JP2010154914A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a post-treatment means capable of retaining an article in the unfolded state and fixing the article in the disposal state by easy operation. <P>SOLUTION: Bag-shaped band insertion parts 81 and 82 having outlets 83 and 84 to the outer surface of the article are disposed on an abdomen-side part F and on a back-side part B at the center in the lateral direction, respectively. Both of the band insertion parts have the outlets 83 and 84 at or near the center in the longitudinal direction. The absorbent article has an elastic stretchable band 90 which extends from the front end of the abdomen-side part F, passing the outlet 83 of the band insertion part 81 in the abdomen-side part F and the outlet 84 of the band insertion part 82 in the back-side part B in this order, to the rear end of the back-side part B, and has fixing parts to be fixed to the article, disposed in the front end of the abdomen-side part F and the rear end of the back-side part B. The part between the fixing parts 87 and 88 in the band 90 can be extracted, while stretching, from the outlets 83 and 84 of the band insertion parts 81 and 82 to the outside of the article. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an absorbent article such as a disposable diaper, and more particularly to an absorbent article characterized by post-processing means for fixing the absorbent article in a rolled state at the time of disposal.

In general, absorbent articles such as disposable diapers and sanitary napkins are rounded or folded (hereinafter also referred to as a discarded state) so that the attached surface of the excrement becomes inside after use, and sealing properties such as sanitary boxes and diaper storage containers It is stored in a high storage container and temporarily stored, and when the amount stored in the container reaches a certain level, it is put in a garbage bag and discarded.
Especially in disposable diapers, as a post-processing means for fixing the absorbent article in a rolled state, it is common to provide an adhesive tape on the outer surface of the article in the pants type, and in the tape type, the tape is used as a post-processing means. It has become common to use.
However, these post-treatment means such as adhesive tape have problems that they may be peeled off when they are tightly rolled, or may stick to clothes during use. Therefore, as a solution to this, both ends of the elastic elastic band are fixed to the outer surface of the article, the band is pulled, and the rolled or folded article is passed through a ring formed by the band and the outer surface of the article. (Refer to Patent Document 1) or a part of the waistline end part is cut out except for the waistline elastic member, and this part is pulled out to form a ring, and a rolled or folded article is passed through the ring (patent Document 2) has been proposed.
JP 2002-52043 A JP-A-11-99172

However, these conventional post-treatment means can only fix the absorbent article in a discarded state, but cannot hold it in an unfolded state.
In an absorbent article, it may be necessary to maintain an unfolded state at the initial stage of post-treatment. For example, when replacing an absorbent article while the wearer is lying on his / her back or lying down like a diaper, the inner surface of the other side of the article (use surface) with one side of the article laid on the wearer's body ) Side is opened in front of the exchanger and deployed, and the excretion opening and its surroundings exposed thereby are generally wiped with a wipe or the like. In such a case, the absorbent article that is opened and unfolded toward the front tends to return to the direction of the wearer's body due to the influence of the shrinkage of the elastic expansion and contraction members provided on both sides, etc. Therefore, the exchanger performs the wiping operation in a state where the development side portion of the article is pressed, and only one hand can be used, so that workability is deteriorated. Therefore, as a whole, not only means for fixing the absorbent article in a discarded state but also means for holding it in an unfolded state are important in order to perform post-processing easily.
Therefore, a main problem of the present invention is to provide a post-processing means that can maintain an article in an unfolded state and can be fixed in a discarded state by an easy operation.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In an absorbent article comprising a liquid-permeable surface sheet, a liquid-impermeable sheet, and an absorbent body provided therebetween,
It has a ventral part extending forward from the front-rear center and a dorsal part extending rearward from the front-rear center,
A cylindrical or bag-shaped band insertion portion having an outlet to the outer surface of the article is provided in the ventral side portion and the back side portion in the central portion in the width direction of the article, respectively.
Both the band insertion parts are provided with the outlets at the center part in the front-rear direction or in the vicinity thereof,
The front end of the ventral part extends from the front end of the ventral part through the outlet of the band insertion part of the ventral part and the outlet of the band insertion part of the back part in this order to the rear end of the back part. And at the rear end of the back part, an elastic elastic band having a fixing part for the article is provided,
The portion between the fixed portions of the band is configured to be able to be pulled out of the article from the outlet of the band insertion portion while being extended.
An absorbent article characterized by the above.

(Function and effect)
In the present invention, the front end portion of the abdominal side portion and the rear end portion of the back side portion, which are the fixing destinations, are pulled out from the outlet of the band insertion portion while extending the portion between the fixing portions of the band. As a result, the article can be developed, and the state can be maintained by friction between the band and the band insertion portion. In addition, since the work is performed on the outside of the article, it is difficult to cause a situation in which hands are soiled with excrement.

  Further, from that state, the part between the fixed parts of the band is further extended as necessary, and is pulled out, and the discarded article is passed through a ring formed by the part of the band and the outer surface of the article. Thus, the article can be fixed in a discarded state, and the fixing can be reliably maintained. That is, the position of each outlet corresponds to the position of the fixing portion of the conventional band, and the band is pulled out from the range in accordance with the extension allowance (determined by the separation distance between the outlet and the fixing portion). If such a structure is adopted, it is only necessary that the exit positions of both band insertion portions are exposed to the outer surface of the article in a discarded state, and there is no limitation on the length of the band. For this reason, it can be tightened with a sufficient tension regardless of whether the disposal state size is small or large. Moreover, since the position of the band is regulated by the band insertion portion, the band is unlikely to get in the way.

  More specifically, as described above, a band and its insertion part are provided along the front-rear direction, an outlet is provided at the center part in the front-rear direction or the vicinity thereof, and a fixing part is provided at the front-rear end part. Formed with this pulled-out part and the outer surface of the article after winding it round from the front and rear end side to the front-rear direction central part side in a folded state with the side part and pulling it out from the front-rear direction center part or its vicinity A waste article can be passed through the wheel that is being used. In this way, if the product can be rolled and rolled so that the front and rear ends of the article are inside, even if excrement protrudes from the front and rear ends of the article, the outside is wrapped, so the excrement is pushed out when rolling up. Situations such as dirty hands and surroundings are less likely to occur. Furthermore, the band can be pulled out by winding either the ventral portion or the dorsal portion so as to be inside.

<Invention of Claim 2>
2. The absorbent article according to claim 1, wherein each band insertion portion has a bag shape, and an internal space thereof is continuous along the front-rear direction from at least the outlet to the fixing portion.

(Function and effect)
If the band insertion part has such a bag shape, the band is not exposed outside the outside of the outlet, so the band does not get in the way and looks good.

<Invention of Claim 3>
On the back side of the liquid-impermeable sheet, an exterior sheet constituting the outer surface of the article is provided,

The bag-shaped band insertion part is formed between the liquid-impermeable sheet and the exterior sheet,
The common opening which leads to the exit of both the band insertion part of the said ventral part and the band insertion part of the back | dorsal part is formed in the article front-back direction center part in the said exterior sheet, or its vicinity. Absorbent article.

(Function and effect)
Thus, a structure having a common opening that leads to the outlet of each insertion portion is preferable because it is easy to manufacture.

<Invention of Claim 4>
The absorbent article according to claim 3, wherein each of the exterior sheet and the band has a dynamic friction coefficient of 0.3 to 1.0.

(Function and effect)
Thus, it is preferable that the exterior sheet and the band have an appropriate dynamic friction coefficient because the above-described developed state can be more reliably maintained. In addition, the dynamic friction coefficient in this invention means the value measured based on the method as described in 3.1 of JISP8147.

<Invention of Claim 5>
The absorptive article according to claim 4 with which said band is attached without slack in the state extended 0-30% in the direction of order.

(Function and effect)
By attaching the band without loosening or slightly extending in this way, not only does the band loosen and deteriorates the appearance, it does not get in the way, but the band attaches the article to the body side with the article attached to the body. This is preferable because it also exerts an action of lifting up.

<Invention of Claim 6>
The absorbent article according to claim 5, wherein an absorbent body is provided from the abdominal side portion to the back side portion, and the fixing portion of the band is provided so that at least a part thereof overlaps the absorbent body.

(Function and effect)
Since the band fixing portion is a portion to which tension is applied at the time of disposal, it is preferably provided so as to overlap with a portion having a relatively high rigidity, that is, a portion having an absorber.

  As described above, according to the present invention, there are advantages such as a post-processing unit that can maintain an article in an unfolded state and can be fixed in a discarded state by an easy operation.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
<Example of pants-type disposable diapers>
1 to 9 show an example of a pants-type disposable 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. 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. The “front-rear direction” means the direction connecting the ventral side (front side) and the back side (rear side), “width direction” means the direction (left-right direction) orthogonal to the front-rear direction, and “up-down direction ”Means the wearing state of the diaper, that is, the direction perpendicular to the waistline when the diaper is folded in two at the crotch so that both sides of the front and back of the diaper overlap, in other words, the waist opening It means the direction connecting the WO side and the crotch side.

(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 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 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 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.

  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 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 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. A base side portion fixed to the front and rear fixing portion 67 by an adhesive or heat seal, and a tip side portion that 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%. 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 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 reversal that 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 portion” 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 9, 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 5, 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 located 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 cover to the waist side edge part of the interior body 20. As shown in FIG.

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 >.

  The exterior sheet 12 is provided with elongate elastic members 15 to 19 such as thread rubber between the sheet base materials 12S and 12H at a predetermined elongation rate in order to improve the 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 bases 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 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 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.

  In addition, a central portion in the width direction that overlaps the interior body 200 is formed between the outer surface of the inner sheet base 12H and the inner surface of the outer sheet base 12S in the lower waist portion U of the ventral portion F and the back portion B. 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.

  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. 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, and the elongated elastic expansion / contraction of the lower waistline U so that the elastic force acts on the entire widthwise direction of the lower waistline U. 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.

(Exterior sheet split structure)
In the illustrated example, the ventral portion F to the dorsal portion B are continuously covered with an integral exterior sheet 12, but the exterior sheet and the ventral exterior sheet covering the ventral side of the wearer's waist and the back 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 with a hot melt adhesive or the like, and the center in the width direction of the back side exterior sheet. The rear end part of the interior body is connected to the inner surface of the interior part by a hot melt adhesive or the like, and the form in which the abdominal exterior sheet and the back exterior sheet are not continuous on the crotch side and separated is also adopted. Can do. 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.

<Example of tape-type disposable diapers>
In the following description, “front-rear direction” means a direction connecting the ventral side (front side) and the back side (rear side), and “width direction” means a direction (left-right direction) orthogonal to the front-rear direction, “Vertical direction (vertical direction)” means the wearing state of the diaper, that is, the direction perpendicular to the waistline direction when the diaper is folded in two at the crotch so that both sides of the front and back of the diaper overlap each other In other words, it means the direction connecting the waist opening WO side and the crotch side.

  10 to 14 show an example of a tape-type disposable diaper according to the present invention. This tape-type disposable diaper is a part that extends from the lower abdomen through the crotch part to cover the buttocks along the center in the width direction, and a liquid-permeable surface sheet that forms the body-side surface, and the outer surface side An absorbent main body 10 that is a portion where the absorbent body 56 is interposed between the liquid-impermeable sheet positioned in the liquid-impervious sheet, a portion that extends to the front side and the rear side of the absorbent main body portion 10 respectively, and It has a ventral end flap part FE and a dorsal end flap part BE, which are parts that do not have the absorber 56.

  The tape-type disposable diaper includes a pair of abdominal side flap portions FF, FF extending to the outside in the width direction from the crotch portion C on both sides of the upper edge F1 side portion of the abdominal side F, and a back side B. On both sides of the upper edge B1 side portion, a pair of back side flap portions BF, BF extending to the outside in the width direction from the crotch portion C are provided. Moreover, the fastening tape 130 as a locking member is provided in the back side flap part BF and BF, respectively.

  More specifically, the entire outer surface of the absorbent main body 10 and the side flap portions BF and FF on the back side and the abdomen side is formed by the exterior sheet 12. In particular, in the absorbent main body 10, a liquid-impermeable sheet 11 is fixed to the inner surface side of the exterior sheet 12 with an adhesive such as a hot-melt adhesive, and an absorbent element is further disposed on the inner surface side of the liquid-impermeable sheet 11. 50, the intermediate sheet 40, and the top sheet 30 are laminated in this order. The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, have a slightly larger dimension in the front-rear direction and the width direction than the absorbent element 50, and are eaten from the side edges of the absorbent element 50 in the top sheet 30. The peripheral edge that protrudes and the peripheral edge that protrudes from the side edge of the absorbent element 50 in the liquid-impermeable sheet 11 are fixed by a hot melt adhesive or the like. The liquid-impermeable sheet 11 is made of a moisture-permeable polyethylene film or the like, and is formed to be slightly wider than the top sheet 30.

  Further, side barrier cuffs 60, 60 projecting (standing) on the skin side of the wearer are provided on both sides of the absorbent main body 10, and a barrier sheet forming the side barrier cuffs 60, 60 is provided. 62 and 62 are extended over the whole width direction outer side of the absorptive main-body part 10 including the inner surface of each side flap part BF and FF of back side and abdominal side.

Hereinafter, the material and characteristic parts of each part will be described in order (exterior sheet).
The exterior sheet 12 is a part that supports the absorbent element 50 and is attached to the wearer. The exterior sheet 12 has an hourglass shape in which the center part in the front-rear direction on both sides is constricted, and this is a part into which the wearer's leg is placed.

The exterior sheet 12 is preferably a non-woven fabric, but is not limited thereto. The type of the nonwoven fabric is not particularly limited, and as the material fiber, for example, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, and natural fibers such as cotton are used. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved. In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can be used. In the latter case, the nonwoven fabrics 12 are preferably bonded to each other with a hot melt adhesive or the like. When using a nonwoven fabric, the fabric weight is preferably 10 to 50 g / m ² , particularly 15 to 30 g / m ² .

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, the liquid-impermeable sheet 11 is substantially made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet, or a waterproof film. Non-woven fabrics that ensure liquid impermeability (in this case, liquid impervious sheets are composed of waterproof films and non-woven fabrics). Of course, in addition to this, a liquid-impermeable and moisture-permeable material that has been used and used in recent years from the viewpoint of preventing stuffiness can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given. In addition, non-woven fabric using micro-denier fiber, strengthening leak-proofing by reducing the voids of the fiber by applying heat or pressure, and applying water-absorbing resin or hydrophobic resin or water repellent. A sheet that is liquid-impermeable without using a film can also be used as the liquid-impermeable sheet 11.

(Surface sheet)
The top sheet 30 is sufficient if it has liquid permeability, and for example, a porous or non-porous nonwoven fabric or a porous plastic sheet can be used. 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, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.

  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.

(Intermediate sheet)
An intermediate sheet (also referred to as a second sheet) 40 can be provided between the surface sheet 30 and the absorbent element 50 in order to move excrement that has passed through the surface sheet 30 to the absorber and prevent reversal. This intermediate sheet 40 not only improves the absorption performance of the absorbent by quickly transferring the excrement to the absorber, but also prevents the excretion of the absorbed excrement from reversing from the absorber, and the surface of the top sheet 30 has a good touch. To do. The intermediate sheet 40 can be omitted.

  As the intermediate sheet 40, the same material as that of the top sheet 30 can be used. The intermediate sheet 40 is preferably bonded to the top sheet 30. When heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 40 preferably has a melting point similar to that of the top sheet 30. Further, considering the permeation of the solid content in the stool, the fineness of the fiber used for the intermediate sheet 40 is preferably 5.0 to 7.0 dtex, but the liquid residue in the top sheet 30 increases. On the other hand, when the fineness of the fiber used for the intermediate sheet 40 is 1.0 to 2.0 dtex, the liquid residue of the top sheet 30 is hardly generated, but the solid content of the stool is hardly transmitted. Therefore, it is preferable that the fiber of the nonwoven fabric used for the intermediate sheet 40 has a fineness of about 2.0 to 5.0 dtex.

  The intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbent element 50, but may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the entire length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length range centered on the region that receives the liquid.

(Side barrier cuffs)
Side barrier cuffs 60, 60 that protrude (stand up) on the use surface side are provided on both sides of the product in order to prevent urine and soft stool that move laterally on the top sheet 30 and prevent side leakage. Is preferred.

  The side barrier cuff 60 includes a barrier sheet 62 that is substantially continuous in the width direction, and an elongated elastic elastic member 63 that is fixed to the barrier sheet 62 in a stretched state along the front-rear direction. As the barrier sheet 62, a water-repellent nonwoven fabric can be used, and as the elastic elastic member 63, thread rubber or the like can be used. As shown in FIGS. 12 and 13, a plurality of elastic elastic members can be provided in addition to a plurality of elastic expansion members.

  The inner surface of the barrier sheet 62 has a fixing start end in the width direction on the side portion of the top sheet 30, and a portion on the outer side in the width direction from the fixing start end is on the side portion of the liquid-impermeable sheet 11 and on the outer side in the width direction. It fixes to the side part of the exterior sheet | seat 12 located with the hot-melt-adhesive agent etc. Out of the adhering portions, on the outer side in the width direction in the vicinity of the adhering start end, leg elastic elastic members 64 made of rubber thread or the like are provided along the front-rear direction between the sheets of the portions where the barrier sheet 62 and the exterior sheet 12 face each other. It has been.

  Around the leg, the width direction inner side of the side barrier cuff 60 is fixed on the top sheet 30 at both ends in the longitudinal direction of the product, but the portion between them is an unfixed free part. The portion comes to stand by the contraction force of the rubber thread 63. When the diaper is worn, the diaper is attached to the body in the shape of a boat, and the contraction force of the rubber thread 63 acts, so that the side barrier cuffs 60 stand up and adhere to the legs around the contraction force of the rubber thread 63. . As a result, so-called side leakage from around the legs is prevented.

  Unlike the illustrated embodiment, the front and rear direction end portions of the barrier sheet 62 on the inner side in the width direction are divided into a base end side portion extending from the outer side in the width direction to the inner side in the width direction and a center side in the width direction of the base end side portion. It is also possible to fix in a double-folded state having a distal end side portion that is folded back from the edge toward the body side and extends outward in the width direction, and the portion in between can be an unfixed free portion.

(Absorption element)
The absorption element 50 is a part that absorbs and holds liquid such as urine and loose stool. The absorbent element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The packaging sheet 58 can be omitted. The absorbent element 50 can be adhered to the inner surface of the liquid-impermeable sheet 11 via an adhesive such as a hot melt adhesive on the back surface.

(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.

(Superabsorbent polymer particles)
The absorbent body 56 preferably includes superabsorbent polymer particles. In particular, at least in the liquid receiving region, the superabsorbent polymer particles (SAP particles) are dispersed substantially throughout the thickness direction with respect to the aggregate of fibers. Is desirable.

  If there is no SAP particle in the upper part, the lower part, and the middle part of the absorber 56, or if there is very little, it cannot be said that the "absorbed throughout the thickness direction". Therefore, “distributed in the entire thickness direction” means “distributed unevenly in the upper part, the lower part, and / or the middle part of the aggregate of fibers in addition to the form“ uniformly ”distributed in the entire thickness direction. However, it is still included in the form of being dispersed in the upper, lower and middle portions. Further, a form in which some SAP particles do not enter the fiber assembly and remain on the surface thereof, and a form in which some SAP particles pass through the fiber assembly and are on the packaging sheet 58 are also excluded. It is not something.

  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 reversal that the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.

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 , not only the effect is saturated, but also the sensation of incongruity due to the excess of the superabsorbent polymer particles is given.

(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 SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene / polypropylene, etc. can be used as the material. The fiber basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  As shown in FIGS. 12 and 14, the packaging sheet 58 may be configured to wrap only the back surface and side surfaces of the layer in addition to the form of wrapping the entire absorbent body 56. Although not shown, only the upper and side surfaces of the absorbent body 56 are covered with crepe paper or a nonwoven fabric, and the lower surface is covered with a liquid-impermeable sheet such as polyethylene, and the upper surface of the absorbent body 56 is covered with crepe paper or a nonwoven fabric. For example, the lower surface may be covered with a liquid-impermeable sheet such as polyethylene (each of these materials is a component of the packaging sheet). If necessary, the absorbent body 56 may be sandwiched between two upper and lower sheets or disposed only on the lower surface, but this is not desirable because it is difficult to prevent the movement of the superabsorbent polymer particles.

(Fastening tape)
The fastening tape 130 has a base portion of a fastening base material 130C made of a nonwoven fabric, a plastic film, a polylaminated nonwoven fabric, paper or a composite material thereof attached to the diaper, and serves as a locking portion for the abdomen on the tip side portion protruding from the diaper. A hook material 130A for a mechanical fastener is provided. The hook material 130A is bonded to the fastening base material 130C by an adhesive so as not to be peeled off.

  In the diaper for infants up to about 12 months in which watery stool and soft stool are frequently excreted, which is particularly preferable to apply the present invention, the length in the width direction of the diaper among the dimensions of the attachment portion of the fastening tape 130 The length X1 is preferably 10 to 50 mm, particularly preferably 20 to 40 mm, and the longitudinal length Y1 is preferably 20 to 100 mm, particularly preferably 40 to 80 mm. Of the dimensions of the front end portion of the fastening tape 130, the length in the width direction of the diaper is preferably 30 to 80 mm, particularly preferably 40 to 60 mm, and the length (height) in the front-rear direction is 20 to 70 mm. In particular, the thickness is preferably 25 to 50 mm. In addition, when a part or all of the fastening tape 130 has a substantially tapered shape, for example, and the length in the front-rear direction and the length in the width direction are not constant, the numerical range is determined by an average value. The shape of the fastening tape 130 may be a symmetric shape such as a rectangular shape, but if it is a convex shape consisting of a wide attachment portion and an elongated tip side portion, the knob on the tip side portion is easy to pick and This is preferable because the tension between the bases of this region acts over a wide range. The hook member 130A has a large number of engaging protrusions on the outer surface side. The shape of the engaging protrusion is (A) Le-shaped, (B) J-shaped, (C) Mushroom-shaped, (D) T-shaped, (E) Double J-shaped (J-shaped And the like may be any shape. Instead of the hook material 130 </ b> A, an adhesive material layer can be provided as a locking portion of the fastening tape 130.

  When the diaper is mounted, the fastening tape is locked at a proper position on the outer surface of the abdominal side F with the back side flap portion BF being overlapped on the outside of the abdominal side flap portion FF. The position and size of the fastening portion of the fastening tape 130 can be arbitrarily determined. In diapers for infants up to about 12 months from the newborn, the locking point is a rectangular range of 20 to 80 mm in the front-rear direction and 150 to 300 mm in the width direction, and the distance in the height direction between the upper edge and the ventral upper edge is 0 ˜60 mm, particularly 20˜50 mm, and the center in the width direction of the product is preferable.

  When the fastening tape 130 is attached so that the attachment portion of the fastening tape 130 overlaps the boundary line between the back end flap portion BE and the absorbent element 50, the tension acting between the attachment portions of the right and left fastening tapes 130 when the diaper is attached. This is preferable because the back side end of the absorbent element 50 is firmly pressed against the body. Moreover, if the attachment part of the fastening tape 130 is too far from the back side end part (rear end part) of the diaper, the tension acting between the attachment parts of the left and right fastening tapes 130 when the diaper is mounted is the back side end part of the diaper. Therefore, a gap is likely to occur between the back end of the diaper and the body surface. Therefore, the length in the front-rear direction of the back end flap BE is preferably the same as or shorter than the length in the front-rear direction of the base portion of the fastening tape 130.

(Target print sheet)
It is preferable to provide a target printing sheet 74 having target printing for facilitating the locking at the locking portion of the fastening tape 130 on the ventral side F. In the case of the target printing sheet 74, when the locking portion is the hook material 130A, a large number of loop yarns on the surface of the base material sheet made of a plastic film or nonwoven fabric, or air through Non-woven fabric such as spunbond can be used, and in the case of an adhesive layer, a surface of a base sheet made of a plastic film having a smooth surface that is rich in adhesiveness can be used. . Here, the target printing is preferably performed on the base sheet.

  Further, when the fastening portion of the fastening tape 130 on the ventral side F is made of a nonwoven fabric, for example, when the exterior sheet 12 of the illustrated form is made of a nonwoven fabric, and the fastening portion of the fastening tape 130 is a hook material 130A, The target tape 74 can be omitted, and the hook material 130A can be entangled with the nonwoven fabric of the exterior sheet 12 and locked. In this case, the target print sheet 74 may be provided between the exterior sheet 12 and the liquid-impermeable sheet 11.

(End flap)
The end flap part is a part that extends to the front side and the rear side of the absorbent main body part 10 and does not have the absorber 56, and the front side extension part is the ventral end flap part FE. The extended portion on the rear side is the back end flap portion BE.

  The length in the front-rear direction of the back end flap BE is preferably the same as or shorter than the length in the front-rear direction of the attachment portion of the fastening tape 130 for the reasons described above. If it is too close, a gap is likely to be formed between the diaper dorsal side end and the body surface due to the thickness and stiffness of the absorbent body 56, so that it is preferably 10 mm or more.

  The front-rear direction lengths of the ventral end flap part FE and the back end flap part BE are preferably about 5 to 20% of the front-rear direction length L of the entire diaper, and it is particularly preferable to apply the present invention. In a diaper for infants up to about 12 months, which frequently excretes watery stool and soft stool, it is appropriate that the diameter is 10 to 60 mm, particularly 20 to 50 mm.

(Back elastic sheet)
In the illustrated embodiment, a belt-like back-side stretchable sheet 70 that elastically expands and contracts in the width direction is provided between both fastening tapes 130 to improve the fit on the back side of the diaper. Both end portions of the back-side elastic sheet 70 are preferably extended to a portion that overlaps with the attachment portions of both fastening tapes 130, but may be spaced apart in the center in the width direction. Although it is appropriate that the longitudinal dimension of the back side elastic sheet 70 is approximately the same as the longitudinal dimension of the attachment portion of the fastening tape 130, there may be a dimensional difference of about ± 20%. The back elastic sheet 70 may use a sheet-like elastic member such as a rubber sheet, but from the viewpoint of air permeability, as shown in FIG. 14, a sheet base 71 such as two nonwoven fabrics is used as a hot melt adhesive. The elastic elastic member 72 such as a perforated sheet, net, or elongated (thread or string) is stretched between the sheet base materials 71 in a state of being stretched along the width direction. What was used is used suitably. As the sheet base 71 in this case, the same one as the exterior sheet 12 can be used. It is preferable that the elastic expansion / contraction member 72 has an extension ratio of about 150 to 250%. In addition, when an elongated (stretch or string-like) member is used as the elastic elastic member 72, it is preferable to provide about 5 to 15 members having a thickness of 420 to 1120 dtex at intervals 72d of 3 to 10 mm.

  Further, as shown in the drawing, it is preferable that a part of the elastic expansion / contraction member 72 is arranged so as to cross the absorber 56, because the fit of the absorber 56 is improved. In this case, the elastic expansion / contraction member 72 is used as the absorber 56. If the contraction force is prevented from acting on a part or all of the overlapping portion by means such as cutting, the back end portion of the absorbent body 56 does not contract in the width direction, so that the fit is further improved.

  The elastic elastic member 72 may be fixed over the entire length of the sheet base material 71 in the longitudinal direction of the sheet (width direction of the diaper), but in order to prevent the sheet from shrinking or curling when attached to the diaper body, In the range of about 5 to 20 mm at the end in the front-rear direction (diaper width direction), it is preferable that the contraction force does not work or the elastic elastic member 72 does not exist.

  In the illustrated embodiment, the back-side stretchable sheet 70 is sandwiched between the barrier sheet 62 and the exterior sheet 12 on both sides in the width direction of the liquid-impermeable sheet 11 and is liquid-impermeable at a portion overlapping the liquid-impermeable sheet 11. Although provided so as to be sandwiched between the permeable sheet 11 and the absorber 56, it may be provided between the top sheet 30 and the absorber 56 or between the liquid-impermeable sheet 11 and the exterior sheet 12. It may be provided on the top sheet 30. In this case, the liquid impermeable sheet 11 may be provided on the barrier sheet 62 on both sides in the width direction. When the back-side stretchable sheet 70 is provided on the top sheet 30, and the sheet on the side that contacts the skin among the sheets constituting the back-side stretchable sheet 70 is constituted by the sweat-absorbing / moisture-releasing sheet 20 described later, the number of members is increased. Can be reduced, which is preferable. Further, when the exterior sheet 12 is formed by stacking a plurality of sheet base materials, the entire back-side stretchable sheet 70 may be provided between the sheet base materials of the exterior sheet 12.

<Embodiment of post-processing means>
Characteristically, in both types of disposable diapers, the bag-shaped band insertion portions 81 and 82 having outlets 83 and 84 to the outer surface of the article are a pair of front and rear, that is, one band insertion portion 81 at the center in the width direction of the article. Is provided in the ventral part F and the other band insertion part 82 is provided in the back part B, respectively, and the outlets 83 and 84 of the band insertion parts 81 and 82 are provided in the central part of the front and rear direction or in the vicinity thereof It has been.

  More specifically, the liquid-impermeable sheet 11 and the exterior sheet 12 are bonded to each other except for a portion that becomes a space for band insertion, so that the liquid-impermeable sheet 11 and the exterior sheet 12 In between, bag-like band insertion portions 81 and 82 are formed using both sheets as bag materials. This bonded portion is indicated by reference numerals 86, 87 and 88. Moreover, it continues in the front-back direction through the internal space of each band insertion part 81,82. In the illustrated embodiment, the internal space of the band insertion portions 81 and 82 extends linearly along the front-rear direction, but may extend along an oblique direction or extend in a curved line. May be.

  The outlets 83 and 84 of the respective band insertion portions 81 and 82 can be individually provided. However, as shown in the figure, the portion between the end portions of both the band insertion portions 81 and 82, that is, the center portion in the front-rear direction of the article or the vicinity thereof In addition, it is preferable to form common outlets 83 and 84 that communicate with the internal spaces of the band insertion portions 81 and 82. In the illustrated embodiment, the outlets 83 and 84 can be formed by punching a predetermined portion of the exterior sheet 12. Of course, the outlets 83 and 84 can be provided in other parts, or a plurality of outlets can be provided. For example, as shown in FIG. 21 and FIG. 22, when the article is provided at three locations of the abdominal portion F, the back portion B, and the front and rear direction central portion, The band 90 can be pulled out from one place where there is no mark. Although how many outlets 83 and 84 are provided is arbitrary, it is preferable to provide each outlet 83 and 84 so as to be at least 70 mm apart in the front-rear direction. The shapes of the outlets 83 and 84 can be determined as appropriate. For example, the outlets 83 and 84 may be rectangular, square, rounded corners, elliptical, circular, or slit. The dimensions of the outlets 83 and 84 may be wider or narrower than the band 90 as long as the band 90 described later can be pulled out.

  And it passes through the outlet 83 of the band insertion part 81 of the ventral part F and the outlet 84 of the band insertion part 82 of the back part B in this order from the front end part of the ventral part F to the rear end part of the back side part B. The elastic band 90 extends, and is bonded and fixed to the liquid-impermeable sheet 11 and the exterior sheet 12 at the front end portion of the ventral side portion and the rear end portion of the back side portion which are both ends thereof. The front end portion of the ventral portion and the rear end portion of the dorsal portion, and a fixing portion (hereinafter also referred to as a band fixing portion) at the position are denoted by reference numerals 87 and 88. The portion between the fixing portions 87 and 88 in the band 90 is preferably not fixed to the liquid-impermeable sheet 11 and the exterior sheet 12 by adhesion or the like, but may be fixed to be weak enough to be peeled off. The elongation allowance can be determined as appropriate, but the total sum of both elongation allowances is preferably about 100 to 400 mm. The elongation allowance is defined as the difference between the length of the band 90 that is not slack and stretched and the length of the band 90 that is pulled with a force of 5N.

  In the case of the illustrated embodiment, the band insertion portions 81 and 82 are formed symmetrically with respect to the center portion in the front-rear direction or the vicinity thereof and along the front-rear direction, respectively, and the fixing portion 87 of the ventral portion of the band 90 is the ventral portion F. The fixing portion 88 of the back side portion of the band 90 is provided at the rear end portion of the back side portion B. In particular, from the viewpoint of manufacturability, the front and rear ends of the band 90 are preferably positioned at the front and rear ends of the diaper in the case of the tape type, and the front and rear ends of the band 90 are the front and rear of the interior body 200 in the case of the pants type. It is preferably located at the end. That is, when attaching a member such as the band 90 in a general manufacturing method, after supplying a continuous band and attaching it to an attachment target (for example, the liquid-impermeable sheet 11 or the exterior sheet 12), individual products or When cutting into semi-finished products, it is preferable to use the cutting to cut at the same time. In the case of a tape-type disposable diaper, the front-rear direction of the diaper coincides with the flow direction of the production line, and the product is cut into individual products by cutting along the boundary of the front-rear end of the diaper at the final stage. Therefore, after attaching the continuous band along the line flow direction, the band can be cut using cutting into individual products. In this case, the front and rear ends of the band 90 are positioned at the front and rear ends of the diaper. To come. On the other hand, in the case of a pants-type disposable diaper, the width direction of the diaper coincides with the flow direction of the production line in the line for cutting into individual products. In the case of disposing, the band cannot be cut by using cutting to individual products. However, in a general manufacturing method of a pants-type disposable diaper, the interior body is manufactured on a separate line, and in this case, the front-rear direction of the interior body coincides with the flow direction of the production line, and the individual directions in that direction are the same. The interior body is cut. Therefore, after attaching the continuous band along the line flow direction in this interior body line, it is possible to cut the band using cutting into individual interior bodies. It comes to be located in the front-back end of the interior body 200.

  Further, since the band fixing portions 87 and 88 are portions to which tension is applied at the time of disposal, at least a portion (preferably an area of 50% or more) is a portion having a relatively high rigidity, that is, a portion having the absorber 56. It is preferable to be provided so as to overlap.

  Furthermore, although the band 90 may be attached with slack, there is a possibility that it may get in the way or look bad. Therefore, it is preferable that the band 90 is attached without slack in a state where the band 90 extends in the longitudinal direction by 0 to 30%, and more preferably attached in a state where the band 90 extends by 10 to 20%. By attaching the band 90 without loosening or slightly stretched, the band 90 will not loosen and deteriorate in appearance and will not get in the way. It will also work to lift up. In addition, when the band 90 is loose or the elongation rate is too low, it is difficult to attach the band 90 at the time of manufacture. When the elongation rate exceeds 30%, the article is shrunk, and the wearer's body It becomes difficult to fit.

  As the band 90, a band-shaped member as shown in the figure can be used. Examples of the band-shaped band (elastic sheet) include an elastic film and an elastic nonwoven fabric, and the width is arbitrary, but about 10 to 40 mm is appropriate. Further, not only a belt shape but also a string shape or a thread shape can be used, and a sheet-like elastic member such as a rubber sheet may be used as it is. However, from the viewpoint of air permeability, as shown in FIG. A sheet base 91 such as a non-woven fabric having a thickness of about 40 mm is laminated with an adhesive such as a hot melt adhesive, and a perforated sheet-like, net-like, or elongated shape (thread-like or string-like) between the two sheet bases 91 Etc.) and the like which are fixed in a stretched state along the longitudinal direction can be suitably used. As the sheet base 91 in this case, the same one as the exterior sheet 12 can be used. It is preferable that the elastic expansion / contraction member 92 has an extension ratio of about 150 to 250%. Further, when an elongated member (thread-like or string-like) is used as the elastic expansion / contraction member 92, it is preferable to provide about 2 to 6 pieces having a thickness of about 470 to 940 dtex in parallel with an interval of 3 to 8 mm. .

  The post-processing procedure in the disposable diaper configured as described above will be described by taking a tape-type diaper as an example. First, in order to hold the diaper in an unfolded state, from the opening 85, between the fixing portions 87 and 88 in the band 90. Pull the part out while stretching. Accordingly, as shown in FIG. 23, the front end portion of the ventral portion F and the rear end portion of the dorsal portion B are pulled outward, and as a result, the diaper is in an unfolded state, and the band 90 and the band insertion portion 81, The state is maintained by friction with 82. In addition, since the work is performed on the outside of the article, it is difficult to cause a situation in which hands are soiled with excrement. In this state, the exposed wearer's excretion opening and its periphery can be easily wiped with a wipe or the like.

  After such wiping, in order to put the diaper into a discarded state, from the unfolded state, the diaper is folded in two with the inner surfaces of the ventral portion F and the dorsal portion B of the diaper, as shown in FIG. Wind and roll in order from the waist side so that either F or the back portion B is inside. Reference sign DP indicates a diaper in a rolled state. In this state, the opening 85 leading to the outlets 83 and 84 is exposed on the outer surface. Next, as shown in FIG. 16, the portion between the fixing portions 87 and 88 in the band 90 is pulled out from the opening 85 while being further extended as necessary, and this pulled-out portion is shown by a two-dot chain line arrow. And pass the discarded article through a ring formed by the outer surface of the article. Accordingly, as shown in FIGS. 17 and 18, the article can be fixed in a discarded state, and the fixing can be reliably maintained. By appropriately changing the pull-out length of the band 90, the band 90 can be tightened with a sufficient tension regardless of whether the disposal state dimension is small or large. Further, since the band insertion portions 81 and 82 are formed in a bag shape and the band 90 is not exposed outside the outside of the outlet, the band 90 does not get in the way and the appearance is improved. In particular, as shown in the figure, the band 90 and its insertion portions 81 and 82 are provided along the front-rear direction, and the outlets 83 and 84 are provided in the front-rear direction center or in the vicinity thereof, so that the end on the waist side is the inner side. If it can be rolled up and rolled up, even if excrement protrudes from the edge of the waist, the outside is wrapped, so when excavating the excrement, the hands and surroundings will be soiled It becomes difficult. Furthermore, the band can be pulled out by winding either the ventral portion F or the dorsal portion B so as to be inside.

  As shown in FIG. 22, a plurality of bands 90 can be provided. In this case, a plurality of bands 90 can be bundled or provided in parallel. However, as shown in the example in the figure, the area between the outlets 83 and 84 is made to be radial with the portion between the outlets 83 and 84 as the center. It is preferable that the portions 90 are attached so as to intersect with each other at an angle of less than 90 degrees because the expansion and contraction force of the band 90 can be applied over a wider range, and the portion that opens in the discarded state is reduced.

  Further, when the band 90 and the exterior sheet 12 each have a coefficient of dynamic friction of 0.3 to 1.0, the friction between the exterior sheet 12 and the band 90 when the article is developed by pulling the band 90 forward. It is preferable because the state in which the article is developed by resistance can be maintained satisfactorily. In addition, the dynamic friction coefficient in this invention means the value measured based on the method as described in 3.1 of JISP8147.

In the above example, the band insertion portions 81 and 82 are formed using a diaper member, but a separately formed cylindrical body or bag body may be attached to the outer surface of the diaper.
Moreover, in the said example, although the band insertion parts 81 and 82 were formed in the bag shape, as shown in FIG.19 and FIG.20, it can also be made into a cylinder shape. In the illustrated example, the sheet base material is disposed on the outer surface of the diaper (in this case, the outer surface of the exterior sheet 12) with a space in the front-rear direction, and both ends in the width direction of each sheet base material are attached to the outer surface of the diaper with an adhesive or the like. The cylindrical part which consists of the part between sheet | seat fixing | fixed part 89,89 of each sheet | seat base material and the diaper outer surface is used as the band insertion part 81,82. In this case, the openings 83 and 84 on the opposite side to the band fixing portions 87 and 88 among both openings of the cylindrical portion constitute the outlet of the present invention. Even with such cylindrical band insertion portions 81 and 82, there is almost no functional change from the bag-shaped one described above except that the band 90 is largely exposed.

  The present invention is suitable for a pants-type disposable diaper or a tape-type disposable diaper as in the above example, but can also be applied to an absorbent pad or the like.

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 the line 4-4 in FIG. 1. 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 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 top view in the state where the diaper was developed showing the inner surface of a tape type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 13 is a sectional view taken along line 7-7 in FIG. It is the 8-8 sectional view taken on the line of FIG. It is a figure which shows a post-processing procedure. It is a figure which shows a post-processing procedure. It is a figure which shows a post-processing procedure. It is a figure which shows a post-processing procedure. It is a top view in the state where the diaper was developed showing the outer surface of other tape type disposable diapers. FIG. 20 is a sectional view taken along line 9-9 in FIG. 19. It is a top view in the state where the diaper was developed showing the outer surface of other tape type disposable diapers. It is a top view in the state where the diaper was developed showing the outer surface of other tape type disposable diapers. It is the schematic which shows the temporarily fixed state in the case of diaper replacement | exchange.

Explanation of symbols

  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, 81, 82 ... band insertion part, 83, 84 ... outlet, 87, 88 ... band fixing part, 90 ... band.

Claims (6)

In an absorbent article comprising a liquid-permeable surface sheet, a liquid-impermeable sheet, and an absorbent body provided therebetween,
It has a ventral part extending forward from the front-rear center and a dorsal part extending rearward from the front-rear center,
A cylindrical or bag-shaped band insertion portion having an outlet to the outer surface of the article is provided in the ventral side portion and the back side portion in the central portion in the width direction of the article, respectively.
Both the band insertion parts are provided with the outlets at the center part in the front-rear direction or in the vicinity thereof,
The front end of the ventral part extends from the front end of the ventral part through the outlet of the band insertion part of the ventral part and the outlet of the band insertion part of the back part in this order to the rear end of the back part. And at the rear end of the back part, an elastic elastic band having a fixing part for the article is provided,
The portion between the fixed portions of the band is configured to be able to be pulled out of the article from the outlet of the band insertion portion while being extended.
An absorbent article characterized by the above.   2. The absorbent article according to claim 1, wherein each band insertion portion has a bag shape, and an internal space thereof is continuous along the front-rear direction from at least the outlet to the fixing portion. On the back side of the liquid-impermeable sheet, an exterior sheet constituting the outer surface of the article is provided,
The bag-shaped band insertion part is formed between the liquid-impermeable sheet and the exterior sheet,
The common opening which leads to the exit of both the band insertion part of the said ventral part and the band insertion part of the back | dorsal part is formed in the article front-back direction center part in the said exterior sheet, or its vicinity. Absorbent article.   The absorbent article according to claim 3, wherein each of the exterior sheet and the band has a dynamic friction coefficient of 0.3 to 1.0.   The absorptive article according to claim 4 with which said band is attached without slack in the state extended 0-30% in the direction of order.   The absorbent article according to claim 5, wherein an absorbent body is provided from the abdominal side portion to the back side portion, and the fixing portion of the band is provided so that at least a part thereof overlaps the absorbent body.

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