JP2009207565A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a pocket which can be used easily without the need of adding or changing materials and manufacture processes. <P>SOLUTION: Of the overlap part of an interior body 200 and an external sheet 12 in a back side part B, a width direction intermediate part 201 from a waist side end edge to a prescribed position on the crotch side in the interior body 200 is not bonded or peelably-bonded to the exterior sheet 12. The part between the interior body 200 and the exterior sheet 12 at the non-bonded or peelably-bonded part 201 serves as a pocket 300 opened at the waist side end edge of the interior body 200. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disposable diaper.

Many disposable diapers have a main body formed so that an absorbent body is interposed between a liquid-permeable surface sheet and a liquid-impermeable sheet, and is formed so as to cover from the back side through the crotch part to the abdomen side. is doing. Further, in order to improve the appearance and feel of the outer surface of the product, an exterior sheet formed so as to cover the waistline is often attached to at least the front and rear waist end portions of the outer surface of the main body. And in the so-called fastening type (tape type), fastening tapes are provided on both sides on the back side, and these fastening tapes are attached to the outer surface of the abdomen so that they can be attached to the pants type. Then, the both sides on the back side and the both sides on the abdomen are joined together, and a waist opening and a leg opening are formed in advance, and wearing is performed by pulling the leg opening through the leg to the waist.
On the other hand, in such disposable diapers, it has been proposed to provide a pocket by attaching a sheet to the outer surface of the diaper for the purpose of improving the convenience of the user (see Patent Document 1).
JP 2004-254862 A

However, this prior art pocket has a problem that it is necessary to affix a pocket forming sheet to the outer surface of the diaper, and it is necessary to add or change materials and manufacturing processes.
Therefore, a main problem of the present invention is to form a pocket that can be easily used without requiring addition or change of materials and manufacturing processes.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
An absorbent body is interposed between the liquid-permeable surface sheet and the liquid-impermeable sheet, and a main body formed so as to cover from the back side through the crotch to the abdomen, and on the outer surface of the main body In a disposable diaper provided with at least a front and back waist side ends and an exterior sheet formed to cover at least the waistline,
Of the overlapping part of the main body and the exterior sheet on at least one of the ventral side and the back side, the intermediate portion in the width direction from the waist side end edge to the predetermined position on the crotch side in the main body is not joined to the exterior sheet Or it is joined in a peelable manner,
The space between the main body portion and the exterior sheet in the non-bonded or releasably bonded portion is configured to be a pocket that opens to the waist side edge of the main body portion.
A disposable diaper characterized by that.

(Function and effect)
In the present invention, since the space between the back surface of the main body and the inner surface of the exterior sheet is formed as a pocket, it is not necessary to add or change materials and manufacturing processes. Moreover, since it opens to the waist side, since the user can pull away the waist part of a diaper from a body and can take in / out an object to / from a pocket through the separated part, use becomes easy. Furthermore, if a fragrance is put in the pocket, when the diaper is separated from the body, the fragrance is emitted from the opening of the pocket at once, so that the odor of the excrement can be effectively canceled.

  And when not using a pocket, it can be used with the same external appearance and usability as a conventional diaper. In particular, when the pocket forming part of the main body part is releasably bonded to the exterior sheet, if the pocket is not opened, it can be used substantially unchanged from the conventional diaper without opening the pocket However, it is preferable because it can be used as a pocket when necessary.

<Invention of Claim 2>
The liquid-impermeable sheet has moisture permeability, and at least a part of the liquid-impermeable sheet is exposed on the inner surface of the pocket, and the front-rear direction defined in JIS P 8116 of the liquid-impermeable sheet The disposable diaper according to claim 1, wherein the tear strength is 150 gf or more.

(Function and effect)
In the present invention, since the space between the back surface of the main body and the inner surface of the exterior sheet is formed as a pocket, the liquid-impermeable sheet is exposed on the inner surface of the pocket as it is. However, as described in this section, it is preferable to use a high-strength material as the liquid-impermeable sheet because the liquid-impermeable sheet is not torn during use or when a peelable joint is peeled off.

<Invention of Claim 3>
The liquid-impermeable sheet is made of a plastic film having moisture permeability, and at least a part of the liquid-impermeable sheet is exposed on the inner surface of the pocket, and at least a part of the exposed part is formed by a breathable reinforcing sheet. The disposable diaper according to claim 1 or 2, wherein the disposable diaper is lined.

(Function and effect)
In the field of disposable diapers, plastic films with moisture permeability are widely used as liquid-impervious sheets, but such sheets are weak in tearing in the front-rear direction, so when peeling peelable joints during use There is a risk of breaking. However, simply increasing the strength of the liquid-impermeable sheet decreases the moisture permeability of the liquid-impermeable sheet. Therefore, in order to supplement the strength of the liquid-impermeable sheet, it is also a preferable form to line with a breathable reinforcing sheet.

<Invention of Claim 4>
The disposable diaper according to claim 3, wherein the breathable reinforcing sheet is a designed design sheet, and the design is visible from the outer surface through the exterior sheet.

(Function and effect)
One of the sheets disposed between the exterior sheet and the main body is a design sheet. The invention described in this section uses this design sheet as a breathable reinforcing sheet, and is preferable in that the inner surface of the pocket can be reinforced without requiring addition or change of materials and manufacturing processes. is there.

<Invention of Claim 5>
The exterior sheet has an outer surface side portion and a folded portion folded inward from the waist side edge of the outer surface side portion,
In the folded portion, the crotch side edge is located on the crotch side from the waist side end edge of the main body,
The disposable part according to any one of claims 1 to 4, wherein a portion of the folded portion that overlaps the main body portion is located between the main body portion and the exterior sheet and is fixed to the outer surface side portion. Diapers.

(Function and effect)
The structure in which the exterior sheet is folded inward at the waist side edge eliminates the cut end of the material at the waist side edge and improves the touch. Further, when the folded portion is put on the body side of the waist side edge portion of the main body portion and fixed, there is an advantage that the skin of the waist side edge portion of the main body portion can be softened. Therefore, such a structure has been conventionally employed (especially often used in pants-type disposable diapers).

  However, in the case of the present invention, since the pocket opens at the waist side edge of the main body, even if the folded portion of the exterior sheet is provided, it is necessary that the folded portion does not block the opening of the pocket. In this case, the crotch side portion that overlaps the main body portion of the folded portion may be simply unfixed, but if this non-fixed portion becomes a certain size, it may flutter and deteriorate the feeling of wearing. Therefore, in order to prevent this, when the crotch side edge of the folded portion is positioned on the crotch side with respect to the waist side end edge of the main body portion, the portion overlapping the main body portion is interposed between the main body portion and the exterior sheet. It is also a preferred form that it is positioned and fixed to the outer surface side portion.

<Invention of Claim 6>
The exterior sheet has an outer surface side portion and a folded portion folded inward from the waist side edge of the outer surface side portion,
The crotch side edge of the folded portion is located on the waist side of the main body part or located on the waist side, and is fixed to the inner surface of the outer surface side part. The disposable diaper of any one of 4.

(Function and effect)
As described above, in the case of the present invention, since the pocket opens at the waist side edge of the main body, even if the folded portion of the exterior sheet is provided, it is necessary not to block the opening of the pocket by the folded portion. . Therefore, as described in this section, it is also a preferable form that the folded portion is shortened and fixed to the outer surface side portion at a position that does not reach the opening of the pocket.

<Invention of Claim 7>
The exterior sheet has an outer surface side portion and a folded portion folded inward from the waist side edge of the outer surface side portion,
The folded portion, the crotch side edge is located on the crotch side than the waist side end edge of the main body part, and is covered on the inner surface side of the main body part,
The crotch side end portion of the folded portion is not fixed at least partially to the main body portion, and an elastic expansion / contraction member is fixed to the non-fixed portion in a state of extending along the width direction. The disposable diaper of any one of -4.

(Function and effect)
As described above, in the case of the present invention, since the pocket opens at the waist side edge of the main body, even if the folded portion of the exterior sheet is provided, it is necessary not to block the opening of the pocket by the folded portion. . In this case, at least the crotch portion that overlaps at least the main body portion of the folded portion may be unfixed, but if this non-fixed portion becomes a certain size, there is a possibility that it will flutter and cause a feeling of wearing. On the other hand, when the folded portion is configured as described in this section, the crotch side end portion of the folded portion contracts due to the contraction of the elastic elastic member and does not open. In addition, the crotch side end portion of the folded portion covers the pocket opening, but can be expanded and contracted by the elastic elastic member, so that the folded portion can be stretched and the pocket opening is easily exposed. . Further, since the folded portion automatically returns to the original position due to the contraction of the elastic elastic member, there is an advantage that it is not necessary to prepare the folded portion.

<Invention of Claim 8>
The waist side edge part of the said main-body part is formed by the fusion | melting joining of the sheet-like material which does not have the said absorber and contains the said liquid-permeable surface sheet and a liquid-impermeable sheet | seat. The disposable diaper of any one of these.

(Function and effect)
In the field of disposable diapers, it is common to include superabsorbent polymer particles in the absorbent body. Moreover, the structure by which the waist side edge part of the main-body part is comprised by joining to the edge part of a liquid-permeable surface sheet and the edge part of a liquid-impermeable sheet is common. However, when the present invention is applied to such a structure, the waist side end edge of the main body part is exposed as an opening edge of the pocket. May leak. Therefore, as described in this section, the sheet-like material on the waist side edge of the main body is joined by fusion means such as embossing, making it difficult to peel off the material on the waist side edge of the main body. It is preferable to prevent leakage of the superabsorbent polymer particles from.

<Invention of Claim 9>
The absorbent body includes superabsorbent polymer particles, and a packaging sheet is wrapped around and wrapped around the front and back surfaces and both side surfaces, and the waist side edge portion of the tubular packaging sheet absorbs the absorption. It protrudes from the waist side edge part of the body, this protrusion part is crushed in the front and back direction and joined, and this joining strength is 500 to 2000 gf / 25 mm. The disposable diaper of any one of Claims.

(Function and effect)
The above-mentioned problem that the superabsorbent polymer particles leak from between the materials on the waist side edge of the main body is provided with a protruding portion from the absorber on the waist side edge of the packaging sheet, and the waist side edge of the packaging sheet. It can also be solved by making the joint strength of the part much stronger than before. The bond strength (180 degree peel strength) can be measured using a tensile tester (for example, AOUTGRAPHAGS-G100N manufactured by SHIMADZU). The measurement method is to prepare a sample cut to 25 mm x 130 mm, peel off 5 cm in the longitudinal direction in advance to form a tear-off port, and at 20 ° C. under conditions of 50 mm between chucks and a pulling speed of 300 mm / min. A length of 30 mm is peeled off from the above-mentioned peeling port with a tensile tester and measured. Two types of samples are prepared, one whose longitudinal direction is the product vertical direction and one whose longitudinal direction is the product horizontal direction, and the values measured for each are averaged to obtain a measured value.

  As described above, there is an advantage that a pocket that can be easily used can be formed without requiring addition or change of materials and manufacturing processes.

  Below, the basic structure example of a pants-type disposable paper diaper is demonstrated first, and the characteristic part is demonstrated next. In each figure, “front-rear direction” means the direction connecting the ventral side (front side) and the back side (rear side), “width direction” means the direction orthogonal to the front-rear direction (left-right direction), “ “Up and down direction” means the wearing state of the diaper, that is, the direction orthogonal to the waistline direction when the diaper is folded in two at the crotch part so that the both sides of the front body and the back part of the diaper overlap each other, in other words It means the direction connecting the waist opening WO side and the crotch part side.

<Basic structure example of pants-type disposable diapers>
FIGS. 1-10 has shown an example of the underpants type disposable diaper, and this underpants type disposable diaper is the exterior sheet 12 which makes a product outer surface (back surface), and the interior body 200 affixed on the inner surface of the exterior sheet, It is comprised from. The interior body 200 is a part that absorbs and holds excrement such as urine, and the exterior sheet 12 is a part that is worn by the wearer. In addition, the dot pattern part in sectional drawing has shown the junction part which joins each structural member, and is formed by solid, beads, curtains, summits, spiral application, etc., such as a hot-melt-adhesive.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the interior body 200 includes a surface sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorption element 50 interposed therebetween. Yes, it corresponds to the main body of the present invention. Reference numeral 40 denotes an intermediate sheet (second sheet) provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorbent element 50. Shows barrier cuffs 60 that stand on the body side and are provided on both sides of the interior body 200 in order to prevent excrement from leaking to both sides of the interior body 200.

(Surface sheet)
The surface sheet 30 has a property of transmitting liquid, and examples thereof include a porous or non-porous nonwoven fabric and a porous plastic sheet. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, if flexibility and drapeability are required, the spunbond method and spunlace method are preferable. If bulkiness and softness are required, the air-through method, point bond method, and thermal bond method are preferable processing methods. .

  Further, the top sheet 30 may be composed of one sheet or may be composed of a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

  When the barrier cuff 60 is provided, both side portions of the top sheet 30 pass between the liquid-impermeable sheet 11 and the barrier cuff 60 to the back side of the absorbent element 50 to prevent liquid penetration. It is preferable to adhere to the impermeable sheet 11 and the barrier cuff 60 with a hot melt adhesive or the like.

(Intermediate sheet)
An intermediate sheet (also referred to as “second sheet”) 40 having a higher liquid permeation rate than the top sheet 30 can be provided to quickly transfer the liquid that has passed through the top sheet 30 to the absorber. This intermediate sheet 40 not only improves the absorption performance by the absorbent by quickly transferring the liquid to the absorbent body, but also prevents the “reversed” phenomenon of the absorbed liquid from the absorbent body, so that the top sheet 30 is always dried. It can be made into the state which carried out. The intermediate sheet 40 can be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace, spunbond, SMS, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{20~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw fiber of the nonwoven fabric is preferably 2.2 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use an eccentric fiber, a hollow fiber, or an eccentric and hollow fiber that does not have a core at the center as the mixed fiber of all or part of the raw fiber.

  The intermediate sheet 40 in the form shown in the figure is arranged in the center shorter than the width of the absorber 56, but may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the length of the absorbent body 56 or may be within a short length range centered on the region that receives the liquid.

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric provided with a plastic film on the surface of the nonwoven fabric, or a plastic film For example, a laminated sheet in which a nonwoven fabric or the like is laminated and bonded to each other can be exemplified. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impervious and moisture-permeable material that has been preferred in recent years from the viewpoint of preventing stuffiness. Specifically, the moisture permeability measured according to JIS Z 0208 is 3000 to 12000 g / m ² · 24 hr, preferably 6000 to 12000 g / m ² · 24 hr, more preferably 8000 to 12000 g / m ² · 24 hr. It is preferable to use a liquid-impermeable sheet having wettability. As a plastic film having moisture permeability, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching in a uniaxial or biaxial direction. Is widely used. In addition, non-woven fabric using micro-denier fibers, leakproof reinforcement by reducing the voids of the fibers by applying heat or pressure, and methods such as applying a superabsorbent resin or hydrophobic resin or water repellent Thus, a sheet that is liquid-impermeable without using a plastic film can also be used as the liquid-impermeable sheet 11.

  The liquid-impermeable sheet 11 is preferably extended around both sides of the absorbent element 50 to both sides of the side surface 30 of the absorbent element 50 in order to improve leakage prevention. The width of this extended portion is suitably about 5 to 20 mm on each of the left and right sides.

  Further, the inner surface or the outer surface of the liquid-impermeable sheet 11 may be designed by printing or coloring. Furthermore, an excretion indicator 80 whose color is changed by absorption of the liquid can be provided inside the liquid-impermeable sheet 11.

(Design sheet)
A design sheet 25 that is designed by printing or coloring can be provided between the liquid-impermeable sheet 11 and the exterior sheet 12. The design of the design sheet 25 is preferably about 20 to 60 g / m ² so that the total weight of the exterior sheet 12 is visually recognized from the outer surface of the product through the exterior sheet 12, and is defined in JIS K 7105 of the exterior sheet 12. The total light transmittance is preferably 40% or more, particularly 50% or more. Moreover, when the elongate elastic expansion-contraction members 15-19 mentioned later cross the design sheet 25, when using the rubber | gum containing titanium oxide as the elongate elastic expansion-contraction members 15-19, content of titanium oxide is low ( It is preferable to use those not containing titanium oxide (for example, 2% or less). A plastic film, a nonwoven fabric, paper, etc. can be used for the base material of the design sheet 25. When using a plastic film, it is desirable to have moisture permeability in order to prevent stuffiness. Nonwoven fabrics and paper are preferable because they have moisture permeability. However, when nonwoven fabrics are used, it is necessary to use ones that have high smoothness and are easy to print, and when papers are used, ones that are strong and difficult to bleed ink. The design sheet 25 may be provided between the layers of the exterior sheet 12.

(Barrier cuffs)
The barrier cuff 60 is a belt-like member that extends over the entire front and rear direction along both side portions of the interior body 200, blocks urine and soft stool that move laterally along the top sheet 30, and prevents side leakage. It is provided for this purpose. The barrier cuff 60 of the present embodiment is provided so as to stand up from the side portion of the interior body 200, the base side portion stands up obliquely toward the center in the width direction, and the tip side portion from the intermediate portion has a width. It stands up diagonally outward in the direction.

  More specifically, the barrier cuff 60 is formed by folding a belt-like barrier sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 and folding it in two in the width direction. In addition, a plurality of elongated elastic elastic members 63 are fixed along the longitudinal direction at intervals in the width direction. An end of the barrier cuff 60 opposite to the folded portion in the width direction is an attachment portion 65 fixed to the back surface of the side edge of the interior body 200, and portions other than the attachment portion 65 protrude from the attachment portion 65. It is set as the protrusion part 66 (part by the side of a folding | turning part). Further, both end portions in the front-rear direction of the protruding portion 66 extend from the mounting portion 65 to the side surface of the topsheet 30 through the side portion of the interior body 200 and are hot-melted to the side surface of the topsheet 30. The base side portion is fixed to the front and rear fixing portion 67 by an adhesive or heat seal, and the tip side portion is folded back outward in the width direction from the tip of the base side portion and fixed to the base side portion. An intermediate part in the front-rear direction of the protruding part is an unfixed free part (inner free part), and an elongated elastic member 63 extending in the front-rear direction is fixed to the free part in an extended state.

The barrier sheet 62 is made of a spunbond nonwoven fabric (SS, SSS, etc.), an SMS nonwoven fabric (SMS, SSMMS, etc.), a melt-blown nonwoven fabric with excellent uniformity and concealment, and water-repellent with silicon as necessary. A treated product can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m ² . As the elongated elastic elastic member 63, rubber thread or the like can be used. When spandex thread rubber is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate at the time of fixation is preferably 150 to 350%, more preferably 200 to 300%. Further, as shown in the drawing, a waterproof film can be interposed between the barrier sheets folded in two.

  The number of the elongated elastic stretch members 63 provided in the free part of the barrier cuff 60 is preferably 2-6, and more preferably 3-5. The arrangement interval 60d is suitably 3 to 10 mm. If comprised in this way, in the range which has arrange | positioned the elongate elastic expansion-contraction member 63, it will become easy to contact | abut with respect to skin. The elongated elastic elastic member 63 may be disposed not only at the distal end side but also at the base side.

  The fixing target of the attachment portion 65 of the barrier cuff 60 can be an appropriate member such as the top sheet 30, the liquid-impermeable sheet 11, the absorbent element 50 in the interior body 200.

  In the barrier cuff 60 thus configured, the contraction force of the elongated elastic elastic member 63 acts to bring the both ends in the front-rear direction close to each other, but the both ends of the projecting portion 66 are fixed so that they do not stand up. On the other hand, since they are non-fixed free portions, only the free portions stand up against the body side as shown in FIG. In particular, when the attachment portion 65 is located on the back surface side of the interior body 200, the barrier cuff 60 stands up so that the barrier cuff 60 opens outward in the width direction at and around the crotch portion. It comes in contact, and the fit is improved.

  The dimensions of the barrier cuff 60 can be appropriately determined. In the case of an infant paper diaper, for example, as shown in FIG. 7, the standing height of the barrier cuff 60 (the length in the width direction of the protruding portion 66 in the unfolded state) W6 is It is preferably 15 to 60 mm, particularly 20 to 40 mm. In addition, when the barrier cuff 60 is folded flat so as to be parallel to the surface of the top sheet 30, the separation distance W3 between the folds located on the innermost side is preferably 60 to 190 mm, particularly preferably 70 to 140 mm.

  Unlike the illustrated embodiment, double (two rows) of barrier cuffs can be provided on the left and right sides of the interior body 200.

(Absorption element)
The absorbent element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps the entire absorbent body 56. The packaging sheet 58 can be omitted.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber basis weight can be set to, for example, about 100 to 300 g / m ² when cotton-like pulp or short fibers are stacked, and in the case of a filament aggregate, for example, about 30 to 120 g / m ^2. Can do. The fineness in the case of a synthetic fiber is 1-16 dtex, for example, Preferably it is 1-10 dtex, More preferably, it is 1-5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used. It is preferable to disperse and hold superabsorbent polymer particles in the absorber 56.

  The absorber 56 may have a rectangular shape, but as shown in FIG. 1, as shown in FIG. 1, the hourglass has a front end portion, a rear end portion, and a narrow portion narrower than the front end portion and the rear end portion. The shape is preferable because the fit of the absorbent body 56 and the barrier cuff 60 around the legs is improved.

  Moreover, although the dimension of an absorber can be determined suitably, it is preferable to extend to the peripheral part of the interior body, or its vicinity in the front-back direction and the width direction.

(Superabsorbent polymer particles)
The absorber 56 can contain superabsorbent polymer particles in a part or all thereof. Superabsorbent polymer particles include “powder” in addition to “particles”. As the particle diameter of the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are, and those having a particle size of 1000 μm or less, particularly 150 to 400 μm are desirable. The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the sticky feeling after liquid absorption can be suppressed effectively.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the amount of polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. When it exceeds 350 g / m ² , the effect is saturated.

  If necessary, the superabsorbent polymer particles can adjust the spraying density or spraying amount in the plane direction of the absorber 56. For example, it is possible to increase the application amount of the liquid excretion site as compared to other sites. When gender differences are taken into account, men can increase the front spray density (amount), while women can increase the center spray density (amount). In addition, a portion where no polymer exists locally (for example, in a spot shape) in the planar direction of the absorber 56 can also be provided.

(Packaging sheet)
When the packaging sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and the material can be polypropylene, polyethylene / polypropylene composite material, or the like. The basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  The packaging form of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of the superabsorbent polymer particles from the front and rear end edges, the cylinder is formed so as to surround the front and back surfaces and both side surfaces of the absorbent body 56. It is preferable that the front and rear edges of the absorbent body 56 are protruded from the front and back of the absorbent body 56, and the protruding portions are crushed in the front and back directions and joined by a joining means such as a hot melt adhesive.

(Exterior sheet)
The exterior sheet 12 has a ventral part F extending from the crotch part to the ventral side and a dorsal part B extending from the crotch part to the dorsal side. As shown in FIGS. 8 and 9, a pair of left and right leg openings LO for passing the legs and a torso opening WO for passing the wearer's torso are formed. Is. Reference numeral 12A denotes a joining portion (hereinafter, this portion is also referred to as a side seal portion). The crotch portion means the center in the front-rear direction from the waist edge of the ventral part to the waist edge of the dorsal part in the deployed state, and the front part and the rear part are the ventral part F. And the back portion B.

  The exterior sheet 12 includes a trunk periphery T that is defined as a longitudinal range extending from the trunk opening WO to the upper end of the leg opening LO, and an intermediate portion L that is defined as a longitudinal range of a portion that forms the leg opening LO. The waistline portion T can be conceptually divided into a “waist side end” W and a “waistline lower portion” U. These lengths in the front-rear direction vary depending on the size of the product and can be determined as appropriate. For example, the waist side end portion W may be 15 to 40 mm, and the waist lower portion U may be 65 to 120 mm. . On the other hand, both side edges of the intermediate portion L are bundled along the circumference of the wearer's leg, and this is a portion into which the wearer's leg is put. As a result, the exterior sheet 12 has a substantially hourglass shape as a whole. The degree of tightness of the exterior sheet 12 can be determined as appropriate, and as shown in FIGS. 1 to 10, the narrowest part may be narrower than the width of the interior body 200 in order to obtain a clean appearance. However, as shown in FIG. 17, it is preferable that the narrowest part is determined to be equal to or larger than the width of the interior body 200.

  As shown in FIGS. 3 to 5, the exterior sheet 12 is formed by bonding two sheet-like materials 12S and 12H with an adhesive such as a hot-melt adhesive, and is an inner sheet positioned on the inner side. Although the sheet-like material 12H extends only to the edge of the waist opening WO, the outer sheet-like material 12S wraps around the waist-side edge of the inner sheet-like material 12H and is folded back to the inside. 12r is extended so that it may cover to the waist side edge part of the interior body 20. As shown in FIG.

The sheet-like materials 12S and 12H can be used without any particular limitation as long as they are sheet-like materials, but are preferably non-woven fabrics. The nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When using a nonwoven fabric, it is preferable that the basic weight shall be about 10-30 g / m < ² >.

  The exterior sheet 12 is provided with elongated elastic elastic members 15 to 19 such as thread rubber between the sheet materials 12S and 12H at a predetermined elongation rate in order to improve fit to the waistline. As the elongated elastic elastic members 15 to 19, synthetic rubber or natural rubber may be used. For bonding the sheet-like materials 12S and 12H of the exterior sheet 12 and fixing the elongated elastic members 15 to 19 sandwiched therebetween, hot melt bonding or heat sealing or ultrasonic bonding by various coating methods is used. Can do. If the entire exterior sheet 12 is firmly fixed, the texture of the sheet is impaired, which is not preferable. By combining these, it is preferable that the elongated elastic elastic members 15 to 19 are firmly bonded, and other portions are not bonded or bonded weakly.

More specifically, between the inner side surface of the inner sheet-like material 12H and the outer side surface of the folded portion 12r of the outer sheet-like material 12S at the waist end (upper end portion) W of the back portion B and the ventral portion F. The plurality of waist elastic elastic members 17 and 18 are fixed in a state where they are stretched along the width direction at a predetermined stretch rate at intervals in the vertical direction so as to be continuous over the entire width direction. In addition, one or more of the waist elastic elastic members 17 and 18 disposed in a region adjacent to the waistline lower portion U may overlap with the interior body 200 or overlap with the interior body 200. You may each provide in the width direction both sides except the width direction center part. As the waist resilient and elastic members 17 and 18, the thickness 155～1880Dtex, particularly about 470～1240Dtex (the case of synthetic rubber. Cross-sectional area in the case of natural rubber 0.05 to 1.5 mm ^2, in particular 0.1 the rubber thread of 1.0mm about ^2), 3 to 22 present approximately at intervals of 4 to 12 mm, an extension ratio 150% to 400%, preferably fixed in particular about 220-320%. The waist elastic elastic members 17 and 18 need not all have the same thickness and expansion rate. For example, the elastic elastic members have different thicknesses and expansion rates at the upper and lower portions of the waist end W. Also good.

  Further, between the outer side surface of the inner sheet-like material 12H and the inner side surface of the outer sheet-like material 12S in the lower waist portion U of the ventral side portion F and the back side portion B, there is a central portion in the width direction that overlaps the interior body 200. In addition, a plurality of elongated elastic elastic members 15 and 19 are spaced apart in the vertical direction so as to be continuous over the entire width direction at each of the upper side and both sides in the width direction, and at a predetermined extension rate in the width direction. It is fixed in a stretched state.

The elongated elastic elastic members 15 and 19 of the lower waist part U have a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , the rubber thread 0.1~1.0mm about ^2), 1 to 15 mm, particularly 5 to 30 present approximately at intervals of 3 to 8 mm, to secure in extension ratio 200 to 350%, particularly about 240 to 300% Is preferred.

  Further, a central portion in the width direction overlapping the interior body 200 is excluded between the outer side surface of the inner sheet-like material 12H and the inner side surface of the outer sheet-like material 12S in the intermediate portion L of the ventral portion F and the back portion B. A plurality of elongated elastic elastic members 16 are stretched along the width direction at a predetermined stretch rate at intervals in the vertical direction so as to be continuous over the entire width direction at each part on both sides in the width direction. It is fixed in the state.

The elongated elastic elastic members 16 and 18 of the intermediate portion L have a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, a cross-sectional area of 0.05 to 1.5 mm ² , The thread rubber of about 0.1 to 1.0 mm ² ) is fixed at 5 to 40 mm, particularly about 2 to 10 at intervals of 5 to 20 mm, respectively, with an elongation of 150 to 300%, particularly 180 to 260%. preferable.

  In addition, as shown in the drawing, the elongated elastic elastic members 15, 19, 16, and 18 of the lower waist portion U and the intermediate portion L are provided on both sides in the width direction except for the central portion in the width direction that overlaps the interior body 200. It is preferable that the interior body 200 does not shrink more than necessary in the width direction, and it does not look bad and does not deteriorate absorbability. In this form, in addition to the form in which the elastic stretchable member exists only on both sides in the width direction, the elastic stretchable member exists from one side of the width direction to the other side across the interior body 200, but overlaps the interior body 200. A configuration is also included in which the elastic stretchable member is cut at the center in the width direction so that the stretchable force does not act (substantially equivalent to not providing the elastic stretchable member). Of course, the arrangement of the elongated elastic members 15, 19, 16, 18 is not limited to the above example. Part or all of the members 15, 19, 16, and 18 can be provided from one side in the width direction to the other side across the interior body 200.

(pocket)
Characteristically, as shown in FIG. 5 and FIG. 6, in the overlapping portion of the interior body 200 and the exterior sheet 12 on the back side, the intermediate in the width direction from the waist side end edge to the predetermined position on the crotch side in the interior body 200. A portion (also referred to as a pocket forming portion) 201 is not joined to the exterior sheet 12 or is detachably joined. Further, the portions 202 and 203 other than the pocket forming portion 201 of the interior body 200 are strongly bonded to the inner surface of the exterior sheet 12 so as not to be separated in normal use. These joining portions 201, 202, and 203 can be formed of an adhesive such as a hot melt adhesive. Thus, when the pocket formation part of the interior body 200 is not joined, as shown in FIG. 10, the interior body 200 between the interior body 200 and the exterior sheet 12 in the pocket formation part 201 is configured. When the pocket 300 opening at the waist side edge of the interior body 200 is formed and the pocket forming portion of the interior body 200 is joined, it is peeled off as necessary, so that the interior body 200 and the exterior of the pocket formation portion 201 are peeled off. A pocket 300 is formed between the sheet 12 and the sheet 12.

  The bonding strength of these bonding portions 201, 202, and 203 can be adjusted by the type of adhesive and the amount of application when an adhesive is used. Specifically, the bonding strength (180 degree peeling strength) in the detachable bonding portion 201 is preferably about 10 to 400 gf / 25 mm, particularly about 20 to 200 gf / 25 mm. If it is 10 gf / 25 mm or less, there is a possibility that the pocket forming portion 201 will unintentionally peel off during use, and if it is 400 gf / 25 mm or more, peeling for pocket formation cannot be performed smoothly. Further, the bonding strength of the portions 202 and 203 other than the pocket forming portion is preferably about 200 to 2000 gf / 25 mm. In particular, the bonding strength of the side edge portions 203 of the inner body 200 to the exterior sheet 12 is stronger, for example, 500 to It is preferably about 2000 gf / 25 mm. In particular, as shown in FIG. 17, when the narrow width of the exterior sheet 12 is equal to or greater than the width of the interior body 200, the side edges 203 are continuously joined from the front end to the rear end. Is preferred.

  Furthermore, when joining the pocket formation part 201 of the interior body 200 so that peeling is possible, compared with the joining strength, the liquid-impermeable sheet 11 and the packaging sheet 58 (when there is no packaging sheet, it is an absorber 56). It is preferable to increase the bonding strength and the bonding strength between the sheet-like materials 12S and 12H in the exterior sheet 12, for example, about 200 to 2000 gf / 25 mm. For the same reason, when the design sheet 25 is affixed to the back surface of the exterior sheet 12, the bonding strength between the design sheet 25 and the exterior sheet 12 is also the case where the pocket forming part 201 of the interior body 200 is releasably joined. It is preferable to make it stronger than the bonding strength, for example, about 200 to 2000 gf / 25 mm.

  Moreover, among the pocket formation part 201, the interior body 200 and the exterior sheet | seat 12 are fixed so that peeling is possible only in a waist side edge, and other parts may be made non-fixed. Similarly, the waist side edge of the pocket formation part 201 may be detachably joined by a mechanical fastener or the like.

  The size of the pocket 300 can be determined as appropriate, but the pocket length 301 is determined as the product length Y (the length in the front-rear direction from the waist edge of the ventral portion F to the waist edge of the back portion B in the deployed state). 20 to 40% and the pocket width 302 is preferably about 70 to 90% of the width X of the interior body 200.

  In the form shown in FIGS. 1 to 10, since one of the inner surfaces of the pocket 300 is formed by the back surface of the interior body 200, the liquid-impermeable sheet 11 is exposed to the inner surface of the pocket 300 as it is. Therefore, in order to prevent an unexpected tear during use and a tear when peeling the joint, a sheet having sufficient strength, specifically, a longitudinal tear strength defined in JIS P 8116 is 150 gf or more, particularly It is preferable to use a sheet that is 300 gf or more. However, the moisture-permeable plastic film generally used as the liquid-impermeable sheet 11 in the field of diapers is insufficient in strength to constitute the inner surface of the pocket 300, so that the fabric weight is increased or the strength such as nonwoven fabric is increased. It is preferable to combine with a highly breathable sheet. In addition, assuming that the liquid-impermeable sheet 11 is torn, it is also preferable to perform water-repellent processing on at least the liquid-impermeable layer 11 side of the packaging sheet 58.

Specifically, when a plastic film having moisture permeability is used as the liquid-impermeable sheet 11, the basis weight of the sheet is preferably about 25 to 40 g / m ^{2 in} order to give sufficient strength. In this case, since the moisture permeability is lowered with the usually used amount of calcium carbonate particles, it is preferable to appropriately increase the amount of calcium carbonate particles within a range in which sufficient strength is maintained.

  Further, instead of or together with increasing the strength of the liquid-impermeable sheet 11, as shown in FIG. 11, a part or all of the exposed part in the pocket of the liquid-impermeable sheet 11 is formed by the breathable reinforcing sheet 20. Lined is also a preferred form. As the reinforcing sheet 20 in this case, it is preferable to use a sheet having a longitudinal tear strength of 150 gf or more, particularly 300 gf or more. In addition to the same non-woven fabric as that used for the exterior sheet 12, the sheet has air permeability such as thin paper. Paper can also be suitably used. Further, in the case where the breathable reinforcing sheet 20 is provided, when the pocket forming portion 201 of the interior body 200 is joined so as to be peelable, the joining strength is stronger and the reinforcement sheet 20 needs to be attached to the back surface of the interior body 200. For example, it is preferably about 200 to 2000 gf / 25 mm.

  Further, when a design sheet 25 designed by printing or coloring is provided between the liquid-impermeable sheet 11 and the exterior sheet 12, the design sheet 25 is used as a breathable reinforcing sheet as shown in FIG. It is preferable to do this. As the base material of the design sheet 25 in this case, in addition to the same nonwoven fabric as that used for the exterior sheet 12, paper having air permeability such as thin paper can be suitably used.

(Improvement of exterior sheet folding part 12r)
The folded-back portion 12r of the exterior sheet 12 is a preferable structure in that the appearance and the touch are improved because the joints and cut ends of the material are not exposed to the outside on the waist side edge. In addition, it is a preferable structure that the folded portion is covered and fixed on the body side of the waist side edge portion of the interior body 200 in that the contact of the waist side edge portion of the interior body 200 with the skin can be softened. However, in the case where such a folded portion 12r is provided, it is necessary to prevent the folded portion 12r from closing the opening of the pocket 300 located at the waist side edge of the interior body 200. In this case, as can be seen from the fixed portion of the folded portion 12r in FIG. 6 (the region represented by hatching by hatching), the crotch portion overlapping the interior body 200 in the folded portion 12r may be simply unfixed. When this non-fixed portion becomes a certain size, it may flutter and cause a deterioration in wearing feeling. Therefore, the entire crotch portion overlapping the interior body 200 in the folded portion 12r is not fixed as in the illustrated example, but is located on both sides in the width direction of the pocket 300 in the crotch side end of the folded portion 12r. This can be prevented by fixing the part. Furthermore, in the present invention, the following structure is also proposed in order to prevent the wearing feeling of the folded portion 12r from deteriorating.

  That is, as shown in FIG. 13, when the crotch side edge of the folded portion 12r is positioned closer to the crotch side than the waist side end edge of the interior body 200, the first structure has a portion overlapping the interior body 200 as shown in FIG. It is the form which is located between 200 and the exterior sheet | seat 12, and is fixed with respect to the inner surface of the outer surface side part (in the illustrated form, the inner surface of the inner sheet-like material 12H). In the illustrated example, for a form in which the design sheet 25 is attached to the inner surface of the exterior sheet 12, the design sheet 25 is sandwiched between the outer surface side portion of the exterior sheet 12 and the design sheet 25 and bonded and fixed to both.

  Next, as shown in FIG. 14, the second structure shortens the folding length of the folded portion 12 r, and the crotch side edge of the folded portion 12 r is positioned on the waist side from the waist side edge of the interior body 200 (or And may be fixed to the inner surface of the outer surface side portion (in the illustrated embodiment, the inner surface of the inner sheet-like material 12H). In this case, the structure is simplified, but unlike other structures in which the waist side edge of the interior body 200 is covered by the folded portion 12r, the waist side edge of the interior body 200 is not covered by the folded portion 12r, and the skin side Exposed to.

  Next, in the third structure, as shown in FIGS. 15 and 16, the crotch side edge of the folded portion 12 r is positioned on the crotch side with respect to the waist side edge of the interior body 200, and is covered on the inner surface side of the interior body. In addition, of the crotch side end portions of the folded portion 12r, the portions located on both sides in the width direction of the pocket 300 are fixed to the inner surface of the outer surface side portion (in the illustrated embodiment, the inner surface of the inner sheet-like material 12H) (hatched by hatching The region shown is the fixed portion of the folded portion 12r), and the portion between the fixed portions is not fixed, and the elastic elastic member 12g is fixed to the non-fixed portion while being stretched along the width direction. It is a thing. In this case, the crotch side end portion of the folded-back portion 12r is contracted by the contraction of the elastic elastic member 12g and is not opened. Further, the crotch side end of the folded portion 12r covers the opening of the pocket 300, but can be expanded and contracted by the elastic elastic member 12g, so that the folded portion 12r can be stretched and rolled. It is easy to expose the opening, and when the pocket 300 is closed, the folded portion 12r automatically returns to the original position due to the contraction of the elastic elastic member 12g.

  The elastic elastic member 12g in the third structure is preferably provided over a range equal to or larger than the width of the pocket 300, but can be provided only in a narrower range. The elastic expansion / contraction member 12g is preferably provided at least at the crotch side end portion of the non-fixed portion of the folded portion 12t, but can be provided at the waist side portion together with or instead of this. In addition, it is preferable that the elastic elastic member 12g is fixed with a rubber thread having a thickness of about 470 to 1240 dtex, particularly about 620 to 940 dtex at an elongation of about 70 to 220%, particularly about 70 to 150%. It is preferable that about 2 to 4 are provided at intervals of about 1 to 15 mm. Further, the elastic elastic member 12g may be fixed in a state of being stretched over the entire width of the exterior sheet 12, similarly to the waist elastic elastic members 17 and 18, and the folded-back portion 12r crotch side end is as shown in the example of FIG. In addition, it may be unfixed over the entire width (inside the side seal portion) of the exterior sheet 12 including the portions located on both sides in the width direction of the pocket 300.

  In the fourth structure, although not shown, the folded portion 12r is placed on the body side of the waist side edge of the interior body 200, and the entire crotch side end of the folded portion 12r is covered with the inner surface of the inner sheet-like material 12H and the interior body 200. It fixes to the body side surface of the waist side edge part so that peeling is possible. In this case, when the pocket is used, the folded portion 12r can be peeled off as much as necessary, and an object can be taken in and out of the pocket.

(About improvement of the waist side edge of the interior)
When the absorbent body 56 includes superabsorbent polymer particles, particularly when the superabsorbent polymer particles are not fixed in the absorbent body 56, in the structure of the present invention, the edge on the waist side of the interior body 200 is the pocket 300. Since it is exposed as an opening edge, there is a possibility that the superabsorbent polymer particles may leak from between the materials on the waist side edge of the interior body 200 when the pocket 300 is used. In order to prevent this, the absorber 56 is not provided on the waist side edge of the interior body 200, and the waist side edge of the interior body 200 is formed between the edge of the liquid-permeable surface sheet 30 and the liquid-impermeable sheet 11. Although it is possible to employ a structure in which the superabsorbent polymer particles are sealed so as not to leak from the waist side edge, the sealing part may be opened when the pocket 300 is used. Therefore, as shown in the figure, the packaging sheet 58 is wrapped around and wrapped around the absorbent body 56 so as to surround the front and back surfaces and both side surfaces, and the waist side edge portion of the tubular packaging sheet 58 is It protrudes from the waist side edge part of the absorber 56, and this protrusion part is made into the structure which is crushed in the front and back direction, and is joined, and the joining strength of the junction part of the waist side edge part in the packaging sheet 58 is higher than before. It is strong, specifically, it is also a preferable form to be about 500 to 2000 gf / 25 mm. This bonding strength can be adjusted according to the bonding conditions. For example, when bonding is performed using an adhesive such as a hot melt adhesive, the bonding strength can be adjusted based on the amount of adhesive applied. Further, the waist side edge of the interior body 200 is joined over the entire width direction by a fusing means such as embossing, particularly heat embossing with heating or ultrasonic sealing, and between the materials at the waist side edge of the interior body 200 It is preferable to prevent the superabsorbent polymer particles from leaking between the materials. The packaging sheet 58 extends to the waist side edge of the interior body 200 and may be joined together with the topsheet 30 and the liquid-impermeable sheet 11, but in order to be fused, the packaging sheet 58 is not a paper material. A non-woven fabric made of fibers mainly composed of a thermoplastic resin is desirable.

    Further, in these cases, or in place of them, by shortening the front-rear length of the absorber 56, the portion of the interior body 200 that does not have the absorber 56 is widened (for example, about 50 to 80 mm). ) Also makes it difficult for the materials at the waist side edge of the interior body 200 to be separated, and leakage of the superabsorbent polymer particles from between the materials is prevented. Further, if the liquid-impermeable sheet 11 is present up to the waist side edge of the interior body 200, the rigidity of the interior body 200 is increased, so that there is an advantage that opening and closing of the pocket is facilitated. On the contrary, when the waist side edge of the liquid-impermeable sheet 11 is separated from the waist side edge of the interior body 200 toward the crotch side, there is an advantage that the liquid-impermeable sheet 11 becomes inconspicuous.

(Exterior sheet split structure)
In the example shown in FIGS. 1 to 10, the abdominal side to the back side are continuously covered with an integral exterior sheet 12, but as shown in FIGS. 18 and 19, the exterior sheet 12 is not worn by the wearer. It is divided into an abdominal exterior sheet 12F that covers the abdomen and a back exterior sheet 12B that covers the back side of the waistline, and the front end of the interior body 200 is hot-melted on the inner surface in the center in the width direction of the abdomen exterior sheet 12F. In addition to being connected by an adhesive or the like, the rear end portion of the interior body 200 is connected to the inner surface of the central portion in the width direction of the back side exterior sheet 12B by a hot melt adhesive or the like, and the abdominal side exterior sheet 12F and the back side exterior sheet It is also possible to adopt a configuration in which 12B is not continuous on the crotch side and is separated. The separation distance Z can be about 150 to 250 mm.

  In this case, on the back surface of the liquid-impermeable sheet 11 in the interior body 200, an entire portion exposed so as to cover the entire back surface of the interior body 200 or between the abdominal exterior sheet 12F and the back exterior sheet 12B. The crotch outer sheet 12M can be fixed so as to cover it. As the crotch outer sheet 12M, the same material as that used for the outer sheet 12 described above can be used.

  Particularly in this case, the reinforcing sheet 20 described above is formed by extending the crotch outer sheet 12M to a position where it overlaps with the pocket 300 and covering a part or all of the exposed part of the liquid impermeable sheet 11 on the inner surface of the pocket 300. It is preferable to exhibit the same function as. In this case, the bonding strength of the crotch outer sheet 12M to the liquid-impermeable sheet 11 is preferably approximately the same as that of the reinforcing sheet 20.

(Other)
The pocket 300 can also be provided on the ventral side, but in the case of a baby diaper, the contents of the pocket 300 may be tampered with, so it is preferable to provide it only on the back side.

  In the pocket 300, the user can put an arbitrary thing (attached to the product or other things) at the time of use, and the manufacturer can put an arbitrary thing in advance at the time of manufacture. Specific examples include warmers to warm the body, chilled items to cool the body, fragrances (sheets soaked with fragrances such as aroma oil), portable wet or dry tissue paper, portable butt Wiping etc. can be mentioned.

  When the elastic elastic members 15 to 19 provided on the exterior sheet 12 extend over both sides or the whole of the pocket 300 in the width direction, the outer portion (the exterior sheet 12) of the pocket 300 has elasticity, Good retention of things.

  The present invention is suitable for a pants-type disposable diaper as in the above example, but can also be applied to a stationary disposable diaper.

It is a top view in the state where the diaper was developed showing the inside of a pants type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a pants type disposable diaper. FIG. 3 is a 3-3 cross-sectional view of FIG. 1. FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 in FIG. 1. It is a top view in the state where the diaper was developed showing only the principal part of a pants type disposable diaper. It is sectional drawing which shows only the principal part of an underpants type disposable diaper. It is a front view of a product state. It is a rear view of a product state. It is sectional drawing which shows the state which opened the pocket. It is sectional drawing which shows another form. It is sectional drawing which shows another form. It is sectional drawing which shows another form. It is sectional drawing which shows another form. It is sectional drawing which shows another form. It is a top view in the state where the diaper was developed showing only the principal part of other forms. It is a top view in the state where the diaper was developed showing only the principal part of other forms. It is a top view in the state where the diaper was developed showing only the principal part of other forms. It is sectional drawing which shows another form.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Girth part, 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 12r ... Folded part, 20 ... Breathable reinforcement sheet, 25 ... Design sheet, 200 ... Interior body, 30 ... Top sheet, 40 ... Intermediate sheet, DESCRIPTION OF SYMBOLS 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Side barrier cuff, 62 ... Barrier sheet, 300 ... Pocket.

Claims (9)

An absorbent body is interposed between the liquid-permeable surface sheet and the liquid-impermeable sheet, and a main body formed so as to cover from the back side through the crotch to the abdomen, and on the outer surface of the main body In a disposable diaper provided with at least a front and back waist side ends and an exterior sheet formed to cover at least the waistline,
Of the overlapping part of the main body and the exterior sheet on at least one of the ventral side and the back side, the intermediate portion in the width direction from the waist side end edge to the predetermined position on the crotch side in the main body is not joined to the exterior sheet Or it is joined in a peelable manner,
The space between the main body portion and the exterior sheet in the non-bonded or releasably bonded portion is configured to be a pocket that opens to the waist side edge of the main body portion.
A disposable diaper characterized by that.   The liquid-impermeable sheet has moisture permeability, and at least a part of the liquid-impermeable sheet is exposed on the inner surface of the pocket, and the front-rear direction defined in JIS P 8116 of the liquid-impermeable sheet The disposable diaper according to claim 1, wherein the tear strength is 150 gf or more.   The liquid-impermeable sheet is made of a moisture-permeable plastic film, and at least a part of the liquid-impermeable sheet is exposed on the inner surface of the pocket, and at least a part of the exposed part is made of a breathable reinforcing sheet. The disposable diaper according to claim 1 or 2, wherein the disposable diaper is lined.   The disposable diaper according to claim 3, wherein the breathable reinforcing sheet is a designed design sheet, and the design is visible from the outer surface through the exterior sheet. The exterior sheet has an outer surface side portion and a folded portion folded inward from the waist side edge of the outer surface side portion,
In the folded portion, the crotch side edge is located on the crotch side from the waist side end edge of the main body,
The disposable part according to any one of claims 1 to 4, wherein a portion of the folded portion that overlaps the main body portion is located between the main body portion and the exterior sheet and is fixed to the outer surface side portion. Diapers. The exterior sheet has an outer surface side portion and a folded portion folded inward from the waist side edge of the outer surface side portion,
The crotch side edge of the folded portion is located on the waist side of the main body part or located on the waist side, and is fixed to the inner surface of the outer surface side part. The disposable diaper of any one of 4. The exterior sheet has an outer surface side portion and a folded portion folded inward from the waist side edge of the outer surface side portion,
The folded portion, the crotch side edge is located on the crotch side than the waist side end edge of the main body part, and is covered on the inner surface side of the main body part,
The crotch side end portion of the folded portion is not fixed at least partially to the main body portion, and an elastic expansion / contraction member is fixed to the non-fixed portion in a state of extending along the width direction. The disposable diaper of any one of -4.   The waist side edge part of the said main-body part does not have the said absorber, and is formed by the melt | fusion joining of the edge part of the said liquid-permeable surface sheet, and the edge part of a liquid-impermeable sheet. The disposable diaper of any one of -7.   The absorbent body includes superabsorbent polymer particles, and a packaging sheet is wrapped around and wrapped around the front and back surfaces and both side surfaces, and the waist side edge portion of the tubular packaging sheet absorbs the absorption. It protrudes from the waist side edge part of the body, this protrusion part is crushed in the front and back direction and joined, and this joining strength is 500 to 2000 gf / 25 mm. The disposable diaper of any one of Claims.

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