JP2014068848A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily insert an absorbent pad into the interior of a longitudinal leakage prevention sheet.SOLUTION: A disposable diaper includes: an interior body 10 including an absorber, which is fixed to the inner surface of an exterior sheet; and a surface sheet coming into contact with the skin. At the end of a back body, at the side of a crotch lower side of a longitudinal leakage prevention sheet, at both sides in the width direction of a product, an elastically flexible member 16 is fixed in its stretched state to a gathering sheet along the longitudinal direction. A three-dimensional gathering is provided so that an inside part is erected in the working state by the elastically flexible member, and the three-dimensional gathering and the longitudinal leakage prevention sheet intersect each other. In the intersection area, the three-dimensional gathering and the longitudinal leakage prevention sheet are fastened, and on the outside of the inside part of the three-dimensional gathering in the width direction, the longitudinal end of the longitudinal leakage prevention sheet is not fixed to the exterior sheet.

Description

  The present invention relates to a disposable diaper that facilitates insertion of an absorbent pad into a space between a front and rear leakage prevention sheet and an interior body.

  The disposable diaper includes an exterior sheet having a front body and a back body, an interior body including an absorbent body fixed to the inner surface of the exterior sheet, and a surface sheet that contacts the skin. The disposable diaper includes a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed by joining a front body and a back body of the exterior sheet on both sides, and a back of the exterior sheet. 2. Description of the Related Art A tape-type disposable diaper that is attached to a wearer by fastening a fastening tape provided on both side portions on the side to a ventral surface of a paper diaper is known. The present invention is applicable to both the pants-type disposable diaper and the tape-type disposable diaper.

  In such disposable diapers, when a disposable diaper is used as a cover material, a separate absorbent pad is attached to the inner surface of the disposable diaper, and the absorbent pad becomes dirty due to excretion by the wearer, the dirty absorbent is absorbed. A method of use in which only the pad is replaced is often used. This is because it is economical because it is not necessary to replace disposable diapers even if there is excretion.

  The absorption pad is fixed by inserting the absorption pad into the starting end portion of the three-dimensional gather using the three-dimensional gather provided on both sides in the width direction of the disposable diaper. In this case, since many wearers are elderly or have physical disabilities, the absorbent pad cannot be worn well inside the three-dimensional gather, and the fit of the absorbent pad and the disposable diaper becomes poor and excreted from around the waist, etc. Objects may leak out.

  In order to prevent the excrement from leaking from around the waist, the waist region solid cuff standing up toward the inner side of the diaper is formed by covering the end region of the absorbent body from the peripheral edge of the absorbent body. A pants-type disposable diaper has been proposed (Patent Document 1). Also, in order to effectively prevent stool and urine leakage from the waist opening, a pants-type disposable diaper in which a three-dimensional guard is formed on the waist around the wearer's waist on the abdomen and / or dorsal side Has also been proposed (Patent Document 2). In addition, in order to prevent leakage of the disposable diaper before and after, a waist barrier sheet is disposed between the barrier cuffs provided on both sides of the product, and a pocket space that opens inward is formed by the waist barrier sheet. Disposable diapers have also been proposed (Patent Document 3). In addition, in order to prevent front and back leakage, an end barrier cuff is provided on the use surface side, and the product center side of the end barrier cuff is not fixed to the liquid-permeable top sheet, and the width of the product in this non-fixed part There has also been proposed a disposable paper diaper which is provided with an elastic stretchable member along the direction, and in use, the non-fixed portion is separated from the liquid-permeable topsheet by contraction of the elastic stretchable member (Patent Document 4). ).

Published Patent Publication No. 2006-263306 Japanese Patent Publication No. 2001-252303 Published Patent Publication No. 1995-184947 Published Patent Publication No. 1998-328234

  When the absorbent pad is attached to the disposable diaper, it is inserted not only inside the three-dimensional gathers provided on both sides in the width direction of the disposable diaper but also inside the front and rear leakage prevention sheet provided at the front and rear ends of the disposable diaper. This improves the integrity of the disposable diaper and the absorbent pad. However, when the absorbent pad is inserted into the front and rear leakage prevention sheet, there is a problem that it takes time to insert the absorption pad because a space is not easily generated between the front and rear leakage prevention sheet and the front sheet.

  Then, the main subject of this invention is making it easy to insert an absorption pad into the inside of a back-and-front leak prevention sheet | seat.

<Invention of Claim 1>
In a disposable diaper comprising an exterior sheet having a front body and a back body, an interior body including an absorbent body fixed to the inner surface of the exterior sheet, and a surface sheet in contact with the skin,
In the back body end, along the width direction, the crotch side is provided with a front and back leakage prevention sheet that is not fixed to the top sheet,
On the crotch side of the front and rear leakage prevention sheet, the crotch side is formed upright by an elastic elastic member fixed in an extended state along the width direction.
Three-dimensional gathers are provided on both sides in the width direction of the product so that the inner side part stands up in the use state by an elastic stretch member fixed in a stretched state along the front-rear direction and on the gather sheet.
The three-dimensional gather and the front and rear leakage prevention sheet intersect,
Three-dimensional gathers and front and rear leakage prevention sheets are fastened in the intersection region,
On the outer side in the width direction from the inner side part of the three-dimensional gather, the longitudinal direction end of the front and rear leakage prevention sheet is not fixed to the exterior sheet,
A disposable diaper characterized by that.

(Function and effect)
The longitudinal end of the front and rear leakage prevention sheet is not fixed to the exterior sheet on the outer side in the width direction from the inner side of the three-dimensional gather, so that the longitudinal end of the front and rear leakage prevention sheet becomes free. Due to the contraction of the elastic elastic member, the non-fixed portion of the front and rear leakage prevention sheet is easily separated from the top sheet. In addition, when the front and rear leakage prevention sheet and the exterior sheet are fixed on the outer side in the width direction from the inner side portion of the three-dimensional gather, the interior body swells to the back side due to the contraction of the elastic elastic member disposed on the front and rear leakage prevention sheet. However, by making the longitudinal ends of the front and rear leakage prevention sheets free, the inner body can be prevented from bulging to the back side even when the elastic elastic member disposed on the front and rear leakage prevention sheet contracts.

<Invention of Claim 2>
A width direction outer side than the inner side portion of the three-dimensional gather, and a portion not fixed to the exterior sheet inside the longitudinal edge of the front and rear leakage prevention sheet, the longitudinal direction of the front and rear leakage prevention sheet The disposable diaper of Claim 1 with which the edge part is being fixed with the said exterior sheet | seat.

(Function and effect)
It has the same effect as that of the first aspect.

<Invention of Claim 3>
The disposable diaper according to claim 1 or 2, wherein the three-dimensional gather and the front / rear leakage prevention sheet are fastened in an intersecting region of the elastic expansion / contraction member of the three-dimensional gather and the elastic expansion / contraction member disposed on the front / rear leakage prevention sheet.

(Function and effect)
Due to the contraction of the elastic stretchable member disposed on the front and rear leakage prevention sheet, the three-dimensional gathering is likely to rise, and the non-fixed portion of the front and rear leakage prevention sheet is easily separated from the top sheet.

<Invention of Claim 4>
The three-dimensional gather and the front and rear leakage prevention sheet are fastened toward the crotch upper end of the three-dimensional gather from the intersection region of the elastic elastic member of the three-dimensional gather and the elastic elastic member disposed on the front and rear leakage prevention sheet. Item 3. A disposable diaper according to item 3.

(Function and effect)
By fastening the three-dimensional gather and the front and rear leakage prevention sheet in this way, it is possible to prevent excrement from leaking from the inside to the outside of the three-dimensional gather through the crotch upper end of the three-dimensional gather.

<Invention of Claim 5>
At least at the rear body end, the three-dimensional gather is wound up to the back side of at least the widthwise side edge of the absorber of the interior body,
The interior of the interior body is fixed to the exterior sheet at an intermediate portion in the width direction, and a portion of the interior body in the width direction and a portion of the solid gathering on the back side of the solid gather are not secured to the exterior sheet. The disposable diaper of any one of -4.

(Function and effect)
Due to the shrinkage of the elastic expansion and contraction member arranged on the front and rear leakage prevention sheet, the width direction side part of the interior body and the part that is not fixed to the exterior sheet of the part wound around the back side of the three-dimensional gathering easily rise to the use surface side Therefore, compared with the case where the portion is fixed to the exterior sheet, the non-fixed portion of the front and rear leakage prevention sheet is more easily separated from the surface sheet.

<Invention of Claim 6>
In the boundary position between the fixed part of the interior body and the exterior sheet, and the non-fixed part,
The disposable diaper of Claim 5 in which the separation part or thin part of the absorber is formed.

(Function and effect)
The unfixed portions on both sides of the interior body are likely to rise from the boundary position between the fixed portion of the interior body and the exterior sheet and the unfixed portion. Therefore, a space generated between the front and rear leakage prevention sheet and the surface sheet is increased, and the absorption pad can be easily inserted into the space.
In addition, when the separation part or thin part of an absorber is provided in the fixing | fixed part of an interior body and an exterior sheet, the effect which the non-fixed part of an interior body rises is not seen substantially.
In addition, in the case where a separating part or a thin part of the absorber is provided in the non-fixed part of the interior body and the exterior sheet,
Although bending occurs in the middle of the non-fixed part, a remarkable effect does not occur in the rise of the entire non-fixed part of the interior body.

<Invention of Claim 7>
The disposable diaper according to any one of claims 1 to 6, wherein the front-rear leakage prevention sheet is located on and intersects with the three-dimensional gather.

(Function and effect)
The front and rear leakage prevention sheets may be located on the three-dimensional gather and intersect.

<Invention of Claim 8>
The disposable diaper according to any one of claims 1 to 6, wherein the three-dimensional gather is located and intersects with the front and rear leakage prevention sheet.

(Function and effect)
A three-dimensional gather may be formed on the front and rear leakage prevention sheet and intersect.

<Invention of Claim 9>
The elasticity of the front / rear leakage prevention sheet along the width direction on the crotch side of the front / rear leakage prevention sheet, which is the inner side of the three-dimensional gathers provided on both side portions of the product in the width direction. The elastic member is fixed in the extended state,
The disposable body according to any one of claims 1 to 8, wherein the elastic elastic member gradually extends from a region intersecting with the elastic elastic member of a three-dimensional gather to the outside in the longitudinal direction and the crotch side of the front and rear leakage prevention sheet. Diapers.

(Function and effect)
Due to the contraction of the elastic expansion and contraction member arranged on the front and rear leakage prevention sheet, the three-dimensional gather is pulled to the outside in the longitudinal direction and the crotch side of the front and rear leakage prevention sheet. Thereby, a three-dimensional gather becomes easy to stand up and the non-fixed portion of the front and rear leakage prevention sheet is more easily separated from the top sheet.

<Invention of Claim 10>
Elasticity of the front and rear leakage prevention sheet along the width direction on the crotch side side of the front and rear leakage prevention sheet, which is outside in the width direction from the inner side portion of each three-dimensional gather provided on both sides of the product in the width direction. The elastic member is fixed in the extended state,
The disposable body according to any one of claims 1 to 8, wherein the elastic elastic member gradually extends from a region intersecting with the elastic elastic member of the three-dimensional gather to a longitudinally inner side and a crotch side of the front and rear leakage prevention sheet. Diapers.

(Function and effect)
When the absorbent pad is mounted, the elastic expansion and contraction member disposed on the front and rear leakage prevention sheet is contracted by the elastic expansion and contraction member disposed on the front and rear leakage prevention sheet, thereby preventing the front and rear leakage from the region where the elastic expansion and contraction member of the three-dimensional gather intersects. The three-dimensional gather is pulled inward in the longitudinal direction of the sheet and toward the crotch. Thereby, a three-dimensional gather becomes easy to stand up and the non-fixed portion of the front and rear leakage prevention sheet is more easily separated from the top sheet.
In addition, after the absorbent pad is mounted, in the stage of pulling up the disposable diaper toward the upper body side, the length of the front and rear leakage prevention sheet is determined from the region where the elastic expansion and contraction member arranged on the front and rear leakage prevention sheet intersects with the elastic expansion and contraction member of the three-dimensional gather. The elastic elastic member arranged on the inner side and the crotch side extends. As a result, both corners of the back side of the inserted absorbent pad are pressed by the elastic elastic member, and the inserted absorbent pad is not easily displaced.

  As described above, according to the present invention, there are advantages such that the absorbent pad can be easily inserted into the front and rear leakage prevention sheet.

It is the expanded view which looked at the disposable diaper concerning this invention from the skin surface side, and is the figure which fractured | ruptured a part of elastic elastic member. It is the expanded view which looked at the disposable diaper concerning this invention from the back surface side. It is the arrow line view which showed the BB cross section of the disposable diaper concerning this invention. It is the conventional disposable diaper, Comprising: It is the expanded view which showed the principal part for demonstrating the fixation area | region of an interior body and an exterior sheet | seat. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a developed view showing a main part for explaining a fastening region of an interior body and an exterior sheet, which is a disposable diaper according to the present invention. It is the expanded view which looked at the conventional disposable diaper from the skin surface side, Comprising: It is the figure which showed the principal part for demonstrating the front-and-rear leakage prevention sheet | seat, the exterior sheet | seat, and the fixation area | region of a three-dimensional gather. It is the expanded view which looked at the disposable diaper concerning this invention from the skin surface side, Comprising: It is the figure which showed the principal part for demonstrating the attachment area | region of a back-and-front leak prevention sheet | seat, an exterior sheet | seat, and a three-dimensional gather. It is the arrow view which showed the AA cross section of the disposable diaper concerning this invention, Comprising: It is the figure which showed the state which pulled the disposable diaper outward from the longitudinal direction both sides of the front-back leakage prevention sheet. It is sectional drawing which showed the state which cancelled | released the tension | pulling of FIG. It is another example of the arrow view which showed the AA cross section of the disposable diaper concerning this invention, Comprising: It is the figure which showed the state which pulled the disposable diaper outward from the longitudinal direction both sides of the front-back leakage prevention sheet. It is sectional drawing which showed the state which cancelled | released the tension | pulling of FIG. It is the expanded view which looked at the disposable diaper concerning this invention from the skin surface side, Comprising: It is the figure which showed the principal part for demonstrating arrangement | positioning of the front-back leakage prevention sheet elastic expansion-contraction member. It is the figure which showed the example from which a fixation area | region differs from FIG. It is the other example of the expanded view which looked at the disposable diaper concerning this invention from the skin surface side, Comprising: It is the figure which showed the principal part for demonstrating arrangement | positioning of the front-back leakage prevention sheet elastic expansion-contraction member. It is the other example of the expanded view which looked at the disposable diaper concerning this invention from the skin surface side, Comprising: It is the figure which showed the principal part for demonstrating arrangement | positioning of the front-back leakage prevention sheet elastic expansion-contraction member. In the disposable diaper concerning this invention, it is an expanded view which shows the case where a separation part or a thin part is provided. It is the arrow view which showed CC section of the disposable diaper which provided the separation part, Comprising: It is the figure which showed the state which pulled the disposable diaper outward from the longitudinal direction both sides of the front-back leakage prevention sheet. It is sectional drawing which showed the state which cancelled | released the tension | pulling of FIG. It is the arrow view which showed CC section of the disposable diaper which provided the thin part, Comprising: It is the figure which showed the state which pulled the disposable diaper outward from the longitudinal direction both sides of the front-back leakage prevention sheet. FIG. 20 is a cross-sectional view illustrating a state in which the tension in FIG. 19 is released. It is the perspective view which showed the state which mounted | wore the disposable diaper concerning this invention with the absorption pad.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  1 and 2 show a pants-type disposable diaper 1 according to the present invention. The disposable diaper 1 (hereinafter also simply referred to as a product) includes an exterior sheet 20 having a front body F and a back body B, an interior body 10 fixed and integrated on the inner surface of the exterior sheet 20, and an interior body 10. It has the surface sheet 11 fixed to the surface. The interior body 10 includes a liquid-impermeable back surface sheet 12 on the back surface side, and includes an absorber 13 on the skin surface side.

(Exterior sheet)
The exterior sheet 20 is a nonwoven fabric sheet having a two-layer structure composed of an upper layer nonwoven fabric 20A and a lower layer nonwoven fabric 20B. Various elastic members are arranged between the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B and between the nonwoven fabrics of the folded portion 20C formed by folding the lower layer nonwoven fabric 20B to the inner surface side at the waist opening edge, thereby imparting elasticity. The planar shape has a pseudo hourglass shape as a whole by concave leg-around lines 29 formed to form leg openings on both sides of the middle.

  The elastic portion of the exterior sheet 20 includes a waist elastic member 24 disposed in the vicinity of the waist opening, and a plurality of waists disposed along the width direction at intervals in the vertical direction on the front body F and the back body B. In the front body F and the back body B, each of the front body F and the back body B has a circumferential elastic member 25 and is separated from the waist elastic member group 25 by connecting side portions 21 and 22 that connect the front body F and the back body B in the width direction. While curving toward the opposite body side toward the center, it extends to a portion that overlaps both sides of the interior body 10 (or does not necessarily overlap, such as to the vicinity of both sides) and intersects each other A plurality of curved elastic members 26 and 28 are provided without being spaced apart from each other. In addition, in this exterior sheet 20, what is called a leg periphery elastic member substantially continuous along the leg periphery line 29 is not provided.

(Interior body)
The interior body 10 has a structure including a liquid-impermeable back side sheet 12 made of polyethylene or the like provided on the back side, and an absorber 13 on the skin side of the liquid-impermeable back side sheet 12. Absorbs and retains excreted fluid.

  The liquid-impermeable back sheet 12 that covers the back surface side (non-skin surface side) of the absorbent body 13 is a liquid-impermeable plastic sheet such as polyethylene or polypropylene. What has is used suitably. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there.

  Absorbent body 13 is a known one, for example, a pulp fiber stack, a filament aggregate such as cellulose acetate, or a non-woven fabric, mixed with a superabsorbent polymer as necessary, fixed, etc. In the example shown in the figure, a shape formed with a substantially rectangular planar shape is used, and the width dimension is a dimension width that does not give the wearer a feeling of goreness by hitting the crotch part. The absorbent body 13 can be packaged with a wrapping sheet 14 having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer. The shape of the absorber 13 may be rectangular, or may be an hourglass shape (constricted shape) in which the width of the crotch portion is narrower than the back side and the abdomen side.

(Surface sheet)
As the surface sheet 11 which covers the surface side (skin surface side) of the absorber 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the top sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid permeable top sheet 11 is wound around the side edge of the absorber 13 and extends to the back side of the absorber 13.

(Front and rear leakage prevention sheet)
As shown in FIGS. 1 and 3, the front and rear leakage prevention sheet covers the front and rear ends of the interior body 10 attached on the inner surface of the exterior sheet 20 and prevents leakage from the front and rear edges of the interior body 10. 2 is provided.

  1 will be described in more detail. The front leakage prevention sheet 2 covers the entire width direction from the inner surface of the folded portion 20C of the waist side end of the front body F to the position overlapping the front end of the interior body 10. It is extended. The back side of the front leakage prevention sheet 2 is bonded to the exterior sheet 20 and the top sheet 11. At this time, a slight non-adhesive portion may be provided over the entire width in the crotch side edge portion of the front leakage prevention sheet 2 (only the central portion may be provided). If this non-adhesive portion is provided, the adhesive erodes. In addition to not coming out, this part can be slightly lifted from the top sheet to function as a leak-proof wall.

  Further, in the illustrated form of FIG. 1, the rear leak prevention sheet 2 extends beyond the rear end portion of the interior body 10 from the position on the crotch side than the rear end portions of the top sheet 11 and the liquid-impermeable back side sheet 12. It extends to the crotch side of the interior body 10. Then, the end of the crotch side of the after-leakage prevention sheet 2 is not fixed to the top sheet 11, and the crotch side is bonded to the exterior sheet 20 with a hot melt adhesive or the like. Further, at the crotch side end portion of the post-leakage prevention sheet 2, the elastic elastic member 3 is fixed in the extended state along the width direction, and the elastic elastic member 3 is contracted in the used state, thereby preventing the post-leakage. The crotch side end of the seat 2 stands up.

  1 shows a case where the front leakage prevention sheet 2 and the rear leakage prevention sheet 2 are different, the form of the front leakage prevention sheet 2 in FIG. 1 is the same as that of the rear leakage prevention sheet 2 in FIG. Anyway. Further, the form of the front leakage prevention sheet 2 and the form of the rear leakage prevention sheet 2 in FIG. 1 may be reversed. The front and rear leakage prevention sheet 2 is shaped like the rear leakage prevention sheet 2 in FIG. 1 so that the front and rear end portions of the front and rear leakage prevention sheet 2 become free. Due to the contraction of the elastic member 3, the non-fixed portion of the front and rear leakage prevention sheet 2 is easily separated from the top sheet 11.

  In the illustrated form of FIG. 1, the front and rear leakage prevention sheet 2 has a rectangular shape, and the longitudinal direction of the front and rear leakage prevention sheet 2 corresponds to the width direction of the disposable diaper. Moreover, the direction which shows the crotch upper side and crotch side of the front-back leakage prevention sheet 2 corresponds to the front-back direction of the disposable diaper.

  In addition, when the front and rear leakage prevention sheet 2 is attached as a separate body as shown in the figure, there is an advantage that the degree of freedom of material selection is increased, but there are also disadvantages such as an increase in materials and manufacturing processes. Therefore, the folded portion 20C formed by folding the exterior sheet 20 on the inner surface of the diaper 1 may be extended to a portion overlapping the interior body 10 to form a portion equivalent to the above-described front and rear leakage prevention sheet 2.

  The material fibers constituting the front and rear leakage prevention sheet 2 may be synthetic fibers such as polyethylene or polypropylene such as olefin, polyester or amide, recycled fibers such as rayon or cupra, and natural fibers such as cotton. The nonwoven fabric obtained by an appropriate processing method such as the spunbond method, thermal bond method, melt blown method, needle punch method, etc. can be used. A good nonwoven fabric should be used. In addition, water repellent coated with silicone, paraffin metal, alkyl chromic water repellent, etc. to prevent urine permeation, to prevent fogging and to improve skin feel (dry feeling) It is desirable to use a treated nonwoven fabric.

  Moreover, as the elastic elastic member 3 provided in the front and rear leakage prevention sheet 2, a styrene rubber, an olefin rubber, a urethane rubber, an ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, etc. which are usually used are used. Can be used. Moreover, in order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the elongation is 150 to 350%, and the interval is 10.0 mm or less. The stretch rate is a value calculated by the length at stretch / natural length × 100, and instead of the thread-like elastic stretchable member, a tape-like elastic stretchable member having a certain width may be used.

(Three-dimensional gather)
The three-dimensional gather BS is formed by fixing the elastic elastic member 16 to the inner side portion of the three-dimensional gather sheet 15 in an expanded state. And when this elastic expansion-contraction member 16 shrink | contracts in a use state, the inner side part of solid gather BS stands up.

  It is preferable that solid gather BSs that fit around the legs are formed on both sides of the interior body 10. The three-dimensional gather BS is formed by the three-dimensional gather sheet 15. As the gathered nonwoven fabric, a nonwoven fabric made into a double sheet by folding is preferably used, and the side edge portion of the absorbent body 13 is further rolled up from the upper side and extended to the back surface side of the absorbent body 13 and bonded. More specifically, the three-dimensional gathered sheet 15 has a three-dimensional gather BS forming portion at the intermediate portion in the longitudinal direction of the disposable diaper 1, and a range from the intermediate portion in the width direction to the back side of the absorber 13 is a hot melt adhesive or the like. In the longitudinal front and rear end portions, the section from the intermediate portion in the width direction to the one side end edge is bonded in the range extending to the back side of the absorber 13, and the portion forming the three-dimensional gather BS is absorbed by the absorber. While being folded at the upper surface portion of 13, it is bonded by a hot melt adhesive or the like.

  A plurality of three-dimensional gather elastic elastic members 16 are disposed in the standing tip side portion inside the three-dimensional gather sheet 15 formed of the double sheet nonwoven fabric. The three-dimensional gather elastic elastic member 16 is for forming a three-dimensional gather BS by raising a non-woven fabric portion protruding from the side edge of the absorber 13 by an elastic elastic force in a product state.

  The liquid-impermeable back surface side sheet 12 enters the inside of the double sheet-shaped three-dimensional gather sheet 15, and constitutes a leak-proof wall on the lower end side of the three-dimensional gather BS. As the liquid-impermeable back side sheet 12, it is desirable to use an opaque sheet so that brown such as defecation and urine does not appear. As the opacification, a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used.

  As the elastic elastic member 16, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester that are usually used can be used. Moreover, in order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the elongation is 150 to 350%, and the interval is 10.0 mm or less. The stretch rate is a value calculated by the length at stretch / natural length × 100, and instead of the thread-like elastic stretchable member, a tape-like elastic stretchable member having a certain width may be used.

  In the same manner as the front and rear leakage prevention sheet 2, the material fibers constituting the three-dimensional gather sheet 15 are olefin-based, polyester-based, amide-based synthetic fibers such as polyethylene or polypropylene, regenerated fibers such as rayon and cupra, and cotton. Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a nonwoven fabric that suppresses the basis weight and has excellent air permeability. Furthermore, with respect to the three-dimensional gather sheet 15, in order to prevent the transmission of urine and the like, to prevent fogging, and to improve the touch to the skin (dry feeling), a silicon-based, paraffin metal-based, alkylchromic chromoid-based water repellent It is desirable to use a water-repellent non-woven fabric coated with such as.

(Fixing the interior body)
As described above, the three-dimensional gather BS is wound up to at least the back side of the inner body 10 around the side edge in the width direction of the absorbent body 13 at least at the rear body end of the product. At this time, the interior body 10 at the end of the rear body of the product is fixed to the exterior sheet 20 at the middle in the width direction, and the wrapping portion of the interior body 10 in the width direction side and the back side of the three-dimensional gather BS is provided. It is preferable not to be fixed to the exterior sheet 20. Due to the shrinkage of the elastic expansion and contraction member 3 disposed on the front and rear leakage prevention sheet 2, the width direction side portion of the interior body 10 and the portion that is not fixed to the exterior sheet 20 of the winding portion to the back side of the three-dimensional gather BS are used. This is because it becomes easier to rise to the surface side, and the non-fixed portion of the front-rear leakage preventing sheet 2 is more easily separated from the topsheet 11 than when the portion is fixed to the exterior sheet 20. In addition, as shown in FIG. 8, the winding part to the back surface side of the three-dimensional gather BS may be fixed to the exterior sheet 20, but as shown in FIG. There is an advantage that a separation area between the 2 and the three-dimensional gather BS becomes large.

(Fixing the front and rear leakage prevention sheet)
The three-dimensional gather BS and the front / rear leakage prevention sheet 2 intersect at the end in the back side direction of the three-dimensional gather BS, and the three-dimensional gather BS and the front / rear leakage prevention sheet 2 are fastened in the intersecting region. This fixing is performed by a known means such as hot melt bonding. And the area | region which is not fixed to the said exterior | packing sheet 20 is provided in the longitudinal direction edge part of the said front-back leakage prevention sheet 2 in the width direction outer side from the inner side part of the solid gather BS. About this unfixed area | region, the form where all the area | regions of the longitudinal direction edge part of the front-back leakage prevention sheet 2 may not be fixed may be sufficient, and one part area | region is among the longitudinal direction edge parts of the front-back leakage prevention sheet 2 May be fixed, and other regions may not be fixed. Thus, in the width direction outer side from the inner side part of the three-dimensional gather BS, the longitudinal direction end part of the front and rear leakage prevention sheet 2 is provided by providing the region where the longitudinal direction end part of the front and rear leakage prevention sheet 2 is not fixed to the exterior sheet 20. Therefore, the non-fixed portion of the front / rear leakage prevention sheet 2 is easily separated from the topsheet 11 by contraction of the elastic elastic member 3 disposed on the front / rear leakage prevention sheet 2. Further, when the front and rear leakage prevention sheet 2 and the exterior sheet 20 are fixed on the outer side in the width direction from the inner side portion of the three-dimensional gather BS, the interior body 10 is contracted by the elastic expansion and contraction member 3 disposed on the front and rear leakage prevention sheet 2. However, even if the elastic elastic member 3 disposed on the front / rear leakage prevention sheet 2 contracts by making the longitudinal end portion of the front / rear leakage prevention sheet 2 free, the interior body 10 remains on the back side. Can be prevented from swelling.

  In addition, about the length of the longitudinal direction of the front-back leakage prevention sheet 2, you may make it extend to the width direction outer side rather than the solid gather BS, and you may make it not extend. In the case of extension, the entire extension region of the front and rear leakage prevention sheet 2 is not fixed to the exterior sheet 20 or a part of the extended region is not fixed to the exterior sheet 20.

  For example, a portion that is outside in the width direction from the inner side portion of the three-dimensional gather BS and inside the longitudinal edge of the front and rear leakage prevention sheet 2 is not fixed to the exterior sheet 20, and the front and rear leakage prevention sheet The longitudinal edge portion 2 may be fixed to the exterior sheet 20. In this case, compared with the case where the longitudinal edge portion of the front and rear leakage prevention sheet 2 is not fixed to the exterior sheet 20, the non-fixed portion of the front and rear leakage prevention sheet 2 is less likely to be separated from the topsheet 11. Since the portion that is not fixed to the exterior sheet 20 is provided on the outer side in the width direction from the inner side of the front side and the inner side of the longitudinal edge of the front and rear leakage prevention sheet 2, as shown in FIG. The non-fixed portion of the front and rear leakage prevention sheet 2 is more easily separated from the top sheet 11 than a normal product.

  In addition, it is more preferable to provide the area | region fixed to the exterior | packing sheet 20 among the said extension parts of the front-back leakage prevention sheet 2 in the longitudinal direction edge side of the front-back leakage prevention sheet 2. FIG. Since the region where the inner portion is not fixed is wider than the inner side portion of the three-dimensional gather BS, and the inner portion of the front and rear leakage prevention sheet 2 is not fixed, the inner side portion of the three-dimensional gather BS is wider in the width direction. This is because the non-fixed portion of the front-rear leakage prevention sheet 2 is easily separated from the top sheet 11.

  In addition, a region to be fixed to the exterior sheet 20 in the extended portion of the front and rear leakage prevention sheet 2 may be provided closer to the inner side in the longitudinal direction of the front and rear leakage prevention sheet 2. Moreover, you may provide the area | region fixed to the exterior sheet | seat 20 among the said extension parts of the back-and-front leak prevention sheet 2 along the longitudinal direction of the back-and-front leak prevention sheet 2 with a predetermined space | interval. Furthermore, you may provide widely the area | region fixed to the exterior sheet | seat 20 among the said extension parts of the front-and-back leak prevention sheet 2 along the longitudinal direction of the front-and-back leak prevention sheet 2. FIG. However, in these cases, since the region that is outside in the width direction from the inner side portion of the three-dimensional gather BS and the inner portion of the longitudinal edge of the front and rear leakage prevention sheet 2 is not fixed is narrow, Since the non-fixed portion of the front and rear leakage prevention sheet 2 on the inner side in the width direction from the inner side portion is difficult to be separated from the top sheet 11, it is not preferable.

  Further, in the region where the elastic expansion / contraction member 16 of the three-dimensional gather BS and the elastic expansion / contraction member 3 disposed on the front / rear leakage prevention sheet 2 intersect, the three-dimensional gather BS and the front / rear leakage prevention sheet 2 are fastened, and longer than the intersection region. It is preferable not to fix the front and rear leakage prevention sheet 2 and the three-dimensional gather BS on the outer side in the direction. By reducing the fastening area between the three-dimensional gather BS and the front and rear leakage prevention sheet 2, the three-dimensional gather BS is likely to rise, and the non-fixed portion of the front and rear leakage prevention sheet 2 is easily separated from the topsheet 11.

  Also, the three-dimensional gather BS and the front-rear direction from the intersection region of the elastic elastic member 16 of the three-dimensional gather BS and the elastic elastic member 3 disposed on the front-rear leakage prevention sheet 2 toward the front-rear direction end of the back of the three-dimensional gather BS It is preferable to fix the leakage preventing sheet 2. By fixing the three-dimensional gather BS and the front and rear leakage prevention sheet 2 in this way, the excrement is prevented from leaking from the inside to the outside of the three-dimensional gather BS through the longitudinal end of the back of the three-dimensional gather BS. Can do.

  It should be noted that the front and rear leakage prevention sheet 2 may be positioned and intersected with the three-dimensional gather BS, or the front and rear leakage prevention sheet 2 may be positioned and intersected with the three-dimensional gather BS.

(Arrangement of front and rear leakage prevention sheet elastic expansion and contraction member)
As shown in FIG. 12 and FIG. 13, the elastic stretchable member 3 arranged on the front / rear leakage prevention sheet 2 is arranged along the width direction of the product at the crotch side of the front / rear leakage prevention sheet 2. You may arrange | position so that it may extend substantially linearly from the one end side of 2 to the other end side.

  Further, as shown in FIG. 14, the inner side of each three-dimensional gather BS provided on both sides of the product in the width direction, the inner side in the width direction, and the product on the crotch side of the front and rear leakage prevention sheet 2 The elastic expansion / contraction member 3 of the front / rear leakage prevention sheet 2 is fixed in an expanded state along the width direction of the front and rear leakage prevention sheet gradually from the region where the elastic expansion / contraction member 3 and the elastic expansion / contraction member 16 of the three-dimensional gather BS intersect. You may arrange | position so that it may extend to the longitudinal direction outer side of 2 and the crotch side. In this arrangement, when the elastic elastic member 3 disposed on the front / rear leakage prevention sheet 2 contracts, the three-dimensional gather BS is pulled outward in the longitudinal direction of the front / rear leakage prevention sheet 2 and on the crotch side. Accordingly, there is an advantage that the three-dimensional gather BS easily rises and the non-fixed portion of the front and rear leakage prevention sheet 2 is more easily separated from the top sheet 11.

  Further, as shown in FIG. 15, the product is located on the crotch side of the front and rear leakage prevention sheet 2 that is on the outer side in the width direction than the inner side of each three-dimensional gather BS provided on both sides in the width direction of the product. The elastic expansion / contraction member 3 of the front / rear leakage prevention sheet 2 is fixed in an extended state along the width direction of the front and rear leakage prevention sheet 2 gradually from the region intersecting the elastic expansion / contraction member 3 and the elastic expansion / contraction member 16 of the three-dimensional gather BS. You may arrange | position so that it may extend in the longitudinal direction inner side and crotch upper side.

  With such an arrangement, the elastic elastic member 3 disposed on the front / rear leakage prevention sheet 2 contracts when the absorbent pad is mounted, and the elastic expansion / contraction member 3 disposed on the front / rear leakage prevention sheet 2 and the three-dimensional gather BS The three-dimensional gather BS is pulled from the region where the elastic elastic members 16 intersect to the longitudinally inner side and the crotch side of the front and rear leakage prevention sheet 2. Accordingly, there is an advantage that the three-dimensional gather BS easily rises and the non-fixed portion of the front and rear leakage prevention sheet 2 is more easily separated from the top sheet 11.

  In addition, after the absorbent pad is mounted, in the stage where the disposable diaper is pulled up to the upper body side, from the region where the elastic elastic member 3 arranged on the front and rear leakage prevention sheet 2 and the elastic elastic member 16 of the three-dimensional gather BS intersect. The elastic elastic member 3 disposed on the inner side in the longitudinal direction and on the crotch side of the front and rear leakage prevention sheet 2 extends. As a result, there is an advantage that both corners on the back body side of the inserted absorbent pad are pressed by the elastic elastic member 3 and the inserted absorbent pad is hardly displaced.

(Formation of spaced part or thin part)
In addition, the absorber 13 can be provided with a separation portion 32 and a thin portion 33. The separation portion 32 is a portion where the absorber 13 is separated, and may be formed by a slit, or may be wider than the slit. The thin portion 33 refers to a portion where the absorber 13 is thin, and can be formed by embossing or the like. In the illustrated embodiment, an example in which the thin portion 33 is formed by forming depressions from both the skin surface side and the back surface side of the absorbent body 13 is shown, but the present invention is not limited to such a form, and any of the skin surface side and the back surface side is shown. You may make it form the thin part 33 by making a dent from either surface.

  The position where the separation portion 32 and the thin portion 33 are provided is preferably a boundary position L1 between the fixed portion X of the interior body 10 and the exterior sheet 20 and the non-fixed portion Y. By providing the separation portion 32 and the thin portion 33 at such a boundary position L1, the non-fixed portions Y on both side portions of the interior body 10 can easily rise from the boundary position L1. Therefore, the space generated between the front and rear leakage prevention sheet 2 and the top sheet 11 is increased, and the absorption pad can be easily inserted into the space.

  In addition, when the separation | spacing part 32 or the thin part 33 of the absorber 13 is provided in the fixing | fixed part X of the interior body 10 and the exterior sheet 20, the effect which the non-fixed part Y of the interior body 10 rises is not seen substantially. . In addition, when the separation portion 32 or the thin portion 33 of the absorber 13 is provided in the non-fixed portion Y of the interior body 10 and the exterior sheet 20, bending occurs in the middle of the non-fixed portion Y. There is no significant effect on the rise of the entire fixed portion Y.

  1: Disposable diaper, 2: Front and rear leakage prevention sheet, 3: Front and rear leakage prevention sheet elastic elastic member, 4: Hot melt adhesive pattern, 10: Interior body, 11: Top sheet, 12: Liquid-impermeable back side sheet, 13 : Absorber, 14: Packaging sheet, 15: Three-dimensional gather sheet, 16: Three-dimensional gather elastic elastic member, 20: Exterior sheet, 21/22: Side joint edge, 24: Waist elastic elastic member, 25: Hip elastic Stretchable member, 26: dorsal curved elastic stretchable member, 28: ventral curved elastic stretchable member, 29: leg line, 30: absorbent pad, 31: absorbent pad gather, 32: separating part, 33: thin part, 50: Rear presser sheet, 60: front presser sheet, F: front body, B: rear body, M: non-fixed area, N: fixed area, X: fixed part, Y: non-fixed part, L1: fixed part and non-fixed Fixed part boundary, L2: non- Widthwise outer boundary of tough, BS: standing gathers

Claims (10)

In a disposable diaper provided with an exterior sheet having a front body and a back body, an interior body including an absorbent body fixed to the inner surface of the exterior sheet, and a surface sheet,
In the back body end, along the width direction, the crotch side is provided with a front and back leakage prevention sheet that is not fixed to the top sheet,
On the crotch side of the front and rear leakage prevention sheet, the crotch side is formed upright by an elastic elastic member fixed in an extended state along the width direction.
Three-dimensional gathers are provided on both sides in the width direction of the product so that the inner side part stands up in the use state by an elastic stretch member fixed in a stretched state along the front-rear direction and on the gather sheet.
The three-dimensional gather and the front and rear leakage prevention sheet intersect,
Three-dimensional gathers and front and rear leakage prevention sheets are fastened in the intersection region,
On the outer side in the width direction from the inner side part of the three-dimensional gather, the longitudinal direction end of the front and rear leakage prevention sheet is not fixed to the exterior sheet,
A disposable diaper characterized by that.   A width direction outer side than the inner side portion of the three-dimensional gather, and a portion not fixed to the exterior sheet inside the longitudinal edge of the front and rear leakage prevention sheet, the longitudinal direction of the front and rear leakage prevention sheet The disposable diaper of Claim 1 with which the edge part is being fixed with the said exterior sheet | seat.   The disposable diaper according to claim 1 or 2, wherein the three-dimensional gather and the front / rear leakage prevention sheet are fastened in an intersecting region of the elastic expansion / contraction member of the three-dimensional gather and the elastic expansion / contraction member disposed on the front / rear leakage prevention sheet.   The three-dimensional gather and the front and rear leakage prevention sheet are fastened toward the crotch upper end of the three-dimensional gather from the intersection region of the elastic elastic member of the three-dimensional gather and the elastic elastic member disposed on the front and rear leakage prevention sheet. Item 3. A disposable diaper according to item 3. At least at the rear body end, the three-dimensional gather is wound up to the back side of at least the widthwise side edge of the absorber of the interior body,
The interior of the interior body is fixed to the exterior sheet at an intermediate portion in the width direction, and a portion of the interior body in the width direction and a portion of the solid gathering on the back side of the solid gather are not secured to the exterior sheet. The disposable diaper of any one of -4. In the boundary position between the fixed part of the interior body and the exterior sheet, and the non-fixed part,
The disposable diaper of Claim 5 in which the separation part or thin part of the absorber is formed.   The disposable diaper according to any one of claims 1 to 6, wherein the front-rear leakage prevention sheet is located on and intersects with the three-dimensional gather.   The disposable diaper according to any one of claims 1 to 6, wherein the three-dimensional gather is located and intersects with the front and rear leakage prevention sheet. The elasticity of the front / rear leakage prevention sheet along the width direction on the crotch side of the front / rear leakage prevention sheet, which is the inner side of the three-dimensional gathers provided on both side portions of the product in the width direction. The elastic member is fixed in the extended state,
The disposable body according to any one of claims 1 to 8, wherein the elastic elastic member gradually extends from a region intersecting with the elastic elastic member of a three-dimensional gather to the outside in the longitudinal direction and the crotch side of the front and rear leakage prevention sheet. Diapers. Elasticity of the front and rear leakage prevention sheet along the width direction on the crotch side side of the front and rear leakage prevention sheet, which is outside in the width direction from the inner side portion of each three-dimensional gather provided on both sides of the product in the width direction. The elastic member is fixed in the extended state,
The disposable body according to any one of claims 1 to 8, wherein the elastic elastic member gradually extends from a region intersecting with the elastic elastic member of the three-dimensional gather to a longitudinally inner side and a crotch side of the front and rear leakage prevention sheet. Diapers.

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