on the side where the imaginary transverse center line Q is separated, and a front inner edge portion 202 extending toward the lateral direction X on the side close to the imaginary transverse center line Q; The front side edge portions 203 which are connected to the front end portion 201 and the front inner end edge portion 202 in the longitudinal direction Y are defined in a rectangular shape.

The back waist member 30 is formed by a rectangular waist guard portion 31 that forms a horizontal X dimension larger than the longitudinal Y dimension, and a hip cover portion 32 that connects the waist cover portion 31.

The waist cover portion 31 is formed to be the same size as the front waist member 20. That is, the waist cover portion 31 is composed of a waist outer edge portion 311 extending in the lateral direction X on the side separated from the imaginary transverse center line Q, and a waist inner edge extending in the lateral direction X on the side close to the imaginary transverse center line Q. The portion 312 and the waist-side edge portions 313 connecting the waist outer edge portion 311 and the waist inner edge portion 312 extending in the longitudinal direction Y are defined in a rectangular shape.

The hip cover portion 32 is formed in a substantially trapezoidal shape extending from the waist inner edge portion 312 of the waist panel portion 31 toward the side of the imaginary transverse center line Q. That is, the buttocks cover portion 32 is composed of a buttock outer edge portion 321 that coincides with the waist inner edge portion 312, a buttock inner edge portion 322 that extends toward the lateral direction X, and a buttock outer edge portion 321 and a buttock inner end. The both side edges 323 of the buttocks, which are inclined to extend in the longitudinal direction Y, are defined as substantially trapezoidal. The hip cover portion 32 covers the buttocks of the wearer wearing the disposable diaper 10.

The front side edge portions 203 of the waist member 20 and the waist side edge portions 313 of the back waist member 30 are superposed on each other before the skin facing faces are opposed to each other, and are joined by the fusing portions 17 which are intermittently arranged in the longitudinal direction Y.

The front waist member 20 and the back waist member 30 include a non-elastic sheet 50 that is substantially non-stretchable in the lateral direction X and the longitudinal direction Y, and an elastic sheet 55 that is stretchable in the lateral direction X and the longitudinal direction Y. In the disposable diaper 10 described in this example, two sheets of non-elastic sheets 50 are used. In the non-elastic sheet 50 of the two sheets, the portion 56 facing each other in the thickness direction Z is the first non-elastic sheet 51 on the side opposite to the skin, and the second non-elastic sheet is on the side opposite to the skin. Sheet 52.

The first non-elastic sheet 51f forming the front waist member 20 has an elongated rectangular shape in which the size of the lateral direction X is larger than the size of the longitudinal direction Y.

The first non-elastic sheet 51b forming the back waist member 30 includes the entire area of the buttocks portion 32, and a part of the waist cover portion 31, specifically, the inner edge portion of the waist circumference from the waist cover portion 31 adjacent to the hip cover portion 32. 312 is a portion that extends toward the side separated from the imaginary transverse center line Q.

The second non-elastic sheet 52f forming the front waist member 20 has an elongated rectangular shape in which the size of the lateral direction X is longer than the size of the longitudinal direction Y.

The second non-elastic sheet 52b forming the back waist member 30 is provided over the entire area of the buttocks portion 32 and is provided over the entire waist cover portion 31.

The second non-elastic sheets 52b and 52f have a body portion 53 that extends from the portion 56 facing the skin facing surface side of the first non-elastic sheet 51 toward the longitudinal direction Y and is separated from the virtual transverse center line Q; The outer end edge portions 201 and 311 of the main body portion 53 face the bent portion 54 on the skin facing surface side.

The main body portion 53 covers the entire non-skin opposing surface side of the front and rear waist members 30 and 30, and the bent portion 54 covers a part of the skin facing surface of the main body portion 53 (the skin facing surface on the side of the outer end edge portions 201 and 311) ).

In the front waist region 12, the elastic sheet 55f covers the skin facing surface of the sheet outer edge portion 519f of the first non-elastic sheet 51f. The distal end flap 47f of the crotch member 40, which will be described later, covers the skin facing surface of the outer edge portion 559f of the elastic sheet 55f. The bent portion 54 of the second non-elastic sheet 52 covers the skin facing surface of the front end edge 40f of the underarm member 40.

In the rear waist region 13, the rear end flap 47b, which will be described later, of the crotch member 40 covers the skin facing surface of the outer end edge portion 519b of the first non-elastic sheet 51b. The elastic sheet 55b covers the skin facing surface of the rear end edge 40b of the underarm member 40. The bent portion 54 of the second non-elastic sheet 52 covers the sheet outer edge portion 559b of the elastic sheet 55b.

For the first non-elastic sheets 51b and 51f and the second non-elastic sheets 52b and 52f, substantially non-stretchable SMS (spun-bonded melt-spun spun) fiber nonwoven fabrics each having a mass of about 15 to 30 g/m ² can be used. A fiber non-woven fabric or a hot air fiber non-woven fabric, or a plastic sheet, or a laminated sheet or the like. These sheets 51b, 51f, 52b, and 52f are joined by a joining means such as a hot-melt adhesive applied to the inner surfaces of one of the sheets 51b, 51f, 52b, and 52f.

The elastic sheet 55 includes an elastic sheet 55f disposed in the front waist region 12, and an elastic sheet 55b disposed in the back waist region 13. The elastic sheets 55b, 55f have an elongated rectangular shape in which the size of the lateral direction X is longer than the size of the longitudinal direction Y.

A stretchable fiber nonwoven fabric is used for the elastic sheets 55b and 55f. As a stretchable fiber nonwoven fabric, for example, a spunbond nonwoven fabric, a meltblown fiber nonwoven fabric, a hot rolled fiber nonwoven fabric, and an SMS fiber nonwoven fabric can be used alone. A well-known fiber nonwoven fabric such as cloth, air-laid fiber nonwoven fabric, and hot air fiber nonwoven fabric, or a combination thereof. Further, the stretchable fiber nonwoven fabric is, for example, an elastomer resin formed of a polystyrene type or a polyurethane type; a thermoplastic resin formed of polyethylene, polypropylene, polyester, propylene or the like; and polyethylene/polypropylene or polyethylene. A core-sheath type or a side-by-side type composite fiber formed of polyethylene terephthalate or polypropylene/polyethylene terephthalate. Further, it is preferable that the elastic sheets 55f and 55b have a ductility ratio using the lateral direction X larger than that of the longitudinal direction Y.

The elastic sheet 55f positioned in the front waist region 12 is composed of a sheet outer edge portion 559f extending toward the lateral direction X on the side separated from the imaginary transverse center line Q, and a sheet extending toward the lateral direction X on the side close to the imaginary transverse center line Q. The inner edge portion 557f; the sheet outer edge portion 559f and the sheet inner edge portion 557f are formed in a rectangular shape at both side edge portions 55s of the sheet extending toward the longitudinal direction Y. The sheet outer edge portion 559f and the sheet inner edge portion 557f oppose the longitudinal direction Y.

The elastic sheet 55b positioned in the back waist region 13 is composed of a sheet outer edge portion 559b extending toward the lateral direction X on the side separated from the imaginary transverse center line Q, and a sheet extending toward the lateral direction X on the side close to the imaginary transverse center line Q. The inner edge portion 557b; the sheet outer edge portion 559b and the sheet inner edge portion 557b are formed in a rectangular shape at both side edge portions 55s of the sheet extending in the longitudinal direction Y. The sheet outer edge portion 559b and the sheet inner edge portion 557b oppose the longitudinal direction Y.

As an example of the elastic sheet 55, for example, as shown in Figs. 8(a) and 8(b), the urethane fibers 551 and the polyolefin fibers 552 are mixed. In addition, although FIG. 8(a) and the reference photograph are those who photograph the same photographed object, in the photographs and figures, the urethane fiber 551 is dyed red. Color, and the urethane fiber 551 and the polyolefin fiber 552 were enlarged to 50 times. The urethane fiber 551 has a stretchability in the longitudinal direction Y and the transverse direction X, and is mainly centered in the thickness direction Z. The polyolefin fiber 552 maintains strength and is preferably in the thickness direction Z on the surface side and the back side in order to make the touch feeling good. As shown in the figure, when the elastic sheet 55 is viewed from the front side or the back side, the urethane fibers 551 are present on the front side and the back side, and the polyolefin fibers 552 are present on the surface side and inside from the urethane fibers 551. Side, and polyolefin fibers 552 are mixed with urethane fibers 551.

The elastic sheet 55 shown in Figs. 8(a) and 8(b) preferably has a mass of about 25 to 60 g/m ² , more preferably 26 to 34 g/m ² , and the fibers 551 and 552 constituting the elastic sheet 55 preferably have a diameter of about 20 ~25 μm, the thickness of the fibers 551, 552 is about 2.5 to 5.0 dtex.

In another example of the elastic sheet 55, for example, as shown in FIG. 9, a nonwoven fabric 553 formed by laminating urethane fibers in a thickness direction and a sheet-like polyolefin fiber formed by two sheets are formed. Non-woven 554. More specifically, the elastic sheet 55 is formed in such a manner that two nonwoven fabrics 554 are laminated with the nonwoven fabric 553 interposed therebetween. The nonwoven fabric 553 and the nonwoven fabric 554 are joined by, for example, hot embossing.

In the front waist region 12, the non-elastic sheets 51f and 52f and the elastic sheet 55f are joined to the elastic sheet 55f which is not biased by, for example, a non-elastic sheet 51f, 52f which is not biased via a hot-melt adhesive (not shown). Further, as will be described later, the non-elastic sheets 51f and 52f which are not biased may be joined to each other by applying a pulling force between the both side edge portions 55s of the sheet via a hot-melt adhesive (not shown). The elastic sheet 55f in a state in which the size of the longitudinal direction Y in the central region 55c is smaller than the size of the longitudinal direction Y in the both side edge portions 55s of the sheet is narrowed in such a manner that the central portion 55c is narrowed.

In the back waist region 13, the non-elastic sheet 52b and the elastic sheet 55b are joined to the elastic sheet 55b which is not biased by, for example, a non-elastic sheet 52b which is not biased via a hot-melt adhesive (not shown). Further, as will be described later, the non-elastic sheet 52b which is not biased may be joined to a ratio of the longitudinal direction Y of the central portion 55c by applying a tensile force between the both side edge portions 55s of the sheet via a hot-melt adhesive (not shown). The elastic sheet 55b in a state in which the central portion 55c is deformed in a narrowed manner in a state where the longitudinal direction Y of the both side edge portions 55s of the sheet is smaller.

Further, the joining of the elastic sheet 55f and the non-elastic sheets 51f and 52f; and the joining of the elastic sheet 55b and the non-elastic sheet 52b are not limited to the hot-melt adhesive, and may be joined by ultrasonic sealing, heat sealing or the like.

The elastic sheet 55 has a rectangular shape in a natural state in which no force is applied as shown in Fig. 5(a). At this time, the size of the lateral direction X is W0, and the size of the longitudinal direction Y is L0.

On the other hand, as shown in FIG. 5(b), between the both side edge portions 55s of the lateral direction X of the elastic sheet 55, the lateral direction X (the elastic sheet 55 is applied in such a manner as to be separated from the imaginary longitudinal center line P. When the tension F is in the longitudinal direction, the position of the imaginary longitudinal center line P is smaller in the longitudinal direction Y of the at least the central portion 55c than the dimension L1 of the longitudinal direction Y in the both side edges 55s, in the center The field 55c is deformed in such a manner as to be narrowed (shrinked). Further, the dimension of the longitudinal direction Y when the tensile force F is applied between the side edge portions 55s L1 is slightly smaller than the dimension L0 of the longitudinal direction Y in the natural state.

An example of the elastic sheet 55 used in the disposable diaper 10 is shown below. In the elastic sheet 55, the dimension W0 of the lateral direction X in the natural state is 150 mm or more, and the dimension L0 of the longitudinal direction Y is 80 mm. The elastic sheet 55 is formed by mixing the urethane fibers 551 and the polyolefin fibers 552 as shown in FIG.

When the deformation of the elastic sheet 55 is measured, the pair of clamps (not shown) of the pair of the two sides of the elastic sheet 55 are attached to a pair of clamps (not shown) of a tensile tester (AG-I manufactured by Shimadzu Corporation). The distance between the initial states of the jigs is 150 mm), and by moving one of the jigs, the pair of jigs are slowly moved in the direction in which they are separated from each other.

When the distance between the pair of jigs is 200 mm, the dimension L2 of the longitudinal direction Y of the central portion 55c is 68 mm. Therefore, the size of the narrowed longitudinal direction Y is 12 mm. It is assumed that the elastic sheet 55 is applied to the disposable diaper 10 of the front waist member 20 and the back waist member 30 having a dimension X of 400 mm in the lateral direction X to estimate the distance between the above-mentioned jigs.

When the distance between the jigs is 250 mm, the dimension L2 of the longitudinal direction Y of the central portion 55c is 55 mm. Therefore, the size of the narrowed longitudinal direction Y is 25 mm. It is assumed that the elastic sheet 55 is applied to the disposable diaper 10 of the front waist member 20 and the back waist member 30 having a size X of 500 mm in the lateral direction X to estimate the distance between the above-mentioned jigs.

When the distance between the jigs is 300 mm, the dimension L2 of the longitudinal direction Y of the central portion 55c is 47 mm. Therefore, the size of the narrowed longitudinal direction Y is 33 mm. It is assumed that the elastic sheet 55 is suitable for the front waist member 20 and the back waist. The paper diaper 10 having a size X of the lateral direction X of the piece 30 was used to estimate the distance between the above-mentioned jigs.

When the distance between the jigs is 325 mm, the dimension L2 of the longitudinal direction Y of the central portion 55c is 42 mm. Therefore, the size of the narrowed longitudinal direction Y is 38 mm. It is assumed that the elastic sheet 55 is applied to the paper diaper 10 having a lateral X dimension of the front waist member 20 and the back waist member 30 of 650 mm to estimate the distance between the above-mentioned jigs.

When the dimension W0 of the elastic sheet 55 in the lateral direction X of the natural state is 150 mm, when the dimension W1 of the lateral direction X is applied to a tensile force of 325 mm, in other words, when the dimension W1 of the lateral direction X with respect to the natural state is applied to a tensile force of 2.17 times, The size of the longitudinal direction Y of the central domain 55c is changed from 80 mm to 42 mm, and the size of the longitudinal direction Y of the central domain 55c with respect to the natural state is reduced by 47.5%.

The first non-elastic sheet 51 and the second non-elastic sheet 52 are joined by a hot-melt adhesive applied to at least one of the sheets 51 and 52 over the entire area of the portion 56 opposed to each other.

In the front waist region 12, the elastic sheet 55f is attached to the main body portion 53 of the second non-elastic sheet 52f by a fixing means (not shown) such as a hot-melt adhesive or the like. In other words, the elastic sheet 55f mounts the sheet outer edge portion 559f to the second non-elastic sheet 52f by fixing means at least in the center portion 55c.

In the back waist region 13, the elastic sheet 55b is a fixing means (not shown) such as a hot-melt adhesive or the like, and the entire outer edge portion 559b of the sheet is attached to the main body portion 53 and the bent portion 54 of the second non-elastic sheet 52b. . In other words, flexibility The sheet 55b is attached to the second non-elastic sheet 52b by a fixing means at least in the center portion 55c.

In the front waist region 12, the elastic sheet 55f is attached to the non-skin direction of the underarm member 40 in the entire area where the armature member 40 is overlapped by a fixing means 801 such as a hot-melt adhesive as shown by a wavy line in FIG. surface. In other words, the elastic sheet 55f fixes at least the sheet inner edge portion 557f to the crotch member 40 by the fixing means 801. Further, the joint region 80f of the elastic sheet 55f and the underarm member 40 is formed by the fixing means 801.

In the back waist region 13, the elastic sheet 55b is placed at a position overlapping with the underarm member 40 as shown by a wavy line in Fig. 3, and the side of the inner edge portion 557b of the sheet is mounted by a fixing means 802 such as a hot-melt adhesive or the like. The skin of the underarm member 40 faces the opposite side. In other words, the elastic sheet 55b fixes at least the sheet inner edge portion 557b to the underarm member 40 by the fixing means 802. Further, the joint region 80b of the elastic sheet 55b and the underarm member 40 is formed by the fixing means 802.

The underarm member 40 is a rectangle having a longitudinal Y dimension larger than the lateral X as shown in FIG. 3, and is a front end edge 40f extending toward the lateral direction X; a rear end edge 40b extending toward the lateral direction X; The edge 40f is defined by the side edges 40s of the rear end edge 40b extending toward the longitudinal direction Y.

The underarm member 40 is provided with a liquid-absorbent structure 40A. As shown in FIGS. 3 and 4, the liquid-absorbent structure 40A includes a surface sheet 41 positioned on the opposite side of the skin, an inner sheet 42 positioned on the non-skin opposing surface side, and a surface sheet. A core material 43 that absorbs body fluid between the inner sheet 42 and the inner sheet 42.

The surface sheet 41 can cover the entire surface of the skin opposite surface of the core material 43 using a liquid permeable fibrous nonwoven fabric.

The inner sheet 42 may be made of a liquid-impermeable or liquid-impermeable fibrous nonwoven fabric or a film covering the entire surface of the non-skin side surface of the core material 43.

For the surface sheet 41 and the inner sheet 42, for example, a spunbonded nonwoven fabric or a spunbonded spunbonded (SMS) fiber nonwoven fabric, a hot air fiber nonwoven fabric, a dot adhesive fiber nonwoven fabric, or the like can be used.

The surface sheet 41 and the inner sheet 42 are extended from the both end edges 43f, 43b of the core material 43 toward the longitudinal direction Y, and the extension portions are superposed on each other and joined by a hot-melt adhesive, whereby the core material 43 is formed. The front and rear end wings 47f, 47b extending from the side edges 43s.

The surface sheet 41 and the inner sheet 42 are extended from the side edges 43s of the core material 43 toward the lateral direction X, and the extension portions are superposed on each other and joined by a hot-melt adhesive, whereby the two sides of the core material 43 are formed. The flank of the 43s is extended by 47s.

The core material 43 has a rectangular shape in which the size of the longitudinal direction Y is larger than the size of the lateral direction X, and the underarm region 14 is formed to extend in the longitudinal direction Y, for example, by the absorbent polymer particles 48 and the absorbent fibers 49. In the absorbent polymer particles 48, for example, a particle-like or fibrous form such as a starch-based, acrylic-based or amino acid-based polymer, and a water-insoluble and water-swellable polymerization having an absorption energy of at least 10 times or more of its own mass can be used. Things.

As the absorbent fiber 49, natural pulp fibers such as wood fluff pulp, recycled fibers such as crepe cotton, and the like can be used.

On both side edges 40s of the underarm member 40, in the surface sheet 41 and A plurality of leg elastic bodies 44 are disposed between the face sheets 42. The leg elastic body 44 is in the form of a fiber strip or a strip, and is disposed to extend in the longitudinal direction Y in an extended state, and is attached to at least one of the surface sheet 41 and the back sheet 42 by a hot melt adhesive (not shown).

In the crotch member 40, a pair of leakage preventing sheets 45 are provided symmetrically with respect to the imaginary longitudinal center line P. The pair of leakage preventing sheets 45 are folded back toward the side of the imaginary longitudinal center line P, respectively, and form a pair of sleeves 45a extending in the longitudinal direction Y. Inside the sleeve 45a, a plurality of strip-like or strip-shaped flanged elastic bodies 46 are attached in an elongated state. Each of the cuff elastic bodies 46 extends in the longitudinal direction Y, and is fixed to at least one of the leakage preventing sheet 45 on the skin facing surface side and the leakage preventing sheet 45 on the non-skin opposing surface side by a hot melt adhesive (not shown).

Among the front and rear end wings 47f, 47b of the crotch member 40, the front end wing 47f of the front waist region 12 is inserted into the elastic sheet 55f and the second non-elastic sheet 52 in the thickness direction Z as shown in FIG. Between the 54. The distal end flap 47f is a bent portion 54 that joins the skin facing surface of the second non-elastic sheet 52f with a hot-melt adhesive, and joins the non-skin opposing surface to the elastic sheet 55f by a hot-melt adhesive.

The rear end wing 47b of the rear waist region 13 is inserted between the elastic sheet 55b and the main body portion 53 of the second non-elastic sheet 52b in the thickness direction Z. The rear end flap 47b is joined to the elastic sheet 55b by a thermal fusion adhesive, and the non-skin opposing surface is joined to the main body portion 53 of the second non-elastic sheet 52b by a hot-melt adhesive.

In the front waist member 20, as shown in FIG. 3, the fiber extending in the lateral direction X The strip-shaped or strip-shaped front waist elastic body 60 is attached in an extended state.

The front waist elastic body 60 includes a front first waist elastic body 61 positioned on the side of the outer edge portion 201 and a front second waist elastic body 62 positioned on the side of the inner edge portion 202.

The front first waist elastic body 61 is attached between the main body portion 53 of the second non-elastic sheet 52f and the bent portion 54 in an extended state, and is applied to at least one of the main body portion 53 and the bent portion 54. The flux is fixed.

The length dimension of the lateral direction X of the second non-elastic sheet 52f is larger than the length dimension of the lateral direction X of the elastic sheet 55f, but is the length of the lateral direction X of the elastic sheet 55f by the contraction force of the front first waist elastic body 61. The dimensions are essentially the same.

The front second waist elastic body 62 is attached between the first non-elastic sheet 51f and the main body portion 53 of the second non-elastic sheet 52f in an extended state, and is applied to at least one of the sheets 51f and 52f. The agent is fixed.

The length dimension of the lateral direction X of the first non-elastic sheet 51f is larger than the length dimension of the lateral direction X of the elastic sheet 55f, but the length of the lateral direction X of the elastic sheet 55f by the contraction force of the front second waist elastic body 62. The dimensions are essentially the same.

The front waist elastic body 60 can be used with a thickness of about 470 to 780 dtex and an elongation ratio of about 2.5 to 3.0 times.

In the waist cover portion 31 of the back waist member 30, a fiber strip-like or strip-shaped back waist elastic body 70 extending in the lateral direction X is attached in an extended state.

The back waist elastic body 70 includes: the first rear side on the side of the outer edge portion 311 The waist elastic body 71 and the rear second waist elastic body 72 positioned on the side of the inner edge portion 312.

The rear first waist elastic body 71 is attached between the main body portion 53 of the second non-elastic sheet 52b and the bent portion 54 in an extended state, and is thermally welded to at least one of the main body portion 53 and the bent portion 54. The fixer is fixed.

The length dimension of the lateral direction X of the second non-elastic sheet 52b is larger than the length dimension of the lateral direction X of the elastic sheet 55b, but is the length of the lateral direction X of the elastic sheet 55b by the contraction force of the rear first waist elastic body 71. The dimensions are essentially the same.

The second waist elastic body 72 is attached between the first non-elastic sheet 51b and the main portion 53 of the second non-elastic sheet 52b in an extended state, and is heat-sealed to at least one of the sheets 51b and 52b. The agent is fixed.

The length dimension of the lateral direction X of the first non-elastic sheet 51b is larger than the length dimension of the lateral direction X of the elastic sheet 55b, but is the length of the lateral direction X of the elastic sheet 55b by the contraction force of the rear second waist elastic body 72. The dimensions are essentially the same.

The back waist elastic body 70 can have a thickness of about 470 to 780 dtex and an elongation ratio of about 2.5 to 3.0 times.

In the buttocks cover portion 32, the fiber strip-like or strip-shaped hip cover elastic body 73 extending in the lateral direction X is also attached in an extended state.

The hip cover elastic body 73 can have a thickness of about 470 to 780 dtex and an elongation ratio of about 1.5 to 2.5 times.

The second waist elastic body 62, 72 and the hip cover elastic body 73 are shown in Fig. 2 The non-existing regions 79f and 79b of the elastic body 73 indicated by × specifically, the regions 79f and 79b overlapping the core member 43 are cut in the thickness direction, and the non-existing regions 79f and 79b are provided, so that the contraction force is not effect.

In the front waist region 12, the dimension of the lateral direction X of the non-existing region 79f is smaller than the dimension of the lateral direction X of the joint region 80f.

In the back waist region 13, the size of the lateral direction X of the non-existing region 79b is smaller than the size of the lateral direction X of the joint region 80b.

According to the disposable diaper 10 of the present invention, the second waist elastic bodies 62 and 72 are not present in the regions 79f and 79b of the liquid-absorbent structure 40A, so that the liquid-absorbent structure 40A can be prevented from being in the front and rear second waist elastic bodies 62. The contraction force of 72 is contracted toward the lateral direction X.

In addition to this, the elastic sheet 55 fixes the sheet inner edge portions 557f, 557b to the crotch member 40 at least in the central portion 55c, and applies a pulling force F between the side edges 55s of the sheet, in the longitudinal direction in the central portion 55c. The size L2 of Y is deformed at least smaller than the central domain 55c in a state in which the dimension L1 of the longitudinal direction Y in the both side edges 55s of the sheet becomes smaller. Therefore, by wearing the disposable diaper 10, since the elastic sheets 55f and 55b are narrowed in the central portion 55c, the central portion of the underarm member 40 can be lifted upward by the elastic sheets 55f and 55b, and the liquid-absorbent structure can be prevented. The case where the body 40A has a weak adhesion to the skin.

In addition, since the first waist elastic bodies 61 and 71 are attached to the second non-elastic sheets 52f and 52b, the rigidity of the second non-elastic sheets 52f and 52b can be raised by the first waist elastic bodies 61 and 71. Further, since the contraction force of the elastic sheets 55f and 55b can be used to lift the center of the squat member 40 upward Therefore, it is possible to surely prevent the adhesion of the liquid-absorbent structure 40A to the skin.

Further, in the lateral direction X, since the elastic sheets 55f, 55b overlap the underarm member 40, and the size of the lateral direction X of the elastic sheets 55f, 55b fixed to the underarm member 40 is smaller than that of the second waist elastic bodies 62, 72 Since the size of the lateral direction X of the regions 79f and 79b is larger, the armpit member 40 can be pressed against the skin by the contraction force of the elastic sheets 55f and 55b even in the absence of the regions 79f and 79b.

Further, the waist members 20 and 30 include substantially non-elastic non-elastic sheets 52f and 52b at least in the lateral direction X. Since the first waist elastic members 61 and 71 are disposed on the non-elastic sheets 52f and 52b, the first waist elastic members 61 and 71 are disposed. The presence of the waist elastics 61, 71 enhances the rigidity of the non-elastic sheets 52f, 52b. Further, since at least the central portion 55c of the sheet outer edge portion 559 of the elastic sheets 55f, 55b is also fixed to the aforementioned non-elastic sheets 52f, 52b, when the elastic sheets 55f, 55b are deformed, the underarm members can be further made The central domain of 40 is lifted in a separate manner from the imaginary transverse centerline Q.

In addition, since the elastic sheets 55f and 55b formed of the stretchable fiber nonwoven fabric are disposed on the front and rear waist members 30 and 30, even if the elongational forces of the front and rear waist elastic bodies 60 and 70 are relatively small, the front and rear waist regions are provided. 13, 14 can also impart the desired fit. Therefore, the front and rear waist elastic bodies 60, 70 formed of the elastic strips of strips or strips can reduce the risk of localized pressure marks adhering to the skin.

Further, in the so-called three-member type paper diaper formed of the front waist member, the back waist member, and the underarm member, only the underarm member 40 is oriented in the armpit field 14 In the Y stretcher, when the excrement such as urine is excreted, the crotch member 40 is easily separated from the skin. However, according to the deformation of the elastic sheets 55f and 55b, the disposable diaper 10 can excrete excrement. The situation in which the underarm member 40 is separated from the skin is suppressed.

Moreover, the elastic sheet 55 was subjected to a force such as the one shown below to cause elongation, and an experiment for measuring the contraction force in the state in which the elongation was performed was performed. In this experiment, in the natural state where no force is applied, the dimension of the longitudinal direction Y is 50 mm, and the elastic sheet 55 having the lateral X dimension of 100 mm is elongated by the X stretching in the lateral direction so that the size of the lateral direction X becomes 200 mm (in other words, the lateral direction) After the size of X is doubled, the size of the lateral X is restored to 100 mm by slowly eliminating the force. The results of the experiment in which the cycle was repeated are shown in the upper column of Table 1 and FIG. Further, the solid line in FIG. 10 indicates the first period, and the broken line indicates the second period. Further, the numerical values in Table 1 are the magnitudes of the contraction force (unit N) of the elastic sheet having a length of the lateral direction X of 50 mm in each state under each condition. Further, as shown in Fig. 8, the elastic sheet 55 is formed by mixing urethane fibers 551 and polyolefin fibers 552, and the content of the urethane fibers 551 is 47%, and the length in the thickness direction is 0.98 mm. The mass is 32.58 g/m ² .

In this experiment, the contraction force applied to the lateral direction X in the state in which the elastic sheet 55 having the lateral X dimension of 100 mm is stretched in the lateral direction X is the same as when the disposable diaper 10 is worn, or when the disposable diaper 10 is worn, The force required to enlarge the waist opening 15 is the same. On the other hand, after the elastic sheet 55 is stretched twice in the lateral direction X, the contraction force in the lateral direction X in a state in which the force is gradually removed is equivalent to being applied to the wearer's body when the disposable diaper 10 is worn. force.

Further, a non-woven fabric having the same size of the longitudinal direction Y and the size of the lateral direction X as the elastic sheet 55 in a state where no force is applied is prepared. In the nonwoven fabric, a sample nonwoven fabric in which the silk rubber extending in the lateral direction X is attached at equal intervals in the longitudinal direction Y is prepared, and in the second period of the cycle, a force of twice the length is applied from the state where no force is applied to the lateral direction X. The contraction force almost the same as the contraction force generated in the elastic sheet 55 was generated, and the results of the experiment of the same cycle as the above-described repetition are shown in the lower column of Table 1 and FIG. The silk rubber is a polyurethane elastic fiber formed by a dry spinning method, and 11 strips of 470 dtex of urethane elastic fibers are disposed at intervals of 4 mm in the sample nonwoven fabric. The thickness direction Z of the sample nonwoven fabric was about 2.5 mm in length and the mass was about 70 g/m ² . Further, the solid line in Fig. 11 indicates the first period, and the broken line indicates the second period.

In Table 1, "1st" indicates the first time of the above cycle, and "2nd" indicates the second time of the above cycle. Further, "go" indicates that the elastic sheet 35 which is not biased is stretched in the lateral direction X, and the dimension of the lateral direction X is extended to 200 mm, and the contraction force applied in the lateral direction X is applied. Further, "back" means that the size of the lateral X is returned to the force of the elastic sheet 55 which is elongated to 200 mm in the lateral direction X by slowly eliminating On the way of 100 mm, the contraction force applied in the lateral direction X. In addition, "%" indicates the ratio of the length dimension of the elastic sheet 55 and the lateral direction X in which the sample nonwoven fabric is stretched when the contraction force is measured with respect to the dimension of the lateral direction X of 100 mm. Therefore, % in Table 1 corresponds to the elongation mm of the horizontal axis in FIGS. 10 and 11.

As shown in Table 1, in the second cycle, the elastic sheet 55 in a state in which the lateral direction X is twice doubled is contracted to 75%, and the contraction force of the elastic sheet 55 is 1.01 N, whereas the sample is not woven. The contraction force was 1.71 N. In other words, the contraction force of the sample non-woven fabric is about 1.7 times the contraction force of the elastic sheet 55.

Further, in the second cycle, when the elastic sheet 55 in a state in which the lateral direction X is extended twice is contracted to 50%, the contraction force of the elastic sheet 55 is 0.47 N, and the contraction force with respect to the sample nonwoven fabric is 1.22 N. . In other words, the contraction force of the sample non-woven fabric is about 2.6 times that of the elastic sheet 55.

As described above, when contracting from the stretched state, the contraction force of the elastic sheet 55 is the same as that of the sample non-woven fabric when the second period is 100%, but the force applied to the sample nonwoven fabric and the elastic sheet 55 becomes small. In the near-natural state, the contraction force applied to the elastic sheet 55 becomes smaller than the contraction force applied to the sample nonwoven fabric. In other words, the contraction force at the time of wearing the disposable diaper 10 is substantially the same as that of the elastic sheet, and the sample nonwoven fabric, when contracted from the stretched state, that is, the elastic sheet 55 in the state in which the disposable diaper 10 is worn. The contraction force is smaller than this for the sample non-woven. The elastic sheet 55 is in a natural state from which no force is applied. The contraction force when returning to the state of 50% contraction from the state in which the lateral length X length is extended to twice is 0.05 to 0.5 N, more preferably 0.10 to 0.35 N, and therefore, it can be pressed at a moderate contraction force. The wearer's skin can prevent the elastic sheet 55 from getting caught in the wearer's skin.

Further, the non-woven fabric 553 formed of the flaky urethane fibers and the non-woven fabric 554 formed of the two sheet-like polyolefin fibers are laminated in the thickness direction to form the elastic sheet 55 shown in FIG. The contraction force was measured under the same conditions as above, and the results are shown in Table 2.

Since the elastic sheet 55 is also in the same state as described above, the contraction force when returning from the length dimension to the lateral direction X to the state of 50% shrinkage is 0.05 to 0.5 N, more preferably 0.10 to 0.35 N, so The moderate contraction force is pressed against the wearer's skin, and the elastic sheet 55 can be prevented from getting into the wearer's skin.

The experiment described below was carried out on the elastic sheet 55 and the sample nonwoven fabric described above.

The elastic sheet 55 and the sample non-woven fabric have a longitudinal length of 20 mm and a lateral X length of 25 mm in a state where no force is applied. The elastic sheets 55 and the sample nonwoven fabric were attached to the larger mounting plate of the length of the lateral direction X and the length of the longitudinal direction Y than the elastic sheets 55 and the sample nonwoven fabric, and the hardness of the edge portions of the sheets of the elastic sheet 55 and the sample nonwoven fabric was measured. In addition, The elastic sheet 55 and the sample non-woven fabric are attached to the mounting board in such a manner that the longitudinal end portion of the mounting plate coincides with the longitudinal sheet edge portion of the elastic sheet 55 and the sample nonwoven fabric. Further, a recess for mounting the elastic sheet 55 and the sample nonwoven fabric is formed on the mounting plate. The recessed portion is composed of a first recessed portion that extends in the lateral direction and a pair of second recessed portions that extend in the longitudinal direction from both end portions of the first recessed portion. The first recessed portion is formed at a position separated from the end portion of the mounting plate by 8 mm from the end portion of the mounting plate and the edge portion of the sheet of the elastic sheet 55 and the sample nonwoven fabric. The pair of second recesses are separated by a distance of 17 mm from each other at the mounting plates. The elastic sheet 55 and the sample nonwoven fabric are fixed by tapes in the first concave portion and the second concave portion.

The hardness of the edge portion of the sheet of the elastic sheet 55 and the sample non-woven fabric was measured using a digital dynamometer (manufactured by Nippon Denshoku Co., Ltd.: SHIMPO FGP-0.2). The hardness measuring device has a cylindrical detecting portion 81 having a diameter of 6 mm as shown in FIG. 12, and the distal end side of the detecting portion 81 has two first contact portions 81a and a second contact from the proximal end side toward the distal end side. In the portion 81b, the sample nonwoven fabric and the elastic sheet 55 are brought into contact with one end portion of the other end portion. Further, the hardness measuring device was pressed against the edge portions of the elastic sheets 55 and the sample nonwoven fabric at a speed of 100 m/min to measure the hardness of the edge portions of the sheets of the elastic sheets 55 and the sample nonwoven fabric.

Table 3 shows the results of measuring the hardness of the edge portions of the elastic sheet 55 and the sheet non-woven fabric by the above-described hardness measuring device.

As shown in Table 3, the edge portion of the sheet of the elastic sheet 55 was softer by about 30% on the average value than the end portion of the sample non-woven fabric.

As described above, since the end portion of the elastic sheet 55 is softer than the end portion of the sample non-woven fabric, the wearing feeling can be improved.

However, in the disposable diaper 10 of the present invention, an example of the elastic sheet 55 used for fixing the back waist member 30 of the crotch member 40 will be described below with reference to FIGS. 6 and 4. In the elastic sheet 55, the dimension W0 of the lateral direction X in the natural state is 150 mm or more, and the dimension L0 of the longitudinal direction Y is 80 mm. Further, the elastic sheet 55 is joined to the non-elastic sheets 51 and 52 and the underarm member 40 in the same manner as the disposable diaper 10.

Further, in Table 4, when the waist outer edge portion 311 which is the farthest from the virtual transverse center line Q of the back waist member 30 in the natural state is used as the reference line L9, A, B, C, D, and E represent the reference line L9. The distance mm from the specific portion of the disposable diaper 10 to be described later when the tensile force F is applied.

Regarding A, in the natural state of the disposable diaper 10, the mark a is indicated at the outer edge portion 559 of the elastic sheet 55. Next, when the pulling force F is applied to the disposable diaper 10 and the pair of jigs 91 are opposed to each other, the distance mm from the reference line L9 to the mark a is A.

Regarding B, in the natural state of the disposable diaper 10, in the longitudinal direction Y of the sheet outer edge portion 559 of the elastic sheet 55 and the elastic sheet bisector 55m The middle position is marked with a mark b. Next, when the pulling force F is applied to the disposable diaper 10 and the pair of jigs 91 are opposed to each other, the distance mm from the reference line L9 to the mark b is B.

Regarding C, in the natural state of the disposable diaper 10, the mark c is indicated at a position where the size of the longitudinal direction Y of the elastic sheet 55 is divided into two equally divided elastic lamellae 55m. Next, when the pulling force F is applied to the disposable diaper 10 and the pair of jigs 91 are opposed to each other, the distance mm from the reference line L9 to the mark c is C.

Regarding D, in the natural state of the disposable diaper 10, the mark d is indicated at the intermediate position between the inner edge portion 557 of the elastic sheet 55 and the longitudinal direction Y of the bisector 55m of the elastic sheet, and then the pulling force F is applied to the disposable diaper 10. When the pair of jigs 91 are opposed to each other, the distance mm from the reference line L9 to the mark d is D.

Regarding E, in the natural state of the disposable diaper 10, the inner edge portion 557 of the elastic sheet 55 on the side close to the imaginary transverse center line Q of the elastic sheet 55 is marked with a mark e. Next, when the pulling force F is applied to the disposable diaper 10 and the pair of jigs 91 are opposed to each other, the distance mm from the reference line L9 to the mark e is E.

The relationship between the opposing distance between the pair of jigs 91 and A to E is as shown in Table 4. Further, the leftmost column in Table 4 indicates the opposing distance mm between the pair of jigs 91.

As shown in Table 4, the outer edge portion 559 of the sheet of the elastic sheet 55 is changed little, and the sheet edge portion 557 of the sheet which is closer to the elastic sheet 55 is changed more.

Further, it is to be noted that only the stretchable fiber nonwoven fabric is used for the elastic sheets 55f and 55b described above. However, the elastic sheet of the invention is not limited to the above. For example, an elastic sheet which is formed by laminating a stretchable fiber nonwoven fabric in a thickness direction and a substantially non-stretchable fiber nonwoven fabric can be used.

In the tensile tester described above, the elastic sheet was changed to a size of 50 mm in the longitudinal direction of the elastic sheet, and other conditions were carried out under the same conditions.

When the opposing distance between the pair of jigs is 200 mm, the dimension of the longitudinal direction Y of the central region is 49 mm. Further, on the inner edge side of the sheet in the center region, the inner side was narrowed by 1 mm, and the outer edge side of the sheet was not changed.

When the opposing distance between the pair of jigs is 250 mm, the dimension of the longitudinal direction Y of the central region is 47 mm. Further, on the inner edge side of the sheet of the center region, the inner side was narrowed by 3 mm, and the outer edge side of the sheet was not changed.

When the opposing distance between the pair of jigs is 300 mm, the dimension of the longitudinal direction Y of the central region is 43 mm. Further, on the inner edge side of the sheet of the central region, the inner side is narrowed by 4 mm, and on the other hand, the outer side edge of the sheet is narrowed toward the inner side. 3mm.

When the opposing distance between the pair of jigs is 325 mm, the dimension of the longitudinal direction Y of the central region is 39 mm. Further, on the inner edge side of the sheet in the center region, the inner side was narrowed by 6 mm, and on the other hand, the outer edge side of the sheet was narrowed by 5 mm inward.

Further, in the above-described embodiment, the non-elastic sheets 52f and 52b are attached to the non-skin opposing surfaces of the elastic sheets 55f and 55b, but the present invention is not limited thereto. For example, the non-elastic sheet may be attached to the skin facing surface of the elastic sheets 55f and 55b. However, if the non-elastic sheets 52f and 52b are attached to the non-skin opposing surfaces of the elastic sheets 55f and 55b, the wearing state of the elastic sheets 55f and 55b can prevent the sheet inner edge portion 557 and the sheet outer edge portion of the elastic sheets 55f and 55b. Since the 559 is exposed to the outside, the elastic sheets 55f and 55b can be prevented from peeling off.

In addition to the materials described in the specification of the present invention, the constituent members of the disposable disposable diaper 10 of the present invention may not be limited to various conventional materials which are generally used. Further, in the specification of the invention and the scope of the Japanese Patent Application, the terms "first" and "second" are used only to distinguish the same elements, positions, and the like.

A modification of the disposable diaper 100 of the present invention is shown in Fig. 7 . Since the basic configuration of the disposable diaper 100 shown in FIG. 7 is the same as that of the above-described disposable diaper 10, only the differences will be described below.

In the disposable diaper 10, the elastic sheet 55 and the second non-elastic sheet 52 are, for example, coated with a hot-melt adhesive agent applied to the entire portion of the opposing portion. Line bonding. On the other hand, in the disposable diaper 100, a hot-melt adhesive 805 is applied to the position indicated by the wavy line, and the elastic sheet 55 and the second non-elastic sheet 52 are joined. Specifically, the sheet edge portions 55s of the elastic sheets 55f and 55b are joined, and the both side edge portions 52s of the second non-elastic sheet 52 are joined to the sheet outer edge portions 559f and 559b of the elastic sheets 55f and 55b. The body portion 53 of the non-elastic sheet 52 is not joined to the elastic sheet 55 and the non-elastic sheet 52.

Thus, if the elastic sheet 55 and the non-elastic sheet 52 are joined, the narrowing of the central region 55c of the elastic sheet 55 when the tensile force is applied can be narrowed compared to the global joint of the opposing portion at the above-mentioned opposite portion. It is larger, so the lower member 40 can be lifted further upward.

Regarding the disclosure of the invention described above, at least the following matters can be summarized.

The disposable diaper 10 has a lateral direction X and a longitudinal direction Y which are orthogonal to each other, and a skin facing surface and a non-skin facing surface, and has a front waist region 12 and a back waist region 13 which face each other on the opposite side of the skin. The underarm region 14 between the front waist region 12 and the back waist region 13 in the longitudinal Y position; the waist members 20, 30 disposed in the front waist region 12 and the back waist region 13; and disposed under the armpit field 14 The member 40; the liquid-absorbent structure 40A provided in the crotch member 40; and the waist elastic bodies 60, 70 extending in the lateral direction X of the waist members 20, 30. The waist members 20, 30 have outer end edges 201, 311 and inner end edges 202, 312 that face the longitudinal direction Y, and elastic sheets 55f, 55b that include stretchability at least in the lateral direction X. The waist elastic bodies 60 and 70 include first waist elastic bodies 61 and 71 disposed on the side of the outer edge portions 201 and 311 of the waist members 20 and 30, and The second waist elastic bodies 62 and 72 are disposed on the side of the inner end edges 202 and 312 of the waist members 20 and 30. The second waist elastic bodies 62 and 72 do not exist in the regions 79f and 79b of the liquid-absorbent structure. The elastic sheet has: two side edges 55s of the sheet in the lateral direction X; and an outer edge portion 559 and an inner edge portion 557 of the sheet opposite to the longitudinal direction Y, at least in the central portion 55c, the inner edge portion 557 of the sheet is fixed at In the crotch member 40, when the pulling force F is applied between the side edge portions 55s of the sheet, the size of the longitudinal direction Y in the central portion 55c is smaller than the size of the longitudinal direction Y in the both side edges 55s of the sheet. At least the central domain 55c is narrowed and deformed.

The invention disclosed in the above paragraphs can at least include the following embodiments.

(1) The waist members 20 and 30 include substantially non-elastic non-elastic sheets 52f and 52b in the lateral direction X, and the first waist elastic bodies 61 and 71 and the elastic sheets 55f and 55b are disposed on the non-elastic sheets 52f and 52b. At least the central region 55c of the outer edge portion 559 of the sheet is fixed to the non-elastic sheets 52f, 52b.

(2) The elastic sheets 55f and 55b overlap the crotch member 40, and the lateral X of the elastic sheets 55f and 55b attached to the crotch member 40 has a lateral dimension smaller than that of the regions 79f and 79b where the second lumbar elastic bodies 62 and 72 are not present. The size of X is larger.

(3) The contraction force of the elastic sheets 55f and 55b in the lateral direction X is smaller than the contraction force of the lateral X of the first waist elastic body.

(4) The liquid-absorbent structure 40A includes: a liquid-permeable surface sheet 41 positioned on the opposite surface side of the skin; and an inner sheet 42 positioned on the non-skin opposing surface side; And a core material 43 that absorbs excrement between the surface sheet 41 and the inner sheet 42 and has front and rear end fins 47f, 47b formed by the surface sheet 41 and the inner sheet 42 at both end edges of the longitudinal direction Y, elastic The sheets 55f and 55b are disposed in the front waist region 12 and the back waist region 13 so as to extend across the both end edges of the front and rear end wings 47f and 47b in the longitudinal direction Y of the liquid-absorbent structure 40A.

(5) The elastic sheets 55f, 55b have a larger elongation in the transverse direction X than in the longitudinal direction Y.

(6) The elastic sheets 55f, 55b cover the front end edge 40f and the rear end edge 40b in the longitudinal direction Y of the crotch member 40, and return to the state after the contraction from the state in which the natural state is not applied to the lateral direction X twice. The contraction force is 0.05~0.50N.

10‧‧‧Disposable disposable diapers (disposable wearing items after use)

11‧‧‧Waist members

12‧‧‧ Front waist

13‧‧‧Back waist domain

14‧‧‧胯下域

20‧‧‧ Front waist members

30‧‧‧Back waist member

40‧‧‧Underlying components

40A‧‧‧liquid-absorbing structures

40f‧‧‧ front edge

40b‧‧‧back edge

50‧‧‧Non-elastic sheets

51‧‧‧1st non-elastic sheet

51f‧‧‧1st non-elastic sheet

51b‧‧‧1st non-elastic sheet

52‧‧‧2nd non-elastic sheet

52f‧‧‧2nd non-elastic sheet

52b‧‧‧2nd non-elastic sheet

55‧‧‧elastic sheets

55f‧‧‧elastic sheet

55b‧‧‧elastic sheet

55c‧‧‧Central Domain

55s‧‧‧ Both sides of the sheet

60‧‧‧Front waist elastomer

61‧‧‧First 1st waist elastic body (1st waist elastic body)

62‧‧‧Pre-2nd waist elastic body (2nd waist elastic body)

70‧‧‧Back waist elastic

71‧‧‧1st waist elastic body (1st waist elastic body)

The second waist elastic body (the second waist elastic body) after 72‧‧

79f‧‧‧No area exists

79b‧‧‧No area exists

557‧‧‧Sheet outer edge

557f‧‧‧Sheet outer edge

557b‧‧‧Sheet outer edge

559‧‧‧The inner edge of the sheet

559f‧‧‧The inner edge of the sheet

559b‧‧‧The inner edge of the sheet

X‧‧‧ Landscape

Y‧‧‧ portrait

Fig. 1 is a perspective view of a disposable disposable diaper as an example of the disposable wearing article of the present invention.

[Fig. 2] A broken view of a part of the disposable diaper.

Fig. 3 is a view similar to Fig. 2 in which a part of the underarm member is broken.

Fig. 4 is an enlarged cross-sectional view taken along line IV-IV of Fig. 2;

[Fig. 5] is an explanatory view showing an elastic sheet, (a) is an explanatory view showing a state in which no tensile force is applied, and (b) is an explanatory view showing a state in which tension is applied to each other in the lateral direction.

Fig. 6 is an explanatory view showing deformation of a back waist member of a disposable diaper.

Fig. 7 is a view similar to Fig. 3 showing a modification of the disposable diaper.

Fig. 8 is a plan view showing an example of the elastic sheet (a). (b) A cross-sectional view taken along line VIIIb-VIIIb of Fig. 8.

Fig. 9 is a cross-sectional view showing another example of the elastic sheet.

Fig. 10 is a view showing the relationship between the extension in the lateral direction X and the contraction force when the elastic sheet is stretched in the lateral direction X.

Fig. 11 is a view showing the relationship between the stretching in the lateral direction X and the contraction force when the sample non-woven fabric is stretched in the lateral direction X.

Fig. 12 is a side view showing a detecting portion of a device for measuring the hardness of an elastic sheet and a sample nonwoven fabric.

13‧‧‧Back waist domain

14‧‧‧胯下域

12‧‧‧ Front waist

30‧‧‧Back waist member

311‧‧‧Outer edge

31‧‧‧Waist cover

80b‧‧‧ joint area

43b‧‧‧ edge

40b‧‧‧back edge

47b‧‧‧Back edge

53‧‧‧ Body Department

54‧‧‧Bends

52‧‧‧2nd non-elastic sheet

71‧‧‧1st waist elastic body

72‧‧‧1st waist elastic body

70‧‧‧Waist Elastomer

55b‧‧‧elastic sheet

55‧‧‧elastic sheets

55s‧‧‧ Both sides of the sheet

51‧‧‧1st non-elastic sheet

43s‧‧‧ both sides

32‧‧‧Hip cover

73‧‧‧Hip cover elastic body

47s‧‧‧Flanking

43‧‧‧ core material

40s‧‧‧lateral edge

42‧‧‧ inside sheet

44‧‧‧ leg elastomer

41‧‧‧Surface

45‧‧‧ leakproof sheet

557f‧‧‧Sheet outer edge

55f‧‧‧elastic sheet

62‧‧‧1st waist elastic body

61‧‧‧1st waist elastic body

60‧‧‧ waist elastic

40f‧‧‧ front edge

47f‧‧‧ front wing

43f‧‧‧ Both ends

80f‧‧‧ joint area

201‧‧‧Outer edge

20‧‧‧ Front waist members

202‧‧‧ Inner edge

40‧‧‧Underlying components

312‧‧‧ Inner edge

801‧‧‧Fixed means

48‧‧‧Absorbing polymer particles

49‧‧‧Absorbent fiber

46‧‧‧Flanged Elastomer

45a‧‧‧Sleeve

802‧‧‧Fixed means

557b‧‧‧The inner edge of the sheet

40A‧‧‧liquid-absorbing structures

Claims (7)

A disposable wearing article having transverse and longitudinal directions orthogonal to each other; and a skin facing surface and a non-skin facing surface, and having a front waist region opposite to each other on the opposite side of the skin And a back waist region; a lower armrest region between the front waist region and the rear waist region; a waist member disposed in the front waist region and the back waist region; and disposed under the armpit region a member; a liquid-absorbent structure provided on the underarm member; and a disposable wearing article after the waist member extends in the lateral direction of the waist elastic body, wherein the waist member has an opposite direction a longitudinal end edge portion and an inner end edge portion, and at least the transverse direction includes a stretchable elastic sheet, wherein the waist elastic body includes: a first waist elastic body disposed on a side of an outer edge portion of the waist member; a second waist elastic body disposed on a side of the inner edge portion of the waist member, wherein the second waist elastic body is not present in a region of the liquid-absorbent structure, and the elastic sheet has both sides of the lateral sheet Department; with the opposite direction a sheet outer edge portion and a sheet inner edge portion, and at least the inner end portion of the sheet inner end portion is fixed to the crotch member, and when a tensile force is applied between the both side edges of the sheet, in the central domain In the aspect in which the longitudinal dimension is smaller than the dimension of the longitudinal direction in the both side edges of the sheet, at least the central region is narrowed and deformed. The disposable wearing article according to the first aspect of the invention, wherein the waist member comprises substantially non-extension at least in the lateral direction. In the non-elastic sheet, the first waist elastic body is disposed on the non-elastic sheet, and at least the central portion of the outer edge portion of the sheet of the elastic sheet is fixed to the non-elastic sheet. The disposable wearing article according to the first or second aspect of the invention, wherein the elastic sheet overlaps the crotch member, and the lateral dimension ratio of the elastic sheet attached to the crotch member is The aforementioned lateral dimension of the region where the second waist elastic body does not exist is larger. The disposable wearing article according to the second aspect of the invention, wherein the elastic sheet has a contraction force in the lateral direction that is smaller than a contraction force of the first waist elastic body in the lateral direction. The disposable wearing article according to any one of claims 1 to 2, wherein the liquid-absorbent structure is provided with liquid permeability on the opposite side of the skin. a surface sheet; an inner sheet positioned on the non-skin facing side; and a core material interposed between the surface sheet and the inner sheet to absorb excrement, and having the surface sheet at both end edges in the longitudinal direction The front and rear wings formed on the inner sheet are disposed in the front waist region and the rear waist region so as to extend over both end edges of the front and rear wings in the longitudinal direction of the liquid-absorbent structure. The disposable wearing article according to any one of claims 1 to 2, wherein the elastic sheet is in the lateral direction The elongation is greater than the elongation in the aforementioned longitudinal direction. The disposable wearing article according to any one of claims 1 to 2, wherein the elastic sheet covers a front end portion and a rear end portion of the crotch member in the longitudinal direction. The contraction force when the natural state without the force is applied to the state in which the lateral direction is extended twice to return to the contracted state is 0.05 to 0.50 N.