JP2012135521A5 - - Google Patents

Description

Pants-type disposable diaper

  The present invention relates to a pants-type disposable diaper characterized by a means for fixing in a state of being rolled up at the time of disposal.

  In general, pants-type disposable diapers are temporarily stored in a tightly sealed storage container such as a diaper storage container such as a diaper storage container that is rounded or folded (hereinafter also referred to as a discarded state) so that the attached surface of the excrement is on the inside. When the amount stored in the container reaches a certain level, it is put in a garbage bag and discarded.

  In FIG. 17, the reference photograph of the discard state of the conventional pants type disposable diaper is shown. As post-processing means for fixing the pants-type disposable diaper in a rolled state, for example, it is common to provide an adhesive tape as a separate member in the center in the width direction of the outer surface in the vicinity of the waist side end portion of the rear portion. .

  In the pants-type disposable diapers disclosed in Patent Literature 1 and Patent Literature 2, the peeled portion can be used as a post-processing means by peeling a part of the exterior sheet after use. In this way, by using a part of the exterior sheet as a post-processing means, it is possible to reduce raw material costs and manufacturing processes as compared to providing another member as a post-processing means. The sheet surface has the advantage that the texture of the sheet surface is not impaired.

Japanese Patent Laid-Open No. 11-104171 JP 2003-169824 A

However, the post-processing means of the pants-type disposable diaper disclosed in Patent Literature 1 and Patent Literature 2 are both located in the center of the diaper in the width direction, and extend in the longitudinal direction of the diaper to fix the rolled diaper. To do. In such conventional means, when the excrement protrudes outside the leg opening, the operator's fingers or other articles are contaminated by the excrement in the leg opening when rolling or after post-processing. There was a fear.

  Then, the main subject of this invention is providing the underpants type disposable diaper which has a post-processing means in which excrement does not contaminate fingers and other articles more easily than a leg part opening.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
By including an exterior sheet having a front body and a back body, and an interior body including an absorbent body fixed to the inner surface of the exterior sheet, the front body and the back body of the exterior sheet are joined at both sides. In a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed,
It has a waist elastic part which has elasticity in the waist opening part of the front body and the back body,
The front body and at least one of the back body has a stretchable waist stretchable portion in the width direction toward the leg opening from the waist stretchable portion in the longitudinal direction,
The front to waist stretchable part of the body or the back body has a cut open portion of the right and left pair of belt-shaped extending in the width direction from near the junction both side portions in the width direction near the center,
The cut portion is configured to be cut open and extend toward the outside in the width direction, leaving either one of the joint side end and the center side end.
A pants-type disposable diaper characterized by that.

(Function and effect)
When the pants-type disposable diaper according to the present invention is folded into a discarded state by winding it from the front-rear direction central portion side to the front-rear end side in a folded state in which the front portion and the rear portion are combined, the front body or the back body A part of the member including the periphery of both sides of the elastic part around the waist of the body is cut into a band shape, and the belt-like members on both the left and right sides are brought close to each other near the center so as to be wrapped from both side ends of the rounded discarded diaper. Can be combined by binding or the like. When the strip-shaped slit is provided on the back body, it is preferable that the central part in the front-rear direction is rounded toward the front end, and when it is provided on the front body, it is rounded toward the rear end.

In this way, by extending the post-processing means in the width direction instead of the front-rear direction, the opening around the leg of the diaper is disposed in the discarded state so that the post-processing means itself or the side of the front-rear body following the post-processing means It becomes the form which an end member covers. For this reason, the opening around the leg is closed, and the leakage of excrement from the opening is reduced.

Further, by cutting a part of the body and using it as post-processing means, post-processing can be performed without providing a separate belt-shaped member. Therefore, it is possible to reduce the cost of by providing a separate member, it is possible to prevent the wearing feeling by providing a separate member is impaired, offers several advantages including.

Further, of the front and back bodies, by providing the cut open portion of the postprocessing means formed waist stretchable portion the elastic member arranged in the width direction, the post-processing unit after being cut open with a stretchable in the width direction The configuration. Since the post-processing means has elasticity, post-processing is made easier.

Even though the cut open portion is provided in a portion not disposed elastic members of the body-surrounding stretchable portion, cut open portion is extendable outward in the width direction, is sufficiently available as a post-processing means.

<Invention of Claim 2>
The waist stretchable part is made is formed by bonding elongated waist elastic members extending along the width direction longitudinally spaced three or more, the cut open portion is at least one waist The pants-type disposable diaper according to claim 1, comprising a surrounding elastic member.

(Function and effect)
Waist stretchable portion, it is per se may be used materials having stretchability as member outer sheet, even material without stretch itself, a plurality bonding the elongated elastic member Therefore, it has stretchability as a whole and can constitute a waistline stretchable portion. As a result, it is possible to select a non-woven fabric having a good touch and texture as a material for the exterior sheet.

  In this case, in order to give the post-processing means elasticity, at least one of the elongated elastic members needs to be arranged in the slit portion.

<Invention of Claim 3>
Wherein the cut open portion corresponding portion of the outer sheet is made of three or more layers of nonwoven fabric, the cut open portion is made of two outer layers, not joined to the cut open portion abutting the inner layer to claim 1 or The pants-type disposable diaper according to 2.

(Function and effect)
If the outer sheet has a three-layer structure or more, a cut-off portion is provided, the outer two layers are cut, and the post-processing means prevents a situation in which a hole is formed in the outer sheet after opening and excrement leaks from this portion. Can do. Moreover, the intensity | strength can be increased by making a post-processing part into 2 layers. Moreover, when it has an elongate elastic member, an elastic member can also be fixed with a hot-melt adhesive etc. between the two layers of nonwoven fabric of a slit part, and an elastic member is exposed when using it as a post-processing means. Therefore, it is possible to prevent the touch of the part and the decrease in cosmetics.

<Invention of Claim 4>
The pants-type disposable according to any one of claims 1 to 3, wherein the slit portion is cut from an exterior sheet by a perforation, and a force required to cut the perforation is 0.1 to 10 kgf / 25 mm. Diapers .

(Function and effect)
By forming the post-processing means on the exterior sheet with perforations and defining the perforation strength, the risk that the perforation may be accidentally cut when worn or difficult to open as a post-processing means after use. Can be reduced.

<Invention of Claim 5>
The pants-type disposable diaper according to any one of claims 1 to 4, wherein the cut-opening portion is cut open from the widthwise central portion toward the side end portion, leaving the side end portion side.

(Function and effect)
The band-shaped cut-off portion is formed in a shape that is cut from the central portion toward the side end portion, and the band-shaped post-processing member can be extended in the width direction by folding the cut-off band-shaped member outward in the width direction. The post-processing members can be more easily combined.

<Invention of Claim 6>
The pants-type disposable diaper according to any one of claims 1 to 4, wherein the slit portion is cut open from the side end portion toward the center portion in the width direction, leaving the center portion in the width direction.

(Function and effect)
By making the cut-off portion into a shape that cuts from the side end toward the center in the width direction, the side end side of the cut-out portion is cut when peeling the joint part of the disposable diaper after use, and the cut-out portion is completely exterior The risk of falling off the seat can be reduced.

  As described above, according to the present invention, when winding and rounding so that the central portion in the longitudinal direction is on the inside, the post-processing means can be coupled from both sides so as to wrap the side end portion. Contamination of fingers and the like due to excreta attached to the opening can be reduced.

It is a top view in the state where the diaper was developed showing the inside of the underpants type disposable diaper concerning a 1st embodiment. It is a top view in the state where the diaper was developed showing the outer surface of the pants type disposable diaper concerning a 1st embodiment. FIG. 3 is a 3-3 cross-sectional view of FIG. 1. FIG. 4 is a sectional view taken along the line 4-4 in FIG. 1. FIG. 5 is a sectional view taken along line 5-5 in FIG. 1. FIG. 6 is a sectional view taken along line 6-6 in FIG. It is sectional drawing which shows only the principal part of a pants type disposable diaper. It is a front view of a product state. It is a rear view of a product state. It is a rear view of the state which opened the post-processing means. It is a schematic perspective view which shows a post-processing method. It is a schematic perspective view which shows the state after post-processing. It is the rear view of the product state of the underpants type disposable diaper which concerns on 2nd Embodiment, and a partial enlarged view. It is a rear view of the product state of the pants type disposable diaper which concerns on 3rd Embodiment. It is a rear view of the state which opened the post-processing means of the underpants type disposable diaper which concerns on 4th Embodiment. It is a top view in the state where the diaper was developed showing the outer surface of the pants type disposable diaper concerning a 5th embodiment. It is a photograph which shows the example of the post-processing means of the conventional pants type disposable diaper.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
<First Embodiment>
1 to 12 show a first embodiment of a pants-type disposable diaper (hereinafter also referred to as “diaper”). This pants-type disposable diaper is composed of an exterior sheet 12 forming the outer surface (back surface) of the product and an interior body 200 attached to the inner surface of the exterior sheet. 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.

Specifically, the bonded portion in the present embodiment is formed by solid, bead, curtain, summit, spiral coating or the like such as hot melt adhesive. In addition, “front-rear direction” means a direction connecting the ventral side (front side) and the back side (rear side), “width direction” means a direction (left-right direction) perpendicular to the front-rear direction, and “up-down direction mounting state of the diaper with ", i.e. a direction perpendicular to the waist direction when the diaper so as to superimpose the front body side portions and the back body side portions folded into two at the crotch portion of the diaper, the waist opening in other words The direction which connects the part WO side and the crotch part side is meant.

(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 top sheet 30 has a property of transmitting liquid, and examples thereof include a porous or non-porous nonwoven fabric, a porous plastic sheet, and the like. 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 providing the barrier cuffs 60, both side portions of the topsheet 30, through between the liquid impervious sheet 11 and the barrier cuffs 60, Mase write around to the back side of the absorbent element 50, in order to prevent the penetration of liquid, the liquid 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 of 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 illustrated form is disposed 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-impermeable and moisture-permeable material that has been preferred in recent years from the viewpoint of preventing stuffiness. 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 fiber, leakproof reinforcement by reducing the voids of the fiber by applying heat or pressure, and methods such as coating with 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.

Liquid impervious sheet 11, in order to improve the leakproofness preferably extend to both side portions of the topsheet 30 side of the absorbent element 50 Mase write around the sides of the absorbent element 50. The width of this extended portion is suitably about 5 to 20 mm on each of the left and right sides.

  Moreover, the excretion indicator from which a color changes by contact with a liquid component can be provided inside the liquid-impermeable sheet 11, especially the absorber 56. The excretion indicator is preferably provided along the longitudinal direction of the diaper, but is preferably provided along the band 90 so as not to overlap the band 90 described later.

(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 the width direction. in the elongated resilient and elastic members 63 under tension in the longitudinal direction, those formed by a plurality of fixed 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 spunbonded nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), a melt-blown nonwoven fabric having 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%. The term “elongation rate” means a value when the natural length is 100%. 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 mounting portion 65 is positioned on the back side of the inner body 200, since the barrier cuffs 60 in the crotch portion and the vicinity thereof are erected to open outward in the width direction, in terms to the barrier cuffs 60 legs around those 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 topsheet 30, the separation distance W3 between the innermost folds 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. Waist portion T can be divided conceptually into a "waist side end portion" W and "waist bottom" U. The length of these longitudinal directions, depends on the size of the products may be appropriately determined, an example, the waist side end portion W is 15 to 40 mm, the waist bottom U can be a 65~120mm . 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, the narrowest part can be determined so as to be equal to or larger than the width of the interior body 200.

As shown in FIGS. 3 to 7, the exterior sheet 12 is formed by bonding two sheet base materials 12 </ b> S and 12 </ b> H with an adhesive such as a hot melt adhesive, and is an inner sheet positioned on the inner side. Although the base material 12H extends only to the edge of the waist opening WO, the outer sheet base material 12S wraps around the waist side edge of the inner sheet base material 12H and is folded back to the inside. 12r is extended so that it may coat | cover up to the waist side edge part of the interior body 200. FIG. Therefore, the exterior sheet has a three-layer structure in the folded portion 12r (denoted as TL in the figure). The exterior sheet 12 is not limited to two or three layers as long as the air permeability of the diaper and the flexibility as the sheet are not impaired, and may have a structure having four or more layers.

The sheet base materials 12S and 12H can be used without particular limitation as long as they are sheet base 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 >.

And in the example of illustration, in order to improve the fitting property with respect to the trunk | drum, the elongate elastic elastic members 15-19, such as a rubber thread, are provided in the exterior sheet 12 by the predetermined | prescribed elongation rate between both sheet base materials 12S and 12H. It has been. In addition, it is good also as a structure which arrange | positions a stretchable sheet, suitably a stretchable nonwoven fabric, and does not distribute the elongate elastic stretchable members 15-19 in an exterior sheet. Or you may use both an elastic nonwoven fabric and an elongate elastic elastic member (not shown).

As the elongated elastic elastic members 15 to 19, synthetic rubber or natural rubber may be used. For bonding the two sheet base materials 12S and 12H of the exterior sheet 12 and fixing the elongated elastic elastic members 15 to 19 sandwiched therebetween, hot melt bonding or heat sealing or ultrasonic bonding by various application 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.

Specifically, between the inner surface of the inner sheet base 12H and the outer surface of the folded portion 12r of the outer sheet base 12S at the waist end (upper end) 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 extended along the width direction at a predetermined extension rate at intervals in the vertical direction so as to be continuous over the entire width direction. Further, of the waist resilient and elastic members 17 and 18, for one or a plurality are arranged in a region adjacent to the waist bottom U, it may overlap the inner body 200, overlapping the inner 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, respectively elongation from 150% to 400%, preferably fixed in particular about 220-320%. The waist elastic elastic members 17 and 18 do not have to have the same thickness and elongation rate. For example, the elastic elastic members have different thicknesses and elongation rates at the upper and lower portions of the waist end W. Also good.

Between the ventral portion F and dorsal portion outer surface and an inner surface of the outer sheet base material 12S of the inner sheet base material 12H at waist bottom U of B, and the widthwise central portion overlapping the inner body 200 A plurality of elongated elastic members 15 and 19 are vertically spaced apart from each other on the upper side and both sides in the width direction so as to be continuous over the entire width direction, and at a predetermined elongation rate in the width direction. It is being fixed in the state extended along.

Waist as the elongated resilient and elastic members 15, 19 of the lower U, 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 the rubber thread 0.1~1.0mm about ^2), 1 to 15 mm, for fixing in particular 5 to 30 present approximately at intervals of 3 to 8 mm, respectively elongation 200-350%, particularly about 240 to 300% Is preferred.

Moreover, the width direction center part which overlaps with the interior body 200 is excluded between the outer surface of the inner sheet base 12H and the inner surface of the outer sheet base 12S in the middle part L of the ventral part F and the back part B. Thus, a plurality of elongated elastic elastic members 16 are extended along the width direction at a predetermined extension 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 5 to 10 mm at intervals of about 2 to 10, and the elongation rate is 150 to 300%, particularly 180 to 260%. preferable.

Note that, as illustrated, elongated resilient and elastic members 15,19,16,18 of the waist bottom U and the intermediate portion L are each provided at its both lateral sides with the exception of the width direction central portion overlapping the inner body 200 It is preferable because the inner body 200 does not shrink more than necessary in the width direction, and it does not look bad or absorbs. 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 arranged form of elongated resilient and elastic members 15,19,16,18 is not limited to the above example, so as to act the stretching force over the entire width direction of the waist bottom U, elongated waist lower U A part or all of the elastic elastic members 15, 19, 16, 18 can be provided from one side in the width direction to the other side across the interior body 200.

(Exterior sheet split structure)
In the illustrated example, it covers continuously the integral outer sheet 12 to the back side portion B from the ventral side portion F, the exterior sheet, and the ventral side outer sheet covering the ventral side of the torso of the wearer It is divided into a backside exterior sheet that covers the back side, and the front end of the interior body is connected to the inner surface of the center part in the width direction of the abdominal side exterior sheet by a hot melt adhesive or the like, and the width direction of the backside exterior sheet The rear end portion of the interior body is connected to the inner surface of the central portion by a hot melt adhesive or the like, and the abdomen side exterior sheet and the back side exterior sheet are not continuous on the crotch side, and are separated from each other. be able to. This separation distance can be about 150 to 250 mm. In this case, the back surface of the liquid-impermeable sheet in the interior body is crotch so as to cover the entire back surface of the interior body, or to cover the entire portion exposed between the abdominal exterior sheet and the back exterior sheet. A partial exterior sheet can also be fixed. As the crotch outer sheet, the same material as that used for the outer sheet described above can be used.

(Post-processing means)
As shown in FIGS. 2, 5, 6 and 9, the three-layer portion TL of the exterior sheet on the back side of the pants-type disposable diaper of the present embodiment has a pair of left and right band-shaped slits for use as post-processing means. 101 is provided. In the illustrated example, the slit portion 101 extends from the joint portion 12A toward the interior body abutting portion starting from the central portion, and has an end near the center in the width direction. In this embodiment, in order to secure the length in the width direction of the cut-out portion 101, it is preferable that the center-side end of the cut-out portion 101 is close to the cut-off portion 101. The distance between both ends is preferably 0 to 140 mm, and the length of each slit portion in the width direction is preferably 40 mm or more. On the other hand, if the starting end portion of the slit portion 101 is too close to the joint portion 12A, the slit portion 101 may fall off and be separated from the exterior sheet when a tear occurs in the width direction when the joint portion 12A is peeled off during post-processing. There is sex. Therefore, it is preferable that the starting end portion of the slit portion 101 is 0.5 to 20 mm from the joint portion 12A. The length of the slit portion 101 in the front-rear direction is preferably 5 to 40 mm, particularly 10 to 25 mm, so as not to protrude from the region of the three-layer portion TL.

When arranging the waist resilient and elastic members 17 to the lower waist as in the illustrated example, it is preferable to arrange so at least one of the resilient and elastic members 17 is positioned at the cut open portion 101.

  It is preferable that the separation line CL that forms the slit portion is formed as a perforation line. As shown in FIG. 6, the cut-off lines 101L and 101R are formed in a two-layer structure by arranging the separation line CL only in two layers from the outside in the three-layer portion TL and not in one layer on the inside. . The separation line CL is preferably formed so that the force applied when the user separates is 0.1 to 10 kgf / 25 mm or less, desirably 0.5 to 3.0 kgf / 25 mm.

  A dot portion in FIGS. 5 and 6 indicates a portion joined by an adhesive or the like. As shown in the drawing, the inner layer of the two layers forming the cut-out portion 101 is not bonded to the abutting inner layer.

  FIG. 10 shows a state where the separation line CL is disconnected. The cut-off portion 101 can be extended outward in the width direction of the diaper by folding back at the starting end portion outward in the width direction. In the illustrated example, the liquid-impermeable sheet 11, the barrier sheet 62, and the folded-back portion 12r of the exterior sheet are exposed from the opening 102 in which the exterior sheet is generated by folding the slit portion 101. Thus, it is preferable to form the opening 102 so as not to be a complete opening having no members inside.

  11 and 12 schematically show the post-processing procedure. After use, the cut-off portion 101 is cut open from the exterior sheet of the back body B by a separation line and extended from the left and right ends of the diaper. The used diaper is rounded from the center part in the front-rear direction to the front end side in a folded state. The rounded diaper is fixed in a rounded state by the two band-shaped slits 101 extending to the front body side so as to be related to the side edges of the diaper and being bound together in the vicinity of the center in the width direction. The

<Second Embodiment>
FIG. 13 shows a rear view of the second embodiment (FIG. 13A) and an enlarged view of the joint 12A (FIG. 13B). The diaper which concerns on 2nd Embodiment has the raising end part of the slit part 101 in the width direction center side, and has the terminal end in the width direction side end. In the case of this embodiment, even if the starting end portion of the cut-out portion 101 is extended to a portion having no stretchability, the performance as the post-processing means is not changed, and the cut-out portion 101 is easily dropped from the exterior sheet. The risk is higher. Therefore, it is preferable to provide only at the expansion / contraction portion where the elastic expansion / contraction member 17 is disposed.

  In general, a pants-type disposable diaper is processed by peeling the joint 12A after use. In the case of the present embodiment, the cut-off portion 101 can be cut open by separating the separation line CL after peeling off the joining portion 12A.

  As shown in FIG. 13A, the joining portion 12A is formed by arranging a large number of linear heat embosses 12E parallel to the width direction. When peeling off the joining portion 12A, the exterior sheet is characterized by being easily cut along the width direction from the heat embossed 12E portion. By using this feature and arranging the separation line CL so as to overlap the heat emboss 12E, the separation line CL can be more easily separated.

  In addition to the joining by heat embossing, any known joining method such as joining by ultrasonic waves can be used for the joining portion 12A.

<Third Embodiment>
FIG. 14 shows a rear view of the third embodiment. The diaper according to the third embodiment is provided with a separation line so as to surround the cut-out portion 101 in a rectangle, and has a configuration in which the end can be on the center side in the width direction or on the side end side. . The configuration in which the end of the slit portion 101 is provided on the center side in the width direction is preferable because the slit portion 101 can be extended to the outer side in the width direction of the diaper for a longer time. There is a possibility that the starting edge of the slit portion 101 is cut off and the slit portion 101 falls off the exterior sheet. In this case, in the present embodiment, the central portion in the width direction of the slit portion 101 can be selectively used as the starting end portion.

  If all the cut-off lines are easily cut off, the cut-off portion is likely to drop off from the exterior sheet. Therefore, it is preferable that the cut-off line CL1 extending in the front-rear direction is harder to cut than the cut-off line CL2 extending in the width direction. Specifically, it is preferable that the force required for the user to cut off the separation line CL1 is 0.5 to 10 kgf / 25 mm or less, desirably 1.0 to 5.0 kgf / 25 mm.

<Fourth Embodiment>
FIG. 15 shows a fourth embodiment. 4th Embodiment has the latching means 103 in the inner surface of any one of the slit parts 101. FIG. As the locking means, when the exterior sheet is made of a nonwoven fabric, a hook tape of a hook-and-loop fastener can be suitably used. In place of this, an adhesive tape and a release sheet may be provided (not shown). In the illustrated example, the inner contact surface of the locking means 103 is the liquid-impermeable sheet 11. When the liquid-impermeable sheet 11 is a plastic film such as polyethylene, it is unlikely that the hook tape and the sheet 11 are unnecessarily locked and it becomes difficult to open the slit 101.

  In the case of the illustrated example, it is possible to easily fix the discarded state (rounded state) by superimposing the other slit portion on the outside of the slit portion 101 having the locking means during post-processing.

<Fifth Embodiment>
FIG. 16 shows a fifth embodiment. The fifth embodiment has slits 101 on both the front body F and the back body B. In post-processing, it is preferable to round the folded diaper toward the front end side from the central part in the front-rear direction, but there is also a possibility that the user may round the diaper toward the rear end side. Even in this case, it is possible to appropriately maintain the disposal state of the diaper by providing the slit part 101 also in the front body F.

  The present invention can be applied to a pants-type disposable diaper as in the above example.

  DESCRIPTION OF SYMBOLS 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 12r ... Folded part, 200 ... Interior body, 30 ... Surface sheet, 40 ... Intermediate sheet, 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Side barrier cuffs, 62... Barrier sheet, 101.

Claims (6)

By including an exterior sheet having a front body and a back body, and an interior body including an absorbent body fixed to the inner surface of the exterior sheet, the front body and the back body of the exterior sheet are joined at both sides. In a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed,
It has a waist elastic part which has elasticity in the waist opening part of the front body and the back body,
The front body and at least one of the back body has a stretchable waist stretchable portion in the width direction toward the leg opening from the waist stretchable portion in the longitudinal direction,
The front to waist stretchable part of the body or the back body has a cut open portion of the right and left pair of belt-shaped extending in the width direction from near the junction both side portions in the width direction near the center,
The cut portion is configured to be cut open and extend toward the outside in the width direction, leaving either one of the joint side end and the center side end.
A pants-type disposable diaper characterized by that. The waist stretchable part is made is formed by bonding elongated waist elastic members extending along the width direction longitudinally spaced three or more, the cut open portion is at least one waist The pants-type disposable diaper according to claim 1, comprising a surrounding elastic member. Wherein the cut open portion corresponding portion of the outer sheet is made of three or more layers of nonwoven fabric, the cut open portion is made of two outer layers, not joined to the cut open portion abutting the inner layer to claim 1 or The pants-type disposable diaper according to 2. The pants-type disposable according to any one of claims 1 to 3, wherein the slit portion is cut from an exterior sheet by a perforation, and a force required to cut the perforation is 0.1 to 10 kgf / 25 mm. Diapers . The pants-type disposable diaper according to any one of claims 1 to 4, wherein the cut-opening portion is cut open from the widthwise central portion toward the side end portion, leaving the side end portion side. The pants-type disposable diaper according to any one of claims 1 to 4, wherein the slit portion is cut open from the side end portion toward the center portion in the width direction, leaving the center portion in the width direction.