JP6450102B2 - Pants-type absorbent article - Google Patents

Description

  The present invention relates to a pants-type absorbent article.

  An underpants-type absorbent article comprising a top sheet, a back sheet, an interior body including an absorbent body between the top sheet and the back sheet, and an exterior body positioned on the non-skin contact surface side of the interior body Are known. This pants-type absorbent article is often provided with a gather so that it can easily fit around the user's stomach and legs. For example, as shown in FIG. 5, the gather can bond the elastic rubber thread rubber between the nonwoven fabrics constituting the pant-type absorbent article in the stretched state, and a member in which the rubber thread is bonded between the nonwoven fabrics. Can be formed and adhered to the pant-type absorbent article. Thereby, the expansion and contraction performance of the pant-type absorbent article is improved, the feeling of fitting at the time of wearing is enhanced, and further, body fluid such as urine and blood is prevented from leaking to the outside.

  The presence of these gathers characterizes the appearance of a pants-type absorbent article such as a disposable diaper. That is, the rubber thread that can be seen through the gathered part, especially the part around the stomach and the part around the buttock, and the large number of large wrinkles that form around it are very different from the appearance of normal underwear. ing. Such a difference in appearance is not desirable for users who do not want third parties to know the use of pant-type absorbent articles, and the appearance of pants-type absorbent articles that are closer to underwear is expected.

  In order to improve such appearance problems, a paper diaper has been proposed that uses an elastic film in place of the thread rubber in a so-called fit gather region formed in a region around the stomach. For example, Patent Document 1 discloses a breathable elastic film containing a polymer selected from the group consisting of polyurethane, polyether amide, polyester elastomer, and combinations thereof, and stretchable in two orthogonal directions bonded to the film. A technique for forming an absorbent article using a biaxial elastic stretchable breathable laminate comprising a nonwoven spunbond nonwoven web surface material is disclosed.

  If the technique disclosed in Patent Document 1 described above is used, a pants-type absorbent article having an appearance closer to underwear can be provided, so that the above-described problems can be solved. However, a mixture of a water absorbent resin and fluff pulp is used for the absorbent body of the absorbent article. This mixture spreads and retains urine by embedding a water-absorbent resin in a pulp mat or by embedding it in a specific part. In order to obtain a predetermined absorption performance, a certain amount of water-absorbent resin is used. And the amount of pulp is needed.

  However, when there is much pulp with respect to a water-absorbent resin, the thickness of a product also becomes thick, a fit feeling is impaired for a wearer, there is a sense of incongruity, or inconveniences such as conspicuous wearing over clothes occur.

JP 2008-279774 A

  The object of the present invention has been made in view of such problems, has an appearance closer to that of underwear, is easy to wear off, is easy to take off, has a good fit and feel when worn, and is worn. An object of the present invention is to provide a pant-type absorbent article that is not easily stuffy and has excellent breathability.

(1) A pant-type absorbent article according to the present invention includes an exterior body formed in a pant form, and an interior body that is positioned on the skin contact surface side of the exterior body and absorbs body fluid. A body is provided with a ventral portion, a dorsal portion, a crotch portion provided so as to connect between the ventral portion and the dorsal portion, a top sheet in which the inner body comes into contact with the skin, and the exterior A back sheet that comes into contact with the body, and an absorbent body that is provided between the top sheet and the back sheet, and the abdomen and the dorsal side are the first nonwoven fabric and the stretchable material. It is formed from a composite sheet formed by integrating and laminating a film and a second nonwoven fabric in this order from the skin contact surface side, and the absorber is composed of an upper hydrophilic nonwoven fabric and a first hydrophilic material in order from the top sheet side. A primary water-absorbing layer containing a water-absorbing resin and an adhesive, an intermediate hydrophilic nonwoven fabric, and a second water-absorbing layer. A secondary water-absorbing layer containing a sex resin and adhesive, characterized by having a a lower hydrophilic non-woven.

(2) The pant-type absorbent article of the present invention is the pant-type absorbent article according to (1), further comprising a liquid diffusible sheet between the top sheet and the absorber, and the liquid diffusion The hydrophilic sheet may be a hydrophilic nonwoven fabric having a thickness of 0.1 mm or more and a basis weight of 20 g / m ² or more.

(3) The pant-type absorbent article of the present invention is the pant-type absorbent article according to (1), and may further include a hydrophilic nonwoven fabric between the back sheet and the absorbent body.

(4) The pant-type absorbent article of the present invention is the pant-type absorbent article according to (1), further including a pair of three-dimensional gathers on both sides in the longitudinal direction of the crotch part of the interior body. Good.

(5) The pant-type absorbent article of the present invention is the pant-type absorbent article according to (1), wherein the interior body and the exterior body have a thickness difference of 2.5 mm or less. Good.

(6) The pant-type absorbent article of the present invention is the pant-type absorbent article according to (1), wherein the interior body may be fixed to the exterior body at the crotch part of the exterior body.

  The object of the present invention has been made in view of such problems, has an appearance closer to that of underwear, is easy to wear, is easy to take off, has a good fit and feel when worn, and stuffy when worn. An object of the present invention is to provide a pant-type absorbent article that is difficult and has excellent breathability.

It is the schematic which shows the underpants type absorbent article which concerns on embodiment of this invention. It is sectional drawing in the X-X 'line | wire of FIG. It is an expanded view of the underpants type absorbent article which concerns on embodiment of this invention. FIG. 4 is a cross-sectional view taken along line Y-Y ′ of FIG. 3. It is the schematic which shows the conventional pants type absorbent article.

  With reference to FIG. 1 thru | or FIG. 4, the underpants type absorbent article which concerns on embodiment of this invention, and its manufacturing method are demonstrated in detail. In the description of the embodiments, the same numbers are assigned to the same elements throughout. In the description of the present specification, the longitudinal direction of the pant-type absorbent article 1 is a direction extending before and after the wearer when the pant-type absorbent article 1 is worn, and the short direction of the pant-type absorbent article 1 is Means a direction transverse or orthogonal to the longitudinal direction. Further, in the description of the present specification, the body fluid refers to a liquid discharged from the body such as urine, blood, and water in loose stool. Furthermore, when the pants-type absorbent article 1 is worn, it means at least one of when the pants-type absorbent article 1 is worn and after. Moreover, although the paper diaper is demonstrated as an example as the pants-type absorbent article 1, other pants-type absorbent articles such as disposable shorts and incontinence disposable diapers may be used.

  1 is a schematic view showing a pant-type absorbent article according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line XX ′, and FIG. 3 is a pant according to an embodiment of the present invention. FIG. 4 is a development view of the mold absorbent article, and FIG. 4 is a cross-sectional view taken along line YY ′ of FIG. 3. One embodiment of the pant-type absorbent article 1 in the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 4, the pant-type absorbent article 1 includes an abdominal side part 11, a back side part 12, and a crotch part 13 provided between the abdominal side part 11 and the back side part 12. The exterior body 10 which has the exterior body 10 which has, the top sheet 21, the back sheet 22, and the absorber 23 provided between the top sheet 21 and the back sheet 22, and is located in the skin contact surface side of the exterior body 10 20.

(Exterior body)
The pants-type absorbent article 1 is located on the non-skin contact surface side of the interior body 20, and is located on the stomach side (A side in FIG. 3) of the wearer, and on the back side (B side in FIG. 3). ) And the exterior body 10 formed in the form of the pants divided into the crotch part 13 provided so as to connect the back side part 12 located between them.

  In the exterior body 10, the trunk periphery 19 is formed by joining the side edge 31 of the ventral side 11 and the side edge 32 of the back side 12, and the upper edge 16 of the trunk periphery 19 is folded outward. An elastic expansion / contraction member 17 is provided. As shown in FIG. 1 or FIG. 2, the waist portion 19 is integrally formed even if the ventral side portion 11 and the side edge portions (31, 32) of the back side portion 12 are joined and molded. It may be.

  The abdominal side portion 11 and the back side portion 12 are formed by laminating the first nonwoven fabric 14, the stretchable film 15, and the second nonwoven fabric 14 by heat fusion or ultrasonic bonding in this order from the skin contact surface side. It is formed from a composed composite sheet. The crotch part 13 may be composed of a composite sheet similar to the ventral part 11 and the dorsal part 12, and uses the same material as the nonwoven fabric 14 described above, and uses the same processing method. You can also

  The stretchable film 15 is not particularly limited as long as it has stretchability, and examples thereof include films formed from polyester elastomers, polyolefin elastomers, polyurethane resins, polyamide resins, and the like. Among these, a polyurethane resin film is preferable from the viewpoint of cost and stretchability.

The composite sheet has an air permeability measured in accordance with JIS L 1096-A (Fragile method): 1990 of 20 cm ³ / cm ² · sec or more in a non-stretched state. If the air permeability is less than 20 cm ³ / cm ² · sec, it becomes easy to get stuffy when worn. The air permeability can be freely changed according to the thickness, density, weight per unit area of the nonwoven fabric fibers constituting the composite sheet, the opening area ratio of the opening provided in the stretchable sheet, and the like.

Further, the composite sheet has an air permeability measured based on JIS L 1096-A (Fragile method): 1990 of 50 cm ³ / cm ² · sec or more when stretched 150% in the stretching direction. Here, 150% stretched in the stretch direction is the ratio of the length in the stretched state to the natural length in the non-stretched state. That is, when a composite sheet having a natural length of 10 cm in a non-stretched state is stretched by 15 cm in the stretching direction, it is stretched by 15/10 × 100 = 150%. When the air permeability is less than 50 cm ³ / cm ² · sec, the portion used in the stretched state, for example, the portion around the buttocks is easily stuffy when worn.

  The pant-type absorbent article 1 can be provided with a pair of left and right leg gathers 18 from the abdominal side portion 11 through the crotch portion 13 to the back side portion 12. The leg gathers 18 are formed by an elastic member 18a, for example, a sheet 18b made of thread rubber and nonwoven fabric. By providing the leg gather 18, not only the expansion / contraction direction (left / right direction when worn) but also the direction intersecting with the expansion / contraction direction (vertical direction when worn) can be expanded / contracted, and the fit around the inseam is improved. improves.

(Interior body)
The interior body 20 of the present embodiment is located on the skin contact surface side of the exterior body 10 and has a liquid-permeable top sheet 21 that contacts the skin, and a liquid-impermeable back sheet 22 that contacts the exterior body 10. In addition, an absorbent body 23 provided in a stacked manner between the top sheet 21 and the back sheet 22 and an interior body 20 that absorbs body fluids including the three-dimensional gathers 24 are provided. The interior body 20 is fixed to the exterior body 10 at the crotch portion 13 of the exterior body 10. Thereby, the absorber 23 has a structure sandwiched between the top sheet 21 and the back sheet 22. The interior body 20 is disposed from the abdomen side portion 11 to the inside of the back side portion 12 of the exterior body 10, and is fixed to the exterior body 10 at the crotch portion 13 of the exterior body 10. As the fixing method, for example, the outer body 10 is bonded by an adhesive such as hot melt, heat fusion, ultrasonic bonding, or the like.

The base material of the top sheet 21 of the present embodiment only needs to have liquid permeability so that the body fluid moves to the absorber 23. For example, a nonwoven fabric such as a thermal bond nonwoven fabric or a thermal bond / spun bond is laminated. It is formed from a material such as a composite nonwoven fabric, an open film such as an open polyethylene film, a foam film such as polyethylene foam or urethane foam, or a composite sheet obtained by laminating these films. The top sheet 21 is preferably embossed or perforated on the surface in order to improve liquid permeability. The processing method can perform a well-known method without a restriction | limiting. In order to reduce irritation to the skin, the top sheet 21 preferably contains a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizing agent and the like. Furthermore, the strength and processability of the point, the basis weight of the top sheet 21 is preferably 14 g / ^{m 2} or more 40 g / ^{m 2} or less. Although there is no restriction | limiting in particular as a shape of the top sheet 21, In order to guide liquids, such as urine, to the absorber 23, what is necessary is just the shape which covers the absorber 23. FIG.

  A three-dimensional gather 24 is provided on the skin contact surface side of the top sheet 21 to prevent leakage of a pair of body fluids from both longitudinal portions of the crotch 13, that is, from the longitudinal front portion A to the longitudinal rear portion B. It is preferable. The outer portion in the width direction of the three-dimensional gather 24 is fixed to the back sheet 22, and the inner portion in the width direction is not fixed to the top sheet 21, and the three-dimensional gather elastic member 24 a such as thread rubber and the nonwoven fabric along the longitudinal direction. By being formed of the sheet 24b, etc., it has an upright property and can be deformed so as to expand and contract in accordance with the body shape of the user.

  The base material of the back sheet 22 of the present embodiment may be any material as long as it has liquid impermeability so that the body fluid retained by the absorber 23 does not leak, and may be a nonwoven fabric, a resin film, or a composite in which these are laminated. It is formed from a material such as a sheet. The production method of the nonwoven fabric is not particularly limited, and for example, a spunbond or meltblown nonwoven fabric, or a composite nonwoven fabric obtained by laminating spunbond / meltblown, spunbond / meltblown / spunbond, and a composite material thereof can be considered. Examples of the resin film include polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene. Moreover, in order to prevent the stuffiness at the time of mounting | wearing, it is preferable that the back seat | sheet 22 has moisture permeability. In order to provide moisture permeability, for example, a filler is added to the resin film of the base material, and the back sheet 22 is embossed for perforation.

  The absorbent body 23 is composed of an upper hydrophilic nonwoven fabric 41, a primary water absorbent layer 42, an intermediate hydrophilic nonwoven fabric 43, a secondary water absorbent layer 44, and a lower hydrophilic nonwoven fabric 45 in this order from the top sheet 21 side. .

  The primary water-absorbing layer 42 and the secondary water-absorbing layer 44 contain a water-absorbing resin and an adhesive, and the upper hydrophilic nonwoven fabric 41, the primary water-absorbing layer 42, the intermediate hydrophilic nonwoven fabric 43, and the secondary water-absorbing layer by the adhesive. 44 and the lower hydrophilic nonwoven fabric 45 are adhered to each other.

  As an index of the absorption rate of the water absorbent resin, there is an absorption rate of physiological saline by the Vortex method. This was done by adding 50 ml of physiological saline to a 100 ml beaker containing a rotor, stirring at 600 rpm using a magnetic stirrer, precisely weighing 2.000 g of the water-absorbing resin, and throwing it into the vortex. Time measurement is started with a stopwatch and the time until the rotor of the magnetic stirrer stops is measured. The smaller the value, the faster the absorption rate.

  The absorption rate of the physiological saline by the Vortex method of the first water-absorbing resin used in the primary water-absorbing layer 42 increases the absorption rate of the liquid in the absorber 23 and avoids the retention of the liquid in the primary water-absorbing layer. Is preferably 30 to 70 seconds, more preferably 35 to 60 seconds, and still more preferably 35 to 55 seconds.

  The water-absorbent resin contained in the secondary water absorption layer 44 has a role of quickly absorbing and holding the liquid that could not be absorbed by the primary water absorption layer. For that purpose, it is preferable to use a water-absorbing resin having a high absorption rate.

  The absorption rate of the physiological saline by the Vortex method of the second water-absorbing resin contained in the secondary water-absorbing layer 44 is preferably 1 to 30 seconds, more preferably 2 to 25 seconds, and still more preferably 3 to 20 Seconds.

  There is a positive difference between the absorption rate of the first water absorbent resin used for the primary water absorbent layer 42 and the absorption rate of the second water absorbent resin contained in the secondary water absorbent layer 44. Is preferred. The larger the difference, the more the liquid retention in the primary water absorption layer 42 is avoided, and the liquid retention in the secondary water absorption layer is more efficiently exhibited. Specifically, the difference between the two is preferably 10 seconds or more, more preferably 15 seconds or more, and further preferably 20 seconds or more.

  Regardless of whether the water-absorbent resin used in the present invention is a primary water-absorbing layer or a secondary water-absorbing layer, 100 to 600 μm is preferable, and 200 to 500 μm is more preferable. From the viewpoint of avoiding the use of fine powder having poor fluidity as a powder and enhancing the basic performance of the absorber 23, the median particle diameter of the water-absorbent resin is preferably 100 μm or more to prevent the absorber 23 from becoming hard, Further, from the viewpoint of improving the tactile sensation by reducing the jerky feel, the median particle diameter of the water absorbent resin is preferably 600 μm or less.

The total content of the first water-absorbing resin and the second water-absorbing resin contained in the absorber 23 is preferably in the range of 100 to 1000 g / m ² , more preferably 200 to 800 g / m ² depending on the required absorption performance. ² , more preferably 250 to 600 g / m ² . From the viewpoint of exhibiting sufficient absorption performance as the absorber 23 and maintaining a smooth feeling after absorption, the total content is preferably 100 g / m ² or more, ultra-thin, soft and easy to move. From the viewpoint, the total content is preferably 1000 g / m ² or less.

  The content ratio of the first water-absorbing resin in the primary water-absorbing layer 42 and the second water-absorbing resin in the secondary water-absorbing layer 44 is (first water-absorbing resin in the primary water-absorbing layer 42) / (secondary water-absorbing layer 42). The second water-absorbing resin in the water-absorbing layer 44) is preferably 98/2 to 50/50. The ratio of the primary water absorption layer 42 is preferably 98 or less from the viewpoint of sufficiently exhibiting the absorbency of the secondary water absorption layer 44, and from the viewpoint of reducing liquid return of the primary water absorption layer, The ratio is preferably 50 or more.

  The content ratio of the adhesive in the primary water-absorbing layer 42 and the secondary water-absorbing layer 44 is set to the content (mass basis) of the first water-absorbing resin or the second water-absorbing resin in order to fix the water-absorbing resin. On the other hand, it is preferably 0.05 to 2.0 times. If it is less than 0.05 times, the fixing of the water absorbent resin is insufficient, and if it exceeds 2.0 times, the water absorption of the water absorbent resin is inhibited or the sheet becomes hard. More preferably, it is the range of 0.1 to 1.5 times.

  As a composition of the 1st absorptive resin and the 2nd absorptive resin, a publicly known thing can be used and there are a polyacrylic acid type, a starch type, a cellulose type, etc.

  Adhesives have a melting point of about 100 to 180 ° C. and synthetic rubbers such as styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, or olefins such as ethylene-vinyl acetate copolymers. Hot melt adhesives of the system are used. As a method for applying the hot melt adhesive, there are a curtain coating method and a spiral method in which a molten adhesive is applied in a non-contact manner from a nozzle, and a known method such as a slot method can be used for the contact type.

  Furthermore, by applying heat embossing to the entire absorbent body 23 in which the upper hydrophilic nonwoven fabric 41, the primary water absorbent layer 42, the intermediate hydrophilic nonwoven fabric 43, the secondary water absorbent layer 44, and the lower hydrophilic nonwoven fabric 45 are integrated with an adhesive. In addition, it is possible to efficiently diffuse the liquid throughout the absorbent body 23 and to further enhance the fixing of the water absorbent resin. The emboss pattern is not particularly limited to a straight line, a curve, a dot shape, etc., and the pattern shape is also appropriately selected to efficiently diffuse the liquid, such as a lattice shape, a wavy shape, an akon pattern (acorn continuous shape). The

  Moreover, in order to obtain a thing with much absorption amount, it is also possible to make a multistage water absorption sheet | seat by superimposing a plurality of the absorbers 23 of the said structure.

The intermediate hydrophilic nonwoven fabric 43, the upper hydrophilic nonwoven fabric 41, and the lower hydrophilic nonwoven fabric 45 constituting the absorbent body 23 can be used as long as they are 20 g / m ² or more, but at least one is a spunlace nonwoven fabric. Is preferred. Furthermore, it is still more preferable if it is the lower hydrophilic nonwoven fabric 45. This is because the spunlace nonwoven fabric has high hydrophilicity and can itself retain water to temporarily hold the liquid. As the spunlace nonwoven fabric, rayon, cotton cellulose, and synthetic fiber can be used. The basis weight can be appropriately selected, but 20 g / m ² or more is preferable. Other than the spunlace nonwoven fabric, an air-through nonwoven fabric, a point bond nonwoven fabric, and a spunbond nonwoven fabric made of synthetic fibers such as polypropylene, polyethylene, and polyester can be used. In the present invention, an air-through nonwoven fabric that is particularly excellent in preventing liquid return is suitable.

  A hydrophilic nonwoven fabric 25 is provided between the absorbent body 23 and the back sheet 22. The liquid that has not been completely absorbed by the secondary water absorption layer 44 in the absorbent body 23 is finally absorbed by the hydrophilic nonwoven fabric 25 to prevent the liquid from returning to the upper part. The hydrophilic nonwoven fabric 25 is preferably a wood pulp-based airlaid nonwoven fabric. Or what laminated | stacked fluff pulp may be used. A hydrophilic layer such as a hydrophilic nonwoven fabric has a water absorption of 5 g / g or more. Moreover, what laminated | stacked fluff pulp and contained 50 mass% or less water-absorbing resin becomes more excellent in the point of water absorption performance. In addition to laminating the hydrophilic nonwoven fabric 25 alone, it is possible to sandwich or wrap the upper and lower sides with a nonwoven fabric or a pulp sheet.

  Further, a liquid diffusive sheet 26 is provided between the absorber 23 and the top sheet 21. The liquid first diffuses and absorbs sequentially through the top sheet 21 to the absorber 23, but it is preferable that the liquid diffuses back and forth and right and left as soon as possible after absorption. Therefore, the liquid diffusable sheet 26 is provided under the top sheet 21 to promote diffusion, and the liquid can be widely moved to the water absorbent 23 and can be efficiently absorbed.

The liquid diffusive sheet 26 is a hydrophilic nonwoven fabric having a thickness of 0.1 mm or more and a basis weight of 20 g / m ² or more, for example, an air-through nonwoven fabric made of a synthetic fiber system such as polypropylene, polyethylene, polyester, a point bond nonwoven fabric, Spunbond nonwoven fabric can be used. In the present invention, an air-through nonwoven fabric that is particularly excellent in preventing liquid return is suitable. The thickness is measured under a load of 3432 Pa using a Peacock dial gauge manufactured by Ozaki Seisakusho.

  In addition to the above configuration, a deodorant having a deodorizing function is added together with the water-absorbing resin, or the deodorant is applied to a nonwoven fabric or a pulp sheet, and a supported sheet is appropriately laminated in the above configuration. Can do.

  By doing in this way, since the absorber 23 is ensured thin, it becomes realizable that the interior body 20 and the exterior body 10 have a thickness difference of 2.5 mm or less. For this reason, compared with the conventional underpants type absorbent article, since thickness is reduced and it resembles the structure of a general underpants type underwear, a user feels uncomfortable at the time of wearing and a feeling of resistance to wearing.

(Example)
The following pants-type absorbent articles were produced. The inner body, air-through nonwoven 20 g / m ² as a topsheet, using a breathable polyethylene film 32 g / m ² as a backsheet, between the topsheet and the backsheet, as an absorber, the upper hydrophilic nonwoven fabric air-through nonwoven fabric having a basis weight of 20 g / ^{m 2,} an intermediate hydrophilic nonwoven air-through nonwoven fabric having a basis weight of 20 g / ^{m 2,} the lower hydrophilic non-woven on the basis weight 35 g / ^{m 2} rayon-based spun lace nonwoven fabric, a first water-absorbent resin of SAP sheet The first water-absorbing resin in the primary water-absorbing layer has an absorption rate of 42 seconds, a median particle diameter of 380 μm, and the first water-absorbing layer has a first water-absorbing layer content of 290 g / m ² . The absorbent resin has an absorption rate of 20 seconds, a median particle diameter of 310 μm, and a mass ratio of the first water-absorbing resin of the primary water-absorbing layer to the second water-absorbing resin of the secondary water-absorbing layer is 50/50. Was used wood pulp based having a basis weight of 75 g / m ² air-laid nonwoven fabric in the hydrophilic nonwoven fabric layer. Three pieces of 940 decitex urethane thread rubber extending in the longitudinal direction along both sides of the interior body and extending to 200% were arranged to form leg gathers.

The exterior body, a urethane film having a thickness of 20μm having an opening at an aperture ratio of 14% between 20 g / m ² polypropylene spunbond nonwoven second layer was laminated at 250% elongation state, expansion and contraction direction and Cartesian direction A laminate (composite sheet) having stretchability and breathability was formed by ultrasonic bonding over the entire region in a linearly extending pattern. Arranged 6 pieces of 940 decitex urethane thread rubber stretched to 17 g / m ² polypropylene spunbond at the waistline end of the exterior body and folded the upper end of the waistline part of the exterior body outward, Formed waist gathers.

  By adopting such a configuration, a paper diaper having a good texture, being easy to wear off and having a good fit as compared with a conventional pant-type absorbent article can be obtained. Moreover, since the absorber 23 is ensured thinly, compared with the conventional pants-type absorbent article, the thickness is reduced, and the structure is similar to that of a general pants-type undergarment. The feeling of resistance to

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment and embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above embodiment. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Pants type absorbent article 10 Exterior body 11 Abdomen side part 12 Back side part 13 Crotch part 14 Nonwoven fabric 15 Elastic film 16 Upper edge part 17 Elastic elastic member 18 Leg gathers 19 Trunk part 20 Interior body 21 Top sheet 22 Back sheet 23 Absorber 24 Three-dimensional gather 25 Hydrophilic nonwoven fabric 26 Liquid diffusive sheet 31 Side edge (abdominal side)
32 Side edge (back side)
41 Upper hydrophilic nonwoven fabric 42 Primary water absorbing layer 43 Intermediate hydrophilic nonwoven fabric 44 Secondary water absorbing layer 45 Lower hydrophilic nonwoven fabric

Claims (6)

A method for manufacturing a pant-type absorbent article,
The pant-type absorbent article is
An exterior body formed in the form of pants;
An interior body that is located on the skin contact surface side of the exterior body and absorbs body fluids;
With
The exterior body is
The ventral side,
The dorsal side,
A crotch portion provided so as to connect between the ventral side portion and the dorsal side portion ,
The interior body is
A top sheet that contacts the skin;
A back sheet in contact with the exterior body;
An absorber provided by being laminated between the top sheet and the back sheet,
The ventral part and the dorsal part are formed from a composite sheet constituted by laminating and laminating the first nonwoven fabric, the stretchable film and the second nonwoven fabric in this order from the skin contact surface side,
The stretchable film is a urethane film having an opening,
When the composite sheet has an air permeability measured based on JIS L 1096-A (Fragile method): 1990 of 150 cm ³ / cm ² · sec or more in a non-stretched state and stretched 150% in the stretching direction And having an air permeability measured based on JIS L 1096-A (Fragile method): 1990 of 50 cm ³ / cm ² · sec or more,
The absorber is bonded to the upper hydrophilic nonwoven fabric, the primary water absorbent layer containing the first water absorbent resin and the adhesive, the intermediate hydrophilic nonwoven fabric, and the second water absorbent resin in this order from the top sheet side. A secondary water-absorbing layer containing an agent, a lower hydrophilic nonwoven fabric,
Have
The manufacturing method of the pants-type absorbent article is formed by laminating the stretchable film between the first nonwoven fabric and the second nonwoven fabric in a stretched state, and extending in a pattern extending linearly in a direction perpendicular to the stretch direction. The manufacturing method of the underpants type absorbent article characterized by having the process of producing the composite sheet which comprises an exterior body by ultrasonically bonding over.   The manufacturing method of the underpants type absorbent article of Claim 1 whose 1st nonwoven fabric and 2nd nonwoven fabric which comprise the said composite sheet are polypropylene spun bond nonwoven fabrics. A liquid diffusive sheet is further provided between the top sheet and the absorber, and the liquid diffusible sheet is a hydrophilic nonwoven fabric having a thickness of 0.1 mm or more and a basis weight of 20 g / m ² or more. The manufacturing method of the underpants type absorbent article of Claim 1 characterized by the above-mentioned.   The method for producing a pant-type absorbent article according to claim 1, further comprising a hydrophilic nonwoven fabric between the back sheet and the absorbent body.   The method for producing a pants-type absorbent article according to claim 1, further comprising a pair of three-dimensional gathers on both longitudinal sides of the crotch part of the interior body.   The method for manufacturing a pants-type absorbent article according to claim 1, wherein the interior body is fixed to the exterior body at the crotch portion of the exterior body.

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