JP2018099226A - Manufacturing method of composite stretchable member and manufacturing apparatus of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a composite stretchable member which achieves both of seal and cutting and stably performs them.SOLUTION: A manufacturing method of a composite stretchable member comprises a step of transporting a composite sheet 15 and introducing it into a first processing part 11 to perform first processing, and then introduced it into a second processing part 12 to perform second processing. The first processing part 11 includes an anvil roll 13 and a first processing roll, and the second processing part 12 includes an anvil roll 14 and a second processing roll. The composite sheet 15 is transported such that a first sheet material 1 faces the first processing roll at the first processing part 11, and a second sheet material 2 faces the second processing roll at the second processing part 12. A low stretchable area 6 is formed by bonding the first and second sheet materials 1, 2 of the composite sheet 15 and cutting an elastic member 4, or cutting the elastic member 4 and bonding the first and second sheet materials 1, 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for a composite elastic member.

  In an absorbent article such as a disposable diaper, a technique is adopted in which an exterior body made of a composite stretchable member is disposed outside the absorbent body and the fit of the diaper is increased by the exterior body. As an elastic composite member, a member including two sheet materials and an elastic member fixed in an expanded state between both sheet materials is known.

  For example, Patent Document 1 proposes a pants-type disposable diaper having an outer packaging material 2 provided with a composite stretchable portion 4 and a non-functionalized region 51 that loses stretchability along the width direction of the diaper. In the outer packaging material 2, the sheets 21 and 22 are joined to each other by intermittent joining portions in the stretching direction of the composite stretchable portion 4 and the direction orthogonal thereto. In the non-functionalized region 51, the waistline elastic member 23 is cut into pieces by cutting or the like, and as a result, the stretched state of the elastic member 23 is relaxed so as to be nonfunctional. The outer packaging material 2 having such a structure is obtained by processing the original fabric having the sheets 21 and 22 and the waistline elastic member 23 through the pair of rolls 62 and 63. In this processing, by passing the original fabric between the pair of rolls 62 and 63, sealing of the sheets 21 and 22 and non-functionalization by cutting the elastic member are simultaneously performed.

JP 2008-142341 A

  When performing the sealing of two sheets and the cutting of the elastic member at the same time using the technique described in Patent Document 1, the sealing and the cutting affect each other, and both processes can be performed stably. It can be difficult.

  Therefore, the subject of this invention exists in improvement of manufacture of a composite elastic | stretch member, and it is in detail performing the sealing and cutting | disconnection stably in manufacture of a composite elastic member.

  The present invention includes a first sheet material, a second sheet material, and a plurality of elastic members extending in one direction arranged in an extended state between the two sheet materials, and along the one direction. A method for producing a composite stretchable member having a stretchable high stretchable region and a low stretchable region that is less stretchable than the high stretchable region, wherein the first sheet material, the second sheet material, A composite sheet including a plurality of the elastic members extending in one direction and arranged in a stretched state between the two sheet materials is introduced into the first processing section while being conveyed along the one direction. And then performing a second process by introducing the second process part into a second process part located downstream of the first process part in the transport direction, wherein the first process part includes a first anvil roll and a first process part. And a second anvil roll and a second processing roll. An area closer to the outside in the width direction perpendicular to the conveying direction in the first processing section with respect to a processing area including a planned area for forming the low expansion / contraction area in the composite sheet, and the second The present invention provides a method for manufacturing a composite stretchable member that processes a region closer to the inner side than the region closer to the outer side in the processing portion.

  Further, the present invention includes a first sheet material, a second sheet material, and a plurality of elastic members extending in one direction arranged in an extended state between the two sheet materials, and in the one direction A method for producing a composite stretchable member having a high stretchable region stretchable along and a low stretchable region having lower stretchability than the high stretched region, wherein the first sheet material and the second sheet material And a composite sheet including a plurality of the elastic members extending in one direction arranged in an extended state between the two sheet materials, and introduced into the first processing section while being conveyed along the one direction. 1 is performed, and then introduced into a second processing unit located downstream of the first processing unit in the transport direction to perform a second processing, and the first processing unit is a first anvil roll And a first processing roll, and the second processing portion is a second anvil roll and a second processing roll. And processing a region closer to the inner side in the width direction perpendicular to the conveying direction in the first processing unit with respect to a processing region including a region to form the low stretchable region in the composite sheet, The present invention provides a method for manufacturing a composite stretchable member, wherein a region closer to the outer side than the region closer to the inner side is processed in the second processing portion.

  Furthermore, the present invention includes a first sheet material, a second sheet material, and a plurality of elastic members extending in one direction and arranged in an extended state between the two sheet materials, and along the one direction. A stretchable high stretch region and a composite stretchable member manufacturing apparatus having a low stretchable region that is less stretchable than the high stretchable region, wherein the first sheet material, the second sheet material, , A means for conveying a composite sheet including a plurality of elastic members extending in one direction disposed between the two sheet materials in a stretched state, and a first process on the composite sheet. A first processing unit to be performed; and a second processing unit that is positioned downstream of the first processing unit in the transport direction and performs a second processing on the composite sheet. The first processing unit is a first anvil. A roll and a first processing roll, and the second processing section includes a second anvil roll and a first processing roll. The first processing unit processes a region closer to the outside in the width direction perpendicular to the conveying direction with respect to a processing region including a processing region including a processing region including a processing region that includes the planned region for forming the low expansion / contraction region on the composite sheet. Thus, the second processing section provides an apparatus for manufacturing a composite stretchable member configured to process a region closer to the inside than the region closer to the outer side.

  Furthermore, the present invention includes a first sheet material, a second sheet material, and a plurality of elastic members extending in one direction and arranged in an extended state between the two sheet materials, and along the one direction. A stretchable high stretch region and a composite stretchable member manufacturing apparatus having a low stretchable region that is less stretchable than the high stretchable region, wherein the first sheet material, the second sheet material, , A means for conveying a composite sheet including a plurality of elastic members extending in one direction disposed between the two sheet materials in a stretched state, and a first process on the composite sheet. A first processing unit to be performed; and a second processing unit that is positioned downstream of the first processing unit in the transport direction and performs a second processing on the composite sheet. The first processing unit is a first anvil. A roll and a first processing roll, and the second processing section includes a second anvil roll and a first processing roll. The first processing section processes a region closer to the inside in the width direction perpendicular to the conveyance direction with respect to a processing region including a processing roll including a planned region that forms the low stretchable region in the composite sheet. Thus, the second processing section provides an apparatus for manufacturing a composite stretchable member configured to process a region closer to the outer side than the region closer to the inner side.

  ADVANTAGE OF THE INVENTION According to this invention, in manufacture of a composite expansion-contraction member, joining of a sheet | seat and cutting | disconnection of an elastic member can be performed stably.

FIG. 1 is a plan view of one embodiment of a composite elastic member manufactured according to the present invention. FIG. 2 is a schematic diagram showing an example of an apparatus suitably used for manufacturing the composite elastic member shown in FIG. FIG. 3 is a plan view showing a composite sheet for obtaining the composite elastic member shown in FIG. FIG. 4 is a plan view showing the composite sheet that has been subjected to the first processing by the first processing unit in the manufacturing apparatus shown in FIG. 2. FIG. 5 is a schematic diagram illustrating an enlarged view between the first processing unit and the second processing unit in the manufacturing apparatus illustrated in FIG. 2. 6 is a schematic diagram (corresponding to FIG. 2) showing another apparatus suitably used for manufacturing the composite elastic member shown in FIG.

  The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 shows a plan view of a composite elastic member manufactured according to the present invention. The composite elastic member 3 shown in FIG. 1 has a longitudinal direction X and a width direction Y orthogonal thereto. The composite stretchable member 3 has a first sheet material 1 and a second sheet material 2. A plurality of elastic members 4 are arranged between the sheet materials 1 and 2. The elastic member 4 is disposed so as to extend along the longitudinal direction X at positions on both sides in the width direction Y of the composite stretchable member 3. The elastic member 4 is not disposed at the central region in the width direction Y of the composite elastic member 3.

  The elastic member 4 has an elongated shape and is generally called a thread rubber or a strand. The thickness, material, elastic modulus and the like of each elastic member 4 may be the same or different. In general, the same elastic member 4 is used, but is not limited thereto. Each elastic member 4 is disposed and fixed between the sheet materials 1 and 2 so as to extend in one direction in an extended state. Specifically, each elastic member 4 extends along the longitudinal direction X. Each elastic member 4 is arranged substantially in parallel. Therefore, the interval between the adjacent elastic members 4 is substantially the same at any position of the elastic member 4. The interval between any two adjacent elastic members 4 may be the same or different.

  Each elastic member 4 is fixed to each of the two sheet materials 1 and 2 sandwiching the elastic members 4 at the positions of both ends thereof in an extended state, whereby the composite elastic member 3 has a first high elastic region 5a. Is formed. In the embodiment shown in FIG. 1, a pair of first high stretchable regions 5 a and 5 a are formed at positions on both sides in the width direction Y of the composite stretchable member 3 with a distance along the longitudinal direction X. . Each first high stretchable region 5 a can be stretched along the longitudinal direction X, which is the direction in which the elastic member 4 extends.

  In the composite stretchable member 3, a second high stretchable region 5 b is formed between a pair of first high stretchable regions 5 a arranged at a distance along the longitudinal direction X. Similarly to the first high stretchable region 5a, the second high stretchable region 5b is stretchable along the longitudinal direction X, which is the direction in which the elastic member 4 extends. Of the pair of side edges extending in the longitudinal direction X of the second high stretchable region 5b, the position of the side edge closer to the outside in the width direction Y coincides with the position of the side edge in the first high stretchable region 5a. . However, the position of the side edge closer to the inner side of the second high stretchable region 5b is different from the position of the side edge closer to the inner side of the first high stretchable region 5a. It is outward in the width direction Y rather than the position. As a result, the width of the second high stretchable region 5b is narrower than the width of the first high stretchable region 5a. The elastic member 4 disposed in the second high stretchable region 5b corresponds to a portion where the elastic member 4 disposed in the first high stretchable region 5a extends to the second high stretchable region 5b. In the following description, the term “high stretch region” means the first high stretch region 5a, the second high stretch region 5b, or both depending on the context.

  In the composite stretchable member 3, the first high stretchable region 5a and the second high stretchable region 5b are more relative to each other between the pair of first high stretchable regions 5a arranged at a distance along the longitudinal direction X. A low stretch region 6 having low stretchability is formed. When viewed along the longitudinal direction X of the composite elastic member 3, the formation position of the low expansion / contraction region 6 coincides with the formation position of the second high expansion / contraction region 5b. The low stretchable region 6 is a region having a relatively low stretchability than the first high stretchable region 5a and the second high stretchable region 5b, or a region having no stretchability. In FIG. 1, the state in which the elastic member 4 is disposed in the low stretchable region 6 is not shown, but this means that the elastic member 4 is not disposed in the low stretchable region 6 at all. This means that there is an elastic member 4 that is cut off at one place or two or more places and loses stretchability.

  As described above, in the composite stretchable member 3, the first high stretchable region 5a, the low stretchable region 6 and the first stretchable region 5 are located at the positions on both sides in the width direction Y along the longitudinal direction X, which is the direction in which the elastic member 4 extends. One high stretchable region 5a is arranged in this order. A second high stretchable region 5b and a low stretchable region 6 are arranged along the width direction Y. In short, the low expansion / contraction region 6 is arranged along the extending direction of the elastic member 4 in the positional relationship with the first high expansion / contraction region 5a, and the elastic member 4 in the positional relationship with the second high expansion / contraction region 5b. It is arrange | positioned along the direction orthogonal to the extending direction. In the composite stretchable member 3, the central region in the width direction Y is also a low stretchable region 7 because the elastic member 4 is not disposed. When the low stretch region 6 and the low stretch region 7 are compared, their stretchability may be the same or different.

  In the high stretchable regions 5a and 5b, the first sheet material 1 and the second sheet material 2 are stretched in the stretch direction of the composite stretchable member 3 (longitudinal direction X of the composite stretchable member 3) and in the direction perpendicular to it (the composite stretchable member). 3 are joined together by a plurality of joints 8 formed intermittently in the width direction Y). The elastic member 4 is arranged so as not to be positioned on the joint portion 8, and only the two sheet materials 1 and 2 are joined at the joint portion 8. That is, the elastic member 4 is arranged between the adjacent joints 8 in the row of the joints 8 arranged along the width direction Y.

  The low expansion / contraction region 6 can be obtained by joining both outer regions in the width direction Y in the first processed portion described later and then cutting the inner region in the width direction Y in the second processed portion described later. It can also be obtained by cutting the inner region in the width direction Y in the first processed portion described below before joining both outer regions in the width direction Y in the second processed portion described later.

  The two sheet materials 1 and 2 are fixed by various fixing means. As the fixing means, means used for this type of elastic member is appropriately employed. Examples of such means include adhesion by an adhesive, thermal fusion, or bonding by ultrasonic vibration.

  A portion indicated by reference numeral 9 in the low stretchable region 6 indicates a cutting position of the elastic member 4. In the cutting position 9, it is desirable that only the elastic member 4 is cut and the first sheet material 1 and the second sheet material 2 remain in an uncut state, but this is required for the composite stretchable member 3. As long as the characteristics are not impaired, it is allowed that a part of the first sheet material 1 and / or the second sheet material 2 is cut. The cutting position 9 is located on a virtual extension line in the extending direction of the elastic member 4 disposed in the first high stretchable area 5a located on both sides of the low stretchable area 6.

  As the two sheet materials 1 and 2 constituting the composite stretchable member 3, various non-woven fabrics and films can be used. The two sheet materials 1 and 2 may be the same or different. As the nonwoven fabric, for example, a spunbond nonwoven fabric, an air-through nonwoven fabric, a spunlace nonwoven fabric, a melt blown nonwoven fabric, or the like can be used. Two or more kinds of laminates of these nonwoven fabrics can also be used.

  FIG. 2 shows an example of an apparatus suitably used for manufacturing the composite elastic member 3 shown in FIG. Using the apparatus shown in the figure, the strip-shaped composite sheet 15 is processed to obtain the target composite stretchable member 3. For example, the composite sheet 15 has a structure as shown in FIG. The composite sheet 15 shown in FIG. 3 is a long object, and has a longitudinal direction X and a width direction Y orthogonal thereto. The longitudinal direction X and the width direction Y in the composite sheet 15 respectively coincide with the longitudinal direction X and the width direction Y of the composite stretchable member 3 shown in FIG. The composite sheet 15 is conveyed along the direction indicated by the symbol V in FIG. This conveyance direction V coincides with the longitudinal direction X of the composite sheet 15.

  As shown in FIG. 3, the composite sheet 15 has a first sheet material 1 and a second sheet material 2. A plurality of elastic members 4 are arranged between the sheet materials 1 and 2. The elastic member 4 is disposed so as to extend along the longitudinal direction X at positions on both sides in the width direction Y of the composite sheet 15. The elastic member 4 is not disposed at the central region in the width direction Y of the composite sheet 15. The elastic member 4 exists continuously over the entire length of the composite sheet 15 in the longitudinal direction. In other words, the elastic member 4 has no cut portion. In addition, the elastic member 4 is partially fixed to the first sheet material 1 and / or the second sheet material 2 with an adhesive or the like in an extended state. Further, the joint portion 8 formed in the composite stretchable member 3 does not exist in the composite sheet 15.

  The manufacturing apparatus 10 illustrated in FIG. 2 includes a first processing unit 11 and a second processing unit 12. The 1st process part 11 and the 2nd process part 12 are arrange | positioned in this order toward the downstream from the upstream of the conveyance direction in a conveyance line. Therefore, the second processing unit 12 is located downstream of the first processing unit 11. In the first processing unit 11, the first processing is performed on the composite sheet 15. In the 2nd process part 12, a 2nd process is performed with respect to the composite sheet 15 in which the 1st process was performed. The first processing and the second processing are performed continuously, and there is no separate processing step between the two processing.

  The first processing unit 11 includes a pair of rolls 13 and 20. The pair of rolls 13 and 20 includes a first anvil roll 13 and a seal roll 20. On the other hand, the second processing unit 12 includes a pair of rolls 14 and 30. The pair of rolls 14 and 30 includes a second anvil roll 14 and a cut roll 30.

  The 1st anvil roll 13 and the seal roll 20 which comprise the 1st process part 11 are opposingly arranged so that those axial centers may become parallel. Both rolls 13 and 20 are configured to rotate in the same direction as the conveyance direction V of the composite sheet 15. Both rolls 13 and 20 can be heated. The composite sheet 15 passes while being sandwiched between the circumferential surfaces of the two rolls 13 and 20 disposed opposite to each other, and is subjected to a first processing when passing.

  The seal roll 20 constituting the first processed portion 11 has a plurality of protrusions 21 on its peripheral surface. The protrusions 21 are provided on the peripheral surface of the seal roll 20 in such an arrangement that the joint portions 8 are formed in a predetermined pattern on the target composite elastic member 3. On the other hand, the peripheral surface 13a of the first anvil roll 13 is smooth. When the composite sheet 15 passes between the peripheral surfaces of both the rolls 13 and 20, the composite sheet 15 is sandwiched between the protrusion 21 of the seal roll 20 and the peripheral surface 13 a of the first anvil roll 13, and the first sheet material 1. And the second sheet material 2 are joined. From the viewpoint of ensuring this joining, it is preferable that the first anvil roll 13 and the seal roll 20 are both heated. In particular, the heating temperature of the first anvil roll 13 is lower than the heating temperature of the seal roll 20 to suppress thermal damage to the first sheet material 1 and the second sheet material 2. However, it is preferable from the viewpoint that both the sheet materials 1 and 2 can be reliably joined.

  Although the heating temperature of the 1st anvil roll 13 and the seal roll 20 can be suitably set according to the material, thickness, basic weight, etc. of the 1st and 2nd sheet materials 1 and 2, generally 80 degreeC or more each independently. It is preferable that it is 100 degreeC or more. Moreover, generally it is preferable that it is 200 degrees C or less, and it is still more preferable that it is 130 degrees C or less. Specifically, it is preferably 80 ° C. or higher and 200 ° C. or lower, and more preferably 100 ° C. or higher and 130 ° C. or lower. The difference between the heating temperature of the first anvil roll 13 and the heating temperature of the seal roll 20 is preferably 10 ° C. or higher, and preferably 20 ° C. or higher, provided that the heating temperature of the seal roll 20 is higher. Is more preferable. Moreover, it is preferable that it is 60 degrees C or less, and it is still more preferable that it is 40 degrees C or less. Specifically, the temperature difference is preferably 10 ° C. or more and 60 ° C. or less, and more preferably 20 ° C. or more and 40 ° C. or less.

  In the first processing unit 11, the diameter of the shaft of the first anvil roll 13 is smaller than the diameter of the shaft of the seal roll 20. In other words, the shaft diameter of the seal roll 20 is relatively larger than the shaft diameter of the first anvil roll 13. By doing so, it is possible to effectively suppress the rotating shaft of the seal roll 20 from being bent during operation of the manufacturing apparatus 10, and to form the joint 8 stably. From the viewpoint of making this advantage more remarkable, the ratio of the shaft diameter of the seal roll 20 to the shaft diameter of the anvil roll 13 is preferably 1.1 or more, and more preferably 1.2 or more. Preferably, it is more preferably 1.25 or more.

  As described above, the protrusion 21 is provided on the peripheral surface of the seal roll 20, and the diameter of the shaft of the seal roll 20 is drawn by the tip of the protrusion 21 when the seal roll 20 rotates. The diameter of the orbital circle.

  The above is a description of the details of the first processing unit 11. With regard to the second processing unit 12, the second anvil roll 14 and the cut roll 30 constituting the second processing unit 12 have their axes. Oppositely arranged so that the hearts are parallel. Both rolls 14 and 30 are configured to rotate in the same direction as the conveyance direction V of the composite sheet 15. Both the rolls 14 and 30 can be heated. The composite sheet 15 that has been subjected to the first processing passes while being sandwiched between the peripheral surfaces of the two rolls 14 and 30 that are arranged to face each other, and is subjected to the second processing when passing.

  The cut roll 30 which comprises the 2nd process part 12 has the some cutting blade 31 on the surrounding surface. The cutting blade 31 is provided on the peripheral surface of the cut roll 30 so that only the elastic member 4 is preferably cut at the cutting position represented by reference numeral 9 in FIG. On the other hand, the peripheral surface 14a of the second anvil roll 14 is smooth. Then, when the composite sheet 15 subjected to the first processing in the first processing unit 11 passes between the peripheral surfaces of both the rolls 14 and 30, the cutting blade 31 of the cut roll 30 and the second anvil roll 14. The first sheet material 1 and the second sheet material 2 are not cut by being sandwiched by the peripheral surface 14a, and only the elastic member 4 is cut. From the viewpoint of ensuring this cutting, it is preferable that the second anvil roll 14 and the cut roll 30 are both heated. In particular, the heating temperature of the second anvil roll 14 is lower than the heating temperature of the cut roll 30 while further avoiding the cutting of the first sheet material 1 and the second sheet material 2, This is preferable because the elastic member 4 can be cut reliably.

  The heating temperature of the second anvil roll 14 and the cut roll 30 can be appropriately set according to the material and thickness of the elastic member, the material of the first and second sheet materials 1 and 2, the thickness and the basis weight, etc. In each case, it is preferably 60 ° C. or higher, more preferably 90 ° C. or higher. Moreover, generally it is preferable that it is 200 degrees C or less, and it is still more preferable that it is 130 degrees C or less. Specifically, it is preferably 60 ° C. or higher and 200 ° C. or lower, and more preferably 90 ° C. or higher and 130 ° C. or lower. The difference between the heating temperature of the second anvil roll 14 and the heating temperature of the cut roll 30 is preferably 10 ° C. or higher, and preferably 20 ° C. or higher, provided that the heating temperature of the cut roll 30 is higher. Is more preferable. Moreover, it is preferable that it is 60 degrees C or less, and it is still more preferable that it is 40 degrees C or less. Specifically, the temperature difference is preferably 10 ° C. or more and 60 ° C. or less, and more preferably 20 ° C. or more and 40 ° C. or less.

  In the second processing unit 12, the diameter of the shaft of the second anvil roll 14 is smaller than the diameter of the shaft of the cut roll 30. In other words, the diameter of the shaft of the cut roll 30 is relatively larger than the diameter of the shaft of the second anvil roll 14. By carrying out like this, during operation of manufacturing device 10, it is controlled effectively that the axis of rotation of cut roll 30 bends, and elastic member 4 can be cut stably. From the viewpoint of making this advantage even more remarkable, the ratio of the shaft diameter of the cut roll 30 to the shaft diameter of the second anvil roll 14 is preferably 1.1 or more, and preferably 1.2 or more. Is more preferable, and it is still more preferable that it is 1.25 or more.

  The cutting blade 31 is provided on the peripheral surface of the cut roll 30 as described above. The diameter of the shaft of the cut roll 30 is the tip of the cutting blade 31 when the cut roll 30 rotates. The diameter of the orbit circle drawn by.

  The manufacturing method of the composite elastic member 3 using the manufacturing apparatus 10 having the above configuration will be described. First, the composite sheet 15 is supplied to the first processing unit 11 of the manufacturing apparatus 10. The structure of the composite sheet 15 is as shown in FIG. 3 as described above. The composite sheet 15 having the structure shown in the figure may be manufactured in-line in the manufacturing line of the composite elastic member 3 including the manufacturing apparatus 10. An example of such a production line is the apparatus shown in FIGS. 11 and 12 of Patent Document 1 described above. Instead of manufacturing the composite sheet 15 in-line, the composite sheet 15 may be manufactured offline in advance by another manufacturing apparatus (not shown) and supplied to the manufacturing apparatus 10.

  The composite sheet 15 is supplied to the first processing unit 11 of the manufacturing apparatus 10 with the elastic member 4 included in the composite sheet 15 in an expanded state. In the 1st process part 11, as the 1st process, it joins by joining the 1st and 2nd sheet materials 1 and 2 in the composite sheet 15 with the seal roll 20, and the junction part 8 is formed. The As shown in FIG. 3, the formation position of the joint portion 8 is a first processed region 41 that is a region in which the first high stretchable region 5 a is to be formed. Moreover, the formation position of the junction part 8 is the planned area 42b in the second processed area 42 composed of the planned area 42b for forming the second high stretchable area 5b and the planned area 42a for forming the low stretchable area 6. It is. In the planned areas 42a and 42b, the planned area 42a is positioned closer to the inner side in the width direction Y, and the planned area 42b is positioned closer to the outer side in the width direction Y.

  As described above, the composite sheet 15 is closer to the outer side in the width direction Y perpendicular to the transport direction in the first processing unit 11 than the second processed region 42 including the planned region 42a where the low stretchable region 6 is formed. Region, i.e., the planned region 42b. By processing the planned area 42b, the second high stretchable area 5b is formed in the planned area 42b. At the same time, the first processed region 41 is also joined in the first processed portion 11 to form the first highly stretchable region 5a. As shown in FIG. 4, the composite sheet 15 (hereinafter, this composite sheet 15 is also referred to as “post-composite composite sheet 16”) that has been joined by the first processing unit 11 is the first and second components. The sheet materials 1 and 2 are joined by a plurality of joining portions 8, and a plurality of elastic members 4 are arranged in an extended state between the sheet materials 1 and 2 so as to extend in one direction. . The joint portion 8 is not positioned on the elastic member 4, and as a result, the elastic member 4 is not joined to the first and second sheet materials 1 and 2 by the joint portion 8. The joint portion 8 is formed only in a region corresponding to the high stretchable regions 5a and 5b (see FIG. 1).

  The composite sheet 16 after processing thus obtained is continuously supplied to the second processing unit 12. The processed composite sheet 16 is supplied to the second processing section 12 with the elastic member 4 included in the processed composite sheet 16 in an expanded state. In the 2nd process part 12, it cuts by cut | disconnecting the elastic member 4 in the composite sheet 16 after a process with the cut roll 30 as a 2nd process. The cutting position is a position in the planned area 42a that is an area closer to the inside in the width direction Y than the planned area 42b that is already bonded in the first processed portion 11 in the second processed area 42. It is. This position corresponds to the position indicated by reference numeral 9 shown in FIG. The arrangement position of the cutting blade 31 provided on the cut roll 30 is closer to the inner side in the rotation axis direction than the arrangement position of the projection 21 of the seal roll 20 for forming the joint portion 8 in the planned area 42b. ing. As a result, in the second processing section 12, as shown in FIG. 4, the elastic member 4 located in the planned region 42a, which is a region closer to the inside in the width direction Y than the planned region 42b, is subjected to cutting processing. By cutting the elastic member 4 located in the planned area 42a, the low expansion / contraction area 6 (see FIG. 1) is formed in the planned area 42a.

  In the 2nd process part 12, the one elastic member 4 is cut | disconnected in two or more multiple places. However, it is not necessary that the single elastic member 4 is cut at a plurality of points, and only one point may be cut. When one elastic member 4 is cut at only one location, the cutting position can be the central portion of the low stretchable region 6 (see FIG. 1) (the central portion in the longitudinal direction X in FIG. 1).

  When the second processing is performed on the processed composite sheet 16, only the elastic member 4 in the processed composite sheet 16 is cut as much as possible, and the first and second sheet materials 1 and 2 are not cut as much as possible. It is desirable to do so.

  In this way, the composite stretchable member 3 having the form shown in FIG. 1 having the high stretchable regions 5a and 5b and the low stretchable region 6 is obtained.

  As is apparent from the above description, in the present manufacturing method, the outer side in the width direction perpendicular to the transport direction in the first processing unit 11 with respect to the second processed region 42 including the planned region 42a that forms the low stretchable region 6. The near planned area 42b is joined and the second processed portion 12 cuts the planned area 42a closer to the inner side than the outer side area. The composite sheet 15 is conveyed in the first processing unit 11 such that the first sheet material 1 faces the seal roll 20 and the second processing unit 12 faces the second sheet material 2 facing the cut roll 30. Is done. As a result, it is possible to effectively prevent the rotating shafts of the seal roll 20 and the cut roll 30 from being bent, and even when the bending occurs, the first processing and the second processing can be performed stably.

  More specifically, according to the manufacturing method and the manufacturing apparatus, the processing of sealing and cutting performed on the composite sheet 15 is performed on the planned region 42b that is both outer regions in the width direction Y in the second processed region 42. Since the first processing unit 11 and the second processing unit 12 that processes the planned region 42a that is the inner region in the width direction Y in the second processing region 42 are separately performed, sealing and cutting are performed by a single processing unit. Unlike the technique described in Patent Document 1 to be performed, the instability of sealing and / or cutting due to the bending and vibration of the roll that occurs due to the mutual influence of sealing and cutting is effectively suppressed. Therefore, for example, even in the case where the sealing conditions under low temperature and high pressure, which conventionally could not be processed successfully due to the mutual influence of bending and vibration, according to this manufacturing method and manufacturing apparatus, Both sealing and cutting can be performed successfully.

  In the above manufacturing method and manufacturing apparatus, as shown in FIG. 5, the post-processing composite sheet 16 is between the first anvil roll 13 in the first processing section 11 and the second anvil roll 14 in the second processing section 12. When the distance traveled in the space S is D, the distance D is preferably shorter than the circumferential length of the seal roll 20 in the first processed portion 11. In this way, when the elastic member 4 that expands and contracts along the width direction (Y direction in FIG. 1) is disposed on the composite elastic member 3, for example, when the composite elastic member 3 travels in the space S Moreover, it can suppress effectively that the composite elastic | stretch member 3 shrinks along the width direction. From this viewpoint, the distance D is more preferably shorter than 1 / n or less of the circumferential length of the seal roll 20 (n represents a natural number exceeding 1).

  As shown in FIG. 5, the distance D is a position 16 a where the processed composite sheet 16 is separated from the peripheral surface 13 a of the first anvil roll 13, and the processed composite sheet 16 is in contact with the peripheral surface 14 a of the second anvil roll 14 for the first time. It is the length when connecting the position 16b to be connected with a straight line. A line segment between the positions 16 a and 16 b is a tangent at the position 16 a on the peripheral surface 13 a of the first anvil roll 13 and also a tangent at the position 16 b on the peripheral surface 14 a of the second anvil roll 14. The circumferential length of the seal roll 20 is the circumferential length when the diameter of the shaft of the seal roll 20 is defined as the diameter of the orbit circle drawn by the tip of the protrusion 21 when the seal roll 20 rotates. That is.

  The above description relates to an embodiment in which the seal roll 20 is disposed in the first processing section 11 and the cut roll 30 is disposed in the second processing section 12 in the manufacturing method and manufacturing apparatus of the present invention. Instead, as shown in FIG. 6, an embodiment in which the cut roll 30 is disposed in the first processing unit 11 and the seal roll 20 is disposed in the second processing unit 12 may be employed.

  In the embodiment shown in FIG. 6, the first processing unit 11 includes a first anvil roll 13 and a cut roll 30, and the second processing unit 12 includes a second anvil roll 14 and a seal roll 20. The arrangement position of the cutting blade 31 provided on the cut roll 30 is closer to the inner side in the rotation axis direction than the arrangement position of the projection 21 of the seal roll 20 for forming the joint portion 8 in the planned area 42b. ing. Thereby, the second processing region 42 including the planned region 42a that forms the low expansion / contraction region 6 is processed in the first processing unit 11 in the planned region 42a closer to the inside in the width direction Y orthogonal to the transport direction, In the second processing portion, the planned region 42b closer to the outer side than the inner side region is processed. Specifically, the composite sheet 15 supplied to the manufacturing apparatus 10 is lower than the planned area 42 a of the second processed area 42 by the elastic member 4 being cut by the cut roll 30 in the first processing section 11. The stretchable region 6 (see FIG. 1) is formed, and the first and second sheet materials 1 and 2 are formed by the seal roll 20 in the second processing portion 12 with respect to the planned region 42b of the second processed region 42. Are to be joined. Thus, in this embodiment, the elastic member 4 is cut as the first processing, and the first and second sheet materials 1 and 2 are joined as the second processing. When these processes are performed, the composite sheet 15 is such that the first sheet material 1 faces the cut roll 30 in the first processing part 11 and the second sheet material 2 is sealed in the second processing part 12. It is conveyed so as to face the roll 20. As a result, according to this manufacturing method, it is possible to effectively prevent the rotating shafts of the cut roll 30 and the seal roll 20 from being bent, and even when the bending occurs, the first processing and the second processing can be performed stably. It can be performed.

  In the embodiment shown in FIG. 6, in the first processing unit 11, the shaft diameter of the first anvil roll 13 is preferably smaller than the shaft diameter of the cut roll 30. Thereby, it is possible to effectively suppress the occurrence of bending on the rotation shaft of the cut roll 30. For the same reason, in the second processing section 12, it is preferable that the diameter of the shaft of the second anvil roll 14 is smaller than the diameter of the shaft of the seal roll 20.

  In the embodiment shown in FIG. 6, both rolls 13 and 30 in the first processing unit 11 are heated, and the heating temperature of the first anvil roll 13 is lower than the heating temperature of the cut roll 30. Preferably it is. Accordingly, the elastic member 4 can be reliably cut while avoiding the cutting of the first sheet material 1 and the second sheet material 2. On the other hand, in the 2nd process part 12, both the rolls 14 and 20 with which this 2nd process part 12 was equipped are heated, and the heating temperature of the 2nd anvil roll 14 is more than the heating temperature of the seal roll 20. Is also preferably low. Thereby, both the sheet materials 1 and 2 can be reliably joined, suppressing the thermal damage given to the 1st sheet material 1 and the 2nd sheet material 2.

  In addition, regarding the embodiment shown in FIG. 6, the description regarding the embodiment shown in FIGS. For example, regarding the embodiment shown in FIG. 6, the distance D that the composite sheet 15 travels in the space S between the first anvil roll 13 in the first processing unit 11 and the second anvil roll 14 in the second processing unit 12 is set. It is preferable to make it shorter than the circumferential length of the cut roll 30 in the first processing section 11.

  According to the manufacturing method and the manufacturing apparatus of the present invention described above, the composite elastic member 3 in which the first and second sheet materials 1 and 2 are joined and the elastic member 4 is cut can be obtained successfully. be able to. The composite elastic member 3 thus obtained is suitably used as an exterior body disposed on the surface side of the absorbent main body in, for example, a pants-type disposable diaper. In this case, the Y direction of the composite elastic member 3 shown in FIG. 1 is made to coincide with the longitudinal direction of the absorbent main body, and the front region and the rear region in the longitudinal direction of the absorbent main body are the low elastic region 6 in the composite elastic member 3. What is necessary is just to arrange | position and join the composite elastic | stretch member 3 and an absorptive main body so that it may be located on the top.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment, A various change is possible in the limit which does not impair the effect of this invention. For example, in the embodiment shown in FIG. 2, the first and second sheet materials 1 and 2 are joined by the seal roll 20 in the first processing unit 11, and the elastic member 4 by the cut roll 30 in the second processing unit 12. However, instead of this, the first processing unit 11 includes the cut roll 30 as the first processing roll, and the second processing unit 12 includes the seal roll 20 as the second processing roll. In the 1 processing part 11, the elastic member 4 is cut | disconnected by the cut roll 30, and the area | region near the outer side of the width direction Y orthogonal to a conveyance direction is cut, the low expansion-contraction area | region 6 is formed, and the 2nd processing part 12 In this case, the first and second sheet materials 1 and 2 may be joined by the seal roll 20 to join the region closer to the inner side than the outer side region. In this case, the positional relationship between the second high stretchable region 5b and the low stretchable region 6 is opposite to that in the embodiment shown in FIG.

  In the embodiment shown in FIG. 6, the elastic member 4 is cut by the cut roll 30 in the first processing unit 11, and the first and second sheet materials 1 and 2 are cut by the seal roll 20 in the second processing unit 12. However, instead of this, the first processing unit 11 includes the seal roll 20 as the first processing roll, and the second processing unit 12 includes the cut roll 30 as the second processing roll. In the first processing unit 11, the first and second sheet materials 1 and 2 are joined by the seal roll 20 to join the region closer to the inside in the width direction Y perpendicular to the transport direction, and the second processing unit 12, the elastic member 4 may be cut by the cut roll 30 to cut the region closer to the outer side than the inner side region to form the low expansion / contraction region 6. In this case, the positional relationship between the second high stretchable region 5b and the low stretchable region 6 is opposite to that in the embodiment shown in FIG.

  Further, in the embodiment shown in FIGS. 2 and 6, the first processing unit 11 includes a seal roll as the first processing roll, and the second processing unit 12 includes another seal roll as the second processing roll. In the processing part 11, the first and second sheet materials 1 and 2 are joined by a seal roll, and in the second processing part 12, the first and second sheet materials 1 and 2 are joined by another seal roll. May be. The composite elastic member obtained in this case may be different from that shown in FIG.

  Further, in the embodiment shown in FIGS. 2 and 6, the first processing unit 11 includes a cut roll as the first processing roll, and the second processing unit 12 includes another cut roll as the second processing roll, In the process part 11, the elastic member 4 may be cut | disconnected with a cut roll, and in the 2nd process part 12, the elastic member 4 may be cut | disconnected with another cut roll. The composite elastic member obtained in this case may be different from that shown in FIG.

In relation to the above-described embodiment, the present invention further discloses the following method for producing a composite elastic member.
<1> A first sheet material, a second sheet material, and a plurality of elastic members extending in one direction arranged in an extended state between the two sheet materials, and stretchable along the one direction. A method for producing a composite stretchable member having a possible high stretchable region and a low stretchable region that is less stretchable than the high stretchable region, wherein the first sheet material, the second sheet material, and these A composite sheet including a plurality of elastic members extending in one direction and arranged in a stretched state between both sheet materials is introduced into the first processing section while being conveyed along the one direction, and the first processing is performed. And then performing a second machining by introducing it into a second machining section located downstream of the first machining section in the transport direction, wherein the first machining section has a first anvil roll and a first And a second anvil roll and a second work roll. A second region of the composite sheet, wherein a region closer to the outside in the width direction perpendicular to the conveying direction is processed in the first processing unit with respect to a processing region including a region where the low stretch region is formed in the composite sheet. The manufacturing method of the composite elastic member which processes the area | region near inner side rather than the area | region near outer side in a part.

<2> The first processing unit includes a seal roll as the first processing roll, the second processing unit includes a cut roll as the second processing roll, and the composite sheet includes the first processing unit, By joining the first sheet material and the second sheet material by the seal roll, the outer region is joined, and the elastic member is cut by the cut roll at the second working portion. The manufacturing method of the composite elastic member according to <1>, wherein the region closer to the inner side is cut to form the low elastic region.
<3> The first processing unit includes a cut roll as the first processing roll, and the second processing unit includes a seal roll as the second processing roll, and the composite sheet includes the first processing unit, By cutting the elastic member with the cut roll, the region near the outside is cut to form the low expansion / contraction region, and in the second processing portion, the first sheet material and the The manufacturing method of the composite elastic member according to <1>, wherein the inner region is bonded by bonding a second sheet material.
<4> The first processing unit includes a seal roll as the first processing roll, the second processing unit includes another seal roll as the second processing roll, and the composite sheet includes the first processing unit. The first sheet material and the second sheet material are joined by the seal roll to join the outer region, and in the second working portion, the first roll is used to join the first sheet material and the second sheet material. The method for producing a composite stretchable member according to <1>, wherein the inner region is joined by joining a sheet material and the second sheet material.
<5> The first processing unit includes a cut roll as the first processing roll, the second processing unit includes another cut roll as the second processing roll, and the composite sheet includes the first processing unit. And cutting the elastic member with the cut roll to cut the outer region, and cutting the elastic member with the cut roll at the second processing portion to cut the inner region. The manufacturing method of the composite elastic member as described in said <1> which carries out a cutting process.
<6> A first sheet material, a second sheet material, and a plurality of elastic members extending in one direction arranged in an extended state between the two sheet materials, and stretchable along the one direction. A method for producing a composite stretchable member having a possible high stretchable region and a low stretchable region that is less stretchable than the high stretchable region, wherein the first sheet material, the second sheet material, and these A composite sheet including a plurality of elastic members extending in one direction and arranged in a stretched state between both sheet materials is introduced into the first processing section while being conveyed along the one direction, and the first processing is performed. And then performing a second machining by introducing it into a second machining section located downstream of the first machining section in the transport direction, wherein the first machining section has a first anvil roll and a first And a second anvil roll and a second work roll. A second region of the composite sheet, wherein a region closer to the inner side in the width direction perpendicular to the conveyance direction is processed in the first processing unit with respect to a processing region including a region to be formed on the composite sheet. A method for manufacturing a composite stretchable member, wherein a region closer to the outer side than the region closer to the inner side is processed in the portion.

<7> The first processing unit includes a cut roll as the first processing roll, and the second processing unit includes a seal roll as the second processing roll, and the composite sheet includes the first processing unit, By cutting the elastic member with the cut roll, the region closer to the inside is cut to form the low expansion / contraction region, and in the second processing portion, the first sheet material and the The method for producing a composite stretchable member according to <6>, wherein the outer region is joined by joining the second sheet material.
<8> The first processing unit includes a seal roll as the first processing roll, the second processing unit includes a cut roll as the second processing roll, and the composite sheet includes the first processing unit, The first sheet material and the second sheet material are joined by the sealing roll to join the region closer to the inside, and the elastic member is cut by the cut roll at the second working portion. The manufacturing method of a composite stretchable member according to <6>, wherein the region near the outside is cut to form the low stretchable region.
<9> The first processing unit includes a seal roll as the first processing roll, the second processing unit includes another seal roll as the second processing roll, and the composite sheet includes the first processing unit. The first sheet material and the second sheet material are joined together by the seal roll to join the region closer to the inside, and the first work piece is joined by the seal roll in the second working portion. The method for producing a composite stretchable member according to <6>, wherein the outer region is joined by joining the sheet material and the second sheet material.
<10> The first processing unit includes a cut roll as the first processing roll, the second processing unit includes another cut roll as the second processing roll, and the composite sheet includes the first processing unit. And cutting the elastic member with the cut roll to cut the region closer to the inside, and in the second processing portion, cutting the elastic member with the cut roll to make the region closer to the outer side. The manufacturing method of the composite elastic member as described in said <6> to cut-process.
<11> The distance that the composite sheet travels in the space between the first anvil roll in the first processing unit and the second anvil roll in the second processing unit is the distance in the first processing unit. The method for producing a composite elastic member according to any one of <1> to <10>, wherein the length is shorter than a circumferential length of the first processing roll.

<12> In any one of the above items <1> to <11>, in the first processing section, a diameter of the shaft of the first anvil roll is smaller than a diameter of the first processing roll shaft. Manufacturing method of the composite elastic member.
<13> In any one of the above items <1> to <12>, in the second processing portion, a diameter of the shaft of the second anvil roll is smaller than a diameter of the second processing roll shaft. Manufacturing method of the composite elastic member.
<14> Both the rolls in the first processing section are heated, and the heating temperature of the first anvil roll is lower than the heating temperature of the first processing roll, <1> to < The manufacturing method of the composite elastic member of any one of 13>.
<15> Both the rolls in the second processing section are heated, and the heating temperature of the second anvil roll is lower than the heating temperature of the second processing roll, <1> to <14> The manufacturing method of the composite elastic member of any one of 14>.
<16> A first sheet material, a second sheet material, and a plurality of elastic members extending in one direction and arranged in an expanded state between the two sheet materials, and extend and contract along the one direction. An apparatus for manufacturing a composite stretchable member having a possible high stretchable region and a low stretchable region that is less stretchable than the high stretchable region, the first sheet material, the second sheet material, and these Means for conveying a composite sheet including a plurality of the elastic members extending in one direction arranged in a stretched state between the two sheet materials along the one direction; and a first processing for the composite sheet. A first processing unit, and a second processing unit that is positioned downstream of the first processing unit in the conveying direction and performs a second processing on the composite sheet, the first processing unit including a first anvil roll A first processing roll, and the second processing section includes a second anvil roll and a second processing roll. A first processing section that processes a region closer to the outside in the width direction perpendicular to the conveying direction with respect to a processing region including a region to be formed on the composite sheet and forming the low stretchable region. And the second processing section is configured to process a region closer to the inner side than the region closer to the outer side.

<17> The first processing unit includes a seal roll as the first processing roll, and the second processing unit includes a cut roll as the second processing roll, and the composite sheet includes the first processing unit, The composite elastic member according to <16>, wherein the first sheet material is conveyed so as to face the seal roll, and the second sheet material is conveyed to face the cut roll in the second processing unit. Manufacturing equipment.
<18> The first processing unit includes a cut roll as the first processing roll, the second processing unit includes a seal roll as the second processing roll, and the composite sheet includes the first processing unit, The composite elastic member according to <16>, wherein the first sheet material is conveyed so as to face the cut roll, and the second processing member is conveyed so as to face the seal roll in the second processing section. Manufacturing equipment.
<19> The first processing unit includes a seal roll as the first processing roll, the second processing unit includes another seal roll as the second processing roll, and the composite sheet includes the first processing unit. The composite according to <16>, wherein the first sheet material is conveyed so as to face the seal roll, and the second processing portion is conveyed so as to face the seal roll in the second processing section. Equipment for manufacturing elastic members.
<20> The first processing unit includes a cut roll as the first processing roll, the second processing unit includes another cut roll as the second processing roll, and the composite sheet includes the first processing unit. The composite according to <16>, wherein the first sheet material is conveyed so as to face the cut roll and the second processing unit is conveyed so as to face the cut roll in the second processing section. Equipment for manufacturing elastic members.
<21> A first sheet material, a second sheet material, and a plurality of elastic members extending in one direction arranged in an expanded state between the two sheet materials, and stretchable along the one direction. An apparatus for manufacturing a composite stretchable member having a possible high stretchable region and a low stretchable region that is less stretchable than the high stretchable region, the first sheet material, the second sheet material, and these Means for conveying a composite sheet including a plurality of the elastic members extending in one direction arranged in a stretched state between the two sheet materials along the one direction; and a first processing for the composite sheet. A first processing unit, and a second processing unit that is positioned downstream of the first processing unit in the conveying direction and performs a second processing on the composite sheet, the first processing unit including a first anvil roll A first processing roll, and the second processing section includes a second anvil roll and a second processing roll. A first processing section that processes a region closer to the inside in the width direction perpendicular to the conveying direction with respect to a processing region including a region to be formed on the composite sheet and forming the low stretchable region. And the second processing section is configured to process a region closer to the outer side than the region closer to the inner side.

<22> The first processing unit includes a cut roll as the first processing roll, and the second processing unit includes a seal roll as the second processing roll, and the composite sheet includes the first processing unit, The composite elastic member according to <21>, wherein the first sheet material is conveyed so as to face the cut roll, and the second processing portion is conveyed so as to face the seal roll in the second processing section. Manufacturing equipment.
<23> The first processing unit includes a seal roll as the first processing roll, the second processing unit includes a cut roll as the second processing roll, and the composite sheet includes the first processing unit, The composite elastic member according to <21>, wherein the first sheet material is conveyed so as to face the seal roll, and the second sheet material is conveyed so as to face the cut roll in the second processing section. manufacturing device.
<24> The first processing unit includes a seal roll as the first processing roll, the second processing unit includes another seal roll as the second processing roll, and the composite sheet includes the first processing unit. The composite according to <21>, wherein the first sheet material is conveyed so as to face the seal roll, and the second processing portion is conveyed so as to face the seal roll in the second processing section. Equipment for manufacturing elastic members.
<25> The first processing unit includes a cut roll as the first processing roll, the second processing unit includes another cut roll as the second processing roll, and the composite sheet includes the first processing unit. The composite according to <21>, wherein the first sheet material is conveyed so as to face the cut roll and the second processing portion is conveyed so as to face the cut roll. Equipment for manufacturing elastic members.
<26> In any one of the above items <16> to <25>, in the first processing portion, a diameter of the shaft of the first anvil roll is smaller than a diameter of the first processing roll shaft. Manufacturing equipment for composite elastic members.

<27> In any one of the items <16> to <26>, in the second processing unit, a diameter of the shaft of the second anvil roll is smaller than a diameter of the second processing roll shaft. Manufacturing equipment for composite elastic members.
<28> The apparatus for producing a composite elastic member according to any one of <16> to <27>, wherein both rolls in the first processing section are heatable.
<29> The apparatus for producing a composite elastic member according to any one of <16> to <28>, wherein both rolls in the second processing section can be heated.

DESCRIPTION OF SYMBOLS 1 1st sheet material 2 2nd sheet material 3 Composite elastic member 4 Elastic member 5a 1st high elastic region 5b 2nd high elastic region 6,7 Low elastic region 8 Joining part 9 Cutting position 10 of elastic member Composite elastic member Manufacturing device 11 First processing section 12 Second processing section 13, 14 Anvil rolls 13a, 14a Peripheral surface 15 Composite sheet 16 Composite sheet 20 after processing Seal roll 21 Projection 30 Cut roll 31 Cutting blade 41 First processed area 42 First 2 Work area 42a Planned area 42b for forming the low stretch area Planned area X for forming the second high stretch area Longitudinal direction Y Width direction

Claims (11)

A first sheet material, a second sheet material, and a plurality of elastic members extending in one direction disposed between the two sheet materials in a stretched state, and capable of expanding and contracting along the one direction A method for producing a composite stretchable member having a stretchable region and a low stretchable region that is less stretchable than the high stretchable region,
A composite sheet including the first sheet material, the second sheet material, and a plurality of the elastic members extending in one direction arranged between the two sheet materials along the one direction. And introducing the first processing portion to the first processing portion and then introducing the second processing portion downstream of the first processing portion in the transport direction to perform the second processing. Have
The first processing unit includes a first anvil roll and a first processing roll, and the second processing unit includes a second anvil roll and a second processing roll,
For the region to be processed that includes the planned region for forming the low expansion / contraction region in the composite sheet, a region closer to the outside in the width direction perpendicular to the transport direction is processed in the first processing unit, and in the second processing unit A method for manufacturing a composite stretchable member, wherein a region closer to the inner side than the region closer to the outer side is processed. The first processing unit includes a seal roll as the first processing roll, and the second processing unit includes a cut roll as the second processing roll,
The composite sheet is joined to the outer region by joining the first sheet material and the second sheet material with the seal roll in the first processing portion, and the second processing portion. 2. The method of manufacturing a composite stretchable member according to claim 1, wherein the low stretchable region is formed by cutting the region closer to the inside by cutting the elastic member with the cut roll. A first sheet material, a second sheet material, and a plurality of elastic members extending in one direction disposed between the two sheet materials in a stretched state, and capable of expanding and contracting along the one direction A method for producing a composite stretchable member having a stretchable region and a low stretchable region that is less stretchable than the high stretchable region,
A composite sheet including the first sheet material, the second sheet material, and a plurality of the elastic members extending in one direction arranged between the two sheet materials along the one direction. And introducing the first processing portion to the first processing portion and then introducing the second processing portion downstream of the first processing portion in the transport direction to perform the second processing. Have
The first processing unit includes a first anvil roll and a first processing roll, and the second processing unit includes a second anvil roll and a second processing roll,
With respect to the region to be processed including the planned region for forming the low stretchable region in the composite sheet, the first processing unit processes a region closer to the inside in the width direction perpendicular to the conveyance direction, and the second processing unit A method for manufacturing a composite stretchable member, wherein a region closer to the outer side than the region closer to the inner side is processed. The first processing unit includes a cut roll as the first processing roll, and the second processing unit includes a seal roll as the second processing roll,
In the first processing portion, the composite sheet has the low stretch region formed by cutting the region closer to the inside by cutting the elastic member with the cut roll, and in the second processing portion, The manufacturing method of the composite elastic member of Claim 3 which joins the area | region near the said outer side by joining the said 1st sheet material and the said 2nd sheet material with the said seal roll.   The distance that the composite sheet travels in the space between the first anvil roll in the first processing section and the second anvil roll in the second processing section is the first processing section in the first processing section. The manufacturing method of the composite elastic member as described in any one of Claims 1 thru | or 4 made shorter than the circumferential length of a roll.   In the said 1st process part, the diameter of the axis | shaft of a said 1st anvil roll is smaller than the diameter of the said 1st process roll axis | shaft, The composite elastic | stretch member as described in any one of Claim 1 thru | or 5 Production method.   The composite elastic member according to any one of claims 1 to 6, wherein a diameter of the shaft of the second anvil roll is smaller than a diameter of the second processing roll shaft in the second processing portion. Production method.   Both rolls in the first processing section are heated, and the heating temperature of the first anvil roll is lower than the heating temperature of the first processing roll. The manufacturing method of the composite elastic member of description.   Both rolls in the second processing section are heated, and the heating temperature of the second anvil roll is lower than the heating temperature of the second processing roll. The manufacturing method of the composite elastic member of description. A first sheet material, a second sheet material, and a plurality of elastic members extending in one direction disposed between the two sheet materials in a stretched state, and capable of expanding and contracting along the one direction An apparatus for producing a composite stretchable member having a stretchable region and a low stretchable region having lower stretchability than the high stretchable region,
A composite sheet including the first sheet material, the second sheet material, and a plurality of the elastic members extending in one direction arranged between the two sheet materials along the one direction. A first processing unit that performs the first processing on the composite sheet, and a second processing that performs the second processing on the composite sheet that is located downstream of the first processing unit in the transport direction. And
The first processing unit includes a first anvil roll and a first processing roll, and the second processing unit includes a second anvil roll and a second processing roll,
For the region to be processed that includes the planned region for forming the low stretchable region in the composite sheet, the first processing unit is configured to process a region closer to the outside in the width direction perpendicular to the conveyance direction, The said 2nd process part is a manufacturing apparatus of the composite elastic | stretch member made to process the area | region nearer than the area | region near this outer side. A first sheet material, a second sheet material, and a plurality of elastic members extending in one direction disposed between the two sheet materials in a stretched state, and capable of expanding and contracting along the one direction An apparatus for producing a composite stretchable member having a stretchable region and a low stretchable region having lower stretchability than the high stretchable region,
A composite sheet including the first sheet material, the second sheet material, and a plurality of the elastic members extending in one direction arranged between the two sheet materials along the one direction. A first processing unit that performs the first processing on the composite sheet, and a second processing that performs the second processing on the composite sheet that is located downstream of the first processing unit in the transport direction. And
The first processing unit includes a first anvil roll and a first processing roll, and the second processing unit includes a second anvil roll and a second processing roll,
The first processing unit is configured to process a region closer to the inside in the width direction perpendicular to the conveyance direction with respect to the processing region including the planned region for forming the low expansion / contraction region in the composite sheet, The said 2nd process part is a manufacturing apparatus of the composite elastic | stretch member made to process the area | region near the outer side rather than the area | region near this inner side.

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