WO2006025494A1

WO2006025494A1 - Method of manufacturing disposal pants

Info

Publication number: WO2006025494A1
Application number: PCT/JP2005/016020
Authority: WO
Inventors: Masaru Fujioka
Original assignee: Livedo Corporation
Priority date: 2004-09-01
Filing date: 2005-09-01
Publication date: 2006-03-09
Also published as: JP2006068211A

Abstract

A method of manufacturing disposable pants capable of efficiently coping with a change in size of the pants used for both pants and a diaper. The disposable pants (1) to which the method of manufacturing is applied comprise both functions of the pants and the diaper, and are formed so that a left front abdominal part (2a) and a right front abdominal part (2b) can be laterally expanded by breaking left and right side breaking parts (17a) and (17b). Adhesive pieces (22a) and (22b) attached to and detached from the adhesive part (23) of a center front abdominal part (2c) are fitted to the left front abdominal part (2a) and the right front abdominal part (2b). The size of the pants (1) can be changed by substantially changing only the lateral width dimension (X1) of the pants (1) without changing a structure for opening/closing the pants (1) (particularly, the vertical dimensions (L1) of the left and right side adhesive pieces (22a) and (22b)).

Description

Specification

How to use, throw away pants

Technical field

The present invention relates to a method for manufacturing disposable pants that can be used as both pants and diapers.

Background art

[0002] As a conventional disposable diaper of this type, there is a technique described in JP-A-5-317356. In the diaper described in this publication, cutting lines are provided on both the left and right sides of the front body, the front body can be separated at the cutting lines, and the attached pieces joined to the left and right joints of the front body and the back body Is provided. When the front body is cut off by the cutting line, the front body and the back body are fastened by the left and right attachment pieces.

[0003] In this type of common type diaper (or pants), the structure of adhering pieces and the like is complicated, so the burden on the manufacturing process and the like when resizing the diaper (or pants) is large.

[0004] Note that there is a technique disclosed in Japanese Patent Application Laid-Open No. 8-56988 regarding a technology for changing the size of disposable pants dedicated to pants. However, since the technology described in this publication is completely different from the common type to which the present invention is applied, such as the structure of the premise of the pan, there is no structure for opening and closing, it cannot be applied to common type pants. .

Disclosure of the invention

[0005] An object of the present invention is to provide a method for manufacturing disposable pants that solves the above-described problems and can efficiently cope with the size change of pants of a pants-diaper shared type.

[0006] In the first aspect of the present invention, the front abdomen and the back part that are substantially annularly connected, and a crotch part that is provided continuously between the front abdomen and the back part are provided, and an absorber is provided in the crotch part. Left and right broken parts for breaking the front abdomen are formed on both the left and right sides of the front part of the front abdomen where the crotch part is continuous. The left and right attached pieces are joined, and the left and right attached pieces are the outer surfaces of the front abdomen. A method for manufacturing a disposable pant that can be attached to and detached from an adhesion portion between the left and right fracture portions on the side, and a sheet-like base for a pant substrate that is continuously conveyed along a predetermined conveying direction. A step of joining the left and right adhering pieces for each unit section of the material, a step of folding the pant base material in half at a folded portion along the transport direction, and the pants folded in half For each unit section of the base material, the front side part that should be located on the front side of the wearer and the back side part that should be located on the back side of each unit section correspond to the left and right side parts around the waist. Joining each other at a portion, and cutting each unit section, and when changing the size of the disposable pants, without changing the vertical dimension of the left and right attachment pieces, the unit section Change the horizontal width dimension of Make changes size by the.

[0007] Further, in the second aspect of the present invention, in the first aspect, each of the attached pieces is a substantially strip-like base material formed by continuously attaching the attached pieces in the vertical direction. It is produced by cutting at a pitch corresponding to the vertical dimension.

[0008] Further, in the third aspect of the present invention, in the first or second aspect, the size of the disposable pants is changed without changing the crotch dimension of the disposable pants.

[0009] According to the first aspect, the size change is performed by changing the width dimension in the left-right direction of the pants without changing the vertical dimension of the left and right attachment pieces. The change in the size of the pants' diaper pants can be handled efficiently.

[0010] Further, according to the second aspect, since it is not necessary to change the cutting pitch of the substantially strip-shaped base material for producing the adhering piece, it is possible to efficiently cope with the size change of the disposable pants. Can do.

[0011] Further, according to the third aspect, since the size is changed without changing the crotch dimension of the disposable pants, the load on the production line due to the size change can be suppressed also in this respect. The size change can be handled efficiently.

The objects, features, aspects, and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings. Brief Description of Drawings

FIG. 1 is a front view of disposable pants to which a method for producing disposable pants according to an embodiment of the present invention is applied.

[Fig. 2] Fig. 2 is a view in which the right adhering piece of the disposable pants in Fig. 1 is broken.

FIG. 3 is a view showing a state in which the right front portion of the disposable pants of FIG. 1 is broken and the right front abdomen is developed.

4 is a view showing a state in which the left front portion of the disposable pants of FIG. 3 is broken and the left front abdomen is developed.

5 is a view showing a state where the crotch part of the disposable pants of FIG. 4 is developed.

6 is a view of the disposable pants of FIG. 5 viewed from the opposite side of FIG.

FIG. 7 is a cross-sectional view of a portion of the disposable pants of FIG. 1 taken along line C1-C1.

FIG. 8 is an enlarged view showing a joint portion between an attached piece and a front abdomen.

FIG. 9 is a cross-sectional view of a portion of the disposable pants of FIG. 5 taken along line C2-C2.

FIG. 10 is a process diagram of a manufacturing process of the disposable pants according to the embodiment of the present invention.

FIG. 11 is a diagram for explaining a manufacturing process for disposable pants.

FIG. 12 is a diagram for explaining a process of attaching the adhered piece to the front abdomen.

BEST MODE FOR CARRYING OUT THE INVENTION

[0014] <Overview of disposable pants>

First, with reference to FIG. 1 to FIG. 9, the use of the method for producing disposable pants according to one embodiment of the present invention will be described. As shown in FIGS. 1 to 9, the throwing pan 1 includes a front part 2 and a back part 3 that are connected in a substantially ring shape, and a crotch part 4 that is provided between the front part 2 and the back part 3. It can be used as both pants and diapers. In the description of the disposable pants 1, the left and right refer to the left hand side and the right hand side as viewed from the wearer.

[0015] The front abdomen 2 and the back back 3 refer to portions of the disposable pants 1 that mainly face the wearer's front abdomen and back back. The left and right edges of the front abdomen 2 and the left and right edges of the back part 3 are joined to each other, so that the front part 2 and the back part 3 are connected in a substantially annular shape. For this reason, the left and right edges of the disposable pants 1 have the left and right edges of the front abdomen 2 and the left and right edges of the back 3 A left side joint portion 1 la and a right side joint portion 1 lb are formed to join the edges of the left side joint. The joining at the side joining portions 11a and ib is performed by either one of adhesion using an adhesive, for example, a hot melt adhesive, ultrasonic welding (or heat welding), or a combination of both.

[0016] The crotch part 4 refers to a part of the disposable pants 1 that mainly faces the wearer's crotch part, and the front crotch part 4a and the back crotch part 4b are respectively connected to the front abdomen 2 and the back dorsal part 3, respectively. It has been. In the present embodiment, the front crotch portion 4a and the back crotch portion 4b of the crotch portion 4 are joined to the front abdominal portion 2 and the rear back portion 3 by an adhesive, for example, a hot melt adhesive. As a modified example, the crotch part 4 may be integrally formed by a member that is continuous with one or both of the front abdominal part 2 and the back part 3.

[0017] The waist opening Q is formed by the upper edge portions 12 and 13 of the front abdominal portion 2 and the rear back portion 3 that are connected in a substantially annular shape as described above. A left leg opening Ra is formed by the lower edge portion 14a of the left front abdominal portion 2a of the front abdomen 2, the inclined edge portion 15a below the left bevel of the back portion 3, and the left edge portion 16a of the crotch portion 4. A right leg opening Rb is formed by the lower edge 14b of the right front abdomen 2b of the front abdomen 2, the inclined edge 15b obliquely lower right of the back 3 and the right edge 16b of the crotch 4.

[0018] <Front abdomen>

As shown in FIG. 1, the front abdomen 2 has a generally horizontally long rectangular shape in plan view, and includes a left front abdomen 2a, a right front abdomen 2b, and a middle front abdomen 2c located in the middle thereof. Between the left front abdomen 2a and the middle front abdomen 2c, a left broken part 17a is formed that vertically cuts the front abdomen 2, and the front abdomen 2 is moved up and down between the right front abdomen 2b and the middle front abdomen 2c. A right rupture portion 17b that is longitudinally formed is formed. As shown in FIG. 7, a joint portion 18 of the crotch portion 4 with the front crotch portion 4a is formed in the middle front abdominal portion 2c. The joining at the joining portion 18 is performed using an adhesive, for example, a hot melt adhesive. The fracture portions 17a and 17b are formed by perforations as shown in FIG. 2, and by breaking the fracture portions 17a and 17b, as shown in FIGS. , 17b can be separated. Here, the fracture portions 17a and 17b may be formed in a straight line as shown in FIG. 2, or may be formed in a curved shape as necessary.

[0019] The upper edge portions 12a and 12b of the left front abdominal portion 2a and the right front abdominal portion 2b are provided with waist elastic members 19a, 19b is attached in the state extended in the left-right direction. Leg elastic members 20a and 20b are attached to the lower edge portions 14a and 14b of the left front abdominal portion 2a and the right front abdominal portion 2b so as to extend in the left-right direction. Body elastic members 21a and 21b are attached to the portions between the upper edge portions 12a and 12b and the lower edge portions 14a and 14b of the left front abdominal portion 2a and the right front abdominal portion 2b in a state of being stretched in the left-right direction. These elastic materials 19a, 19b, 20a, 20b, 21a, 21b are contracted and stretched so that the front abdomen 2 (especially the left front abdomen 2a and the right front abdomen 2b) is softly fit along the wearer's abdomen. can do.

As shown in FIG. 7, the front abdomen 2 has an elastic member 19a, 19b, 20a, 20b, 21a, between an inner layer sheet 57 on the skin surface side and an outer layer sheet 58 on the outer side. It is composed of 2 lbs.

[0021] On the outer front side of the left front abdomen 2a and the right front abdomen 2b, a substantially sheet-like left adhering piece 22a and a right adhering piece 22b are provided at first and second joining means, which will be described later. 71, 72. These adhering pieces 22a and 22b are used for fastening the pants 1 when the fracture portions 17a and 17b are fractured. On the outer surface side of the front abdomen 2, left and right fracture portions 17a and 17b It is provided so as to straddle. On the outer surface side of the middle front abdominal part 2c, an attaching part 23 for attaching the attaching pieces 22a, 22b is provided. The adhering portion 23 is continuously formed in a planar shape within a predetermined formation region A1. As shown in FIG. 4, the horizontal width W1 of the formation region A1 is set to be equal to or smaller than the distance D between the left and right fractured portions 17a and 17b (that is, the horizontal dimension of the middle front abdominal portion 2c). It is set to be approximately equal to the vertical dimension L1 of the pieces 22a and 22b.

[0022] The adhering pieces 22a and 22b include a substantially vertically long strip-like main body portion 24, two projecting portions 25 and 26 that are bifurcated vertically from the main body portion 24 and extend toward the free end side thereof. Respectively. As shown in FIG. 8, the joining portion 24a, which is the laterally outer end of the main body 24, is formed in the left front abdomen 2a and the right front abdomen 2b by two types of first and second joining means 71 and 72. It joins to the edge part by the side of the fracture | rupture parts 17a and 17b.

[0023] Here, the first joining means 71 is for preliminarily joining the adhering pieces 22a, 22b to the front abdomen 2 for positioning, and the second joining means 72 is the adhering pieces 22a, 22b. This is for joining the two front abdomen. The bonding strength per unit area of the first bonding means 71 is It is set smaller than the bonding strength per unit area of the two bonding means 72. Further, the area where the first joining means 71 is provided is provided in a larger area so as to include the area where the second joining means 72 is provided.

More specifically, as the first joining means 71, for example, a hot melt adhesive is used, and as the second joining means 72, for example, heat welding (or ultrasonic welding) is used. The hot melt adhesive that is the first joining means 71 is applied in a predetermined application pattern over substantially the entire joining portion 24a of the adhering pieces 22a and 22b. Heat welding (or ultrasonic welding), which is the second joining means 71, is applied in a dot shape so as to overlap the first joining means 71 in the joining portion 24a.

[0025] Examples of the application pattern of the hot-melt adhesive that is the first joining means 71 include various forms such as a stripe shape, a spiral shape, a solid shape, and a dot shape. Among these, in the present embodiment, a striped coating pattern extending in the vertical direction along the joint portion 24a is particularly preferable from the viewpoint of air permeability and strength. The types of hot melt adhesives include polyolefin (for example, those mainly composed of AP AO), rubber (for example, those mainly composed of SEBS, SBS, SIS, SEPS, etc.), vinyl acetate. In this embodiment, a polyolefin or rubber system is more preferable.

[0026] Adhering portions 27 and 28 are provided on the surface (skin surface side) facing the middle front abdominal portion 2c of the overhang portions 25 and 26 of the adhering pieces 22a and 22b, respectively. Also, an adhesion portion 29 is provided. These adhering portions 27 to 29 are detachably attached to the adhering portion 23 provided in the middle front abdominal portion 2c.

[0027] As a specific example of the adhering portion 23, a loop material having a non-woven fabric, a woven fabric, a knitted fabric or the like in which a fine loop structure is densely formed on the surface can be considered. As a specific example of the adhering portions 27 to 29, a hook material in which a fine hook structure that is detachably engaged with the loop material is densely formed on the surface can be considered. More specifically, as the adhering portion 23, for example, a plastic film composite material having a nonwoven fabric, a woven fabric, or the like suitably used as a loop material of a hook-and-loop fastener on the surface is used, and a joining means such as a hot melt adhesive is used. Is attached to the middle front abdomen 2c. As the adhering portions 27 to 29, a plastic film having pins densely formed on the surface preferably used as a hook material of a hook-and-loop fastener is used, and a hot melt adhesive or the like is used. The adhering pieces 22a and 22b are attached by the joining means. Alternatively, the outer surface side of the middle front abdominal part 2c may be surface treated so that it functions as a loop material (attachment part 23) instead of attaching the loop material to the middle front abdominal part 2c as a separate member.

[0028] As another specific example of the adhering portion 23, a plastic film or the like that is surface-treated, for example, peeled off so as to be repeatedly peelable from the adhesive can be considered. As other specific examples of the adhering portions 27 to 29, an adhesive that can be used repeatedly can be considered.

[0029] In addition, in the two specific examples of the attachment portion 23 and the attachment portions 27 to 29, the configuration on the attachment portion 23 side and the configuration on the attachment portions 27 to 29 side may be interchanged.

[0030] Further, the tip portions of the overhang portions 25, 26 of the adhering pieces 22a, 22b are knob portions 31 (see FIG. 4) in order to make the adhering pieces 22a, 22b easy to pinch. The knob portion 31 is not provided with attachment portions 27 and 28.

[0031] With such a configuration, when the protruding portions 25 and 26 of the right attached piece 22b are pinched and the attached portions 27 to 29 of the attached piece 22b are peeled off from the attached portion 23 and pulled outward in the right direction, FIG. As shown, the right fracture part 17b is torn and the right front abdomen part 2b is integrated with the adhering piece 22b and expands to the right. Similarly, if the left and right sticking pieces 22a of the sticking piece 22a are pinched and the sticking parts 27 to 29 of the sticking piece 22a are peeled off from the sticking part 23 and pulled leftward outward, as shown in FIG. The fracture part 17a is torn and the left front abdomen 2a is integrated with the adhering piece 22a to the left. At this time, the middle front abdomen 2c is kept joined to the crotch 4 and remains outside the front crotch 4a.

Therefore, as shown in FIG. 1, in the disposable pants 1, the front abdomen 2 and the crotch part 4 are fixed to each other by the joint part 18 in the state at the time of product shipment before breaking the broken parts 17a and 17b. Therefore, it functions as a pant and can be easily raised and lowered in the same manner as a normal single-use pant without opening and closing means such as attached pieces 22a, 22b. Further, in this state, even if the attachment pieces 22a, 22b and the attachment portion 23 are disengaged, the front abdominal portion 2 and the crotch portion 4 do not separate.

[0033] Also, when the disposable pants 1 are worn in the pants state, if the absorber 43 described later absorbs and holds excrement, the attachment pieces 22a and 22b are disengaged. , Rupture the breaking parts 17a, 17b and unfold the pants 1 easily. Can do. In this case, the pants 1 can be removed without taking off the wearer's clothes.

[0034] Further, after disengaging the attachment pieces 22a and 22b, breaking the fracture portions 17a and 17b, expanding the front abdomen 2, and confirming the contamination inside the pants 1, the attachment pieces 22a , 22b can be engaged with the attachment 23 to return the pants 1 to the original pants state. Further, even when the pants 1 and an auxiliary pad such as a urine collecting pad are used in combination, the attachment pieces 22a and 22b can be attached and detached to easily exchange the auxiliary pad.

[0035] Further, before wearing, the pants 1 are unfolded in the state shown in Fig. 5 and placed on the wearer's buttocks, and then closed in the order of Figs. 1 can be used like a normal disposable diaper. In this case, the pants 1 can be worn and removed without taking off the wearer's clothes.

In the present embodiment, as shown in FIG. 1, the left and right width dimensions XI of the front abdomen 2 (pants 1) and the left and right attachment pieces 22a and 22b are respectively left and right front abdomen. The specific force with the width dimension X2 in the horizontal direction at the position joined to 2a and 2b is in the range of 0.05 ≤ X2 / X1 ≤ 0.55. That is, when the disposable pants 1 are usually used for adults, the width direction dimension XI of the front abdomen 2 is about 450 mm to 900 mm, most preferably 500 mm to 720 mm. At this time, if the relationship between the width dimension XI and the width dimension X2 is set within the above range, the front abdominal part 2 other than the open / close region constituted by the left and right adhering pieces 22a, 22b (i.e., the left and right front abdominal parts 2a, The length in the left-right direction in (2b portion) can be secured relatively long. For this reason, a stretchable region having stretchability can be sufficiently secured as a whole of the front abdomen 2, and thereby, stretchability of the waistline portion can be secured satisfactorily, and as a result, when the disposable pants 1 are worn. Raising and lowering can be performed easily.

[0037] The dimension in the lateral width direction of the open / close region means the length between the outer edges of the left and right attachment pieces 22a, 22b, and corresponds to the lateral width dimension X2.

[0038] Accordingly, the open / close region is not too narrow, and good workability can be ensured without making the work difficult in the open / close operation by the left and right adhering pieces 22a, 22b.

[0039] More preferably, the specific force between the width dimension XI of the front abdomen 2 and the width dimension X2 at the position where the left and right attachment pieces 22a, 22b are joined to each other is 0. 10≤X2 / X1≤0 It should be in the range of 45. In this case, the open / close region constituted by the left and right attachment pieces 22a, 22b Since it is not too narrow and can be secured more widely, it is possible to more effectively prevent the work from becoming difficult when opening and closing with the left and right attached pieces 22a and 22b, and as a result, better workability can be secured. .

[0040] Further, as a more preferable aspect, it is desirable that the width dimension X2 is X2≤X3 with respect to the width dimension X3 in the lateral direction between both side edges of the front crotch part 4a in the crotch part 4. That is, the left and right attachment pieces 22a and 22b are joined to each other in the width region in the left-right direction of the front crotch portion 4a or at substantially the same position as both sides of the width region. Opening and closing work can be performed with the left and right adhesive pieces 22a and 22b in the overlapping area. For this reason, it is possible to secure good workability that facilitates opening and closing operations.

[0041] <Crotch>

As shown in FIG. 5, the crotch part 4 has a substantially band-like shape that extends in the front-rear direction when expanded, and includes a front crotch part 4a, a rear crotch part 4b, and a middle crotch located between them. It has a part 4c, and is mainly applied to the crotch part of the wearer centering on the middle crotch part 4c. As shown in FIGS. 5 to 7, the front crotch portion 4a is joined to the middle front abdominal portion 2c by the joining portion 18 in a state of being superimposed on the inner surface side of the middle front abdominal portion 2c. As shown in FIG. 5, the back crotch portion 4b is bonded and fixed to the back back portion 3 while being overlapped with the inner surface side of the back back portion 3. The leg elastic members 40a and 40b are attached to the left edge 16a and the right edge 16b of the crotch part 4 in a state of being extended in the extending direction of the edges 16a and 16b.

[0042] The crotch portion 4 is configured by sandwiching an absorbent body 43 between a liquid-permeable top sheet 41 and a liquid-impermeable back sheet 42. The absorber 43 has a predetermined lateral width and spreads in a belt shape in the front-rear direction around the middle crotch 4c. On both the left and right sides of the absorbent body 43 on the inner surface side of the crotch portion 4, standing portions 44a and 44b extending along the extending direction of the crotch portion 4 are provided.

[0043] For example, the top sheet 41 is composed of a liquid-permeable nonwoven fabric or the like, and the knock sheet 42 is composed of a water-repellent nonwoven fabric or the like. The absorbent body 43 is, for example, a paper sheet such as tissue paper or a liquid-permeable nonwoven fabric sheet obtained by mixing a granular polymer absorbent body with a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber. Wrapped with a cover sheet and molded into a predetermined shape.

[0044] The portions of the top sheet 41 and the back sheet 42 that do not overlap the absorber 43 face each other. The surfaces to be bonded are joined to each other by an adhesive such as a hot melt adhesive. More preferably, as shown in FIG. 9, the width of the top sheet 41 is set to cover the skin surface side of the absorbent body 43 and slightly smaller than the width of the back sheet 42. It is joined to the backsheet 42 by a partial force adhesive that protrudes from front to back, right and left beyond 43, for example, hot melt adhesive. The left and right side sheets 45a and 45b constituting the upright portions 44a and 44b are bonded to the skin surface side of the portion of the knock sheet 42 that protrudes on both the left and right sides of the top sheet 41 by an adhesive such as a hot melt adhesive. Yes.

[0045] Further, both end edges in the front-rear direction of the side sheets 45a, 45b are joined to both end edges in the front-rear direction of the crotch part 4 by an adhesive 60, for example, a hot melt adhesive. The inner side edges of the side sheets 45a and 45b are fixed by heat welding (or ultrasonic welding) or the like at the sealing portion 47 so as to wrap around the elastic member 46 extending in the front-rear direction. The upright portions 44a and 44b are erected in the direction of being pressed against the wearer's skin as shown in FIG.

In the present embodiment, as shown in FIG. 5, the left and right edges of the crotch 4 are overlapped with the front abdominal part 2 and the waist part 3a of the back part 3 at the inclined sides 48a, 48b, 49a and 49b, and the width is gradually reduced toward the edge in the front-rear direction.

[0047] The inclined sides 48a and 48b prevent the front crotch part 2a from turning up, bending, and affecting the skin of the wearer when the disposable pants 1 are raised and lowered. Can be raised or lowered.

[0048] Usually, in the region where the back portion 3 and the crotch portion 4 overlap, the contraction force of the back portion 3 tends to be weakened. However, by forming the trim region with the inclined sides 49a and 49b in the crotch part 4, the area of the stretchable part of the back part 3 gradually increases toward the upper side of the back part 3, and as a result, the back part 3 Makes it easier to fit the back of the wearer.

[0049] As a modified example of the configuration of the crotch portion 4, the absorbent body 43, which is not sandwiched between the sheets 41 and 42, is adhered to the skin surface side of the sheet 42, and the sheet 41 is omitted. It may be configured. Alternatively, a sheet having a sheet bonded to the front and rear ends of the absorber 43 may be used as the crotch portion 4, or the absorbent body 43 may be used as the crotch portion 4 using a large absorbent body 43. The steps 41 and 42 may be omitted. [0050] <Back>

As shown in FIGS. 3 to 6, the back 3 has a shape in which the left and right lower corners of a substantially rectangular shape are cut off substantially obliquely when unfolded, and is hung from the waist on the back side of the wearer to the buttocks. It is applied to the part. For this reason, the back portion 3 is connected to the wearer's buttocks, which is connected to the lower portion of the waist portion 3a and the waist portion 3a, which is substantially horizontally long in plan view, mainly located in the waist portion on the back side of the wearer. And a substantially trapezoidal flange 3b in plan view. A waist elastic member 51 is attached to the upper edge portion 13 of the waistline portion 3a in a state of being stretched in the left-right direction, and a body elastic member 52 is provided in the other region of the waistline portion 3a. It is attached in the state extended in the left-right direction. A leg elastic member 53a is attached to the slanted edge 15a on the lower back of the back 3 in a state of extending along the edge 15a. The leg elastic member 53b is attached to the edge 15b in a state of being stretched along the edge 15b. By contraction and extension of these elastic members 51, 52, 53a and 53b, the back portion 3 can easily fit the wearer's back and buttocks.

[0051] In particular, the heel part 3b of the back part 3 has a structure in which the lateral width is gradually narrowed downward, and the leg elastic members 53a, 53b are provided on the left and right inclined edges 15a, 15b. Therefore, when the edge portions 15a and 15b are contracted by the contraction force of the leg elastic members 53a and 53b, the flange portion 3b is easily fitted to the wearer's buttocks.

[0052] The leg elastic members 53a, 53b are attached to the heel part 3b continuously along the right and left inclined edges 15a, 15b and the lower edge part 15c of the heel part 3b, and then at least the crotch part 4 The portion 54 (see Fig. 6) that overlaps the absorber 43 is weakened. The weakening process is to make a no tension state by cutting the elastic member of the portion 54 or performing a process of weakening the contraction force. As a result, it is possible to prevent undesired distortion or the like from occurring in the absorber 43 due to the contraction force of the leg elastic members 53a and 53b, thereby reducing the absorption function.

[0053] <Other configurations and materials of each part>

The left and right elastic members 19a and 19b, the elastic members 20a and 20b, and the elastic members 21a and 21b provided in the front abdomen 2 are the same as in the case of the leg elastic members 53a and 53b, and the elastic members 20a, 20b, After 21a and 21b are installed in the front abdomen 2 continuously in the left-right direction via the middle front abdomen 2c, the portions located in the middle front abdomen 2c of the elastic members 20a, 20b, 21a and 21b It is preferable to apply weakening treatment.

[0054] Further, as the material configuration of the adhering pieces 22a and 22b, a nonwoven fabric, a woven fabric, a knitted fabric, and a plus chip material can be appropriately selected. Among these, a nonwoven fabric produced by a combination of one or a plurality of production methods among a spunbond method, an air-through method, a point bond method, a melt blow method, and an airlaid method is preferable. Furthermore, a nonwoven fabric produced by the basis weight 30-: LOOgZm ² and the spunbond method or the SMS method combining the spunbond method and the melt blow method is preferable from the viewpoint of strength. Most preferred is a nonwoven fabric manufactured by spun-bond method in basis weight 50~85gZm ^2. The material can be appropriately selected from synthetic fibers such as polypropylene, polyethylene, polyester and polyamide, and natural fibers such as pulp and silk. Preferably, synthetic fibers such as polypropylene, polyethylene and polyester can be used. A material mainly composed of polypropylene or polyester fiber has strength and is suitable. Most preferred is polyester fiber.

[0055] The elastic members 19a, 19b, 20a, 20b, 21a, 21b, 40a, 40b, 46, 53a, 53b are elastic elastic materials (polyurethane yarns, polyurethane films, natural rubbers) that are usually used in disposable pants. Etc.) and is stuck to a predetermined part of the pants 1 by a sticking means such as hot melt adhesive, heat welding, ultrasonic welding in the stretched state.

[0056] <Manufacturing process>

Next, the manufacturing process of the disposable pants 1 will be described with reference to FIGS. That is, in the present embodiment, as shown in FIG. 11, in the intermediate forming step S1 in FIG. 10, the intermediate body 76 having a configuration in which the pants 1 are cut and developed at the left and right edges around the waist is It is formed in a state where a plurality of pans 1 are continuously connected in the left-right direction. The intermediate body 76 includes a front abdominal base material 77 continuously connected in one direction, a back base material 78 continuously connected in one direction, and unit sections B1 of the front abdominal base material 77 and the back base material 78. And a crotch portion 4 provided for each. The intermediate body 76 corresponds to the pant base material of the present invention, and the structure of the intermediate body 76 and the pants 1 is formed for each unit section B1.

[0057] Then, in the subsequent bi-folding step S2 of FIG. 10, the intermediate body 76 is folded in half at the folding portion 76a along the conveying direction A.

[0058] In the subsequent joining and cutting step S3 of Fig. 10, the front abdomen 2 of the intermediate body 76 folded in half (front The pants 1 created by joining the back side part) and the back part 3 (back side part) to each other at the left and right side joints 11a, l ib around the waist Is cut with a cutting device not shown.

[0059] Before attaching the crotch portion 4 to the front abdominal base material 77 and the back base material 78, the elastic members 19a, 19b, 19a, 19b, 20a, 20b, 21a, 21b, 40a, 40b, 46, 53a, 53b. Also, the left and right attachment pieces 22a, 22b and the attachment portion 23 are also introduced into the crotch 4 attaching process in a state where they are attached to the front abdominal substrate 77. Is desirable.

[0060] Next, with reference to FIG. 12, a process of attaching the attached pieces 22a, 22b, etc. will be described. This sticking step is included in the intermediate forming step S1. As shown in FIG. 12, the front abdominal base material 77 to which the adhering pieces 22a and 22b are attached is transported along a predetermined transport direction A1, and the structure of the front abdomen 2 is sequentially formed for each unit section B1. It will be formed.

[0061] The left and right adhering pieces 22a and 22b are formed by sequentially cutting the first adhering substrate 87 and the second adhering substrate 88 continuously connected along the predetermined conveying direction A3 at a predetermined pitch. By the way, it is made. Further, the adhering portion 23 is also manufactured by sequentially cutting the third adhering substrate 89 continuously connected along the predetermined conveying direction A3 at a predetermined pitch. The adhering pieces 22a and 22b and the adhering portion 23 are formed in such a state that they are continuously connected in the vertical direction. Further, in this embodiment, the transport direction A3 of the first to third adhesion base materials 87 to 89 is set in a direction parallel to the reverse direction to the transport direction A2 of the front stomach base material 77, but in the same direction. Even if it is sent in parallel.

[0062] In the present embodiment, the first adhering substrate 87 and the second adhering substrate 88 are formed after the adhering portions 27 to 29 are formed on one side of each unit section B2, and then the third adhering substrate It is conveyed in a state of being overlaid on the lower side of 89, and an adhesive application process and a cutting process are performed. In the state shown in FIG. 12, the adhering portions 27 to 29 are formed on the surfaces of the first and second adhering substrates 87, 88 facing the third adhering substrate 89.

[0063] As described above, the application of an adhesive, for example, a hot melt adhesive, that serves as the first joining means 71 to the first adhesion base 87 and the second adhesion base 88 is performed as described above. In the state where 87 and 88 are superimposed on the lower side of the third adhesion base material 89, the upper surface side force in the state shown in FIG. 12 is also performed. The In other words, the adhesive is applied to the entire surface of the portion corresponding to the joining portion 24a of the adhering pieces 22a and 22b on the upper surface side of the first and second adhering substrates 87 and 88 in FIG. It is applied by a coating device (not shown). Along with this, a coating device (not shown) with an application pattern (not shown) such as an adhesive (not shown) such as hot melt adhesive force S stripe or spiral on the upper surface of FIG. Is applied.

[0064] Then, when the adhesive application process is completed, the first to third adhesion base materials 87 to 89 are sequentially fed to the cutting and transfer section C1, and the unit section B2 by a cutting device (not shown). It is cut every time. The cut attachment pieces 22a and 22b and the attachment portion 23 are overlapped and rotated 90 degrees in the vertical and horizontal directions as shown by arrows D1 and D2 by a transfer device (not shown), and further bonded. The front and back directions are reversed so that the agent application surface comes into contact with the front abdominal base material 77, and is sequentially attached to a predetermined location of the front abdominal base material 77 (first joining step). The sticking of the adhering pieces 22a and 22b at this stage serves as a preliminary joining for positioning prior to the main joining described later. Further, this sticking is performed in the pre-joining section C2 in the transport process of the front belly base material 77. In this preliminary joining step, the portion of the front belly base material 77 to which the adhering pieces 22a, 22b and the adhering portion 23 are adhered may be pressed by a pressing means such as a roller to increase the adhering force. Good. For the adhering portion 23, the sticking process to the front belly base material 77 is completed in this first joining step.

[0065] The portion of the front belly base material 77 to which the adhering pieces 22a and 22b and the adhering portion 23 are pre-joined is conveyed to the main joining section C3, and a second joining step for the main joining of the adhering pieces 22a and 22b is performed. Applied. In this step, the joining portions 24a of the adhering pieces 22a and 22b and the front belly base material 77 are joined in a dot-like joining pattern by heat welding (or ultrasonic welding) as the second joining means 72. Thereby, the sticking process to the front belly base material 77 of the adhesion pieces 22a and 22b is completed. This joining process is performed by a heat welding device (or ultrasonic welding device) (not shown).

[0066] In this embodiment, the adhering pieces 22a and 22b and the adhering part 23 are attached to the front abdomen 2 at a time with the adhering pieces 22a and 22b overlapped. Alternatively, the attachment portion 23 may be attached separately. For example, after adhering the adhering portion 23 first, a method of adhering the adhering pieces 22a, 22b may be considered.

[0067] <Measures for resizing> In the disposable pants 1, it is necessary to manufacture a plurality of types of pants 1 having different waist circumferences in order to cope with differences in the wearer's body shape.

[0068] With regard to this point, in the present embodiment, when the size of the pants 1 is changed, the width of the pants 1 in the left-right direction is substantially changed without changing the configuration of the left and right attachment pieces 22a, 22b. The size is changed by changing only the dimension XI (see Fig. 1) to larger or smaller. When the width dimension XI of the pants 1 is changed, the width dimension along the transport directions Al and A2 of the unit section B1 is also changed accordingly. It is known that the size of the open / close area does not necessarily change in function even if the size of pants 1 is changed.

[0069] As a specific example of the configuration that is not changed when the size is changed, first, the vertical dimension L1 of the adhering pieces 22a and 22b is given, and the vertical width W2 of the adhering portion 23 is not changed accordingly. Further, the distance D between the left and right broken portions 17a and 17b, the width dimension X2, and the lateral width W1 of the attachment portion 23 are not changed. In addition, the rise dimension L2 of the pants 1 is not changed.

[0070] Thus, when the size of the pants 1 is changed, the formation pitch of the intermediate body 76 with respect to the front belly base material 77 and the back base material 78 that are substantially continuous in a belt-like manner on the production line of the pants 1 is substantially reduced. Changing only the (width dimension along the transport direction Al, A2 of the unit section B1) makes it possible to cope with the size change.

[0071] Summary>

As described above, according to the present embodiment, the structure for opening and closing the pant 1 (particularly the vertical dimension L1 of the left and right attachment pieces 22a, 22b, etc.) is substantially changed without changing the left and right direction of the pant 1. Since the size of the pants 1 is changed by changing only the width dimension XI, changes in the production line can be minimized, and the size change of the pants 1 for pants and diapers can be handled efficiently. .

[0072] In particular, it is not necessary to change the cutting pitch of the first to third adhesion base materials 87 to 89 for forming the adhesion pieces 22a and 22b and the adhesion portion 23, the shape of the adhesion pieces 22a and 22b, and the like. Therefore, it can respond efficiently to the size change of pants 1.

[0073] In addition, since the size is changed without changing the rise dimension L2 of the pants 1, Therefore, the burden on the production line due to the size change can be suppressed, and the size change can be handled more efficiently.

Claims

The scope of the claims

[1] An anterior abdomen and a back part that are continuous in an annular shape, and a crotch part that is provided continuously between the front abdomen and the back part, and an absorber is provided in the crotch part, and the crotch part in the front abdomen Left and right broken parts for breaking the front abdomen are formed on the left and right sides of the continuous part, and left and right adhesion pieces are joined to the left and right broken parts of the front abdomen from the left and right broken parts, A method for producing disposable pants, wherein the left and right attachment pieces are attached to and detached from the attachment portion between the left and right fracture portions on the outer surface side of the front abdomen,

A step of joining the left and right adhering pieces for each unit section of the sheet-like base material to a pant base material that is continuously conveyed along a predetermined conveying direction;

The step of folding the pant base material in half at the folded portion along the transport direction, and the front surface of the wearer in each unit section for each unit section of the pant base material folded in half Joining the front side part to be located on the side and the back side part to be located on the back side to each other at the part corresponding to the left and right side parts around the waist, and cutting each unit section;

With

When changing the size of the disposable pants, the size is changed by changing the horizontal dimension of the unit section without changing the vertical dimension of the left and right adhesive pieces. , A manufacturing method of discarded pants.

[2] The use according to claim 1, in the method for producing discarded pants!

Each of the attached pieces is

A method for producing a disposable pan, characterized in that it is produced by cutting a substantially strip-like base material formed by continuously connecting the adhering pieces in the longitudinal direction at a pitch corresponding to the longitudinal dimension.

[3] In the method for producing disposable pants according to claim 1 or 2,

The method for producing disposable pants, wherein the size of the disposable pants is changed without changing the crotch dimension of the disposable pants.