TW201325570A - Disposable wearing article - Google Patents

Abstract

To provide a disposable article capable of suppressing degradation of wearing feeling and generation of leakage when absorbing body fluid while securing absorbability. A disposable wearing article 1 includes an absorber having a urinating region S3 to be in contact with a urinating portion of the wearer, a rear body-surrounding region S2 to be in contact with buttocks of the wearer, and an absorbent sheet 90 which has absorbent polymer sandwiched between liquid-permeable sheets. The absorbent sheet is arranged in the rear body-surrounding region, but not in the urinating region. The absorber positioned at the urinating region has a center opening part 45 which extends from the urinating region towards the rear body-surrounding region. The rear body-surrounding region has a front leg-surrounding elastic material 5F and a rear leg-surrounding elastic material 5R extending at least in fore and aft direction of the fore and aft direction and a width direction.

Description

Disposable wearing items

The present invention relates to a disposable wearing article having an absorbent polymer for absorbing body fluids.

A disposable wearing article such as a pants-type diaper, which has been required to have high absorption performance in recent years, is provided with a disposable wearing article having an absorbent polymer for absorbing body fluid. For example, Patent Document 1 describes a disposable wearing article having a superabsorbent material as an absorbent polymer.

The disposable wearing article has an inner sheet and an absorbent structure disposed on the inner sheet. The absorbent structure includes an absorbent layer including a front end portion and a rear end portion, and a surge layer disposed on the absorbent layer. An absorbent sheet is laminated on the front end portion of the absorbent layer, and a front absorbent region in which the absorbent layer and the absorbent sheet are laminated to form a thick wall is formed at the front end portion of the absorbent structure. The absorbent layer and the absorbent sheet constituting the front absorbent region comprise the above-mentioned superabsorbent material. According to the disposable wearing article according to the above configuration, a large amount of superabsorbent material is disposed in the front absorbent region in front of the wearer to ensure absorption performance, and can be absorbed in the front absorbent region. Body fluids excreted by the wearer.

[Patent Document]

[Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 8-66426 (Fig. 3, Figure 5, paragraphs 0011, 0015, 0016, etc.)

However, the above-mentioned conventional disposable wearing article has the following problems.

It is provided with a large amount of superabsorbent material in the front absorbent region, whereby the front absorbent region absorbs the body fluid intensively. Therefore, there is a tendency to absorb body fluids, and only the front absorbent region partially becomes heavy, and only the front absorbent region slides down. Therefore, a gap is formed between the front absorbent region and the body, which may cause a horizontal leak or a deterioration in the wearing feeling due to a decrease in fit.

Accordingly, an object of the present invention is to provide a disposable wearing article which can ensure the absorption performance and can suppress the deterioration of the wearing feeling when the body fluid is absorbed or the leakage.

The disposable wearing article (disposable disposable diaper 1) of the present invention is provided with a liquid permeable surface sheet (surface sheet 10), a back sheet (absorbent inside coated sheet 30), and a configuration An absorber (absorbent body 40) between the front surface sheet and the inner sheet having a front-rear direction extending toward the front side and the rear side of the wearer and a width direction orthogonal to the front-rear direction, and having an abutment The urination area (the urination area S3) in the region of the wearer's urination area and the arrangement in the urination area The buttock region (the rear waistline region S2) of the region of the buttocks of the wearer is rearward and is provided with an absorbent sheet (absorbent sheet 90) which absorbs between the surface sheet and the inner sheet The polymer is sandwiched between the liquid-permeable sheets, wherein the absorbent sheet is not disposed in the urination region, and the absorbent sheet is disposed in the buttock region, and is located in the urination region and the hip region. At least the absorbing body of the urination region is provided with a guiding portion (a central opening portion 45 and a first side slit 46) extending from the urination region toward the buttock region, and the hip region is provided in the front-rear direction The buttocks stretchable member (the front leg elastic material 5F and the rear leg elastic material 5R) that expands and contracts in at least the front-rear direction in the width direction.

Further, the disposable wearing article (disposable disposable diaper 1) of the present invention is provided with a liquid permeable surface sheet (surface sheet 10) and a back sheet (absorbent inner covering sheet 30); And an absorber (absorbent body 40) disposed between the surface sheet and the inner sheet and having a front-rear direction extending toward a front side and a rear side of the wearer and a width direction orthogonal to the front-rear direction, and having a urination region (the urination region S3) that is in contact with the urination portion of the wearer; and a hip region (the rear waist region S2) disposed in a region that is rearward of the urination region and abuts against the wearer's buttocks The disposable wearing article, wherein the absorbent system includes a first region having an absorbent polymer; and a second region having a lower basis weight of the absorbent polymer than the first region, The absorber in the region is provided with the first region, and the absorber in the urination region is provided with the second region, and is located in the urination region. The absorber in the at least the urination region of the region and the buttock region is provided with a guide portion (the central opening portion 45 and the first side slit 46) extending from the urination region toward the buttock region, and is provided in the buttock region The buttocks stretchable member (forefoot elastic material 5F, rear foot elastic material 5R) that expands and contracts in at least the front-rear direction in the front-rear direction and the width direction.

According to the disposable wearing article according to the present invention, since the guide portion extending from the urination region toward the buttock region is formed, the body fluid absorbed by the urination region can be smoothly guided to the hip region. Sex sheets. By guiding the body fluid from the urination region to the buttock region, the absorbed body fluid is not only the absorbent body of the urination region, but also the absorbent sheet disposed in the buttock region and the absorbent polymer in the first region. Therefore, the absorption area can be ensured and the absorption performance can be ensured. Therefore, the absorption capacity can be effectively used, and the absorption capacity of the entire absorbent article can be improved.

Further, when the discharged urine is concentratedly held in the lower part of the crotch, the absorbent body expands in the crotch portion and the foot becomes difficult to close, causing discomfort or difficulty in walking. However, by inducing the urine to the absorbent sheet at a position away from the urination area and maintaining it intensively, it is possible to reduce the increase in the thickness of the absorbent body due to the expansion of the absorbent polymer after the urine is absorbed in the lower part of the sputum. Comfort, which increases absorption efficiency and reduces leakage.

Further, since the buttocks stretchable member that expands and contracts at least in the front-rear direction is provided in the buttock region, even if the body fluid is absorbed by the absorbent polymer, When the hip area becomes heavier, it can also be lifted by the buttocks of the buttocks.

Next, an embodiment of the disposable disposable diaper 1 of the present invention will be described with reference to the drawings. In the following description, the same or similar reference numerals are given to the same or similar parts. However, the figure is a schematic, and it should be noted that the ratio of each size is different from the actual object. Therefore, the specific dimensions and the like should be judged based on the following description. Further, it also includes portions in which the dimensional relationships and ratios of the drawings are different from each other.

The disposable wearing article of the present embodiment is characterized in that the region where the basis weight of the absorbent polymer for absorbing the body fluid is high is provided in the buttock region.

(1) The overall schematic structure of the disposable wearing article

Fig. 1 is a schematic perspective view of the disposable disposable diaper 1 after the disposable wearing article is constructed in the present embodiment. Fig. 2 is a developed plan view of the disposable disposable diaper 1 of the present embodiment. Fig. 3 is a cross-sectional view in the width direction of the disposable diaper 1 taken along the line X1-X'1 shown in Fig. 2 . Fig. 4 is a cross-sectional view of the disposable diaper 1 taken along the line X2-X'2 shown in Fig. 2 in the front-rear direction. Fig. 5 is a cross-sectional view in the width direction of the disposable diaper 1 taken along the line X3-X'3 shown in Fig. 2. The disposable disposable diaper 1 is a disposable diaper for a shorts type.

The disposable disposable diaper 1 is a front waistline region corresponding to the wearer's front waistline in the front-rear direction of the absorbent article 1 as shown in FIG. S1; a rear waistline region S2 corresponding to the wearer's rear waistline; and a urination region S3 corresponding to the wearer's armpit and abutting the wearer's urination region. The urination area S3 is a region including the center near the front side in the front-rear direction of the absorber, and the rear waistline region S2 is a region further rearward than the center in the front-rear direction of the absorber, and is disposed closer to the urination region S3 and abuts The hip area of the wearer's buttocks area.

In the case of a rectangular absorbent body, it is desirable to color the absorbent sheet in order to easily grasp the front and rear of the absorbent body, or to indicate the front and back marks such as the back sheet and the offset preventing tape so as to easily recognize the front-rear direction. Especially in gasket type diapers is extremely desirable.

By joining the waist-rim edge portion 6 of the outer side in the width direction W of the waist-rim portion 4 and the back waistline region S2 before the outer side in the width direction W of the absorbent article 1 in the front waistline region S1, and the front waist-rim portion 4' and rear The waist edge portion 6' is joined, and the disposable disposable diaper 1 is formed into a pants type.

The disposable disposable diaper 1 includes a surface sheet 10, an absorber 40, a side sheet 60, a front outer top sheet 70F, a rear outer top sheet 70R, an outer sheet 100, and a front outer surface. The sheet 80F and the rear exterior back sheet 80R are joined to each other by an adhesive, heat welding or the like.

The front exterior topsheet 70F, the rear exterior topsheet 70R, the front exterior backsheet 80F, the rear exterior backsheet 80R, and the exterior intermediate sheet 100 are external to the disposable disposable diaper 1 Load a part of the sheet. The front side outer top sheet 70F, the rear side outer top sheet 70R, and the outer side intermediate sheet 100 (the skin contact surface side) are provided with a floc An absorbent body 40 composed of pulp and a polymer water-absorbent polymer.

The surface sheet 10 is a sheet which forms a skin contact surface which is in direct contact with the wearer's skin. The surface sheet 10 is formed of a liquid-permeable sheet such as a hydrophilic nonwoven fabric, a woven fabric, an open plastic film, or an open hydrophobic nonwoven fabric. The surface sheet 10 of the present embodiment is formed of a hydrophilic spunbonded nonwoven fabric having a basis weight of 23 g/m ² composed of polypropylene.

The second sheet 15 is joined to the non-skin contact surface side of the surface sheet 10. The second sheet 15 is disposed between the surface sheet 10 and the absorber 40. By providing the second sheet 15, the absorption rate of the body fluid can be increased, and the backflow of the body fluid after absorption can be suppressed.

Since the absorbent body of the disposable disposable diaper 1 of the present embodiment is in close contact with the lower part of the wearer's crotch, the comfort after excretion can be improved by suppressing the backflow of the absorbed body fluid. The second sheet 15 is, for example, a hot air non-woven fabric, an apertured film, or the like. The second sheet 15 of the present embodiment is formed by a hot air non-woven fabric of 50 g/m ² (hydrophilic).

The absorber 40 is disposed between the composite sheet in which the surface sheet 10 and the second sheet 15 are joined, and the absorber-coated sheet 30. The absorber 40 has a front-back direction from the front waistline region S1 toward the rear waistline region S2 and a width direction W orthogonal to the front-rear direction. The absorber 40 has an inner direction IN facing the wearer of the disposable disposable diaper 1 and a direction OUT outside the opposite side. The absorber 40 is formed of a mixed powder of pulverized pulp, a superabsorbent polymer or the like.

The absorber 40 is placed on the first layer 41 and the first layer 41 on the non-skin contact surface side of the wearer and is located on the wearer's skin contact surface. The second layer 42 of the side is formed. In the first layer 41 of the absorber 40, a central opening 45 is formed in the center of the width direction W. A pair of first side slits 46 are formed on both outer sides in the width direction of the central opening portion 45. The structure of the absorber 40 will be described in detail later. The central opening and the first side slit function as a bending portion to be described later, and function as a guiding portion.

An absorbent sheet 90 is disposed on the skin contact surface side of the absorbent body in the back waist region. The absorbent sheet is disposed at a position further rearward than the second sheet 15. The absorbent sheet is a composite sheet in which an absorbent polymer is sandwiched, and the body fluid is held in the rear waist region to prevent the body fluid held by the absorbent body from returning to the wearer side. The structure of the absorbent sheet will be described in detail later.

The absorbent article 1 has a central elastic material 44 that is disposed to overlap the central opening 45 in the thickness direction T of the absorbent article 1.

The elastic material, the slit, and the like formed in the absorbent body 40 are configured such that when the disposable disposable diaper 1 is worn, the absorbent body 40 is bent. In the present embodiment, the central elastic material 44 and the central opening 45 constitute a central curved portion, and the first side slit 46 constitutes a first curved portion.

The side sheets 60 are formed at both side ends in the width direction W of the absorber 40, and the surface sheets 10 and the absorber inner covering sheets are integrally wrapped. The side sheet 60 is formed by a sheet such as a liquid-impermeable nonwoven fabric. The side sheet 60 of the present embodiment is a polypropylene non-woven fabric of 15 g/m ² .

The end portions of the side sheets 60 in the width direction, the side sheets overlap each other. In a portion where the side sheets are overlapped with each other, the leakage preventing elastic material 53 (refer to FIG. 3) is disposed in a state of being elongated in the front-rear direction. The side sheet 60 and the leakage preventing elastic material 53 constitute a leakage preventing wall for preventing leakage of the excrement.

The leakage preventing walls are provided at both end portions in the width direction of the absorbent body 40 along the front-rear direction of the absorbent article 1. The leakage preventing elastic material 53 is disposed between the folded side sheets 60, and is provided in a plurality of positions along the front-rear direction of the absorbent article 1 in a state in which the absorbent article 1 is stretched in the front-rear direction.

The leakage preventing elastic material 53 of the present embodiment is an elastic yarn, and is stretched and fixed at two sides of the right and left sheet side at a rate of 780 dtex and an elongation ratio of 3.0 times. The side sheet 60 is fixed to the non-skin contact surface side of the sheet covering the absorbent body, and is folded back from the both end portions in the width direction of the absorbent body toward the surface sheet side. The side sheet 60 is fixed to the surface sheet 10 by coating a plurality of hot melt adhesive type adhesives in an amount of 0.1 g/m by a method of granular coating.

The exterior top sheet is provided with a front outer top sheet 70F disposed on the front waistline region S1 and a top outer top sheet 70R disposed on the rear waistline region S2. In the thickness direction T, the front exterior top sheet 70F is disposed between the front exterior back sheet 80F and the absorber 40. In the thickness direction T, the rear exterior top sheet 70R is disposed between the rear exterior back sheet 80R and the absorber 40. In the front-rear direction, an exterior intermediate sheet 100 is disposed between the front-side exterior top sheet 70F and the rear-side exterior top sheet 70R.

The front end portion of the exterior intermediate sheet 100 is joined to the rear end portion of the front exterior top sheet 70F, and the rear end portion of the exterior intermediate sheet 100 is joined to the front end portion of the rear exterior top sheet 70R. Outer intermediate sheet 100 is horizontal The front outer surface top sheet 70F and the rear outer surface top sheet 70R are disposed. The exterior intermediate sheet 100 is joined to the surface side of the outer top sheet by a hot melt adhesive type adhesive which is continuously applied by a slit coater.

The exterior intermediate sheet 100 is formed by a nonwoven fabric or the like. The topsheet of the present embodiment was composed of an SMS nonwoven fabric having a basis weight of 15 g/m ² formed of polypropylene. The exterior intermediate sheet 100 is located on the inner side (the skin abutting surface side) of the outer top sheet when worn.

The front outer top sheet 70F and the rear outer top sheet 70R are in the front waistline region S1 and the rear waistline region S2, and the width W is formed to be larger than the urination region S3. The front outer top sheet 70F and the rear outer top sheet 70R may be formed by a hot air non-woven fabric, a spunbonded nonwoven fabric, an SMS non-woven fabric, a waterproof film, or the like. The topsheet of the present embodiment was composed of an SMS nonwoven fabric having a basis weight of 15 g/m ² formed of polypropylene.

The front exterior back sheet 80F is attached to the front waistline region S1, and is provided closer to the non-skin contact surface side than the front exterior topsheet 70F. The rear exterior back sheet 80R is provided in the rear waistline region S2 at a position closer to the non-skin contact surface than the rear exterior top sheet 70R. One end of the front side outer surface back sheet 80F (the rear side exterior back sheet 80R) in the front-rear direction is provided to be folded back toward the skin abutting surface side, and the front side outer top sheet 70F is wrapped (the rear side outer top sheet 70R) The end of the front and rear direction.

The front exterior back sheet 80F and the rear exterior back sheet 80R can be formed by a hot air non-woven fabric, a spunbonded nonwoven fabric, an SMS non-woven fabric, a waterproof film, or the like. In the present embodiment, the front outer surface back sheet 80F and the rear side outer surface back sheet 80R are each formed of a spunbonded nonwoven fabric having a basis weight of 17 g/m ² formed of polypropylene.

The absorbent inner cover sheet 30 is partially adhered to the front outer top sheet 70F, the rear outer top sheet 70R, and the outer intermediate sheet 100.

Waist wrinkles 3 are provided in the front waistline region S1 and the back waistline region S2. The waist wrinkle 3 has an elongated waist elastic material 3A that is disposed such as a synthetic rubber that expands and contracts along the width direction W of the absorbent body 40. The waist elastic material 3A is joined to the front side outer top sheet 70F and the front side exterior by an adhesive (for example, a hot melt adhesive) in a state in which the disposable diaper 1 is stretched in the width direction W of the disposable diaper 1 The back sheet 80F and the rear side exterior top sheet 70R and the rear side exterior back sheet 80R are interposed.

By arranging the waist elastic material, it is possible to hold the disposable wearing article in the waist portion, and it is possible to prevent the disposable wearing article from slipping down. Therefore, even when the body fluid is held by the absorbent sheet 90 to be described later, the rear side of the absorbent body becomes heavy, and the absorbent body can be prevented from slipping down, and a gap can be prevented from occurring between the absorbent body 40 and the wearer's body.

The waist gathers 3 are formed continuously from the front waistline edge portion 4 located on the outer side in the width direction W of the absorbent article 1 in the front waistline region S1 to the other front waistline edge portion 4', and are located in the rear waistline region S2. The rear waistline edge portion 6 of one of the outer sides in the width direction W of the absorbent article 1 is continuous until the other front waistline edge portion 6'.

A foot wrinkle 5 is formed on the rear exterior back sheet 80R. Foot folds 5 Formed along the wearer's foot. The foot wrinkles are formed by an elongated foot elastic material which is provided as a stretchable synthetic rubber or the like. The foot elastic material is constituted by the foot elastic material 5F disposed before the front waist region S1 and the foot elastic material 5R disposed after the rear waist region S2. The foot wrinkles 5 are set so as not to cross the absorber 40.

The foot elastic material functions as a hip elastic member that suppresses the lowering of the waist region S2 after the hip region is formed by the absorbent sheet 90 to be described later. When the body fluid is concentrated on the absorbent sheet 90, the waist region S2 is lowered after the absorbent sheet 90 is disposed. However, by arranging the foot elastic material that expands and contracts in the front-rear direction in the width direction outer side of the absorbent sheet, it is possible to suppress the rear waistline region S2 from sliding down. From such a viewpoint, it is preferable that the foot elastic material is disposed in the vicinity of the front end portion of the absorbent sheet 90.

Further, the buttocks-retractable member of the present invention may be configured to be expandable and contractable in a front-rear direction before being worn by the wearer. For example, in a state in which the wearer is worn, a part of the absorber 40 disposed in the back waistline region S2 is in a state before wearing, and a rearward direction is a vertical direction. Therefore, the buttocks-retractable member can function to expand and contract in the up-and-down direction after being worn to the wearer, and to suppress the rear waistline region S2 from falling downward.

Moreover, the buttocks-and-retractable member of the present invention may be configured to be expandable and contractable in at least the front-rear direction in the front-rear direction and the width direction, and may be stretched in the width direction in the front-rear direction. For example, it may be a stretchable member that expands and contracts in a direction in which the front-rear direction is inclined, and has a component that expands and contracts in the width direction and a component that expands and contracts in the front-rear direction. Therefore, it can also be shaped like this embodiment In the same manner, it is arranged obliquely in the front-rear direction, and can also be arranged along the front-rear direction.

The foot elastic material is joined between the front outer top sheet 70F and the front outer back sheet 80F, and the rear outer top sheet 70R and the rear outer back sheet 80R.

The foot elastic material of the present embodiment has three strips which are elongated and stretched by a thickness of 780 dtex and an elongation ratio of 1.5 to 3.5 times. The foot elastic material is disposed in a state in which a part of a portion is given a slope of magnification.

The foot elastic material is fixed by a hot melt adhesive type adhesive which is previously coated on the outer top sheet. The hot melt adhesive type is applied by a spiral spray. The coating amount of the foot elastic material was set to 7 g/m ² . The adhesive was applied by a slit coater at a position where at least the end portion of the exterior top sheet (about 5 mm from the end portion) overlapped with the foot elastic material. Thus, by applying the adhesive, the foot-elastic material can be prevented from being detached from the end portion of the exterior surface sheet.

Further, when the adhesive is applied by a non-contact type spiral spray, the adhesive in the vicinity of the end portion of the exterior top sheet is extruded, which causes a defect in manufacturing. However, by coating with a contact slit coater, extrusion of the adhesive can be prevented. Further, the coating amount of the slit coater was set to 10 g/m ² .

The central elastic material 44 is provided along the front-rear direction, and is disposed at a position overlapping the central opening 45 in the thickness direction T of the disposable disposable diaper 1 after use. The central elastic material 44 is formed so as to be convex in the inward direction IN, that is, the absorbent body 40 is bent toward the wearer, and is formed to overlap the absorber 40 in the front-rear direction. The central elastic material 44 is attached to the width of the absorbent article It is arranged in the extended state toward the center in the front-rear direction. The central elastic material 44 is disposed in the urination area S3.

The central elastic material 44 is provided between the elastic material covering sheet 43 and the absorber inner covering sheet 30 in an extended state. The central elastic material 44 is disposed at an expansion ratio of 1.4 to 3.0 times. The central elastic material of the present embodiment has a central elastic member located at the center in the width direction and an auxiliary central elastic material located outside the width direction of the central elastic member.

The central elastic member is disposed at an elongation ratio of 1.4 to 3.0. In the center elastic member of the present embodiment, three pieces are stretched and fixed at a thickness of 620 dtex and an elongation ratio of 2.5 times. The central elastic members are spaced 5 mm apart and then each have a length of 120 mm. The central auxiliary elastic member is disposed 1.2 to 2.5 times lower than the central elastic member. The center-assisted elastic member of the present embodiment is stretched and fixed one by one in a thickness of 620 dtex and an elongation ratio of 1.8 times. The two ends of the central elastic member were disposed at intervals of 5 mm in the front-rear direction at the same position from the central elastic member at intervals of 5 mm in the width direction.

The central elastic material 44 is an elastic yarn, and a hot melt adhesive type adhesive is applied in a V slit manner. As the central elastic material 44, a stretchable nonwoven fabric or the like can also be used. The elastic material covering sheet 43 is formed of a sheet such as a non-woven fabric. In the present embodiment, an SMS nonwoven fabric (hydrophobic property) having a basis weight of 15 g/m ² formed of polypropylene is used.

Examples of the material of the central elastic material 44 include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and chloroprene rubber, natural rubber, EVA, stretchable polyolefin, elastic yarn, and hair. Polyurethane or the like. In addition, as the material of the central elastic material 44, an elastomer fiber such as an urethane type or a polystyrene type may be mixed with a thermoplastic fiber such as a stretchable polyolefin type or a polyester type, and then subjected to elongation processing. An elastic sheet of a stretchable nonwoven fabric or the like formed.

The side end elastic material 49 is attached to both sides of the absorbent body in the width direction, and is bonded between the cover sheet 30 and the side sheet 60 by the adhesive. The side end elastic material 49 is disposed along the front-rear direction and is disposed across a part of the urination area S3 and the rear waist area S2.

As a fixing means of the side end elastic material 49, a hot melt adhesive type adhesive or the like is provided. In the side end portion elastic material 49 of the present embodiment, an elastic yarn is used, and a hot melt adhesive type adhesive is directly applied by a V slit method. The side end portion elastic material 49 of the present embodiment is attached to the left and right sides, and is stretched and fixed at a thickness of 780 dtex and an elongation ratio of 2.3 times.

Further, the side end elastic material 49 and the forefoot elastic material 5F, and the side end elastic material 49 and the rear leg elastic material 5R are arranged slightly in a plane view angle. With such an arrangement, it is possible to expand and contract the leg hole, and it is possible to improve the fit of the leg hole and to prevent the paper diaper from being displaced or leaked.

Further, the elongation stress of the elastic material can be measured in the following manner.

(1) The material of each of the elastic materials is cut so as to include all the elastic materials forming the convex portions in the width direction. Specifically, for example, in the wearing article of the present embodiment, the material of the central elastic material in which three strips are disposed at intervals of 5 mm is stretched to a state in which it is not slackened. Next, cut into a width of 13 mm × length of 100 mm. Similarly, in the extended state, the both ends in the front-rear direction are respectively marked toward the inner side of 10 mm. The elongation stress is measured by a pull tester (for example, model: 5564) manufactured by Instron Japan Company Limited or an automatic developing device (for example, model: AGS-1kNG) manufactured by Shimadzu Corporation.

(2) The sample held by the upper chuck (1) is such that the marking portion becomes the inner end portion of the chuck and the other marking portion becomes the inner end portion of the chuck, and the lower chuck is held. The length of the sample between the chucks was 80 mm. In addition, when the length of the wrinkles which are effective as the elastic material is shorter than 100 mm, the length of the shortest length of the elastic material which is effective as the wrinkles is 20 mm shorter than the length of the sample between the chucks. Since the initial inter-clamp distance is set to a tension at which the sample is not applied at an initial stage, it is set to be shorter than the length (naturally long) when the sample has contracted. The sample was pulled up and down at a condition of 100 mm/min so that the sample was elongated by separating the chucks from each other.

(3) When the sample is elongated so that the material for holding the elastic material is not slack, the length between the chucks of the sample is set to 100%, and the sample is extended until the length between the chucks of the sample becomes 90%. The elongation stress of the sample as the elongation stress of the elastic material. That is, in the above-described embodiment, the 100% length dimension of the sample was measured to be 80 mm, and the sample was extended until the elongation stress at 90% of 72 mm.

Further, the thickness of the absorber 40 is measured in a state in which the length of the product of the absorbent body 40 and the width of the product are extended (that is, a flat state in which wrinkles are not generated), and the portion to be measured is sandwiched between the thickness measuring devices. As the measuring device that can be used, for example, a thickness gauge made of PEACOCK (measurement section: diameter: 5 mm, pressure at the time of measurement: 163 g/cm ² ) can be used.

In addition, the member described in the above-mentioned disposable disposable diaper 1 may be, for example, a material described in JP-A-2006-346439.

(2) Composition of absorbent sheets

Next, the absorbent sheet 90 disposed on the skin contact surface side of the absorbent body 40 in the back waistline region S2 will be described. The absorbent sheet 90 is a composite sheet in which the absorbent polymer 91 is sandwiched by two liquid permeable sheets 92, 93. The liquid permeable sheets 92, 93 may be, for example, non-woven fabric. Further, an absorbent sheet in which the absorbent polymer 91 is sandwiched by three or more liquid permeable sheets may be produced, or one liquid permeable sheet may be folded and the absorbent polymer may be sandwiched to produce an absorbent. Sex sheets.

The absorbent polymer 91 is a polymer that absorbs moisture, for example, an absorbent polymer having a three-dimensional lattice structure in which a water-soluble polymer is moderately crosslinked. Such an absorbent polymer is water which absorbs hundreds to thousands times as much as the volume before absorbing moisture, but is essentially water-insoluble, and the absorbed water does not separate regardless of the pressure applied.

The absorptive polymer 91 is, for example, a starch-based or acrylic-based particulate or fibrous polymer. After the absorbent polymer 91 is sandwiched between the two liquid permeable sheets 92, 93, the two liquid permeable sheets 92, 93 are joined to each other to form the absorbent sheet 90. In order to prevent the absorbent polymer 91 from leaking after the absorbent polymer 91 is sandwiched between the two liquid permeable sheets 92, 93, the particle size of the absorbent polymer 91 is made smaller. The fiber gap of the liquid permeable sheets 92, 93 is preferably coarse.

As the liquid permeable sheets 92, 93, for example, a spunbonded nonwoven fabric, a dot-bonded nonwoven fabric, a hot air non-woven fabric, an SMS nonwoven fabric, or the like can be used. Since the liquid permeable sheets 92 and 93 are required to have permeability to urine, it is preferred to carry out a hydrophilization treatment. In the present embodiment, as the liquid-permeable sheets 92 and 93, a hot air non-woven fabric of 25 g/m ² subjected to hydrophilization treatment was used.

The surface of the liquid permeable sheets 92 and 93 that sandwiches the absorbent polymer 91 is provided with a plurality of portions (not shown) that are arranged in the width direction in the front-rear direction. On the surface of the liquid permeable sheets 92 and 93 that sandwich the absorbent polymer 91, a contact portion that extends in the front-rear direction and is arranged in a plurality of directions in the width direction is provided. Further, a contact portion may be provided on the surface of the liquid permeable sheets 92, 93 of the liquid permeable sheets 92, 93 on which the absorbent polymer 91 is sandwiched. The subsequent portion is formed by, for example, coating a hot melt adhesive into a strip shape.

Thereby, the absorbent polymer 91 is fixed to the liquid permeable sheets 92, 93. The reason why the rear portion extends in the front-rear direction and is arranged in the width direction in a plurality of manners, that is, the reason why the rear portion is strip-shaped is that the permeability of the urine of the joint portion is easily lowered, and the region where the joint portion does not exist is provided. The reason. Therefore, in the case where the coating method in which the region where the adhesive portion does not exist can be provided, that is, the coating method in which the adhesive portion can be intermittently disposed, the coating method is not limited to the strip coating method, and the coating may be performed such as omega coating. Non-contact coating method.

Since the adhesive portion is intermittently provided in the absorbent polymer disposing region 96 to be described later, the absorbent polymer 91 can be prevented from being biased in the absorbent polymer disposing region 96. Provided in the liquid permeable sheet 93 on the side of the absorber 40 The distance between the adjacent portions of the adjacent portions of the adjacent portions is smaller than the distance between the portions of the succeeding portions of the liquid-permeable sheet 92 provided on the surface sheet 10 side. Thereby, the absorbent polymer can be uniformly fixed to the liquid permeable sheet 93 on the side of the absorber 40.

By providing a strip-shaped back portion colored in blue or the like on the liquid-permeable sheets 92 and 93, a stripe-like texture such as blue can be imparted to the absorbent article 1, and therefore, the absorbent article 1 is provided. The appearance is better. Further, the end portion may be provided only on the surface of the liquid permeable sheet 93 on the side of the absorber 40 that sandwiches the absorbent polymer. By providing the adhesive portion on the liquid-permeable sheets 92 and/or 93, it is possible to prevent the absorbent polymer from moving in the absorbent sheet 90 before the absorbent polymer expands. The absorbent sheet 90 is preferably disposed in a region of at least a part of the rear waistline region S2 from the center in the front-rear direction of the urination region S3 to the rear waistline region S2.

By arranging the absorbent polymer in the back waistline region S2 in this manner, the absorption capacity of the back waistline region S2 can be improved, and in particular, it is possible to improve the leakage from the rear waistline region when riding or sleeping.

In the absorbent sheet 90, the absorbent polymer is disposed in a plurality of absorbent polymer placement regions 96 (hereinafter referred to as absorbent polymer placement regions), and is disposed between the respective absorbent polymer placement regions 96. A region (hereinafter referred to as an absorbent polymer non-arrangement region) 97 in which an absorbent polymer is disposed. In addition, in FIG. 2, the absorptive polymer arrangement|region 96 is shown by the diagonal line.

By interactively arranging the polymer configuration region and the polymer non-configuration region, even the absorbent polymer in the absorbent polymer configuration region 96 is attracted When the urine is completely inflated and the urine is not absorbed further, the urine can be absorbed by the absorbent body 40 through the absorbent polymer non-arrangement region 97. Further, regarding an absorbent article which does not continue to be used until the absorbent polymer is completely expanded, it is not necessary to provide an absorbent polymer non-arrangement region in the absorbent sheet.

The shape of the absorbent polymer arrangement region 96 in the planar direction is in the front-rear direction of the absorbent article 1, and is convex from the front waistline region S1 toward the rear waistline region S2 and extends along the width direction of the absorbent article 1. V shape. That is, the shape of the absorbent polymer arrangement region 96 in the planar direction is a V-shape in the direction of the front-rear direction of the absorbent article 1 and the vertex in the direction from the front waistline region S1 to the rear waistline region S2. Among them, the absorbent polymer disposing region 96 farthest from the front waistline region S1 has a shape in which the center in the width direction is cut in a slightly V-shape or a slightly arc-shaped shape and is divided into two regions. Since the slightly V-shaped shape of the absorbent polymer disposing region 96 is along the shape of the wearer's buttocks, the absorbent polymer disposing region 96 can be in close contact with the wearer's buttocks, in wearer and absorbent. The gap between the articles 1 becomes less likely to occur. Further, if there is an absorbent polymer non-arrangement region, the shape of the absorbent polymer arrangement region is not limited to a substantially V shape. For example, the shape of the absorbent polymer arrangement region may be a circular arc shape, a circular shape, a rectangular shape, a triangular shape or the like.

As described above, after the absorbent polymer is sandwiched between the two liquid permeable sheets 92, 93, the two liquid permeable sheets 92, 93 are joined to each other, whereby the absorbent sheet 90 is produced. The region where the absorbent polymer is sandwiched between the two liquid permeable sheets 92, 93 is the absorbent polymer disposed region 96, and The region where the two liquid permeable sheets 92, 93 are not sandwiched with the absorbent polymer and the two liquid permeable sheets 92, 93 are joined to each other is the absorbent polymer non-arrangement region 97.

The two liquid permeable sheets 92, 93 are joined to each other, and strength is required to withstand the swelling force based on the swelling of the absorbent polymer. For example, when the two liquid permeable sheets 92, 93 are peeled off from each other due to swelling of the absorbent polymer, a gap is formed between the two liquid permeable sheets 92, 93, and the absorbent polymer enters the gap. The occurrence of the disappearance of the absorbent polymer non-arrangement region 97 occurs. The liquid permeable sheets 92, 93 are joined to each other, and heat sealing, sound wave sealing, an adhesive, or the like can be used.

When the liquid-permeable sheets 92 and 93 are joined to each other by heat sealing, the line pressure in the width direction of the heat seal becomes constant, and the sealing strength becomes uniform for the whole. Therefore, the line pressure in the width direction of the heat seal is necessarily constant. In order to make the line pressure in the width direction of the heat seal uniform, it is necessary to make the total cooperation of the length in the width direction of the region to be sealed constant. For example, as described above, the absorbent polymer arrangement region 96 is formed in a substantially V shape or a slightly arc shape and arranged in the front-rear direction, whereby the total length of the absorbent polymer non-arrangement region 97 in the width direction can be made. Cooperation has become roughly certain. When the liquid permeable sheets 92, 93 are joined to each other by using an adhesive, when the absorbent polymer swells, the liquid permeable sheets 92, 93 are wet, so that the adhesive can exhibit strength even when wet. The form of the adhesive is preferred.

Since the absorbent polymer swells when it absorbs urine, the absorbent polymer is in two sheets of liquid permeable sheets in the absorbent polymer arrangement region 96. Between 92 and 93, it is preferable to ensure a volume which allows the absorbent polymer to sufficiently swell. Between the two liquid-permeable sheets 92, 93, the absorbent polymer cannot be completely swollen when the absorbent polymer is excessively placed in a dense manner, so that absorption of the absorbent polymer may not be sufficiently utilized. The situation can be.

When the number of absorbent polymer disposing regions 96 of the absorbent sheet 90 is increased, the area of the absorbent polymer non-arranged region 97 is increased, but the total volume of the absorbent polymer due to the absorbent sheet 90 is increased. As a result, the amount of urine absorbed by the absorbent sheet 90 is reduced. On the other hand, when the number of the absorbent polymer disposing regions 96 of the absorbent sheet 90 is reduced, the total amount of the absorbent polymer of the absorbent sheet 90 is increased, and the amount of the absorbent sheet 90 capable of absorbing the urine is increased. However, the area of the absorbent polymer non-arranged region 97 is small, and the urine may not be transmitted through the absorbent sheet 90 and may be absorbed by the absorbent body 40 after the absorbent polymer is swollen.

When the balance between the amount of urine and the urine permeability of the absorbent sheet 90 after swelling of the absorbent polymer is considered, the volume after swelling is further considered from the type and amount of the absorbent polymer, and it is necessary to select an absorbent polymerization. The number of object configuration areas 96. For example, in the case of an absorbent sheet having a size of 180 mm × 130 mm, urine can be obtained by disposing 2 g of an absorbent polymer capable of absorbing 60 g of physiological saline per 5 g in five absorbent polymer-arranged regions. An absorbent sheet having a good balance between absorbability and urinary permeability after swelling of the absorbent polymer.

The absorbent sheet 90 may be disposed on the non-skin surface of the absorbent body 40. Side, however, is better placed on the side of the skin. When the wearer makes a seat or a seat, a sleeping position, or the like, the urine absorbed by the absorber 40 in the region of the back waistline region S2 is oozing out due to the pressure (body pressure) of the body weight applied to the absorber 40. However, the exuded urine becomes less likely to reach the wearer's skin side by the absorbent sheet 90. Since the absorbent sheet 90 is substantially composed of an absorbent polymer, the urine hardly oozes out even when the body pressure is applied. Therefore, even after the urination, the skin is still dry, and it is possible to suppress the occurrence of rash caused by the urination of the wearer's skin.

Moreover, by the lifting effect by the foot-elastic material, even if the absorbent sheet 90 absorbs liquid and becomes heavy, the absorber does not detach from the skin. Therefore, the gap between the absorbent body and the skin becomes less likely to occur, and in particular, the leakage along the skin can be reduced. In the case where the absorbent body is not detached from the skin, the body fluid oozing from the absorbent body 40 easily reaches the skin side of the wearer, and the skin rash is particularly likely to occur. Therefore, it is more preferable to arrange the absorbent sheet 90 on the skin surface side of the absorbent body 40.

(3) Structure of the absorber

Figure 6 is a plan view of the absorbent body 40. As shown in FIG. 6, the absorber 40 has the first layer 41 and the second layer 42 which overlaps with the first layer 41. The first layer 41 is on the non-skin contact surface side of the wearer, and the second layer 42 is on the wearer's skin contact surface side.

The first layer 41 and the second layer 42 are composed of flocculent pulp and polymer absorbent polymer (SAP). Absorber 40 may be, for example, pulp 0 ~ 500g / m ² and SAP0 ~ 500g / m ² to form mixed.

Forms of the present embodiment the first layer 41 based pulp 280g / m ² and SAP170g / m ² to form a mixture having a thickness of about 3.1mm. Forms of embodiment of this second layer 42 based pulp 260g / m ² and SAP160g / m ² to form a mixture having a thickness of about 2.9mm. Therefore, the thickness of the absorber 40 is 6.0 mm.

The first layer 41 is formed with a central opening 45 and a pair of first side slits 46. The central opening portion 45 is formed at a central portion in the width direction W. The central opening 45 and the first side slit 46 have a vertically long shape extending in the front-rear direction. The central opening portion 45 and the first side slit 46 are formed to extend in the front-rear direction in the urination region S3, and serve as an absorbent sheet for guiding the body fluid absorbed by the absorber 40 of the urination region S3 to the rear waistline region S2. The guidance of the 90 is to function.

The rear end portion of the central opening portion 45 may be disposed to overlap the absorbent sheet 90, or may be disposed so as not to overlap the absorbent sheet but close to each other. Further, it may be arranged such that an absorbent sheet exists on an extension line toward the rear of the central opening.

By arranging the central opening portion and the absorbent sheet in the above manner, the central portion of the absorbent body can be more easily flexed toward the wearer's skin side. In addition, the body fluid sucked by the absorber such as the central opening 45 and the first side slit 46 can be smoothly guided to the rear waistline region S2 via the central opening or the like. By inducing the body fluid to the absorbent sheet 90 disposed in the back waistline region S2, the body fluid can be preferentially concentrated on the portion having a high absorptive capacity.

Therefore, the absorption capacity can be effectively utilized, and the absorbent article can be improved. Absorption capacity of the body. Further, when the discharged urine is concentratedly held in the crotch portion, the absorbent body is inflated in the crotch portion, causing the feet to become difficult to be gathered together to cause a large discomfort or to become difficult to walk. However, by inducing urine to the absorbent sheet at a very distant position separated from the urination area and maintaining it intensively, the thickness of the absorbent body is increased by absorbing the absorbent polymer after absorbing urine in the lower part of the sputum. The discomfort caused by the big one can increase the absorption efficiency and reduce the leakage.

Further, the absorbent polymer arrangement region 96 and the central opening portion 45 have a distance of about 10 mm in a plane view angle. The intermediate region 110 is defined between the absorbent polymer arrangement region 96 and the rear end portion of the central opening portion 45. In order to concentrate the body fluid in the absorbent polymer disposing region 96, it is necessary to make the structure of the intermediate portion 110 such that the body fluid can be diffused even if the urine is repeatedly discharged. From such a viewpoint, it is necessary to set the weight ratio of the absorbent polymer in the intermediate portion to less than 80%. The weight ratio of the absorbent polymer in the intermediate portion of the present embodiment was 38%.

Further, the guide portion of the present embodiment is constituted by an opening formed in a slit or the like of the absorber, but is not limited to this configuration. For example, the absorbent body may be composed of a low basis weight region having a lower basis weight than the surrounding base weight, or may be formed by a press portion that compresses the absorbent body in the thickness direction.

For example, in the case where the guide portion is constituted by the low basis weight region, since the basis weight of the absorbent polymer in the low basis weight region is lower than the basis weight of the absorbent polymer in the press section, even when the absorption is repeated It is also excellent in that it does not block the groove (the passage through which the liquid passes).

Moreover, in the case where the guide portion is constituted by the press portion, since the density is high, Therefore, the diffusibility is excellent, and it is extremely excellent in that the guide portion is formed in a low basis weight region, and in particular, it can be actively diffused in the direction against the gravity.

Further, the low basis weight region of the present invention means a region having an average basis weight of the absorbent layer constituting the surrounding absorbent body and a basis weight ratio of 50% or less. The basis weight can be measured by, for example, the method described below. First, in the region to be the object of the product, the surface sheet was marked with a width of 10 mm and a length of 50 mm, and the absorbent body was cut into the sheet member at this size, and the initial weight was measured. This weight was set to A (g).

Next, the sheet member (surface sheet, second sheet, inner covering sheet, and the like) which are cut together is washed with an organic solvent such as toluene and dried, and then the weight is measured to obtain the total weight of the sheet member. This weight was set to B (g).

Using the initial weight (A) and the weight (B) of the sheet member, the basis weight of the absorber was calculated by "(AB) ÷ taking the size". Specifically, the basis weight X of the present embodiment can be calculated by (AB) / (10 × 50 / 1000 / 1000) (g / m ² ). Further, the above weight is the weight of the hot melt adhesive type adhesive, but it is also negligible because the weight is extremely small compared to the weight of the absorbent body.

The basis weight ratio was calculated from the basis weight of the absorber obtained by the above method.

The basis weight ratio = (basis weight of the absorber in the low basis weight region) / (basis weight of the surrounding absorber) × 100 The low basis weight region is a region in which the basis weight ratio is 50 (%) or less.

That is, those who meet the following conditions are considered as low basis weight regions.

(basis weight of the absorber in the low basis weight region) / (basis weight of the surrounding absorber) × 100 ≦ 50 (%)

Further, in the case where the low basis weight region is located at a portion which is not overlapped with the other absorption layer (for example, a region formed in the first absorption layer is not covered by the second absorption layer), the above method is used to obtain The basis weight of the absorbing layer which is the low basis weight region of the object and the basis weight around the absorbing layer.

Further, in the case where the low basis weight region is located at a portion overlapping the other absorption layer (for example, a region formed in the region of the first absorption layer and covered by the second absorption layer), it is difficult to measure the low basis weight of one absorption layer. Since the basis weight of the region is determined, the basis weight X1 of the portion where the absorption layers overlap in the low basis weight region of the object is obtained, and then the basis weight X2 of the absorber portion of the surrounding overlapping portion is obtained, and further, the basis weight is further obtained. The basis weight X3 of the portion of the overlapping individual layers is thereby determined by the basis weight of the low basis weight region.

Further, in this case, (1) in the case where the absorption layer having a low basis weight region coincides with the above-described individual layer, the low basis weight region is (X1-X2+X3)÷X3×100≦50 (%).

Further, (2) in the case where the absorption layer having a low basis weight region does not coincide with the above-described individual layer, the low basis weight region is (X1-X3) ÷ (X2-X3) × 100 ≦ 50 (%).

That is, the basis weight can be measured by the above three methods in accordance with the structure of the low basis weight region.

Further, by forming the central opening portion 45, it is easy to convexly bend the central portion 40C toward the wearer side, that is, the inner direction IN. First side slit 46 The center opening portion 45 is formed closer to the outer side in the width direction than the center opening portion 45. The first side slit 46 has a vertically long shape extending in the front-rear direction. The pair of first side slits 46 form the absorber 40 in the front-rear direction so as to be convex in the outward direction OUT, that is, the absorber 40 is curved in a convex shape opposite to the center opening portion 45.

The second layer 42 has a slightly hourglass shape. The second layer spans the boundary between the rear waistline region S2 and the urination region S3, and has a superimposed portion overlapping the first layer as it goes toward the inner side in the width direction toward the urination region side when viewed in the longitudinal direction. The part of the realm of non-overlapping parts. Since the bending rigidity of the overlapping portion is higher than that of the non-overlapping portion, the deformation of the urination region that is bent outward in the direction opposite to the inside of the first side slit can be prevented from being superimposed on the first layer. The overlapping portion is further behind the boundary of the non-overlapping portion.

The width of the absorbent body is preferably 120 to 250 mm in the front waistline region S1 and the rear waistline region S2, and is preferably 120 to 250 mm in the urination region S3.

The length of the central opening 45 in the front-rear direction is longer than the length of the first side slit 46 in the front-rear direction. In the present embodiment, the width of the central opening portion is 40 mm, and the width of the first side slit 46 is 10 mm.

In the urination region S3, the outer end portion 42W in the width direction of the second layer 42 overlaps the inner end portion 41W of the first side slit 46 of the first layer, and is disposed along the front-rear direction. The outer side in the width direction of the outer end portion 42W of the absorber 40 is formed only by the first layer 41, and the inner side of the outer end portion 42W is formed by the central opening portion 45. In addition, it is composed of the first layer 41 and the second layer 42. Therefore, the rigidity and thickness of the absorber 40 are changed by the inner end portion 41W of the first layer 41 and the outer end portion 42W of the second layer 42 as boundaries. In the present embodiment, the outer end portion 42W of the second layer which is changed in rigidity or the like is used as a boundary, and the absorber is bent.

Moreover, the surface sheet 10 is bonded and fixed to the absorber inner cover sheet 30 in the central opening portion 45, so that the absorber can be bent without being broken in shape.

(3) Shape change of the absorber

Fig. 7 is a cross-sectional view schematically showing the wearing state of the disposable disposable diaper 1 (reference line X1-X'1 of Fig. 1). When the disposable diaper 1 is worn, the urination area S3 of the absorbent body abuts against the wearer's armpit. The force is applied to the absorber from the outer side in the width direction toward the inner side in the width direction due to the wearer's foot or the like. In the absorbent body 40, the central elastic material 44, the central opening 45, and the first side slit 46 are used as a base point, and the absorbent body 40 is bent, and the cross-sectional shape in the width direction W of the disposable disposable diaper 1 is changed. Wavy. Therefore, the urination area S3 of the absorber 40 is in a state of being regularly folded.

In the absorbent body 40, the top surface of the absorbent body 40 which is convex in the inward direction IN by the central elastic material 44 abuts against the lower part of the wearer's crotch. The portion formed with the convex portion based on the central curved portion is composed only of the second layer 42 and has a small thickness. Further, between the convex portion based on the central curved portion and the convex portion based on the first curved portion, the first layer 41 and the second layer 42 are heavy Stack, thicker and more rigid. By the portion having a high rigidity between the central curved portion and the first curved portion, the convex portion based on the central curved portion can be supported, and the stability of the convex shape based on the central curved portion can be improved.

Further, a central groove, a slit, or the like extending in the front-rear direction may be provided in the central portion of the central curved portion. By providing a central groove or a slit extending in the front-rear direction in the central portion of the central curved portion, the central portion in the width direction of the central curved portion that is convex toward the skin contact surface side may be formed to face the non-skin contact surface. The recess of the side recess. For example, a slit is formed at a position facing the central opening of the second layer, and since the absorber is not disposed in the portion where the slit is formed, the surface sheet of the portion is formed to be thinner toward the inside. The sheet side is curved while being bent outward to be convex.

Further, when the wearer combines the two legs, the cross-sectional shape of the disposable disposable diaper 1 is such that the absorbent body is folded in the central curved portion and the first curved portion, and is in close contact with each other in the state of being in close contact with each other. Tightly configured.

At this time, the central curved portion formed by the central elastic material 44 and the central opening portion 45 is positioned to abut against the lower portion of the wearer's crotch. In addition, the first bending portion formed by the first side slit 46 is convex toward the non-skin contact surface side, and is a position that does not abut against the wearer's excretory opening.

Since the absorber is in close contact with the wearer's crotch, body fluid leakage can be prevented even when the urine which is slow in urine velocity is discharged along the skin. Further, since the concave portion extending in the front-rear direction is formed in the curved portion of the absorbent body in the folded portion, the body fluid can be diffused outward in the front-rear direction, and lateral leakage can be prevented.

Due to the central opening 45 formed in the absorber, the first side slit Since the bending is performed as the base point, the absorbent body 40 is easily bent even when the absorbent body 40 is swelled by absorbing the liquid, as compared with the case where the absorbent body 40 is formed into a convex portion. In addition, the cross-sectional shape of the disposable disposable diaper 1 and the deformation of the absorbent body 40 is a shape in which the end portion is narrowed from the non-skin contact surface side toward the skin contact surface side. Therefore, it is easy to accommodate in the gap of the wearer's crotch, and it is easy to provide an uncomfortable feeling.

Further, the convex portion formed by the central curved portion is formed only by the second layer 42, and the thickness is thinner than the portion formed by laminating the first layer 41 and the second layer 42. In other words, since the convex portion formed by the central curved portion has a small thickness and a high height, it is easy to be inserted into a narrow gap of the crotch portion, and is easily adhered to the excretory opening. Therefore, since the urination port is in close contact with the absorbent body, the excreted urine can be quickly absorbed. Further, in the portion of the skin close to the wearer's crotch, since the thickness of the absorbent body is small and the thickness is increased from the skin, the body can be fitted without any uncomfortable feeling.

The distance between the central opening portion 45 and the urination portion can be made close by the structure of the fine gap which is easy to enter the lower part of the body. By bringing the distance between the central opening portion 45 and the urination portion close to each other, the discharged urine can be diffused in the front-rear direction by the central opening portion 45 and guided to the absorbent sheet 90 of the rear waistline region S2. By smoothly guiding the body fluid to the absorbent sheet 90, the body fluid can be preferentially concentrated on the portion having a high absorption capacity, and the absorption ability can be more effectively used, whereby the absorption performance can be further improved.

By the manufacturing method of the absorbent article thus constituted, for example The process of forming the first layer of the shaped absorbent body; the process of forming the second layer of the absorbent body; the process of combining the first layer and the second layer; and transporting the absorber or the like by a belt conveyor or the like, during transport, and An absorbent article is produced by a method of joining sheets of absorbent sheets, surface sheets, and the like. Furthermore, other processes can be carried out in accordance with conventional manufacturing methods.

Further, when both the first layer and the second layer are provided with an opening portion, a side slit, or the like, a positional shift occurs when the first layer and the second layer are overlapped. For example, when displacement occurs in the width direction, the width of the slits disposed on the right and left sides is narrowed, and it is impossible to perform regular deformation, and the absorber is left and right unbalanced, which may cause absorption, wearing feeling, and the like. The bad influence. However, by providing an opening, a side slit, or the like in any of the first layer and the second layer, it is possible to prevent positional displacement of the side slit or the like.

(Disposable disposable diaper for use in Modification 1)

Next, the structure of the absorber of the disposable diaper after the modification will be described with reference to the drawings. The same components as those of the above-described embodiment are denoted by the same reference numerals, and their description will be omitted.

8(a) and 8(b) show the absorber of Modification 1. Fig. 8(a) is a plan view, and Fig. 8(b) is a cross-sectional view showing a section in the front and rear directions along the center in the width direction.

The absorber 40G of the first modification is composed of one layer of a slightly hourglass type. The absorber 40G includes a first region R1 having an absorbent polymer and a second region R2 having a lower basis weight of the absorbent polymer than the first region R1. Furthermore, in FIG. 8, the first area is given a diagonal line and displayed. absorb The area around the first region of the body becomes the second region. The first region is configured by intermittently arranging the absorbent polymer, and is disposed on the non-skin contact surface side of the back waistline region S2 that is in contact with the buttocks.

Further, in the second region, the basis weight of the absorbent polymer may be lower than that of the first region, or may be a region having no absorbent polymer (the basis weight of the absorbent polymer is 0 g/m ² ).

8(c) and 8(d) show the absorber 40H of the second modification. Fig. 8(c) is a plan view, and Fig. 8(d) is a cross-sectional view of the cross section in the front and rear directions along the center in the width direction.

The absorber 40H of the second modification is composed of one layer of a slightly hourglass type. The first region is configured by a highly absorbent core having a high basis weight region in which the absorbent polymer is higher than the surrounding absorbent body, and is disposed on the skin contact surface side of the waist region S2 after coming into contact with the buttocks.

The rear end portion of the central opening of the absorber overlaps the first region in the thickness direction. By overlapping the guide portion and the first region, the body fluid absorbed in the urination region S3 can be directly guided to the first region. Therefore, the body fluid can be quickly and surely moved to the first region, and the use efficiency of the absorbent polymer disposed in the first region can be improved.

In addition, since the first region is disposed on the non-skin contact surface side of the central opening of the absorbent body, the body fluid guided by the central opening is absorbed from the non-skin surface side of the first region. Therefore, the body fluid becomes less likely to adhere to the skin, and the moist feeling can be reduced.

8(e) and 8(f) show the absorber 40J of the modification 3. Figure 8(e) is a plan view, and Figure 8(f) is before the center in the width direction. A sectional view of the section in the rear direction.

The absorber 40J of the third modification is composed of one layer of a slightly hourglass type. The first region is formed by increasing the basis weight of the absorbent polymer of a part of the absorbent body, and is disposed in the waist region S2 after coming into contact with the buttocks.

8(g) and 8(h) show the absorber 40K of the modification 4. Fig. 8(g) is a plan view, and Fig. 8(h) is a cross-sectional view of the cross section in the front and rear directions along the center in the width direction.

The absorber 40K of the fourth modification is composed of one layer of a slightly hourglass type. The first region is constituted by intermittently arranging an absorbent polymer. In the absorber, the low basis weight region 47 that functions as a guide portion and a curved portion is formed along the front-rear direction.

Figure 9 is a plan view of the disposable diaper after use in the modification. In the disposable disposable diaper, the inner end portion in the width direction of the elastic material of the foot extends in the center in the width direction, and the left and right feet are connected by an elastic material. The connected elastic material functions as a width-expandable member that expands and contracts in the width direction.

By continuously arranging the foot elastic material for the left foot and the foot elastic material for the right foot, the foot elastic member can be pulled up in conjunction, and the rear waist region can be effectively pulled up.

In such a configuration, there is a general problem that the shrinkage of the foot-stretching member causes wrinkles in the absorbent body to deteriorate the absorption performance. However, in the present embodiment, since the rigidity is increased by the presence of the first region, the absorbent body is less likely to wrinkle. Since the amount of the absorbent polymer in the first region is large, the rigidity is further improved after the body fluid is absorbed. because As a result, wrinkles are less likely to occur in the absorbent body, and deterioration in absorption performance can be suppressed.

[Other Embodiments]

As described above, the present invention is disclosed by the embodiments of the present invention, but a part of the disclosure and the drawings are not intended to limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques are possible.

For example, in the above embodiment, the shorts-type disposable disposable diaper has been described as an example. However, the present invention is not limited thereto, and can be applied to an open-type disposable disposable diaper and an incontinence pad. Tablets and sanitary napkins, etc.

In the above embodiment, the absorbent body is bent by using a slit, an elastic material, or a boundary portion where the rigidity is changed. However, the absorbent body may be formed by thinning the thickness of the absorbent body or applying embossing to the absorbent body. Let the absorber bend.

Further, the absorbent article of the present embodiment includes the side end elastic material 49, but the side end elastic material 49 may not be provided. Further, the leakage preventing wall has a rising portion (leakproof elastic material 53) for preventing lateral leakage from the underarm, but may not have the leakage preventing elastic material 53.

In the present embodiment, the absorber 40 is a two-layer structure of the first layer 41 and the second layer 42. However, the absorber 40 of the article for wearing of the present invention may be composed of only one layer, or may be composed of three. It is composed of layers above.

Further, in the present embodiment, the central curved portion and the first curved portion are provided, but the second curved portion may be provided closer to the outer side in the width direction than the first curved portion, and the second portion may be provided. a plurality of curved portions such as a curved portion and a third curved portion.

Further, in the third modification, as an example of the first region, an example in which the basis weight of the absorbent polymer of a part of the absorber is increased is described. However, as shown in FIG. The absorbent polymer is disposed on the upper side of the central portion in the width direction of the absorbent body, or the absorbent polymer is disposed over substantially the entire width when viewed in the width direction, or on the surface side of the absorbent body when viewed in the cross section of the absorbent body. Disperse the absorbent polymer.

As such, the present invention also encompasses various embodiments and the like that are not disclosed in this specification. Therefore, the scope of the technology of the present invention is defined by the above-described description only by the specific matters of the invention in the scope of the application.

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

3‧‧‧ Waist wrinkles

3A‧‧‧Waist elastic material

4,4’‧‧‧ front waist circumference

5‧‧‧foot wrinkles

5F‧‧‧Front foot elastic material

5R‧‧‧ rear foot elastic material

6,6’‧‧‧After the waist circumference

8‧‧‧ middle lower margin

10‧‧‧Surface

15‧‧‧Second sheet

30‧‧‧Fabric sheets inside the absorber

40, 40G, 40H, 40J, 40K‧‧ ‧ absorber

41‧‧‧1st floor

41W‧‧‧Inside end

42‧‧‧2nd floor

42W‧‧‧Outer end

43‧‧‧Elastic material coated sheets

44‧‧‧Central elastic material

45‧‧‧Central opening

46‧‧‧1st side slit

47‧‧‧Low basis weight area

49‧‧‧Side end elastic material

53‧‧‧Leakproof elastic material

60‧‧‧ side flakes

70F‧‧‧ front side top sheet

70R‧‧‧ rear side top sheet

80F‧‧‧Front side exterior sheet

80R‧‧‧ rear side exterior back sheet

90‧‧‧Absorbable flakes

92, 93‧‧‧ liquid permeable sheets

96‧‧‧Absorbent polymer configuration area

97‧‧‧Absorbing polymer non-arranged area

100‧‧‧Outer intermediate sheets

110‧‧‧Intermediate area

R1‧‧‧1st area

R2‧‧‧2nd area

S1‧‧‧ front waist area

S2‧‧‧After Waist Area

S3‧‧‧Urine area

Fig. 1 is a schematic perspective view of the disposable diaper 1 after use in the embodiment.

Fig. 2 is a developed plan view of the disposable disposable diaper 1 after use in the embodiment.

Fig. 3 is a cross-sectional view in the width direction of the disposable diaper 1 taken along the line X1-X'1 shown in Fig. 2 .

Fig. 4 is a cross-sectional view of the disposable diaper 1 taken along the line X2-X'2 shown in Fig. 2 in the front-rear direction.

Fig. 5 is a cross-sectional view in the width direction of the disposable diaper 1 taken along the line X3-X'3 shown in Fig. 2.

Fig. 6 is a plan view showing an absorbent body of the embodiment.

Figure 7 is a view schematically showing the disposable disposable diaper 1 of the embodiment A cross-sectional view of the wearing state along the line X1-X'1.

Fig. 8 is a plan view and a cross-sectional view showing an absorbent body of the disposable disposable diaper after the modification.

Figure 9 is a plan view of the disposable diaper after use in the modification.

1‧‧‧Disposable disposable diapers

3‧‧‧ Waist wrinkles

3A‧‧‧Waist elastic material

4,4’‧‧‧ front waist circumference

5‧‧‧foot wrinkles

5F‧‧‧Front foot elastic material

5R‧‧‧ rear foot elastic material

6,6’‧‧‧After the waist circumference

8‧‧‧ middle lower margin

10‧‧‧Surface

15‧‧‧Second sheet

40‧‧‧ absorber

45‧‧‧Central opening

46‧‧‧1st side slit

49‧‧‧Side end elastic material

70F‧‧‧ front side top sheet

70R‧‧‧ rear side top sheet

90‧‧‧Absorbable flakes

96‧‧‧Absorbent polymer configuration area

97‧‧‧Absorbing polymer non-arranged area

110‧‧‧Intermediate area

S1‧‧‧ front waist area

S2‧‧‧After Waist Area

S3‧‧‧Urine area

W‧‧‧Width direction

Claims (7)

A disposable wearing article comprising: a liquid permeable surface sheet; an inner sheet; disposed between the surface sheet and the inner sheet and having a front side and a rear side of the wearer facing the wearer An absorbing body having a front-rear direction and a width direction orthogonal to the front-rear direction, and having a urination region in contact with a region of the wearer's urination portion and a rear side of the urination region and abutting the wearer The buttocks region of the region of the buttocks is provided with an absorbent sheet sandwiching the absorbent polymer between the surface sheet and the inner sheet between the liquid permeable sheets, characterized in that the urination area is not disposed In the absorbent sheet, the absorbent sheet is disposed in the buttock region, and the absorbent body located in at least the urination region of the urination region and the buttock region is provided to extend from the urination region toward the buttock region. The guide portion is provided with a buttocks extending and contracting in the front-rear direction and at least the front-rear direction in the width direction in the buttock region Member. A disposable wearing article comprising: a liquid permeable surface sheet; an inner sheet; and disposed between the surface sheet and the inner sheet and having a front side and a rear side of the body facing the wearer a front-rear direction and an absorbent body in a width direction orthogonal to the front-rear direction, and having a urination region that abuts against a region of the wearer's urination portion; and disposed closer to the urination region and abutting the wearer The hip area of the hip area of the person is characterized by: The absorption system includes a first region having an absorbent polymer; and a second region having a lower basis weight of the absorbent polymer than the first region; and the first region is provided in the absorbent body in the buttock region, The absorbing body of the urination region is provided with the second region, and an absorbing body located in at least the urination region of the urination region and the buttock region is provided with a guiding portion extending from the urination region toward the buttock region, and the hip portion is The region includes a buttocks-stretchable member that expands and contracts in at least the front-rear direction of the front-rear direction and the width direction. The disposable wearing article according to claim 1 or 2, wherein the guiding portion is formed by a slit formed in the absorbent body and a basis weight in the absorbent body At least one of the low and low basis weight regions is formed. The disposable wearing article according to any one of claims 1 to 3, wherein the buttocks stretchable member is a pair of stretchable members disposed along a circumference of the wearer. . The disposable wearing article according to the fourth aspect of the invention, wherein the disposable wearing article further includes a width-expandable member that is disposed across the pair of foot-stretching members, and Stretches and contracts in the aforementioned width direction. Disposable after applying for any of the scopes 1 to 5 of the patent application In the wearing article, a waist elastic material is disposed in the buttock region, and is disposed along the waist circumference of the wearer and expands and contracts in the width direction. The disposable wearing article according to any one of claims 1 to 6, wherein the buttock region is provided with: a plurality of polymer arrangement regions in which the absorbent polymer is disposed; The polymer non-arrangement region in which the absorbent polymer is disposed, and the polymer non-arrangement region is disposed between the plurality of polymer arrangement regions.