Device for manufacturing stretchable laminated sheet, method for manufacturing stretchable laminated sheet, and wearing article using stretchable laminated sheet

Abstract

Provided are a manufacturing device and a manufacturing method for a stretchable laminated sheet having good air permeability. A device (100) for manufacturing a stretchable laminated sheet (L) is a device for manufacturing a stretchable laminated sheet in which non-woven fabric sheets (S1, S2) and a stretchable film (F) are arranged so as to overlap each other, and the non-woven fabric sheets and the film are joined together. A device for manufacturing a stretchable laminated sheet is provided with a lamination joining mechanism (48) and a laminated sheet extension mechanism (60). The laminating and joining mechanism is provided with an extension roller (40) and a welding head (43). The laminating and joining mechanism sandwiches a laminated body (B) in which a non-woven fabric sheet and a film in an extended state are laminated between an extension roller and a welding head, and thermally fuses the non-woven fabric sheet and the film to form an extended and contracted laminated sheet. The laminated sheet extension mechanism has a pair of gear rollers (62, 64) having recesses and projections on the circumferential surfaces. The laminated sheet body extension mechanism extends the telescopic laminated sheet body which passes between the pair of gear rollers and is conveyed.

Description

Technical Field

[0001] The present invention relates to a device and a method for manufacturing a stretchable laminate sheet used in a wearing article, and a wearing article using the stretchable laminate sheet. Background Art

[0002] In the past, there have been known a manufacturing device and a manufacturing method for a stretchable laminated sheet for a wearable article, which is formed by overlapping a nonwoven fabric sheet and a stretchable film (for example, see Patent Document 1 (International Publication No. 2019 / 150801)). The stretchable laminated sheet is used, for example, for the torso of a wearable article and is worn on the torso of the wearer.

[0003] Among the sheets used to manufacture the stretchable laminated sheet, the nonwoven sheet has air permeability, but the stretchable film does not have air permeability. Therefore, when the stretchable laminated sheet is used in a wearable article, it is possible to cause the undesirable situation of being stuffy when wearing.

[0004] However, in the manufacturing process of the stretch laminate, when the nonwoven fabric sheet and the film are heat-fused, the film may be broken around the heat-fused portion. Therefore, when the wearer wears the garment using the stretch laminate, air can pass through the broken portion of the film, thereby suppressing the stuffiness during wearing to a certain extent.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: International Publication No. 2019 / 150801 Summary of the invention

[0008] Problems to be solved by the invention

[0009] However, in the case of the film being broken around the heat-sealed portion, an opening of a sufficient area cannot be ensured when the garment is worn, and there is a possibility that stuffiness cannot be sufficiently suppressed.

[0010] An object of the present invention is to provide an apparatus and a method for producing a stretchable laminate sheet having good air permeability, and a wearing article using the stretchable laminate sheet having good air permeability.

[0011] Means for solving problems

[0012] The manufacturing device of the telescopic laminated sheet of the present invention is a manufacturing device of the telescopic laminated sheet formed by overlapping and arranging a substrate sheet and a stretchable film, and joining the substrate sheet and the film. The manufacturing device of the telescopic laminated sheet comprises a joining portion and an extending portion. The joining portion comprises a first joining member and a second joining member. The joining portion sandwiches a laminated body formed by overlapping a substrate sheet and a film in an extended state between the first joining member and the second joining member, and heat-seals the substrate sheet and the film to form the telescopic laminated sheet. The extending portion comprises a pair of gear rollers having concave and convex surfaces on the circumferential surface. The extending portion extends the telescopic laminated sheet conveyed through the pair of gear rollers.

[0013] The method for manufacturing a telescopic laminated sheet of the present invention is a method for manufacturing a telescopic laminated sheet formed by overlapping and arranging a base sheet and a telescopic film, and bonding the base sheet and the film. The method for manufacturing a telescopic laminated sheet comprises a welding step and a stretching step. In the welding step, the base sheet and the film in an extended state are thermally welded to form a telescopic laminated sheet. In the stretching step, the telescopic laminated sheet conveyed between a pair of gear rollers having concave and convex circumferential surfaces is stretched by a pair of gear rollers.

[0014] Effects of the Invention

[0015] In the manufacturing device and manufacturing method of the stretchable laminated sheet of the present invention, on the basis of forming the stretchable laminated sheet by heat-melting the substrate sheet and the film, stretching processing is performed using a gear roller with projections and depressions on the peripheral surface, thereby forming openings of sufficient area at the heat-melting position of the substrate sheet and the film and / or their periphery, thereby being able to manufacture a stretchable laminated sheet with good air permeability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram showing the overall structure of the manufacturing apparatus of the stretchable laminated sheet body according to the first embodiment.

[0017] Figure 2 It is a schematic cross-sectional view of a stretchable laminated sheet with the film in an extended state.

[0018] Figure 3 It is a schematic cross-sectional view of a stretchable laminated sheet with the film in a non-stretched state.

[0019] Figure 4 This is a schematic diagram of a wearing article using a stretchable laminate sheet.

[0020] Figure 5 yes Figure 1 A control block diagram of a device for manufacturing a telescopic laminated sheet.

[0021] Figure 6 yes Figure 1An enlarged overview of the extension rollers and welding head of the telescopic laminated sheet manufacturing device.

[0022] Figure 7 It is a diagram showing an example of the arrangement of connection parts formed in the stretchable laminated sheet body.

[0023] Figure 8 It is a partially enlarged plan view of the telescopic stacked sheet body before the gear is extended, and a schematic cross-sectional view along the arrow X1-X1 in the partially enlarged plan view.

[0024] Fig. 9 It is an enlarged plan view of the outline of the telescopic stacked sheet body after the gear is extended, and an outline cross-sectional view of the arrow X2-X2 in the enlarged plan view of the outline.

[0025] Fig.10 This is a photo of the telescopic laminate before the gear is extended.

[0026] Fig.11 This is a photo of the telescopic laminate after the gear is extended.

[0027] Fig.12 This is a schematic diagram showing the structure of a manufacturing apparatus for a stretchable laminate sheet according to a second embodiment, in which the film forming section is omitted.

[0028] Fig.13 yes Fig.12 A control block diagram of a device for manufacturing a telescopic laminated sheet.

[0029] Fig.14 This is a schematic diagram showing the structure of a manufacturing apparatus for a stretchable laminate sheet according to Modification 2, in which the depiction of a film forming section is omitted.

[0030] Fig.15 yes Fig.14 A control block diagram of a device for manufacturing a telescopic laminated sheet.

[0031] Fig.16 The diagram shows an example of where a stretchable laminate sheet is used in an example of a wearing article.

[0032] Fig.17 The diagrams show examples of usage locations of stretchable laminate sheets in wearing articles of other examples. DETAILED DESCRIPTION

[0033] Hereinafter, a manufacturing apparatus and a manufacturing method of a stretchable laminated sheet according to an embodiment of the present invention will be described with reference to the drawings.

[0034] <First embodiment>

[0035] (1)Overview

[0036] Reference Figure 1 to Figure 4 , a manufacturing apparatus 100 of a stretchable laminate sheet L according to a first embodiment will be described. Figure 1 1 is a schematic diagram showing the overall structure of a manufacturing apparatus 100 for a stretchable laminate sheet L. Figure 2 2 is a cross-sectional view of the stretchable laminate sheet L in which the film F constituting the stretchable laminate sheet L is in a stretched state. Figure 3 It is a cross-sectional view of the stretchable laminate sheet L in which the film F is in a non-stretched state. Figure 4 1 is a schematic diagram of a wearing article 200 using a stretchable laminate sheet L.

[0037] (1-1) Telescopic laminated sheet

[0038] First, the stretchable laminate sheet L which is the manufacturing target of the manufacturing apparatus 100 will be described.

[0039] The stretchable laminated sheet L is a stretchable sheet formed by laminating multiple sheets / films. Figure 2 as well as Figure 3 As shown, the stretchable laminate sheet L includes an elastic (stretchable) film F, a first nonwoven fabric sheet S1 as an example of a substrate sheet, and a second nonwoven fabric sheet S2 as an example of a substrate sheet. In the stretchable laminate sheet L, the film F is arranged between the first nonwoven fabric sheet S1 and the second nonwoven fabric sheet S2. In other words, in the stretchable laminate sheet L, the nonwoven fabric sheet and the film F are arranged to overlap. In the stretchable laminate sheet L, the first nonwoven fabric sheet S1 and the film F are intermittently joined at the joining portion J, and the second nonwoven fabric sheet S2 and the film F are intermittently joined at the joining portion J.

[0040] In addition, here, the three-layer structure of the first nonwoven fabric sheet S1, the second nonwoven fabric sheet S2 and the film F is used as an example for explanation, but the stretchable laminated sheet can also be a laminated sheet / film of more than four sheets. In addition, the stretchable laminated sheet can also be a two-layer structure of the first nonwoven fabric sheet S1 and the second nonwoven fabric sheet S2 and the film F.

[0041] Furthermore, the nonwoven fabric sheet is an example of a substrate sheet, and the substrate sheet may be a sheet other than a nonwoven fabric sheet.

[0042] like Figure 2 As shown, when the stretchable laminate sheet L is fully stretched along the conveying direction A of the stretchable laminate sheet L in the manufacturing device 100 described later, the first nonwoven fabric sheet S1, the film F and the second nonwoven fabric sheet S2 are parallel to each other. Figure 2 As shown, when the film F of the stretch laminate sheet L is stretched in the conveying direction A, the first nonwoven fabric sheet S1, the film F, and the second nonwoven fabric sheet S2 are parallel to each other.

[0043] On the other hand, when the stretched state of the stretchable laminate sheet L is released (in a state where no force acts on the stretchable laminate sheet L in the conveying direction A), the film F is relatively Figure 2 The state of shrinkage, so, if Figure 3 As shown in FIG. 1 , the interval between the joints J (the dotted portions) becomes shorter. As a result, the first nonwoven fabric sheet S1 and the second nonwoven fabric sheet S2 are bent, and irregularities are formed on the surface of the stretchable laminate sheet L (see FIG. 1 ). Figure 3 ).

[0044] This stretch laminate sheet L is used in a wearing article. Specifically, a sheet piece cut from the stretch laminate sheet L in a direction perpendicular to the conveying direction A is used in a wearing article. In addition, the sheet piece cut from the stretch laminate sheet L is also referred to as the stretch laminate sheet L. The type of wearing article using the stretch laminate sheet L is not limited, and the wearing article is, for example, a disposable diaper, a disposable medical gown, etc. In addition, the use of the stretch laminate sheet L is not limited, and the stretch laminate sheet L can be widely used in wearing articles, for example, a waist member worn on the waist of the wearer, a cuff member worn around the wrist of the wearer, a hem member worn on the ankle of the wearer, etc.

[0045] As an example, refer to Figure 4 A disposable diaper as a wearing article 200 using the stretch laminate sheet L will be described.

[0046] like Figure 4 As shown, the wearing article 200 includes a front body portion 210, a rear body portion 220, a crotch portion 230, and an absorbent article 240. In the wearing article 200, a gap is provided between the front body portion 210 and the rear body portion 220. When the wearing article 200 is worn, the front body portion 210 and the rear body portion 220 face each other. The crotch portion 230 is connected to the front body portion 210 and the rear body portion 220. The front body portion 210 and the rear body portion 220 are connected via the crotch portion 230. The absorbent article 240 is arranged to straddle the crotch portion 230. When the wearing article 200 is worn, the wearing article 200 is folded at the crotch portion 230, the front body portion 210 is arranged on the ventral side, and the rear body portion 220 is arranged on the dorsal side. When the wearing article 200 is worn, the front body portion 210 and the back body portion 220 are connected by a fastening member such as a belt (not shown).

[0047] In the wearing article 200, the stretch laminate sheet L is used in the front body portion 210 and the back body portion 220. The stretch laminate sheet L is used in the front body portion 210 and the back body portion 220 in a state where the conveying direction A and the waist direction coincide with each other.

[0048] Reference Fig.16 as well as Fig.17Specific examples of where the stretchable laminate sheet L is used in a wearing article will be described.

[0049] Fig.16 The wearing article 300 shown as an example is a disposable diaper which has a substantially T-shape when unfolded (before being worn). The wearing article 300 has a separate waist member 310 and an absorber 320 attached to the waist member 310 .

[0050] The waist member 310 is a member arranged on the waist of the wearer. The waist member 310 includes a waistline portion 312 ( Fig.16 The shaded portion of the straight line in the upper right center) and the lower waist portion 314 ( Fig.16 The waistline portion 312 is a portion that is disposed at the upper end of the waist member 310 when worn and is disposed at the waistline (height position near the waist bone) of the wearer (covering the waistline). The lower waistline portion 314 is a portion that is disposed below the waistline portion 312 when worn and covers the lower part of the waist of the wearer's body. An absorbent body 320 is attached to the center portion of the lower waistline portion 314 in the left-right direction (width direction) in a manner orthogonal to the lower waistline portion 314.

[0051] The waistline portion 312 and the lower waistline portion 314 are separate members, and they can be joined to form the waistline member 310. The waistline portion 312 and the lower waistline portion 314 can also be formed integrally (from the same material).

[0052] The absorber 320 is a member that is joined to the waist member 310 and is disposed in the crotch of the wearer when the wearer wears the garment. The absorber 320 includes an absorbent article (not shown), and the absorbent article mainly absorbs body fluids such as urine and sweat.

[0053] The stretchable laminate sheet L manufactured by the manufacturing method of the present disclosure is used for the waistline portion 312 and / or the lower waistline portion 314 of the waist member 310 of the wearing article 300. Thus, the wearing article 300 having good breathability also in the stretchable laminate sheet L portion can be realized.

[0054] In addition, the stretchable laminate sheet L manufactured by the manufacturing method of the present disclosure has openings Op1 formed at the joint J in addition to around the joint J of the pair of nonwoven fabric sheets S1 and S2 and the film F. Therefore, the stretchable laminate sheet L provided in the wearing article 300 has high air permeability. In addition, by providing sufficient openings in the stretchable laminate sheet L, a stretchable laminate sheet L having high stretchability can be obtained, and by using the stretchable laminate sheet L, an effect of realizing a wearing article 300 that is easy to fit the wearer can be obtained.

[0055] Fig.17 The wearing article 400 is shown as an example. Figure 4The wearing article 200 shown in the figure has a front body part 410, a back body part 420, a crotch part 430 and an absorbent article 440. The crotch part 430 and the absorbent article 440 are examples of absorbent bodies in the claims. Furthermore, the wearing article 400 has a fastening tape 450 as an example of a fastening member.

[0056] The front body part 410 and the back body part 420 are examples of waist members disposed on the waist of the wearer. In the wearing article 400, a gap is provided between the front body part 410 and the back body part 420. When the wearing article 400 is worn, the front body part 410 and the back body part 420 face each other.

[0057] The front body portion 410 and the rear body portion 420 include waist circumference portions 412 and 422 ( Fig.17 The shaded portion of the straight line in the upper right center) and the lower waistline 414, 424 ( Fig.17 ). The waistline portion 412 is a portion that is disposed at the upper end of the front torso portion 410 when worn, and is disposed at the waistline (height position near the waistbone) of the wearer's front torso. The waistline portion 422 is a portion that is disposed at the upper end of the rear torso portion 420 when worn, and is disposed at the waistline (near the waistbone) of the wearer's rear torso. The lower waistline portion 414 is a portion that is disposed below the waistline portion 412 when worn, and covers the lower part of the waist of the wearer's front torso. The lower waistline portion 424 is a portion that is disposed below the waistline portion 422 when worn, and covers the lower part of the waist of the wearer's rear torso.

[0058] A crotch portion 430 is attached to the center of the lower waist portions 414, 424 in the left-right direction (width direction) in a manner perpendicular to the lower waist portions 414, 424 and in a manner spanning the lower waist portions 414, 424. That is, the crotch portion 430 is connected to the front body portion 410 and the rear body portion 420. In other words, the front body portion 410 and the rear body portion 420 are connected via the crotch portion 430.

[0059] The crotch portion 430 is disposed in the crotch of the wearer when the wearing article 400 is worn. The absorbent article 440 is disposed in the center of the crotch portion 430 so as to overlap with the crotch portion 430 and is disposed in the crotch of the wearer together with the crotch portion 430 when the wearing article 400 is worn.

[0060] The crotch portion 430 is a member different from the front body portion 410 and the back body portion 420, and they can be joined to form the wearing article 400. The front body portion 410, the back body portion 420, and the crotch portion 430 may be formed integrally (from the same material).

[0061] At both ends of the front body 410 in the width direction (left-right direction), there are provided mounting portions 416 ( Fig.17 ). In addition, the mounting portion 416 herein refers not only to the portion where the fastening belt 450 is mounted, but also includes the portion around the portion where the fastening belt 450 is mounted.

[0062] The fastening belt 450 includes a hook portion 452 and a connecting portion 454 ( Fig.17 The hook portion 452 is provided with a hook-shaped protrusion, one end side of the connecting portion 454 is mounted to the mounting portion 416, and the other end side is provided with the hook portion 452. When the wearer wears the wearing article 400, the hook portion 452 of the fastening belt 450 is connected to the buckle portion (connected portion) 426 ( Fig.17 In addition, the buckle portion 426 is provided with a plurality of hook-shaped protrusions or annular protrusions for hooking the hook portion 452. In addition, the buckle portion 426 may be a member different from the rear body portion 420, or may be formed by processing the rear body portion 420.

[0063] The stretchable laminate sheet L manufactured by the manufacturing method of the present disclosure is used in the waist circumference portion 412 and / or the lower waist portion 414 of the front body portion 410, and / or the waist circumference portion 422 and / or the lower waist portion 424 of the back body portion 420 in the wearing article 400. In addition or in lieu thereof, the stretchable laminate sheet L is used in the attachment portion (connection member attachment portion) 416 of the front body portion 410 and / or the buckle portion (connected portion) 426 of the back body portion 420. In addition or in lieu thereof, the stretchable laminate sheet L is used in the connection portion 454 of the fastening belt 450.

[0064] By using the stretchable laminate sheet L in this way, it is possible to realize a wearing article 400 having good air permeability also in the stretchable laminate sheet L portion. In addition, the stretchable laminate sheet L manufactured by the manufacturing method of the present disclosure has openings Op1 formed at the joining portion J in addition to around the joining portion J of the pair of nonwoven fabric sheets S1 and S2 and the film F. Therefore, the stretchable laminate sheet L provided in the wearing article 400 has high air permeability. In addition, by providing sufficient openings in the stretchable laminate sheet L, it is possible to obtain a stretchable laminate sheet L having high elasticity, and by using the stretchable laminate sheet L, it is possible to obtain an effect of realizing a wearing article 400 that is easy to fit the wearer.

[0065] (1-2) Manufacturing device for telescopic laminated sheet

[0066] In summary, the manufacturing apparatus 100 is the following apparatus.

[0067] The manufacturing device 100 manufactures a stretchable film F from a raw material. The manufacturing device 100 conveys the manufactured film F in a stretched state. Then, the manufacturing device 100 merges a pair of nonwoven fabric sheets S1 and S2 with the conveyed film F, and heat-seals the pair of nonwoven fabric sheets S1 and S2 and the film F while the stretched film F is arranged between the pair of nonwoven fabric sheets S1 and S2, thereby forming a stretchable laminated sheet L. In other words, the manufacturing device 100 merges the nonwoven fabric sheets S1 and S2 with the conveyed film F, and heat-seals the nonwoven fabric sheets S1 and S2 and the film F while the stretched film F and the nonwoven fabric sheets S1 and S2 are overlapped, thereby forming a stretchable laminated sheet L. Then, in order to improve the air permeability of the stretch laminate sheet L (specifically, the air permeability of the film F of the stretch laminate sheet L), the manufacturing device 100 stretches the stretch laminate sheet L using the gear rollers 62 and 64 (gear stretching).

[0068] Details of the structure and the like of the manufacturing apparatus 100 will be described later.

[0069] (2) Details of the manufacturing apparatus for the stretchable laminated sheet

[0070] Regarding the manufacturing device 100 of the stretchable laminate sheet L, Figure 1 to Figure 4 Based on Figure 5 Further details are given. Figure 5 This is a control block diagram of the manufacturing apparatus 100 of the stretchable laminated sheet L according to the first embodiment.

[0071] like Figure 1 as well as Figure 5 As shown, the manufacturing apparatus 100 mainly includes a discharge mechanism 20 , a cooling roller 30 , a film stretching mechanism 38 , a stacking and bonding mechanism 48 , a stacked sheet stretching mechanism 60 , and a control device 90 .

[0072] (2-1) Discharge mechanism

[0073] The discharge mechanism 20 is a device for forming a thin film intermediate Fa from a raw material (resin material). The intermediate Fa is finally formed into a film F. Specifically, the discharge mechanism 20 heats the resin material to a temperature higher than the temperature range of elastic deformation of the resin material to melt it, and discharges the molten resin material from the discharge port 24 in a thin film to form the thin film intermediate Fa. Figure 1 As shown, the intermediate product Fa on the film formed by the discharge mechanism 20 is conveyed to the cooling roller 30 arranged below the discharge mechanism 20 .

[0074] In addition, the resin material is a material having a thermoplastic elastic resin as a main component, and is a material that exhibits elasticity at room temperature. For example, although not limited, as described in Patent Document 1 (International Publication No. 2019 / 150801), the resin material can use any of the thermoplastic elastomers specified in JIS K 6418:2007 (ISO 18064:2003).

[0075] (2-2) Cooling roller

[0076] The cooling roller 30 is a device for cooling and solidifying the intermediate material Fa to form a thin film F having elasticity (having stretchability).

[0077] The cooling roller 30 is driven to rotate by a driving device such as a motor (not shown). A flow path (not shown) through which a fluid for cooling the intermediate Fa flows is formed inside the cooling roller 30 .

[0078] As described above, the intermediate product Fa discharged from the discharge mechanism 20 is supplied to the cooling roller 30. In addition, the intermediate product Fa discharged from the discharge port 24 of the discharge mechanism 20 is supplied to the cooling roller 30 in the first section 80 (see Figure 1 To achieve this, the cooling roller 30 rotates at a circumferential speed greater than the feeding speed of the resin material when discharged from the discharge port 24 of the discharge mechanism 20, and the intermediate Fa is stretched until the thickness of the film-like intermediate Fa reaches a predetermined value.

[0079] In addition, the cooling roller 30 is driven to rotate by the driving device, and the intermediate Fa is conveyed along the outer peripheral surface of the cooling roller 30. In the second section 82 where the intermediate Fa contacts the outer peripheral surface of the cooling roller 30, the cooling roller 30 cools the intermediate Fa to a temperature region where the resin material constituting the intermediate Fa is elastically deformed and solidifies it. As a result, the intermediate Fa becomes a film F in the second section 82 and is pulled out from the cooling roller 30. The film F pulled out from the cooling roller 30 is sent to the film stretching mechanism 38 via the guide roller 32. The guide roller 32 may also have the function of cooling the film F like the cooling roller 30.

[0080] The film F conveyed from the cooling roller 30 to the film stretching mechanism 38 is conveyed in a state stretched by α% relative to the natural length of the film F (the length of the film F in a state where no force is applied).

[0081] (2-3) Film stretching mechanism

[0082] The film stretching mechanism 38 is a device for further stretching the film F conveyed from the cooling roller 30 in a stretched state.

[0083] The film stretching mechanism 38 mainly includes a drawing roller 34, a pinch roller 36, and an extension roller 40. The drawing roller 34 is driven to rotate by a driving device such as a motor (not shown). The extension roller 40 is driven to rotate by a driving device such as a motor (not shown).

[0084] The take-out roller 34 and the pinch roller 36 are disposed adjacent to each other. The take-out roller 34 and the pinch roller 36 sandwich the film F so that the film F conveyed from the cooling roller 30 to the take-out roller 34 does not slip along the outer peripheral surface of the take-out roller 34. The take-out roller 34 rotates synchronously with the cooling roller 30.

[0085] The film F is stretched in the third section 84 between the pull-out roller 34 and the pinch roller 36 and reaches the stretching roller 40 by the film stretching mechanism 38. To achieve this, the stretching roller 40 rotates at a circumferential speed faster than the circumferential speed of the pull-out roller 34, so that the film F is stretched by β% relative to the natural length of the film F (the length of the film F in a state where no force is applied). β% is a value greater than the aforementioned α%. The film F stretched by β% relative to the natural length of the film F is conveyed along the outer peripheral surface of the stretching roller 40.

[0086] (2-4) Stacking bonding mechanism

[0087] The lamination joining mechanism 48 forms a laminated body B in which the nonwoven fabric sheets S1 and S2 and the film F in a stretched state are overlapped. In particular, in the present embodiment, the lamination joining mechanism 48 forms a laminated body B in which the film F in a stretched state is arranged between a pair of nonwoven fabric sheets S1 and S2. Furthermore, the lamination joining mechanism 48 functions as a joining portion in the claims, and in the laminated body B, the nonwoven fabric sheets S1 and S2 and the film F are heat-fused to form a stretchable laminated sheet L. In particular, in the present embodiment, the lamination joining mechanism 48 functions as a joining portion in the claims, and in the laminated body B, the pair of nonwoven fabric sheets S1 and S2 and the film F arranged therebetween are heat-fused to form a stretchable laminated sheet L.

[0088] The stretching roller 40 which is a part of the structure of the film stretching mechanism 38 also functions as a part of the lamination bonding mechanism 48. In addition, the lamination bonding mechanism 48 has an ultrasonic bonding device 42.

[0089] The continuous first nonwoven fabric sheet S1 fed from a raw material roll (not shown) is supplied to the stretching roller 40 of the stacking and joining mechanism 48 via the guide roller 50. In addition, the continuous second nonwoven fabric sheet S2 fed from a raw material roll (not shown) is supplied to the stretching roller 40 via the guide rollers 52 and 54. In the stacking and joining mechanism 48, the stretched film F conveyed along the stretching roller 40 is sandwiched between the first nonwoven fabric sheet S1 and the second nonwoven fabric sheet S2 conveyed by the stretching roller 40, thereby forming a stacked body B in which the stretched film F is arranged between the pair of nonwoven fabric sheets S1 and S2.

[0090] In addition, when the stretchable laminated sheet L has a two-layer structure, for example, the continuous first nonwoven fabric sheet S1 fed from a raw material roll (not shown) is supplied to the stretching roller 40 of the laminated joint mechanism 48 via the guide roller 50. Then, in the laminated joint mechanism 48, a laminated body B is formed in which the stretched film F conveyed along the stretching roller 40 overlaps with the first nonwoven fabric sheet S1 conveyed by the stretching roller 40.

[0091] The laminate B moves with the rotation of the stretching roller 40 and passes between the stretching roller 40 functioning as an anvil roller and the horn 43 of the ultrasonic bonding device 42. A plurality of convex portions 40a are provided on the surface of the stretching roller 40, and the plurality of convex portions 40a are arranged along the rotation axis direction of the stretching roller 40 and along the circumferential direction of the stretching roller 40 (see Figure 6 ). Although the shape is not limited, the convex portion 40a has a rectangular shape or an oblong shape extending in the direction of the rotation axis of the extension roller 40 as the longitudinal direction when the convex portion 40a is viewed in the radial direction toward the rotation axis of the extension roller 40. However, the shape of the convex portion 40a described here is only an example, and other shapes may be used.

[0092] The stretching roller 40 and the welding head 43 are an example of the first joining member and the second joining member in the claims. The welding head 43 vibrates by an ultrasonic oscillator (not shown) while sandwiching the laminate B between the stretching roller 40 (more specifically, between the convex portion 40a of the stretching roller 40), thereby ultrasonically welding the non-woven fabric sheets S1, S2 (especially a pair of non-woven fabric sheets S1, S2 here) and the film F. Ultrasonic welding is a type of thermal welding. By ultrasonically welding a pair of non-woven fabric sheets S1, S2 and the film F, a stretchable laminate sheet L in which a pair of non-woven fabric sheets S1, S2 and the film F are intermittently joined at the joining portion J is formed and pulled out from the stacking joining mechanism 48. For example Figure 7 As shown, a joint portion J (a dotted portion) is partially arranged on the stretchable laminated sheet L. The stretchable laminated sheet L pulled out from the laminated joint mechanism 48 is conveyed to the laminated sheet stretching mechanism 60 in the conveying direction A along the stretching direction of the film F.

[0093] As described above, the lamination joining mechanism 48 as an example of a joining section here ultrasonically welds the nonwoven fabric sheets S1, S2 and the film F. However, the heat welding method is not limited to ultrasonic welding. For example, the lamination joining mechanism 48 may sandwich the laminate B using two rollers equipped with a heater inside, and Figure 7 In this way, the nonwoven fabric sheets S1, S2 and the film F are heat-sealed.

[0094] Here, as described above, the stretching roller 40 as a part of the film stretching mechanism 38 also functions as an anvil roller in the laminated bonding mechanism 48. However, the laminated bonding mechanism 48 is not limited thereto, and the laminated bonding mechanism 48 may have an anvil roller different from the stretching roller 40 for forming the laminated body B.

[0095] (2-5) Laminated Sheet Extension Mechanism

[0096] The laminated sheet stretching mechanism 60 is an example of a stretching unit in the claims, and the laminated sheet stretching mechanism 60 stretches the stretchable laminated sheet L using the gear rollers 62 and 64 (gear stretching).

[0097] Specifically, the laminated sheet stretching mechanism 60 has a pair of gear rollers 62 and 64 having concavoconvex shapes on the circumferential surface. More specifically, on the gear roller 62, like a spur gear, a plurality of teeth 62a and tooth grooves 62b are alternately provided along the circumference of the gear roller 62. The gear roller 64 is also like a spur gear, and a plurality of teeth 64a and tooth grooves 64b are alternately provided along the circumference of the gear roller 64. In addition, the gear rollers 62 and 64 are rotated by a driving mechanism such as a motor (not shown), so that the teeth 62a of the gear roller 62 and the tooth grooves 64b of the gear roller 64 are meshed with each other, or the tooth grooves 62b of the gear roller 62 and the teeth 64a of the gear roller 64 are meshed with each other.

[0098] The stretchable laminated sheet L conveyed from the laminated joint mechanism 48 along the conveying direction A is supplied to the meshing portion of the gear roller 62 and the gear roller 64 and stretched. As a result of the stretchable laminated sheet L being stretched by the laminated sheet stretching mechanism 60, the film F is stretched by γ% relative to the natural length of the film F (the length of the film F in a state where no force is applied). The stretchable laminated sheet L stretched by the laminated sheet stretching mechanism 60 (the stretchable laminated sheet L in which the film F constituting the stretchable laminated sheet L is stretched by γ% relative to the natural length of the film F) is conveyed by the conveying mechanism 70 on the downstream side while maintaining the elongation, and is conveyed to the next process (the manufacturing process of the wearing article, which is omitted from the illustration and description).

[0099] In addition, although not limited, γ% is a value greater than the above β%. That is, the film F (including the film F included in the telescopic laminated sheet L) can be stretched by the elongation rates α%, β (> α)%, and γ (> β)% respectively relative to the natural length of the film F through the second section 82, the third section 84, and the laminated sheet stretching mechanism 60. In other words, here, the laminated sheet stretching mechanism 60 is used to stretch the film F to a greater extent relative to the natural length, but since the film F here is in a state of being reinforced by being joined to the non-woven fabric sheets S1 and S2, it is easy to suppress the breakage of the film F even if it is stretched to a greater extent.

[0100] The stretchable laminated sheet L is stretched by the laminated sheet stretching mechanism 60 to form openings of sufficient area at the heat-sealed portions of the nonwoven fabric sheets S1 and S2 and the film F and / or their peripheries, thereby manufacturing a stretchable laminated sheet L with good air permeability.

[0101] Specifically, if the telescopic laminated sheet L is stretched along the conveying direction A before being stretched by the laminated sheet stretching mechanism 60, the film F is cut around the joint J (the dotted portion) of the telescopic laminated sheet L. Figure 8 As shown in FIG. 1 , an opening Op is formed around the joint J. However, Fig.10 As can be seen from the photograph, this opening Op is relatively small, and it may not be possible to ensure an opening Op of a sufficient area while ensuring the air permeability of the stretch laminate sheet L.

[0102] On the other hand, by extending the laminated sheet body by using the laminated sheet body extending mechanism 60, for example, the film F is also cut at a part of the joint J of the telescopic laminated sheet body L, such as Figure 8 As shown in FIG. 1 , in addition to the opening Op around the joint J, the film F is also cut at the joint J (the dotted portion) of the stretchable laminate sheet L to form an opening Op1. As a result, if the stretchable laminate sheet L is stretched in the conveying direction A, Figure 8 As shown, a relatively large opening is formed in the telescopic laminated sheet L. In addition, the opening formed by extending the laminated sheet extending mechanism 60 is not limited to the joint portion J, and may be formed around the joint portion J (the opening Op is formed larger). In this way, by gear-extending the telescopic laminated sheet L, good air permeability of the telescopic laminated sheet L (the film F of the telescopic laminated sheet L) can be achieved.

[0103] in addition, Figure 8 , 9 It is just a drawing for illustration. Figure 8 , 9 The shapes and sizes of the openings Op and Op1 shown do not limit the shapes of the openings to be actually formed.

[0104] In addition, in the laminated sheet stretching mechanism 60, when the stretchable laminated sheet L made of nonwoven fabric and thermoplastic elastic resin is sandwiched between the metal gear rollers 62 and 64, the stretchable laminated sheet L may be charged with static electricity. If the stretchable laminated sheet L is charged with static electricity, the static electricity may adversely affect the process of processing the stretchable laminated sheet L to manufacture the wearing article. Therefore, it is preferable that the stretchable laminated sheet L is brought into contact with a grounded conductor on the downstream side of the laminated sheet stretching mechanism 60 in the conveying direction A of the stretchable laminated sheet L.

[0105] (2-6) Control device

[0106] The control device 90 includes a CPU (not shown), memories such as ROM and RAM, input / output devices, various electrical components and electronic components, and the like.

[0107] like Figure 5 As shown, the control device 90 is electrically connected to the discharge mechanism 20, the cooling roller 30, the film stretching mechanism 38, the stacking bonding mechanism 48, and the stacking sheet stretching mechanism 60. The control device 90 controls the discharge mechanism 20, the cooling roller 30, the film stretching mechanism 38, the stacking bonding mechanism 48, and the stacking sheet stretching mechanism 60 by the CPU executing the program stored in the memory so that the discharge mechanism 20, the cooling roller 30, the film stretching mechanism 38, the stacking bonding mechanism 48, and the stacking sheet stretching mechanism 60 work in coordination.

[0108] In addition, as long as the control device 90 can perform the functions described here, it can be implemented by software, it can be implemented by hardware (various electric circuits / electronic circuits), or it can be implemented by the cooperation of software and hardware.

[0109] (3) Method for manufacturing a telescopic laminated sheet

[0110] A method for producing the stretchable laminate sheet L will be described.

[0111] First, the formation of the thin film F will be described.

[0112] In the discharge mechanism 20, for example, a resin material that exhibits elasticity at room temperature is heated and melted, and discharged from the discharge port 24 as a film-like intermediate Fa. Then, the intermediate Fa is cooled and solidified by the cooling roller 30 to form an elastic (stretchable) film F. In other words, here, the discharge mechanism 20 and the cooling roller 30 function as a molding unit in the claims, and the film F is formed from the resin material as a raw material. In addition, at the cooling roller 30, the film F is stretched to a state of being stretched by α% relative to the natural length of the film F (the length of the film F in a state where no force is applied).

[0113] The film F pulled out from the cooling roller 30 and conveyed from the cooling roller 30 in an extended state is further extended by the film extending mechanism 38. Specifically, in the film extending mechanism 38, the film F is extended by β (> α) % relative to the natural length of the film F.

[0114] In addition, in the laminating and joining mechanism 48, a laminated body B is formed in which the nonwoven fabric sheets S1 and S2 fed from a raw material roll (not shown) and the film F in a stretched state overlap. In particular, in the present embodiment, in the laminating and joining mechanism 48, a laminated body B is formed in which the film F in a stretched state is arranged between the first nonwoven fabric sheet S1 fed from a raw material roll (not shown) and the second nonwoven fabric sheet S2 fed from a raw material roll (not shown). Then, the laminating and joining mechanism 48 sandwiches the laminated body B between the stretching roller 40 and the welding head 43 of the ultrasonic joining device 42, and heat-seals the pair of nonwoven fabric sheets S1 and S2 and the film F to form a stretchable laminated sheet L.

[0115] Next, the laminated sheet extension mechanism 60 extends (gear extension) the telescopic laminated sheet L conveyed from the laminated joint mechanism 48 along the conveying direction A and passed between a pair of gear rollers 62 and 64. Specifically, the laminated sheet extension mechanism 60 extends the film F to a state where the film F is elongated by γ% relative to the natural length. For example, γ% is a value greater than the above-mentioned β%. As a result of the gear extension, an opening of sufficient area is formed at the heat-fused portion of the telescopic laminated sheet L, the nonwoven fabric sheets S1, S2 and the film F and / or its periphery.

[0116] (4) Features

[0117] (4-1)

[0118] The manufacturing device 100 of the stretchable laminated sheet L is a manufacturing device 100 of the stretchable laminated sheet L formed by overlapping and arranging nonwoven fabric sheets S1 and S2 as an example of a substrate sheet and a stretchable film F, and joining the nonwoven fabric sheets S1 and S2 and the film F. The manufacturing device 100 of the stretchable laminated sheet L includes a stacking joint mechanism 48 as an example of a joining portion and a stacking sheet extension mechanism 60 as an example of an extension portion. The stacking joint mechanism 48 includes an extension roller 40 (anvil roller) as an example of a first joining member and a second joining member, and a welding head 43. The stacking joint mechanism 48 sandwiches a stacked body B formed by overlapping nonwoven fabric sheets S1 and S2 and a film F in an extended state between the extension roller 40 and the welding head 43, and heat-seals the nonwoven fabric sheets S1 and S2 and the film F to form the stretchable laminated sheet L. The laminated sheet stretching mechanism 60 includes a pair of gear rollers 62 and 64 having concavoconvex shapes on the peripheral surfaces. The laminated sheet stretching mechanism 60 stretches the stretchable laminated sheet L conveyed by passing between the pair of gear rollers 62 and 64 .

[0119] In the manufacturing device 100 for the stretchable laminate sheet L, after the stretchable laminate sheet L is formed by heat-melting the non-woven fabric sheets S1, S2 and the film F, stretching processing is performed using gear rollers 62, 64 having projections and depressions on the peripheral surface, thereby forming openings of sufficient area at the heat-melted portions and / or their peripheries of the non-woven fabric sheets S1, S2 and the film F, thereby manufacturing a stretchable laminate sheet L with good air permeability.

[0120] (4-2)

[0121] The manufacturing device 100 of the telescopic laminated sheet L includes a discharge mechanism 20 and a cooling roller 30 functioning as a molding unit, and a film stretching mechanism 38 as an example of a film stretching unit. The molding unit molds a film F from a raw material (resin material). The film stretching mechanism 38 is arranged between the molding unit and the laminating and bonding mechanism 48 in the conveying direction A of the film F, and stretches the film F. The elongation of the film F conveyed between the film stretching mechanism 38 and the laminating and bonding mechanism 48 relative to the natural length of the film F is greater than the elongation of the film F conveyed between the molding unit and the film stretching mechanism 38 relative to the natural length of the film F. In addition, the elongation of the film F of the telescopic laminated sheet L in the laminating and bonding mechanism 60 relative to the natural length of the film F is greater than the elongation of the film F conveyed between the film stretching mechanism 38 and the laminating and bonding mechanism 48 relative to the natural length of the film F.

[0122] In the manufacturing device 100 of the stretchable laminated sheet L, the film F can be made thinner by stretching the film F in stages. In particular, in the manufacturing device 100 of the stretchable laminated sheet L, after the stretchable laminated sheet L is formed using the film F, the film F can be further stretched to suppress the breakage of the film F and to reduce the film thickness.

[0123] (4-3)

[0124] The method for manufacturing the stretchable laminated sheet L is a method for manufacturing the stretchable laminated sheet L by overlapping and arranging nonwoven fabric sheets S1 and S2 as an example of a substrate sheet and a stretchable film F, and bonding the nonwoven fabric sheets S1 and S2 and the film F. The method for manufacturing the stretchable laminated sheet L includes a welding step and a stretching step. In the welding step, the nonwoven fabric sheets S1 and S2 and the film F in a stretched state are heat-fused to form the stretchable laminated sheet L. In the stretching step, the stretchable laminated sheet L conveyed between the pair of gear rollers 62 and 64 having concavoconvex surfaces is stretched by a pair of gear rollers 62 and 64.

[0125] In the manufacturing method of the stretch laminate sheet L, on the basis of forming the stretch laminate sheet L by heat-melting the non-woven fabric sheets S1, S2 and the film F, stretching processing is performed using gear rollers 62, 64 having projections and depressions on the peripheral surface, so that openings of sufficient area are formed at the heat-melted parts and / or their peripheries of the non-woven fabric sheets S1, S2 and the film F, thereby manufacturing a stretch laminate sheet L with good air permeability.

[0126] <Second embodiment>

[0127] Below, refer to Figure 12-13 A manufacturing apparatus 100A of the stretchable laminate sheet L according to the second embodiment will be described. Fig.12 It is a schematic diagram showing the structure of a manufacturing apparatus 100A for a stretchable laminate sheet L, and the depiction of a molding unit for the film F (discharging mechanism 20, cooling roller 30, etc.) is omitted. Fig.13 This is an example of a control block diagram of the manufacturing device 100A of the telescopic laminated sheet body L.

[0128] In addition, the manufacturing apparatus 100A of the second embodiment is mainly different from the manufacturing apparatus 100 of the first embodiment in the following configurations a to c. In addition, the manufacturing apparatus 100A does not need to have all of the configurations a to c. The manufacturing apparatus 100A may have any one of the configurations a to c, or two of the configurations a to c.

[0129] · Configuration a: On the conveying path of the telescopic stacking sheet L, between the stacking joint mechanism 48 and the stacking sheet extending mechanism 60, there is provided an adjusting unit 110 for adjusting the conveying speed of the telescopic stacking sheet L supplied to the stacking sheet extending mechanism 60, and the control device 90 acts as a speed control unit for controlling the operation of the adjusting unit 110.

[0130] · Configuration b: A heater 66 for heating at least one of the pair of gear rollers 62 and 64 is provided (in the present embodiment, at least the gear roller 64 is provided with the heater 66 ).

[0131] · Configuration c: The manufacturing device 100A has a receiving unit 92 that receives information related to the size of the opening formed by the stacked sheet stretching mechanism 60 in the telescopic stacked sheet L. The control device 90 determines the settings of the gear rollers 62 and 64 in the stacked sheet stretching mechanism 60 based on the information.

[0132] Here, only the differences between the manufacturing device 100A of the second embodiment and the manufacturing device 100 of the first embodiment, namely, the configurations a to c, are described, and the description of the same points is omitted when it is not necessary. In addition, the telescopic laminated sheet body L manufactured by the manufacturing device 100A is the same as the telescopic laminated sheet body L manufactured by the manufacturing device 100, so the description of the telescopic laminated sheet body L is also omitted here.

[0133] (1) Details of components a to c

[0134] (1-1) constitute a

[0135] The above-mentioned configuration a will be described.

[0136] First, the reason for setting structure a is explained.

[0137] As described in the first embodiment, the stretchable stacked sheet L formed by the stacked joint mechanism 48 is stretched by the gears in the stacked sheet stretching mechanism 60 to form an opening.

[0138] The size of the opening formed in the laminated sheet extension mechanism 60 varies according to the extent to which the telescopic laminated sheet L is extended by the laminated sheet extension mechanism 60. Moreover, the extent to which the telescopic laminated sheet L is extended in the laminated sheet extension mechanism 60 also varies according to the extent to which tension acts on the telescopic laminated sheet L supplied to the laminated sheet extension mechanism 60. Specifically, even if the operating conditions of the laminated sheet extension mechanism 60 are not particularly changed, a relatively large opening is easily formed in the telescopic laminated sheet L when a relatively large tension acts on the telescopic laminated sheet L supplied to the laminated sheet extension mechanism 60; and only a relatively small opening is formed in the telescopic laminated sheet L when only a relatively small tension acts on the telescopic laminated sheet L supplied to the laminated sheet extension mechanism 60.

[0139] Furthermore, when excessive tension acts on the telescopic stacked sheet L supplied to the stacked sheet stretching mechanism 60 , the telescopic stacked sheet L may be damaged when being stretched by the stacked sheet stretching mechanism 60 .

[0140] Therefore, in order to form openings of substantially the same size throughout the telescopic laminated sheet L and suppress damage to the telescopic laminated sheet L, it is preferred that the tension acting on the telescopic laminated sheet L supplied to the laminated sheet stretching mechanism 60 is controlled to an appropriate value.

[0141] Moreover, since the tension acting on the telescopic stacking sheet L changes according to the conveying speed of the telescopic stacking sheet L supplied to the stacking sheet extending mechanism 60, in the manufacturing device 100A of the second embodiment, an adjustment unit 110 for adjusting the conveying speed of the telescopic stacking sheet L supplied to the stacking sheet extending mechanism 60 is provided between the stacking joint mechanism 48 and the stacking sheet extending mechanism 60.

[0142] The adjustment unit 110 mainly includes a speed adjustment roller 112 as an example of a second roller for winding the stretchable laminated sheet L, and a speed adjustment motor 114 for rotationally driving the speed adjustment roller 112 (see Fig.12 as well as Fig.13 ). The speed adjustment motor 114 is electrically connected to the control device 90, and the operation (run / stop, rotation speed, etc.) of the speed adjustment motor 114 is controlled by the control device 90. The speed adjustment roller 112 is a roller having a relatively large adhesion or friction coefficient on the outer surface on which the telescopic laminated sheet L is wound. Specifically, the adhesion or friction coefficient on the outer surface of the speed adjustment roller 112 is greater than the adhesion or friction coefficient on the outer surface of the guide roller 120, which is an example of a first roller, on which the telescopic laminated sheet L is wound. In addition, the guide roller 120 is a roller that is arranged between the stacking joint mechanism 48 and the adjustment section 110 on the conveying path of the telescopic laminated sheet L, and guides the wound telescopic laminated sheet L. The roller is, for example, a freely rotating roller.

[0143] The adhesiveness of the outer surface of the speed adjustment roller 112 is achieved, for example, by attaching an adhesive material such as rubber to the outer surface of the speed adjustment roller 112. In addition, the relatively large friction coefficient of the outer surface of the speed adjustment roller 112 is achieved, for example, by attaching a member with a large friction coefficient to the outer surface of the speed adjustment roller 112, or by roughening the outer surface of the speed adjustment roller 112.

[0144] The adjustment section 110 changes the speed of the speed adjustment roller 112 having an outer surface with adhesiveness or a relatively large friction coefficient, thereby changing the conveying speed of the telescopic stacked sheet L in the adjustment section 110. As a result, the conveying speed of the telescopic stacked sheet L supplied to the stacked sheet stretching mechanism 60 is changed.

[0145] In addition, the adjustment unit 110 may adjust the conveying speed of the stretchable laminated sheet L by sandwiching the stretchable laminated sheet L with two rollers instead of using a single speed adjustment roller 112 .

[0146] The following describes how the conveying speed of the telescopic stacked sheet L supplied to the stacked sheet stretching mechanism 60 is adjusted by the adjustment unit 110 and how the tension acting on the telescopic stacked sheet L supplied to the stacked sheet stretching mechanism 60 is adjusted as a result.

[0147] For example, it is assumed that the conveyance mechanism 70 conveys the stretchable laminated sheet L at a conveyance speed V, and the adjustment unit 110 also conveys the stretchable laminated sheet L at a conveyance speed V.

[0148] Under this condition, it is assumed that the conveying speed V of the telescopic laminated sheet L by the conveying mechanism 70 is not changed, but the rotation speed of the speed adjustment motor 114 is reduced, thereby reducing the rotation speed of the speed adjustment roller 112. In this case, since the adjustment section 110 conveys the telescopic laminated sheet L at a relatively low speed, and the conveying mechanism 70 conveys the telescopic laminated sheet L at a relatively high speed, the tension acting on the telescopic laminated sheet L between the adjustment section 110 and the conveying mechanism 70 becomes large. As a result, the tension acting on the telescopic laminated sheet L supplied to the laminated sheet stretching mechanism 60 becomes smaller than the tension acting on the telescopic laminated sheet L conveyed from the laminated joint mechanism 48 to the adjustment section 110.

[0149] On the contrary, it is assumed that under the condition that the conveying mechanism 70 conveys the telescopic laminated sheet L at the conveying speed V and the adjusting section 110 also conveys the telescopic laminated sheet L at the conveying speed V, the conveying speed V of the telescopic laminated sheet L by the conveying mechanism 70 is not changed, but the rotation speed of the speed adjustment motor 114 is increased, and the rotation speed of the speed adjustment roller 112 is increased. In this case, since the adjusting section 110 conveys the telescopic laminated sheet L at a relatively high speed and the conveying mechanism 70 conveys the telescopic laminated sheet L at a relatively low speed, the tension acting on the telescopic laminated sheet L between the adjusting section 110 and the conveying mechanism 70 becomes smaller. As a result, the tension acting on the telescopic laminated sheet L supplied to the laminated sheet stretching mechanism 60 becomes larger than the tension acting on the telescopic laminated sheet L conveyed from the laminated joint mechanism 48 to the adjusting section 110.

[0150] A description will be given of a control mode of the tension acting on the stretchable stacked sheet L supplied to the stacked sheet stretching mechanism 60 during the operation of the manufacturing apparatus 100A.

[0151] First, at the start of the manufacturing device 100A operation or the stop of the manufacturing device 100A operation, the conveying speed of the film F and the telescopic laminated sheet L is slower than that of the stable operation. In addition, the stable operation refers to a state in which the conveying speed of the film F and the telescopic laminated sheet L becomes a constant speed after a predetermined period of time has passed since the start of the operation of the manufacturing device 100A. Therefore, at the start of the manufacturing device 100A operation or the stop of the manufacturing device 100A operation, the tension acting on the telescopic laminated sheet L supplied to the laminated sheet stretching mechanism 60 becomes smaller, and there is a possibility that only a relatively small opening is formed in the telescopic laminated sheet L.

[0152] Therefore, preferably, the control device 90 serving as the speed control unit controls the action of the adjustment unit 110 (more specifically, the action of the speed adjustment motor 114) when the operation starts or stops, so as to slow down the conveying speed of the telescopic stacking sheet L in the adjustment unit 110, thereby increasing the tension acting on the telescopic stacking sheet L supplied to the stacking sheet extending mechanism 60 relative to the tension acting on the telescopic stacking sheet L conveyed from the stacking joint mechanism 48 to the adjustment unit 110.

[0153] On the other hand, since the conveying speed of the film F and the telescopic stacking sheet L becomes relatively large during the stable operation of the manufacturing device 100A, the tension acting on the telescopic stacking sheet L supplied to the stacking sheet extending mechanism 60 becomes excessively large, so that the opening formed in the telescopic stacking sheet L may become too large, or the telescopic stacking sheet L may be damaged.

[0154] Therefore, preferably, the control device 90 serving as the speed control unit controls the action of the adjustment unit 110 (more specifically, the action of the speed adjustment motor 114) when the operation starts or stops, so that the conveying speed of the telescopic stacking sheet L in the adjustment unit 110 becomes faster, thereby making the tension acting on the telescopic stacking sheet L supplied to the stacking sheet extending mechanism 60 smaller than the tension acting on the telescopic stacking sheet L conveyed from the stacking joint mechanism 48 to the adjustment unit 110.

[0155] In addition, preferably, the control device 90 as the speed control unit controls the operation of the adjustment unit 110 (more specifically, the operation of the speed adjustment motor 114) so ​​that the tension acting on the telescopic stacking sheet L supplied to the stacking sheet stretching mechanism 60 is always constant.

[0156] (1-2) constitute b

[0157] The above-mentioned configuration b will be described.

[0158] When the laminated sheet stretching mechanism 60 performs gear stretching, if the stretchable laminated sheet L is at a low temperature, the thermoplastic film F of the stretchable laminated sheet L may harden and become difficult to stretch.

[0159] Therefore, at least one of the pair of gear rollers 62 and 64 (in the present embodiment, at least the gear roller 64) is provided with a heater 66 for heating the gear rollers 62 and 64 to a predetermined temperature. By heating the gear rollers 62 and 64 with the heater 66, the stretchable laminated sheet L in contact with the gear rollers 62 and 64 is also heated, so that the stretchable laminated sheet L is easily stretched.

[0160] In addition, in order to make the stretchable laminated sheet L easy to be heated, it is preferred that the stretchable laminated sheet L is guided between the pair of gear rollers 62 and 64 after being in contact with the outer peripheral surface of one of the pair of gear rollers 62 and 64 (here, the gear roller 64) heated by the heater 66 for a predetermined length. Although the numerical value is not limited, the stretchable laminated sheet L is guided between the pair of gear rollers 62 and 64 after being in contact with the outer peripheral surface of the gear roller 64 for 5% or more of the outer circumference of the gear roller 64, for example.

[0161] In order to make the telescopic laminated sheet L contact the outer peripheral surface of the gear roller 64 before guiding the telescopic laminated sheet L between the pair of gear rollers 62 and 64, the telescopic laminated sheet L conveyed from the adjustment unit 110 (the telescopic laminated sheet L conveyed from the laminated sheet stretching mechanism 60 when the adjustment unit 110 is not provided) is not directly guided between the gear rollers 62 and 64. Specifically, Fig.12 As shown, the telescopic stacked sheet L transported from the adjustment section 110 (when the adjustment section 110 is not provided, the telescopic stacked sheet L transported from the stacked sheet extending mechanism 60) is guided by the guide roller 130, and the telescopic stacked sheet L is wound on the outer peripheral surface of the gear roller 64 and then guided between the gear rollers 62 and 64.

[0162] (1-3) constitutes c

[0163] The above-mentioned configuration c will be described.

[0164] First, the reason for setting the structure c is described.

[0165] The size of the opening required for the stretchable laminated sheet L is not always fixed, and may change depending on the wearing article 200, 300, 400, etc. using the stretchable laminated sheet L. In order to change the size of the opening formed in the stretchable laminated sheet L by the laminated sheet extension mechanism 60 according to the size of the opening required for the stretchable laminated sheet L, for example, it is preferable to change the settings of the gear rollers 62 and 64 of the laminated sheet extension mechanism 60. In addition, the settings of the gear rollers 62 and 64 are, for example, the tooth height of the gear rollers 62 and 64 (the distance from the tooth root to the tooth top, here, the distance between the vertex of the tooth portion 62a and the tooth groove portion 62b), and the distance between the axis of the gear roller 62 and the axis of the gear roller 64. If the tooth height of the gear rollers 62 and 64 increases, the size of the opening formed by the stacked sheet extending mechanism 60 in the telescopic stacked sheet L becomes larger; if the distance between the axis of the gear roller 62 and the axis of the gear roller 64 decreases, the size of the opening formed by the stacked sheet extending mechanism 60 in the telescopic stacked sheet L becomes larger.

[0166] However, the settings of the gear rollers 62 and 64 are not limited to the exemplified settings, and may be characteristics related to the characteristics of each gear roller 62 and 64 or the correlation between the gear rollers 62 and 64 that changes the extension amount of the telescopic laminated sheet L. The settings of the gear rollers 62 and 64 may be changed by the operator of the manufacturing device 100A through trial and error (Try and Error), but in this case, it may take time before the settings are changed.

[0167] Therefore, preferably, the control device 90 of the manufacturing apparatus 100A determines the setting of the gear rollers 62 and 64 in the laminated sheet extension mechanism 60 based on information related to the size of the opening formed by the laminated sheet extension mechanism 60 in the telescopic laminated sheet L. Therefore, the control device 90 of the manufacturing apparatus 100A has the above-mentioned configuration c.

[0168] The structure c will be described in detail.

[0169] The manufacturing device 100A has a receiving unit 92 that receives information related to the size of the opening formed by the stacked sheet extension mechanism 60 in the telescopic stacked sheet L. The receiving unit 92 is, for example, a switch or a touch screen that receives information input by an operator of the manufacturing device 100A. In addition, the receiving unit 92 may also be a communication device that receives information sent from a terminal operated by the operator of the manufacturing device 100A (for example, a computer that serves as a management device for managing the manufacturing device 100A, or a mobile terminal carried by the operator) via a network such as the Internet.

[0170] In addition, the information related to the size of the opening formed by the laminated sheet extension mechanism 60 in the telescopic laminated sheet L is, for example, a numerical value indicating the ratio of the desired opening size to the sealing area of ​​the nonwoven fabric sheets S1, S2 and the film F welded by the laminated joint mechanism 48. In addition, the information related to the size of the opening formed by the laminated sheet extension mechanism 60 in the telescopic laminated sheet L may be, for example, the numerical value of the desired opening size itself. In addition, the information related to the size of the opening formed by the laminated sheet extension mechanism 60 in the telescopic laminated sheet L may be, for example, a relative index indicating the desired opening size such as "large", "medium", or "small".

[0171] Moreover, the control device 90 of the manufacturing device 100A functions as a determination unit in the claim, and determines the settings of the gear rollers 62 and 64 in the stacking sheet extending mechanism 60 based on the information related to the size of the opening formed by the stacking sheet extending mechanism 60 in the telescopic stacking sheet L received by the receiving unit 92.

[0172] In order to achieve this, for example, in the memory of the control device 90, there is stored association information that associates the size of the opening formed by the stacked sheet extension mechanism 60 in the telescopic stacked sheet L with the settings of the gear rollers 62 and 64. The association information is information based on test results obtained by using a test device of the manufacturing device 100A to perform gear extension of the telescopic stacked sheet L while changing the settings of the gear rollers 62 and 64 and measuring the opening formed by the gear extension. In addition, the association information is information related to the correlation between the settings of the gear rollers 62 and 64 and the opening formed by the gear extension, which is obtained by theoretical calculation or computer simulation.

[0173] The control device 90 refers to the related information and determines the settings of the gear rollers 62 and 64 corresponding to the information on the size of the opening formed in the telescopic stacked sheet L by the stacked sheet stretching mechanism 60 received by the receiving unit 92 .

[0174] The manufacturing apparatus 100A has, for example, a display as the output unit 94, and the control device 90 displays the settings of the gear rollers 62 and 64 determined by itself on the display as the output unit 94. Alternatively, the manufacturing apparatus 100A has, for example, a communication device as the output unit 94, and the control device 90 can send the settings of the gear rollers 62 and 64 determined by itself to a terminal operated by an operator of the manufacturing apparatus 100A (for example, a computer as a management device that manages the manufacturing apparatus 100A, or a mobile terminal carried by the operator).

[0175] Through this configuration, the operator of the manufacturing device 100A can replace the gear rollers 62, 64 used in the stacked sheet stretching mechanism 60 or adjust the distance between the axis of the gear roller 62 and the axis of the gear roller 64 based on the settings of the gear rollers 62, 64 output from the output unit 94 by the control device 90.

[0176] (2) Features

[0177] The manufacturing apparatus 100A of the second embodiment has the following features in addition to the features described in (4) of the manufacturing apparatus 100 of the first embodiment.

[0178] (2-1)

[0179] The manufacturing device 100A of the telescopic laminated sheet L includes an adjustment unit 110 and a control device 90 as a speed control unit. The adjustment unit 110 is arranged between the stacking joint mechanism 48 and the laminated sheet stretching mechanism 60 on the conveying path of the telescopic laminated sheet L, and adjusts the conveying speed of the telescopic laminated sheet L supplied to the laminated sheet stretching mechanism 60. The control device 90 controls the operation of the adjustment unit 110.

[0180] In the manufacturing device 100A of the telescopic laminated sheet L, the conveying speed of the telescopic laminated sheet L supplied to the laminated sheet extending mechanism 60 is controlled, and as a result, the tension acting on the telescopic laminated sheet L supplied to the laminated sheet extending mechanism 60 is controlled. Therefore, it is possible to suppress the occurrence of an undesirable situation in which an excessive tension acts on the telescopic laminated sheet L in the laminated sheet extending mechanism 60 to damage the telescopic laminated sheet L, or the size of the opening formed in the telescopic laminated sheet L in the laminated sheet extending mechanism 60 deviates from a desired size.

[0181] (2-2)

[0182] In the manufacturing device 100A of the telescopic stacking sheet L, the control device 90 controls the action of the adjustment unit 110, for example during stable operation, so that the tension acting on the telescopic stacking sheet L supplied to the stacking sheet extending mechanism 60 becomes smaller than the tension acting on the telescopic stacking sheet L transported from the stacking joining mechanism 48 to the adjustment unit 110.

[0183] In the manufacturing apparatus 100A of the stretchable laminated sheet L, it is possible to suppress the occurrence of a problem in which excessive tension acts on the stretchable laminated sheet L in the laminated sheet stretching mechanism 60 during stable operation and the stretchable laminated sheet L is damaged.

[0184] (2-3)

[0185] In the manufacturing device 100A of the telescopic stacking sheet L, the control device 90 controls the action of the adjusting unit 110, for example when the operation starts or stops, so that the tension acting on the telescopic stacking sheet L supplied to the stacking sheet extending mechanism 60 becomes greater than the tension acting on the telescopic stacking sheet L transported from the stacking joining mechanism 48 to the adjusting unit 110.

[0186] Assume that the operation of the adjustment unit 110 is not controlled. When the operation of the manufacturing device 100A of the stretchable laminated sheet L starts or stops, the tension acting on the stretchable laminated sheet L supplied to the laminated sheet stretching mechanism 60 becomes smaller than that in the stable operation; the size of the opening formed in the stretchable laminated sheet L by the laminated sheet stretching mechanism 60 may become smaller than that in the stable operation. Since the desired air permeability cannot be obtained in the stretchable laminated sheet L when the opening is too small, the stretchable laminated sheet L in the portion with too small an opening may not be used for the wearable article (waste).

[0187] In contrast, since the manufacturing device 100A for the telescopic stacked sheet L controls the operation of the adjustment unit 110, the tension acting on the telescopic stacked sheet L supplied to the stacked sheet extending mechanism 60 becomes larger. Therefore, even when the operation of the manufacturing device 100A for the telescopic stacked sheet L starts or stops, an opening of an appropriate size can be formed in the stacked sheet extending mechanism 60 in the telescopic stacked sheet L.

[0188] (2-4)

[0189] In the manufacturing apparatus 100A of the stretchable laminated sheet L, the control device 90 controls the operation of the adjustment unit 110 so that the tension acting on the stretchable laminated sheet L supplied to the laminated sheet stretching mechanism 60 is constant.

[0190] In the manufacturing apparatus 100A of the stretchable laminated sheet L, since the tension acting on the stretchable laminated sheet L supplied to the laminated sheet stretching mechanism 60 is constant, it is easy to always form an opening of substantially the same size in the stretchable laminated sheet L.

[0191] (2-5)

[0192] The manufacturing device 100A of the telescopic laminated sheet L includes a guide roller 120 as an example of a first roller. The guide roller 120 is disposed between the stacking joint mechanism 48 and the adjustment unit 110 on the conveying path, and guides the telescopic laminated sheet L wound on the guide roller 120. The adjustment unit 110 includes a speed adjustment roller 112 as an example of a second roller wound on the telescopic laminated sheet L. The outer surface of the speed adjustment roller 112 has a greater adhesiveness or friction coefficient than the outer surface of the guide roller 120.

[0193] In the manufacturing device 100A of the stretchable laminated sheet L, the stretchable laminated sheet L is gripped on the outer surface of the speed adjustment roller 112 in the adjustment section 110, and the conveying speed of the stretchable laminated sheet L supplied to the laminated sheet stretching mechanism 60 can be adjusted using a single roller.

[0194] However, the adjustment unit 110 may adjust the conveying speed of the stretchable laminated sheet L by sandwiching the stretchable laminated sheet L with two rollers instead of using the single speed adjustment roller 112 .

[0195] (2-6)

[0196] The manufacturing apparatus 100A of the stretchable laminated sheet L includes a heater 66 that heats at least one of the pair of gear rollers 62 and 64. In the present embodiment, the manufacturing apparatus 100A of the stretchable laminated sheet L includes at least the heater 66 that heats the gear roller 64.

[0197] In the manufacturing apparatus 100A of the stretchable laminated sheet L, since the stretchable laminated sheet L can be stretched after heating the stretchable laminated sheet L, the stretchable laminated sheet L can be easily stretched in the laminated sheet stretching mechanism 60 .

[0198] (2-7)

[0199] In the manufacturing device 100A of the telescopic laminated sheet L, the telescopic laminated sheet L is guided between the pair of gear rollers 62 and 64 after being in contact with the outer peripheral surface of one of the pair of gear rollers 62 and 64 heated by the heater 66 for a predetermined length. In the present embodiment, the telescopic laminated sheet L is guided between the pair of gear rollers 62 and 64 after being in contact with the outer peripheral surface of one side of the gear roller 64 heated by the heater 66 for a predetermined length.

[0200] In the manufacturing apparatus 100A of the stretchable laminated sheet L, the stretchable laminated sheet L can be sufficiently heated easily, and in the laminated sheet stretching mechanism 60, the stretchable laminated sheet L can be sufficiently stretched easily.

[0201] (2-8)

[0202] The manufacturing device 100A of the telescopic laminated sheet L includes a receiving unit 92 and a control device 90. The receiving unit 92 receives information related to the size of the opening formed by the laminated sheet extending mechanism 60 in the telescopic laminated sheet L. The control device 90 determines the settings of the gear rollers 62 and 64 in the laminated sheet extending mechanism 60 based on the information related to the size of the opening formed by the laminated sheet extending mechanism 60 in the telescopic laminated sheet L.

[0203] In the manufacturing device 100A of the telescopic laminated sheet L, since the settings of the gear rollers 62 and 64 are determined according to the size of the opening provided in the telescopic laminated sheet L, it is easy to form an opening of a desired size in the telescopic laminated sheet L in the laminated sheet stretching mechanism 60.

[0204] <Variation 1>

[0205] The manufacturing apparatus 100A may have the following configuration instead of the above configuration c.

[0206] As a method of changing the size of the opening formed by the stacked sheet extending mechanism 60 in the telescopic stacked sheet L according to the size of the opening required by the telescopic stacked sheet L, a method of controlling the action of the adjustment unit 110 to change the tension acting on the telescopic stacked sheet L supplied to the stacked sheet extending mechanism 60 may also be considered, instead of changing the settings of the gear rollers 62 and 64 of the stacked sheet extending mechanism 60.

[0207] Therefore, the control device 90 may determine the control mode of the adjustment portion 110 according to the size of the opening required for the telescopic laminated sheet L instead of determining the settings of the gear rollers 62 and 64 .

[0208] An example of a specific configuration for realizing the manufacturing apparatus 100A according to the first modification will be described.

[0209] As in the above-described embodiment, the manufacturing device 100A of the first modification includes a receiving unit 92 for receiving information related to the size of the opening formed by the stacked sheet extension mechanism 60 in the telescopic stacked sheet L. The information related to the receiving unit 92 and the size of the opening formed by the stacked sheet extension mechanism 60 in the telescopic stacked sheet L has been described in the second embodiment, and thus the description thereof is omitted here.

[0210] The control device 90 of the manufacturing apparatus 100A determines the control mode of the adjustment unit 110 based on the information on the size of the opening formed in the telescopic stacked sheet L by the stacked sheet stretching mechanism 60 received by the receiving unit 92 .

[0211] For example, in the memory of the control device 90, there is stored association information associating the size of the opening formed by the stacked sheet extension mechanism 60 when the stacked sheet L is telescopically extended, and the control mode of the adjustment unit 110 (how to control the rotation speed of the speed adjustment motor 114 when the operation starts, when the operation stops, and when the operation is stable). The association information here is information based on test results, which are obtained by using a test device of the manufacturing device 100A to perform gear extension of the telescopic stacked sheet L while changing the control mode of the adjustment unit 110, and measuring the opening formed by the gear extension. In addition, the association information is information related to the correlation between the control mode of the adjustment unit 110 and the opening formed by the gear extension, which is obtained based on theoretical calculations or by computer simulation.

[0212] The control device 90 refers to the related information and determines the control mode of the adjustment unit 110 corresponding to the information on the size of the opening formed by the stacked sheet stretching mechanism 60 in the telescopic stacked sheet L received by the receiving unit 92 .

[0213] The manufacturing apparatus 100A may output the control mode of the adjustment unit 110 determined by itself from, for example, the output unit 94 (the description of the output unit 94 is omitted). Furthermore, the operator of the manufacturing apparatus 100A may input the control mode of the adjustment unit 110 to the control device 90. Furthermore, the control device 90 may control the operation of the adjustment unit 110 using the setting of the control mode of the adjustment unit 110 determined by itself during the operation of the manufacturing apparatus 100A.

[0214] In the manufacturing apparatus 100A of the telescopic laminated sheet L of modification A, the tension acting on the telescopic laminated sheet L supplied to the laminated sheet stretching mechanism 60 is changed according to information related to the size of the opening formed in the telescopic laminated sheet L by the laminated sheet stretching mechanism 60 .

[0215] Therefore, in the laminated sheet extending mechanism 60 , it is easy to form an opening of a desired size in the telescopic laminated sheet L.

[0216] <Variation 2>

[0217] In the manufacturing apparatus 100A of the second embodiment, it is assumed that the operator of the manufacturing apparatus 100A manually changes the settings of the gear rollers 62 and 64 according to the size of the opening required for the stretchable laminated sheet L.

[0218] However, the present invention is not limited to this, and the manufacturing apparatus 100A may automatically change the settings of the gear rollers 62 and 64 according to the size of the opening required for the stretchable laminated sheet L.

[0219] refer to Fig.14 as well as Fig.15 , the specific structure of the manufacturing device 100A for realizing the modification example 2 is demonstrated. Fig.14 This is a schematic diagram showing the structure of a manufacturing apparatus 100A of a stretchable laminate sheet L according to a second modification, in which the depiction of a molding section of the film F is omitted. Fig.15 This is a control block diagram of a manufacturing apparatus 100A of a stretchable laminated sheet L according to a second modification.

[0220] In addition, here, the case where the distance between the axis center of the gear roller 62 and the axis center of the gear roller 64 is set as the setting of the gear rollers 62 and 64 will be described as an example.

[0221] The manufacturing apparatus 100A of the second modification example includes a driving mechanism 68, and the driving mechanism 68 moves at least one of the axis of the gear roller 62 and the axis of the gear roller 64 toward or away from the other gear roller (see Fig.14 as well as Fig.15 ).like Fig.15 As shown in FIG. 1 , the manufacturing apparatus 100A according to the second modification does not include the output unit 94 . However, the present invention is not limited thereto, and the manufacturing apparatus 100A may include the output unit 94 .

[0222] The manufacturing device 100A of variant example 2 determines the settings of the gear rollers 62 and 64 (here, the distance between the axis center of the gear roller 62 and the axis center of the gear roller 64) in the stacked sheet extending mechanism 60 based on the information related to the size of the opening formed by the stacked sheet extending mechanism 60 in the telescopic stacked sheet L received by the receiving unit 92 in the same manner as the manufacturing device 100A of the second embodiment.

[0223] Then, the control device 90 controls the action of the driving mechanism 68 so that the distance between the axis center of the gear roller 62 and the axis center of the gear roller 64 is adjusted to the distance between the axis center of the gear roller 62 and the axis center of the gear roller 64 determined by themselves, instead of outputting the determined setting of the gear rollers 62 and 64 from the output unit 94.

[0224] Finally, the technical ideas that can be grasped from the above-mentioned embodiments are reviewed below.

[0225] The manufacturing device of the telescopic laminated sheet body is a manufacturing device of the telescopic laminated sheet body formed by overlapping and arranging a base sheet body and a stretchable film, and joining the base sheet body and the film. The manufacturing device of the telescopic laminated sheet body comprises a joining portion and an extending portion. The joining portion comprises a first joining member and a second joining member. The joining portion sandwiches a laminated body formed by overlapping a base sheet body and a film in an extended state between the first joining member and the second joining member, and heat-seals the base sheet body and the film to form the telescopic laminated sheet body. The extending portion comprises a pair of gear rollers having concave and convex surfaces on the circumferential surface. The extending portion extends the telescopic laminated sheet body conveyed by passing through the pair of gear rollers.

[0226] In the manufacturing device of the stretchable laminated sheet of the first aspect, after the stretchable laminated sheet is formed by heat-melting the substrate sheet and the film, a stretching process is performed using a gear roller having projections and depressions on the peripheral surface, thereby forming an opening of sufficient area at the heat-melted portion of the substrate sheet and the film and / or its periphery, thereby being able to manufacture a stretchable laminated sheet with good air permeability.

[0227] The manufacturing device of the telescopic laminated sheet body according to the second aspect is based on the manufacturing device of the telescopic laminated sheet body according to the first aspect, and includes a forming section and a film stretching section. The forming section forms a film from a raw material. The film stretching section is arranged between the forming section and the joining section in the conveying direction of the film, and stretches the film. The elongation of the film conveyed between the film stretching section and the joining section relative to the natural length of the film is greater than the elongation of the film conveyed between the forming section and the film stretching section relative to the natural length of the film. The elongation of the film of the telescopic laminated sheet body in the stretching section relative to the natural length of the film is greater than the elongation of the film conveyed between the film stretching section and the joining section relative to the natural length of the film.

[0228] In the manufacturing device of the telescopic laminated sheet body of the second aspect, the film thickness can be reduced by stretching the film in stages. In particular, in the manufacturing device of the telescopic laminated sheet body, after the telescopic laminated sheet body is formed using the film, the film is further stretched to suppress the damage of the film and reduce the film thickness.

[0229] The manufacturing device of the telescopic laminated sheet body of the third aspect is based on the manufacturing device of the telescopic laminated sheet body of the first aspect or the second aspect, and further includes a regulating unit and a speed control unit. The regulating unit is arranged between the joint part and the extension part on the conveying path of the telescopic laminated sheet body, and regulates the conveying speed of the telescopic laminated sheet body supplied to the extension part. The speed control unit controls the operation of the regulating unit.

[0230] In the manufacturing device of the telescopic laminated sheet of the third aspect, the conveying speed of the telescopic laminated sheet supplied to the extension part is controlled, and as a result, the tension acting on the telescopic laminated sheet supplied to the extension part is controlled. Therefore, it is possible to prevent the occurrence of undesirable situations such as excessive tension acting on the telescopic laminated sheet in the extension part to damage the telescopic laminated sheet, or the size of the opening formed in the telescopic laminated sheet in the extension part deviating from the desired size.

[0231] The manufacturing device for the telescopic laminated sheet of the fourth aspect is based on the manufacturing device for the telescopic laminated sheet of the third aspect. In the process of stable operation, the speed control unit controls the operation of the adjustment unit so that the tension acting on the telescopic laminated sheet supplied to the extension unit is smaller than the tension acting on the telescopic laminated sheet transported from the joining unit to the adjustment unit.

[0232] In the manufacturing apparatus of the stretchable laminated sheet according to the fourth aspect, it is possible to suppress the occurrence of a problem in which excessive tension acts on the stretchable laminated sheet in the extension portion during stable operation, thereby damaging the stretchable laminated sheet.

[0233] The manufacturing device for the telescopic laminated sheet of the fifth aspect is based on the manufacturing device for the telescopic laminated sheet of the third aspect or the fourth aspect. The speed control unit controls the action of the adjustment unit when the operation starts or stops, so that the tension acting on the telescopic laminated sheet supplied to the extension unit becomes larger than the tension acting on the telescopic laminated sheet transported from the joining unit to the adjustment unit.

[0234] Assume that the operation of the adjustment unit is not controlled. When the operation of the manufacturing device of the stretchable laminated sheet starts or stops, the tension acting on the stretchable laminated sheet supplied to the extension unit becomes smaller than that in the stable operation; the size of the opening formed in the stretchable laminated sheet by the extension unit may become smaller than that in the stable operation. Since the desired air permeability cannot be obtained in the stretchable laminated sheet when the opening is too small, the stretchable laminated sheet with the too small opening may not be used for the wearable article (waste).

[0235] In contrast, the manufacturing device for the telescopic laminated sheet of the fifth aspect controls the movement of the adjusting portion so that the tension acting on the telescopic laminated sheet supplied to the extension portion becomes larger. Therefore, even when the operation of the manufacturing device for the telescopic laminated sheet is started or stopped, an opening of an appropriate size can be formed in the extension portion of the telescopic laminated sheet.

[0236] The manufacturing apparatus of the stretchable laminated sheet according to a sixth aspect is the manufacturing apparatus of the stretchable laminated sheet according to the third aspect, wherein the speed control unit controls the operation of the adjustment unit so that the tension acting on the stretchable laminated sheet supplied to the stretching unit becomes constant.

[0237] In the manufacturing apparatus of the stretchable laminated sheet according to the sixth aspect, since the tension acting on the stretchable laminated sheet supplied to the extending portion is constant, it is easy to always form an opening of substantially the same size in the stretchable laminated sheet.

[0238] The manufacturing device of the telescopic laminated sheet of the seventh aspect is based on the manufacturing device of the telescopic laminated sheet of any one of the third aspect to the sixth aspect, and further includes a first roller. The first roller is arranged between the joint part and the adjustment part on the conveying path, and guides the telescopic laminated sheet wound on the first roller. The adjustment part includes a second roller wound on the telescopic laminated sheet. The adhesiveness or friction coefficient of the outer surface of the second roller is greater than that of the outer surface of the first roller.

[0239] In the manufacturing apparatus of the stretchable laminated sheet according to the seventh aspect, the stretchable laminated sheet is gripped by the outer surface of the second roller in the adjustment section, and the conveying speed of the stretchable laminated sheet supplied to the stretching section can be adjusted using a single roller.

[0240] The manufacturing apparatus of the stretchable laminated sheet according to an eighth aspect is the manufacturing apparatus of the stretchable laminated sheet according to any one of the first to seventh aspects, further comprising a heater for heating at least one of the pair of gear rollers.

[0241] In the manufacturing apparatus of the stretchable laminated sheet according to the eighth aspect, since the stretchable laminated sheet can be stretched after heating the stretchable laminated sheet, the stretchable laminated sheet can be easily stretched in the stretched portion.

[0242] The manufacturing apparatus of the stretchable laminated sheet according to the ninth aspect is the manufacturing apparatus of the stretchable laminated sheet according to the eighth aspect, wherein the stretchable laminated sheet is guided between the pair of gear rollers after contacting the outer peripheral surface of one of the pair of gear rollers heated by the heater for a predetermined length.

[0243] In the apparatus for manufacturing the stretchable laminated sheet according to the ninth aspect, the stretchable laminated sheet can be sufficiently heated easily, and the stretchable laminated sheet can be sufficiently stretched easily in the stretching portion.

[0244] The manufacturing device of the telescopic laminated sheet body of the tenth aspect is based on the manufacturing device of the telescopic laminated sheet body of any one of the first aspect to the ninth aspect, and further includes a receiving unit and a determining unit. The receiving unit receives information related to the size of the opening formed by the extension part in the telescopic laminated sheet body. The determining unit determines the setting of the gear roller in the extension part based on the information related to the size of the opening formed by the extension part in the telescopic laminated sheet body.

[0245] In the manufacturing apparatus of the stretchable laminated sheet according to the tenth aspect, since the setting of the gear roller is determined according to the size of the opening provided in the stretchable laminated sheet, it is easy to form an opening of a desired size in the stretchable laminated sheet in the extending portion.

[0246] The manufacturing device of the telescopic laminated sheet body of the 11th aspect is based on the manufacturing device of the telescopic laminated sheet body of any one of the 1st aspect to the 9th aspect, and further includes a receiving unit. The receiving unit receives information related to the size of the opening formed by the extension part in the telescopic laminated sheet body. The tension acting on the telescopic laminated sheet body supplied to the extension part is changed according to the information related to the size of the opening formed by the extension part in the telescopic laminated sheet body.

[0247] In the manufacturing apparatus of the telescopic laminated sheet according to the eleventh aspect, since the tension of the telescopic laminated sheet supplied to the extending portion is changed according to the size of the opening provided in the telescopic laminated sheet, it is easy to form an opening of a desired size in the telescopic laminated sheet in the extending portion.

[0248] The manufacturing method of the telescopic laminated sheet body of the twelfth aspect is a manufacturing method of the telescopic laminated sheet body formed by overlapping and arranging a base sheet body and a telescopic film, and joining a pair of base sheet bodies and films. The manufacturing method of the telescopic laminated sheet body comprises a welding step and a stretching step. In the welding step, the base sheet body and the film in an extended state are heat-welded to form the telescopic laminated sheet body. In the stretching step, the telescopic laminated sheet body conveyed between a pair of gear rollers having concave and convex peripheral surfaces is stretched by a pair of gear rollers.

[0249] In the manufacturing method of the stretchable laminated sheet of the twelfth aspect, after the base sheet and the film are heat-fused to form the stretchable laminated sheet, a stretching process is performed using a gear roller having a concave-convex peripheral surface, thereby forming an opening of sufficient area at the heat-fused portion of the base sheet and the film and / or its periphery (refer to Fig. 9 as well as Fig.11 ) can produce a stretchable laminate sheet with good air permeability.

[0250] The wearing article of the 13th aspect comprises a waist member and an absorbent body. The waist member is arranged on the waist of the wearer when worn. The absorbent body is joined to the waist member and arranged on the crotch of the wearer when worn. The waist member includes a waistline portion, which is arranged at the upper end of the waist member and arranged on the waist of the wearer when worn. The stretchable laminated sheet body manufactured by the manufacturing method of the 12th aspect is used in the waistline portion.

[0251] The wearing article of aspect 14 comprises a waist member and an absorbent body. The waist member is arranged on the waist of the wearer when worn. The absorbent body is joined to the waist member and is arranged on the crotch of the wearer when worn. The waist member includes a waist circumference portion and a lower waist portion. The waist circumference portion is arranged at the upper end of the waist member and arranged on the waist of the wearer when worn. The lower waist portion is arranged below the waist circumference elastic portion when worn. The lower waist portion uses an elastic laminated sheet body manufactured by the manufacturing method of aspect 12.

[0252] The wearing article of aspect 15 includes a waist member, an absorbent body and a connecting member. The waist member is arranged on the waist of the wearer when worn. The absorbent body is joined to the waist member and arranged on the crotch of the wearer when worn. The connecting member is mounted on a connecting member mounting portion, and the connecting member mounting portion is provided at least one of the left and right ends of the waist member. When worn, the connecting member is connected to the connected portion of the waist member. The connecting member mounting portion or the connected portion uses a stretchable laminated sheet body manufactured by the manufacturing method of aspect 12.

[0253] The wearing article of aspect 16 includes a waist member, an absorbent body and a connecting member. The waist member is arranged on the waist of the wearer when worn. The absorbent body is joined to the waist member and arranged on the crotch of the wearer when worn. The connecting member is mounted on a connecting member mounting portion, and the connecting member mounting portion is provided at least one of the left and right ends of the waist member. When worn, the connecting member is connected to the connected portion of the waist member. The connecting member uses a stretchable laminated sheet body manufactured by the manufacturing method of aspect 12.

[0254] In the wearing article according to the thirteenth to sixteenth aspects, the stretchable laminated sheet provides a wearing article having excellent breathability.

[0255] The wearing article of aspect 17 includes a waist member, an absorbent body and a connecting member. The waist member is arranged on the waist of the wearer when worn. The absorbent body is joined to the waist member and arranged on the crotch of the wearer when worn. The connecting member is mounted on a connecting member mounting portion, and the connecting member mounting portion is provided at least one of the left and right ends of the waist member. When worn, the connecting member is coupled to the coupled portion of the waist member. A stretchable laminated sheet is used in at least one of the waist member and the connecting member, and the stretchable laminated sheet is a base sheet and a stretchable film joined in an overlapping state, and an opening is formed at the joining portion between the base sheet and the film.

[0256] In the wearing article according to the seventeenth aspect, since the stretchable laminate sheet having openings formed also at the joining portion between the base sheet and the film is used, a wearing article having excellent breathability can be realized.

[0257] Explanation of symbols

[0258] 20 Discharge mechanism (molding section)

[0259] 30 Cooling roller (forming section)

[0260] 38. Film stretching mechanism (film stretching unit)

[0261] 48. Lamination joint mechanism (joining part)

[0262] 60 laminated sheet extension mechanism (extension part)

[0263] 62, 64 gear roller

[0264] 66 Heater

[0265] 68 axis drive mechanism

[0266] 90 Control device (speed control unit, determination unit)

[0267] 92 Receiving Department

[0268] 94 Output

[0269] 100, 100A telescopic laminated sheet manufacturing device

[0270] 110 Adjustment Department

[0271] 112 Speed ​​adjustment roller (second roller)

[0272] 120 Guide roller (first roller)

[0273] 300 Clothing Items

[0274] 310 Waist Component

[0275] 312 Waist

[0276] 314 Lower waist

[0277] 320 Absorber

[0278] 400 Clothing Items

[0279] 410 Front body part (waist member)

[0280] 412 Waist

[0281] 414 Lower waist

[0282] 416 Mounting part (joint component mounting part)

[0283] 420 rear body (waist member)

[0284] 422 Waist

[0285] 424 Lower waist

[0286] 426 buckle part (joined part)

[0287] 430 Crotch (absorber)

[0288] 440 Absorbent articles (absorbents)

[0289] 450 Fastening belt (joining member)

[0290] B Laminated body

[0291] F Film

[0292] L telescopic laminate

[0293] S1 First nonwoven fabric sheet (base material sheet)

[0294] S2 Second nonwoven fabric sheet (substrate sheet).

Claims

1. A manufacturing device for a stretchable laminated sheet, which is configured by overlapping a base sheet and a stretchable film, and bonding the base sheet and the film to form the stretchable laminated sheet, the manufacturing device comprising: A bonding portion having a first bonding member and a second bonding member, wherein a laminate formed by overlapping the substrate sheet and the film in an extended state is sandwiched between the first bonding member and the second bonding member, and the substrate sheet and the film are thermally welded to form the stretchable laminate sheet; The stretching section includes a pair of gear rollers having projections and depressions on peripheral surfaces thereof, and stretches the stretchable laminated sheet conveyed by passing between the pair of gear rollers.

2. The manufacturing device of the stretchable laminate sheet according to claim 1, further comprising: A forming section, forming the film from raw materials; a film stretching section, arranged between the forming section and the joining section in the conveying direction of the film, and stretching the film; The elongation of the film conveyed between the film extending portion and the joining portion relative to the natural length of the film is greater than the elongation of the film conveyed between the forming portion and the film extending portion relative to the natural length of the film; The elongation rate of the film of the stretchable laminate sheet in the extending portion relative to the film of the natural length is greater than the elongation rate of the film conveyed between the film extending portion and the joining portion relative to the film of the natural length.

3. The manufacturing device of the stretchable laminate sheet according to claim 1 or 2, further comprising: an adjusting section, arranged between the joining section and the extending section on a conveying path of the telescopic laminated sheet, and adjusting a conveying speed of the telescopic laminated sheet supplied to the extending section; The speed control unit controls the operation of the adjustment unit.

4. The manufacturing device of the telescopic laminated sheet according to claim 3, During stable operation, the speed control unit controls the operation of the adjustment unit so that the tension acting on the stretchable laminated sheet supplied to the extending unit becomes smaller than the tension acting on the stretchable laminated sheet conveyed from the joining unit to the adjustment unit.

5. The manufacturing device of the telescopic laminated sheet according to claim 3 or 4, The speed control unit controls the action of the adjustment unit at the start or stop of operation so that the tension acting on the telescopic stacked sheet supplied to the extension unit becomes larger than the tension acting on the telescopic stacked sheet conveyed from the joint to the adjustment unit.

6. The manufacturing device of the telescopic laminated sheet according to claim 3, The speed control unit controls the operation of the adjustment unit so that the tension acting on the stretchable laminated sheet supplied to the extending unit becomes constant.

7. The manufacturing device of the stretchable laminated sheet according to any one of claims 3 to 6, further comprising a first roller, the first roller being arranged between the joining section and the adjusting section on the conveying path to guide the wound stretchable laminated sheet; The adjusting part includes a second roller for winding the telescopic laminated sheet; The adhesiveness or friction coefficient of the outer surface of the second roller is greater than that of the outer surface of the first roller. 8 . The manufacturing device of the stretchable laminated sheet according to claim 1 , further comprising a heater for heating at least one of the pair of gear rollers. 9 . The manufacturing device of the stretchable laminated sheet according to claim 8 , wherein the stretchable laminated sheet is guided between the pair of gear rollers after coming into contact with the outer peripheral surface of one of the pair of gear rollers heated by the heater for a predetermined length.

10. The manufacturing device of the stretchable laminate sheet according to any one of claims 1 to 9, further comprising: A receiving unit, receiving information related to the size of the opening formed by the extending portion in the telescopic laminated sheet; The determination section determines the setting of the gear roller in the extending section based on the information.

11. The manufacturing device of the stretchable laminated sheet according to any one of claims 1 to 9, further comprising: a receiving unit that receives information related to the size of the opening formed by the extending portion in the stretchable laminated sheet; The tension acting on the stretchable laminate sheet supplied to the extending portion is changed according to the information.

12. A method for manufacturing a stretchable laminated sheet, comprising: arranging a base sheet and a stretchable film in an overlapping manner, and bonding the base sheet and the film to form the stretchable laminated sheet, the method comprising: A welding step of thermally welding the substrate sheet and the film in an extended state to form the telescopic laminate sheet; The stretching step is to stretch the stretchable laminated sheet conveyed between a pair of gear rollers having concavoconvex surfaces on the circumferential surfaces by the pair of gear rollers.

13. Wearing articles, with: A waist member, arranged on the waist of the wearer; an absorbent body joined to the waist member and arranged in the crotch of the wearer; The waist member includes a waist portion, which is arranged at the upper end of the waist member and at the waist of the wearer when the waist member is worn; The stretchable laminate sheet produced by the production method according to claim 12 is used for the waist portion.

14. Wearing articles, with: A waist member, arranged on the waist of the wearer; an absorbent body joined to the waist member and arranged in the crotch of the wearer; The waist member comprises: A waist portion, which is arranged at the upper end of the waist member and at the waist of the wearer when the wearer is wearing the garment; a lower waist portion, arranged below the waistline portion; The lower waist portion uses a stretchable laminate sheet produced by the production method according to claim 12.

15. Wearing articles, with: A waist member, arranged on the waist of the wearer; an absorbent body joined to the waist member and arranged in the crotch of the wearer; A coupling member mounted on a coupling member mounting portion provided at least one of the left and right ends of the waist member; When worn, the coupling member is coupled to the coupled portion of the waist member; The stretchable laminate sheet body manufactured by the manufacturing method according to claim 12 is used in the connecting member mounting portion or the connected portion.

16. Wearing articles, with: A waist member, arranged on the waist of the wearer; an absorbent body joined to the waist member and arranged in the crotch of the wearer; A coupling member mounted on a coupling member mounting portion provided at least one of the left and right ends of the waist member; When worn, the coupling member is coupled to the coupled portion of the waist member; The stretchable laminated sheet body manufactured by the manufacturing method according to claim 12 is used as the joining member.

17. Wearing articles, with: A waist member, arranged on the waist of the wearer; an absorbent body joined to the waist member and arranged in the crotch of the wearer; A coupling member mounted on a coupling member mounting portion provided at least on one of the left and right ends of the waist member; When worn, the coupling member is coupled to the coupled portion of the waist member; At least one of the waist member and the connecting member uses a stretchable laminated sheet in which a base sheet and a stretchable film are joined in an overlapping state, and an opening is formed at a joining portion between the base sheet and the film.

Images