TWI487512B - Production method of stretchable sheet body - Google Patents

Description

Method for manufacturing stretchable sheet

The present invention relates to a method of manufacturing a stretchable sheet.

In view of minimizing material reduction, minimizing waste, benefiting the environment, and suppressing costs, it is known to manufacture a waist flap comprising a fastening tape in advance in another step, and to have a rectangular shape including the absorbent body. An unfoldable disposable diaper manufactured by attaching the waist flap to the absorbent body. From the viewpoint of wearability, the waist flap sheet is preferably a stretchable member, and as the waist flap sheet, a stretchable film is generally used. However, since the cost of the stretchable film is large, it is preferable to form a waist flap using a general-purpose elastic member, that is, a so-called rubber thread. However, in the case where the step of obtaining the waist flap sheet using the rubber thread and the step of attaching the waist flap sheet to the absorbent body to obtain the unfolded disposable diaper are continuously performed in a series of processes, rubber is used. The direction in which the waist flaps are formed by the thread is generally in the same direction as the direction in which the absorbent body is conveyed, and is oriented orthogonal to the direction in which the waist flaps are required to be worn when the disposable diapers are worn. . Therefore, in the case where the waist-shaped flap sheet formed by using the rubber thread is attached to the absorbent body in the continuous step to manufacture the unfolded disposable diaper, it is necessary to rotate the waist flap sheet formed by the rubber thread 90. Degree, then attached to the absorbent body. As such, an additional increase in equipment investment is required due to the additional need to rotate the waist flaps by 90 degrees.

As a method of rotating the waist flap sheet by 90 degrees as described above, for example, Patent Document 1 and Patent Document 2 describe a method for producing a stretchable sheet body which is subjected to the following two steps: Applying an adhesive to the water-permeable sheet in the directional operation, so that the linear elastic body imparting tension to the coated surface of the adhesive is parallel in the zigzag state along the sheet surface of the running sheet and toward the running direction of the sheet Moving so that the linear elastic body is followed by the sheet in an extended state; and the linear elastic body is cut at both ends. Further, Patent Document 1 also discloses a method of arranging linear elastic bodies in a zigzag state in parallel.

However, in the cutter used in the cutting step described in Patent Document 1 and Patent Document 2, it is difficult to cut the unnecessary portions of the both ends of the linear elastic body as short, and the stretchability of the manufacture is made. The sheet becomes unsightly. Further, in Patent Document 1 and Patent Document 2, in the method of cutting the unnecessary portions of the both ends of the linear elastic body into the same length, no other method is disclosed except for the provision of the roller cutter.

Further, in the techniques described in Patent Documents 1 and 2, the stretched state in the linear elastic body is released, and the portion in which the edge of the self-contained sheet body extends in the width direction is retained in a state of being oriented in an irregular direction. As a result, the stretched sheet produced is rendered unattractive.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. SHO 63-243309

Patent Document 2: Japanese Patent Laid-Open Publication No. 2010-22588

An object of the present invention is to provide a method for producing a stretchable sheet which can eliminate the defects of the prior art described above.

The present invention relates to a method for producing a stretchable sheet which is continuously manufactured between a pair of strip-shaped sheets to fix a linear elastic body in a state of being elongated in a direction crossing a conveying direction of the belt-shaped sheet. A stretchable sheet.

The method for producing a stretchable sheet of the present invention includes a supply step of continuously discharging the linear elastic body, introducing the discharged linear elastic body to an elastic body winding mechanism, and a transporting step of using the linear elastic body The elastic body winding mechanism continuously winds the linear elastic body to a pair of conveyance belts which are spaced apart from each other in a direction orthogonal to the conveyance direction of the sheet body, and conveys the linear elastic body by a pair of the conveyance belts An integration step of fixing the linear elastic body conveyed between the strip-shaped sheets; and a cutting step of extending from both ends of the pair of strip-shaped sheets in the width direction A portion of the above linear elastic body.

In the above-described dicing step, it is preferable that the stretched portion of the linear elastic body is cut while being stretched, and the extended portion of the linear elastic body is removed.

Preferably, the cutting step further includes a first dicing step of dicing the linear elastic body extending from both end edges in the width direction of the strip-shaped sheet body after the integrating step And the second cutting step is performed after the first cutting step, and the second cutting step is performed by the cutting, and the second cutting step is performed after the first cutting step. The whole or a part of the portion of the linear elastic body extending from both end edges of the strip-shaped sheet body in the width direction.

Hereinafter, the method for producing the stretchable sheet of the present invention will be described with reference to the drawings based on preferred embodiments thereof.

As shown in Fig. 1, in the stretchable sheet produced in the present embodiment, for example, the waist flap 3 of the unfolded disposable diaper 1 can be used. Therefore, first, the stretchable sheet produced by the present embodiment will be described for the unfolded disposable diaper 1 of the waist flap.

As shown in Fig. 1, the unfolded disposable diaper 1 (hereinafter also referred to as "diaper 1") includes an absorbent body 2 including a ventral side A on the ventral side of the wearer when worn, and a back a back side portion B on the side, and a lower jaw portion C between the front side portion A and the back side portion B; and a pair of left and right waist flaps 3, 3 connected to the left and right sides of the back side portion B . As shown in Fig. 1, the diaper 1 includes a pair of right and left sheets 4, 4 which are connected to the left and right outer sides of the front side portion A. Further, as shown in Fig. 1, the absorbent body 2 of the diaper 1 has a rectangular shape in a state of being spread out in a planar shape. Further, as shown in Fig. 1, the sheet 4 of the diaper 1 has a trapezoidal shape in a state of being spread out in a planar shape, and the bottom side is fixed to the absorbent by a method such as an adhesive or a fusion method. Ontology 2.

In the following description, the longitudinal direction of the absorbent body 2 (also in the longitudinal direction of the diaper 1) is referred to as the Y direction, and the width direction of the absorbent body 2 (also in the width direction of the diaper 1) is taken as the X direction. To illustrate.

Each of the pair of waist panels 3 and 3 has a rectangular shape in a state of being spread out in a planar shape. Each of the waist panels 3 includes two sheets 5, 6 and a plurality of linear elastic bodies 7 disposed in a state of being elongated between the two sheets 5, 6. Each of the waist panels 3 includes a stretchable sheet in which the linear elastic body 7 is fixed in a state of being elongated in a direction intersecting the Y direction between the pair of sheets 5 and 6. Specifically, as shown in FIG. 1, each of the waist panels 3 is a line extending in a direction orthogonal to the Y direction (X direction) between two rectangular sheets 5 and 6 having the same shape and the same size. The elastic bodies are disposed at substantially equal intervals in the Y direction, and are integrally fixed by a method such as an adhesive or a fusion. The end portion of the rectangular waist portion 3 thus formed is fixed to the end portion in the X direction by a bonding agent or a bonding method. Further, the end portion of the rectangular waist panel 3 in the X direction is fixed to the back side portion B of the absorbent body 2 by means of an adhesive or a fusion method, and is connected to the X side of the back side portion B. . Further, the linear elastic body 7 included in the waist flap 3 (stretchable sheet) manufactured in the present embodiment is elongated in a direction orthogonal to the Y direction, but is elongated in a direction crossing the Y direction. can.

In the diaper 1, the stretchable sheet system constituting the waist flap 3 is fixed so that the conveyance direction y of the sheet at the time of manufacture is parallel to the Y direction, and the direction x orthogonal to the conveyance direction of the sheet at the time of manufacture coincides with the X direction. .

As shown in FIG. 1, the absorbent body 2 includes a liquid-permeable front sheet 21, a liquid impervious or water-repellent back sheet 22, and a liquid retaining property interposed between the two sheets 21 and 22. Absorber 23. As shown in Fig. 1, the absorbent body 2 is formed by interposing the absorbent body 23 between the two sheets 21, 22 to form the front sheet 21 of the inner surface of the diaper 1, and forming urine. The back sheet 22 on the outer surface of the sheet 1 is joined. Moreover, as shown in FIG. 1, the absorptive main body 2 is formed with the body protection formation sheets 24 and 24 in the both sides of the Y direction. The sheet for forming the three-dimensional protective sheet 24 is fixed to the front sheet body 21 along both side portions of the absorbent body 2 in the Y direction. Each of the three-dimensional protection forming sheets 24 has an elastic member 25 for forming a three-dimensional shield in the vicinity of the inner edge in the X direction, and a part of a specific width from the end edge is formed by the contraction force of the elastic member 25 when worn. The three-dimensional protection is formed spaced apart from the front sheet 21. Moreover, the elastic member 26 for forming a leg pleat is disposed in a portion of the absorbent body 2 disposed at the leg circumferences on both sides in the longitudinal direction. When worn, the leg gathers are formed by the contraction of the elastic member 26, so that it fits snugly on the leg circumference.

Hereinafter, the material for forming the diaper 1 will be described.

The sheets 5 and 6 and the sheet 4 constituting the waist panel 3 can be used without any particular limitation as long as they are generally used for absorbent articles such as disposable diapers. For example, as the sheets 5, 6 and the sheet 4, a non-woven fabric, a woven fabric, a film, or a laminated sheet thereof or the like can be used. The front sheet 21 and the back sheet 22 constituting the absorbent body 2 can be used without any particular limitation as long as they are generally used for absorbent articles such as disposable diapers. For example, as the back sheet 21, a hydrophilic or liquid permeable non-woven fabric or the like can be used, and as the back sheet 22, a resin film having liquid impermeability or water repellency, a laminate of a resin film and a non-woven fabric, or the like can be used. As the absorber 23, an aggregate of fibers such as a pulp fiber (including a non-woven fabric) coated with a core wrap sheet including a water-permeable tissue or a non-woven fabric, or a particle of the water-absorbent polymer can be used. An absorbent core or the like formed therein. As the sheet for forming the three-dimensional protective sheet constituting the three-dimensional protection, a stretchable film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.

As the linear elastic body 7 and the elastic member 25 constituting the three-dimensional protection, natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, and the like can be used. A linear stretchable material such as a polyethylene-a-olefin copolymer such as ethyl acrylate-ethylene. In addition to the circular or square shape, it also includes a narrow band such as an elliptical shape or a rectangular cross section, and a multifilament type can also be used. The width (or diameter) of the linear elastic member is, for example, 0.1 to 3 mm, preferably 1 mm or less. As the fastening tape 8, for example, a hook member of a mechanical fastener can be adhered to one surface of a fastening tape base such as a nonwoven fabric by heat fusion or an adhesive.

Next, in a preferred first embodiment of the method for producing a stretchable sheet of the present invention, a case where the waist flap 3 (stretchable sheet) of the diaper 1 is produced will be taken as an example, and reference is made to the drawings. Explain on one side.

Fig. 2 is a view schematically showing a manufacturing apparatus 11A which can be preferably used in the method of manufacturing the waist panel 3 (stretchable sheet) of the present embodiment.

As shown in Fig. 2, the manufacturing apparatus 11A is a device for continuously manufacturing the waist flap 3 (stretchable sheet), and includes continuously winding the linear elastic body 7 to the conveying direction (y direction) with the sheet body. A rotating arm (elastic winding mechanism) 14 for winding the elastic body of the conveyor belts 12 and 13 in the orthogonal direction (x direction). Further, as shown in FIGS. 2 and 3, the manufacturing apparatus 11A includes an elastic body supply mechanism 15 that continuously discharges the linear elastic body 7, introduces the linear elastic body 7 to the rotating arm 14, and a conveying mechanism 16 The linear elastic body 7 is transported between the pair of strip-shaped sheets 50 and 60 by the pair of transfer belts 12 and 13, and the integrated mechanism 17 is stretched by using a pair of rolls 171 and 172. The linear elastic body 7 is fixed between the pair of strip-shaped sheets 50, 60; and the cutting mechanism 18 cuts the linear elastic body extending from both ends in the width direction of the strip-shaped sheets 50, 60. Part of 7.

The conveyance direction of the sheet is wound in the conveyance direction of the linear elastic body 7 of the pair of conveyance belts 12 and 13 or the sheet body (belt sheet body 50 and/or 60) integrated with the linear elastic body 7. Transfer direction.

The y direction of the arrow in Fig. 2 indicates the transport direction of the sheet, that is, the transport direction of the linear elastic body 7 and the pair of strip-shaped sheets 50, 60, and also the waist flap 3 which is finally manufactured by the present embodiment (the expansion and contraction) The conveying direction of the sheet) and the conveying direction of the continuous body of the diaper 1 to which the waist flap 3 (stretchable sheet) is attached are the same direction. Further, the x direction of the arrow in Fig. 2 is in the width direction of the strip-like sheets 50, 60, and is a direction orthogonal to the conveying direction of the sheet. Further, the z direction of the arrow in Fig. 2 is a direction in which the pair of rolls 171 and 172 are opposed to each other.

As shown in Fig. 2, the conveying belt 12 of the conveying mechanism 16 is a rotating belt having no edge shape, and includes upper and lower layers of the upper layer conveying belt 12a and the lower layer conveying belt 12b. The upper conveyance belt 12a is placed between the pulleys 121 and 122 arranged in the z direction in the direction of the rotation axis. The lower conveyance belt 12b is placed between the pulleys 124 and 125 arranged in the z direction in the direction of the rotation axis. The pulley 121 is located on the downstream side of the pair of rolls 171 and 172 which fix the linear elastic body 7 in the extended state between the pair of strip-shaped sheets 50 and 60, and the pulley 122 is located on the upstream side of the rolls 171 and 172. The pulley 124 is located on the downstream side of the rolls 171 and 172, and the pulley 125 is located on the upstream side of the rolls 171 and 172. The pulleys 121 and 124 are disposed at the same position in the lower two layers. Further, the pulleys 122 and 125 are also disposed at the same position in the upper and lower layers. Further, the pulley 121 (the pulley 124) and the pulley 122 (the pulley 125) are located further outward in the x direction than the end portions of the strip-shaped sheets 50 and 60 in the x direction. A servo motor (not shown) is connected to each of the driving portions of the pulley 121 and the pulley 124, and the rotational speeds of the upper conveyor belt 12a and the lower conveyor belt 12b can be changed.

As shown in FIG. 2, the conveyance belt 13 of the conveyance mechanism 16 is a rotation belt which has no edge shape similarly to the conveyance belt 12, and has the upper-layer two upper layer conveyance belt 13a and the lower layer conveyance belt 13b. The upper conveyance belt 13a is placed between the pulleys 131 and 132 arranged in the z direction in the rotation axis direction. The lower conveyance belt 13b is interposed between the pulleys 134 and 135 which are arranged in the z-direction in the direction of the rotation axis. The pulley 131 is located on the downstream side of the pair of rolls 171, 172, and the pulley 132 is located on the upstream side of the rolls 171, 172. The pulley 134 is located on the downstream side of the rolls 171 and 172, and the pulley 135 is located on the upstream side of the rolls 171 and 172. The pulleys 131 and 134 are disposed at the same position in the lower two layers. Further, the pulleys 132 and 135 are also disposed at the same position in the upper and lower layers. Further, the pulley 131 (the pulley 134) and the pulley 132 (the pulley 135) are located further outward in the x direction than the end portions of the strip-shaped sheets 50 and 60 in the x direction. A servo motor (not shown) is connected to each of the driving portions of the pulley 131 and the pulley 134, and the rotational speeds of the upper conveyor belt 13a and the lower conveyor belt 13b can be changed.

As shown in Fig. 2, the conveyor belt 12 (the upper conveyor belt 12a and the lower conveyor belt 12b) is disposed on the upstream side of the pair of rollers 171, 172 by being placed on the pulleys 121, 122 and the pulleys 124, 125 arranged as described above. Configured on the downstream side. In addition, the conveyor belts 13 (the upper conveyor belt 13a and the lower conveyor belt 13b) are disposed on the upstream side to the downstream side of the pair of rollers 171 and 172 by the pulleys 131 and 132 and the pulleys 134 and 135 which are disposed in the above-described manner. . Further, the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) are located on the outer side in the x direction of the strip-shaped sheets 50 and 60, and are disposed symmetrically to each other. . The conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) are rotated so that each outer peripheral side may move in the y direction.

Preferably, any one of the conveyor belt 12 (the upper conveyor belt 12a and the lower conveyor belt 12b) and the conveyor belt 13 (the upper conveyor belt 13a and the lower conveyor belt 13b) are timing belts. The rotation speeds of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) are respectively arranged on the pulley 121 and the pulley 124, and the pulley 131 and the pulley 134 are driven. The rotational speed of the servo motor (not shown) of the unit is controlled by a control unit (not shown) included in the manufacturing apparatus 11A.

As shown in FIG. 2, the rotating arm 14 includes an arm portion 141 including a shaft portion 142, a surrounding portion 143 and a connecting portion 144, and a driving mechanism 147 which is a rotating shaft of the shaft portion 142 and an arm The portion 141 rotates. The connecting portion 144 is angularly coupled to each of the shaft portion 142 and the surrounding portion 143, and the surrounding portion 143 is substantially parallel to the shaft portion 142. An inlet 145 of the linear elastic body 7 is provided at one end of the shaft portion 142, and an outlet 146 of the linear elastic body 7 is provided at one end of the surrounding portion 143. The linear elastic body 7 introduced from the introduction port 145 passes through the shaft portion 142. The joint portion 144 and the surrounding portion 143 are smoothly led out from the outlet 146. Various well-known members (driven rollers, low friction members, and the like) capable of reducing friction with the linear elastic body 7 may be disposed at the bent portion of the arm portion 141 and the outlet 146 or the like.

The position of the outlet 146 of the surrounding portion 143 is disposed at the end of the upstream side of the transport belt 12 (the upper conveyor belt 12a, the lower conveyor belt 12b) and the conveyor belt 13 (the upper conveyor belt 13a and the lower conveyor belt 13b). At the downstream side. A servo motor 148 is attached to a driving portion (shaft portion 142) of the rotating arm 14, and by the rotation of the servo motor 148, the surrounding portion 143 surrounds the conveyor belt 12 (the upper conveyor belt 12a, the lower conveyor belt 12b) and the conveyor belt 13 ( The outer layer of the upper conveyance belt 13a and the lower conveyance belt 13b). The diameter of the track in which the outlet 146 is rotated is larger than the distance between the outer surfaces of the pair of conveyor belts 12, 13.

By the rotation arm 14 as described above, the upstream side of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) can be provided on the outer peripheral side. The obtained linear elastic body 7 is continuously wound. The rotational speed of the rotating arm 14, that is, the rotational speed of the servo motor 148 is controlled by a control unit (not shown) included in the manufacturing apparatus 11A.

As shown in FIG. 3, the elastic body supply mechanism 15 includes a tensioner 151 which is located on the downstream side of the bobbin 70 wound around the linear elastic body 7, and applies tension to the linear elastic body 7 by braking; the discharge roller 152, It is located on the downstream side of the tensioner 151, and the linear elastic body 7 is discharged from the bobbin 70; and a tension measuring device 153 which is located on the downstream side of the discharge roller 152 for measuring the tension. The direction of the rotation axis of the discharge roller 152 is arranged in the x direction. A servo motor (not shown) is attached to the driving portion of the discharge roller 152. The discharge roller 152 is used by winding the linear elastic body 7 one or more times (preferably twice) around its outer circumference. The control unit (not shown) included in the manufacturing apparatus 11A can control the rotation speed of the servo motor (not shown), that is, the rotation speed of the discharge roller 152, based on the detection output by the tension measuring device 153. The specific tension is taken up from the bobbin 70 to the linear elastic body 7.

As shown in FIG. 3, the elastic body supply mechanism 15 includes a feed roller 156 on the downstream side of the discharge roller 152. The feed roller 156 is disposed between the rotating arm 14 and the discharge roller 152, and its rotation axis direction is arranged in the x direction. A servo motor (not shown) is attached to the driving portion of the feed roller 156, and the rotational speed of the servo motor (not shown), that is, the rotational speed of the feed roller 156 is controlled by the manufacturing device 11A (not shown). Controlled).

As shown in Figure 2 and Figure 4. The integration mechanism 17 includes a pair of rolls 171, 172. As the pair of rolls 171 and 172, a cylindrical roll made of metal or a cylindrical roll made of low-hardness rubber can be used. A servo motor (not shown) is attached to each of the pair of rolls 171 and 172, and the rotation speed is controlled by a control unit (not shown) included in the manufacturing apparatus 11A. A gear for driving transmission is attached to each of the pair of rolls 171 and 172. The rotation speed of the servo motor (not shown), that is, the rotation speed of one of the rolls 171 and 172 can be controlled by the drive mechanism (not shown) in accordance with the production speed of the stretchable sheet. At this time, the driving force can be transmitted to the other rolls 172 and 171 by the gear meshing for driving transmission, and the pair of rolls 171 and 172 can be rotated. In order to securely fix the linear elastic body in the extended state between the pair of strip-shaped sheets 50 and 60, the bearing portions of the pair of rolls 171 and 172 are respectively pressed by hydraulic force, air pressure, spring, or the like. The bearing is partially pressurized.

As shown in Fig. 2, the pair of rolls 171 and 172 are located on the inner circumference side of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the inner circumference of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b). Between the sides.

As shown in FIGS. 2 and 4, the cutting mechanism 18 in the manufacturing apparatus 11A includes a pair of a press cutter roller 183 and an anvil roll 184. The cutting mechanism 18 is disposed at an inner portion of the pair of conveyor belts 12, 13. More specifically, the pair of press-cut slitting rolls 183 and anvil rolls 184 are located in the y direction in the rolls 121, 172 and the transfer belts 12 (the upper conveyance belt 12a and the lower conveyance belt 12b). Or between the rollers 131 and 134 of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b). As shown in Fig. 2, the pair of press-cutting slitting rolls 183 and the anvil roll 184 are located on the inner peripheral side of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) in the x direction, and the conveyance belt 13 (upper conveyance) Between the inner peripheral sides of the belt 13a and the lower conveyor belt 13b).

As shown in Fig. 6, the press-cutting slitting rolls 183 on the upper side in the z direction are provided with cutting blades 185 and 185 extending in the circumferential direction on the outer peripheral surfaces of the x-direction outer sides. In the manufacturing apparatus 11A, the cutter 185 is located further outward in the x-direction outer end of the strip-like sheets 50, 60 which are folded outward from the outer surface side, that is, the x-direction outer end of the strip-shaped sheets 50, 60. The inner side of the conveyor belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the outer side of the belt-like sheets 50 and 60 and the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) Between the inner circumference side. The cutter 185 has a circular shape when viewed from the side.

As shown in FIG. 6, the anvil roll 184 on the lower side in the z direction is a roll longer than the press-cut type longitudinal cutting roll 183 in the x direction. The anvil roll 184 is provided with a cutter receiving portion 187 at a position corresponding to each of the cutting blades 185 of the press-cutting slitting rolls 183. The cutter receiving portion 187 has a circular shape when viewed from the side. As shown in Fig. 6, in the manufacturing apparatus 11A, the diameter of the circular cutter receiving portion 187 is larger than the diameter of the center of the anvil roller 184 in the x direction, but it is not necessary to be large, and may be, for example, the same diameter.

In the manufacturing apparatus 11A, a servo motor (not shown) is attached to the driving sections of the press-cutting slitting rolls 183 and the anvil rolls 184, and the rotation speed is controlled by a control unit (not shown) provided in the manufacturing apparatus 11A. . The rotational speed of the cutting blade 185 of the press-cut slitting roller 183 is substantially the same as the rotational speed of the cutter receiving portion 187 of the anvil roller 184, but may be faster than the rotational speed of the cutter receiving portion 187. Further, the rotational speed of the cutter 185 is the peripheral speed at the cutter 185 of the press-cut slitting roller 183, and the rotational speed of the cutter receiving portion 187 is the peripheral speed at the cutter receiving portion 187 of the anvil roller 184. From the viewpoint of the cutting property of the linear elastic body 7, it is preferable that the rotational speed of the cutting blade 185 is faster than the rotational speed of the cutter receiving portion 187, and the rotational speed of the cutting blade 185 is rotated with respect to the cutter receiving portion 187. The peripheral speed ratio of the speed is 1 to 10, preferably 1 to 2, more preferably 1 to 1.5. However, the damage to the cutter 185 and the cutter receiving portion 187 becomes larger than that in the case where the rotational speed of the cutter 185 and the cutter receiving portion 187 is the same speed, and therefore, the rotational speed of the cutter 185 is relatively the same as the cutting speed. The peripheral speed of the rotational speed of the receiver portion 187 is appropriately determined in accordance with the material (material, thickness) and elongation of the linear elastic body 7. Further, if the anvil roll 184, particularly the cutter receiving portion 187, is too soft, the cutter receiving portion 187 is worn to cause a groove to deteriorate the cutting property. From this point of view, it is preferable to change the peripheral speed ratio. The hardness of the cutter receiving portion 187 of the anvil roll 184 and the cutter 185 of the press-cut slitting roller 183 is poorly set, and it is preferable that the cutter receiving portion 187 of the anvil roll 184 is hard.

Further, as shown in FIG. 6, the cutting mechanism 18 of the manufacturing apparatus 11A includes an integrated press-cutting slitting roller 183 integrally formed by a cutting roller and a pair of circular cutting blades 185 and 185, but may include Instead of the integral press-cut slitting roller 183, a so-called holding cutter that rotatively holds a pair of circular cutters is used.

It is not necessary to attach a servo motor (not shown) to the driving portion of the press-cut slitting roller 183. For example, in the case of a retaining cutter, the anvil roller 184 may be pressurized and cut without mounting a motor. The rotation of the receiver receiving portion 187 is rotated in conjunction therewith.

As shown in Fig. 4 and Fig. 6, in the manufacturing apparatus 11A, the pressing belt 191 of the linear elastic body 7 is disposed above the z-direction of the cutter receiving portions 187 and 187 on both outer sides of the anvil roll 184 in the x direction. 191. Since the pressing belts 191 and 191 are formed bilaterally symmetrically, in the following description, a pressing belt 191 will be described.

As shown in FIG. 4, the pressing belt 191 is placed between the pulleys 191a, 191b, and 191c arranged in the x direction in the rotation axis direction. The pulley 191a is located on the downstream side of the anvil roll 184, the pulley 191c is located on the upstream side of the anvil roll 184, and the pulley 191b is located on the upstream side of the pulley 191c. The lower end of the pulley 191a in the z direction and the lower end of the pulley 191c in the z direction are located lower than the upper end of the anvil roll 184 in the z direction. Therefore, as shown in FIG. 4, the pressing belt 191 spanned between the pulleys 191a, 191b, and 191c is in contact with a portion of the outer circumference of the cutter receiving portion 187 of the anvil roller 184, and with the rotation of the anvil roller 184 Rotate together.

As shown in FIG. 2, the manufacturing apparatus 11A includes suction portions 195 and 195 that are attracted by a pair of cutting-cut longitudinal slitting rollers 183 and anvil rollers 184 as one of the cutting mechanisms 18 An unnecessary portion of the linear elastic body 7 on both outer sides of the strip-shaped sheets 50, 60 in the x direction. The suction portions 195 and 195 are disposed on both outer sides of the anvil roll 184 in the x direction. Further, the arrangement positions of the suction portions 195 and 195 may be disposed on the downstream side where the pressing belt 191 and the cutter receiving portion 187 are in contact with each other.

Next, a method of manufacturing the stretchable sheet using the above-described manufacturing apparatus 11A will be described.

First, as shown in FIG. 3, the linear elastic body 7 is continuously discharged, and the discharged linear elastic body 7 is introduced into the elastic arm winding arm 14 (supply step). As described in detail, the linear elastic body 7 is continuously discharged from the bobbin 70 wound around the linear elastic body 7 by using the discharge roller 152. At the time of release, the rotation speed of the discharge roller 152 is controlled by the control unit (not shown) provided in the manufacturing apparatus 11 based on the detection output of the tension of the linear elastic body 7 by the tension measuring device 153. The linear elastic body 7 is discharged from the bobbin 70 at a specific tension.

Then, the linear elastic body 7 is introduced to the rotating arm 14. At the time of introduction, the linear elastic body 7 is wound by the rotating roller 14 to a speed higher than the winding speed of the pair of conveying belts 12, 13 by the rotating arm 14, and is released by the tensioner 151 and The linear elastic body 7 which is extended by the roller 152 to a specific elongation stress is supplied to the rotating arm 14. Here, the "winding speed" refers to the outer peripheral side of the surrounding conveyor belt 12 (the upper conveyor belt 12a and the lower conveyor belt 12b) and the conveyor belt 13 (the upper conveyor belt 13a and the lower conveyor belt 13b). The length of the linear elastic body 7 is divided by the value obtained by the time required to surround one week.

Then, as shown in FIGS. 2 and 4, the linear elastic body 7 is continuously wound around the pair of conveyor belts 12 and 13 by the rotary arm 14, and the linear elastic body is conveyed by the pair of conveyor belts 12 and 13. 7 (transfer step). As described in detail, the linear elastic body 7 supplied into the rotating arm 14 in the extended state is introduced into the arm portion 141 from the introduction port 145, and passes through the shaft portion 142, the connecting portion 144, and the surrounding portion 143. The outlet 146 is led out. The linear elastic body 7 which is led out from the outlet 146 is rolled out to the outer side of the upstream side of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) by rotating the rotary arm 14 while being rotated. The side and the upstream side of the upstream side of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) are the outer peripheral side. Here, the linear elastic body 7 is continuously spiraled by the rotation operation of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b). It is wound around the outer peripheral side of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the outer side of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b). The linearly wound linear elastic body 7 is conveyed to between the pair of belt-like sheets 50 and 60 on the downstream side.

Here, the linear elastic body 7 wound around the pair of conveyor belts 12 and 13 is elongated in a direction crossing the y direction, and is not disposed in a direction orthogonal to the y direction. In order to correct the wound linear elastic body 7 to a direction orthogonal to the y direction (x direction), for example, as shown in FIG. 2, in the case of winding the linear elastic body 7, in the conveying belt 12 The rotation speed of the upper conveyance belt 12a is slower than the rotation speed of the lower conveyance belt 12b, and the rotation speed of the lower conveyance belt 13b is slower than the rotation speed of the upper conveyance belt 13a in the conveyance belt 13, thereby being oriented in the y direction During the conveyance, the inclination of the linear elastic body 7 is gradually changed until the inclination of the linear elastic body 7 is corrected to be orthogonal to the y direction until being conveyed between the pair of belt-like sheets 50 and 60. Direction (x direction).

As shown in FIG. 2, the strip-shaped sheet body 50 is folded in front of the outer surface side in the x-direction by a folding guide (not shown) or the like, and the self-transporting belt 12 (upper layer conveyance) The upper layer side of the belt 12a, the lower conveyance belt 12b) and the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) is supplied between the pair of rolls 171 and 172. Further, as shown in FIG. 2, the strip-shaped sheet body 60 is folded by the folding guide (not shown) or the like at both ends in the x direction, and the self-transporting belt 12 is The upper layer side of the upper conveyance belt 12a and the lower conveyance belt 12b) and the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) are supplied between the pair of rolls 171 and 172. Further, the strip-shaped sheet body 50 and/or the strip-shaped sheet body 60 are coated with an adhesive on the inner surface side before being supplied between the pair of rolls 171 and 172. The coating of the subsequent agent may be applied to the entire surface in a spiral shape or in a planar or striped shape.

Then, the linear elastic body 7 is fixed to the pair of belt-like sheets 50 and 60 in an extended state by the rolls 171 and 172 (integration step). In the integration step, the linear elastic body 7 is adhered between the strip-shaped sheets 50 and 60 while the linear elastic body 7 is wound around the pair of conveyor belts 12 and 13. As will be described in detail, a continuous body in which the linear elastic body 7 that is continuously wound is disposed between the pair of belt-like sheets 50 and 60 is supplied between a pair of rolls 171 and 172 to make the linear elasticity. The body 7 is fixed between the pair of strip-shaped sheets 50, 60 in an extended state. In the manufacturing apparatus 11A, the linear elastic body 7 is supplied between the pair of belt-like sheets 50 and 60 via the rolls 171 and 172 while being held around the conveyance belts 12 and 13, so that the linear elastic body 7 is protected from the linear elasticity. The effect of the cutting of the body 7 is surely inserted into the fixed position.

Then, a portion of the linear elastic body 7 extending from both end portions in the width direction (x direction) of the pair of strip-shaped sheets 50 and 60 is cut (cutting step). In the cutting step, the cutting mechanism (the press-cut slitting roller 183 and the anvil roller 184) disposed on the inner side of the pair of conveying belts 12 and 13 is wound around the linear elastic body 7 to the pair of conveying belts 12, The linear elastic body 7 is cut in the state of 13. Further, in the cutting step, the mechanism for pressing only the portion of the linear elastic body 7 extending from the upper direction is cut while being stretched, and the extended portion of the linear elastic body 7 is removed. As will be described in detail, the state in which the linear elastic body 7 is wound around the pair of conveying belts 12, 13 by the press-cut slitting rolls 183 and the anvil rolls 184 including the cutting blade 185 is shown in FIG. Next, the portion of the linear elastic body 7 located further outward of the outer ends of the strip-like sheets 50 and 60 in the x direction is the linear elastic body 7 which is not fixed between the pair of strip-shaped sheets 50, 60. That is, the remaining portion of the linear elastic body 7 is cut. As shown in FIGS. 4 and 6, in the manufacturing apparatus 11A, the pressing belt 191 which is brought into contact with the area of one of the outer circumferences of the cutter receiving portion 187 of the anvil roll 184 and which is rotated in conjunction with the rotation of the anvil roll 184 is shown. Therefore, the linear elastic body 7 can be cut by the cutting blade 185 while pressing the portion of the linear elastic body 7 which is extended from the upper direction, so that the unnecessary portions of the ends of the linear elastic body 7 are respectively required. It is as short as possible to enhance the aesthetics of the stretchable sheet produced. Further, by pressing the belt 191, it is possible to convey the unnecessary portions of the linear elastic body 7 cut by the cutter 185 to the suction portions 195 and 195 while being pressed between the cutter receiving portions 187. The manufacturing apparatus 11A is soiled to prevent an unnecessary portion of the cut linear elastic body 7 from being mixed into the product.

Then, both ends of the strip-shaped sheets 50 and 60 which are folded outward on the outer surface side are folded by the folding guide (not shown) or the like, and are continuously formed in a pair of belts. Between the sheets 50 and 60, the linear elastic body 7 is fixed to a strip-shaped stretchable sheet in a state of being elongated in a direction crossing the y direction. The so-called "folding" refers to the unfolding of the fold. The above-described belt-shaped stretchable sheet body is intermittently cut in the x direction by a well-known cutting mechanism (not shown). The interval of intermittent cutting is the same as the size of the waist flap 3 included in the diaper 1. Thereby, the waist flap 3 (stretchable sheet) can be continuously manufactured.

As a manufacturing method of the diaper 1 including the waist flap 3, a continuum of the absorbent body 2 is produced in another step by a well-known method, and the continuous system of the absorbent body 2 is a continuous body of the front sheet 21. A plurality of absorbers 23, 23, ... are disposed intermittently between the continuous body of the back sheet 22 and the continuous body of the two sheets 21 and 22 in the transport direction (y direction), and are disposed along the front sheet 21 A plurality of elastic members 25 and a continuous body of the sheet for forming the three-dimensional protective sheet which are elongated on both sides in the transport direction (y direction) of the continuous body. A continuous body of the diaper 1 is produced by transporting the continuous body of the absorbent body 2 produced in the transport direction (y direction) to the continuum of the absorbent body 2 so as to protrude outward in the x direction. Each of the absorbent bodies 23 included is provided with a pair of waist flaps 3. Here, the conveying direction (y direction) of the continuous body of the absorbent main body 2 is the same direction as the conveying direction (y direction) when the waist flap 3 (stretchable sheet body) is manufactured, and it is not necessary to make the waist flap 3 (stretchability) The sheet is rotated by 90°. Thereafter, the continuous body is cut into the size of each diaper 1 by a well-known cutting mechanism (not shown) to manufacture the diaper 1.

In the dicing step of the present invention, it is preferable that the lengths of the linear elastic bodies included in the stretchable sheet body to be formed are cut from both ends in the width direction of the pair of strip-shaped sheets. Extend the part.

In the second preferred embodiment of the method for producing a stretchable sheet of the present invention, a case where the waist flap 3 (stretchable sheet) of the diaper 1 is manufactured is used as an example, and one side is referred to the drawing. Be explained.

FIG. 7 and FIG. 8 are views schematically showing the manufacturing apparatus 11B which can be preferably used in the method of manufacturing the waist panel 3 (stretchable sheet) of the second embodiment.

The manufacturing apparatus 11B of the second embodiment will be described with respect to the manufacturing apparatus 11A. The aspect which is not particularly described is the same as that of the manufacturing apparatus 11A, and the description of the manufacturing apparatus 11A can be suitably applied. In addition, in FIGS. 7 and 8, the same portions as those in FIGS. 2 to 6 are denoted by the same reference numerals.

As shown in FIGS. 7 and 8, the manufacturing apparatus 11B includes a pair of upper and lower sheet conveying belts 150 and 160, and the pair of upper and lower sheet conveying belts 150 and 160 are configured to extend the elastic body 7 by the integrated mechanism 17. The composite sheet in which the state is fixed between the pair of strip-shaped sheets 50 and 60 is transferred between a pair of press-cut slitting rolls 183 and anvil rolls 184.

As shown in Fig. 8, the sheet conveying belt 150 is disposed between the cutting blades 185 and 185 of the press-cut slitting roller 183 in the x direction, and is disposed between the rollers 150a and 150b disposed in the x direction in the direction of the rotation axis. . A servo motor (not shown) is attached to each of the driving units of the rollers 150a and 150b, and the rotation speed of the sheet conveying belt 150 is controlled by a control unit (not shown). The roller 150a is located on the downstream side of the press-cut slitting roller 183 in the y direction, and the roller 150b is located on the upstream side of the press-cut slitting roller 183 in the y direction.

As shown in Fig. 8, the sheet conveying belt 160 is disposed between the cutting blades 185 and 185 of the press-cutting slitting roller 183 in the x direction, and is disposed between the rollers 160a and 160b disposed in the x direction in the direction of the rotation axis. . A servo motor (not shown) is attached to each of the driving units of the rollers 160a and 160b, and the rotation speed of the conveyor belt 160 is controlled by a control unit (not shown). The roller 160a is located further downstream than the anvil roll 184 in the y direction, and the roller 160b is located further upstream than the anvil roll 184 in the y direction.

Next, a method of manufacturing the stretchable sheet using the above-described manufacturing apparatus 11B will be described. In the second embodiment, the description of the first embodiment will be appropriately applied to the aspects that are not particularly described.

First, in the same manner as in the first embodiment, the linear elastic body 7 is continuously discharged, and the discharged linear elastic body 7 is introduced into the elastic body winding rotary arm 14 (supply step), and then, the rotary arm 14 is used. The linear elastic body 7 is continuously wound around the pair of conveyor belts 12 and 13, and the linear elastic body 7 is conveyed by the pair of conveyor belts 12 and 13 (transporting step), and then the rollers 171 and 172 are used to wire the line. The elastic body 7 is fixed between the pair of belt-like sheets 50 and 60 in an extended state (integration step). Then, as shown in FIG. 7, in the second embodiment, the composite sheet in which the linear elastic body 7 is fixed between the strip-shaped sheets 50 and 60 in an extended state is sandwiched between the rollers 150a. The conveyor belt 150 between the 150b and the conveyor belt 160 spanned between the rollers 160a and 160b is supplied between the pair of press-cut slitting rolls 183 and the anvil rolls 184. By using the following mechanism, the linear elastic body 7 can be stretched without exceeding the required degree, and can be stably cut while maintaining the stretched state, and the mechanism holds the linear elasticity on one side. The composite body of the body 7 is fixed between the strip-shaped sheets 50 and 60 in an extended state, and the composite sheet is supplied between a pair of press-cut slitting rolls 183 and anvil rolls 184 from above. The portion of the linear elastic body 7 that is extended is pressed in the lower direction (cutting step).

Then, in the second embodiment, the linear elastic body can be continuously produced between the pair of strip-shaped sheets 50 and 60 by the same steps as in the first embodiment (see FIG. 7). 7 is a strip-shaped stretchable sheet body which is fixed in a state of being elongated in a direction crossing the y direction.

In the third preferred embodiment of the method for producing a stretchable sheet of the present invention, a case where the waist flap 3 (stretchable sheet) of the diaper 1 is produced is taken as an example, and one side is referred to the drawing. Be explained.

FIG. 9 and FIG. 10 are views schematically showing a manufacturing apparatus 11C which can be preferably used in the method of manufacturing the waist panel 3 (stretchable sheet) of the third embodiment.

The manufacturing apparatus 11C of the third embodiment will be described with respect to the manufacturing apparatus 11A. The aspect which is not particularly described is the same as that of the manufacturing apparatus 11A, and the description of the manufacturing apparatus 11A can be suitably applied. In addition, in FIGS. 9 and 10, the same portions as those in FIGS. 2 to 6 are denoted by the same reference numerals.

As shown in Fig. 9, the manufacturing apparatus 11C is on the inner peripheral side of the pair of press-cut slitting rolls 183 and anvil rolls 184 in the x direction and the inner side of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b). The x-direction outer end between the pair of press-cut slitting rolls 183 and the anvil roll 184 and the inner peripheral side of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) are provided in the z direction. Pair of conveyor belts 193, 194. Since the pair of upper and lower conveyor belts 193 and 194 are formed bilaterally symmetrically, in the following description, one conveyor belt 193 and 194 will be described.

As shown in Fig. 9, the conveyor belt 193 is placed between the rollers 193a and 193b arranged in the x-direction in the direction of the rotation axis. A servo motor (not shown) is attached to each of the driving portions of the rollers 193a and 193b, and the rotation speed of the conveyor belt 193 is controlled by a control unit (not shown). The roller 193a is located on the downstream side of the center of the rotary shaft of the press-cut slitting roller 183 in the y direction, and the roller 193b is located on the upstream side of the center of the rotary shaft of the press-cut slitting roller 183 in the y direction. At the office.

As shown in Fig. 9, the conveyor belt 194 is placed between the rollers 194a and 194b arranged in the x direction in the direction of the rotation axis. A servo motor (not shown) is attached to each of the driving portions of the rollers 194a and 194b, and the rotation speed of the conveyor belt 194 is controlled by a control unit (not shown). The roller 194a is disposed between the roller 193a on which the conveyor belt 193 is placed and the roller 193b in the y direction, and is disposed at substantially the same position as the center of the rotation axis of the anvil roller 184. The roller 194b is located on the upstream side of the roller 193b of the conveyor belt 193 in the y direction. The lower end in the z direction of the roller 193a on which the conveyor belt 193 is placed and the lower end in the z direction of the roller 193b are respectively located at the upper end in the z direction of the roller 194a on which the conveyor belt 194 is placed and the upper end in the z direction of the roller 194b. Therefore, the conveyor belt 193 spanned between the rollers 193a and 193b and the conveyor belt 194 spanned between the rollers 194a and 194b are in contact with each other over a part of the area, and the linear elastic body 7 is fixed to the belt-shaped sheet body 50 in an extended state. The remaining portion of the linear elastic body 7 existing on the outer side in the x direction of the composite sheet formed between 60 is sandwiched between the conveyor belt 193 and the conveyor belt 194.

Next, a method of manufacturing the stretchable sheet using the above-described manufacturing apparatus 11C will be described. In the third embodiment, the description of the first embodiment will be appropriately applied to the aspects which are not particularly described.

First, in the same manner as in the first embodiment, the linear elastic body 7 is continuously discharged, and the discharged linear elastic body 7 is introduced into the elastic body winding rotary arm 14 (supply step), and then, the rotary arm 14 is used. The linear elastic body 7 is continuously wound around the pair of conveyor belts 12 and 13, and the linear elastic body 7 is conveyed by the pair of conveyor belts 12 and 13 (transporting step), and then the rollers 171 and 172 are used. The linear elastic body 7 is fixed between the pair of belt-like sheets 50 and 60 in an extended state (integration step). Then, as shown in FIG. 9 and FIG. 10, in the third embodiment, the linear elastic body 7 is fixed to the outer side in the x direction of the composite sheet body between the strip-shaped sheets 50 and 60 in an extended state. The remaining portion of the linear elastic body 7 present is sandwiched between the conveyor belt 193 and the conveyor belt 194, and is pressed from the upper direction and the lower direction, and the remaining portion of the linear elastic body 7 is supplied to a pair of press-cut longitudinal Between the cutting roller 183 and the anvil roller 184. As shown in Fig. 9, in the manufacturing apparatus 11C, the linear elastic body 7 can be cut by the cutter 185 while the portion of the extended linear elastic body 7 is sandwiched between the conveyor belt 193 and the conveyor belt 194. The unnecessary portions of the respective ends of the linear elastic body 7 are made as short as each other, thereby improving the aesthetics of the manufactured stretchable sheet body. Further, since the unnecessary portion of the linear elastic body 7 cut by the cutter 185 can be conveyed to the suction portions 195 and 195 by the conveyor belt 193 and the conveyor belt 194, the manufacturing apparatus 11C is less likely to be soiled.

Thereafter, in the third embodiment, the linear elastic body 7 can be continuously fixed between the pair of strip-shaped sheets 50 and 60 by the same steps as in the first embodiment. A strip-shaped stretchable sheet in a state in which the direction of the y direction is elongated.

In the fourth preferred embodiment of the method for producing a stretchable sheet of the present invention, a case where the waist flap 3 (stretchable sheet) of the diaper 1 is produced is taken as an example, and one side is referred to the drawing. Be explained.

FIG. 11 and FIG. 12 are views schematically showing a manufacturing apparatus 11D that can be preferably used in the method of manufacturing the waist panel 3 (stretchable sheet) of the fourth embodiment.

The manufacturing apparatus 11D of the fourth embodiment will be described with respect to the manufacturing apparatus 11A. The aspect which is not particularly described is the same as that of the manufacturing apparatus 11A, and the description of the manufacturing apparatus 11A can be suitably applied. In addition, in FIGS. 11 and 12, the same portions as those in FIGS. 2 to 6 are denoted by the same reference numerals.

Unlike the manufacturing apparatus 11A of the first embodiment, the manufacturing apparatus 11D of the fourth embodiment includes a cutting mechanism 18 that fixes the linear elastic body 7 to the pair of strip-shaped sheets 50 in an extended state. At the same time, at the same time, the portion of the linear elastic body 7 that has been extended is cut while being stretched.

As shown in FIGS. 11 and 12, the cutting mechanism 18 of the manufacturing apparatus 11D includes a pair of rolls 171 and 172. As the pair of rolls 171 and 172, a cylindrical roll made of metal or a cylindrical roll made of low-hardness rubber can be used. A servo motor (not shown) is attached to each of the driving units of either of the pair of rolls 171 and 172, and the rotation speed is controlled by a control unit (not shown). A gear for driving transmission is attached to each of the pair of rolls 171 and 172 on the rotating shaft. The rotation speed of the servo motor (not shown), that is, the rotation speed of one of the rolls 171 and 172, can be controlled by the drive mechanism (not shown) in accordance with the production speed of the stretchable sheet. At this time, the driving force can be transmitted to the other rolls 172 and 171 by the gear meshing for driving transmission, and the pair of rolls 171 and 172 can be rotated. In order to securely fix the linear elastic body in the extended state between the pair of strip-shaped sheets 50 and 60 in the bearing portions of the pair of rolls 171 and 172, the force of hydraulic pressure, air pressure, spring, etc. is used. The respective bearings are partially pressurized.

The rolls 171 and 172 of the production amount 11D are located between the inner peripheral side of the conveyor belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the inner peripheral side of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b). . As shown in FIG. 12, in the manufacturing apparatus 11D, the upper side roll 171 has the cutting blades 176 and 176 over the circumferential direction on the circumferential surface of each of the outer sides in the x direction. In the manufacturing apparatus 11D, the cutting blade 176 is located further outward in the x-direction outer end of the strip-like sheets 50, 60 which are folded outward from the outer surface side.

As shown in FIG. 12, in the manufacturing apparatus 11D, the lower side roll 172 is a roll which is longer than the roll 171 in the x direction, and is provided at a position corresponding to the cutting knives 176, 176 of the upper side roll 171. Cutter receiving portions 178, 178. The rolls 172 are provided with extending portions 179 and 179 at both end portions in the x direction on the outer side in the x direction from the cutter receiving portions 178 and 178.

When viewed from the side, the cutter receiving portions 178, 178 have a circular shape, and the diameter of the cutter receiving portion 178 is substantially the same as the diameter of the center of the roll 172 in the x direction.

The extended portion 179 has a circular shape when viewed from the side.

As described above, in the first embodiment, the rolls 171 and 172 are both the integrated mechanism 17 and the cutting mechanism 18.

As shown in FIGS. 11 and 12, in the manufacturing apparatus 11D, the pressing belts 191 and 191 of the linear elastic body 7 are disposed on the upper side of the extending portions 179 and 179 on both outer sides in the x direction of the roll 172. Since the pressing belts 191 and 191 are formed bilaterally symmetrically, in the following description, a pressing belt 191 will be described.

As shown in FIG. 11, the press belt 191 is bridged between the pulleys 191a, 191b, and 191c arranged in the x direction in the rotation axis direction. The pulley 191a is located on the downstream side of the roll 172, the pulley 191c is located on the upstream side of the roll 172, and the pulley 191b is located on the upstream side of the pulley 191c. The lower end of the pulley 191a in the z direction and the lower end of the pulley 191c in the z direction are located below the upper end in the z direction of the extended portion 179 of the roll 172. Therefore, the pressing belt 191 spanned between the pulleys 191a, 191b, and 191c is in contact with a portion of the outer circumference of the extended portion 179 of the roll 172, and is rotated in conjunction with the rotation of the roll 172.

Next, a method of manufacturing the stretchable sheet using the above-described manufacturing apparatus 11D will be described. In the fourth embodiment, the description of the first embodiment will be appropriately applied to the aspects which are not particularly described.

First, in the same manner as in the first embodiment, the linear elastic body 7 is continuously discharged, and the discharged linear elastic body 7 is introduced into the elastic body winding rotary arm 14 (supply step), and then, the rotary arm 14 is used. The linear elastic body 7 is continuously wound around the pair of conveyor belts 12 and 13, and the linear elastic body 7 is conveyed by the pair of conveyor belts 12 and 13 (transporting step). Then, in the fourth embodiment, the linear elastic body 7 is fixed between the pair of strip-shaped sheets 50 and 60 in an extended state (integration step), and at the same time, the linear elastic body is extended. Part 7 is cut while being stretched (cutting step). As will be described in detail, a continuous body in which the linearly wound elastic body 7 is continuously disposed between the pair of strip-shaped sheets 50 and 60 is supplied between a pair of rolls 171 and 172, and the linear elasticity is obtained. The body 7 is fixed between the pair of strip-shaped sheets 50, 60 in an extended state. As shown in FIG. 12, in the manufacturing apparatus 11D, the portion of the linear elastic member 7 elongated in the x direction is not fixed to the pair of strip-shaped sheets 50 by the roll 171 including the cutting blade 176 and the roll 172. The 60-line linear elastic body 7, that is, the remaining portion of the linear elastic body 7, is cut while being stretched. As shown in Figs. 11 and 12, in the manufacturing apparatus 11D, since the pressing belt 191 which is in contact with a portion of the outer circumference of the extending portion 179 of the roll 172 and which rotates in conjunction with the rotation of the roll 172, is provided, It is true that only the portion of the linear elastic body 7 elongated in the x direction is pressed from the upper direction, and the linear elastic body 7 is cut by the cutting blade 176, so that the unnecessary portions of the ends of the linear elastic body 7 are the same. It is short, which enhances the aesthetics of the stretchable sheet produced. Further, since the unnecessary portion of the linear elastic body 7 cut by the cutting blade 176 can be conveyed to the suction portions 195 and 195 by the pressing belt 191, the manufacturing apparatus 11D is less likely to be soiled.

Thereafter, in the fourth embodiment, the linear elastic body 7 can be continuously fixed between the pair of strip-shaped sheets 50 and 60 by the same steps as in the first embodiment. A strip-shaped stretchable sheet in a state in which the direction of the y direction is elongated.

In the fifth preferred embodiment of the method for producing a stretchable sheet of the present invention, a case where the waist flap 3 (stretchable sheet) of the diaper 1 is produced is taken as an example, and one side is referred to the drawing. Be explained.

FIG. 13 and FIG. 14 are views schematically showing a manufacturing apparatus 11E which can be preferably used in the method of manufacturing the waist panel 3 (stretchable sheet) of the fifth embodiment.

The manufacturing apparatus 11E of the fifth embodiment will be described with respect to the manufacturing apparatus 11A. The aspect which is not particularly described is the same as that of the manufacturing apparatus 11A, and the description of the manufacturing apparatus 11A can be suitably applied. In addition, in FIGS. 13 and 14, the same portions as those in FIGS. 2 to 6 are denoted by the same reference numerals.

The manufacturing apparatus 11E of the fifth embodiment is different from the manufacturing apparatus 11A of the first embodiment, and includes a cutting mechanism 18 that fixes the linear elastic body 7 to the pair of strip-shaped sheets 50 in an extended state. At the same time, at the same time, the portion of the linear elastic body 7 that has been extended is cut while being stretched.

As shown in FIGS. 13 and 14, the cutting mechanism 18 of the manufacturing apparatus 11E includes a pair of rolls 171 and 172. As the pair of rolls 171 and 172, a cylindrical roll made of metal or a cylindrical roll made of low-hardness rubber can be used. A servo motor (not shown) is attached to each of the driving units of either of the pair of rolls 171 and 172, and the rotation speed is controlled by a control unit (not shown). A gear for driving transmission is attached to each of the pair of rolls 171 and 172. The rotation speed of the servo motor (not shown), that is, the rotation speed of one of the rolls 171 and 172 can be controlled by the drive mechanism (not shown) in accordance with the production speed of the stretchable sheet. At this time, the driving force can be transmitted to the other rolls 172 and 171 by the gear meshing for driving transmission, and the pair of rolls 171 and 172 can be rotated. In order to securely fix the linear elastic body in the extended state between the pair of strip-shaped sheets 50 and 60 in the bearing portions of the pair of rolls 171 and 172, the force of hydraulic pressure, air pressure, spring, etc. is used. The respective bearings are partially pressurized.

The rolls 171 and 172 of the manufacturing apparatus 11E are located between the inner peripheral side of the conveyor belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the inner peripheral side of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b). As shown in FIG. 14, in the manufacturing apparatus 11E, the upper side roll 171 is provided with the cutting blades 176 and 176 in the circumferential direction on the circumferential surface of each of the outer sides in the x direction. In the manufacturing apparatus 11E, the cutter blade 176 is located further outward in the x-direction outer end of the strip-like sheets 50 and 60 which are folded outward from the outer surface side.

As shown in Fig. 14, in the manufacturing apparatus 11E, the lower roll 172 is provided with cutter receiving portions 178 and 178 at positions corresponding to the cutting blades 176 and 176 of the upper roll 171. When viewed from the side, the cutter receiving portions 178, 178 have a circular shape, and the diameter of the cutter receiving portion 178 is substantially the same as the diameter of the center of the roll 172 in the x direction.

As described above, in the first embodiment, the rolls 171 and 172 are also the integrated mechanism 17, and are also the cutting mechanism 18.

As shown in FIG. 13 and FIG. 14, in the manufacturing apparatus 11E, the edge between the outer end portions of the pair of rolls 171 and 172 in the x direction and the inner side of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) The z-direction includes a pair of conveyor belts 193 and 194, and has an upper and lower side in the z direction between the outer end portions of the pair of rolls 171 and 172 in the x direction and the inner peripheral side of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b). Pair of conveyor belts 193, 194. Since the pair of upper and lower conveyor belts 193 and 194 are formed bilaterally symmetrically, in the following description, one conveyor belt 193 and 194 will be described.

As shown in Fig. 13, the conveyor belt 193 is placed between the rollers 193a and 193b arranged in the x direction in the direction of the rotation axis. A servo motor (not shown) is attached to each of the driving portions of the rollers 193a and 193b, and the rotation speed of the conveyor belt 193 is controlled by a control unit (not shown). The roller 193a is located on the downstream side of the center of the rotation axis of the roll 171 in the y direction, and the roller 193b is located on the upstream side of the center of the rotation axis of the roll 171 in the y direction.

As shown in Fig. 13, the conveyor belt 194 is placed between the rollers 194a and 194b arranged in the x direction in the direction of the rotation axis. A servo motor (not shown) is attached to each of the driving portions of the rollers 194a and 194b, and the rotation speed of the conveyor belt 194 is controlled by a control unit (not shown). The roller 194a is disposed between the roller 193a on which the conveyor belt 193 is placed and the roller 193b in the y direction, and is disposed at substantially the same position as the center of the rotation axis of the roller 172. The roller 194b is located on the upstream side of the roller 193b of the conveyor belt 193 in the y direction. The lower end in the z direction of the roller 193a on which the conveyor belt 193 is placed and the lower end in the z direction of the roller 193b are respectively located at the upper end in the z direction of the roller 194a on which the conveyor belt 194 is disposed and the lower end in the z direction of the roller 194b. Therefore, the conveyor belt 193 spanned between the rollers 193a, 193b and the conveyor belt 194 spanned between the rollers 194a, 194b are in contact with each other over a portion of the belt, and the elastic body 7 is fixed to the pair of belt-like sheets 50 in an extended state. The remaining portion of the linear elastic body 7 existing on the outer side in the x direction of the composite sheet formed between 60 and 60 is sandwiched between the conveyor belt 193 and the conveyor belt 194.

Next, a method of manufacturing a stretchable sheet using the above-described manufacturing apparatus 11E will be described. In the fifth embodiment, the description of the first embodiment will be appropriately applied to the aspects which are not particularly described.

First, in the same manner as in the first embodiment, the linear elastic body 7 is continuously discharged, and the discharged linear elastic body 7 is introduced into the elastic body winding rotary arm 14 (supply step), and then, the rotary arm 14 is used. The linear elastic body 7 is continuously wound around the pair of conveyor belts 12 and 13, and the linear elastic body 7 is conveyed by the pair of conveyor belts 12 and 13 (transporting step). Then, in the fifth embodiment, the linear elastic body 7 is fixed between the strip-shaped sheets 50 and 60 in an extended state, and at the same time, the stretched portion of the linear elastic body 7 is kept elongated. The state is cut on one side (cutting step). As will be described in detail, a continuous body in which the linearly wound elastic body 7 is continuously disposed between the pair of strip-shaped sheets 50 and 60 is supplied between a pair of rolls 171 and 172, and the linear elasticity is obtained. The body 7 is fixed between the pair of strip-shaped sheets 50, 60 in an extended state. As shown in FIG. 14, in the manufacturing apparatus 11E, the portion of the linear elastic member 7 elongated in the x direction is not fixed to the pair of strip-shaped sheets 50 by the roll 171 including the cutting blade 176 and the roll 172. The 60-line linear elastic body 7, that is, the remaining portion of the linear elastic body 7, is cut while being stretched. As shown in Fig. 13 and Fig. 14, in the manufacturing apparatus 11E, the portion of the linear elastic body 7 elongated in the x direction can be pressed between the conveyor belt 193 and the conveyor belt 194, and pressed from the upper direction and the lower direction. Further, the linear elastic body 7 is cut by the cutter 176, so that the unnecessary portions of the both ends of the linear elastic body 7 are as short as each other, thereby improving the aesthetics of the manufactured stretchable sheet. Further, since the unnecessary portions of the linear elastic body 7 cut by the cutter 176 can be conveyed to the suction portions 195 and 195 by the conveyor belt 193 and the conveyor belt 194, the manufacturing apparatus 11E is less likely to be soiled.

Thereafter, in the fifth embodiment, the linear elastic body 7 can be continuously fixed between the pair of strip-shaped sheets 50 and 60 by the same steps as in the first embodiment. A strip-shaped stretchable sheet in a state in which the direction of the y direction is elongated.

Next, another preferred embodiment of the method for producing a stretchable sheet of the present invention will be described with reference to Figs. The sixth and seventh embodiments of the method for producing a stretchable sheet of the present invention are continuously manufactured between a pair of strip-shaped sheets 50 and 60 to fix the linear elastic body 7 along the strip-shaped sheet. A method of manufacturing a stretchable sheet of the stretchable sheet 3 in which the direction in which the transport direction intersects is extended. Further, the sixth and seventh embodiments of the method for producing a stretchable sheet of the present invention include a fixing step (an integrated step of the present invention) which uses the elastic winding mechanism 14 to continuously form the linear elastic body 7. The ground is wound around a pair of conveyor belts 12 and 13 (line transporting long structure), and the pair of conveyor belts 12 and 13 (line transporting long structure) are conveyed in the longitudinal direction. After the linear elastic body 7, the strip-shaped elastic body 7 is sandwiched between the strip-shaped sheets 50 and 60, and the first cutting step is performed after the fixing step, and the strip-shaped sheet body 50 is cut from the linear elastic body 7. a portion in which both end edges of the width direction of 60 extend, and the winding state of the linear elastic body with respect to the pair of conveyor belts 12 and 13 (line transporting long structure) is canceled; and the second cutting step After the first cutting step, the entire or a part of the portion 272 of the linear elastic body 7 extending from both end edges in the width direction of the strip-shaped sheet bodies 50, 60 is removed by cutting.

As shown in Fig. 15, the stretchable sheet system produced in the sixth and seventh embodiments is used, for example, for the waist flap 3 of the unfolded disposable diaper 1'. The unfolded disposable diaper 1' (hereinafter also referred to as "diaper 1'") shown in Fig. 15 has a slightly different length than the linear elastic body 7 in the waist flap 3, and has the same as Fig. 1 The diaper 1 shown has the same composition. The above description of the diaper 1 can be applied similarly to the diaper 1', except for the diaper 1, which is not particularly described.

Next, in a sixth preferred embodiment of the method for producing a stretchable sheet of the present invention, a case where the waist flap 3 (stretchable sheet) of the diaper 1' is produced is taken as an example, and reference is made to the drawings. Explain on one side.

Fig. 16 is a view schematically showing a manufacturing apparatus 11 for a stretchable sheet which can be preferably used in a method for producing a waist panel 3 (stretchable sheet) according to a sixth embodiment. Fig. 17 is a view schematically showing an example of a cutting mechanism for performing a second cutting step on the stretchable sheet 3A manufactured in the manufacturing apparatus 11 shown in Fig. 16 .

The manufacturing apparatus 11 shown in Fig. 16 is a device for continuously manufacturing the elastic sheet 3A for the waist panel 3, and includes continuously winding the linear elastic body 7 to the conveying direction with the sheet (y direction). A rotating arm (elastic winding mechanism) 14 for winding the elastic body of the conveyor belts 12 and 13 in the orthogonal direction (x direction). Further, as shown in FIGS. 16 and 17, the manufacturing apparatus 11 includes an elastic body supply mechanism 15 that continuously discharges the linear elastic body 7, and introduces the linear elastic body 7 into the rotating arm 14 in an extended state; The mechanism 16 transports the linear elastic body 7 between the pair of belt-shaped sheets 50 and 60 by the pair of conveyor belts 12 and 13, and the integration mechanism 17 uses a pair of rolls 171 and 172. The linear elastic body 7 in the extended state is fixed between the pair of strip-shaped sheets 50, 60; and the cutting mechanism 218 cuts the line extending from the both ends in the width direction of the strip-shaped sheets 50, 60. Elastomer 7 .

In one aspect of the present embodiment, the transporting belts 12 and 13 are used for the linear transporting long structure, and the longitudinal direction of the linear transporting long structural body is the extending direction (y direction) of the two transporting belts 12 and 13.

In the manufacturing apparatus 11 used in the sixth embodiment, the pair of conveyor belts 12 and 13 and the rotating arm (elastic winding mechanism) 14 for elastic body winding, the elastic body supply mechanism 15, the conveying mechanism 16, and the integration Each of the mechanism 17 and the pair of strip-shaped sheets 50 and 60 has the same configuration as that of the user of the above-described manufacturing apparatus 11A, and the above description of the manufacturing apparatus 11A can be suitably applied. In FIGS. 16 to 18, the same portions as those in FIGS. 2 to 6 are denoted by the same reference numerals.

As shown in Fig. 16, the cutting mechanism 218 in the manufacturing apparatus 11 includes a cutter 280 in which the portion of the linear elastic body 7 that is conveyed is a sharp cutting blade (the illustration of the cutter 280 on the side of the conveyance belt 13 is omitted). ). The cutter 280 is disposed at a position where the linear elastic body 7 is in contact with the support body (not shown), and the linear elastic body 7 is conveyed by the conveyance belts 12 and 13 and pressed to the cutter 280. Cut. The cutting mechanism 218 is a pulley 121 and 124 and a conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) which are located in the y direction in the pair of rolls 171 and 172 and the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b). Between the pulleys 131, 134. The position of the linear elastic body 7 in the x direction by the cutting mechanism 218 may be between the rolls 171, 172 and the conveyor belts 12, 13, or between the inner peripheral portion and the outer peripheral portion of each of the conveyor belts 12, 13 It may also be the outer side of the outer circumference of each of the conveyor belts 12 and 13. Further, as the cutting mechanism 218, various well-known persons capable of cutting the linear elastic body 7 can be used without any particular limitation. For example, a cutting roll including a cutting blade having a circumferential direction on the outer peripheral surface and an anvil for receiving the cutting blade can be used. Roller cutters, etc. Further, it is also possible to perform cutting by laser or heat.

The second cutting mechanism 219 shown in Fig. 17 is disposed downstream of the manufacturing apparatus 11 shown in Fig. 16 and performs the second cutting step on the elastic sheet 3A manufactured in the manufacturing apparatus 11. As shown in Fig. 16, the first cutting step is formed by cutting a linear elastic portion which is stretched between the pair of conveying belts 12 and 13 at a portion extending from both end edges of the strip-like sheets 50 and 60 in the width direction. The step of the body 7 is performed by the cutting mechanism 218. In contrast, the second cutting step removes the self-contained sheet in the stretchable sheet 3A which is released by the first cutting step. The step of extending the whole or a part of the portions 272 and 272 extending from the both end edges of the bodies 50 and 60 in the width direction is performed by the second cutting mechanism 219. The portion 272 removed in the second cutting step is usually cut in a contracted state, but may be cut in a state in which it is in an extended state.

As shown in FIG. 17, the second cutting mechanism 219 includes a press-cutting slitting roller 293 and an anvil roller 294. A conveying mechanism (not shown) such as a conveying roller or a conveyor belt is disposed on the upstream and downstream sides of the press-cutting slitting rolls 293 and the anvil rolls 294, and the stretchable sheet body 3A produced in the manufacturing apparatus of Fig. 16 is composed of This conveying mechanism conveys and is introduced between the press-cut slitting roller 293 and the anvil roller 294.

As shown in Fig. 17, the press-cut slitting roller 293 includes two cutting blades 295, 295 which are spaced apart in the axial length direction. The cutter 295 is formed over the entire circumference of the press-cut slitting roller 293, and the interval between the two cutter blades 295 and 295 is a sheet portion in the stretchable sheet body 3A that is conveyed (the belt-like sheet body 50, 60). The width of the width is slightly wider.

As shown in FIG. 17, the anvil roll 294 has a cylindrical outer peripheral surface between the two cutting knives 295 and 295 of the press-cut slitting roll 293.

As shown in FIG. 17, the suction portions 296 and 296 are provided in the vicinity of the second cutting mechanism 219, and the suction portions 296 and 296 are attracted to the press-cut longitudinal slitting roller 293 and the anvil roller by one of the second cutting mechanisms 219. An unnecessary portion 272 of the linear elastic body 7 extending from both ends of the pair of strip-shaped sheets 50, 60 in the width direction is cut by 294. The suction portion 296 is disposed close to a portion where the cutter blade 295 is in contact with the circumferential surface of the anvil roller 294.

Next, a method of manufacturing a stretchable sheet using the above-described manufacturing apparatus 11 or the like will be described.

First, as shown in Fig. 3, the linear elastic body 7 is continuously discharged, and the discharged linear elastic body 7 is introduced into the rotating arm 14 as an elastic body winding mechanism in an extended state.

As described in detail, the linear elastic body 7 is continuously discharged from the bobbin 70 of the wound linear elastic body 7 by using the discharge roller 152. In the present embodiment, the bobbin 70 is not rotated, but may be a rotatable person. At the time of release, the rotation speed or tension of the discharge roller 152 is adjusted by the control unit (not shown) of the manufacturing apparatus 11 based on the detection output of the tension of the linear elastic body 7 by the tension measuring device 153. The brake of the device 151 releases the linear elastic body 7 from the bobbin 70 with a specific tension.

Further, in the present embodiment, the linear elastic body 7 is introduced into the rotary arm 14, and the linear elastic force introduced into the rotary arm 14 (elastic winding mechanism) by the feed roller 156 at the time of introduction is introduced. The speed of the body 7 is adjusted to a fixed speed and introduced. The introduction speed is set to a speed corresponding to the winding speed of the pair of conveyor belts 12, 13.

Then, as shown in FIGS. 16 and 3, the linear elastic body 7 in the extended state is continuously wound around the pair of conveyor belts 12 and 13 by the rotary arm 14, and the pair of conveyor belts 12 and 13 are used to The linearly wound linear elastic body 7 is conveyed between the pair of belt-like sheets 50 and 60. As will be described in detail, the linear elastic body 7 supplied to the rotating arm 14 in the extended state is introduced into the arm portion 141 from the introduction port 145, and is guided by the shaft portion 142, the connecting portion 144, and the surrounding portion 143. Export 146 is exported. The linear elastic body 7 which is led out from the outlet 146 is rolled out to the outer side of the upstream side of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) by rotating the rotary arm 14 while being rotated. The side and the upstream side of the upstream side of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b) are the outer peripheral side. Here, the linear elastic body 7 can be continuously spiraled by the rotation operation of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b). It is wound around the outer peripheral side of the conveyance belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the outer side of the conveyance belt 13 (the upper conveyance belt 13a and the lower conveyance belt 13b). The linearly wound linear elastic body 7 is conveyed to between the pair of belt-like sheets 50 and 60 on the downstream side.

Here, the linear elastic body 7 wound around the pair of conveyor belts 12 and 13 is elongated in a direction crossing the y direction, and is not disposed in a direction orthogonal to the y direction. In order to correct the wound linear elastic body 7 to a direction orthogonal to the y direction (x direction), for example, as shown in FIG. 16, in the case of winding the linear elastic body 7, in the conveyance belt 12 The rotation speed of the upper conveyance belt 12a is slower than the rotation speed of the lower conveyance belt 12b, and the rotation speed of the lower conveyance belt 13b is slower than the rotation speed of the upper conveyance belt 13a in the conveyance belt 13, thereby being oriented in the y direction During the conveyance, the inclination of the linear elastic body 7 is gradually changed until the inclination of the linear elastic body 7 is corrected to be orthogonal to the y direction until being conveyed between the pair of belt-like sheets 50 and 60. Direction (x direction).

As shown in FIG. 16 , the strip-shaped sheet body 50 is previously provided on the outer surface side (both end portions in the x direction) on the outer surface side (not in the strip-shaped sheet body 60) by a seller (not shown) or the like. The upper side of the transfer belt 12 (the upper conveyance belt 12a and the lower conveyance belt 12b) and the conveyance belt 3 (the upper conveyance belt 13a and the lower conveyance belt 13b) are folded up without being joined to the non-opposing side. It is conveyed between a pair of rolls 171 and 172. Further, as shown in Fig. 16, the strip-shaped sheet body 60 is previously provided with a side surface (both end portions in the x direction) on the outer surface side (not in the strip sheet) by a seller (not shown) or the like. The body 50 is folded up on the non-opposing side, and is supplied to the lower layer side from the conveyor belt 12 (the upper conveyor belt 12a and the lower conveyor belt 12b) and the conveyor belt 13 (the upper conveyor belt 13a and the lower conveyor belt 13b). Between the rolls 171, 172. Further, the strip-shaped sheet body 50 and/or the strip-shaped sheet body 60 are coated with an adhesive on the inner surface side before being supplied between the pair of rolls 171 and 172. The coating of the subsequent agent can be applied to the entire surface in a spiral shape or in a full coating.

Then, the linear elastic body 7 is fixed between the pair of belt-like sheets 50 and 60 in an extended state by using the rolls 171 and 172. As will be described in detail, a continuous body in which the linearly wound elastic body 7 is continuously disposed between the pair of strip-shaped sheets 50 and 60 is supplied between a pair of rolls 171 and 172, and the linear elasticity is obtained. The body 7 is fixed between the pair of strip-shaped sheets 50, 60 in an extended state. As described above, the linear elastic body 7 is wound up to a pair of conveyance belts 12 and 13 in a direction (x direction) orthogonal to the conveyance direction of the sheets 50 and 60, and conveyed by a pair. After the belt-shaped elastic body 7 is conveyed and wound by the belts 12 and 13, the step of fixing the linear elastic body 7 between the belt-like sheets 50 and 60 by using the rolls 171 and 172 as described above is the embodiment. The fixed step in the process (integration step).

Then, the linear elastic body 7 extending from both end edges in the width direction (x direction) of the pair of strip-shaped sheets 50 and 60 is cut by the cutter 180 (first cutting step). In the first cutting step, the linear elastic body 7 which is stretched between the pair of conveying belts 12 and 13 and which is in an extended state is cut, and the winding state of the linear elastic body with respect to the pair of conveying belts 12 and 13 is released by the cutting. Thus, the stretchable sheet body 3A in which the linear elastic bodies 7 extend from the both end edges in the width direction of the strip-like sheets 50 and 60 is obtained. The portion of the stretchable sheet body 3A in which the both end edges of the strip-like sheets 50 and 60 extend in the width direction is in a state of being contracted (natural state).

Further, in the present embodiment, the strip-shaped sheets 50 and 60 are folded at both side portions in the longitudinal direction, and the end edges of the strip-shaped sheet in the width direction are folded over.

Then, the stretchable sheet body 3A is conveyed to the second cutting mechanism 219, and the self-retaining sheet body 50 of the linear elastic body 7 in the stretchable sheet body 3A is removed by the second cutting mechanism 219, An integral portion or a portion of the constricted portions 272, 272 extending from both end edges of the width direction of 60.

As shown in Fig. 17, in the second cutting step of the present embodiment, only the linear elastic bodies 7 in the y direction of the stretchable sheet body 3A are cut only in the width direction of the strip-shaped sheets 50, 60. The part of the edge extends. As will be described in detail, as shown in Fig. 17, by cutting the slitting slitting roller 293 and the anvil roller 294 including the cutting blade 295, the cutting is located at both outer ends of the strip-shaped sheets 50, 60 in the x direction. The portion of the linear elastic body 7 on the outer side is the linear elastic body 7 which is not fixed between the pair of strip-shaped sheets 50, 60, that is, the remaining portion of the linear elastic body 7.

This cutting is performed in a state in which the sheet portions (belt sheets 50, 60) in the stretchable sheet 3A are contracted in the width direction by the linear elastic body 7 in addition to the linear elastic body 7. However, the stretched state of the strip-like sheets 50 and 60 can be maintained and transferred directly to the second cutting mechanism. In this state, the contracted portions extending from the both end edges in the width direction of the strip-shaped sheets 50 and 60 can be cut. 272.

By the second cutting step, the contracted portions 272 extending from the both end edges of the strip-like sheets 50 and 60 in the width direction are cut, whereby the unnecessary portions of the both ends of the linear elastic body 7 can be made the same. Short cut cutting removes the aesthetics of the stretchable sheet produced. Moreover, by providing the suction portions 296 and 296, it is possible to prevent the dicing sheet which is caused by the dicing from entering the stretchable sheet body 3 of the linear elastic body 7 or adhere to the rollers 293 and 294 due to the dicing. .

In the second cutting step, it is preferable to prevent the linear elastic body 7 of the stretchable sheet 3A after the fixing step from being cut from the viewpoint of preventing the appearance of the stretchable sheet 3 from being deteriorated due to the extension portion described below. The length L1 of the portion extending from the both end edges in the width direction of the strip-shaped sheet is 0 to 5 mm, particularly 0 to 3 mm. It is also possible to cut the linear elastic body 7 at substantially the same position as the both end edges of the strip-shaped sheets 50, 60 in the width direction, and completely eliminate the portion of the linear elastic body 7 extending from the both end edges.

Then, the both end portions (the both end portions in the x direction) of the strip-shaped sheets 50 and 60 which are folded outward on the outer surface side by the seller (not shown) are spread outward in the width direction, and are The respective unfolded portions are joined to each other by a well-known joining method such as a solvent or a fusion.

By this, the linear elastic body 7 can be continuously produced between the pair of belt-like sheets 50 and 60 so as to be fixed in a state in which the linear elastic body 7 is stretched in a direction crossing the y direction.

Further, the above-described belt-shaped stretchable sheet body is intermittently cut in the x direction by a well-known cutting mechanism (not shown). The interval of intermittent cutting is the same as the size of the waist flap 3 included in the diaper 1'. Thereby, the waist flap 3 (stretchable sheet) can be continuously manufactured.

According to the sixth embodiment, after the first cutting step of releasing the wound state of the linear elastic body 7 with respect to the pair of conveying belts 12 and 13, the linear elastic body is cut in another step different therefrom. 7 is a whole or a part of the constricted portions 272, 272 extending from both end edges of the strip-shaped sheet in the width direction, so that the linear extension of the strip-like sheets 50, 60 in the width direction can be efficiently removed. The unstable portion of the elastomer is used to efficiently produce the stretchable sheet 3 having a good appearance.

When the cutting of the linear elastic body 7 in the wound state of the pair of conveying belts 12 and 13 is performed, it is necessary to cut the portion extending from both end edges in the width direction of the self-belt sheet. After the linear elastic body is maintained, the cutting is performed while the next linear elastic body is not shrunk, and the structure of the cutting mechanism is complicated. On the other hand, in the present embodiment, the cutting of the linear elastic body for releasing the winding state of the pair of conveying belts 12, 13 and the cutting of the unnecessary portion are performed in another step. In the short cut, it is possible to prevent the manufacturing apparatus of the stretchable sheet from being complicated, and to efficiently produce a stretchable sheet having a good appearance in which an unnecessary portion is removed.

In the sixth embodiment, the strip-shaped sheet body 50 having a narrow width is formed by folding both end portions in the width direction (both end portions in the x direction) toward the outer surface side (non-opposing surface side). 60. After performing the fixing step, the first cutting step, and the second cutting step, the folded portions of the strip-shaped sheets 50 and 60 are unfolded, and the unfolded portions 50A, 60A of the pair of strip-shaped sheets are mutually By joining, as shown in Fig. 17, the stretchable sheet body 3 in which the linear elastic body 7 does not extend from both ends of the strip-shaped sheet body is obtained. Therefore, even in the second cutting step, the constricted portion 272 of the linear elastic body 7 is cut so as to retain a portion in which the both end edges of the self-contained sheet body extend in the width direction, in the finally obtained stretchable sheet body 3. The extension is also almost inconspicuous.

As a method of manufacturing the diaper 1' including the waist flap 3, a continuum of the absorbent body 2 is produced in a further step by a well-known method, and the continuous system of the absorbent body 2 is continuous in the front sheet 21. A plurality of absorbers 23, 23, ... are arranged intermittently between the continuous body of the body and the back sheet 22 and the continuous body of the two sheets 21 and 22 in the transport direction (y direction), and are disposed along the front sheet A plurality of elastic members 25 and a continuous body of the sheet for forming the three-dimensional protective sheet which are elongated on both sides of the transport direction (y direction) of the continuum of 21.

A continuum of the diaper 1' is produced by transporting the continuum of the manufactured absorbent body 2 in the transport direction (y direction) and aligning the absorbing body 2 so as to protrude outward in the x direction. Each of the absorbers 23 included in the pair is provided with a pair of waist fins 3. By forming the waist panel 3 from the stretchable sheet produced as described above, it is easy to prevent the linear elastic body 7 from being present in the joint portion with the absorbent body 2, and it is also advantageous in that the sealing property is good. Here, the conveying direction (y direction) of the continuous body of the absorbent main body 2 is the same direction as the conveying direction (y direction) when the waist flap 3 (stretchable sheet body) is manufactured, and it is not necessary to make the waist flap 3 (stretchability) The sheet is rotated by 90°. Thereafter, the continuous body can be cut into the size of each diaper 1' by a well-known cutting mechanism (not shown) to produce a diaper 1'.

Next, a seventh embodiment of the present invention will be described. The seventh embodiment is mainly described with respect to the sixth embodiment, and the same reference numerals will be given to the same points, and the description thereof will be omitted. The aspect which is not specifically described can be set to be the same as the above embodiment.

As shown in Fig. 18, in the seventh embodiment, as the second cutting mechanism, a plough head cutter 219A including two sliding knives that are moved by one or both sides is used. The plough head cutter 219A is disposed on both sides of the stretchable sheet body 3A, and respectively sandwiches the linear elastic body 7 between the two knives as a pusher, and applies a shearing force to the linear elastic body 7 Cut. In the seventh embodiment, the same effects as those in the sixth embodiment can be obtained.

The method for producing the stretchable sheet of the present invention is not limited to the above-described first, second, third, fourth, fifth, sixth, and seventh embodiments, and can be appropriately changed.

For example, in the manufacturing apparatuses 11A, 11B, and 11D used in the manufacturing methods of the first, second, and fourth embodiments, the pressing unit 191 is provided as a mechanism for pressing from the vertical direction, and the third and fifth embodiments are implemented. In the manufacturing apparatuses 11C and 11E used in the manufacturing method of the aspect, the upper and lower pair of conveyor belts 193 and 194 are provided as the mechanism for pressing from the vertical direction, and the conveyor belts 12 and 13 may be pressed together instead. mechanism.

The mechanism for pressing the conveyance belts 12 and 13 together is a roller that rotates while being in contact with the conveyance belts 12 and 13 on the outer peripheral sides of the conveyance belts 12 and 13. Since the rollers disposed on the outer peripheral side of each of the conveyor belts 12 and 13 are formed bilaterally symmetrically, in the following description, a roller will be described.

Specifically, in the manufacturing apparatus 11F in the manufacturing method of the eighth embodiment shown in FIG. 19, the outer peripheral side of the upper conveyance belt 12a is provided to be rotated by the rotation of the upper conveyance belt 12a. The rollers 112a and 112b are provided with rollers 122a and 122b that are rotated by the rotation of the lower conveyance belt 12b on the outer peripheral side of the lower conveyance belt 12b. The rollers 112a, 112b, 122a, and 122b have the rotation axis directions arranged in the z direction, respectively. The roller 112a on the side of the upper conveyance belt 12a is disposed in the y direction in the center of the rotation axis of the press-cut slitting rolls 183 of the manufacturing apparatuses 11A, 11B, and 11C or the center of the rotation axis of the rolls 171 of the manufacturing apparatuses 11D and 11E. At the upstream side, the roller 112b is disposed on the upstream side of the roller 112a in the y direction. Further, the roller 122a on the lower conveyance belt 12b side is disposed in the y direction in the center of the rotation axis of the press-cut slitting rolls 183 of the manufacturing apparatuses 11A, 11B, and 11C or the center of the rotation axis of the rolls 171 of the manufacturing apparatuses 11D and 11E. At substantially the same position, the roller 122b is disposed at a position between the rollers 112a and 112b on the side of the upper conveyance belt 12a in the y direction.

As shown in Fig. 19, in the manufacturing apparatus 11F, two rolls 112a and 112b are disposed in the upper conveyance belt 12a, but any one of them may be disposed, or more than two rolls may be disposed. The form. In the same manner, the two rollers 122a and 122b are disposed in the lower conveyance belt 12b. However, any one of them may be disposed, or a configuration may be adopted in which more than two rollers are disposed.

According to the manufacturing method of the eighth embodiment of the manufacturing apparatus 11F, in the cutting step, the portion of the linear elastic body that is extended can be held while being stretched while the belts 12 and 13 are pressed together. Cut. Specifically, the linear elastic body 7 wound around the outer peripheral side of the upper conveyance belt 12a can be held by the two rolls 112a and 112b, and held by the two rolls 122a and 122b to the lower conveyance belt 12b. The linear elastic body 7 on the outer peripheral side is supplied between the pair of press-cut slitting rolls 183 and the anvil roll 184 in the manufacturing apparatus 11A, 11B, and 11C in the manufacturing apparatus 11A, 11B, and 11C. 11D and 11E are supplied between the rolls 171 and 172, and are cut while being stretched.

In addition, as a mechanism for pressing the conveyance belts 12 and 13 together, a conveyor belt that rotates while being in contact with the conveyance belts 12 and 13 on the outer circumferential sides of the conveyance belts 12 and 13 is exemplified. Since the conveyor belts disposed on the outer peripheral side of each of the conveyor belts 12 and 13 are formed bilaterally symmetrically, in the following description, a conveyor belt will be described.

Specifically, the manufacturing apparatus 11G in the manufacturing method of the ninth embodiment shown in FIG. 20 is preferably provided on the outer peripheral side of the upper conveyance belt 12a by the rotation of the upper conveyance belt 12a. The conveyor belt 114 is provided with a conveyor belt 115 that rotates by the rotation of the lower conveyor belt 12b on the outer peripheral side of the lower conveyor belt 12b. The conveyor belt 114 is placed between the rollers 114a and 114b arranged in the z direction in the direction of the rotation axis. The roller 114a on the side of the upper conveyance belt 12a is disposed in the y direction in the center of the rotation axis of the press-cut slitting rolls 183 of the manufacturing apparatuses 11A, 11B, and 11C or the center of the rotation axis of the rolls 171 of the manufacturing apparatuses 11D and 11E. At the upstream side, the roller 114b is disposed on the upstream side of the roller 114a in the y direction. The roller 115a on the lower conveyance belt 12b side is disposed substantially in the y direction in the center of the rotation axis of the press-cut slitting rolls 183 of the manufacturing apparatuses 11A, 11B, and 11C or the center of the rotation axis of the rolls 171 of the manufacturing apparatuses 11D and 11E. At the position, the roller 115b is disposed at a position between the rollers 114a and 114b on the side of the upper conveyance belt 12a in the y direction. Therefore, the conveyor belt 115 disposed on the lower conveyance belt 12b side is disposed slightly downstream of the conveyor belt 114 disposed on the lower conveyance belt 12a side in the y direction. The bearing portions of the rollers 114a and 114b that erect the conveyor belt 114 are hydraulic oil, air pressure, spring, etc., based on the fact that the conveyor belt 114 securely holds the linear elastic body 7 wound around the outer peripheral side of the upper conveyor belt 12a. Force the respective bearing parts to be pressurized. The same applies to the bearing portions of the rollers 115a, 115b on which the conveyor belt 115 is erected.

According to the manufacturing method of the ninth embodiment of the manufacturing apparatus 11G, in the cutting step, the portion of the linear elastic body that is extended can be held while being stretched while the belts 12 and 13 are pressed together. Cut. Specifically, the linear elastic body 7 wound around the outer peripheral side of the upper conveyance belt 12a is held by the conveyor belt 114, and the linear elastic body 7 wound to the outer peripheral side of the lower conveyance belt 12b is held by the conveyor belt 115. The remaining portions of the linear elastic body 7 are supplied to the pair of press-cut slitting rolls 183 and the anvil rolls 184 in the manufacturing apparatuses 11A, 11B, and 11C, and are supplied to the rolls 171 in the manufacturing apparatuses 11D and 11E. Between 172, the surface is stretched while being stretched.

Further, in the manufacturing method of the first, second, third, fourth, fifth, eighth, and ninth embodiments, both end portions in the width direction are folded toward the outer surface side to be narrow. The strip-shaped sheet body is introduced between the pair of rolls 171 and 172 to fix the linear elastic body between the strip-shaped sheets, but the strip-shaped sheet body which is not folded at both ends in the width direction can be introduced into one. Between the rolls 171 and 172, the linear elastic body is fixed between the strip-shaped sheets.

In the strip-like sheet system of the sixth or seventh embodiment, a sheet body in which both side portions in the longitudinal direction (both ends in the width direction of the sheet body) are not folded may be used. In this case, both end edges in the width direction of the strip-shaped sheet body are the same as both end edges in the width direction of the stretchable sheet body. Moreover, in the case of folding, it may be only the end portion in the width direction of the sheet on one side, or may be only the end portion of the strip-shaped sheet. Further, the linear elastic body 7 corrects the inclination to a direction orthogonal to the y direction (x direction), but may be held at an angle of the conveyance belt 12 and fixed to a pair of belt-shaped sheets without correction. 50, 60.

Further, the elastic winding mechanism may be a mechanism including a disk having a lead portion of a linear elastic body and a arm projecting from the disk to a downstream side in the y direction, and the arm is surrounded by Around the conveyor belts 12, 13, the linear elastic body is wound around the conveyor belts 12, 13. Further, those described in Patent Document 1 or 2 can also be used.

Further, as the conveyor belt, a conveyor belt as disclosed in WO 2005/060910 may be used instead of a pair of conveyor belts. In this case, one conveyor belt can be used. Moreover, as the wire-conveying strip structure, the wire support member provided with the spiral groove described in FIGS. 4 to 6 of JP-A-2002-192641 can also be used.

Further, as the cutting mechanism in the second cutting step of the second and seventh embodiments, a press-cut vertical cutter or a plough cutter of another embodiment may be used, and a fixed knife or a rotary knife may be used. Further, as the cutting mechanism of the first cutting step, the same cutting mechanism as the second cutting step can be used.

The stretchable sheet produced by the production method of the present invention, for example, the stretch sheet system manufactured by the first to ninth embodiment, may be used in addition to the waist flap of the unfolded disposable diaper. The abdominal circumference of the disposable diaper of the unfolding type or the shorts type, the short-period type sanitary napkin, the disposable underwear, the hanging ear part of the disposable mask, the sheet for vacuuming, the bandage, and the like.

Further, the waist panel 3 may be a fixing mechanism including an engaging portion formed by fixing a male member of the surface fastener to a single surface of the elastic sheet, or containing an adhesive. The fixing mechanism of the formed adhesive portion. These fixing mechanisms can be used by being fixed to, for example, the outer surface of the abdominal side A side of the absorbent body 2 or the sheet 4 when the diaper is worn.

Further, the portions of the above-described one embodiment and the components of only one embodiment can be appropriately applied to other embodiments, and the elements of the respective embodiments can be appropriately replaced with each other.

In the above embodiment, the present invention further discloses the following production method or method for producing an absorbent article.

<1> A method for producing a stretchable sheet, which is continuously manufactured between a pair of strip-shaped sheets to fix a linear elastic body in a state of being elongated in a direction intersecting a conveying direction of the strip-shaped sheet. a stretchable sheet comprising: a supply step of continuously discharging the linear elastic body, introducing the discharged linear elastic body to an elastic body winding mechanism; and a transporting step of using the elastic body The winding mechanism continuously winds the linear elastic body to a pair of conveying belts which are spaced apart from each other in a direction orthogonal to the conveying direction of the sheet body, and conveys the linear elastic body by a pair of the conveying belts; a step of fixing the linear elastic body conveyed between the strip-shaped sheets; and a cutting step of cutting the two ends of the pair of strip-shaped sheets extending in the width direction Part of a linear elastomer.

<2> The method for producing a stretchable sheet according to the above <1>, wherein in the cutting step, the stretched portion of the linear elastic body is cut while being stretched, and the thread is removed. The extended part of the elastomer.

<3> The method for producing a stretchable sheet according to the above <2>, wherein in the integrating step, the linear elastic body is pasted in a state in which the linear elastic body is wound around a pair of the transport belts Between the strip-shaped sheets, in the cutting step, the cutting mechanism disposed on the inner side of the pair of the conveying belts is used to cut the line in a state where the linear elastic body is wound around the pair of the conveying belts. Elastomeric.

(4) The method for producing a stretchable sheet according to the above <2>, wherein, in the integrating step, the linear elastic body is fixed to the pair of the strip-shaped sheets in an elongated state by using a roll. Thereafter, in the dicing step, the portion of the linear elastic body that has been extended is cut while being stretched.

<5> The method for producing a stretchable sheet according to the above <2>, wherein, in the integrating step, the linear elastic body is fixed between the pair of the strip-like sheets in an extended state. At the same time, in the above-described cutting step, the stretched portion of the linear elastic body is cut while being stretched.

The method for producing a stretchable sheet according to any one of the above-mentioned items, wherein in the cutting step, the portion of the linear elastic body that extends is used from the upper direction and/or The mechanism that is pressed in the downward direction is cut while being stretched.

The method for producing a stretchable sheet according to any one of the above-mentioned, wherein, in the cutting step, the extending belt is pressed together with respect to the linear elastic body that is extended. The mechanism is cut while being stretched.

The method for producing a stretchable sheet according to any one of the above-mentioned items, wherein the both ends of the strip-shaped sheet are folded toward the outer surface side in the width direction. As a narrow strip-shaped sheet, after the above-described integration step and cutting step, the respective folded portions of the strip-shaped sheet are unfolded.

<9> The method for producing a stretchable sheet according to the above <1>, wherein the cutting step includes a first cutting step of cutting the linear elastic body after the integrating step a portion in which both end edges of the strip-shaped sheet body extend in the width direction are released, and the linear elastic body is released from the wound state of the linear transporting elongated structure, and further includes a second cutting step, and the second cutting step After the first cutting step, the whole or a part of the portion of the linear elastic body extending from both end edges in the width direction of the strip-shaped sheet body is removed by cutting.

<10> The method for producing a stretchable sheet according to the above aspect, wherein in the second cutting step, only a portion of the linear elastic body extending from both end edges in the width direction of the strip-shaped sheet body is cut.

<11> The method for producing a stretchable sheet according to the above <10>, wherein the length of the portion extending from both end edges in the width direction of the strip-shaped sheet is 5 mm or less in the second cutting step. The above linear elastic body is cut.

<12> The method for producing a stretchable sheet according to the above <9>, wherein in the second cutting step, the portion which is further inside than the both end edges in the width direction of the strip-shaped sheet is cut, and the linear elasticity is The constricted portion of the body is removed together with a portion of the strip-like sheet.

<13> The method for producing a stretchable sheet according to the above <12>, wherein a position at which the strip-shaped sheet is cut is a distance from each of both end edges of the strip-shaped sheet in the width direction to become a total of the strip-shaped sheet 0 to 20% of the width.

The method for producing a stretchable sheet according to any one of the above-mentioned <9>, wherein the pair of the strip-shaped sheets are folded toward the outer surface side in the width direction. In the narrow strip-shaped sheet body, after the integration step, the first cutting step, and the second cutting step, the folded portions of the strip-shaped sheets are unfolded, and a pair of the strip-shaped sheets are unfolded. The parts are joined to each other.

The method for producing a stretchable sheet according to any one of the above-mentioned, wherein the length of the linear elastic body contained in the stretchable sheet produced is changed in the cutting step. The portions extending from the opposite ends of the pair of strip-shaped sheets in the width direction are cut in a uniform manner.

<16> The method for producing a stretchable sheet according to the above <6>, wherein the unnecessary portion of the cut linear elastic body is used by a mechanism for pressing a portion of the linear elastic body extending Transfer to the attraction department.

<17> A method of producing a disposable diaper, comprising: a disposable diaper comprising: an absorbent body comprising a front sheet, a back sheet, and an absorbent disposed between the two sheets And a waist panel, comprising a stretchable sheet; and the method for producing the disposable diaper, comprising the method for producing a stretchable sheet according to any one of the above <1> to <16> The steps of the slice.

<18> A method for producing a disposable diaper according to the method for producing a stretchable sheet according to any one of the above <1> to <16>, wherein the stretchable sheet is used as a waist flap. A method of manufacturing a disposable diaper, wherein the disposable diaper comprises an absorbent body comprising a front sheet, a back sheet and an absorbent body disposed between the two sheets, and the method for manufacturing the disposable diaper comprises The following steps: manufacturing a continuous body of the absorbent body, the continuous system of the absorbent body comprising the continuous body of the front sheet, the continuous body of the back sheet, and the continuous arrangement of the two bodies in the transport direction a plurality of absorbers; each of the absorbers included in the continuum of the absorbent body is protruded toward the outer side in the direction intersecting the transport direction while transporting the continuous body of the absorbent body in the transport direction A pair of the above-mentioned waist flaps are disposed; and a continuous body of the absorbent body provided with the waist flaps is cut into the size of each diaper.

Industrial availability

According to the method for producing a stretchable sheet of the present invention, the unnecessary portions of the both ends of the linear elastic body can be cut to be as short as possible, thereby improving the aesthetics of the stretchable sheet produced.

According to the method for producing a stretchable sheet of the present invention, it is possible to provide a method for producing a stretchable sheet which is continuously manufactured between a pair of strip-shaped sheets to fix the linear elastic body along the strip shape a method of forming a stretchable sheet in a state in which the direction in which the sheet is conveyed is crossed, and the unstable portion of the linear elastic body extending from the edge of the strip-shaped sheet in the width direction can be efficiently removed. Thereby, a stretchable sheet having a good appearance can be efficiently produced. Further, the method for producing the stretchable sheet of the present invention can be carried out by a relatively simple apparatus.

1. . . Disposable diaper

1'. . . Disposable diaper

2. . . Absorbing ontology

3. . . Waist flap

3A. . . Flexible sheet

4. . . Sheet

5. . . Sheet

6. . . Sheet

7. . . Linear elastomer

8. . . Fastening strap

11. . . Manufacturing device

11A. . . Manufacturing device

11B. . . Manufacturing device

11C. . . Manufacturing device

11D. . . Manufacturing device

11E. . . Manufacturing device

11F. . . Manufacturing device

11G. . . Manufacturing device

12. . . Transport belt

12a. . . Upper conveyor belt

12b. . . Lower conveyor belt

13. . . Transport belt

13a. . . Upper conveyor belt

13b. . . Lower conveyor belt

14. . . Rotating arm

15. . . Elastomer supply mechanism

16. . . Transport agency

17. . . Integrated institution

18. . . Cutting mechanism

twenty one. . . Front sheet

twenty two. . . Back sheet

twenty three. . . Absorber

twenty four. . . Stereo protection forming sheet

25. . . Elastic member

26. . . Elastic member

50. . . Ribbon sheet

50A. . . The unfolded portion of the strip

60. . . Ribbon sheet

60A. . . The unfolded portion of the strip

70. . . Spool

112a. . . Roll

112b. . . Roll

114. . . Conveyor belt

114a. . . Roll

114b. . . Roll

115. . . Conveyor belt

115a. . . Roll

115b. . . Roll

121. . . pulley

122. . . pulley

122a. . . Roll

122b. . . Roll

122. . . pulley

124. . . pulley

125. . . pulley

131. . . pulley

132. . . pulley

134. . . pulley

135. . . pulley

141. . . Arm

142. . . Shaft

143. . . Surrounding

144. . . Linkage

145. . . Guide

146. . . Outlet

147. . . Drive mechanism

148. . . Servo motor

150. . . Sheet conveyor belt

150a. . . Roll

150b. . . Roll

151. . . Tensioner

152. . . Release roller

153. . . Tension tester

156. . . Feed roller

160. . . Sheet conveyor belt

160a. . . Roll

160b. . . Roll

171. . . Roll

172. . . Roll

176. . . Cutting knife

178. . . Cutter receiver

179. . . Extension

183. . . Press cutting longitudinal cutting roller

184. . . Anvil roll

185. . . Cutting knife

187. . . Cutter receiver

191. . . Press belt

191a. . . pulley

191b. . . pulley

191c. . . pulley

193. . . Conveyor belt

193a. . . Roll

193b. . . Roll

194. . . Conveyor belt

194a. . . Roll

194b. . . Roll

195. . . Attraction

218. . . Cutting mechanism

219. . . Second cutting mechanism

219A. . . Plowshare cutter

272. . . Shrinking part

280. . . slicer

293. . . Press cutting longitudinal cutting roller

294. . . Anvil roll

295. . . Cutting knife

296. . . Attraction

A. . . Ventral side

B. . . Dorsal side

C. . . Lower jaw

L1. . . length

X. . . direction

x. . . direction

Y. . . direction

y. . . direction

z. . . direction

Fig. 1 is a plan view showing a stretchable disposable diaper for a waist flap of a stretchable sheet obtained by the method for producing a stretchable sheet of the present invention.

Fig. 2 is a schematic view showing a manufacturing apparatus for manufacturing a waist flap of the unfolded disposable diaper shown in Fig. 1 according to the first embodiment of the present invention.

Fig. 3 is a schematic view showing a supply mechanism for introducing a linear elastic body to the rotary arm shown in Fig. 2; Fig. 3 is also a perspective view showing a configuration of the upstream side of the rotating arm (elastic winding mechanism) of the apparatus shown in Fig. 16.

Fig. 4 is a schematic view showing the manufacturing apparatus shown in Fig. 2 from the side.

Fig. 5 is a cross-sectional view taken along line X1-X1 of the conveyor belt, which is one of the manufacturing apparatuses shown in Fig. 2;

Fig. 6 is a cross-sectional view taken along the line X2-X2 of the conveyance belt, which is one of the manufacturing apparatuses shown in Fig. 2;

Fig. 7 is a schematic view showing a manufacturing apparatus for manufacturing a waist flap of the unfolded disposable diaper shown in Fig. 1 according to a second embodiment of the present invention.

Fig. 8 is a schematic view showing the manufacturing apparatus shown in Fig. 7 from the side.

Fig. 9 is a schematic view showing a manufacturing apparatus for manufacturing a waist flap of the unfolded disposable diaper shown in Fig. 1 by a side view of the third embodiment of the present invention.

Figure 10 is a cross-sectional view showing the cutting mechanism of the manufacturing apparatus shown in Figure 9.

Fig. 11 is a schematic view showing a manufacturing apparatus for manufacturing a waist flap of the unfolded disposable diaper shown in Fig. 1 by a side view of the fourth embodiment of the present invention.

Figure 12 is a cross-sectional view showing the cutting mechanism of the manufacturing apparatus shown in Figure 11.

Fig. 13 is a schematic view showing a manufacturing apparatus for manufacturing a waist flap of the unfolded disposable diaper shown in Fig. 1 by a side view of the fifth embodiment of the present invention.

Figure 14 is a cross-sectional view showing the cutting mechanism of the manufacturing apparatus shown in Figure 13.

Figure 15 is a plan view showing a waist flap and an unfolded disposable diaper obtained by an embodiment of the present invention.

Fig. 16 is a perspective view showing a manufacturing apparatus of a stretchable sheet which is preferably used in the production method of the sixth embodiment of the present invention.

Fig. 17 is a perspective view schematically showing an example of a cutting mechanism for performing a second cutting step on the stretchable sheet 3A manufactured by the manufacturing apparatus shown in Fig. 2 .

Fig. 18 is a perspective view showing a seventh embodiment of the present invention (corresponding to Fig. 17).

Fig. 19 is a perspective view showing a cutting mechanism for manufacturing a waist flap of the unfolded disposable diaper shown in Fig. 1 according to an eighth embodiment of the present invention.

Fig. 20 is a perspective view showing a cutting mechanism for manufacturing a waist flap of the unfolded disposable diaper shown in Fig. 1 by the ninth embodiment of the present invention.

7. . . Linear elastomer

11A. . . Manufacturing device

12. . . Transport belt

12a. . . Upper conveyor belt

12b. . . Lower conveyor belt

13. . . Transport belt

13a. . . Upper conveyor belt

13b. . . Lower conveyor belt

14. . . Rotating arm

16. . . Transport agency

17. . . Integrated institution

18. . . Cutting mechanism

50. . . Ribbon sheet

60. . . Ribbon sheet

121. . . pulley

122. . . pulley

124. . . pulley

125. . . pulley

131. . . pulley

132. . . pulley

134. . . pulley

135. . . pulley

141. . . Arm

142. . . Shaft

143. . . Surrounding

144. . . Linkage

145. . . Guide

146. . . Outlet

147. . . Drive mechanism

148. . . Servo motor

171. . . Roll

172. . . Roll

183. . . Press cutting longitudinal cutting roller

184. . . Anvil roll

185. . . Cutting knife

191. . . Press belt

191a. . . pulley

191b. . . pulley

191c. . . pulley

195. . . Attraction

x. . . direction

y. . . direction

z. . . direction

Claims (17)

A method for producing a stretchable sheet, which is continuously manufactured by stretching a pair of strip-shaped sheets to fix a linear elastic body in a state of being elongated in a direction intersecting a conveying direction of the strip-shaped sheet body And a supply step of continuously discharging the linear elastic body to introduce the discharged linear elastic body to the elastic body winding mechanism; and carrying the step of using the elastic body winding mechanism The linear elastic body is continuously wound to a pair of transport belts which are spaced apart from each other in a direction orthogonal to the transport direction of the sheet, and the linear elastic body is transported by a pair of the transport belts; The linear elastic body that has been transported is fixed between the strip-shaped sheets; and the cutting step is performed by cutting the linear elastic force extending from both end portions of the pair of strip-shaped sheets in the width direction. In the portion of the body, in the cutting step, a portion of the linear elastic body extending is used to be stretched while being held in an extended state, thereby removing the extended portion of the linear elastic body. The method for producing a stretchable sheet according to claim 1, wherein in the integrating step, the linear elastic body is adhered to the strip in a state in which the linear elastic body is wound around a pair of the transport belts. In the cutting step, the linear elastic body is cut in a state in which the linear elastic body is wound around the pair of the conveying belts by using a cutting mechanism disposed at an inner portion of the pair of the conveying belts. The method for producing a stretchable sheet according to claim 1 or 2, wherein in the integrating step, the linear elastic body is solidified by using a roll It is set between a pair of the above-mentioned strip-shaped sheets, and thereafter, in the said dicing process, the part which extended the said linear-shaped elastic body is hold|maintained, and it is cutting. The method for producing a stretchable sheet according to claim 1 or 2, wherein in the integrating step, the linear elastic body is fixed in an elongated state between a pair of the strip-shaped sheets, and at the same time, In the cutting step, the portion of the linear elastic body that extends is cut while being stretched. The method for producing a stretchable sheet according to claim 1, wherein in the cutting step, the portion of the linear elastic body that extends is held in an extended state by using a mechanism that presses from the upper direction and/or the lower direction. Cut on one side. The method for producing a stretchable sheet according to claim 1, wherein in the step of cutting, the linear elastic body that has been extended is cut while being held in an extended state by a mechanism that presses the transfer belt. The method for producing a stretchable sheet according to claim 1 or 2, wherein a pair of the strip-shaped sheets is formed by folding both end portions in the width direction toward the outer surface side to form a narrow strip-shaped sheet After performing the above-described integration step and cutting step, the respective folded portions of the strip-shaped sheets are unfolded. A method for producing a stretchable sheet, which is continuously manufactured by stretching a pair of strip-shaped sheets to fix a linear elastic body in a state of being elongated in a direction intersecting a conveying direction of the strip-shaped sheet body Sexual film, and includes: a supply step of continuously discharging the linear elastic body, introducing the discharged linear elastic body to the elastic body winding mechanism, and a transporting step of using the elastic body winding mechanism to form the linear elastic body Continuously winding to a pair of conveyor belts that are spaced apart from each other in a direction orthogonal to the conveying direction of the sheet, and conveying the linear elastic body by a pair of the conveyor belts; and an integration step of transporting the linear elastic body a linear elastic body is fixed between the strip-shaped sheets; and a cutting step of cutting a portion of the linear elastic body extending from both end portions of the pair of strip-shaped sheets in the width direction, wherein The cutting step includes a first cutting step of cutting the portion of the linear elastic body extending from both end edges in the width direction of the strip-shaped sheet body after the integration step, and releasing the line The elastic body is further provided with a second cutting step in the wound state of the linear transporting long structure, and the second cutting step is performed after the first cutting step, and the linear elastic body is removed by cutting. From the top The whole or part of the both edges in the width direction of the belt-like sheet extending out of. The method for producing a stretchable sheet according to claim 8, wherein in the second cutting step, only the portion of the linear elastic body extending from both end edges in the width direction of the strip-shaped sheet body is cut. The method for producing a stretchable sheet according to claim 9, wherein in the second cutting step, the linear elasticity is cut so that the length of the portion extending from both end edges in the width direction of the strip-shaped sheet is 5 mm or less body. The method for producing a stretchable sheet according to claim 8, wherein in the second cutting step, the cut is more inside than the both end edges in the width direction of the strip-shaped sheet And the part of the linear elastic body is removed together with one of the strip-shaped sheets. The manufacturing method of the stretchable sheet of claim 11, wherein the position of the strip-shaped sheet is at a distance from each of the two ends of the strip-shaped sheet in the width direction to be 0 to the total width of the strip-shaped sheet. 20% location. The method for producing a stretchable sheet according to any one of claims 8 to 12, wherein a pair of the strip-shaped sheets is formed by folding both end portions in the width direction toward the outer surface side to form a narrow strip. After the integration step, the first cutting step, and the second cutting step are performed on the sheet body, the folded portions of the strip-shaped sheets are unfolded, and the unfolded portions of the pair of strip-shaped sheets are joined to each other. The method for producing a stretchable sheet according to any one of claims 1 to 2, wherein the length of the linear elastic body contained in the stretchable sheet produced is uniform in the cutting step. In this manner, a portion extending from each of both end portions in the width direction of the pair of strip-shaped sheets is cut. The method for producing a stretchable sheet according to claim 5 or 6, wherein the unnecessary portion of the cut linear elastic body is conveyed to the suction portion by a mechanism for pressing a portion of the linear elastic body extending. A method for manufacturing a disposable diaper, which is a method for manufacturing a disposable diaper, comprising: an absorbent body comprising a front sheet, a back sheet, and an absorbent disposed between the two sheets And a waist panel comprising a stretchable sheet; and the method of manufacturing the disposable diaper comprising the method of manufacturing the stretchable sheet according to any one of claims 1 to 15 of step. A method for producing a disposable diaper, which comprises using a stretchable sheet obtained by the method for producing a stretchable sheet according to any one of claims 1 to 15 as a waist flap to manufacture a disposable diaper. And the disposable diaper comprises an absorbent body comprising a front sheet, a back sheet and an absorbent body disposed between the two sheets, and the method for manufacturing the disposable diaper comprises the steps of: manufacturing absorbent a continuous body of the body, the continuous system of the absorbent body comprising a plurality of absorbers disposed continuously between the continuous body of the front sheet, the continuous body of the back sheet, and the continuous body of the two sheets in the conveying direction; When the continuous body of the absorbent body is conveyed in the conveying direction, a pair of the waist portions are disposed for each of the absorbent bodies included in the continuous body of the absorbent body so as to protrude toward the outer sides in the direction intersecting the conveying direction. a sheet; and a continuum of the absorbent body provided with the waist flaps is cut into the size of each diaper.