JP2006305043A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight absorbent article with firmness in the absorbent part, capable of preventing twisting, displacement and leakage. <P>SOLUTION: The paper diaper with an absorber 56 for absorbing the body fluid is formed with an aggregate of synthetic continuous fiber 52, 52, ... whose fineness is at least 5.0 deniers and which is obtained by the hydrophilic process of the absorber 56. The absorber comprises a first continuous fiber part formed of the aggregate of synthetic continuous fiber whose fineness is at least 5.0 deniers and a second continuous fiber part formed with the aggregate of continuous fiber of polysaccharides or their derivatives. The first and second continuous fiber parts are formed as layers respectively. The first continuous fiber part is formed of the aggregate of synthetic continuous fiber which is not hydrophilic-processed, and is disposed on the use side of the second continuous fiber part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an absorbent article for body fluid, and relates to a disposable absorbent article such as a disposable diaper and a sanitary napkin.

  Absorbent articles such as infant and adult tape-type and pants-type disposable diapers and sanitary napkins are used between the top sheet on the use side, the back sheet that prevents permeation of body fluids on the back side, and between these sheets. The basic element is an absorber that absorbs excreted body fluid that has permeated through the top sheet.

  For this basic element, an exterior sheet made of, for example, a non-woven fabric is provided on the back side of the back sheet, and a form for improving the touch when a plastic sheet is used as the back sheet, a form for forming so-called barrier cuffs on both sides of the product, etc. In order to improve the fit around the waist and the abdomen, a form for imparting elastic stretchability is appropriately added.

  As an absorbent body that absorbs bodily fluid that has passed through the top sheet on the use surface side, conventionally, a piled body of short pulp fibers is generally used. It is also known to use superabsorbent polymer particles (hereinafter also referred to as “SAP”) to increase the amount of absorption in body fluids.

  In addition to the case where the SAP is dispersed on the piled fiber of short pulp fibers, there are cases where the SAP of the short pulp fibers is dispersed and held (Patent Document 1).

  On the other hand, in Japanese translations of PCT publication No. 2002-524399 (WO99 / 27879: Patent document 2) and JP-T-2004-500165 (US Pat. No. 6,646,180: Patent document 3), continuous fibers are used as an absorbent. It is disclosed.

However, an absorbent body using cellulose-based continuous fibers such as cellulose acetate has low rigidity and low waist, and particularly when body fluid is absorbed, the waist suddenly weakens. This problem can be compensated for by increasing the amount of fiber used, but it is not preferable because the weight increases.
JP 2004-65300 A Special Table 2002-524399 (WO99 / 27879) 2004-500165 (US Pat. No. 6,646,180)

  Therefore, a main object of the present invention is to provide an absorbent article that is light in weight but has a strong absorption part, is less likely to cause twisting and shifting, and is difficult to leak.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In an absorbent article comprising an absorbent that absorbs body fluids,
A part or all of the absorbent body is formed by an aggregate of synthetic continuous fibers having a fineness of 5.0 denier or more subjected to a hydrophilic treatment,
An absorbent article characterized by the above.

(Function and effect)
As one solution for strengthening the waist, the present inventors considered using a synthetic continuous fiber that is stronger than the cellulosic continuous fiber. However, an absorbent body simply using synthetic fibers is significantly inferior in water absorption compared to the case of cellulosic continuous fibers. Therefore, in the present invention, by forming a continuous fiber layer using synthetic continuous fibers having a fineness of 5.0 denier or more, water absorption is achieved by hydrophilizing the fiber surface while ensuring waist strength in the absorbent portion. It is also secure. In addition, when the fineness of the synthetic continuous fiber is less than 5.0 denier, when the moisture content becomes twice or more of the own weight of the fiber, the waist becomes weak and the thickness is reduced to less than 50%.

  In addition, the fiber which carried out the hydrophilic treatment means that whose contact angle by the droplet method is less than 90 degrees by the hydrophilic treatment.

<Invention of Claim 2>
In an absorbent article comprising an absorbent that absorbs body fluids,
The absorbent body is a first continuous fiber portion formed by an assembly of synthetic continuous fibers having a fineness of 5.0 denier or more, and a second continuous fiber formed by an assembly of continuous fibers of polysaccharides or derivatives thereof. Having a part,
An absorbent article characterized by the above.

(Function and effect)
The invention described in this section proposes a solution different from the present invention characterized by the above-described hydrophilization treatment, and includes a first continuous fiber portion having a strong waist and a low waist but rich hydrophilic property. By constructing the absorbent body using the continuous fiber portion of 2, the absorbent body is strong as a whole while having a high hydrophilicity. Note that the synthetic fiber of the first continuous fiber portion may or may not be hydrophilized.

<Invention of Claim 3>
The first continuous fiber portion and the second continuous fiber portion each have a layer shape, and the first continuous fiber portion is formed of an aggregate of synthetic continuous fibers that have not been hydrophilized, and The absorbent article according to claim 2, wherein the first continuous fiber portion is disposed on the use surface side of the second continuous fiber portion.

(Function and effect)
According to this aspect, the first continuous fiber portion can quickly transfer the body fluid to the second continuous fiber portion, and the body fluid absorbed by the second fiber portion can be prevented from returning.

<Invention of Claim 4>
The first continuous fiber portion and the second continuous fiber portion are respectively layered, and the first continuous fiber portion is formed of an aggregate of synthetic continuous fibers and a superabsorbent polymer, and The absorbent article according to claim 2, wherein the second continuous fiber portion is disposed on the use surface side of the first continuous fiber portion.

(Function and effect)
In this embodiment, absorption and temporary retention of body fluid is achieved by the second continuous fiber portion on the use surface side, and final and large amount retention of body fluid is achieved by the superabsorbent polymer of the first continuous fiber portion. Will come to be. At this time, since the first continuous fiber portion is composed of a strong synthetic continuous fiber, the expansion space of the superabsorbent polymer can be secured more firmly, and a larger amount of absorption can be secured.

<Invention of Claim 5>
In an absorbent article comprising an absorbent that absorbs body fluids,
Part or all of the absorber is formed by an aggregate of continuous fibers of polysaccharides or derivatives thereof,
A body fluid diffusion layer formed of an aggregate of synthetic continuous fibers having a fineness of 5.0 denier or more is disposed on the use surface side of the absorber.
An absorbent article characterized by the above.

(Function and effect)
In this embodiment, the body fluid diffusion layer formed by an aggregate of synthetic continuous fibers having a fineness of 5.0 denier or more is disposed not on the use surface side but on the use surface side, so that the absorbent body has a wider range. While diffusing body fluid, it is possible to strengthen the waist at the absorption site.

<Invention of Claim 6>
The absorbent article according to any one of claims 1 to 5, wherein the synthetic continuous fiber is a crimped fiber.

(Function and effect)
When the fiber is crimped, not only the bulk but also the waist becomes stronger. Therefore, it is preferable to use a crimped fiber as the synthetic continuous fiber of the present invention.

<Invention of Claim 7>
The absorbent article according to any one of claims 1 to 6, wherein the synthetic continuous fiber is a modified cross-section fiber.

(Function and effect)
The modified cross-section fibers such as H-shape and Y-shape have a small weight for rigidity. Therefore, in order to further improve the weight reduction by using the synthetic continuous fiber, it is preferable to use a modified cross-section fiber as the synthetic continuous fiber of the present invention.

<Invention of Claim 8>
The absorption according to any one of claims 1 to 7, wherein the synthetic continuous fiber is a thermoplastic fiber, and a concave portion is formed by a heat compression process in a portion formed by the aggregate of the synthetic continuous fibers. Sex goods.

(Function and effect)
As described in this section, it is preferable to use a thermoplastic fiber as the synthetic fiber because a recess serving as a storage space for excrement such as feces can be easily formed by heat compression.

  As described above, according to the present invention, there is an advantage that the absorption portion becomes strong while being lightweight, and it is less likely to cause twisting and shifting and is difficult to leak.

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 composed of two sheets of water-repellent nonwoven fabric, for example, and an elastic elastic member is interposed between these sheets, and a form that fits the wearer by the contraction force is desirable. 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 shown in FIG. 3, the absorbent main body 20 according to the embodiment includes, in order from the use surface side, a top sheet 30 made of, for example, a nonwoven fabric that allows body fluid to permeate, an intermediate sheet (second sheet) 40, and an absorbent element 50. It has. A body fluid impermeable sheet (also referred to as a back sheet) 70 made of a plastic sheet or the like is provided on the back side of the absorbent element 50. The exterior sheet 12 is provided on the back side of the body fluid impermeable sheet 70. Further, barrier cuffs 60, 60 are provided on both sides.

(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. Examples include synthetic fibers such as polyethylene and polypropylene such as olefins, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers in which two or more of these are used. can do. 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, and a needle punch method. For example, the spun lace method is a preferable processing method when the flexibility and drape properties are required, and the thermal bond method is the preferable processing method when the bulkiness and softness are required.

  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. This intermediate sheet 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. State.

  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 (second sheet) 40 is interposed between the top sheet 30 and the covering sheet 58. As shown in FIG. 4, a form in which the intermediate sheet (second sheet) 40 is not provided can also be used.

  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 of the microporous sheet obtained in this way can be given.

  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.

(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 form, a holding sheet 80 is provided between the absorber 56 and the back surface side portion (lower part) of the covering sheet 58. This holding sheet 80 is as shown in the example shown in FIG. Can be omitted.

(First form of absorber)
FIG. 3 employs the absorbent body 56 of the first embodiment, and the absorbent body 56 is composed of an aggregate of synthetic continuous fibers 52, 52... Is formed.

  As the synthetic continuous fiber 52, for example, polyethylene, polypropylene, polyamide, polyester, polylactamamide, polyvinyl acetate, polyethylene terephthalate, and the like can be used, and a liquid containing a hydrophilic agent is applied to the surface of these fibers. Hydrophilic treatment can be performed. The degree of hydrophilicity is preferably such that the contact angle by the droplet method is 55 ° or less, particularly 40 ° or less (other hydrophilic treatments and hydrophilic properties are also the same). The fineness of the synthetic continuous fiber 52 is at least 5 denier, preferably 7 to 20 denier, from the viewpoint of ensuring waist strength. If the fineness of the synthetic continuous fiber 52 is too thin, the effect of improving the waist is insufficient, and if it is too thick, the waist becomes too strong, and the lack of flexibility leads to a deterioration in wearing feeling and fit.

  Thus, by using a synthetic continuous fiber that has been hydrophilized, it is possible to strengthen the waist while suppressing a decrease in water absorption performance.

  The synthetic continuous fiber 52 may contain various additives such as a heat stabilizer, a colorant, an oil agent, a yield improver, a whiteness improver, and the like.

  The synthetic continuous fiber 52 may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fibers can be, for example, 1 to 50 per inch, preferably about 2 to 30. Further, it is preferable to use crimped fibers that are uniformly crimped. When crimped fibers are used, the bulky and light absorbent body 56 can be manufactured, and the highly integrated absorbent body 56 can be easily manufactured by entanglement between the fibers.

  Although the cross-sectional shape of the synthetic continuous fiber 52 is not particularly limited, for example, a circle, an ellipse, an irregular shape (for example, an H shape, a Y shape, an X shape, an I shape, an R shape, etc.), a hollow shape, or the like It is also preferable that the fiber has a modified cross section.

  The synthetic continuous fiber 52 is, for example, a tow (a bundle of continuous fibers) formed by bundling about 3,000 to 1,000,000, preferably about 5,000 to 1,000,000 single fibers. The aggregate of the synthetic continuous fibers 52, 52... Can be obtained by peeling the tow from the bale and opening it 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 100 to 2000 mm, preferably about 100 to 300 mm of the width of the product absorber. Moreover, the density of an absorber can be adjusted by adjusting the degree of tow opening. Tow opening methods include, for example, a method in which the tow is spread over a plurality of opening rolls and the tow width is gradually expanded as the tow progresses, and the tow tension (extension) and relaxation (contraction) And the like, and a method of widening and opening using compressed air can be used.

  For the purpose of strengthening the entanglement between the fibers in the aggregate of the synthetic continuous fibers 52, 52..., A binder that adheres or fuses the contact portions of the fibers or has such an action can be used. As the binder, in addition to ester plasticizers such as triacetin, resin adhesives such as thermoplastic resins can be used.

  Preferably, as shown in FIG. 3, superabsorbent polymer particles 54, 54. It is desirable that at least in the body fluid receiving region, the superabsorbent polymer particles (SAP particles) are dispersed substantially throughout the thickness direction with respect to the aggregate of continuous fibers 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 throughout the thickness direction” means “distributed unevenly in the upper, lower, and / or middle portions of the continuous fiber aggregate in addition to the form“ uniformly ”distributed throughout the 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 remain on the surface of the continuous fibers 52, 52... Without entering the aggregate, and some SAP particles pass through the aggregate of continuous fibers 52, 52. The form on the covering sheet 58 and the form on the holding sheet 80 as will be described later are not excluded.

(Second form of absorber)
In the present invention, as shown in FIGS. 5 to 7, from the first continuous fiber portion 56 </ b> A composed of an aggregate of synthetic continuous fibers having a fineness of 5.0 denier or more and the aggregate of continuous fibers of polysaccharides or derivatives thereof. An absorbent body 56 having a second continuous fiber portion 56B is also proposed. In this embodiment, the waist strength is secured by the first continuous fiber portion 56A, and the decrease in hydrophilicity due to the influence is compensated by the second continuous fiber portion 56B.

  Although the arrangement of the first and second continuous fiber portions 56A and 56B in the absorbent body 56 is arbitrary, it is layered as shown in FIG. 5, that is, the first continuous fiber layer 56A and the second continuous fiber layer 56B. Is a preferred form.

  Specifically, as shown in FIG. 5, the second continuous fiber layer 56B rich in hydrophilicity is used as the upper layer (arranged on the use surface side), and the first continuous fiber layer 56A made of synthetic continuous fibers is used as the lower layer ( The superabsorbent polymer particles 54 can be included in the upper layer 56B. In this case, the upper layer 56B exhibits the main absorption performance of the absorber 56, and the lower layer 56A plays a role of strengthening the waist of the absorber 56. The synthetic fiber used for the first continuous fiber portion 56A is preferably subjected to a hydrophilic treatment, but may not be subjected to a hydrophilic treatment.

  On the other hand, as shown in FIG. 6, the first continuous fiber layer 56A made of synthetic continuous fibers is used as the upper layer (arranged on the use surface side), and the second continuous fiber layer 56B rich in hydrophilicity is used as the lower layer (back surface side). ) And the superabsorbent polymer particles 54 can be included in the lower layer. In this case, by using synthetic fibers that have not been hydrophilized in the upper layer 56A, the upper layer 56A can function in the same manner as the above-described intermediate sheet, and not only the waist is strengthened, but also diffusion of body fluids and prevention of reversal are achieved. be able to. In the illustrated embodiment, the intermediate sheet 40 is provided, but may be omitted.

  Further, as shown in FIG. 7, the second continuous fiber layer 56B rich in hydrophilicity is used as the upper layer (arranged on the use surface side), and the first continuous fiber layer 56A made of synthetic continuous fibers is used as the lower layer (back side). The superabsorbent polymer particles 54 can be included in the lower layer 56A. In this case, the upper layer 56B achieves absorption and temporary retention of bodily fluids, and the superabsorbent polymer 54 of the lower layer 56A achieves final and large volume retention of bodily fluids. Under the present circumstances, since lower layer 56A consists of a strong synthetic continuous fiber, the expansion space of superabsorbent polymer 54 can be ensured more firmly, and more absorption can be ensured. In this form, the synthetic fiber used for the lower layer 56A is preferably subjected to a hydrophilic treatment, but may not be subjected to a hydrophilic treatment. It should be noted that it is possible to appropriately determine which of these forms is adopted according to the type, characteristics, etc. of the product.

  As the continuous fiber of polysaccharide or derivative thereof used for the second continuous fiber layer 56B, for example, polysaccharide or derivative thereof (cellulose, cellulose ester, chitin, chitosan, etc.), particularly cellulose ester 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 fineness of the continuous fiber of the polysaccharide or its derivative is preferably 1.0 to 20 denier, particularly 2.0 to 10 denier. If the fineness is too thin, the effect of improving the waist is insufficient, and it is difficult to sufficiently unravel the fibers. When the superabsorbent polymer particles are contained, it is difficult to uniformly disperse the particles. Moreover, when this fineness becomes too thick, the waist becomes too strong, and lack of flexibility leads to deterioration of wearing feeling and fit.

  In addition, the use of additives, the presence or absence of crimp, the degree of crimp, the cross-sectional shape of the fiber, the adhesion or fusion of fibers using a binder, the opening of the tow, etc. are the same as those of the aforementioned synthetic continuous fiber. Therefore, explanation is omitted dare.

(Third form of absorber)
As another form, as shown in FIG. 8, as the absorbent body 56, as a member on the use surface side of the absorbent body 56, an aggregate of continuous fibers of polysaccharides or derivatives thereof with high hydrophilicity is adopted ( Specifically, in place of the intermediate sheet 40 described above, it is also proposed to provide a body fluid diffusion layer 53 made of an aggregate of synthetic continuous fibers having a strong fineness of 5.0 denier or more. In this case, in the aggregate of continuous fibers, the body fluid easily diffuses along the fiber continuation direction, so the body fluid diffuses so that the fibers continue along the desired direction, for example, the product front-rear direction (longitudinal direction) or the width direction. Layer 53 is provided. The thickness of the body fluid diffusion layer 53 can be 0.05 to 3 mm. When the thickness is less than 0.05 mm, a part where there are few or no fibers is mixed in some places, and the body fluid diffusion effect is poor. On the other hand, when the thickness exceeds 3 mm, not only the cost increases, but also a feeling of wearing is brought about, and the fitting property is lowered.

(Superabsorbent polymer particles)
In the form using the superabsorbent polymer 54, the superabsorbent polymer particle 54 includes “powder” in addition to “particle”. As the particle diameter of the superabsorbent polymer particles 54, those used in this type of absorbent article can be used as they are, and those having a particle size of 100 to 1000 μm, 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 60 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 3 to 9.

(Absorber size / weight)
On the other hand, the size of the absorber 56 is preferably such that the planar projection area is 400 cm ² or more and the thickness is 1 to 10 mm, particularly 1 to 5 mm. When the size of the absorbent body 56 is within this range, it is extremely advantageous in improving the resilience without increasing the weight, thickness, and cost. The weight of the absorber 56 is preferably 25 g or less, particularly 10 to 20 g. When the weight of the absorber 56 is within this range, the advantage of not using a dedicated member becomes particularly significant.

(Compressive properties of absorber)
The compression resilience RC of the absorbent body 56 is preferably 40 to 60%, particularly 50 to 60%. Thereby, sufficient restoring property can be exhibited with the absorber itself.

Furthermore, it is preferable that the compression energy WC of the absorbent body 56 is 4.0 to 10.0 gf · cm / cm ² , since it can be compressed compactly to the same level as before or during packaging.

  These compression characteristics can be adjusted by adjusting the fiber density of the aggregate of continuous fibers by opening or the like, selecting the fiber material, selecting the type of binder such as a plasticizer, adjusting the degree of processing, or a combination thereof. .

  Here, the compression energy (WC) is an energy consumption amount when pressing the center part of the test piece cut to a length of 200 mm and a width of 50 mm up to 50 g.

This compression energy can be measured by a handy compression tester (KES-G5, manufactured by Kato Tech). The measurement conditions for this tester are: SENS: 2, force meter type: 1 kg, SPEED RANGE: STD, DEF sensitivity: 20, pressurization area: 2 cm ² , capture interval: 0.1 (standard), STROKE SET: 5.0, upper limit load: 50 gf / cm ² .

  On the other hand, the compression resilience (RC) is a parameter representing the recoverability when the fiber is compressed. Therefore, if the recoverability is good, the compression resilience increases. This compression resilience can be measured with a handy compression tester (KES-G5, manufactured by Kato Tech). The measurement conditions for this tester are the same as for the compression energy.

(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 8 to ²⁰ g / m ² , particularly 10 to 15 g / m ² .

  As shown in FIG. 3, the covering sheet 58 has a form of wrapping the aggregate of continuous fibers 52, 52... And the entire layer of superabsorbent polymer particles 54, 54. It may cover only the back and side surfaces of the layer. 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 irregularities of the superabsorbent polymer particles that have passed through the aggregate of continuous fibers give a sense of incongruity when touched by the hand when used by consumers. 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.

  In FIG. 10, when the superabsorbent polymer particles 54 are provided below the absorber 56, or when the superabsorbent polymer particles 54 contained in the absorber 56 are used from the manufacture to the consumer. In the stage, the case where the continuous fiber 52 is pulled out and gathered on the holding sheet 80 is conceptually shown.

  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.

  Even if the holding sheet 80 is provided only below the absorbent body 56 as shown in FIG. 3 and the like, the holding sheet 80 passes through the side surface of the absorbent body 56 and extends up to the upper surface of the absorbent body 56 as shown in FIG. May be. 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 absorbent body 56 made of continuous fibers is likely to be less rigid than the conventional pulp material, but it is preferable to form a recess by embossing in the absorbent body 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 recess on the back side together with the recess E on the front side, but it is also possible to form only the recess on the back side without forming the recess E on the front 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.

  On the other hand, when thermoplastic fibers are used as the synthetic continuous fibers of the absorbent body 56 and the body fluid diffusion layer 53, various recesses can be formed by subjecting them to heat compression processing such as heat embossing. Specifically, pattern-like embossing for improving rigidity is applied to the absorbent body 56 or a part 56A thereof using synthetic continuous fibers, or heat embossing is applied to a part of the absorbent body 56 as shown in FIG. By applying this, it is possible to form a depression 56U that accommodates stool, or to form a similar stool accommodation depression 53U in the body fluid diffusion layer 53 as shown in FIG.

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

(Example of tape-type disposable diapers)
14 and 15 show examples of tape-type disposable diapers. FIG. 15 is a view taken along the line IX-IX in FIG. 14, but the absorbent main body 20 is slightly exaggerated.

  The tape-type disposable diaper 10A has fastening pieces attached to both ends of the back side of the diaper, has a hook element on a fastening surface of the fastening piece, and a back sheet constituting the back side of the diaper is laminated with a nonwoven fabric. The diaper is configured to be able to engage with a hook element of the fastening piece at an arbitrary position on the surface of the back sheet when the diaper is used as a body.

  The absorbent main body 20 has an absorbent body 56 interposed between the top sheet 30 and the body fluid impermeable sheet 70. The absorbent body 56 is entirely wrapped by a covering sheet 58 made of tissue paper, and has a rectangular shape in plan view. A holding sheet 80 is provided between the absorber 56 and the covering sheet 58.

  Further, an intermediate sheet 40 is interposed between the top sheet 30 and the absorber 56. 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 to the use surface side are formed on both sides of the diaper. The barrier cuffs 60A are formed of a barrier sheet 64 made of a nonwoven fabric substantially continuous in the width direction, and an elastic elastic member such as a thread rubber. And one or a plurality of leg rubber elastic members 62 as elastic elastic members for the leg periphery. 130 is a fastening piece by a hook-and-loop fastener.

  The inner surface of the barrier sheet 64 has a fixing start edge at a position separated from the side edge of the top sheet 30, and the outer portion in the width direction extends from the fixing start edge to the extending edge of the body fluid impermeable sheet 70. It is fixed by. The outer surface of the barrier sheet 64 is fixed to the back sheet 12A with a hot melt adhesive or the like on the lower surface thereof. Further, an elastic expansion / contraction member for gasket cuff, for example, thread rubber 66 is provided.

  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.

  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.

  The fastening piece 130 has a base portion of a fastening base material such as plastic, polylaminated nonwoven fabric, or paper, joined to the back sheet 12A by an adhesive, for example, 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 bonded to the barrier sheet 64 to prevent peeling of the fastening piece 130 on 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 from the temporary fixing adhesive portion 130B, and is a tab portion.

  A target printing sheet 74 as a design sheet is provided on the inner surface side of the back sheet 12A on the opening side of the front body, and a design that serves 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.

  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, so the description will be omitted.

  The present invention is suitable for manufacturing absorbent bodies in absorbent articles such as paper diapers, sanitary napkins, incontinence pads, and absorbent pads used in combination with diaper covers.

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 cross-sectional view taken along line 3-3 in FIG. 2. It is sectional drawing equivalent to the 3-3 line of another example. It is sectional drawing equivalent to the 3-3 line of another example. It is sectional drawing equivalent to the 3-3 line of a modification. It is sectional drawing equivalent to the 3-3 line of another example. It is sectional drawing equivalent to the 3-3 line of another example. It is sectional drawing equivalent to the 3-3 line of another example. It is sectional drawing equivalent to the 3-3 line of another example. It is sectional drawing equivalent to the 3-3 line of another example. It is sectional drawing equivalent to the 3-3 line of another example. It is sectional drawing equivalent to the 3-3 line of another example. It is an expanded state top view of a tape type disposable diaper. It is IX-IX sectional drawing of FIG.

Explanation of symbols

  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 ... Continuous fiber, 53 ... Body fluid diffusion layer, 52X ... Veil, 52Y ... Tow, 52Z ... Assembly of continuous fibers, 54 ... Superabsorbent polymer particles, 56 ... Absorber, 56A ... First continuous fiber layer, 56B ... Second continuous Fibrous layer, 58 ... covering sheet, 60, 60A ... barrier cuff, 64 ... barrier sheet, 70 ... body fluid impermeable sheet, 72 ... second body fluid impermeable sheet, 80 ... holding sheet.

Claims (8)

In an absorbent article comprising an absorbent that absorbs body fluids,
A part or all of the absorbent body is formed by an aggregate of synthetic continuous fibers having a fineness of 5.0 denier or more subjected to a hydrophilic treatment,
An absorbent article characterized by the above. In an absorbent article comprising an absorbent that absorbs body fluids,
The absorbent body is a first continuous fiber portion formed by an assembly of synthetic continuous fibers having a fineness of 5.0 denier or more, and a second continuous fiber formed by an assembly of continuous fibers of polysaccharides or derivatives thereof. Having a part,
An absorbent article characterized by the above.   The first continuous fiber portion and the second continuous fiber portion each have a layer shape, and the first continuous fiber portion is formed of an aggregate of synthetic continuous fibers that have not been hydrophilized, and The absorbent article of Claim 2 by which the said 1st continuous fiber part is arrange | positioned by the use surface side of the said 2nd continuous fiber part.   The first continuous fiber portion and the second continuous fiber portion are respectively layered, and the first continuous fiber portion is formed of an aggregate of synthetic continuous fibers and a superabsorbent polymer, and The absorbent article according to claim 2, wherein the second continuous fiber portion is disposed on the use surface side of the first continuous fiber portion. In an absorbent article comprising an absorbent that absorbs body fluids,
Part or all of the absorber is formed by an aggregate of continuous fibers of polysaccharides or derivatives thereof,
A body fluid diffusion layer formed of an aggregate of synthetic continuous fibers having a fineness of 5.0 denier or more is disposed on the use surface side of the absorber.
An absorbent article characterized by the above.   The absorbent article according to any one of claims 1 to 5, wherein the synthetic continuous fiber is a crimped fiber.   The absorbent article according to any one of claims 1 to 6, wherein the synthetic continuous fiber is a modified cross-section fiber.   The absorption according to any one of claims 1 to 7, wherein the synthetic continuous fiber is a thermoplastic fiber, and a concave portion is formed by a heat compression process in a portion formed by the aggregate of the synthetic continuous fibers. Sex goods.

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