JP2011115307A - Method for manufacturing wearing article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a wearing article which is capable of stably and continuously manufacturing the wearing article enhanced in finish precision even if a stretchable sheet is used. <P>SOLUTION: The method manufactures a wearing article having the leg parts positioned around the legs of a wearer when wearing the wearing article, and the method includes a leg part forming step for joining and integrating first and second sheets 120 and 130 to obtain a composite sheet 110 and forming the leg parts (leg holes 112) in the composite sheet 110, and a stretching step for making the composite sheet 110 having the leg holes 112 formed therein undergo stretching processing to apply stretchability to the composite sheet 110. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a worn article having a leg portion located around a wearer's leg when worn, such as a disposable diaper.

  Disposable diapers, which are a type of worn article, may loosen or slip off from the wearer's body due to the wearer's exercise, etc. Elastic stretchability is imparted to the peripheral edge of the. Moreover, in addition to these peripheral parts, the underpants type disposable diaper by which elastic elasticity was provided also to the waist part located below the peripheral part of a waist part is known. When giving elastic stretchability to a disposable diaper, a stretched thread-like or belt-like elastic member is fixed between two substantially non-stretchable sheets via an adhesive, and the elastic member is contracted. A method of forming a gather is generally used.

  Moreover, the elastic sheet obtained by the method which does not form the said gathers is known as a material used for a wearing article. For example, in Patent Documents 1 to 3, a processing apparatus including a pair of rolls having tooth grooves engaged with each other on the peripheral surface portion is used, and the roll is rotated to supply a sheet of nonwoven fabric or the like to the meshed portion, It describes that the sheet is stretched. After the stretching process, the sheet exhibits elasticity, and the sheet becomes an elastic sheet.

  However, when manufacturing an absorbent article using such a stretchable sheet (a sheet that develops stretchability by stretching), there is a problem that the finished dimensions are not stable due to tension fluctuations during sheet conveyance. Therefore, in Patent Document 4, a stretchable stretchable sheet and a non-stretchable sheet are joined and transported to prevent the influence of fluctuations in tension during sheet transport, and a disposable diaper with high finishing accuracy is obtained. We have proposed a manufacturing method that enables stable and continuous production.

JP 2007-177384 A JP 2008-156785 A JP 2008-253679 A JP 2007-105453 A

  When manufacturing an absorbent article using a stretchable sheet, as described in Patent Document 4, by joining and transporting a stretchable sheet and a non-stretchable sheet, finished dimensional accuracy and overall Although the strength is improved to some extent, the present situation is that there is a demand for even higher accuracy with respect to the formation position and finished dimensions of the leg portions (leg holes) with respect to the stretchable sheet.

  Therefore, the subject of this invention is providing the manufacturing method of the wearing article which can manufacture a wearing article with high finishing precision stably continuously even if it uses an elastic sheet.

  The present invention is a method for manufacturing a worn article having a leg portion positioned around a wearer's leg when worn, wherein a composite sheet is obtained by joining and integrating a first sheet and a second sheet. A method for manufacturing a worn article, comprising: a leg part forming step for forming the leg part; and a stretching process for imparting stretchability to the composite sheet by subjecting the composite sheet on which the leg part is formed to a stretching process. By providing, the above-mentioned problems are solved.

  According to the method for manufacturing a wearing article of the present invention, even if an elastic sheet is used, its conveyance stability is high, and the wearing article including the elastic sheet as a constituent member and having high finishing accuracy is stably and continuously manufactured. can do. Moreover, the wearing article provided by the present invention is excellent in flexibility and stretchability, and has a wide size application range.

FIG. 1 is a perspective view showing an embodiment of a pants-type disposable diaper as an example of a wearing article manufactured by the manufacturing method of the present invention. FIG. 2 is a plan view on the skin contact surface side (surface sheet side) showing a developed state in which the diaper shown in FIG. FIG. 3 is an exploded perspective view of the diaper shown in FIG. 4 is a cross-sectional view schematically showing a cross section taken along line II-II in FIG. FIG. 5 is a schematic perspective view showing an outline of a manufacturing process of the diaper shown in FIG. FIG. 6 is a schematic diagram illustrating a state in which the composite sheet is stretched by the tooth gap roll in the stretching step illustrated in FIG. 5. FIG. 7 is a view corresponding to FIG. 5 showing another embodiment (second embodiment) of the production method of the present invention. FIG. 8 is a view corresponding to FIG. 5 showing another embodiment (third embodiment) of the production method of the present invention. FIG. 9 is a view corresponding to FIG. 5 showing another embodiment (fourth embodiment) of the production method of the present invention. FIG. 10 is a view corresponding to FIG. 5 showing another embodiment (fifth embodiment) of the production method of the present invention.

  Hereinafter, a method for manufacturing a worn article according to the present invention (hereinafter, also simply referred to as a manufacturing method) will be described based on preferred embodiments with reference to the drawings. First, the wearing article manufactured by the manufacturing method of the 1st embodiment of the present invention is explained. In a 1st embodiment, the underpants type disposable diaper 1 shown in FIGS. 1-4 is manufactured as a wearing article. The diaper 1 has a leg part (peripheral part 60 of the leg opening 6) located around the wearer's leg when worn.

  As shown in FIGS. 2 and 3, the diaper 1 is interposed between a liquid-permeable top sheet 2, a liquid-impermeable or liquid-permeable (water-repellent) back sheet 3, and both sheets 2 and 3. An absorbent main body 10 having a liquid-retaining absorbent core 4 disposed, and an exterior disposed on the non-skin contact surface side (back surface sheet 3 side) of the absorbent main body 10 and fixing the absorbent main body 10 And a body 11. As shown in FIG. 2, the absorbent main body 10 has a shape (rectangular shape) that is long in one direction in plan view.

  As shown in FIG. 2, the diaper 1 includes an abdominal side A disposed on the abdomen side of the wearer when worn, a back side B disposed on the back side, and an abdominal side A and a back side B. Crotch part C located between the two. The exterior body 11 defines the outline of the diaper, and in an unfolded state, both side edges along the longitudinal direction have an hourglass shape that is inwardly bound in the central portion in the longitudinal direction. In the exterior body 11, both side edges A1, A2 on the ventral side A and both side edges B1, B2 on the back side B are joined to each other, and as a result of the joining, as shown in FIG. A pair of side seal portions S, S, a waist opening 5 and a pair of leg openings 6, 6 are formed.

  In addition, in this specification, a skin contact surface is a surface turned to a wearer's skin side at the time of wear in a wear article and its component, and a non-skin contact surface is at the time of wear in a wear article and its component. It is a surface directed to the side opposite to the wearer's skin side. Further, the longitudinal direction is a direction along the long side of the wearing article or the constituent member of the wearing article, and the width direction is a direction orthogonal to the longitudinal direction. In the case of a pant-type wearing article such as diaper 1, when the pant-type wearing article is unfolded as shown in FIG. 2, the direction along the long side (vertical direction in FIG. 2) is the length of the pant-type wearing article. 2 is the width direction of the pants-type wearing article.

  The absorbent main body 10 is formed by integrating the top sheet 2, the back sheet 3, and the absorbent core 4. As the top sheet 2, the back sheet 3, and the absorbent core 4, various types conventionally used for this type of article can be used without particular limitation. For example, various nonwoven fabrics or apertured films can be used as the top sheet, and a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used as the back sheet. The resin film used for the back sheet preferably has air permeability. As the absorbent core 4, a fiber material such as pulp is preferably provided with particles of a superabsorbent polymer, and these constituent materials are covered with a sheet (not shown) such as tissue paper or nonwoven fabric. Can be used.

  As shown in FIG. 2, side cuffs 8 and 8 made of a liquid-resistant or water-repellent and breathable material are formed on the left and right sides of the absorbent main body 10 in the longitudinal direction. In the vicinity of the free end of each side cuff 8, one or more side cuff elastic members 81 are arranged in an expanded state. The side cuff 8 stands up when the diaper is worn to prevent the liquid from flowing out. In FIG. 3, a sheet material for forming the side cuffs 8 and 8 is indicated by reference numeral 82. The portions 82 </ b> S that extend outward from both side edges of the absorbent core 4 in the sheet material 82 are fixed between the absorbent core 4 and the backsheet 3 or between the backsheet 3 and the inner layer sheet 13. Yes.

  As shown in FIGS. 3 and 4, the exterior body 11 includes at least two sheets, that is, an outer layer sheet 12 and an inner layer sheet 13 disposed on the inner surface (skin contact surface) side of the outer layer sheet 12. Have a structure. The outer layer sheet 12 forms the outer surface (non-skin contact surface) of the diaper 1, and the inner layer sheet 13 is disposed on the inner surface side of the outer layer sheet 12 and is partially joined thereto.

  In the diaper 1, as shown in FIG.3 and FIG.4, in each of the abdominal part A and the back part B, between the said 2 sheets | sheets 12 and 13 is in side seal part A1, A2, B1, B2. Are bonded to each other by heat sealing, high frequency sealing or ultrasonic sealing, and an adhesive such as a hot-melt adhesive is used at the peripheral edge 50 of the waist opening 5 and the peripheral edge 60 of each of the pair of leg openings 6. 52 and 62 are joined together.

  Further, between the two sheets 12 and 13 on the abdominal side A and the back side B, respectively, the joint portions (side seal portions A1, A2, B1, B2 and the waist opening portion 5 of the waist opening 5 are formed by the adhesives 52, 62. Except for the peripheral edge portion 50 and the peripheral edge portions 60 of each of the pair of leg openings 6, it is preferable that the regions to be described later (stretched portion P <b> 1) are not joined to each other. The diaper 1 adopts this preferable joining form. Specifically, between the two sheets 12 and 13, the side seal portions A 1, A 2, B 1 and B 2, and the peripheral portion 50 of the waist opening 5. In addition to the peripheral edge portion 60 of each of the pair of leg openings 6, the adhesive 14 in the diaper width direction center portion (width direction center portion of the corresponding portion of the absorbent core 4) of each of the ventral side portion A and the back side portion B It is joined by, and it is not joined in other parts.

  In addition, when only one of the two sheets 12 and 13 constituting the exterior body 11 has stretchability (when stretchability is imparted to only one sheet by stretching), Between the two sheets 12 and 13 in each of the ventral portion A and the back portion B, the side seal portions A1, A2, B1, and B2, the peripheral edge portion 50 of the waist opening portion 5, and the pair of leg opening portions 6 are respectively provided. It is preferable that most of the parts other than the peripheral part 60 are not joined. On the other hand, when both of the two sheets 12 and 13 are stretchable (when stretchability is imparted to both sheets by stretching), the bonding between the sheets 12 and 13 is performed. Since the resulting degree of hindrance to stretchability is small, the joining position between the two sheets 12 and 13 can be arbitrarily set.

  One or a plurality of waist elastic members 51 are disposed on the peripheral edge 50 of the waist opening 5 in each of the ventral side A and the back side B along the peripheral edge of the opening of the waist opening 5. ing. The waist elastic member 51 is fixed in an extended state between the two sheets 12 and 13 via an adhesive 52. Further, the peripheral edge 60 of each of the pair of leg openings 6, 6 existing over the abdominal part A, the crotch C, and the back part B is also 1 along the opening peripheral edge of the leg opening 6. One or a plurality of leg elastic members 61 (61a, 61b) are arranged. These leg elastic members 61 a and 61 b are fixed in an extended state between the two sheets 12 and 13 via an adhesive 62. As the waist elastic member 51 and the leg elastic member 61, elastic materials such as natural rubber, polyurethane resin, foamed urethane resin, and hot melt elastic member are made into a thread (thread rubber) or a belt (flat rubber), respectively. Those formed in the above are preferably used.

  The width | variety of the area | region where the sheet | seats 12 and 13 which exist in the peripheral part 50 of the waist opening part 5 are joined is the edge part 5a of the waist opening part 5a about each of the ventral part A and the back part B. It is preferably within 5 to 50 mm, more preferably within 30 mm. In addition, the width of the region where the two sheets 12, 13 existing in the peripheral edge portion 60 of the leg opening 6 are joined to each other is such that the leg opening portion in the abdominal part A, the crotch part C, and the dorsal part B It is preferably within 50 mm from the peripheral edge of 6, and more preferably within 30 mm.

  In addition, in the diaper width direction in each of the ventral side A and the back side B, the total length of the portions where the two sheets 12 and 13 are not joined (L1 + L2, see FIG. 3) is the left and right side seal portions. The length La (Lb) between A1 and A2 is preferably 60% or more, more preferably 70% or more, and still more preferably 80% or more. Moreover, the area of the part which is not joined between the two sheets 12 and 13 in each of the ventral part A and the dorsal part B is 60 to 100 with respect to the areas of the ventral part A and the dorsal part B, respectively. %, And more preferably 70 to 100%. Those satisfying this numerical value shall be referred to as “the entire region or most of them are not joined”. Unless otherwise specified, the dimensions, ratios, and the like of each part described in the present specification are in a natural state in which the diaper is in an unfolded state as shown in FIG. 2 and the contraction force by the elastic members of the waist opening and the leg opening is released ( The value measured in a state where an external force such as a tensile force is not applied) or based on the value.

  In the diaper 1, the two sheets 12 and 13 in the crotch part C are also joined via the adhesives 62 and 14 at the peripheral edge 60 of the leg opening 6 and the central part of the crotch part C in the diaper width direction. However, other parts are not joined. In the diaper 1, as shown in FIG. 2, the leg elastic member 61 for imparting stretchability to the peripheral edge 60 of the leg opening 6 includes a diaper width of the crotch C from the peripheral edge 60 of the leg opening 6. In this way, the portion where the leg elastic member 61 for providing the leg opening 6 with elasticity in the circumferential direction is arranged at the periphery of the leg opening 6. 60.

  In the diaper 1, as shown in FIG. 3, the outer layer sheet 12 has a length that extends further outward in the diaper longitudinal direction than a portion where the waist elastic member 51 is sandwiched and fixed by the two sheets 12 and 13. The portions 12a and 12b that extend from the inner layer sheet 13 are folded back toward the absorbent main body 10 side. As for the absorptive main body 10, the skin contact surface side in the longitudinal direction both ends is covered with the folded parts 12a and 12b of the outer layer sheet 12, and the covered part is the folded part of the outer layer sheet 12. It is bonded to 12a and 12b via an adhesive. Thereby, the both ends of the longitudinal direction of the absorptive main body 10 are coat | covered with the exterior body 11, and are being fixed reliably.

  As shown in FIG. 3, the absorbent main body 10 is bonded to the exterior body 11 via an adhesive 15 only at the center in the width direction at portions other than both ends in the longitudinal direction. Since the expansion and contraction of the exterior body 11 is less likely to be hindered by the joining of the absorbent main body 10, a good fit can be obtained at the waistline portion. The width W1 (see FIG. 4) of the region where the absorbent main body 10 and the exterior body 11 are bonded is 20 to 80% of the width W of the absorbent main body 10 in each of the ventral side A and the back side B. It is preferable that there is more preferably 30 to 70%.

  As will be described later, the diaper 1 is partially stretched on the exterior body 11, and as shown in FIG. 2, the stretched part (the part with hatched lines in FIG. 2). , Also referred to as a stretched portion). The stretched part P1 passes through both side edges 10s, 10s along the longitudinal direction of the absorbent main body 10 and extends in the longitudinal direction of the diaper 1 in the width direction outside the two virtual straight lines (not shown). It is formed in the direction and is not formed in the arrangement region of the absorbent main body 10 and the region located in the longitudinal direction of the diaper 1 across the arrangement region. The stretched portion P1 is preferably formed at least on the ventral side A and the dorsal side B, and in the stretching step in the manufacturing method of the present invention described later, a composite of the ventral side A and the dorsal side B. It is preferable to stretch the sheet 110 (see FIG. 5).

  The stretched portion P1 expands and contracts in the width direction of the diaper 1 (the left-right direction in FIG. 2) on the sheet (composite sheet composed of the outer layer sheet 12 and the inner layer sheet 13) constituting the exterior body 11 by a stretching process described later. Sex has been granted. More specifically, in the diaper 1, stretchability in the width direction of the diaper 1 is imparted to one outer layer sheet 12 of the two sheets 12 and 13 constituting the exterior body 11 by the stretching process. ing. Moreover, although the stretchability is not provided to the other inner layer sheet | seat 13, the extensibility of the width direction of the diaper 1 is provided by this extending | stretching process. Here, “stretchability” means that the film can be extended in a predetermined direction and contracts when the extension is released.

  Each of the outer layer sheet 12 and the inner layer sheet 13 in the stretched portion P1 is broken to such an extent that some or all of the fibers or the like that are components of the sheet are stretched or broken by the stretching process. Since it is plastically deformed, it is easier to extend in a predetermined direction (width direction of the diaper 1) compared to a portion of the same sheet that has not been stretched (portion that has not undergone plastic deformation) and The amount of growth is increasing. That is, the sheets 12 and 13 themselves in the stretched portion P1 are easily stretched in the width direction of the diaper 1 even with low stress. For this reason, the stretched portion P1 has a large amount of elongation when pulled in the width direction of the diaper 1 as compared to an exterior body in a conventional diaper that has not been stretched, and is easily stretched with a small force. It has sex. Moreover, about the outer layer sheet | seat 12, in addition to such high extensibility, it has the property to shrink | contract when cancellation | release is extended | stretched, and has the said elasticity. The difference in the properties (stretchability or extensibility) developed in the sheets 12 and 13 in this way despite the same stretching process is mainly due to the difference in the raw materials (raw materials) of the sheets. It is. As will be described later, the raw sheet of the outer layer sheet 12 is a latent elastic sheet that develops stretchability by stretching, whereas the original fabric of the inner layer sheet 13 is stretchable, although it exhibits stretchability by stretching. It is a sheet that does not exhibit sex.

  In the stretching process in the manufacturing method of the present invention, the composite sheet formed by joining and integrating the first sheet and the second sheet may be stretched to give stretchability. Further, either one of the second sheet and the second sheet may be provided with elasticity, or both sheets may be provided with elasticity. Therefore, in the wearing article obtained by the manufacturing method of the present invention, like the diaper 1, only one of the two sheets 12 and 13 in the stretched portion P1 has stretchability and the other stretches. And a form in which both of the two sheets 12 and 13 in the stretched processed part P1 have stretchability are included. Like the diaper 1, even if only one of the two sheets 12 and 13 (sheet 12) in the stretched portion P1 is stretchable, the other sheet 13 is stretched. As described above, since the amount of elongation increases and has high extensibility, the sheet 13 in the stretched portion P1 sags due to contraction of the stretchable sheet 12, and as the sheet 12 extends. The sagging portion extends and does not hinder the stretchability of the sheet 12.

  Next, the 1st embodiment of the manufacturing method of this invention which is the method of manufacturing continuously the underpants type disposable diaper 1 is demonstrated with reference to FIG. In the manufacturing method of the first embodiment, the first sheet 120 and the second sheet 130 are joined and integrated to obtain the composite sheet 110, and the leg portion (the peripheral portion 60 of the leg opening 6) is formed on the composite sheet 110. A leg portion forming step, and a stretching step of imparting stretchability to the composite sheet 110 by stretching the composite sheet 110 on which the leg portion is formed. In the first embodiment, in the stretching step, the composite sheet 110 is stretched in the longitudinal direction [conveyance direction, machine direction (MD)] to impart MD stretchability to the composite sheet 110.

  In the manufacturing method according to the first embodiment, the strip-shaped first sheet 120 is used as the original fabric of the outer layer sheet 12, and the strip-shaped second sheet 130 is used as the original fabric of the inner layer sheet 13. The first sheet 120 does not substantially extend in the longitudinal direction [conveyance direction, machine direction (MD)] before the stretching process is performed, but after the stretching process, the first sheet 120 The stretched portion can be expanded and contracted to MD. That is, the first sheet 120 potentially has MD stretchability (extensibility) before being subjected to the stretching process, and such characteristics are not manifested, and the first sheet 120 is subjected to the stretching process. Thus, the stretchability (extension) of the MD of the part subjected to the stretching process is expressed, and it is a sheet to be called a latent stretchable sheet. Here, “substantially does not extend in a predetermined direction (MD in the first embodiment)” means that even if the tension during conveyance is applied in the predetermined direction (MD), it does not extend or is slightly extended. This means that the amount of elongation is less likely to fluctuate due to fluctuations in conveyance tension.

  On the other hand, the second sheet 130 does not substantially extend in the longitudinal direction (MD) before the stretching process is performed, but after the stretching process, the second sheet 130 is subjected to the stretching process. The part thus made can be expanded to MD. Here, regarding the second sheet 130, “substantially does not extend to MD” is the same as the definition in the first sheet 120 described above. That is, the second sheet 130 is not a latent elastic sheet like the first sheet 120, but as described above, the elongation amount in the predetermined direction is increased by the stretching process so that the extensibility in the predetermined direction is expressed. It is a sheet that has been made.

  In the manufacturing method of the first embodiment, first, the composite sheet 110 is obtained by joining and integrating the first sheet 120 and the second sheet 130. More specifically, as shown in FIG. 5, both sheets 120 and 130 are conveyed in the same direction (longitudinal direction), passed between a pair of nip rolls 71, and bonded to each other, and composite sheet 110. Get. The composite sheet 110 thus obtained is a latent elastic sheet due to the influence of the first sheet 120.

  The two sheets 120 and 130 in the manufacturing method of the first embodiment are bonded together with the waist elastic member 51 and the leg elastic members 61a and 61b sandwiched between the two sheets, as shown in FIG. ing. More specifically, before the sheets 120 and 130 are overlapped, the adhesive for fixing the elastic member and the sheet is fixed to a predetermined part of one or both of the sheets 120 and 130 facing each other. 52, 62, and 14 (see FIG. 3, not shown in FIG. 5) are coated, and the elastic members 51, 61a, and 61b are sandwiched in an extended state, and the sheets 120 and 130 are paired with a pair of nip rolls. The elastic members 51, 61a, 61b are fixed by narrowing the pressure between 71, and the sheets 120, 130 are joined. The leg elastic members 61a and 61b are introduced between the sheets 120 and 130 while being swung by a known swing guide in a direction (width direction, CD) perpendicular to the conveying direction of the sheets 120 and 130. . Thus, the elastic members 51, 61a, 61b are fixed in an extended state between the first sheet 120 and the second sheet 130 in the composite sheet 110.

  Next, as shown in FIG. 5, leg holes 112 are formed in the composite sheet 110 by removing the trim 111 for forming leg openings from the composite sheet 110. The peripheral part of the leg hole 112 is a part which finally becomes a leg part (peripheral part 60 of the leg opening 6). The trim 111 can be removed using a known cutting means such as a rotary cutter or a laser cutter.

  Thus, the composite sheet 110 in which the leg holes 112 are formed through the leg portion forming process is continuously conveyed in the longitudinal direction, and the composite sheet 110 being conveyed is stretched in the stretching process, so that the first sheet 120 Stretchability is imparted to the composite sheet 110 by developing potential stretchability. Between the first sheet 120 and the second sheet 130 in the composite sheet 110 before the stretching process, the elastic members 51, 61a, 61b are fixed in an expanded state, and the stretching process is fixed between the two sheets 120, 130. Although applied to the elastic members 51, 61a, 61b, there is no influence on these elastic members due to the stretching process. By such a stretching process, the stretchability (extension) of the MD of the first sheet 120 where the stretching process has been performed is expressed, whereby the stretchability of the MD is imparted to the composite sheet 110. 110 becomes an elastic sheet.

  As one of the main features of the production method of the first embodiment, a latent stretchable sheet [a sheet that exhibits stretchability (stretchability) of the stretched portion by being stretched] The point which performs a process (formation process of a leg part) required for this latent stretchable sheet before extending | stretching, ie, making the stretchability of a latent stretchable sheet express, is mentioned. In general, the stretchable sheet obtained by subjecting the latent stretchable sheet to stretching is easy to stretch due to the tension during its transport and has poor transport stability. Therefore, the stretchable sheet is transported while transporting the stretchable sheet alone. When various processing (cutting, bending, joining with other members, etc.) is performed, the variation in the tension causes a shift in the position for performing various processing such as the cutting position, the bending position, the joining position, There is a risk that the accuracy of processing such as cutting, bending, and joining may be reduced.

  Therefore, in the manufacturing method of the first embodiment, as described above, before the composite sheet 110 that is a latent elastic sheet is stretched, that is, it is necessary for the composite sheet 110 that does not substantially extend in the MD. For example, the leg portion is formed (removal of the trim 111 from the composite sheet 110). This facilitates the cutting and removal of the trim 111, stabilizes the cut shape of the leg hole 112, and lowers the order of the stretching process in all the diaper manufacturing processes. Since the conveyance distance of the composite sheet 110 exhibiting the property is shortened, the influence of the tension during the conveyance of the composite sheet 110 can be reduced. In the manufacturing method of the first embodiment, the two sheets 120 and 130 including the latent elastic sheet are joined and integrated to form the composite sheet 110, and then the leg portion forming process and the stretching process are performed. Therefore, compared with the case of handling one latent stretch sheet, the influence after stretch expression (after the stretching step) can be reduced.

  In the stretching process in the manufacturing method of the first embodiment, as a method of stretching the composite sheet 110, a gear stretching method is used in which a pair of sandwiching bodies having tooth grooves engaged with each other is used and the sheet is engaged between the sandwiching bodies. Adopted. The sandwiching body may have a pair of tooth groove rolls in which the tooth grooves are meshed with each other in a gear shape, or a flat plate shape. Alternatively, two sets of nip rolls may be used, and the sheet may be stretched in the transport direction between the rolls depending on the transport speed difference.

  The stretching process in the stretching process of the first embodiment is an inline process with a pair of tooth gap rolls 72 as shown in FIG. The pair of tooth groove rolls 72 has tooth grooves extending in the roll axial direction (CD) and meshing with each other on the peripheral surface portions. More specifically, tooth gaps are formed on the peripheral surface portions of the pair of tooth gap rolls 72, and high extension portions 73 extending in the axial direction of the rolls are spaced apart in the roll circumferential direction to form two pairs. The tooth gap is not formed between the adjacent high extension parts 73 and 73 in each roll, and a substantially flat low or non-extension part 74 is formed. Each of the highly elongated portions 73 has a substantially rectangular shape, and is formed over substantially the entire length in the axial direction with the longitudinal direction thereof coinciding with the axial direction of each roll. Two pairs of high extending portions 73 in the pair of tooth gap rolls 72 are formed so as to mesh periodically with the rotation of the rolls. In the highly elongated portion 73, a large number of teeth 80 (see FIG. 6) are formed at predetermined intervals in the circumferential direction of the roll, and a groove is formed between adjacent teeth 80. Between the mutually facing high stretched portions 73, the composite sheet 110, which is a stretched product, is subjected to stretch processing on the MD and extends to the MD. In the first embodiment, a stretching process is performed on a part of the composite sheet 110 (a part that becomes the stretched part P1 in the diaper shown in FIG. 2). The stretching process for the composite sheet 110 is performed while maintaining a state where tension is applied to the composite sheet 110 and the composite sheet 110 is conveyed in the longitudinal direction.

  FIG. 6 schematically shows a state in which the composite sheet 110 is stretched by the pair of tooth space rolls 72 in the stretching step. As shown in FIG. 6, teeth 80 having a predetermined height H are formed in the high extension portion 73, and when the high extension portions 73 of the pair of tooth gap rolls 72 are engaged with each other, The tooth gaps of both rolls are engaged with each other at a predetermined engagement depth D. Therefore, in the composite sheet 110 (particularly, the first sheet 120 which is a latent stretchable sheet), the portion caught between the opposing highly stretched portions 73 extends or breaks in part or all of the constituent fibers of the portion. Is generated and is plastically deformed to such an extent that it cannot be broken as a whole, thereby extending in the MD (longitudinal direction of the composite sheet 110) to become a high extension region. The stretched portion develops or improves stretchability. On the other hand, the portion of the composite sheet 110 that passes between the opposing low or non-stretched portions 74 is a low or non-stretchable region that does not substantially cause plastic deformation and does not substantially exhibit stretchability.

  In the manufacturing method of the first embodiment, after the leg part forming step and the stretching step are performed as described above, the same steps as the conventional manufacturing method of a so-called cross-flow type pants-type disposable diaper can be performed. it can. That is, as shown in FIG. 5, after the stretching process, a process of providing the composite sheet 110 with the absorbent main body 10 is performed. Specifically, the absorbent main body 10 obtained by cutting an absorbent main body continuous body (not shown) on the composite sheet 110 is rotated 90 degrees, and is bonded and fixed intermittently. The absorbent main body 10 is fixed to the composite sheet 110 while maintaining the stretched state of the composite sheet 110 (first sheet 120). In other words, the absorbent main body 10 is fixed while maintaining the composite sheet 110 so as not to shrink due to the contraction force of the first sheet 120.

  Next, the both side portions 12a and 12b of the composite sheet 110 are folded back so as to cover both end portions of the absorbent main body 10, and the both end portions are fixed, and then the composite sheet 110 is folded in two in a direction perpendicular to the conveying direction, Next, the side seal portion S is formed by heat sealing, ultrasonic sealing, high frequency sealing, or the like to obtain a diaper continuous body 1 ′. Thereafter, the pants-type disposable diaper 1 can be obtained by cutting the diaper continuous body 1 ′ into individual diapers.

  The method of rotating the absorbent main body 10 by 90 degrees and intermittently fixing it on the composite sheet 110 is not particularly limited, and for example, a method described in JP-A-6-296638 can be used. Moreover, the adhesive 15 (refer FIG. 3) which fixes the absorptive main body 10 to the composite sheet 110 can be applied to any one or both of the absorptive main body 10 and the composite sheet 110. In addition, although the process of mounting an absorber is after the leg part formation process in the first embodiment, it may be before the formation process.

  According to the manufacturing method of the first embodiment, the diaper 1 including the stretched portion P1 (see FIG. 2) having high stretchability (extensibility) in the diaper width direction is thus efficiently continuous. Can be manufactured. In particular, in the manufacturing method of the first embodiment, as described above, the first sheet 120, which is a latent elastic sheet, and the second sheet 130, which is not a latent elastic sheet, are joined and integrated to form a latent elastic property. After obtaining the composite sheet 110 which is a sheet and removing the trim 111 from the composite sheet 110 to form the leg holes 112 (leg portions), the composite sheet 110 is subjected to a stretching process to develop the stretchability of the MD. The composite sheet 110 has not yet substantially expanded to MD, and the composite sheet 110 has high conveyance stability (it is difficult to extend due to tension during conveyance). Since the leg portion forming step is performed, the trim 111 can be removed with high accuracy. Therefore, the shape of the leg hole 112 is uniform, the processing accuracy including the stretching process is high, and a pant-type absorbent article with high finishing accuracy can be manufactured stably and continuously.

  In addition, even if the second sheet 130 is not a latent stretch sheet and is a sheet that does not exhibit MD stretchability even if stretch processing is performed, the stretched portion of the composite sheet 110 is subjected to the stretch processing. The stretchability of the 1st sheet | seat 120 is not impaired by being extended | stretched, and the obtained diaper 1 originates in the stretchability of the 1st sheet | seat 120, and the exterior body 11 is a diaper width direction (left-right direction of FIG. 2). ), Stretchability is excellent, the slip prevention property is excellent, the flexibility and stretchability are excellent, and the size application range is wide. Further, these characteristics are further improved when the second sheet 130 is a sheet that exhibits stretchability by the stretching process, that is, when the second sheet 130 is a latent stretchable sheet like the first sheet 120.

  That is, since the diaper 1 obtained by the manufacturing method of the first embodiment has the stretched portion P1, the diaper 1 is flexible and has a wide size application range compared to the unstretched processed product. It can cope with the characteristic features and body shape and is excellent in preventing slippage. Moreover, since the exterior body 11 touches a wearer's skin gently, the diaper 1 has few tightenings, and there is a space | gap, it is hard to leave a mark on the skin, and it is excellent in a feeling of wear. Further, such a feature of the diaper 1 can be obtained by simply extending a member originally provided without changing the size of the diaper pattern (exterior body) or adding a new member. Therefore, although the diaper 1 has high performance, the material cost is reduced and the manufacturing cost is reduced, and it is environmentally friendly.

  Below, the latent elastic sheet used by this invention is demonstrated. As described above, the latent stretchable sheet is a sheet that does not substantially stretch before being subjected to the stretching process, but after the stretching process, the processed portion exhibits stretchability in a predetermined direction. The latent elastic sheet becomes an elastic sheet after being stretched. In the above embodiment, the first sheet 120 is a latent elastic sheet, but the second sheet 130 may be a latent elastic sheet, and both the sheets 120 and 130 may be latent elastic sheets. good. Hereinafter, when referring to the latent stretchable sheet in a state where stretchability after being stretched is expressed, it is referred to as a stretchable sheet.

  The latent elastic sheet does not substantially extend in a predetermined direction before being stretched. Specifically, the latent elastic sheet preferably has a maximum elongation of MD of 10% or less (the length only extends up to 1.1 times) before being stretched, and is in the same direction. More preferably, the maximum elongation of is 8% or less. The latent elastic sheet preferably has a maximum elongation of 10% or less (particularly 8% or less) in both the longitudinal direction and the width direction perpendicular thereto before being stretched. The elongation recovery rate and the maximum elongation are each measured by the following methods.

  When the latent stretchable sheet becomes a stretchable sheet, the maximum elongation in the longitudinal direction (MD) is 100% or more, and the elongation when stretched to 100% in that direction is then contracted. The recovery rate (elongation recovery rate at 100% elongation) is preferably 70% or more. Here, “elongation 100%” refers to a state in which a sheet having a length of 50 mm is extended to 100 mm, for example. Moreover, when a latent elastic sheet becomes an elastic sheet, it is preferable that the longitudinal direction (MD) is a sheet | seat which can expand | extend more largely than the width direction (CD). As an example of a preferred latent elastic sheet, when it becomes an elastic sheet, it stretches greatly in the longitudinal direction and contracts after expansion (maximum elongation of 100% or more and elongation recovery rate at 100% elongation of 70% or more However, in the width direction, there is a sheet that extends only slightly (for example, a maximum elongation of 50% or less). The elongation recovery rate and the maximum elongation are each measured as follows.

[Method for measuring elongation recovery rate]
A sample piece having a length of 50 mm and a width of 25 mm is prepared. Using a Tensilon device, the sample piece is fixed at the chuck interval L0, and the length L2 at the time of 100% elongation at a speed of 300 mm / min (L2 = L0 × 2) Then, the length of the sample piece when the tensile load becomes 0 after starting to return at the same speed as the tensile speed is defined as the length L1 after the elongation recovery. The elongation recovery rate at 100% elongation is calculated from the following equation.
Elongation recovery rate at 100% elongation (%) = [(L2-L1) / (L2-L0)] × 100

[Measurement method of maximum elongation]
A sample piece having the same size as that of the sample piece used in the method for measuring the elongation recovery rate is elongated under the same conditions, and the elongation at the time of breaking is defined as the maximum elongation. The point of time of rupture is a point where the tensile load shows the maximum value in the relationship curve between the elongation rate and the load.

  As the latent stretchable sheet used in the present invention, various sheets that exhibit stretchability in a predetermined direction by stretching can be used, and a single layer structure or a multilayer structure in which a plurality of layers are laminated may be used. For example, (1) a sheet in which an extensible fiber layer is integrated on both sides or one side of an elastic fiber layer, and (2) an extensible fiber layer is integrated on both sides or one side of a net-like elastic sheet. (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, (4) a large number of sheets arranged to extend in one direction without crossing each other An elastic sheet or the like in which the elastic filament is bonded to a stretchable nonwoven fabric over the entire length thereof in a substantially non-stretched state can be preferably used. In addition, as an integration method of the elastic fiber layer and the extensible fiber layer, these are laminated and hydroentangled, or the fibers are entangled by air-through, etc., heat embossing, adhesive, ultrasonic wave The method of joining by etc. is mentioned. As the sheet (1), for example, a fiber sheet used as a material for the stretchable nonwoven fabric disclosed in Japanese Unexamined Patent Application Publication No. 2007-138374 and Japanese Unexamined Patent Application Publication No. 2008-179128 can be used.

  On the other hand, when using a sheet (non-latent stretchable sheet) that is not a latent stretchable sheet as the first sheet or the second sheet according to the present invention, the non-latent stretchable sheet has an elongation amount in a predetermined direction by stretching. A sheet (hereinafter, also referred to as a latent stretchable sheet) that is increased and exhibits extensibility in a predetermined direction is used. In the above embodiment, the second sheet 130 is a latent stretchable sheet, but the first sheet 120 may be a latent stretchable sheet.

  As the latent extensible sheet, a nonwoven fabric, a laminate of a nonwoven fabric and a resin film, a porous film, and the like are preferable. In the first embodiment described above, the latent extensible sheet is the side of the composite sheet 110 that directly contacts the wearer's skin (second sheet 130), and thus the latent extensible sheet contacts the skin. When used for applications, a water-repellent nonwoven fabric is more preferable as the latent extensible sheet from the viewpoint of preventing leakage of excrement.

  Next, another embodiment of the production method of the present invention will be described with reference to FIGS. About the embodiment of the following manufacturing methods, a different component from the manufacturing method of the 1st embodiment mentioned above is explained mainly, the same component is attached with the same numerals and explanation is omitted. The description of the manufacturing method of the first embodiment is appropriately applied to components that are not particularly described.

  FIG. 7 is a schematic perspective view (corresponding to FIG. 5) showing an outline of the manufacturing process of the diaper in the second embodiment of the manufacturing method of the present invention. The manufacturing method of the second embodiment is different from the first embodiment described above in the portion to be stretched. That is, in the first embodiment, as shown in FIG. 2, two imaginary straight lines that extend through the entire length in the longitudinal direction of the diaper 1 through the side edges 10 s and 10 s along the longitudinal direction of the absorbent main body 10. Although not shown in the drawing, the stretching process was performed only outward in the width direction. However, in the second embodiment, the waistline portion of the diaper 1 is positioned before and after the diaper longitudinal direction across the region where the absorbent main body 10 is disposed. Stretching is performed only on the region to be performed (the region excluding the stretched portion P1 (the hatched portion) and the absorbent main body 10 in FIG. 2).

  The stretching process in the stretching process of the second embodiment is an in-line process with a pair of tooth gap rolls 75 as shown in FIG. The pair of tooth gap rolls 75 is the same as the tooth groove roll 72 shown in FIG. 5 except for the arrangement pattern of the high extension part 73 and the low or non-extension part 74. The arrangement pattern of the high stretched portion 73 and the low or non-stretched portion 74 in each of the pair of tooth gap rolls 75 corresponds to the portion to be stretched in the composite sheet 110 described above.

  Also according to the manufacturing method of the second embodiment, a pant-type absorbent article with high finishing accuracy can be manufactured stably and continuously, similarly to the manufacturing method of the first embodiment. Moreover, the diaper 1 obtained by the manufacturing method of the second embodiment has a waistline portion that is relatively stretchable as compared to the crotch portion, and can achieve the effects described above.

  FIG. 8 is a schematic perspective view (corresponding to FIG. 5) showing an outline of the manufacturing process of the diaper in the third embodiment of the manufacturing method of the present invention. The manufacturing method of the third embodiment is different from the first embodiment described above in the conditions for stretching (stretching degree, stretching direction, etc.). That is, in the first embodiment, a part of the composite sheet 110 is stretched only in the MD (longitudinal direction of the composite sheet 110). On the other hand, the stretching process is simultaneously performed in both directions of MD and CD (width direction of the composite sheet 110) orthogonal to the MD.

  As described above, in the manufacturing method of the third embodiment in which the stretching process is performed in the two directions of MD and CD, the belt-shaped first sheet 120 ′ is used as the raw sheet of the outer layer sheet 12. The first sheet 120 ′ does not substantially extend in both the longitudinal direction (MD) and the width direction (CD) before the stretching process is performed, but the stretching process is performed after the stretching process is performed. The applied part has the property that it can expand and contract in both the MD and CD directions.

  The stretching process in the stretching process of the third embodiment is an inline process with a pair of tooth gap rolls 77 as shown in FIG. A pair of high extension portions 73 in which tooth grooves are formed are formed in the entire area of both end portions in the roll axis direction (CD) in the peripheral surface portion of each of the pair of tooth groove rolls 77, and these pair of high height portions 73 are also formed. A high stretched portion 78 in which tooth grooves different from the high stretched portion 73 are formed is formed in the entire region between the stretched portions 73 (the central portion in the roll axis direction of each roll). Similarly to the high extension part 73, teeth 80 (see FIG. 6) having a predetermined height H are formed in the high extension part 78. In the highly elongated portion 78, a large number of teeth 80 are formed at predetermined intervals in the axial direction of the roll, and a groove is formed between adjacent teeth 80. That is, the arrangement direction of many teeth 80 in the high extension portion 78 is orthogonal to the arrangement direction of many teeth 80 in the high extension portion 73.

  The high stretched portions 73 in both rolls 77 are formed so as to periodically mesh with the rotation of the rolls, and in the stretching step, regions corresponding to the ventral side A and the back side B in the composite sheet 110 It is made to contact. Further, the high stretched portions 78 in both rolls 77 are formed so as to periodically mesh with the rotation of the rolls, and in the stretching process, contact with a region corresponding to the crotch portion C in the composite sheet 110. Has been made.

  In the stretching process of the third embodiment, the portions (the ventral side portion A and the back side portion) of the composite sheet 110 (particularly the first sheet 120 that is a stretchable sheet) that are bitten between the opposing high stretched portions 73. B) is a high elongation region that exhibits excellent stretchability in MD (longitudinal direction of the composite sheet 110), and a portion (inseam C) between the opposing high stretch portions 78 is CD (composite). It becomes a high elongation region that exhibits excellent stretchability in the width direction of the sheet 110.

  Also according to the manufacturing method of the third embodiment, a pant-type absorbent article with high finishing accuracy can be manufactured stably and continuously, similarly to the manufacturing method of the first embodiment. Moreover, as for the diaper 1 obtained by the manufacturing method of 3rd embodiment, the exterior body 11 of a waist part (abdominal side part A and back side part B) expands-contracts favorably in a diaper width direction (left-right direction of FIG. 2). At the same time, the exterior body 11 of the crotch C can be expanded and contracted favorably in the diaper longitudinal direction (vertical direction in FIG. 2), and the above-described effects can be obtained.

  FIG. 9 is a schematic perspective view (corresponding to FIG. 5) showing an outline of the manufacturing process of the diaper in the fourth embodiment of the manufacturing method of the present invention. In the manufacturing method of the fourth embodiment, the two sheets 120 and 130 in the leg part forming step are bonded together, and the waist elastic member 51, the leg elastic members 61a and 61b, and the absorbent main body 10 are placed between the two sheets. It is performed in a state of being sandwiched, and includes a step of providing the absorbent main body 10 to the composite sheet 110 before the stretching step. More specifically, before the sheets 120 and 130 are overlapped, the adhesive for fixing the elastic member and the sheet is fixed to a predetermined part of one or both of the sheets 120 and 130 facing each other. (Not shown) is applied, and the sheets 120 and 130 are tightly integrated between the pair of nip rolls 71 with the absorbent main body 10 and the elastic members 51, 61a, 61b in an extended state sandwiched therebetween. The composite sheet 110 is obtained.

  In the manufacturing method of the fourth embodiment, the composite sheet 110 obtained in this manner is removed from the trim 111 for forming the leg openings by a rotary cutter, a laser cutter or the like to form the leg hole 112, and then the composite sheet is formed. 110 is stretched in the stretching step.

  The stretching process in the stretching process of the fourth embodiment is an in-line process with a pair of tooth gap rolls 79 as shown in FIG. A pair of high-stretched portions 73 in which tooth grooves are formed are formed on each peripheral surface portion of the pair of tooth groove rolls 79 so as to be spaced apart from each other in the circumferential direction of the roll 79. Between the extending portions 73, no tooth gap is formed, and a substantially flat low or non-extended portion 74 is formed. The high stretched portion 73 and the low or non-stretched portion 74 are each formed over the entire length of the roll 79 in the roll axis direction. The high stretched portions 73 in both rolls 79 are formed so as to periodically mesh with the rotation of the rolls, and in the stretching step, the region of the composite sheet 110 sandwiched between the adjacent absorbent main bodies 10 and 10 is formed. It is made to contact | abut with the full length (absorbent main body non-arrangement field) of CD.

  In the stretching process of the fourth embodiment, the portion (absorbent main body non-arrangement region) of the composite sheet 110 (particularly, the first sheet 120 that is a stretchable sheet) bitten between the opposing highly stretched portions 73 is , A high stretch region that exhibits excellent stretchability in MD (longitudinal direction of the composite sheet 110). On the other hand, the portion of the composite sheet 110 that passes between the opposing low or non-stretched portions 74 (the arrangement region of the absorbent main body 10 and the region located outside the CD from the arrangement region) is substantially plastic. It becomes a low or non-extendable region which does not cause deformation and does not substantially exhibit stretchability.

  Also according to the manufacturing method of the fourth embodiment, a pants-type absorbent article with high finishing accuracy can be stably and continuously manufactured as in the manufacturing method of the first embodiment. Moreover, as for the diaper (not shown) obtained by the manufacturing method of 4th embodiment, the absorptive main body 10 is interposed between two sheets (outer layer sheet 12, inner layer sheet 13), and the absorptive main body The stretchability of the substantially entire non-arranged region is enhanced as compared to the region other than the absorbent main body non-arranged region in the absorbent main body 10, and the above-described effects can be obtained.

  FIG. 10 is a schematic perspective view (corresponding to FIG. 5) showing an outline of the manufacturing process of the diaper in the fifth embodiment of the manufacturing method of the present invention. The manufacturing method of the fifth embodiment is a modification of the manufacturing method of the first embodiment shown in FIG. 5, and includes a step of bending the composite sheet 110 in a direction (CD) perpendicular to the conveying direction before the stretching step. ing. In the manufacturing method of the first embodiment, after the trim 111 is cut and removed and before the composite sheet 110 is folded into a CD, the composite sheet 110 is stretched (stretched before folding) by the pair of tooth groove rolls 72. However, in the manufacturing method according to the fifth embodiment, such a pre-bending stretching process is not performed, but instead, the composite sheet 110 is folded (double-folded) into a CD (stretching after folding). Apply. The drawing process before bending and the drawing process after folding are the same in the drawing process, and are different only in the order in which they are performed in all steps of diaper production.

  In the manufacturing method of the fifth embodiment, as shown in FIG. 10, the diaper continuous body 1 'is stretched. The diaper continuum 1 ′ is the same as the diaper continuum 1 ′ in the manufacturing method of the first embodiment except that it is not stretched. Leg formation (cutting of the trim 111 from the composite sheet 110) It is manufactured through a removal step, a folding (double folding) step of the composite sheet 110 into a CD, and a side seal portion forming step. According to the manufacturing method of the fifth embodiment, similarly to the manufacturing method of the first embodiment, a pant-type absorbent article (diaper shown in FIG. 2) with high finishing accuracy can be manufactured stably and continuously. In the manufacturing method of the fifth embodiment, the composite sheet 110 folded in two (folded along the folding line along the MD) is subjected to a stretching process using a pair of tooth gap rolls 72. Compared to the first embodiment in which the stretching process is performed before the process, the CD length (the length along the axial direction of the tooth groove roll) of the material to be stretched (composite sheet 110) is short. The length of the 72 CDs can be shortened, and the space of the equipment can be saved.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the embodiment mentioned above, It can change suitably. For example, in the above-described embodiment, each of the first sheet 120 (outer layer sheet 12) and the second sheet 130 (inner layer sheet 13) is formed of a single sheet. You may use the composite sheet | seat which joined the sheet | seat which does not have a stretching property in strip | belt shape. Thereby, it becomes possible to arrange | position an elastic sheet only in the part which performs an extending | stretching process, and leads to cost reduction.

  In addition, the pant-type absorbent article manufactured in the present invention has a bonding state between the outer layer sheet 12 and the inner layer sheet 13 or a bonding state between the inner layer sheet 13 and the absorbent main body 10 as shown in FIGS. 3 and 4. However, it can be changed as appropriate. For example, in the above embodiment, the space between the two sheets 12 and 13 is added to the side seal portions A1, A2, B1, and B2, the peripheral portion 50 of the waist opening 5, and the peripheral portions 60 of the pair of leg openings 6. In the diaper width direction central part of each of the abdominal part A and the back side part B, it was joined by the adhesive 14 and was not joined in other parts, but there was no adhesive 14 and two sheets Between the sheet | seats 12 and 13, the junction part joined in the diaper width direction center part does not need to be provided. Further, the absorbent main body 10 may be joined to the exterior body 11 (inner layer sheet 13) via an adhesive 15 in substantially the entire area in the longitudinal direction. Even when such a joined state is adopted, since the two sheets 12 and 13 constituting the exterior body 11 are not joined to each other in a wide range, the outer surface of the diaper is soft and soft to the touch, and fit and breathability are achieved. Is excellent.

On the other hand, in the above-described embodiment, most of the ventral portion A and the dorsal portion B were not joined, but even in the portion that was not joined most, in order to prevent the sheet from floating, The adhesive may be applied to the entire area with a low basis weight, or the adhesive may be applied to the entire area with a dot pattern. The low basis weight of adhesive, coating amount is preferably 0.3 to 10 / m ^2, more preferably 0.5 to 3 g / m ^2. By applying the adhesive with a low basis weight or by partially applying the adhesive with a dot pattern, the influence on the stretchability of the diaper can be minimized.

  The scope of application of the present invention is all wearing articles having leg portions positioned around the wearer's legs when worn, and is not limited to the above-described pants-type disposable diapers. Diapers, sanitary napkins, and other absorbent articles having an absorbent core, wearing articles not having an absorbent core, for example, medical wearing articles such as surgical clothes, and other underwear such as disposable underwear It is also suitable for worn articles.

1 Pants-type disposable diapers (wear items)
1 'Diaper continuum 2 Top sheet 3 Back sheet 4 Absorbent core 5 Waist opening 6 Leg opening 10 Absorbent body 11 Exterior body 12 Outer sheet 13 Inner sheet 51 Waist elastic member 61a, 61b Leg elastic member 71 Nip rolls 72, 75, 76, 77, 79 Tooth groove rolls 73, 78 High stretch portion 74 Low or non-stretch portion 80 Teeth 110 Composite sheet 111 Trim 112 for forming leg opening Leg hole 120, 120 ′ First sheet 130 First 2 sheet A ventral side B back side C crotch P1 stretched part

Claims (8)

A method of manufacturing a worn article having a leg portion located around a wearer's leg when worn,
The first sheet and the second sheet are joined and integrated to obtain a composite sheet, and the leg part forming step for forming the leg part on the composite sheet;
A stretching method for subjecting the composite sheet on which the leg portions are formed to stretching, and imparting stretchability to the composite sheet.   The method for manufacturing a wearing article according to claim 1, wherein an elastic member is fixed in an expanded state between the first sheet and the second sheet in the composite sheet before the stretching step.   The first sheet and / or the second sheet does not extend practically before the stretching process is performed, but the stretched sheet exhibits stretchability in a predetermined direction after the stretching process. The method for producing a worn article according to claim 1 or 2.   In the stretching step, the portion of the composite sheet bitten between the pair of sandwiching bodies can be expanded and contracted by biting the composite sheet between a pair of sandwiching bodies having tooth grooves engaged with each other. The manufacturing method of the wearing article in any one of Claims 1-3 made. The wearing article has an abdominal side portion disposed on the abdomen side of the wearer when worn, a back side portion disposed on the back side, and a crotch portion positioned between the abdominal side portion and the back side portion. And
The manufacturing method of the wearing article in any one of Claims 1-4 which performs an extending | stretching process on the said composite sheet of the said belly side part and the said back side part in the said extending process. The wearing article has an absorbent main body having a liquid-retaining absorbent core,
The manufacturing method of the wearing article in any one of Claims 1-5 provided with the process which comprises the said absorptive main body in the said composite sheet after the said extending process. The wearing article has an absorbent main body having a liquid-retaining absorbent core,
The manufacturing method of the wearing article in any one of Claims 1-5 provided with the process which equips the said composite sheet with the said absorptive main body before the said extending | stretching process.   The manufacturing method of the wearing article of Claim 1 provided with the process of bend | folding the said composite sheet in the direction orthogonal to the conveyance direction before the said extending process.

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