JP5337790B2 - Pants-type wearing article and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underpants-type wearing article in which the problem of getting stuffy when it is worn is solved. <P>SOLUTION: The underpants-type wearing article 10 includes an abdominal side part 21 to be disposed on the abdominal side of a wearer, a crotch part 13 to be disposed on the crotch, and a back side part 23 to be disposed on the back side, and the side edges 21A and 21B of the abdominal side part 21 and the side edges 23A and 23B of the back side part 23 are joined to form an underpants-like form. The abdominal side part 21 and the back side part 23 are configured from an exterior body 11 in which an inner layer material 31 and an outer layer material 33 are laminated, the exterior body 11 has a plurality of one-layer regions comprising the inner layer material 31 or the outer layer material 33 at intervals in the longitudinal direction of the exterior body 11, and the laminated regions where the inner layer material 31 and the outer layer material 33 are laminated are elastic in the waist-encircling direction of the exterior body 11. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a pants-type wearing article and a manufacturing method thereof.

  As a conventional pants-type diaper, the outer body formed to be disposed on the abdomen and the back side of the wearer, and the crotch disposed on the crotch portion of the wearer between the abdomen and the back side of the exterior body And an absorbent main body disposed on the crotch part are known (see, for example, Patent Document 1 and Patent Document 2).

  The exterior body has a two-layer structure in which an inner layer material and an outer layer material are laminated over almost the entire surface, and in order to configure the exterior body, a sheet in which the inner layer material and the outer layer material are bonded together with an elastic member interposed therebetween. Is used. Dividing the width of this sheet into two parts, placing the absorbent main body so as to pass between each sheet in a state where the divided sheets are arranged in parallel, bend the outer side part of each outer layer material constituting the sheet, and bend it Fix both ends of the absorbent body at the part. Subsequently, the sheets are folded near the center of the absorbent main body and the inner layer material is placed inside, and the stacked sheets are joined so as to sandwich the absorbent main body at predetermined intervals in the width direction. Then, the center part of a junction part is cut | disconnected and cut | disconnected in the width direction of a sheet | seat. As a result, a pants-type diaper including an exterior body formed by joining sheets and an absorbent main body fixed to the exterior body is completed (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-279077 Special table 2008-508082

A user's feeling of use similar to that of underwear is required for a pants-type diaper, and in a conventional pants-type diaper, the exterior body has a two-layer structure in which an inner layer material and an outer layer material are laminated over almost the entire surface. Therefore, further improvement in flexibility and breathability is expected. In particular, when an embossed sheet such as spunbond is used, the possibility has increased.
An object of the present invention is to solve the problem of stuffiness during wearing by softening the waist area of the exterior body of the pant-type diaper and improving the air permeability.

  The present invention has an abdominal side portion disposed on the abdomen side of the wearer, a crotch portion disposed on the crotch portion, and a back side portion disposed on the back side, and a side edge portion of the abdominal side portion, A pants-type wearing article that is formed in a pants shape by joining a side edge portion of a back side portion, and the abdomen side portion and the back side portion are an outer layer in which an inner layer material and an outer layer material are laminated. The exterior body has a plurality of one-layer regions made of the inner layer material or the outer layer material at intervals in the height direction of the exterior body, and the inner layer material and the outer layer material are laminated. The plaid type wearing article in which the laminated region is stretchable in the waist circumference direction of the exterior body is provided.

  In addition, the present invention is a method for manufacturing a pants-type wearing article, the first sheet material that is a constituent material of the exterior body is slit in the width direction to form a plurality of tape-shaped sheet material, A step of laminating and fixing the plurality of tape-shaped sheet materials to the second sheet material and fixing them to obtain an exterior body, and overlapping the exterior body with the second sheet material facing inward There is provided a method for manufacturing a pants-type wearing article, comprising: a step of joining at a predetermined interval in a width direction of the exterior body; and a step of cutting the exterior body in the width direction at the joint portion.

  The pants-type wearing article of the present invention maintains the same stretchability as the conventional pants-type wearing article and maintains the adaptability to the wearer's body and the mobility with respect to the movement of the body, and the action of the portion of the one-layer region This makes it possible to soften the waist area and significantly increase the air permeability of the same area, and drastically reduce stuffiness.

  By the method for producing a pants-type wearing article of the present invention, the above-described pants-type wearing article having improved stretchability, adaptability to the body, breathability and the like can be easily produced.

It is the perspective view which showed one preferable embodiment (1st Embodiment) of the underpants type wearing article of this invention. It is the disassembled perspective view which showed one preferable embodiment of the underpants type wearing article of this invention. It is the (1) perspective view and partial expanded perspective view which showed 1st Example of the underpants type wearing article, (2) principal part expanded sectional view, and (3) principal part enlarged plan view. It is the photograph copied from the side of the underpants type wearing article in the state where the underpants type wearing article of the 1st example was put on the dummy doll. It is (1) perspective view, (2) principal part expanded sectional view, and (3) principal part enlarged plan view which showed 2nd Example of the underpants type wearing article. It is (1) perspective view, (2) principal part expanded sectional view, and (3) principal part enlarged plan view which showed 3rd Example of the underpants type wearing article. It is (1) perspective view, (2) principal part expanded sectional view, and (3) principal part enlarged plan view which showed 4th Example of the underpants type wearing article. It is (1) perspective view, (2) principal part expanded sectional view, and (3) principal part enlarged plan view which showed 5th Example of the underpants type wearing article. It is the perspective view which showed 2nd Embodiment of the underpants type wearing article. It is the perspective view which showed the outline of the manufacturing process of the 1st embodiment which concerns on preferable one Embodiment (1st Embodiment) of the manufacturing method of the underpants type wearing article of this invention. It is the (1) top view and (2) front view which showed the principal part of the 1st embodiment typically. It is the (1) top view and (2) front view which showed typically the principal part of the manufacturing process of the 2nd embodiment which concerns on the manufacturing method of the underpants type wearing article of this invention. It is the (1) top view and (2) front view which showed typically the principal part of the manufacturing process of the 3rd embodiment which concerns on the manufacturing method of the underpants type wearing article of this invention. It is (1) top view and (2) front view which showed typically the principal part of the manufacturing process of the 4th embodiment which concerns on the manufacturing method of the underpants type wearing article of this invention. It is the perspective view which showed the outline of the manufacturing process of the 5th embodiment which concerns on the manufacturing method of the underpants type wearing article which concerns on this invention. It is the perspective view which showed the outline of the manufacturing process which concerns on preferable one Embodiment (2nd Embodiment) of the manufacturing method of the underpants type wearing article which concerns on this invention.

A preferred embodiment (first embodiment) of a pants-type wearing article according to the present invention will be described below with reference to the perspective view shown in FIG. 1 and the exploded perspective view shown in FIG.
In the pant-type wearing articles 10 and 100 of the present specification, the height direction of the pant-type wearing article is defined as the Y direction, and the width direction of the pant-type wearing article is defined as the X direction, which is also referred to as a “waist circumference direction”.

As shown in FIGS. 1 and 2, a pants-type wearing article 10 according to the present embodiment is, for example, a pants-type diaper, and includes an abdomen side portion 21 arranged on the wearer's belly side and an inseam arranged on the crotch portion. It has the part 13 and the back side part 23 distribute | arranged to the back side. Hereinafter, the pants-type diaper 10 will be described in detail.
The pants-type diaper 10 includes an exterior body 11 that forms an abdominal side portion 21 and a back side portion 23, and an absorbent main body 40 that forms a crotch portion 13.
In the exterior body 11, one side edge portion 21 </ b> A of the abdominal side portion 21 and one side edge portion 23 </ b> A of the back side portion 23 are joined, and the other side edge portion 21 </ b> B and back side portion 23 of the abdominal side portion 21 are joined. The one side edge portion 23B is joined to form an annular shape.
Moreover, the crotch part 13 is comprised by the absorptive main body 40 which bridge | crosses the stomach side part 21 and the back side part 23, and is distribute | arranged to a wearer's crotch part. A pant-type body is formed by the absorbent main body 40 that spans the outer body 11 and the crotch part 13 that are formed into an annular shape.
The absorbent main body 40 forms a crotch portion, and extends to the vicinity of the waist opening 12 below the exterior body 11 at the abdominal side portion 21 and the back side portion 23, and is fixed to the exterior body 11. Thereby, the exterior body 11 has the center area | region to which the absorptive main body 40 was fixed, and the both-sides area | region which is not fixed in the waist area. The “waist circumference region” is a region between the position where the outer base of the thigh is located in the body height direction (Y direction) that is the direction from the upper edge of the waist opening 12 to the lower part thereof. Say.

  The exterior body 11 is configured by laminating an inner layer material 31 and an outer layer material 33, and a one-layer region where one layer of the inner layer material 31 exists is spaced in the height direction (Y direction) of the exterior body 11. Have more than one. In the drawing, the inner layer material 31 is present in one layer region, and the outer layer material 33 is stacked on the inner layer material 31 at intervals in the height direction of the exterior body 11.

  The laminated region where the inner layer material 31 and the outer layer material 33 are laminated has elasticity in the width direction (X direction) of the pant-type diaper 10. The laminated region may include an elastic body 35 between the inner layer material 31 and the outer layer material 33. In this case, the elastic body 35 is sandwiched between the inner layer material 31 and the outer layer material 33 in an expanded state, and thereby has elasticity. Alternatively, as will be described in detail later, both or one of the inner layer material 31 and the outer layer material 33 may be made of a stretchable material.

As a sheet as a material of the inner layer material 31 and the outer layer material 33, for example, non-woven fabrics, woven fabrics, knitted fabrics, and resins by various manufacturing methods such as air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric, respectively. A film etc. are mentioned, The sheet | seat material etc. which carry out lamination | stacking integration of these can also be used.
In particular, the inner layer material 31 is preferably formed from a nonwoven fabric from the viewpoint of improving air permeability and texture, and is formed from a water-repellent nonwoven fabric from the viewpoint of preventing excrement leakage. Is preferred.

Next, the absorbent main body 40 will be described. As shown in FIG. 2, the absorbent main body 40 includes, as an example, a top sheet 41, a back sheet 42, and an absorbent core 43 having liquid retaining properties interposed therebetween. The absorbent core 43 is covered with the covering sheet 44 by bending the covering sheet 44 in the direction of the arrow at the position of the dotted line shown in the drawing. Further, a pair of side sheets 46 and 46 forming an inner three-dimensional gather 45 are disposed on the skin contact surface side. The back sheet 42 and the crotch sheet 47 are arranged in this order on the non-skin contact surface side.
This absorptive main body 40 can use the material normally used for this kind of diaper, and is not specifically limited.

  The top sheet 41 is preferably formed of a hydrophilic nonwoven fabric. The hydrophilic nonwoven fabric is an air-through nonwoven fabric, a point-bonded nonwoven fabric, a spunbonded nonwoven fabric, a spunlace nonwoven fabric, and a three-dimensionally shaped nonwoven fabric. A fiber that has been subjected to a hydrophilic treatment with a composite fiber of polyethylene terephthalate and polyethylene can be preferably used. Moreover, the sheet | seat which opened the resin film as the surface sheet 41 can also be used.

  The back sheet 42 is not particularly limited as long as it has waterproofness and moisture permeability. For example, a film is formed by melt-kneading a hydrophobic thermoplastic resin, a fine inorganic filler made of calcium carbonate or the like or an incompatible organic polymer, and the film is obtained by uniaxial or biaxial stretching. A porous film is mentioned. Examples of the thermoplastic resin include polyolefin. Examples of the polyolefin include high to low density polyethylene, linear low density polyethylene, polypropylene, polybutene and the like, and these can be used alone or in combination. The inseam sheet 47 can use various non-woven fabrics in order to give a cloth-like appearance.

As the absorbent core 43, for example, a fiber assembly or a combination of this and an absorbent polymer can be used. As the fibers constituting the fiber assembly, hydrophilic natural fibers such as pulp fibers, synthetic fibers (preferably subjected to hydrophilic treatment), and the like can be used. The basis weight is not particularly ^limited, preferably ^{150g / m 2 ~500g / m 2} . The covering sheet 44 includes thin paper (thin paper) such as hydrophilic tissue paper, non-woven fabric made of hydrophilic fibers such as cotton and rayon, and non-woven fabric formed by subjecting synthetic resin fibers to hydrophilic treatment (spunbond- Melt blown-spunbond (SMS), spunbond-meltblown-meltblown-spunbond (SMMS), spunbond-spunbond-meltblown-spunbond (SSMS), etc.) can be used.

  It is preferable to use a water-repellent nonwoven fabric for the side sheet 46, and specifically, a spunbond nonwoven fabric, a spunbond-meltblown (SM) nonwoven fabric, an SMS nonwoven fabric, or the like is used.

  In the pants-type diaper 10 of this embodiment, the outer layer material 33 is not present, and a plurality of one-layer regions in which the inner layer material 31 is present are provided at intervals in the body height direction of the exterior body 11. While maintaining the same stretchability as that of the diaper and maintaining the wearability to the body and the mobility of the body, the breathability can be remarkably enhanced in the portion of the one layer region. Therefore, it is possible to greatly reduce stuffiness. In addition, since the amount of the outer layer material 33 used can be reduced, a so-called environment-friendly product can be obtained and the product cost can be reduced. Moreover, the softness of the exterior body 11 improves by having a 1 layer area | region, and the operation | movement at the time of wear becomes smooth, and a comfortable feeling becomes good.

  Next, an example of the arrangement configuration of the outer layer material 33, the inner layer material 31, and the elastic body 35 will be described with respect to the preferred embodiment. First, although the 1st Example of the underpants type diaper 10 of 1st Embodiment is demonstrated, a different point is demonstrated about the below-mentioned other Example and 2nd Embodiment. The points that are not particularly described are the same as those in the first embodiment and the first example, and the described descriptions are applied as appropriate. Moreover, the same code | symbol is attached | subjected to the same material and part.

  A first embodiment of the pant-type diaper 10 will be described with reference to FIG. As shown in FIG. 3, the pants-type diaper 10 (10A) of the first example is elastic with an adhesive (not shown) such as a hot-melt adhesive in the pant-type diaper 10 of the first embodiment described above. The outer layer material 33 is bonded to the inner layer material 31 at a predetermined interval in the height direction (Y direction) of the pant-type diaper 10 via the body 35. The elastic body 35 is fixed to the outer layer material 33 and the inner layer material 31 in an expanded state. The pants-type diaper 10 uses the same number of outer layer materials 33 as the number of elastic bodies 35 to be attached. However, a plurality of elastic bodies 35 may be arranged for one outer layer material 33. In addition, in the principal part expanded sectional view of FIG.3 (2), in order to coat | cover the part which attached the absorptive main body 40 (not shown), the state which turned up the inner layer material 31 to the skin contact surface side is shown. Yes.

  In the central region of the exterior body 11 to which the absorbent main body 40 is fixed, the elastic body 35 is cut over a plurality of locations, and the laminated region of the inner layer material 31 and the outer layer material 33 has substantial stretchability. Absent.

  The width of the outer layer material 33 and the interval for bonding the outer layer material 33 are set as appropriate. For example, the width of the outer layer material 33 is preferably substantially equal to or greater than the width of the elastic body 35. For example, the width of the outer layer material 33 is preferably 0.5 mm to 60 mm, and the pasting interval of the outer layer material 33 is preferably 1 mm to 40 mm. More preferably, the width of the outer layer material 33 is 5 mm to 10 mm, and the interval between the outer layer materials 33 is 5 mm to 10 mm. Thus, if the width | variety of the outer-layer material 33 and a sticking space | interval are set, the wearing comfort of the underpants type diaper 10 will become a more favorable thing. Furthermore, by making the bonding interval equal, the effect of uniformly dispersing the stress applied to the body due to the contraction of the elastic body is obtained, and the appearance appearance (regularity appearance) is also enhanced. can get.

  Since the end portion in the width direction (end portion in the height direction of the diaper) of the outer layer material 33 is a free end, the outer layer material 33 contracts due to the contraction when the elastic body 35 is released, and the frill 36 (enlarged perspective view). See). For this reason, there exists an effect | action that cuteness can be created as the whole diaper. Further, the bonding position of the outer layer material 33 with the inner layer material 31 is not limited to the central portion in the width direction (Y direction) of the outer layer material 33, and may be biased in either of the width directions. That is, the outer layer material 33 may have a long distance from the bonding position with the inner layer material 31 to one edge in the width direction and a short distance to the other edge. Thus, by changing the distance from the bonding position to the edge, frills are likely to be formed in the longer distance.

Further, the side seal portion 25 is a portion where the side edge portion of the abdomen side portion 21 of the exterior body 11 and the side edge portion of the back side portion 23 of the exterior body 11 are respectively joined by seal bonding such as embossing. For example, in a state where the outer layer material 33 (33A) of the ventral side portion 21 and the outer layer material 33 (33B) of the back side portion 23 face each other, the inner layer material 31 (31A) of the ventral side portion 21 and the dorsal side portion 23 Inner layer materials 31 (31B) are joined together. Therefore, in the side seal portion 25, the elastic body 35 (35 </ b> A) disposed on the ventral side portion 21 and the elastic body 35 (35 </ b> B) disposed on the back side portion 23 are disposed to face each other via the inner layer material 31. .
This configuration can also be applied to an example using the elastic body 35 described later and the second embodiment. Further, the present invention can be applied to an embodiment that does not use the elastic body 35 described later, except for the elastic body 35.

  In the side seal portion 25, the portion where the inner layer material 31 and the outer layer material 33 are laminated is a portion having a high bonding strength, and the region having only the inner layer material 31 is a portion having a low bonding strength. For this reason, it becomes easy to peel a junction part only in the area | region of an inner layer material. Furthermore, since it has the area | region only of the inner-layer material 31, the softness | flexibility of the side seal part 25 is improved, the feeling of wearing becomes good, and the touch with respect to the skin by the side of a skin contact surface and a touch become better.

  As the material of the inner layer material 31 and the outer layer material 33, the sheet described in the first embodiment can be used. Moreover, as a material of the elastic body 35, a normal elastic material used for absorbent articles such as diapers and sanitary napkins can be used. For example, as a material, synthetic rubber such as styrene-butadiene, butadiene, isoprene, neoprene, etc. , Natural rubber, EVA, stretchable polyolefin, polyurethane, etc. The shape of the cross-section is rectangular, square, circular, polygonal or other thread-like or string-like (flat rubber, etc.), or multifilament type Or the like can be used.

In the pant type diaper 10A of the first example, the effects described in the pant type diaper 10 of the first embodiment are obtained. At the same time, stretchability is imparted to the exterior body 11 in the laminated region of the outer layer material 33 and the inner layer material 31 in which the elastic body 35 is disposed. This stretchability improves the suitability of the pants-type diaper. Further, as shown in the enlarged perspective view in FIG. 3 (1), since the width direction end (end of the diaper in the height direction) of the outer layer material 33 is a free end, the extension force of the elastic body 35 is solved. When it is removed, the outer layer material 33 is contracted by the contraction, and a frill 36 is formed. For this reason, there exists an effect | action that cuteness can be created as the whole diaper. Furthermore, since the elastic body 35 is covered with the outer layer material 33, the elastic body 35 is protected by the outer layer material 33. As a result, an external force is not directly applied to the outer layer material 33, so that the elastic body 35 is hardly cut.
Further, as shown in FIG. 4, the outer layer material 33 may be a colored or patterned sheet. By using such a sheet (a belt-like sheet that is darkly depicted in the lateral direction in the photograph), it is possible to provide the pant-type diaper 10 in which the laminated region is easily noticeable and has excellent design.

  In the first embodiment shown in FIG. 3, the configuration in which the outer layer material 33 is bonded to the inner layer material 31 via the elastic body 35 at a predetermined interval is shown. However, conversely, for example, the elastic body 35 is attached to the outer layer material 33. A configuration in which the inner layer material 31 slit therebetween is bonded to a predetermined interval by a hot melt adhesive may be used.

Next, a second embodiment of the pant-type diaper 10 will be described with reference to FIG. As shown in FIG. 5, the pants-type diaper 10 (10 </ b> B) of the second example is the same as the pants-type diaper 10 of the first embodiment described above, with the outer layer material 33 being disposed at predetermined intervals via the elastic body 35. 31 is fixed to a seal portion 37. The width of the outer layer material 33 and the interval between the outer layer materials 33 are the same as in the first embodiment. In this configuration, each elastic body 35 is in an expanded state and both ends thereof are fixed by bonding with an adhesive 39, thereby imparting stretchability to the entire exterior body 11. Each elastic body 35 is not fixed to the outer layer material 33 and the inner layer material 31 except at both ends thereof. Therefore, in the laminated region of the outer layer material 33 and the inner layer material 31, good stretchability can be obtained without impairing the stretchability of the elastic body 35. In the central region of the exterior body 11 to which the absorbent main body 40 is fixed, the laminated region of the outer layer material 33 and the inner layer material 31 has elasticity.
Further, in this configuration, it is possible to create a wrinkle by regularly arranging the seal portion 37 in a portion where the inner layer material 31 and the outer layer material 33 are two layers with the elastic body 35 therebetween. In this second embodiment, the gap between the outer layer material 33 and the inner layer material 31 is created between the outer layer material 33 and the inner layer material 31 in the height direction (Y direction) by the folds, so that the air permeability is improved. Hida also gives the product a design aesthetic.

  In the underpants type diaper 10 (10B) of the second example, the same effect as the underpants type diaper 10 of the first embodiment described above can be obtained. At the same time, the seal layer 37 is formed at intervals on the side of the outer layer material 33 in the waist circumference direction, and the outer layer material 33 is attached to the inner layer material 31, so that there is a gap between the outer layer material 33 and the inner layer material 31. Air permeability is also obtained in the width direction of the outer layer material 33 (in the direction of the arrow Y in the drawing). Therefore, the air permeability in the portion of the inner layer material 31 where the outer layer material 33 is not provided can be ensured in the portion of the inner layer material 31 to which the outer layer material 33 is attached. Therefore, although it is the exterior body 11 which has a lamination | stacking area | region, it can provide the underpants type diaper 10 (10B) which does not lose softness, is excellent in a stretching property, is highly breathable, and is very hard to stuffy.

A third embodiment of the pant-type diaper 10 will be described with reference to FIG. As shown in FIG. 6, the pants-type diaper 10 (10C) of the third example is the same as the pants-type diaper 10 of the first embodiment described above, but the outer layer material 33 itself is stretchable in the longitudinal direction (waist circumference direction). The outer layer material 33 is attached to the inner layer material 31 with an adhesive 32 in an expanded state. As the adhesive, for example, a hot melt adhesive or a double-sided adhesive tape is used.
Here, the stretchability of the outer layer material 33 itself refers to, for example, stretchability that can replace the stretchability imparted by the elastic body.

As the outer layer material 33 having stretchability, a stretchable sheet such as a nonwoven fabric containing elastic fibers or an elastic film can be used. When emphasizing appearance such as touch or cloth, the surface of these stretchable sheets is preferably in the form of having a fiber layer. When this fiber layer is non-stretchable, the fiber layer is made stretchable by stretching or the like so that the non-stretchable fiber layer does not hinder the stretchability of the stretchable sheet. The stretching process includes, for example, a tooth gap process that partially cuts the bond between fibers or extends the fiber in the fiber layer, thereby exhibiting stretchability without hindering stretchability of the stretchable sheet. The As shown in the enlarged plan view of the main part of FIG. 6 (3), the surface of the outer layer material 33 is formed with irregularities (concave grooves 34) on the surface of the fiber layer.
For example, the grooves 34 are formed at equal intervals. In addition, when changing the degree to which elasticity is provided for every position, it is also possible to change the space | interval of the groove | channel 34. FIG. For example, when the thickness of the outer layer material 33 is 0.01 mm to 0.2 mm, the interval between the grooves 34 is set to about 2 mm to 5 mm in a region where strong stretchability is desired, and the interval between the grooves 34 is desired in a region where weak stretchability is desired. Is about 0.5 mm to 2 mm. The interval between the grooves 34 also varies depending on the thickness of the outer layer material 33. In addition, the processing method will not be limited if the outer-layer material 33 has the desired elasticity by the groove | channel 34. FIG.
The width of the outer layer material 33 and the interval between the outer layer materials 33 are the same as in the first embodiment.
The outer layer material 33 on the water-absorbing main body 40 is also subjected to tooth gap processing as stretching. After the stretching process, the outer layer material 33 is elongated and joined to the inner layer material 31. After joining, the outer layer material 33 and the inner layer material 31 are heat-insulated (cut by an elastic body) at the corresponding portions on the absorbent main body 40, so that the outer layer material 33 becomes inelastic and loses its elasticity. The tooth gap attached to the outer layer material 33 on the main body 40 becomes inconspicuous.

  As the outer layer material having stretchability, for example, (1) a sheet in which an extensible fiber layer is integrated on both sides or one side of an elastic fiber layer, (2) on both sides or one side of a net-like elastic sheet, A sheet in which stretchable fiber layers are integrated, (3) a sheet in which stretchable fiber layers are integrated on both sides or one side of an elastic sheet made of an elastic film, and (4) one without crossing each other. A stretchable sheet or the like in which a large number of elastic filaments arranged so as to extend in the direction are joined to a stretchable nonwoven fabric over their entire length in a substantially non-stretched state can be preferably used.

  As the sheet of (1), for example, (a) a substantially inelastic non-elastic fiber layer is disposed on at least one surface of the elastic fiber layer, and both fiber layers have a fiber form of the constituent fibers of the elastic fiber layer. In this state, the entire surface is joined by thermal fusion at the intersection of the fibers, and a part of the constituent fibers of the inelastic fiber layer enters the elastic fiber layer, and a part of the constituent fibers of the elastic fiber layer is inelastic. Examples include stretchable nonwoven fabrics that are in either or both of the states of entering the fiber layer. Moreover, as said (1)-(3) sheet | seat, it has (b) the elastic layer which has elastic elasticity, and a substantially inelastic nonelastic fiber layer, and both the said layers are laminated | stacked on the thickness direction. A stretchable sheet or the like obtained by stretching a laminated sheet that is partially bonded to each other can be preferably used. As one means for obtaining these stretched and stretchable fiber layers and nonwoven fabrics (1) to (3), it is preferable to perform the above-described tooth gap processing.

  In the stretchable nonwoven fabric of (a), the intersection between the constituent fiber of the elastic fiber layer and the constituent fiber of the non-elastic fiber layer is heat-sealed at and near the interface between the elastic fiber layer and the non-elastic fiber layer. And substantially uniformly bonded over the entire surface. By joining all over, it is prevented that both layers are separated and a space is formed, and it becomes a stretchable nonwoven fabric having a multi-layer structure with a sense of unity like a single nonwoven fabric. The state in which the constituent fibers of the elastic fiber layer maintain the fiber form means that even if most of the constituent fibers of the elastic fiber layer are given heat, pressure, etc., a film or a film containing fibers A state that is not transformed into a structure. Further, in the elastic fiber layer, the intersections of the constituent fibers are thermally fused in the layer. Similarly, in the non-elastic fiber layer, the intersection of the constituent fibers is thermally fused in the layer.

When the non-elastic fiber layer is arranged on both surfaces of the elastic fiber layer, at least one of the surfaces of the elastic fiber layer is in a state in which a part of the constituent fiber enters the elastic fiber layer and one of the constituent fibers of the elastic fiber layer. The portion is in one or both of the states in which the portion has entered at least one inelastic fiber layer.
The elastic fiber layer has the property of being stretchable and contracting when released from the stretched force. Further, it is an aggregate of fibers having elasticity. The elastic fiber layer may be in the form of a web or a nonwoven fabric made of elastic fibers. For example, it may be a nonwoven fabric formed by a spinning blow method, a spun bond method, a melt blow method, or the like. Particularly preferred is a web obtained by the spinning blow method. As the constituent fiber of the elastic fiber layer, for example, a fiber made of thermoplastic elastomer, rubber or the like can be used. In particular, fibers made from thermoplastic elastomers can be melt-spun using an extruder in the same way as ordinary thermoplastic resins, and the fibers thus obtained are easily heat-sealed. Is suitable for the stretchable nonwoven fabric of this embodiment. Examples of the thermoplastic elastomer include styrene elastomers such as SBS, SIS, SEBS, and SEPS, olefin elastomers, polyester elastomers, and polyurethane elastomers. These can be used individually by 1 type or in combination of 2 or more types.

  The inelastic fiber layer has extensibility but is substantially inelastic. The extensibility here refers to the case where the constituent fibers themselves are stretched, and even if the constituent fibers themselves are not stretched, the two fibers that have been thermally fused at the intersection of the fibers are separated, or the fibers are thermally fused. For example, the three-dimensional structure formed by a plurality of fibers may be structurally changed, the constituent fibers may be broken, and the whole fiber layer may be elongated. Examples of the fibers constituting the inelastic fiber layer include fibers made of polyethylene (PE), polypropylene (PP), polyester (PET or PBT), polyamide, and the like. The fibers constituting the inelastic fiber layer may be short fibers or long fibers, and may be hydrophilic or water repellent. Moreover, a core-sheath type or side-by-side composite fiber, a split fiber, a modified cross-section fiber, a crimped fiber, a heat-shrinkable fiber, or the like can be used. These fibers can be used singly or in combination of two or more. The inelastic fiber layer can be a continuous filament or short fiber web or nonwoven.

  In the stretchable sheet (b), a substantially inelastic non-elastic fiber layer is laminated on both sides or one side of an elastic layer having elastic stretchability, and these are partially joined in a regular pattern. It can be obtained by stretching the laminated sheet.

  The effect of the pant-type diaper 10 (10C) of the third example is as described in the pant-type diaper 10 of the first embodiment. Further, in this embodiment, an elastic body disposed between the inner layer material 31 and the outer layer material 33 is not required, and the outer layer material 33 is subjected to a stretching process having irregularities, so that a soft appearance and feel are obtained. By making the application width of the adhesive 32 narrower than the width of the outer layer material 33, frills can be formed in the outer layer material 33. In addition, the elastic material can be reduced.

  In addition, by changing the width of the outer layer material 33, the stretching force also changes, and it is possible to adjust to an appropriate tightening pressure corresponding to each part such as the waist, the iliac bone, and the waist. For example, it is possible to increase the stretching force and increase the tightening pressure by increasing the width of the waist part and the iliac bone compared to other parts.

  In the pants-type diaper 10 of the third embodiment, if the stretchability of the laminated region is weak, the elastic body 35 of the first embodiment may be sandwiched between the outer layer material 33 and the inner layer material 31 as necessary. Good.

A fourth embodiment of the pant-type diaper 10 will be described with reference to FIG. In the pant diaper 10 (10D) of the fourth example, the same material as the pant diaper 10A of the first example was used in the pant diaper 10 of the first embodiment described above. In the pant-type diaper 10 of the first embodiment described above, as shown in FIG. 7, an outer layer material 33 and an inner layer material fixed via an elastic body 35 with an adhesive (not shown) such as a hot melt adhesive. 31 is stretched (for example, tooth gap processing) in the waist circumference direction (X direction). Thereby, the outer layer material 33 and the inner layer material 31 have extensibility. The elastic body 35 is fixed to the outer layer material 33 and the inner layer material 31 in an expanded state. As described above, the stretching method is not limited as long as the outer layer material 33 and the inner layer material 31 are stretchable.
The width of the outer layer material 33 and the interval between the outer layer materials 33 are the same as those in the first embodiment.

  In the pants-type diaper 10 (10D) of the fourth embodiment, the same effect as the pants-type diaper 10A of the first embodiment described above can be obtained. At the same time, the outer layer material 33 and the inner layer material 31 can be extended by performing a tooth gap process as an extension process. Accordingly, the stretchability is exhibited without inhibiting the stretchability of the elastic body 35, so that the wearability of the pant-type diaper 10D is enhanced.

  A fifth embodiment of the pant-type diaper 10 will be described with reference to FIG. As shown in FIG. 8, the pants-type diaper 10 (10 </ b> E) of the fourth example is the exterior body 11 of the inner-layer material 31 portion where the outer-layer material 33 is not formed in the pant-type diaper 10 of the first embodiment described above. In this structure, the holes 15 are formed in the inner wall. This configuration can be applied to the pants-type diaper 10 having all configurations described in the present specification. The holes 15 are formed at a predetermined interval. For example, although it depends on the arrangement interval of the outer layer material 33, it has a diameter that is at least smaller than the arrangement interval of the outer layer material 33, and the hole interval is preferably 101% or more and 500% or less of the diameter of the hole 15, for example. More preferably, it is 200% or more and 300% or less of the diameter of the hole 15. The hole 15 can be formed by a heated needle, laser processing, or the like.

  The underpants type diaper 10 (10E) of the fifth example has the same effect as the underpants type diaper 10 of the first embodiment described above. In this example, since the hole 15 is formed in the inner layer material 31, air permeability is further improved.

Next, 2nd Embodiment of the underpants type diaper of this invention is described with reference to FIG.
As shown in FIG. 9, a pant-type diaper 100 as an example of a pant-type diaper is configured such that an exterior body 11 is also formed on the crotch part 13, and the inner side (skin contact surface side) of the exterior body 11 formed on the crotch part 13. ) In which the absorbent main body 40 is arranged. Specifically, the exterior body 11 in the first embodiment described above includes the crotch portion 13 formed by continuously extending from the abdominal side portion 21 to the back side portion 23. An inner layer material 31 is formed on the back side portion 23, the abdominal side portion 21, and the crotch portion 13 of the exterior body 11, and the outer layer material 33 is spaced apart from the inner layer material 31 between the back side portion 23 and the abdominal side portion 21. They are stacked along the circumferential direction (X direction). Therefore, the outer layer material 33 is not laminated on the inner layer material 31 of the crotch part 13.

  Thus, the configuration of the outer layer material 33 according to the present invention can also be applied to the pant-type diaper 100 having an exterior body that is continuously formed on the back side from the abdomen through the crotch and improves the breathability thereof. be able to. Moreover, the material used for the outer layer material 33 can be reduced, and the product cost can be reduced.

  Next, regarding a first embodiment of a preferred embodiment (first embodiment) of a method for manufacturing a pant-type diaper of the present invention, a schematic perspective view of FIG. 10 and a main part of FIG. 11 are shown (1) plane. This will be described below with reference to the drawings and (2) front view. The 1st embodiment of a manufacturing method is one method of manufacturing above-mentioned underpants type diaper 10 (10A). In addition, about the point which is not demonstrated especially about the other embodiment mentioned later, the description explained in full detail regarding the 1st embodiment is applied suitably.

  As shown in FIGS. 10 and 11, for example, the first sheet material 1S is supplied from the upper side, the second sheet material 2S is supplied from the lower side, and further, the first sheet material 1S and the second sheet material 2S are supplied. The elastic body continuous member 3S to be the elastic body 35 is supplied between the two. The first sheet material 1 </ b> S forms the outer layer material 33, and the second sheet material 2 </ b> S forms the inner layer material 31. The first sheet material 1S (outer layer material 33), the second sheet material 2S (inner layer material 31), and the elastic body continuous member 3S (elastic body 35) are made of the same material as the above-described pants-type diaper 10.

  First, the outer sheet material slit cutter 211 divides the first sheet material 1S into a plurality of pieces in the width direction to form a tape-like sheet material 33T having a narrow width. Next, the separating means 213 separates the tape-like sheet materials 33T and 33T at a predetermined distance d1. The tape-like sheet material 33T (the divided first sheet material 1S) is formed in the width of each outer layer material 33 (33A, 33B) of the pant-type diaper 10A described above, and the interval when separated is also described above. It is formed in the interval of the outer layer material 33 of the pants-type diaper 10A.

  Although not shown in the drawing, the separating means is provided with a guide roll for each tape-like sheet material, spreads at a predetermined interval depending on the installation angle and position, or joined to the second sheet material 2S, or each tape-like sheet material. On the other hand, a sheet flow adjusting guide (meandering corrector) is provided, and means for joining with the second sheet material 2S is provided.

  In addition, a plurality of elastic body continuous members 3S are prepared in parallel, and in an expanded state, and with an adhesive (not shown) supplied by the adhesive coating device 215, Supplied together with the second sheet material 2S. Each elastic body continuous member 3S is supplied at a predetermined interval d2. At this time, it is preferable that the tape-like sheet material 33T is supplied so that the center in the width direction of the elastic body continuous member 3S is positioned at the center in the width direction. For example, a hot melt gun is used for the adhesive coating device 215, and a hot melt adhesive is used for the adhesive in this case.

In this way, the elastic continuous member 3S having a predetermined interval d2 is supplied between the nip rolls 217 and 218 while being extended on the second sheet material 2S. At the same time, each tape-like sheet material 33T is supplied on each elastic body continuous member 3S such that the elastic body continuous member 3S is positioned at the center in the width direction of the tape-like sheet material 33T.
Then, the second sheet material 2S, the elastic continuous member 3S, and the tape-shaped sheet material 33T are passed between the nip rolls 217 and 218, and the second is obtained by the hot melt adhesive attached to the elastic continuous member 3S by the pressure between the rolls. The sheet material 2S and the tape-shaped sheet material 33T are bonded via the elastic body continuous member 3S to obtain the exterior body continuous member 11S to be the exterior body 11. The adhesive may be supplied to either one or both of the tape-like sheet material 33T and the second sheet material 2S by the adhesive coating device 215 and bonded to the elastic body continuous member 3S.

Next, an elastic body cutting step is performed in which the elastic function of the elastic continuous member 3S in the portion to which the absorbent main body 40 of the second sheet material 2S is attached is not expressed. The elastic body cutting step uses, for example, a cut roll 219 formed with a non-functionalized region forming portion (not shown) that prevents the contraction force of the elastic body continuous member 3S from being expressed, and the exterior body continuous member 11S is nonfunctional. 11N can be formed. The non-functionalized region forming portion is configured by a large number of convex portions or cutter blades that divide the elastic body continuous member 3S, or a large number of emboss pins that harden the elastic body continuous member 3S by heat sealing.
The roll 220 facing the cut roll 219 is the receiving roll, and its peripheral surface is a smooth surface.

  Next, using the exterior body slit cutter 221, the exterior body continuous member 11 </ b> S is cut at the center in the width direction so as to form the abdomen side portion 21 of the exterior body and the back side portion 23 of the exterior body, Separate at a predetermined interval. The dimensions of the pants-type diaper 10 including the predetermined interval are appropriately selected according to the size and application.

  Next, the absorbent body 40 obtained by cutting the absorbent main body continuous body 40S supplied from the absorbent main body forming portion 4 is placed at a predetermined position between the ventral side portion 21 and the back side portion 23 of the exterior body continuous member 11S. To place. At this time, the absorptive main body 40 is arranged so that the longitudinal direction thereof is, for example, a perpendicular direction with respect to the ventral side portion 21 and the back side portion 23. The absorptive main body 40 is fixed to the exterior body continuous member 11S while maintaining the extended state of the exterior body continuous member 11S. For example, the absorbent main body 40 is fixed while maintaining the exterior body continuous member 11 </ b> S so as not to be contracted by the contraction force of the elastic body continuous member 3 </ b> S. In general, the absorbent main body 40 is also provided with an elastic member that contracts in the longitudinal direction thereof. Even in such a case, the outer body continues to be maintained while the absorbent main body 40 is not contracted. It fixes with respect to the member 11S. At that time, an adhesive is applied in advance to the absorbent main body 40 or the exterior body continuous member 11S.

  Subsequently, the outer end in the width direction of the exterior body continuous member 11S is folded back so as to cover both ends in the longitudinal direction of the absorbent main body 40, and the absorbent main body 40 is fixed at the folded portion. At that time, an adhesive is applied in advance to predetermined positions on the inner surface side of the folded portion, the absorbent main body 40, and the like.

  Next, the longitudinal direction of the absorbent main body 40 is folded in half, and the abdomen side portion 21 of the exterior body continuous member 11S and the back side portion 23 of the exterior body continuous member 11S are opposed to the second sheet material 2S inside. And overlap. Then, the side seal process which joins the abdominal part 21 and the back side part 23 in the width direction at predetermined intervals is performed. The predetermined interval in the side seal process determines the length of the pants-type diaper 10 in the width direction. In this way, a continuous pants-type diaper 10S is obtained.

  Subsequently, the pants-type diaper continuum 10S is cut in the width direction at the joint obtained by performing the side seal. As a result, the pant-type diaper 10 (10A) is completed, and the configuration described in the first example of the pant-type diaper can be obtained.

In the first embodiment of the manufacturing method described above, the inner layer material is obtained by laminating the plurality of tape-like sheet materials 33T formed by slitting the first sheet material 1S with the second sheet material 2S in a state of being separated from each other. A one-layer region consisting of 31 is formed. Thereby, since air permeability is remarkably improved in a 1 layer area | region, the underpants type diaper 10 (10A) which reduced drastically can be provided.
Moreover, since the usage-amount of the outer-layer material 33 can be reduced, in a disposable type underpants type diaper, what is called an environmentally friendly resource-saving product can be manufactured. Furthermore, since the usage amount of the outer layer material 33 can be reduced, the product cost can be reduced.

  Next, a second embodiment of the manufacturing method of the present invention will be described below with reference to (1) a plan view and (2) a front view showing the main part of FIG. A 2nd embodiment is one method of manufacturing the above-mentioned underpants type diaper 10 (10B).

  As shown in FIG. 12, for example, the first sheet material 1S is supplied from the upper side, the second sheet material 2S is supplied from the lower side, and further, between the first sheet material 1S and the second sheet material 2S. The elastic body continuous member 3 </ b> S that becomes the elastic body 35 is supplied. The first sheet material 1 </ b> S forms the outer layer material 33, and the second sheet material 2 </ b> S forms the inner layer material 31. The first sheet material 1S (outer layer material 33), the second sheet material 2S (inner layer material 31), and the elastic body continuous member 3S (elastic body 35) are made of the same material as the above-described pants-type diaper 10.

  First, the outer layer material slit cutter 211 is used to form the tape-like sheet material 33T having a narrow width by dividing the first sheet material 1S into a plurality of pieces in the width direction, as described in the first embodiment. Similar spacing means 213 separates the tape-like sheet materials 33T and 33T at a predetermined distance d1. The width of the tape-shaped sheet material 33T (the divided first sheet material 1S) is the same as the width of the outer layer material 33 of the pant-type diaper 10A described above, and the interval thereof is also the interval of the outer layer material 33 of the pant-type diaper 10A described above. It is the same.

In addition, a plurality of elastic bodies 35 are prepared in parallel, and each of the second sheets is in a state where each of the elastic bodies 35 is extended and an adhesive (not shown) supplied by the adhesive coating device 215 is attached. Supply with material 2S. Each elastic body continuous member 3S is supplied at a predetermined interval d2. This adhesive is supplied intermittently. For example, as shown in FIG. 5, the outer edge portion of the absorbent main body 40 attached to the abdominal side portion 21 and the back side portion 23 of the exterior body 11 formed of the second sheet material 2S, the waist of the abdominal side portion 21. Adhesive is applied to the elastic continuous member 3S (elastic body 35) disposed at the respective positions of both ends in the circumferential direction and both ends of the back side portion 23 in the circumferential direction of the waist. At this time, it supplies so that the center of the width direction of the elastic body continuous member 3S may correspond with the center of the width direction of the tape-shaped sheet material 33T.
For example, a hot melt gun is used for the adhesive coating device 215, and a hot melt adhesive is used as the adhesive in this case.

In this way, the second sheet material 2S, the elastic body continuous member 3S, and the tape-shaped sheet material 33T are passed between the nip rolls 217 and 218. Then, the second sheet material 2S and the tape-shaped sheet material 33T are partially bonded via the elastic body continuous member 3S by the hot melt adhesive applied to the elastic body continuous member 3S by the pressure between the rolls.
The width | variety of the said tape-shaped sheet material 33T and the space | interval of the tape-shaped sheet material 33T are based on 10 A of underpants type diapers mentioned above.

Next, a sealing process is performed in which the first sheet material 1S, the elastic continuous member 3S, and the second sheet material 2S that are partially bonded are passed through the seal roll 231 in a state where they are overlapped. By this seal roll 231, seal portions 37 are formed at intervals on both sides in the width direction of the tape-like sheet material 33 T, and the tape-like sheet material 33 T is fixed to the second sheet material 2 S. For forming the seal portion 37, it is preferable to use emboss bonding. By adopting emboss bonding, the texture of the sheet material is not impaired by the curing of the adhesive and the like, and a good touch can be maintained.
The elastic continuous member 3S is located between the tape-like sheet material 33T and the second sheet material 2S, and between the seal portions 37, 37, and is intermittently tape-like sheet material by an adhesive in the above-described process. 33T is fixed to the second sheet material 2S. Therefore, the elastic continuous member 3S is largely free from the tape-like sheet material 33T and the second sheet material 2S. Thereby, the air permeability in the width direction of the tape-shaped sheet material 33T (outer layer material 33) can be improved.

Further, in the sealing step, the sealing member 37 is regularly formed in the nonwoven fabric portion in which the tape-like sheet material 33T and the second sheet material 2S are in two layers, with the stretched elastic body continuous member 3S interposed therebetween, When the elastic body continuous member (elastic body 35) contracts, a ridge (not shown) can be formed by the tape-like sheet material 33T (outer layer material 33). That is, the tape-like sheet material 33T while being intermittently fixed by contracting the elastic body made of the elastic continuous member 3S rises outward (non-skin contact surface side). As a result, the wrinkles are formed.
In this way, an exterior body continuous member 11S that becomes the exterior body 11 is obtained.

  Next, the process after the elastic body cutting | disconnection process using the cut roll 219 demonstrated in the above-mentioned 1st embodiment is performed sequentially, and the underpants type diaper 10 (10B) (for example, refer said FIG. 5) is completed. In this embodiment, the elastic body cutting step cuts the elastic body 35 at one position in the center of the region where the absorber is disposed. Alternatively, since the elastic body cutting step is not essential, the elastic body 35 may not be cut.

In the second embodiment of the manufacturing method of the present invention, the same effects as those of the first embodiment described above can be obtained, and the air permeability of the region where the tape-shaped sheet material 33T (outer layer material 33) is formed can be improved. Can do. Further, it is possible to form a ridge in the width direction of the outer layer material 33 simultaneously with fixing the tape-like sheet material 33T. This can give a decorative aesthetic.
Further, in the fixation between the elastic continuous member and the first sheet material 1S or the second sheet material 2S, and the fixation between the first sheet material 1S and the second sheet material 2S, more adhesion than in the first embodiment. An agent is not required, and environmental burdens can be reduced, and costs are reduced.

  Next, a third embodiment of the manufacturing method of the present invention will be described below with reference to (1) a plan view and (2) a front view showing the main part of FIG. A 3rd embodiment is one method of manufacturing the above-mentioned underpants type diaper 10 (10C).

  As shown in FIG. 13, the first sheet material 1S is supplied from the upper side, and the second sheet material 2S is supplied from the lower side. The first sheet material 1S forms the outer layer material 33, and itself has elasticity in the longitudinal direction (waist circumference direction). As an example, it has a fiber layer on the surface of an elastic sheet. Therefore, unlike the above-described first embodiment, the elastic body 35 is not used. The second sheet material 2 </ b> S forms the inner layer material 31.

  First, with the uneven roll 241, a tooth gap process as a stretching process is performed on the entire surface of the first sheet material 1 </ b> S. As a result, a groove 34 (not shown after slitting the first sheet material 1S) is provided in the width direction of the first sheet material 1S. By this tooth gap processing, the first sheet material 1S is made stretchable by imparting extensibility to the fiber layer without inhibiting the stretchability of the stretchable sheet in the longitudinal direction of the first sheet material 1S. The interval between the grooves 34 depends on the thickness of the nonwoven fabric of the first sheet material 1S, but for example, is an interval according to the above-described pants-type diaper 10C. Further, an uneven roll 242 that meshes with the roll 241 is disposed at a position facing the uneven roll 241.

  Next, the outer layer material slit cutter 211 divides the first sheet material 1S subjected to the above-mentioned tooth groove processing into a plurality of pieces to obtain a tape-shaped sheet material 33T. Further, the tape-like sheet materials 33T and 33T are separated by a predetermined distance d1 by the separation means 213 similar to that described in the first embodiment. The width | variety of the tape-shaped sheet material 33T and the space | interval of tape-shaped sheet material 33T are based on 10 A of underpants type diapers mentioned above. In addition, after dividing the 1st sheet material 1S into multiple pieces with the outer-layer material slit cutter 211, you may give the above-mentioned tooth gap process.

  On the other hand, the second sheet material 2S is supplied in a state where an adhesive (not shown) supplied by the adhesive coating device 215 is attached. The adhesive is preferably supplied to substantially the center of the position where each of the tape-like sheet materials 33T is bonded in the next step, and the supply method may be continuous or intermittent.

In this manner, the tape-shaped sheet material 33T is supplied between the nip rolls 217 and 218 at a predetermined interval on the second sheet material 2S. Then, by passing the second sheet material 2S and the tape-shaped sheet material 33T between the nip rolls 217 and 218, the second sheet material 2S and the tape-shaped material are adhered to the second sheet material 2S by the pressure between the rolls. The sheet material 33T is bonded.
As a result, an exterior body continuous member 11S to be the exterior body 11 is obtained.

  Next, the steps after the exterior body cutting step using the exterior body slit cutter 221 described in the first embodiment of the manufacturing method of the present invention are sequentially performed, and the pants-type diaper 10 (10C) (for example, FIG. Complete 6).

  In the third embodiment of the manufacturing method of the present invention, the same effect as in the first embodiment described above can be obtained. At the same time, since elasticity is imparted to the tape-shaped sheet material 33T itself, it is necessary to arrange an elastic body between the first sheet material 1S (outer layer material 33) and the second sheet material 2S (inner layer material 31). Therefore, it is possible to reduce the material and the material cost accordingly.

  Next, the 4th embodiment of the manufacturing method of this invention is demonstrated below with reference to the (1) top view and (2) front view which showed the principal part of FIG. A 4th embodiment is one method of manufacturing the above-mentioned underpants type diaper 10 (10D).

  In the fourth embodiment, the second sheet material 2S that becomes the inner layer material 31 and the tape-like sheet material 33T that becomes the outer layer material 33 (the first sheet material 1S) by the nip rolls 217 and 218 in the first embodiment described above. ) Are bonded through the elastic body continuous member 3S and the elastic body cutting process by the cut roll 219 is performed in the tooth gap process as an extending process. Except for performing the tooth gap process, it is the same as the first embodiment described above. Here, the tooth gap process is performed by pressing the blades of the concavo-convex roll 241 against the tape-like sheet material 33T and the inner layer material 31, for example, extending into the fiber layer without hindering the extensibility of the extension sheet constituting the outer layer material 33. This is a process of imparting sex. As a result, for example, the grooves 34 are provided at intervals in the tape-like sheet material 33T. The interval between the grooves 34 is preferably the same as, for example, the groove of the above-described pants-type diaper 10C. An uneven roll 242 that meshes with the roll 241 is disposed at a position facing the uneven roll 241.

  First, in the same manner as in the first embodiment described above, a tape-like sheet material 33T having a narrow width obtained by dividing the first sheet material 1S into a plurality of pieces is bonded to the second sheet material 2S (inner layer material 31). This tape-shaped sheet material 33T is a non-stretchable nonwoven fabric as an example. Subsequently, the concave-convex roll 241 performs tooth gap processing as stretching processing on the tape-like sheet material 33T and the inner layer material 31 bonded together with the elastic body continuous member 3S interposed therebetween. Thereby, in the tape-like sheet material 33T and the inner layer material 31, extensibility is expressed in the longitudinal direction so as not to hinder the stretchability of the elastic continuous member 3S. In addition, there is no influence on the stretchability of the elastic body continuous member 3S by tooth gap processing. As a result of performing this tooth groove processing, the surface of the tape-shaped sheet material 33T is provided with irregularities (the recesses are grooves 34) in the width direction. The interval between the grooves 34 depends on the thickness of the nonwoven fabric of the first sheet material 1S, but for example, is an interval according to the above-described pants-type diaper 10C. In addition, if the said extending | stretching process is a method which makes the tape-shaped sheet material 33T and the inner-layer material 31 extendable, a processing method will not be limited to a tooth gap process.

  In the above-described fourth embodiment, the same effect as in the above-described first embodiment can be obtained. At the same time, the tape-like sheet material 33T (outer layer material 33) and the inner layer material 31 exhibit extensibility, so that stretchability can be imparted in the waist circumference direction of the outer body 11 of the pant-type diaper (see FIG. 7). it can. Moreover, it becomes easy to form a wrinkle by forming the groove | channel 34 in the tape-shaped sheet material 33T.

  Next, a fifth embodiment of the manufacturing method will be described below with reference to the schematic perspective view of FIG. A 5th embodiment is another manufacturing method which manufactures the above-mentioned underpants type diaper 10 (10A).

As shown in FIG. 15, in the fifth embodiment, the first sheet material 1 </ b> S, the first sheet material 1 </ b> SA that forms the ventral side portion 21 of the exterior body 11, and the first side portion that forms the back side portion 23 in advance. The sheet material 1SB is supplied separately. Similarly, the second sheet material 2 </ b> S is supplied in a state of being divided into a second sheet material 2 </ b> SA that forms the ventral side portion 21 and a second sheet material 2 </ b> SB that forms the back side portion 23. Then, the first sheet materials 1SA and S1B are respectively divided into a plurality of pieces by the outer layer material slit cutter 211 to obtain tape-like sheet materials 33TA and 33TB. Further, the separating means 213 separates the tape-like sheet materials 33TA and 33TA and the tape-like sheet materials 33TB and 33TB at predetermined intervals. The widths of the tape-like sheet materials 33TA and 33TB (the divided first sheet materials 1SA and 1SB) are the same as the width of the outer layer material 33 of the above-described pant-type diaper 10A, and the interval is also the outer layer of the above-described pant-type diaper 10A. This is the same as the interval of the material 33.
Subsequent processes are the same as those in the first embodiment described above, except that the cutting process of the exterior body continuous member 11S using the exterior body slit cutter is not performed.

  In the fifth embodiment, the same effect as in the first embodiment described above can be obtained. At the same time, the first sheet material 1S is supplied in a state of being divided into the first sheet materials 1SA and 1SB, and the second sheet material 2S is supplied in a state of being divided into the second sheet materials 2SA and 2SB. There is no need to install a body slit cutter. Therefore, manufacturing equipment can be reduced and manufacturing cost can be reduced.

  As in the fifth embodiment of the manufacturing method, the method of supplying the first sheet material 1SA and the first sheet material 1SB separately is applied to the second to fourth embodiments described above. can do. In any case, the subsequent steps are the same as those in the second to fourth embodiments, respectively, except that the cutting process of the exterior body continuous member 11S using the exterior body slit cutter is not performed.

  Next, with reference to the schematic perspective view of FIG. 16, it demonstrates below about preferable one Embodiment (2nd Embodiment) of the manufacturing method of the underpants type diaper which concerns on this invention. 2nd Embodiment is an example which applied the manufacturing method of this invention to the manufacturing method of the underpants type diaper which has the conventional leg hole, and is the method of manufacturing the above-mentioned underpants type diaper 100. FIG.

  As shown in FIG. 16, the first sheet material 1S is supplied from the upper side, the second sheet material 2S is supplied from the lower side, and the elastic body 35 is provided between the first sheet material 1S and the second sheet material 2S. The elastic continuous member 3S is supplied at the same time. The first sheet material 1 </ b> S forms the outer layer material 33, and the second sheet material 2 </ b> S forms the inner layer material 31. The first sheet material 1S (outer layer material 33), the second sheet material 2S (inner layer material 31), and the elastic body continuous member 3S (elastic body 35) have been described in the first embodiment of the pant-type diaper described above. Use the same material as

  First, the first sheet material 1S is divided into a plurality of pieces by the outer layer material slit cutter 211 to form the tape-shaped sheet material 33T. Next, the tape-like sheet materials 33T and 33T are separated at a predetermined interval by a separation means (not shown) similar to that described in the first embodiment of the first embodiment. The tape-like sheet material 33T (the divided first sheet material 1S) is formed to have the same width as that of the outer layer material 33 of the above-described pant-type diaper 10A, and the spacing when spaced apart is also the above-described pant-type diaper 10A. The outer layer material 33 is formed at the same interval.

  Also, an adhesive application device (not shown) similar to that described in the first embodiment is prepared in a state where a plurality of elastic body continuous members 3S are prepared in parallel, and each is extended. In the state where the adhesive (not shown) supplied by is attached, the sheet is supplied between the second sheet material 2S and the tape-like sheet material 33T separated from each other. At this time, it is preferable to supply the tape-shaped sheet material 33T and the elastic body continuous member 3S so that the center in the width direction of the elastic body continuous member 3S coincides with the center in the width direction of the tape-shaped sheet material 33T. For example, a hot melt gun is used for the adhesive coating apparatus (not shown), and a hot melt adhesive is used for the adhesive in this case.

  In this way, the second sheet material 2S, the elastic body continuous member 3S, and the tape-shaped sheet material 33T are passed between the nip rolls 217 and 218. And by the pressure between rolls, the 2nd sheet material 2S and the tape-shaped sheet material 33T are adhere | attached via the elastic body continuous member 3S with the hot-melt-adhesive agent with which the elastic body continuous member 3S was attached, and the exterior body 11 An exterior body continuous member 11S is obtained.

  Then, the elastic body cutting process which does not express the elastic function of the elastic body continuous member 3S in the area | region where the absorptive main body 40 is attached by a subsequent process with the cut roll 219 is performed. This cutting method is the same as that described in the first embodiment.

  Next, in the same manner as in the first embodiment described above, the absorbent main body 40 obtained by cutting the absorbent main body continuous body 40S supplied from the absorbent main body forming portion 4 is used as the ventral side of the exterior body continuous member 11S. It arrange | positions in the predetermined position of the part 21 and the back side part 23. FIG. Subsequently, both ends in the width direction of the exterior body continuous member 11S are folded back so as to cover both ends in the longitudinal direction of the absorbent main body 40, and the absorbent main body 40 is fixed at the folded portions.

  Next, leg holes 110 are opened in both side portions of the absorbent main body 40 fixed to the exterior body continuous member 11S.

  Next, the longitudinal direction of the absorbent main body 40 is folded in half, and the abdomen side portion 21 of the exterior body continuous member 11S and the back side portion 23 of the exterior body continuous member 11S are opposed to the second sheet material 2S inside. The pants-type diaper 100 is completed by performing the steps after the side sealing step of joining the abdominal side portion 21 and the back side portion 23 in the width direction at a predetermined interval.

In the manufacturing method of the above-described second embodiment, the air permeability in the one-layer region is formed by forming a one-layer region made of the inner layer material 31 on a part of the outer package 11 as in the first embodiment. Therefore, the pants-type diaper 100 can be provided with greatly reduced stuffiness.
Moreover, since the usage-amount of the outer-layer material 33 can be reduced, what is called an environmentally friendly product can be manufactured in a disposable type pants-type diaper. Moreover, since the usage-amount of the outer layer material 33 can be reduced, the product cost can be reduced.

  As described above, according to the pant-type wearing article and the manufacturing method thereof of the present invention, the outer layer material is arranged at intervals in the height direction so that the inner layer material 31 without the outer layer material 33 is a single layer region. By forming, the breathability of the pants-type wearing articles 10 and 100 can be remarkably improved.

In each of the above embodiments, a pant-type diaper is shown as an example of the pant-type wearing article of the present invention. However, a pant-type diaper cover that is used with an absorbent main body disposed on the skin surface side is also preferable. The absorbent main body is not particularly limited as long as it absorbs excreted urine and the like, and examples thereof include an absorbent pad such as a urine collecting pad. The absorbent pad includes, for example, a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent interposed between the two sheets, and is formed in a vertically long shape such as a rectangular shape in plan view. The thing which was done is mentioned. Preferably, a pair of left and right solid guards are formed on both sides of the absorbent pad in the longitudinal direction, and each solid guard is for forming a solid guard having a solid guard elastic member on both sides of the absorbent pad in the longitudinal direction. It is preferable that the sheet material is disposed. The longitudinal direction of such an absorbent pad is passed from the wearer's back side to the stomach side through the crotch, and the liquid-permeable sheet side of the pad is disposed so as to contact the wearer's skin. It is preferable to wear the diaper cover so as to cover the absorbent pad.
Further, the pant-type wearing article of the present invention is a concept that includes absorbent articles in general having a pant-type structure, such as a sanitary short and a shorts napkin, in addition to the pant-type diaper as described above. This pants-type wearing article may be for infants or for adults.

10 Pants-type wearing articles (pants-type diapers)
DESCRIPTION OF SYMBOLS 11 Exterior body 13 Crotch part 21 Abdominal side part 21A, 21B Side edge part 23 Back side part 23A, 23B Side edge part 31 Inner layer material 33 Outer layer material 1S 1st sheet material 2S 2nd sheet material 33T Tape-like sheet material

Claims (10)

The abdomen side part arranged on the abdomen side of the wearer, the crotch part arranged in the crotch part, and the back side part arranged on the back side, the side edge part of the abdomen side part and the back side part It is a pants-type wearing article that is formed into a pants-type bonded to the side edge,
The ventral side portion and the back side portion are composed of an exterior body in which an inner layer material and an outer layer material are laminated,
The exterior body has a plurality of one-layer regions made of the inner layer material or the outer layer material at intervals in the height direction of the exterior body,
The layered region in which the inner layer material and the outer layer material are stacked is a pants-type wearing article that is stretchable in a waist circumference direction of the exterior body. The pants-type wearing article according to claim 1, wherein an inner layer material is present in the one-layer region, and the outer layer material is laminated on the inner layer material at an interval in a height direction of the exterior body . The said lamination | stacking area | region comprises the elastic body between the said inner layer material and the said outer layer material, or both the inner layer material and the outer layer material are formed with the material which has a stretching property. Item 3. A pants-type wearing article according to Item 2 . The underpants-type wearing article according to any one of claims 1 to 3, wherein the exterior body is stretched . 5. The outer layer material of the laminated region is fixed to the inner layer material at a central portion in the width direction thereof, and a frill is formed at an edge of the outer layer material that becomes a free end. The pants-type wearing article according to item 1 . A method for manufacturing a pants-type wearing article,
Forming a plurality of tape-shaped sheet materials by slitting a plurality of first sheet materials constituting the exterior body in the width direction;
In a state where the plurality of tape-shaped sheet materials are separated from each other, the step of laminating and fixing the second sheet material, and obtaining an exterior body;
Superposing the exterior body with the second sheet material facing inward, and joining at a predetermined interval in the width direction of the exterior body;
Cutting the exterior body in the width direction at the joint; and
A method for manufacturing a pants-type wearing article. The method for manufacturing a pants-type wearing article according to claim 6, wherein the plurality of tape-shaped sheet materials are separated in the width direction by a separation means. The method for manufacturing a pants-type wearing article according to claim 6 or 7, wherein an elastic body is interposed between the first sheet material and the second sheet material. The first sheet and the second sheet in a region where the elastic body does not exist are embossed and joined together in a state where the elastic body is interposed between the first sheet material and the second sheet material. Item 9. A method for manufacturing a pants-type wearing article according to Item 6. Before laminating the first sheet material and the second sheet material, either or both of the first sheet material and the second sheet material, or the first sheet material and the second sheet material. The method for producing a pants-type wearing article according to any one of claims 6 to 9, wherein a stretching process is performed after the laminated state.