JP5060735B2 - Absorbent articles - Google Patents

Description

  The present invention relates to a tape-type disposable diaper.

Absorbent articles such as infant and adult tape-type and pants-type disposable diapers, sanitary napkins, top sheets on the use side, liquid-impermeable sheets that prevent the permeation of liquid on the back side, and these sheets The basic element is an absorption element that intervenes and receives and holds excretory fluid that has passed through the top sheet (see, for example, Patent Document 1).
For this basic element, an outermost sheet made of, for example, a non-woven fabric is provided on the back side of the liquid-impermeable sheet, and a form that improves the touch when a plastic sheet is used as the liquid-impermeable sheet, so-called both sides of the product In order to improve the fit around the waist and the abdomen, such as a form for forming a barrier cuff, a form for imparting elastic stretchability is appropriately added.
JP 2004-65300 A Special Table 2002-524399 (WO99 / 27879) JP-T-2004-500165 (US Pat. No. 6,646,180)

However, conventionally, when the outermost surface sheet is fixed to the inner surface side sheet such as a back sheet or in other processes such as cutting, wrinkles appearing on the outer surface of the product may occur due to expansion and contraction of the material. It was. Such wrinkles that occur accidentally in the manufacturing process are not preferable because they are irregular in size, direction, or position, and even if they have no functional problem, they contribute to lowering the product value.
Moreover, conventionally, technical development for minimizing wrinkles has been made, such as using a material with little elongation. However, in addition to not being able to completely eliminate wrinkles, there have been limitations such as narrowing the choice of materials.
Therefore, a main problem of the present invention is to prevent the product value from being lowered by the wrinkles that are inevitably generated in production.

  The present invention that has solved the above-mentioned problems is an incidental and unavoidable in manufacturing by changing the way of thinking to the conventional way of trying to eliminate wrinkles and by actively wrinkling the inner side sheet or the outermost sheet. It is intended to make the wrinkles generated in

<Invention of Claim 1>
An outermost sheet made of non-woven fabric, an inner surface side sheet made of a body fluid impermeable sheet fixed to the inner surface of the outermost sheet, and an absorber provided on the inner surface side of the inner surface side sheet;
Fastening pieces having hook elements are provided at both end portions on the back side or the abdominal side, and the hook elements of the fastening pieces are attached to the outermost sheet on the opposite side of the dorsal side and the abdominal side from the side having the fastening pieces, In the tape-type disposable diaper configured to engage with the outer surface of the overlapping portion of the inner side sheet,
The outermost surface sheet and the inner surface side sheet are bonded by an adhesive at an adhesive portion provided in a plurality of rows continuously in the width direction of the diaper and spaced in the front-back width direction of the diaper, and is not bonded between the adhesive portions. Part is formed,
The outermost sheet and the inner sheet are folded together in a form in which the outermost sheet and the inner sheet both bulge outward from the bonded part in the non-bonded part over the entire overlapping part of the outermost sheet and the inner sheet. In addition, an unevenness is formed on the outermost surface sheet by the wrinkles of the inner surface side sheet, or the non-adhesive portion of the outermost surface sheet swells away from the inner surface side sheet due to contraction of the inner surface side sheet. The outermost sheet is gathered,
This is a tape-type disposable diaper.

(Function and effect)
In the invention described in this section, wrinkles are positively formed on the inner surface side sheet to form wrinkle-like irregularities on the outermost sheet, thereby making the wrinkles that are accidentally and unavoidably produced inconspicuous. Further, the presence of the wrinkles on the inner surface side sheet and the concavities and convexities of the outermost surface sheet associated therewith brings about a flexible appearance and feel. Furthermore, as will be apparent from the manufacturing method described later, since the elongation of the material does not become a problem, the choice of the material is widened, and a material that is soft and easily stretchable can be used.

  Further, the combination of sheets as described in this section is widely used for absorbent articles in general, and is preferable because the present invention can be easily applied without requiring a special design change.

  On the other hand, wrinkles that are accidentally and inevitably generated in production can be made inconspicuous by actively bringing wrinkles to the outermost sheet by using the shrinkage of the inner sheet. In this case, the presence of wrinkles on the outermost sheet provides a flexible appearance and feel. Furthermore, as will be apparent from the manufacturing method described later, since the elongation of the material does not become a problem, the choice of the material is widened, and a material that is soft and easily stretchable can be used.

<Invention of Claim 2>
The tape-type disposable diaper according to claim 1, wherein the adhesive portion between the outermost sheet and the inner sheet is provided with an interval of 1 to 10 mm.

  Adhesion in such a direction and interval is preferable because many regular and fine wrinkles and irregularities are formed, and both aesthetics and flexibility are improved. In particular, it is preferable that the bonding is performed continuously along the width direction of the diaper because manufacturing is easy and the appearance is excellent.

<Invention of Claim 3>
The engagement portion of the hook element in the outermost surface sheet is configured such that durability against peeling of the hook element is higher than that of the non-engagement portion of the hook element.
The tape-type disposable diaper according to claim 1 or 2.

(Function and effect)
Among the absorbent articles, when the above-described irregularity forming process of the present invention including the engagement portion is applied to the tape-type disposable paper diaper that engages the hook element with the outermost surface sheet itself made of nonwoven fabric, the engagement portion The durability against peeling of the hook element at the time is reduced. As a result, the nonwoven fabric fibers entangled with the hook element at the time of fastening may come off with the peeling of the hook element, or the peeling force may act on the outermost sheet with the peeling of the hook element, and the inner side sheet may be peeled off. There was a possibility that the situation occurred and it would be difficult to fix repeatedly or the outermost sheet could be torn.
For this problem, it is possible to increase the overall durability of the overlapping part of the outermost sheet and the inner sheet, but in that case, the material cost and manufacturing cost increase drastically, or most of the outer surface of the product There arises a problem that the texture is lost.
Therefore, in the invention described in this section, the durability of the engaging portion of the hook element in the outermost surface sheet is configured to be higher than that of the non-engaging portion of the hook element.
As is clear from this explanation, the term “durability” in the present invention means that the nonwoven fabric fibers are not easily pulled off due to the peeling of the hook elements, and that the outermost sheet is difficult to peel from the inner surface side sheet (peeling). Strength).

<Invention of Claim 4>
The application pattern of the adhesive for forming the adhesive portion is a pattern in which a plurality of rows of adhesive lines that are continuous in the diaper width direction are provided at a predetermined interval, and the width of the adhesive line at the engagement location is 0.00. 1 to 3 mm, and an area of 90% or more of the engagement portion is bonded,
By making at least one of the application pattern and the application amount of the adhesive different between the engagement part and the non-engagement part of the hook element, the durability at the engagement part of the hook element is made independent of the hook element. The tape-type disposable diaper according to claim 3, which is higher than the joint location.

(Function and effect)
When the outermost surface sheet and the inner surface side sheet are intermittently bonded during the unevenness forming process of the present invention, the adhesive is used, and the durability of the hook element at the engagement position due to the difference in the application pattern and application amount of the adhesive It is preferable to improve the surface and the texture of the outer surface while suppressing changes in the appearance and the outer surface sheet, and the outermost sheet can be easily peeled off.

  The adhesive application pattern is preferably a linear pattern as described in this section. In this case, if the total adhesion area at the engagement location is less than 90%, it becomes difficult to improve durability, If the line width or point area is too narrow, it will be difficult to improve durability regardless of the total application area and amount, and if the line width or point area is too wide, it will be difficult to form irregularities and the texture will deteriorate. It becomes easy. Therefore, the range described in this section is preferable. The “scattered dot shape” includes both regularly arranged and irregularly scattered.

<Invention of Claim 5>
The tape-type disposable diaper according to claim 3, wherein heat embossing is applied to an engagement portion of the hook element in the outermost sheet, and heat embossing is not applied to the non-engagement portion.

(Function and effect)
As another means for improving durability, heat embossing as described in this section can also be employed. In this case, not only the durability is improved by compaction, material fusion, and the like, but also a difference in appearance occurs, so that the function of displaying the engagement portion is also exhibited.

  As described above, according to the present invention, there are various advantages such as prevention of a decrease in product value due to defects that are inevitably generated in production.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
<Examples of pants-type disposable diapers>
FIG. 1 shows an example of a pants-type disposable diaper. The pants-type disposable diaper 10 includes an exterior sheet 12 on the outer surface (back surface) side and an absorbent main body 20 on the inner surface (front surface) side, and the absorbent main body 20 is fixed to the exterior sheet 12. The absorptive main body 20 is a portion that receives and absorbs and retains body fluids such as urine and loose stool (menstrual blood in a sanitary napkin described later). The exterior sheet 12 is a part for mounting on the wearer.

  The exterior sheet 12 has, for example, an hourglass shape as shown in the figure, and both sides are constricted, and this is a part into which a wearer's leg is put. The absorptive main body 20 can take any shape, but is rectangular in the illustrated form.

  As shown in FIG. 2, the exterior sheet 12 is folded back and forth after the absorbent main body 20 is installed and fixed at a predetermined position, and joined regions 12A on both sides of the front body 12F and the back body 12B of the exterior sheet 12. Are joined by heat fusion or the like. Thereby, a pants-type disposable diaper having a structure shown in FIG. 1 and having a waist opening WO and a pair of leg openings LO is obtained.

  An intermediate width in the longitudinal direction of the absorbent main body 20 shown in the drawing (that is, the vertical direction in FIG. 2, which is also the front-rear direction of the product) is shorter than the width connecting the constricted portions of the exterior sheet 12. This width relationship may be reversed or the same width.

  The exterior sheet 12 is preferably formed by laminating two sheets as shown in the figure, and an elastic elastic member 12C is interposed between these sheets so that the outer sheet 12 can be fitted to the wearer by the contraction force. As a material of the exterior sheet 12, for example, a water-repellent nonwoven fabric can be used. Further, as the elastic elastic member, thread rubber or elastic foam band can be used, but it is desirable to use a large number of thread rubbers. In the illustrated embodiment, the rubber threads 12C, 12C,... Are provided continuously in the width direction in the waist region W, provided only on both sides in the lower waist region U, and not provided in the crotch region L. Since the rubber threads 12C, 12C,... Are provided in both the waist region W and the lower waist region U, even if the shrinkage force of the rubber thread 12C itself is weak, the rubber waist 12C hits the wearer in the lower waist region U as a whole. The product fits well to the wearer.

(Absorbent body)
As the absorptive main body 20, as shown in FIG. 3, one having a top sheet 30 made of, for example, a non-woven fabric that allows body fluid to permeate and an absorbent element 50 in order from the use surface side can be used. Normally, a body fluid impermeable sheet 70 made of a plastic sheet or the like is provided on the back side of the absorbent element 50. The back side of the body fluid impermeable sheet 70 is joined to the body side surface of the exterior sheet 12. In addition, an intermediate sheet (second sheet) 40 can be provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer body fluid that has passed through the top sheet 30 to the absorbent element 50. Furthermore, in order to prevent excrement from leaking on both sides of the absorption part 20, barrier cuffs 60, 60 standing on both sides of the absorption part 20 can be provided.

(Top sheet)
The top sheet 30 has a property of transmitting body fluid. Accordingly, the material of the top sheet 30 is sufficient if it exhibits this body fluid permeability, 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, 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.
The top sheet 30 may be composed of a single sheet or 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)
In order to quickly transfer the body fluid that has permeated through the top sheet 30 to the absorbent body, an intermediate sheet 40 that is generally referred to as a “second sheet” that has a higher body fluid permeation rate than the top sheet 30 can be provided. The intermediate sheet 40 not only improves the absorption performance by the absorbent body by quickly transferring the body fluid to the absorbent body, but also prevents the “reversal” phenomenon of the absorbed body fluid from the absorbent body, and 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 materials as the top sheet 30, spunlace, pulp nonwoven fabric, a mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric and a spunbond nonwoven fabric are preferable.
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 body fluid. A typical material for the intermediate sheet 40 is a nonwoven fabric having excellent body fluid permeability.

(Body fluid impermeable sheet)
The body fluid impermeable sheet 70 simply means a sheet disposed on the back surface side of the absorber 56, and in the present embodiment, is a sheet in which the absorber 56 is interposed between the top sheet 30. Therefore, the material of the main body liquid impermeable sheet is not particularly limited. Specifically, for example, an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, a nonwoven fabric that substantially ensures liquid impermeability by interposing a waterproof film (in this case, A body fluid impermeable sheet is comprised with a waterproof film and a nonwoven fabric.) Etc. can be illustrated. Of course, in addition to this, materials having liquid impermeability and moisture permeability, which have 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 thereof include a microporous sheet obtained by liquid and a liquid-impermeable ultrafine fiber nonwoven fabric such as an SMS nonwoven fabric.
The body fluid impervious sheet 70 can be prevented from side leakage of body fluid by extending it to the use surface in a so-called forehead form (not shown). This is prevented by interposing a second body fluid impermeable sheet 72 between the double barrier sheets 64 forming 60. According to this embodiment, since the second body fluid impermeable sheet 72 extends until the barrier cuff 60 stands up, the body fluid diffused laterally through the top sheet 30 and the side of the soft stool between the barrier cuffs 60, 60 There is also an advantage that leakage can be prevented.
The bodily fluid impermeable sheet 70 can be provided with a display section for a product name, a function description, a character, a pattern, and the like, and this display section may have a notification function for informing that urination has occurred.

(Barrier cuffs)
Barrier cuffs 60, 60 provided on both sides of the product are provided to prevent urine and soft stool that travel laterally along the top sheet 30 and prevent side leakage. It is.
The illustrated barrier cuff 60 is a doubled water-repellent non-woven sheet, and is formed so as to protrude from the back side of the absorbent body 56 to the lower side of the top sheet 30 and to protrude to the front side. Yes. In order to prevent urine moving in the lateral direction along the top sheet 30, in particular, the side part of the body fluid impermeable sheet 70 is inserted between the double nonwoven fabric sheets, and the barrier cuff 60 protruding from the surface side is provided. It extends halfway.
The shape of the barrier cuff 60 itself can be designed as appropriate. However, in the example shown in the drawing, an elastic elastic member, for example, a rubber thread 62 is fixed to the tip and middle of the protruding portion of the barrier cuff 60 under stretch, The barrier cuff 60 stands up due to the contraction force in use. As shown in FIG. 3, the base side of the barrier cuff 60 is positioned so that the middle rubber thread 62 is positioned at the center side of the front rubber thread 62, 62 and fixed to the front and rear end portions of the top sheet 30. It rises diagonally toward the center side, and the tip part stands up diagonally outward from the intermediate part.

(Absorption element)
The absorbent element 50 includes an absorbent body 56 and a covering sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The covering sheet 58 can be omitted. Further, in the illustrated embodiment, the holding sheet 80 is provided between the absorber 56 and the back surface side portion (lower part) of the covering sheet 58, but the holding sheet 80 may be omitted.

(Absorber)
As the absorbent body 56, in addition to the fiber piled with short fibers such as cotton-like pulp, those made of aggregates of filaments 52, 52.

  The aggregate of filaments 52, 52... Can be obtained by opening a tow (fiber bundle). Examples of tow fibers include polysaccharides or derivatives thereof (cellulose, cellulose ester, chitin, chitosan, etc.), synthetic polymers (polyethylene, polypropylene, polyamide, polyester, polylactamamide, polyvinyl acetate, etc.). In particular, cellulose esters and cellulose are preferable.

  As cellulose, cellulose derived from plants such as cotton, linter, and wood pulp, bacterial cellulose, and the like can be used. Regenerated cellulose such as rayon may be used, and the regenerated cellulose may be a spun fiber.

  Examples of cellulose esters that can be suitably used include organic acid esters such as cellulose acetate, cellulose butyrate, and cellulose propionate; mixed acid esters such as cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, and cellulose nitrate acetate. And cellulose ester derivatives such as polycaprolactone-grafted cellulose ester can be used. These cellulose esters can be used alone or in admixture of two or more. The viscosity average degree of polymerization of the cellulose ester is, for example, about 50 to 900, preferably about 200 to 800. The average substitution degree of the cellulose ester is, for example, about 1.5 to 3.0 (for example, 2 to 3).

  The average degree of polymerization of the cellulose ester can be, for example, 10 to 1000, preferably 50 to 900, more preferably about 200 to 800, and the average degree of substitution of the cellulose ester is, for example, about 1 to 3, preferably 1 to 1. 2.15, more preferably about 1.1 to 2.0. The average degree of substitution of the cellulose ester can be selected from the viewpoint of enhancing biodegradability.

  As the cellulose ester, an organic acid ester (for example, an ester with an organic acid having about 2 to 4 carbon atoms), particularly cellulose acetate is suitable. The degree of acetylation of cellulose acetate is often about 43 to 62%, but about 30 to 50% is particularly preferable because it is excellent in biodegradability. A particularly preferred cellulose ester is cellulose diacetate.

  The tow constituent fiber may contain various additives such as a heat stabilizer, a colorant, an oil agent, a yield improver, a whiteness improver, and the like.

  The fineness of the tow constituting fiber is, for example, 1 to 16 denier, preferably 1 to 10 denier, and more preferably 1 to 6 denier. The tow constituent fiber 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. When crimped fibers are used, a bulky and light absorbent body can be produced, and a tow with high unity can be easily produced by entanglement between the fibers. The cross-sectional shape of the tow constituting fiber is not particularly limited, and may be any one of, for example, a circular shape, an oval shape, an irregular shape (for example, a Y shape, an X shape, an I shape, an R shape) or a hollow shape. Also good. The tow constituting fibers are used in the form of tows (fiber bundles) formed by bundling, for example, about 1,000 to 1,000,000, preferably about 2,000 to 1,000,000 single fibers. can do. The fiber bundle is preferably formed by bundling about 1,000 to 1,000,000 continuous fibers.

Cellulose diacetate tow bales that can be suitably used in the present invention are commercially available from Celanese and Daicel Chemical Industries. Cellulose diacetate tow bale has a density of about 0.5 g / cm ³ and a total weight of 400-600 kg. From this bale, the tow is peeled off and spread into a wide band so as to have a desired size and bulk. The opening width of the tow is arbitrary, and can be, for example, a width of 50 to 2000 mm, preferably about 50 to 300 mm, which is the width of the product absorber. Moreover, the density of an absorber can be adjusted by adjusting the degree of tow opening.

  Preferably, as shown in FIG. 3, superabsorbent polymer particles 54, 54. It is desirable that the superabsorbent polymer particles (SAP particles) are dispersed substantially in the entire thickness direction with respect to the aggregate of the filaments 52, 52. The state of being substantially dispersed throughout the thickness direction is conceptually shown as an enlarged view of the main part of FIG.

  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, lower, and / or middle portions of the aggregate of filaments, 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 aggregate of the filaments 52, 52... Remain on the surface, and some SAP particles pass through the aggregate of the filament filaments 52, 52. The form on the sheet 58 and the form on the holding sheet 80 as shown in FIG. 6 are not excluded.

(Superabsorbent polymer particles)
The superabsorbent polymer particles 54 include “powder” in addition to “particles”. As the particle diameter of the superabsorbent polymer particles 54, those used for 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 54 can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. Examples of the superabsorbent polymer particles 54 include starch-based, cellulose-based and synthetic polymer-based ones, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, sodium carboxymethylcellulose A cross-linked product or an acrylic acid (salt) polymer can be used. The shape of the superabsorbent polymer particles 54 is preferably a granular material that is usually used, but other shapes can also be used.

  As the superabsorbent polymer particles 54, those having a water absorption speed of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the body fluid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.

  Moreover, as the superabsorbent polymer particles 54, 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 stickiness after a bodily fluid absorption can be suppressed effectively.

The basis weight of the superabsorbent polymer particles 54 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 . By setting the basis weight of the polymer to 50 g / m ² or less, it is possible to prevent the lightening effect from being hardly exhibited by adopting the synthetic continuous fiber due to the weight of the polymer. If it exceeds 350 g / m ² , not only will the effect be saturated, but an excessively high superabsorbent polymer particle 54 will give a sense of incongruity.

  If necessary, the superabsorbent polymer particles 54 can adjust the spray density or spray amount in the plane direction of the absorber 56. For example, the body fluid excretion site can be applied in a larger amount than 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.

  If necessary, as the superabsorbent polymer particles 54, a plurality of particles having different particle size distributions are prepared, sequentially supplied in the thickness direction, those having a small particle size distribution on the lower side in the absorber 56, and particles having a large particle size distribution on the upper side. Things can be distributed.

  The ratio between the superabsorbent polymer particles 54 and the continuous fibers determines the absorption characteristics. As a weight ratio in a planar area of 5 cm × 5 cm in the region directly receiving the body fluid in the absorbent body 56, it is desirable that the superabsorbent polymer particle / continuous fiber weight is 1 to 14, particularly 2 to 9.

(Enveloping sheet)
When the covering 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 instead 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 basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .
As shown in FIG. 3, the covering sheet 58 wraps only the back and side surfaces of the layer of the continuous fibers 52, 52... And the superabsorbent polymer particles 54, 54. It may be covered. Although not shown, only the upper and side surfaces of the absorbent body 56 are covered with crepe paper or nonwoven fabric, and the lower surface is covered with a body fluid-impermeable sheet such as polyethylene, and the upper surface of the absorbent body 56 is covered with crepe paper or nonwoven fabric. For example, the lower surface may be covered with a body fluid impermeable sheet such as polyethylene (each of these materials becomes a component of the covering sheet). If necessary, the aggregate of continuous fibers 52, 52... And the layer of superabsorbent polymer particles 54, 54... May be sandwiched between two upper and lower sheets or disposed only on the lower surface. This is not a desirable form because it is difficult to prevent the movement of particles.

(Holding sheet)
In the case where the holding sheet 80 is provided, the superabsorbent polymer particles 54 can be interposed between the holding sheet 80 and the absorbent body 56 by spraying or the like. The superabsorbent polymer particles 54 may pass through the aggregate of continuous fibers 52 at the time of supply to the aggregate of continuous fibers 52 or in a subsequent process, or in a distribution process until use by a consumer. The unevenness of the superabsorbent polymer particles that have passed through the aggregate of continuous fibers gives a sense of incongruity when touched by the hand when the consumer uses it. Therefore, it is also a preferable form that a holding sheet 80 having a holding performance of the superabsorbent polymer 54 is interposed between the absorbent body 56 and the covering sheet 58. The holding sheet 80 reinforces the stiffness that is not sufficient only by the covering sheet 58 such as tissue paper (crepe paper), and reduces or prevents a sense of incongruity when touched by the hand when the consumer uses it.

  The material of the holding sheet 80 is not particularly limited as long as it has a holding performance of the superabsorbent polymer 54. Specifically, for example, non-woven fabric, crimped pulp, low-absorbency cotton fiber (for example, non-degreased cotton fiber, degreased cotton fiber, rayon fiber treated with a water repellent or a hydrophobizing agent, etc.). ), Polyethylene fiber, polyester fiber, acrylic fiber, polypropylene fiber, silk, cotton, hemp, nylon, polyurethane, acetate fiber and the like.

If the holding sheet 80 and the nonwoven fabric, its holding sheet 80, the compression energy 0.01~10.00gfcm / cm ² based on KES test, preferably, at 0.01~1.00gfcm / cm ^2, and compressed The non-woven fabric has a resilience of 10 to 100%, preferably 70 to 100%.

  The reason for providing the holding sheet 80 is to hold, for example, the superabsorbent polymer 54 that has fallen down (dropped out) from the absorbent body 56 as described above. Therefore, since the superabsorbent polymer particles 54 that have come out come into contact with the user via the covering sheet 58 and the holding sheet 80, there is no possibility of being transmitted to the user as a sense of incongruity. In particular, when the nonwoven fabric has the above-described compression energy and compression resilience, its function is sufficiently exhibited.

  Further, since the superabsorbent polymer 54 that has slipped out is held by the holding sheet 60 and does not move on the covering sheet 58, there is no possibility of uneven distribution of absorption capacity. In particular, in order to prevent the superabsorbent polymer particles 54 from moving on the holding sheet 80, an adhesive hot melt adhesive or the like can be applied on the holding sheet 80 in advance. Alternatively, the upper surface of the holding sheet 80 (surface toward the use surface side) may be a rough surface to prevent the superabsorbent polymer particles 54 from moving on the holding sheet 80. Examples of the roughening or fluffing means for this purpose include a non-net surface that is not a net surface during the production of the nonwoven fabric, a marble process, a needle punch process, and a brushing process.

  The holding sheet 80 may be provided only below the absorber 56 as shown in FIG. 3 or the like, or may be wound up and extended to the upper surface of the absorber 56 through the side surface of the absorber 56 (not shown). . It is also possible to use a plurality of holding sheets 80 in a stacked manner.

  The above example is an example in which the holding sheet 58 is provided between the absorber 56 and the back side portion of the covering sheet 58, but the holding sheet may be on the back side from the covering sheet (the form is shown in the figure). In short, if a holding sheet is provided on the back side with respect to the absorbent body 56, it is possible to reduce or not cause a crisp discomfort when touching from the back side of the product.

(Embossing)
You may form the recessed part E by embossing from the surface side of the top sheet 30 to the thickness direction. In this case, the embossed recess E is formed only on the top sheet 30, and the embossed recess E is formed on both the top sheet 30 and the intermediate sheet 40 as shown in FIG. A concave portion by embossing can be formed (not shown) so as to reach a part or substantially the entire thickness direction of the absorber 56 from the side. In order to form the recess E by embossing in both the top sheet 30 and the intermediate sheet 40, the intermediate sheet 40 has a basis weight of 8 to 40 g / m ² , a thickness of 0.2 to 1.5 mm, and a top sheet. As for 30, it is desirable that the basis weight is in the range of 15 to 80 g / m ² and the thickness is in the range of 0.2 to 3.5 mm in that embossing can be sufficiently performed under the condition that liquid permeability is not impaired.

  Moreover, you may form the recessed part by embossing only in the intermediate sheet 40, without forming a recessed part in the top sheet 30, and also emboss only in the absorption element 56, without forming a recessed part in the top sheet 30 and the intermediate sheet 40. In addition, the embossed recess may be formed only in the absorbent body 58 without forming the recess in the top sheet 30, the intermediate sheet 40, and the covering sheet 58.

  The recess E has an effect of inducing and diffusing body fluid in the direction in which the recess E extends. Therefore, when the recesses E are substantially continuous in a groove shape (including the case where a plurality of recesses are arranged at intervals and form a single groove), the body fluid reaches the absorber before reaching the absorber. It becomes diffused along the recess E, so that a wider part of the absorber can be used for absorption. Therefore, the absorbent capacity of the entire product is increased, and the absorbent article is less likely to cause side leakage or reversal due to insufficient absorbent capacity.

  On the other hand, the absorber 56 made of tow is liable to be less rigid than a conventional pulp product, but it is preferable to form a recess by embossing in the absorber 56 because the rigidity can be increased. Although not shown, in order to increase the rigidity of the absorbent element 50, it is also a preferred form to form a concave portion by embossing in the thickness direction from the back surface side (the side opposite to the top sheet 30 side) of the absorbent body 56. In order to form the recess on the back surface side, embossing is integrally performed so as to reach the absorber 56 from the back surface side of the holding sheet 80, the covering sheet 58, the body fluid impermeable sheet 70 or the exterior sheet 12. Can do. Moreover, it is preferable to form such a concave portion on the back surface side together with the concave portion E on the front surface side, but it is also possible to form only the concave portion on the back surface side without forming the concave portion E on the front surface side. When the concave portions are provided on both the front and back sides, the shape of the concave portions may be common to the front and back sides, or may be different from each other.

  The embossed recess has the effect of inducing and diffusing body fluid in the extending direction. It also has the effect of increasing rigidity. Therefore, it is desirable to determine the shape of the embossed recess in consideration of these effects. For example, the recesses are substantially continuous in the shape of a groove (including the case where a plurality of recesses are arranged in a row and form a single groove), and the plurality of recesses are arranged in a dotted pattern at intervals. It may be. In addition, as the planar pattern, groove-shaped or dot-shaped concave portions are arranged in the longitudinal direction, the width direction, a lattice shape combining these, a zigzag shape (zigzag shape) reciprocating in the width direction, or irregularly arranged. Forms can be taken. Furthermore, appropriate forms such as a pin shape, a Mt. Fuji shape, and a bellows shape can be adopted.

(Other)
In addition, although not shown in figure, each structural member of the absorptive main body 20 can be mutually fixed by solid, beads, spiral application, etc., such as a hot-melt-adhesive.

(Example of tape-type disposable diapers)
8 and 9 show examples of tape-type disposable diapers. 9 is a view taken along line 9-9 in FIG. 8, but the absorbent main body 20 is illustrated in a slightly exaggerated manner. 10 and 11 show another example.

  10 A of tape-type disposable diapers have the fastening piece 130 attached to the back side both ends of a diaper, and have the hook element 130A in the fastening surface of this fastening piece 130, and the back sheet | seat which comprises the back surface of the said diaper The diaper 12A is a nonwoven fabric laminate, and the hook element 130A of the fastening piece 130 can be engaged with an arbitrary portion of the surface of the back sheet when the diaper is mounted.

  The absorbent main body 20 has an absorbent element 50 interposed between the top sheet 30 and the body fluid impermeable sheet 70. The absorbent element 50 includes an absorbent body 56 and a covering sheet 58 that wraps the entire absorbent body 56. As shown in FIGS. 10 and 11, the absorbent body 56 can be formed with a through hole 56 </ b> H penetrating in the vertical direction (front and back direction) in a part thereof, for example, a portion facing the anus in the back side portion. A plurality of through holes 56H may be provided. Further, the cross-sectional shape of the through hole 56H may be an arbitrary shape such as a square, a rectangle, an ellipse, a pentagon, a hexagon, etc. in addition to a circular shape as illustrated.

  In the example shown in FIGS. 8 and 9, the holding sheet 80 is provided between the absorbent body 56 and the covering sheet 58, but it may be configured not to be provided as shown in FIGS. 10 and 11. .

  Further, an intermediate sheet 40 is interposed between the top sheet 30 and the absorber 56. This intermediate sheet 40 is not provided in the examples shown in FIGS. The body fluid impermeable sheet 70 has a rectangular shape wider than the absorbent body 56, and a back sheet 12A made of an hourglass-shaped non-woven fabric is provided on the outer side thereof.

  The top sheet 30 has a rectangular shape wider than the absorbent body 56, extends slightly outward from the side edge of the absorbent body 56, and is fixed to the body fluid impermeable sheet 70 with a hot melt adhesive or the like.

  Barrier cuffs 60A projecting toward the use surface are formed on both sides of the diaper. The barrier cuffs 60A are formed of a non-woven fabric that is substantially continuous in the width direction, and the barrier sheet 64 is in an expanded state. The elastic elastic member 62 is fixed. As the elastic elastic member 62, thread rubber or the like can be used. For example, a plurality of elastic members can be provided as shown in FIGS. 8 and 9, and one elastic member can be provided as shown in FIGS.

  The inner surface of the barrier sheet 64 has an adhesion start end at a position separated from the side edge of the top sheet 30, and the side portions from the adhesion start end are the side edge of the body fluid impermeable sheet 70 and the side edge of the back sheet 12 </ b> A. It is fixed by hot melt adhesive. In the fixing portion, an elastic elastic member such as rubber thread is provided between the sheet where the barrier sheet 64 and the body fluid impermeable sheet 70 face each other and between the sheet where the barrier sheet 64 and the back sheet 12A face each other. 66 are provided. 10 and 11, elastic elastic members 65 such as rubber thread are also provided between both sides of the lower surface of the absorbent element 50 and the upper surface of the body fluid impermeable sheet 70, respectively.

  The starting end of the inner surface of the barrier sheet 64 fixed to the body fluid impermeable sheet 70 forms an upstanding end of the barrier cuff 60A. Around the leg, the inside of the standing end is a free part that is not fixed to the product body, and this free part comes to stand by the contraction force of the rubber thread 62.

  The fastening piece 130 has a base portion of a fastening base material made of plastic, polylaminated nonwoven fabric, paper, or the like joined to the back sheet 12A, for example, with an adhesive, and has a hook element 130A on the tip side. The hook element 130A is bonded to the fastening substrate with an adhesive. The hook element 130A has a large number of engaging pieces on the outer surface side thereof. A temporary fixing adhesive portion 130B is provided on the tip side from the hook element 130A. At the end of the assembly of the product, the temporary fixing adhesive portion 130B is adhered to the barrier sheet 64, thereby preventing the fastening piece 130 from being peeled off at the front end side. At the time of use, it peels off against the adhesive force and brings the front end of the fastening piece 130 to the front body. The fastening base material is exposed at the tip side of the temporary fixing adhesive portion 130B, and is a tab portion.

  A target print sheet 74 as a design sheet is provided on the inner surface side of the back sheet 12A on the abdominal opening side, and a design serving as a guide for the position at which the hook element 130A of the fastening piece 130 is fastened is applied. Target printing is performed so that the target can be visually recognized through the back sheet 12A. The target print sheet 74 can be omitted.

  In this example, by using a hook-and-loop fastener as the fastening piece 130, it can be mechanically fastened to the backsheet 12A. Therefore, a so-called target tape can be omitted, and a fastening position by the fastening piece 130 can be freely selected.

  When the diaper is mounted, the diaper is mounted on the body in the shape of a boat, and the contraction force of the rubber thread 62 acts. Therefore, the barrier cuff 60A stands up around the leg by the contraction force of the rubber thread 62.

  The space surrounded by the standing part forms a confined space for urine or soft stool. When urinating into this space, the urine is absorbed into the absorbent body 56 through the top sheet 30, and the rising part of the barrier cuff 60A becomes a barrier for the solid matter of soft stool, and the overpass is prevented. The In the unlikely event that urine leaks laterally over the standing distal side edge of the standing part, side leakage is prevented by the stop function by the flat contact part.

In this embodiment, it is desirable that the barrier sheet 64 forming each standing cuff is not liquid-permeable but substantially liquid-impervious (may be semi-liquid-permeable). Further, the surface sheet (nonwoven fabric laminate) of the present invention may have a property of repelling liquid by silicon treatment or the like. In any case, it is preferable that the barrier sheet 64 and the back sheet 12A are air permeable, and the barrier sheet 64 and the back sheet 12A are sheets having a water pressure resistance of 100 mmH ₂ O or more. Thereby, it becomes air permeable in the width direction side part of a product, and a wearer's stuffiness can be prevented.

  The other points, for example, the material used for each part, etc. are the same as in the case of the above-described pants-type paper diaper, and therefore the description is omitted.

(Characteristics of the present invention)
As described above, the present invention is applied to the outermost sheet and the inner sheet fixed to the inner surface. Specifically, in the above-described example of the pants-type disposable diaper or the tape-type disposable diaper, when the exterior sheet 12 or the back sheet 12A has a two-layer structure, the outer sheet and the inner sheet of the outer sheet 12 or the inner sheet of the present invention are respectively used. Rather than the outermost sheet and the inner sheet, in the example of the tape-type disposable diaper described above, the whole body is the outermost sheet of the present invention regardless of the number of the backsheets 12A stacked, and the body fluid to which the inner surface is fixed The impermeable sheet 70 is used as an inner surface side sheet of the present invention.

  In the first embodiment of the present invention, as shown in FIG. 12, the inner surface side sheet S <b> 2 is curled up and unevenness is formed in the outermost surface sheet S <b> 1 by the wrinkles of the inner surface side sheet S <b> 2. It is a thing. A 1st form is a suitable form when outermost surface sheet S1 is a nonwoven fabric sheet which has a stretching property, and inner surface side sheet S2 is a liquid-impermeable sheet | seat which is less elastic than outermost surface sheet S1.

  In the second embodiment, as shown in FIG. 13, the outermost sheet S <b> 1 is crimped by contraction of the inner sheet S <b> 2. This form is a suitable form when the inner surface side sheet S2 is more stretchable than the outermost surface sheet S1.

  These structures of the present invention, after fixing the outermost sheet S1 and the inner sheet S2 in a state where one of the outermost sheet S1 and the inner sheet S2 is stretched more than the other sheet, It can be manufactured by opening the outer sheet S1 and the inner sheet S2 and shrinking one sheet more than the other sheet. However, this one sheet is the outermost sheet S1 in the first form, and the inner sheet S2 in the second form.

  When one sheet is stretched more than the other sheet, the stretch rate difference is preferably 0.5 to 10%, particularly preferably 1 to 6%.

  When continuously producing on the production line, although not shown, the continuous outer belt-like sheet and the inner-side sheet are pulled and transferred along the continuous direction, respectively, and the tensile force acting on each of the outermost-sheet and inner-side sheet. (So-called line draw) is adjusted individually so that either the outermost sheet or the inner sheet is stretched more than the other sheet, and the outermost sheet and the inner sheet are fixed in this state. After that, for example, when separating into individual articles in the final stage, it is possible to employ a technique in which the tension of the outermost sheet and the inner sheet is released by separating at an appropriate interval according to the product width or product length.

  As the fixing means, an adhesive B such as a hot melt adhesive is used in that the appearance change is small. The adhesive B may be applied to the inner surface of the outermost sheet S1, or may be applied to the outer surface of the inner surface side sheet S2, and may also be applied to both surfaces as necessary. When the material of the outermost sheet S1 and the material of the inner surface side sheet S2 are different, when the adhesive is more difficult to permeate, for example, when a non-woven sheet and a body fluid impermeable sheet are bonded, the body fluid is impermeable. It is preferable to apply an adhesive to the adhesive sheet.

  Adhesive B application patterns include appropriate patterns such as curtains, spirals, summits (with narrow spiral intervals), solids, slots, etc. Rather than applying, an adhesive such as a curtain (intermittent application), a spiral, a summit, and a slot that can apply the adhesive in a regular pattern with a space is preferred.

  That is, an adhesive is applied at intervals, and after fixing the outermost sheet S1 and the inner sheet S2 with this adhesive, the outermost sheet S1 and the inner sheet S2 are opened, and the outermost sheet S1 is attached to the inner sheet. When contracted from the side sheet S2, the outermost sheet S1 and the non-adhered portion of the inner surface side sheet S2 bulge outward from the bonded portion in the first form, and the outermost sheet S1 is not bonded in the second form. The portion swells away from the inner surface side sheet, and flexible unevenness is formed.

  In such intermittent bonding, the wrinkle pattern is determined by the application pattern of the adhesive. Specifically, the size of wrinkles and unevenness can be adjusted by adjusting the adhesive interval, and the number of wrinkles and unevenness can be adjusted by adjusting the number of non-adhesive portions. The shape, size, and number of wrinkles and irregularities can be determined as appropriate. However, in consideration of manufacturability, a plurality of adhesive portions are continuously provided in the front-rear direction of the article and a predetermined interval d is provided in the width direction of the article. Instead of providing rows, a plurality of rows are provided continuously in the width direction of the article and at a predetermined interval d in the front-rear width direction of the article. Although this space | interval d can be determined suitably, it is preferable to set it as 1-10 mm normally.

In particular, in the first embodiment, the inner surface side sheet S2 is configured to be visible through the outermost surface sheet S1. Specifically, the opacity (JIS P 8149) of the outermost sheet S1 is preferably 30 to 80%. Further, when the material of the outermost surface sheets S1 is a nonwoven fabric, the basis weight of the 10 to 40 g / m ² approximately, the same as in particular 15-25 g / m ^2.

  By the way, although it is a reference, in the portion having the elastic elastic member 12C of the above-described pants-type disposable diaper, a crease is formed on the exterior sheet 12 by the contraction force, and this exterior sheet 12 includes the outermost sheet S1, It is possible to provide the above-described unevenness or wrinkles in the portion having the elastic elastic member 12C, and in that case, a more pleasing appearance and feel can be obtained. On the other hand, the above-mentioned unevenness | corrugation or wrinkles can also be provided in the other part, without providing the above-mentioned unevenness | corrugation or wrinkles in the part in which a wrinkle is formed by 12 C of elastic elastic members. In this case, the portion having the elastic elastic member 12C has a cleaner appearance.

  On the other hand, the unevenness | corrugations or wrinkles of this invention are provided in the whole part which an outermost surface sheet | seat and an inner surface side sheet | seat overlap, and are not provided in a part. This is the case where the outermost sheet and the inner sheet are of the same size (for reference, the backsheet 12A has a two-layer structure, for example, as in the above-mentioned pants-type disposable diaper, Even when one of the outermost sheet and the inner sheet is small (when the sheet and the inner sheet are respectively the outermost sheet and the inner sheet) of the present invention (in the number of stacked back sheets 12A) Regardless of whether the whole is the outermost sheet of the present invention and the body fluid impermeable sheet 70 to which the inner surface is fixed is the inner sheet of the present invention).

  On the other hand, particularly in the form of engaging the hook element 130 of the fastening piece 130 with the outer surface fiber of the backsheet 12A made of the nonwoven fabric laminate, like the above-described tape-type disposable diaper, In the case of applying unevenness forming processing, it is preferable to reinforce so that the durability against peeling of the hook element at the engagement portion is relatively high. As the reinforcing means, in the present invention, a form using the above-described adhesive B for bonding between the outermost sheet and the inner sheet and a form for separately performing heat embossing are proposed.

In the following, in order, first, the form using the adhesive B is related by making at least one of the application pattern and the application amount of the adhesive B different between the engagement part and the non-engagement part of the hook element. The durability at the joint is relatively improved. The application pattern can be selected from, for example, a spiral, a summit, a slot, and the like. The application amount can be increased by, for example, applying only the engagement portion twice. From the viewpoint of manufacturability, it is preferable that the coating pattern is made common at the engaging portion and the non-engaging portion, and the coating amount is made different. As a guide for the coating amount, the engagement portion 5 g / m ² or more and less than non-engagement portions 2.5 g / m ^2.

Further, not only the application amount but also the application pattern, dimensions, and total adhesion area of the adhesive B are important. As an application pattern of the adhesive B at the engagement portion, a pattern in which a plurality of rows of adhesive lines continuous in the front-rear direction or the width direction of the article are provided at predetermined intervals, or dot-like adhesion points are provided in the form of dots. The pattern is preferable from the viewpoint of manufacturability. In this case, the total adhesion area at the engagement location is 90% or more and less than 100%, and the line width (one) of the adhesion line at the engagement location is 0.1. It is preferable that the area (one point) of the adhesion point in an engagement location is 0.05-5 mm < ² >. If the total adhesion area is too small, it will be difficult to improve durability, and if the line width or dot area at the engagement location is too narrow, it will be difficult to improve durability regardless of the total application area or application amount, and the line width or dot If the area is too wide, it becomes difficult to form irregularities and the texture tends to deteriorate. Particularly preferable ranges are 95 to 97% of the total adhesion area, 1 to 2 mm of the adhesion line width, and ² to 4 mm ² of the area of the adhesion point.

  Next, the form which performs heat embossing performs heat embossing from the outer surface side of an outermost surface sheet after uneven | corrugated etc. formation processing of this invention. For example, when the back sheet 12A has a two-layer structure, and the outer sheet and the inner sheet are the outermost sheet and the inner sheet, respectively, the absorbent main body after the lamination. Heat embossing can be performed before attaching interior parts such as. When the entire back sheet 12A is the outermost sheet of the present invention and the body fluid impermeable sheet 70 to which the inner surface is fixed is the inner sheet of the present invention, After the parts are assembled, heat embossing can be performed. Heat embossing is to impart a concavo-convex pattern to the target sheet by press-contacting the target sheet to a heated embossing roll, consolidation of fibers in the outermost sheet, fusion between fibers, and inner surface side sheet The durability can be improved by fusing. In addition, when heat embossing is performed on the engaging portion, a difference in appearance can be made with respect to the surroundings, so that it can also serve as a means for displaying the engaging portion. In this case, the target printing and the target printing sheet 74 described above can be omitted as necessary.

  Here, the engagement location of the present invention is on the opposite side of the dorsal side and the abdominal side to the side having the fastening piece 130, and as long as the hook element is engaged, its position and size can be arbitrarily determined. it can. In a normal case, the engagement location is a rectangular range having a height of 20 to 80 mm and a width of 150 to 300 mm, and the distance in the height direction between the upper end edge and the waist opening is 0 to 60 mm, particularly 20 to 50 mm, and The center in the width direction of the product is preferable.

  The present invention is suitable for a tape-type disposable diaper.

It is a perspective view of a pants-type disposable diaper. It is an expanded state top view of a pants type disposable diaper. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. It is sectional drawing of another example. It is sectional drawing of another example. It is sectional drawing of a modification. It is sectional drawing of another example. It is an expanded state top view of a tape type disposable diaper. FIG. 9 is a sectional view taken along line 9-9 in FIG. 8. It is an expanded state top view of another tape type disposable diaper. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 10. It is a principal part expanded sectional view which shows a 1st form. It is a principal part expanded sectional view which shows a 2nd form.

  DESCRIPTION OF SYMBOLS 10 ... Pants type disposable diaper, 10A ... Tape type disposable diaper, 12 ... Exterior sheet, 12A ... Back sheet, 20 ... Absorbent main body, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbing element, 52 ... Filament, 52X ... Veil, 52Y ... Tow, 52Z ... Aggregation of filaments, 54 ... Superabsorbent polymer particles, 56 ... Absorber, 58 ... Cover sheet, 60, 60A ... Barrier cuff, 64 ... Barrier sheet, 70 ... Impermeable to body fluid , 72 ... second body fluid impermeable sheet, 80 ... holding sheet, E ... heat fusion part, S1 ... outermost sheet, S2 ... inner surface side sheet.

Claims (5)

An outermost sheet made of non-woven fabric, an inner surface side sheet made of a body fluid impermeable sheet fixed to the inner surface of the outermost sheet, and an absorber provided on the inner surface side of the inner surface side sheet;
Fastening pieces having hook elements are provided at both end portions on the back side or the abdominal side, and the hook elements of the fastening pieces are attached to the outermost sheet on the opposite side of the dorsal side and the abdominal side from the side having the fastening pieces, In the tape-type disposable diaper configured to engage with the outer surface of the overlapping portion of the inner side sheet,
The outermost surface sheet and the inner surface side sheet are bonded by an adhesive at an adhesive portion provided in a plurality of rows continuously in the width direction of the diaper and spaced in the front-back width direction of the diaper, and is not bonded between the adhesive portions. Part is formed,
The outermost sheet and the inner sheet are folded together in a form in which the outermost sheet and the inner sheet both bulge outward from the bonded part in the non-bonded part over the entire overlapping part of the outermost sheet and the inner sheet. In addition, an unevenness is formed on the outermost surface sheet by the wrinkles of the inner surface side sheet, or the non-adhesive portion of the outermost surface sheet swells away from the inner surface side sheet due to contraction of the inner surface side sheet. The outermost sheet is gathered,
This is a tape-type disposable diaper.   The tape-type disposable diaper according to claim 1, wherein the adhesive portion between the outermost sheet and the inner sheet is provided with an interval of 1 to 10 mm. The engagement portion of the hook element in the outermost surface sheet is configured such that durability against peeling of the hook element is higher than that of the non-engagement portion of the hook element.
The tape-type disposable diaper according to claim 1 or 2. The application pattern of the adhesive for forming the adhesive portion is a pattern in which a plurality of rows of adhesive lines that are continuous in the diaper width direction are provided at a predetermined interval, and the width of the adhesive line at the engagement location is 0.00. 1 to 3 mm, and an area of 90% or more of the engagement portion is bonded,
By making at least one of the application pattern and the application amount of the adhesive different between the engagement part and the non-engagement part of the hook element, the durability at the engagement part of the hook element is made independent of the hook element. The tape-type disposable diaper according to claim 3, which is higher than the joint location.   The tape-type disposable diaper according to claim 3, wherein heat embossing is applied to an engagement portion of the hook element in the outermost sheet, and heat embossing is not applied to the non-engagement portion.

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