JP5624868B2 - Method for manufacturing absorbent article - Google Patents

Description

  The present invention relates to a method for manufacturing an absorbent article such as a disposable diaper.

  From the standpoint of saving materials as much as possible, reducing waste as much as possible, environmentally friendly, and reducing costs, a waist panel material with fastening tape is manufactured in a separate process, and the rectangular absorbency including the absorber An unfolded disposable diaper manufactured by adding this waist panel material to a main body is known. The waist panel material is preferably a stretchable member from the viewpoint of wearability, and the waist panel material is generally formed using a stretchable film. However, since a stretchable film is expensive, it is preferable to form a waist panel material using a so-called thread rubber that is a general-purpose elastic member. However, the stretch direction of the waist panel material formed using the stretched rubber thread is generally the same direction as the transport direction of the absorbent main body, and the stretch direction of the waist panel material required when wearing the deployable disposable diaper The direction is orthogonal. Therefore, when manufacturing a deployable disposable diaper by adding a waist panel material formed using thread rubber to the absorbent main body in an in-line process, the waist panel material formed using thread rubber is inverted 90 degrees and absorbed. It is necessary to add to the sex body. Thus, since the apparatus which reverses a waist panel material 90 degree | times is needed separately, an increase in capital investment will be caused.

  In order to avoid using the 90-degree reversing device as described above, for example, in Patent Document 1, thread rubber is wound spirally between both conveyor belts, and the thread rubber wound spirally is bonded in advance. The elastic sheet is manufactured by sandwiching and fixing between the two strip-shaped basic sheets coated with the agent, and then cutting the thread rubber portion extending from the end of the strip-shaped basic sheet with a cutter. The manufacturing method of the diaper which manufactures the diaper which has a stretchable waist panel material by attaching this manufactured elastic sheet to the diaper manufactured separately is described.

  However, in the technique described in Patent Document 1, it is difficult to match the edges of the two strip-shaped basic sheets. If the edges of the basic sheets do not match, the waist panel looks bad. . Moreover, in the technique described in Patent Document 1, since the extra thread rubber portion is cut using a cutter outside the end portion of the belt-shaped basic sheet, the end portion of the thread rubber is the end of the elastic sheet. It may extend outward from the part, and in such a case, the waist panel looks bad.

JP 2010-22588 A

  Therefore, the subject of this invention is providing the manufacturing method of the absorbent article which can eliminate the fault which the prior art mentioned above has.

  The present invention is a method for producing an absorbent article for continuously producing an absorbent article having stretchable waist panels extending from both side edges of a rectangular absorbent body including an absorbent body, the stretchable article being The waist panel is formed of an elastic sheet in which a thread-like elastic body is fixed between a pair of belt-like sheets in a state where the thread-like elastic body extends in a direction intersecting the conveyance direction of the belt-like sheet. An integration step in which an elastic body is wound around a longitudinal structure for yarn conveyance, the wound elastic body is conveyed by the longitudinal structure for yarn conveyance, and then sandwiched and fixed between the belt-like sheets; An elastic sheet forming step of cutting the thread-like elastic body extending from both ends in the width direction of the belt-like sheet to form a continuous body of the elastic sheet, and a pair of the belt-like sheets in the width direction. In the center By dividing and cutting the mutual position of the continuous body of two stretchable sheets obtained by the splitting step that is continuously cut along the transport direction of the sheet, and the stretchable sheet forming step and the splitting step A pair of the elastic waist panels in an individual state is formed, and the pair of the elastic waist panels are formed by the splitting process such that each cutting edge faces outward in the width direction of the absorbent article and the absorbent. Joining to a continuous body of the constituent material of the absorbent main body so as to extend from both side edges of the absorbent main body of the article, and cutting the absorbent article continuously by cutting between adjacent absorbent bodies The manufacturing method of the absorbent article which has an absorbent article formation process to manufacture is provided.

  According to the method for manufacturing an absorbent article of the present invention, the edges of the waist panel are aligned, and an absorbent article having a good appearance can be efficiently manufactured.

FIG. 1 is a plan view showing a deployable disposable diaper having a stretchable waist panel obtained by an embodiment of the present invention. FIG. 2 is a perspective view showing a stretchable sheet forming portion of a manufacturing apparatus suitably used for carrying out the manufacturing method of the embodiment of the present invention. FIG. 3 is a perspective view showing a configuration upstream of the elastic body winding means shown in FIG. FIG. 4 is a perspective view showing a diaper forming part of a manufacturing apparatus suitably used for carrying out the manufacturing method of the embodiment of the present invention. FIG. 5A is a plan view showing an adhesive application pattern, and FIG. 5B is a plan view for explaining the relationship between the adhesive application position and the position where the seal portion is formed. Drawing 6 is a figure explaining a process until it forms an elastic waist panel from an elastic sheet and forms a diaper which has an elastic waist panel.

Hereinafter, the manufacturing method of the absorbent article of this invention is demonstrated, referring drawings based on the preferable embodiment.
The absorbent article which has an elastic waist panel manufactured in this embodiment is, for example, a deployable disposable diaper 1 as shown in FIG. Therefore, first, the unfolded disposable diaper 1 (hereinafter also referred to as “diaper 1”) having the stretchable waist panel 3 manufactured according to the present embodiment will be described.

As shown in FIG. 1, the diaper 1 includes a ventral side A located on the abdomen side of the wearer at the time of wearing, a dorsal side B positioned on the dorsal side, and between the ventral side A and the back side B. It has the absorptive main body 2 which has the crotch part C located, and the elastic | stretch elastic waist panels 3 and 3 extended from the both-sides edge of the back side part B, respectively. As shown in FIG. 1, the diaper 1 has panel members 4 and 4 extending from both side edges of the abdominal side A. In addition, as shown in FIG. 1, the absorptive main body 2 of the diaper 1 has a rectangular shape in a state of being expanded in a planar shape. Moreover, as shown in FIG. 1, the panel material 4 of the diaper 1 has a trapezoidal shape in a state of being spread in a flat shape, and the lower bottom side having a long length is formed by an absorbent body or an adhesive body by means such as adhesive or fusion. 2 is fixed.
In the following description, the longitudinal direction of the absorbent main body 2 (also the longitudinal direction of the diaper 1) will be described as the Y direction, and the width direction of the absorbent main body 2 (also the width direction of the diaper 1) will be described as the X direction.

  Each of the pair of stretchable waist panels 3 and 3 has a rectangular shape in a state of being expanded in a planar shape. Each stretchable waist panel 3 has two sheets 5 and 6 and a plurality of thread-like elastic bodies 7 arranged in a stretched state between the two sheets 5 and 6. Each stretchable waist panel 3 is composed of a stretchable sheet that is fixed between a pair of sheets 5 and 6 in a state where the thread-like elastic body 7 extends in a direction intersecting the Y direction. Specifically, as shown in FIG. 1, each stretchable waist panel 3 is in a direction (X direction) orthogonal to the Y direction between two sheets 5 and 6 having the same shape and the same size. The elongated thread-like elastic bodies 7 are arranged at substantially equal intervals in the Y direction and are integrally fixed by means such as an adhesive or fusion. More specifically, the X-direction outer side edges of the two sheets 5 and 6 are aligned, and the X-direction outer side ends of the respective thread-like elastic bodies 7 with respect to the end edges, Each of the two sheets 5 and 6 does not extend outward from the edge. Accordingly, the X-direction outer edge (edge) of the stretchable waist panel 3 is aligned. Moreover, each elastic waist panel 3 has the seal | sticker part 9 extended continuously in a Y direction along the edge of the X direction outer side, as shown in FIG. In the thus formed rectangular stretchable waist panel 3, a fastening tape 8 is fixed to the outer end of the X direction by means such as adhesive or fusion. The rectangular elastic waist panel 3 has an X-direction inner end fixed to the back side B of the absorbent main body 2 by means such as adhesive or fusion, and the X of the back side B is fixed. It is connected outside in the direction. Therefore, the diaper 1 has the X direction outward edge of the stretchable waist panel 3 aligned, and the appearance is good. In addition, although the elastic waist panel 3 manufactured by this embodiment has the seal part 9, it does not need to have it. Moreover, although the threadlike elastic body 7 which the elastic waist panel 3 (elastic sheet) manufactured by this embodiment has is extended in the direction orthogonal to the Y direction, it is extended in the direction crossing the Y direction. Just do it.

  In the present diaper 1, the elastic sheet constituting the elastic waist panel 3 is such that the sheet conveyance direction y during production is parallel to the Y direction, and the direction x perpendicular to the sheet conveyance direction during production coincides with the X direction. As is shown, it is fixed to the absorbent main body 2.

  As shown in FIG. 1, the rectangular absorbent main body 2 includes a liquid-permeable top sheet 21, a liquid-impermeable or water-repellent back sheet 22, and a liquid interposed between the two sheets 21 and 22. And a retaining absorber 23. As shown in FIG. 1, the absorbent main body 2 includes a top sheet 21 that forms the inner surface of the diaper 1 and a back sheet 22 that forms the outer surface of the diaper 1, with an absorber 23 interposed between the two sheets 21 and 22. It is formed by joining. Moreover, the absorptive main body 2 is provided with three-dimensional guard forming sheets 24, 24 along both sides in the Y direction, as shown in FIG. The three-dimensional guard forming sheet 24 is fixed to the topsheet 21 along both sides in the Y direction of the absorbent main body 2. Each three-dimensional guard forming sheet 24 has a three-dimensional guard-forming elastic member 25 along the vicinity of the inner edge on the inner side in the X direction. A portion having a predetermined width is separated from the top sheet 21 to form a three-dimensional guard. Moreover, the elastic member 26 for leg gather formation is distribute | arranged to the part distribute | arranged around the leg of the longitudinal direction both sides of the absorptive main body 2. At the time of wearing, a leg gather is formed by the contraction of the elastic member 26 and fits well around the legs.

The material for forming the diaper 1 will be described.
As the sheet | seats 5 and 6 and the panel material 4 which comprise the elastic waist panel 3, if normally used for absorbent articles, such as a disposable diaper, it can be especially used without a restriction | limiting. For example, as the sheets 5 and 6 and the panel material 4, a non-woven fabric, a woven fabric, a film, or a laminated sheet thereof can be used. As the surface sheet 21 and the back surface sheet 22 constituting the absorbent main body 2, as long as they are usually used for absorbent articles such as disposable diapers, they can be used without particular limitation. For example, a hydrophilic and liquid-permeable non-woven fabric can be used as the top sheet 21, and a liquid-impermeable or water-repellent resin film or a laminate of a resin film and a non-woven fabric is used as the back sheet 22. be able to. As the absorbent body 23, an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core in which water-absorbing polymer particles are held therein, a core wrap made of water-permeable thin paper or non-woven fabric. What was covered with the sheet | seat etc. can be used. As the three-dimensional guard forming sheet 24 constituting the three-dimensional guard, a stretchable film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used. Examples of the elastic member 25 constituting the thread-like elastic body 7 and the three-dimensional guard include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, and polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene. A thread-like stretchable material made of, for example, can be used. The filamentous elastic body in the present invention includes not only those having a circular or square cross section but also those having a narrow band shape such as an ellipse or a rectangular cross section, and a multifilament type can also be used. The width | variety (or diameter) of a thread-like elastic member is 0.1-3 mm, for example, Preferably it is 1 mm or less. As the fastening tape 8, for example, a tape formed by attaching a hook member of a mechanical fastener to one surface of a tape base material such as a nonwoven fabric by heat fusion or an adhesive can be used.

Next, the preferable embodiment of the manufacturing method of the absorbent article of this invention is demonstrated, referring an example for the case where the diaper 1 which has the elastic waist panel 3 mentioned above is manufactured.
FIG. 2 schematically shows a stretchable sheet forming portion 11 </ b> A that is preferably used in a method for producing a stretchable waist panel 3 (stretchable sheet) in a production apparatus that is preferably used in the method for producing the diaper 1 of this embodiment. FIG. 3 is a perspective view showing a configuration upstream of the rotary arm (elastic body winding means) of the stretchable sheet forming portion 11A shown in FIG. 2, and FIG. It is a perspective view which shows the structure of the downstream of the elastic sheet formation part 11A of the manufacturing apparatus used suitably for the manufacturing method of the diaper 1, and uses an elastic sheet manufactured by the elastic sheet formation part 11A, and an elastic waist An example of the absorbent article (diaper) formation part 11B which forms the panel 3 and manufactures the diaper 1 is shown typically. Thus, the manufacturing apparatus which manufactures the diaper 1 consists of the elastic sheet forming part 11A which forms the elastic sheet used for the elastic waist panel 3, and the elastic sheet manufactured by the elastic sheet forming part 11A. It is divided roughly into a diaper forming part 11B for manufacturing a diaper 1 having a stretchable waist panel 3.

The stretchable sheet forming portion 11A shown in FIG. 2 is a part that continuously manufactures the stretchable sheet 30 used for the stretchable waist panel 3, and is a direction (x direction) orthogonal to the sheet conveying direction (y direction). ) Are provided with a rotating arm (elastic body winding means) 14 for winding an elastic body for continuously winding the thread-like elastic body 7 on a pair of conveying belts 12 and 13 separated from each other. Further, the elastic sheet forming portion 11A continuously feeds the thread-like elastic body 7 and introduces the thread-like elastic body 7 into the rotating arm 14 in an expanded state, as shown in FIG. As described above, the elastic elastic body 7 is paired with a pair of belt-like sheets by the adhesive application means 19 for applying an adhesive to the inner surface of the belt-like sheet 60 (the surface facing the belt-like sheet 50) and the pair of transport belts 12 and 13 described above. Conveying means 16 for conveying between 50 and 60, integrated means 17 for fixing the stretched elastic fiber 7 between a pair of belt-like sheets 50 and 60 using a pair of nip rollers 171 and 172, and a belt-like shape The cutting means 18 for cutting the portions of the thread-like elastic body 7 extending from both ends in the width direction of the sheets 50, 60 and the pair of belt-like sheets 50, 60 are sealed, and the seal portion 9 is attached along the y direction. Continuous And a sealing means 20 for forming.
In this embodiment, the pair of conveying belts 12 and 13 is the longitudinal structure for yarn conveyance in the present invention, and the longitudinal direction of the longitudinal structure for yarn conveyance is the extending direction of the two conveying belts 12 and 13 ( y direction).

The conveyance direction of the sheet is the conveyance direction of the thread-like elastic body 7 wound around the pair of conveyance belts 12 and 13 or the conveyance direction of the sheet integrated with the thread-like elastic body 7 (band-like sheets 50 and / or 60). is there.
The y direction of the arrow in the drawing indicates the conveyance direction of the thread-like elastic body 7 and the pair of belt-like sheets 50 and 60, which is the sheet conveyance direction, and the elastic waist panel 3 (extension / contraction) finally produced according to this embodiment. The conveyance direction of the diaper 1 attached with the stretchable waist panel 3 (stretchable sheet) is the same direction. Moreover, the x direction of the arrow in the figure is the width direction of the belt-like sheets 50 and 60, and is the direction orthogonal to the sheet conveying direction. Moreover, the z direction of the arrow in the figure is a direction in which a pair of nip rollers 171 and 172 described later face each other.

  As shown in FIG. 2, the conveyor belt 12 of the conveyor means 16 is an endless rotating belt, and includes an upper conveyor belt 12a and a lower conveyor belt 12b. The upper conveyance belt 12a is stretched between pulleys 121 and 122 whose rotation axis direction is arranged in the z direction. The lower conveyance belt 12b is bridged between pulleys 124 and 125 whose rotation axis direction is arranged in the z direction. The pulley 121 is located on the downstream side of the pair of nip rollers 171 and 172 for fixing the elongated thread-like elastic body 7 between the pair of belt-like sheets 50 and 60, and the pulley 122 is located on the upstream side of the nip rollers 171 and 172. Is located. The pulley 124 is located on the downstream side of the nip rollers 171 and 172, and the pulley 125 is located on the upstream side of the nip rollers 171 and 172. The pulleys 121 and 124 are arranged at the same position in two upper and lower stages. Further, the pulleys 122 and 125 are also arranged in two upper and lower stages at the same position. Further, the pulley 121 (pulley 124) and the pulley 122 (pulley 125) are located outward in the x direction from the x direction end portions of the belt-like sheets 50 and 60. Each of the pulley 121 and the pulley 124 is provided with a servo motor (not shown) connected to its drive unit, so that the rotational speeds of the upper conveyance belt 12a and the lower conveyance belt 12b can be changed.

  As shown in FIG. 2, the conveyance belt 13 of the conveyance means 16 is an endless rotating belt, similar to the conveyance belt 12, and includes an upper conveyance belt 13a and a lower conveyance belt 13b. The upper conveyance belt 13a is stretched between pulleys 131 and 132 whose rotation axis direction is arranged in the z direction. The lower conveyance belt 13b is bridged between pulleys 134 and 135 whose rotation axis direction is arranged in the z direction. The pulley 131 is located on the downstream side of the pair of nip rollers 171 and 172, and the pulley 132 is located on the upstream side of the nip rollers 171 and 172. The pulley 134 is located on the downstream side of the nip rollers 171 and 172, and the pulley 135 is located on the upstream side of the nip rollers 171 and 172. The pulleys 131 and 134 are arranged in two upper and lower stages at the same position. Further, the pulleys 132 and 135 are also arranged in two upper and lower stages at the same position. Further, the pulley 131 (pulley 134) and the pulley 132 (pulley 135) are located outward in the x direction from the x direction ends of the belt-like sheets 50 and 60. Each of the pulley 131 and the pulley 134 is provided with a servo motor (not shown) connected to its drive unit, and the rotational speed of each of the upper conveyance belt 13a and the lower conveyance belt 13b can be changed.

As shown in FIG. 2, the conveyor belt 12 (the upper conveyor belt 12 a and the lower conveyor belt 12 b) is bridged between the pulleys 121 and 122 and the pulleys 124 and 125 arranged as described above, and the pair of nip rollers 171. , 172 from the upstream side to the downstream side. Further, the conveyor belt 13 (the upper conveyor belt 13a and the lower conveyor belt 13b) is stretched over the pulleys 131 and 132 and the pulleys 134 and 135 arranged as described above, and the upstream side of the pair of nip rollers 171 and 172. To the downstream side. Further, the transport belt 12 (upper transport belt 12a and lower transport belt 12b) and the transport belt 13 (upper transport belt 13a and lower transport belt 13b) are located outside the belt-like sheets 50 and 60 in the x direction and are symmetrical with each other. It is arranged in. The transport belt 12 (upper transport belt 12a, lower transport belt 12b) and transport belt 13 (upper transport belt 13a, lower transport belt 13b) rotate so that their outer peripheral sides move in the y direction.
The transport belt 12 (upper transport belt 12a, lower transport belt 12b) and transport belt 13 (upper transport belt 13a, lower transport belt 13b) are preferably timing belts. The rotational speeds of the transport belt 12 (upper transport belt 12a, lower transport belt 12b) and transport belt 13 (upper transport belt 13a, lower transport belt 13b), that is, the driving units of the pulley 121 and pulley 124, and the pulley 131 and pulley 134, respectively. The rotational speed of a servo motor (not shown) disposed in the diaper 1 is controlled by a control unit (not shown) included in the diaper 1 manufacturing apparatus.

  As shown in FIG. 2, the rotating arm 14 includes an arm portion 141 having a shaft portion 142, a revolving portion 143, and a connecting portion 144, and a drive mechanism 147 that rotates the arm portion 141 around the center line of the shaft portion 142. And. The connecting portion 144 is coupled to each of the shaft portion 142 and the rotating portion 143 at an angle, and the rotating portion 143 and the shaft portion 142 are substantially parallel. The shaft portion 142 has an introduction port 145 for the thread-like elastic body 7 at one end thereof, and the circumferential portion 143 has a lead-out port 146 for the thread-like elastic body 7 at one end thereof, which is introduced from the introduction port 145. The thread-like elastic body 7 is smoothly led out from the outlet port 146 through the shaft portion 142, the connecting portion 144 and the rotating portion 143. Various known members (a driven roll, a low friction member, etc.) that can reduce friction with the thread-like elastic body 7 can be disposed in the bent portion of the arm portion 141, the outlet port 146, and the like.

In the circulation part 143, the position of the outlet 146 is downstream from the upstream end of the transport belt 12 (upper transport belt 12a, lower transport belt 12b) and transport belt 13 (upper transport belt 13a, lower transport belt 13b). It is arranged in. The rotary arm 14 has a servo motor 148 attached to its drive part (shaft part 142), and the rotation part 143 causes the rotation part 143 to move the conveyor belt 12 (the upper conveyor belt 12a and the lower conveyor belt 12b) by the rotation of the servo motor 148. And the outer circumference of the conveyor belt 13 (the upper conveyor belt 13a and the lower conveyor belt 13b) is circulated.
By such a rotating arm 14, the thread-like elastic body 7 is moved at the upstream end of the transport belt 12 (upper transport belt 12a, lower transport belt 12b) and transport belt 13 (upper transport belt 13a, lower transport belt 13b). Moreover, it can wind continuously on each outer peripheral side. The rotation speed of the rotary arm 14, that is, the rotation speed of the servo motor 148 is controlled by a control unit (not shown) included in the diaper 1 manufacturing apparatus.

  As shown in FIG. 3, the elastic body supply means 15 is located on the downstream side of the bobbin 70 around which the thread-like elastic body 7 is wound. A feeding roller 152 that is positioned to feed the thread-like elastic body 7 from the bobbin 70 and a tension measuring device 153 that is positioned downstream of the feeding roller 152 and measures the tension are provided. The feeding roller 152 has a rotational axis direction in the x direction. A servo motor (not shown) is attached to the driving portion of the feeding roller 152. The feeding roller 152 is used with the thread-like elastic body 7 wound twice around the outer periphery thereof. Based on the detection output from the tension measuring device 153, the rotation speed of the servo motor (not shown), that is, the rotation speed of the feeding roller 152 is controlled by a control unit (not shown) included in the diaper 1 manufacturing apparatus. The thread-like elastic body 7 can be unwound from the bobbin 70.

  As shown in FIG. 3, the elastic body supply means 15 includes a feed roller 156 located on the downstream side of the feeding roller 152. The feed roller 156 is disposed between the rotating arm 14 and the feeding roller 152, and the rotation axis direction thereof is disposed in the x direction. The feed roller 156 has a servo motor (not shown) attached to its drive unit. The rotational speed of the servo motor (not shown), that is, the rotational speed of the feed roller 156 is controlled by a control unit (not shown) provided in the diaper 1 manufacturing apparatus.

  As shown in FIG. 2, the adhesive application unit 19 includes an adhesive dispenser 191 on the upstream side of a nip roller 172 described later. The adhesive dispenser 191 is arranged such that the discharge port of the adhesive dispenser 191 is directed toward the inner surface of the belt-like sheet 60 so that the adhesive is applied to the inner surface of the belt-like sheet 60 (the surface facing the belt-like sheet 50). Has been. In addition, in the manufacturing apparatus of the diaper 1, the adhesive dispenser 191 is disposed so as to apply an adhesive to the inner surface of the belt-like sheet 60, but the inner surface of the belt-like sheet 50 (facing the belt-like sheet 60). Surface) may be arranged so as to apply an adhesive, or may be arranged so as to apply an adhesive to the inner surface of each of the belt-like sheets 50, 60. As the adhesive dispenser 191, various known ones can be used without particular limitation, and an adhesive is applied to a predetermined application pattern, for example, the central portion in the width direction (x direction) of the belt-like sheets 50 and 60. It is preferable that the adhesive can be applied with an application pattern (see FIG. 5A) having at least the non-application part 9A.

  As shown in FIG. 2, the integration unit 17 includes a pair of nip rollers 171 and 172. As the pair of nip rollers 171, 172, metal cylindrical rollers, cylindrical rollers made of low hardness silicon rubber, or the like can be used in combination without limitation. The pair of nip rollers 171 and 172 has a servo motor (not shown) attached to any one of the drive units, and the rotation speed is controlled by a control unit (not shown) included in the diaper 1 manufacturing apparatus. Drive transmission gears (not shown) are attached to the rotation shafts of the pair of nip rollers 171 and 172, respectively. Based on the production speed of the elastic sheet, the rotational speed of a servo motor (not shown), that is, the rotational speed of one of the nip rollers 171 and 172 can be controlled. At this time, when the drive transmission gear is engaged, the driving force is transmitted to the other nip rollers 172 and 171, and the pair of nip rollers 171 and 172 can be rotated. The pair of nip rollers 171 and 172 applies a nip portion by using a force such as hydraulic pressure, pneumatic pressure, spring, etc. in order to securely fix the stretched elastic thread between the pair of belt-like sheets 50 and 60. The pressure between the nip rollers and the applied pressure at the nip can be adjusted.

  As shown in FIG. 2, the pair of nip rollers 171 and 172 includes an inner peripheral side of the transport belt 12 (upper transport belt 12a and lower transport belt 12b) and a transport belt 13 (upper transport belt 13a and lower transport belt 13b). It is located between the inner circumference side.

As shown in FIG. 2, the cutting means 18 includes a cutter 180 in which a portion where the conveyed elastic elastic body 7 contacts is a sharp cutting blade. The cutter 180 is disposed by a support (not shown) at a position where the thread-like elastic body 7 hits, and the thread-like elastic body 7 is cut by being conveyed by the conveyor belts 12 and 13 and being pressed against the cutter 180. . In the y direction, the cutting means 18 includes a pair of nip rollers 171, 172, pulleys 121, 124 of the conveyor belt 12 (upper conveyor belt 12a, lower conveyor belt 12b), and conveyor belt 13 (upper conveyor belt 13a, lower conveyor). It is located between the pulleys 131 and 134 of the belt 13b).
The position in the x direction where the thread-like elastic body 7 is cut by the cutting means 18 may be between the nip rollers 171 and 172 and the conveyor belts 12 and 13, or the inner and outer circumferences of the conveyor belts 12 and 13, respectively. May be between the outer peripheral portions of the conveyor belts 12 and 13. As the cutting means 18, various known ones that can cut the thread-like elastic body 7 can be used without particular limitation. For example, a cutter roller having a cutting blade extending in the circumferential direction on the outer peripheral surface and the cutting blade It is also possible to use a roller cutter or the like equipped with an anvil roller for receiving the same. Moreover, you may cut | disconnect with a laser, a heat | fever, etc.

  As shown in FIG. 2, the elastic sheet forming portion 11 </ b> A is a thread-like elastic body 7 positioned on both outer sides in the x direction of the pair of belt-like sheets 50 and 60 cut by the pair of cutters 180 serving as the cutting means 18. Are provided with suction portions 183 and 183 for sucking unnecessary portions. The suction portions 183 and 183 are arranged on both outer sides of the cutter 180 in the x direction.

  As shown in FIG. 2, the sealing unit 20 is located between the integration unit 17 and the cutting unit 18, and includes a heat sealing roller 201 and a receiving roller 202. The peripheral surface has a convex portion 203 that protrudes in the circumferential direction. The receiving roller 202 has a flat roller shape. The convex portion 203 of the heat sealing roller 201 is located at the center in the x direction of the pair of belt-like sheets 50 and 60, and a pair of belt-like shapes are formed between the convex portion 203 of the heat sealing roller 201 and the flat receiving roller 202. By passing the sheets 50 and 60, the pair of belt-like sheets 50 and 60 can be heat-sealed to form the seal portion 9 at the center in the x direction, and the seal portion 9 can be continuously formed along the y direction. Can be formed. In addition, although the sealing means 20 is a heat seal in the manufacturing apparatus of the diaper 1, it may be an ultrasonic seal. In addition, the width | variety (length of x direction) of the convex part 203 of the heat seal roller 201 is the application | coating pattern (refer FIG. 5A) which has the non-application part 9A using the adhesive application means 19, and is the both strip | belt-shaped sheet 50. , 60 is preferably coated with an adhesive on the inner surface thereof, it is preferably substantially the same as or narrower than the width (length in the x direction) of the non-application portion 9A.

  The diaper formation part 11B shown in FIG. 4 forms the elastic waist panel 3 using the elastic sheet 30 manufactured by the elastic sheet formation part 11A, and manufactures the diaper 1 which has the elastic waist panel 3 continuously. It is a part to do. The diaper forming unit 11B includes a dividing unit 21 that continuously cuts a continuous body of the elastic sheet 30 manufactured by the elastic sheet forming unit 11A, and two elastic sheets 30a and 30b obtained by the dividing unit 21. Position adjusting means 22 for exchanging positions of the continuum, panel forming means 23 for forming a pair of individual elastic waist panels 3 and 3, and a material for forming the elastic waist panels 3 and 3 for the absorbent main body 2 And a waist panel joining means 24 for joining to the continuous body.

  The dividing means 21 is located on the downstream side of the stretchable sheet forming portion 11A, and includes a pair of separation cutter rollers 211 and a receiving roller 212 as shown in FIG. The separation cutter roller 211 includes a cutter blade 213 extending in the circumferential direction on the peripheral surface thereof, and the cutter blade 213 is located at the center of the stretchable sheet 30 in the x direction. In addition, the x direction center part of the continuous body of the elastic sheet 30 and the x direction center part of the pair of belt-like sheets 50 and 60 are at the same position in the x direction. By passing a continuous body of the stretchable sheet 30 between the pair of separation cutter rollers 211 and the receiving roller 212, the continuous body of the stretchable sheet 30 is continuously cut along the y direction, and two stretches are stretched. A continuous body of the conductive sheets 30a and 30b can be formed. In addition, in the manufacturing apparatus of the diaper 1, since the seal part 9 is continuously formed in the y direction at the center part in the x direction of the continuous body of the elastic sheet 30, the seal part 9 is specifically formed. The center part in the x direction of the seal part 9 can be continuously cut. The width (length in the x direction) of the continuous body of the two stretchable sheets 30a and 30b is substantially the same. In addition to the separation cutter roller 211, various known devices that can continuously cut the continuous body of the elastic sheet 30 can be used as the dividing unit 21 without any particular limitation.

As shown in FIG. 4, the position adjusting means 22 is composed of a plurality of position adjusting rollers 221... Arranged at predetermined positions and orientations. As shown in FIG. 4, the plurality of position adjusting rollers 221... Are arranged in a continuous path of the stretchable sheet 30 a and the stretchable sheet 30 b in the conveyance path of the stretchable sheet 30 a and the stretchable sheet 30 b. Of the continuous body of the elastic sheet 30a and the continuous cutting edge 91 of the elastic sheet 30b formed by the dividing means 21, respectively. It is arranged so that it can be directed outward in the x direction. The continuum of the contractible sheet 30b and the continuum of the stretchable sheet 30a whose positions have been interchanged by the plurality of position adjusting rollers 221 are separated from each other in the x direction and y in the y direction. It is arranged parallel to the direction. In addition, in the manufacturing apparatus of the diaper 1, as above-mentioned, since the division | segmentation means 21 cut | disconnects on the seal | sticker part 9 continuously, the continuous of the elastic sheet 30a is carried out by several position adjustment roller 221 .... The cutting edge 91 in the body-side seal part 9 and the cutting edge 91 in the seal part 9 on the continuous body side of the stretchable sheet 30b are directed outward in the x direction. Further, as the position adjusting means 22, various known ones can be used without particular limitation in addition to the position adjusting roller 221 as long as the positions in the x direction can be interchanged.
The position adjusting means 22 meanders to adjust the running position and the running angle in order to keep the running position constant after the mutual positions of the continuous body of the stretchable sheet 30a and the continuous body of the compressible sheet 30b are exchanged. It is preferable to provide a correction machine.

As shown in FIG. 4, the panel forming unit 23 is positioned on the downstream side of the position adjusting unit 22 and includes a pair of upper and lower cutter rollers 231 and a receiving roller 232. The pair of upper and lower cutter rollers 231 and the receiving roller 232 are respectively provided in the continuous body of the stretchable sheet 30b and the continuous body of the stretchable sheet 30a whose positions are interchanged. Each cutter roller 231 includes a linear cutter blade 233 extending in the x direction on the peripheral surface thereof. Each cutter blade 233 is arranged wider than the width (length in the x direction) of the continuous body of the elastic sheet 30a or the width (length in the x direction) of the continuous body of the elastic sheet 30b. By passing a continuous body of elastic sheets 30a or a continuous body of elastic sheets 30b spaced apart from each other in the x direction between each pair of upper and lower cutter rollers 231 and the receiving roller 232, a predetermined length in the y direction is obtained. It can cut | disconnect and can form a pair of elastic waist panels 3 and 3 of an individual state continuously.
The panel forming means 23 immediately before supplying the continuous body of the contractible sheet 30b or the continuous body of the elastic sheet 30a whose positions are interchanged between the pair of upper and lower cutter rollers 231 and the receiving roller 232. Further, a holding / conveying conveyor (not shown) for holding the continuous body of the compressible sheet 30b or the continuous body of the elastic sheet 30a and determining the length to be cut is provided.

  As shown in FIG. 4, the waist panel joining means 24 includes an adhesive dispenser (not shown) and a pair of upper and lower pressing rollers 242 and 243. Before the adhesive dispenser (not shown) supplies the continuous body of elastic sheets 30b whose positions have been interchanged, or the continuous body of elastic sheets 30a to the pair of upper and lower cutter rollers 231 and the receiving roller 232, The continuum of the elastic sheet 30b and the continuum of the elastic sheet 30a may be arranged so that the adhesive can be discharged to a predetermined position on the non-skin facing surface. It may be arranged so that the adhesive can be discharged to predetermined positions at both ends in the x direction on the skin facing surface or the non-skin facing surface of a certain belt-like back sheet 220, and is a continuum of the constituent material of the absorbent main body 2. You may distribute | arrange so that an adhesive agent can be discharged to the predetermined position of the x direction both ends in the non-skin opposing surface of a strip | belt-shaped surface sheet.

  As shown in FIG. 4, one pressing roller 242 is divided into left and right so as to correspond to each of the pair of elastic waist panels 3 and 3 in an individual state in this embodiment. As shown in FIG. 4, each pressing roller 242 is the same roll as each receiving roller 232 included in the panel forming unit 23 in this embodiment. As shown in FIG. 4, the other pressing roller 243 is a single roller having a length corresponding to each pressing roller 242 in this embodiment. The pair of upper and lower pressing rollers 242 and 243 introduces a band-shaped back sheet 220 that is a continuum of the constituent material of the absorbent main body 2 between the pair of upper and lower pressing rollers 242 and 243 and a pair of left and right pressing rollers 242 and 243. By introducing a pair of stretchable waist panels 3 and 3 so as to correspond to the pressure rollers 242 and 242, the pair of stretchable waist panels 3 and 3 are joined to the back sheet 220 by being pressed by the pressure rollers 242 and 243. It is configured to be able to.

  Next, the method to manufacture the diaper 1 using the manufacturing apparatus of the diaper 1 mentioned above is demonstrated.

First, as shown in FIG. 3, the thread-like elastic body 7 is continuously fed out, and the fed-out thread-like elastic body 7 is introduced into a rotating arm 14 as an elastic body winding means in an expanded state.
More specifically, the thread-like elastic body 7 is continuously fed out from the bobbin 70 around which the thread-like elastic body 7 is wound using the feeding roller 152. At the time of feeding, based on the detection output of the tension of the thread-like elastic body 7 by the tension measuring device 153, the control unit (not shown) provided in the diaper 1 manufacturing apparatus controls the rotation speed of the unwinding roller 152 and the brake of the tensor 151. The thread-like elastic body 7 is fed out from the bobbin 70 with a predetermined tension.

  Next, as shown in FIG. 2, the thread-like elastic body 7 is introduced into the rotary arm 14. When the thread-like elastic body 7 is introduced, it is introduced into the rotary arm 14 (elastic body winding means) by the feed roller 156 described above. The thread-like elastic body 7 is adjusted to a constant speed and introduced. The introduction speed is a speed corresponding to the winding speed for winding the pair of conveyor belts 12 and 13.

  Next, as shown in FIG. 2, the stretched elastic thread 7 is continuously wound around the pair of transport belts 12 and 13 using the rotating arm 14, and continuously using the pair of transport belts 12 and 13. The wound thread-like elastic body 7 is conveyed between the pair of belt-like sheets 50 and 60. More specifically, the thread-like elastic body 7 supplied to the rotary arm 14 in the extended state is introduced into the arm portion 141 from the introduction port 145 and guided through the shaft portion 142, the connecting portion 143, and the rotating portion 143. Derived from outlet 146. The thread-like elastic body 7 led out from the lead-out port 146 is led out while the rotary arm 14 is rotated, so that the outer peripheral side at the upstream end of the transport belt 12 (upper transport belt 12a, lower transport belt 12b) and The conveyor belt 13 (upper conveyor belt 13a, lower conveyor belt 13b) is wound around the outer peripheral side at the upstream end. Here, the conveyor belt 12 (upper conveyor belt 12a, lower conveyor belt 12b) and the conveyor belt 12 (upper conveyor belt 12a, lower conveyor belt 12b) are rotated by the rotational travel of the conveyor belt 12 (upper conveyor belt 12a, lower conveyor belt 12b). ) And the outer periphery of the conveyor belt 13 (upper conveyor belt 13a, lower conveyor belt 13b), the thread-like elastic body 7 is continuously wound in a spiral shape. The continuously wound thread-like elastic body 7 is conveyed between the pair of downstream belt-like sheets 50 and 60.

  Here, the thread-like elastic body 7 wound around the pair of conveying belts 12 and 13 extends in a direction intersecting with the y direction, and is not arranged in a direction orthogonal to the y direction. In order to correct the wound elastic body 7 in a direction (x direction) orthogonal to the y direction, for example, when the elastic thread 7 is wound as shown in FIG. 12, the rotational speed of the upper transport belt 12 a is made slower than the rotational speed of the lower transport belt 12 b, and the rotational speed of the lower transport belt 13 b is made slower than the rotational speed of the upper transport belt 13 a in the transport belt 13. Thus, the inclination of the thread-like elastic body 7 is gradually changed during the conveyance in the y-direction, and the inclination of the thread-like elastic body 7 is orthogonal to the y-direction before being conveyed between the pair of belt-like sheets 50 and 60 ( x direction).

  The belt-like sheet 50 is previously folded at both ends in the x direction by a sailor (not shown) or the like on the outer surface side, and the conveyor belt 12 (upper conveyor belt 12a, lower conveyor belt 12b) and conveyor belt 13 are used. Supplied between the pair of nip rollers 171 and 172 from the upper side of the upper transport belt 13a and the lower transport belt 13b. In addition, the belt-like sheet 60 is previously folded at both ends in the x direction by a sailor (not shown) or the like on the outer surface side, and the conveyor belt 12 (upper conveyor belt 12a, lower conveyor belt 12b) and conveyor belt 13 are provided. Supplied between the pair of nip rollers 171 and 172 from the lower side (upper conveyance belt 13a, lower conveyance belt 13b).

  As shown in FIG. 2, an adhesive is applied in advance to the inner surface of the belt-like sheet 50 or the belt-like sheet 60 (application process). More specifically, before being supplied between the pair of nip rollers 171, 172, in this embodiment, the adhesive dispenser 191 is used to use the inner surface of the belt-like sheet 60 (the surface facing the belt-like sheet 50). Apply adhesive to The adhesive application pattern may be applied spirally or solidly on the entire surface, but in this embodiment, as shown in FIG. A non-applied portion 9A to which no adhesive is applied is continuously formed in the center portion in the width direction (x direction). Thus, when the non-application part 9A is formed, when the separation cutter roller 211, which will be described later, continuously cuts the central portion in the width direction (x direction) of the elastic sheet 30, the cutter blade of the separation cutter roller 211 is cut. The adhesive does not adhere to 213, the frequency of maintenance can be suppressed, and productivity is improved. Further, when cut at the non-application portion 9A, the stretched thread-like elastic body 7 is contracted, and the thread-like elastic body 7 is difficult to extend from the edges of the belt-like sheet 50 and the belt-like sheet 60. The sheet 30 can be manufactured. The width (length in the x direction) of the non-application part 9A shown in FIG. 5A is preferably 2 to 20 mm, so that the cutter blade 213 does not come off the non-application part 9A even if meandering occurs. More preferably, it is 5-10 mm. Moreover, as shown to Fig.5 (a), the adhesive agent 9B about 0.5-5 mm in width is continuously apply | coated to the strip | belt-shaped sheet | seat 50 or the strip | belt-shaped sheet | seat 60 along the y direction, and it adjoins to x direction. It is preferable to form the stretchable sheet 30 by applying the adhesive 9B with an interval of about 0.5 to 5 mm. By applying the adhesive in such a pattern, it is possible to ensure the adhesive strength of the thread rubber while ensuring air permeability, and to improve the appearance of the wrinkles of the stretchable waist panel 3 to be manufactured.

  Next, the thread-like elastic body 7 is fixed in a stretched state between the pair of belt-like sheets 50 and 60 using the nip rollers 171 and 172. More specifically, a continuous body in which the continuously wound thread-like elastic body 7 is disposed between the pair of belt-like sheets 50 and 60 is supplied between the pair of nip rollers 171 and 172, and the pair of belt-like sheets 50. , 60 is fixed in a stretched state. As described above, the thread-like elastic body 7 is wound around the pair of transport belts 12 and 13 separated in the direction (x direction) perpendicular to the transport direction of the sheets 50 and 60, and the wound thread-like elastic body 7 is wound. In this way, the process until the thread-like elastic body 7 is fixed between the belt-like sheets 50 and 60 by using the nip rollers 171 and 172 after being conveyed by the pair of conveying belts 12 and 13 is carried out. It is the integration process in a form.

  Next, in this embodiment, the pair of belt-like sheets 50 and 60 are sealed with the sealing means 20 at the position of the non-application portion 9A, and the seal portion 9 is continuously formed along the y direction (seal Process). Specifically, as shown in FIG. 2, after the integration step, before cutting the extended portion of the thread-like elastic body 7, which will be described later, with the score cutter roller 181, in this embodiment, the heat having the convex portion 203. Using the seal roller 201 and the receiving roller 202, the pair of belt-like sheets 50 and 60 are heat-sealed at the position of the non-application part 9A, and the seal part 9 is continuously formed along the y direction (FIG. 5). (See (b)). As shown in FIG. 5B, the seal portion 9 has a width (length in the x direction) larger than the width (length in the x direction) of the non-applied portion 9A from the viewpoint of preventing contamination by the adhesive. Narrow is preferred.

  Next, the thread-like elastic body 7 extending from both ends in the width direction (x direction) of the pair of belt-like sheets 50 and 60 is cut to form a continuous body of the stretchable sheet 30. More specifically, the extended portion of the thread-like elastic body 7 is cut using the cutter 180, and the winding state of the thread-like elastic body around the pair of conveying belts 12 and 13 is released by this cutting. As shown to (a), the continuous body of the elastic sheet 30 from which the threadlike elastic body 7 has extended from each width direction (x direction) both end edge of the strip | belt-shaped sheets 50 and 60 is obtained. Next, in the present embodiment, both end portions in the x direction of the belt-like sheets 50 and 60 folded on the outer surface side are refolded by a sailor (not shown) or the like, and from both ends in the width direction (x direction). The elastic sheet 30 in which the thread-like elastic body 7 is not extended is continuously manufactured. In addition, the extended portion of the cut thread-like elastic body 7 is sucked by the suction portion 183.

  As shown in FIG. 4, the continuous body of the stretchable sheet 30 produced as described above, in which the thread-like elastic body 7 does not extend from both edges in the width direction (x direction), is shown in FIG. Cut continuously along the y direction at the center in the width direction (x direction) (dividing step). More specifically, as shown in FIG. 3, using a separation cutter roller 211 having a cutter blade 213 and a receiving roller 212, a continuous body of the elastic sheet 30 is cut at the center in the x direction, and in the y direction. A continuous body of two stretchable sheets 30a and 30b is formed by continuously cutting along. At the inner end in the x direction of the continuous body of the two stretchable sheets 30a and 30b, a cutting edge 91 is continuously formed along the y direction. In the present embodiment, as shown in FIG. 5A, the non-application portion 9A is formed in the center in the width direction (x direction) of the belt-like sheet 60. Therefore, in the dividing step, the non-application portion 9A is formed. Cut the top. More specifically, two stretchable sheets are continuously cut along the y direction at the center in the width direction (x direction) of the non-application portion 9A using the separation cutter roller 211 and the receiving roller 212. A continuous body of 30a and 30b is formed. As described above, in this embodiment, by continuously cutting the non-application portion 9A, the adhesive does not adhere to the cutter blade 213 of the separation cutter roller 211, and the frequency of maintenance can be suppressed. Will improve.

  Further, in the present embodiment, the seal portion 9 is formed on the non-application portion 9A as shown in FIG. 5B. Therefore, in the dividing step, as shown in FIG. Disconnect. Specifically, using the separation cutter roller 211 and the receiving roller 212, the two stretchable sheets 30a are continuously cut along the y direction at the center in the width direction (x direction) of the seal portion 9. , 30b. By cutting in this way, the cutting edge 91 in the seal portion 9 is continuously formed along the y direction at the inner end in the x direction of the continuous body of the two stretchable sheets 30a and 30b. Thus, in this embodiment, by continuously cutting the seal part 9 on the non-application part 9A, the end edge of the waist panel is aligned and the mouth of the end edge is closed. Can be realized. Although it is possible to carry out the closing of the mouth in a separate process, the use of this method can close the mouths of the edges of the left and right waist panels with a single sealing device, which is efficient. Moreover, when the cutting edge 91 is sealed, it is easy to fix the fastening tape 8 and the handling of the elastic waist panels 3 and 3 is facilitated.

  Next, as shown in FIGS. 4 and 6 (b), the mutual positions of the continuous body of the two stretchable sheets 30a and 30b are exchanged and cut as shown in FIGS. 4 and 6 (c). Thus, the pair of elastic waist panels 3 and 3 in an individual state is formed. Specifically, using a plurality of position adjusting rollers 221..., While conveying each of the continuous bodies of the two elastic sheets 30 a and 30 b, they cross each other in the x direction, and are on the continuous body side of the elastic sheet 30 a. The positions of the cutting edge 91 in the seal portion 9 and the cutting edge 91 in the seal portion 9 on the continuum side of the stretchable sheet 30b are switched so as to face outward in the x direction. In addition, a continuous body of two stretchable sheets 30b and 30a whose positions are interchanged using a plurality of position adjusting rollers 221... Are arranged in parallel to the y direction while being separated from each other in the x direction. Then transport.

  And as shown in FIG. 4, between the cutter roller 231 which has the cutter blade 233, and the receiving roller 232, using the conveyor for holding conveyance (not shown) of the elastic sheet 30b mutually spaced apart in the x direction By passing the continuous body and the continuous body of the elastic sheet 30a respectively, as shown in FIG. 4 and FIG. 6C, the individual elastic waist panels 3 are cut along the x direction to be individually separated. The pair of elastic waist panels 3 and 3 are continuously formed.

  Next, as shown in FIG. 4 and FIG. 6 (d), the pair of stretchable waist panels 3, 3 is made of the absorbent article (diaper 1) from which the respective cutting edges 91 formed by the above-described dividing step are manufactured. It joins to the continuum of the constituent material of the absorptive main body 2 so that it may face outward in the width direction (x direction) and may extend from each side edge of the absorptive main body 2 of the absorbent article (diaper 1). More specifically, in this embodiment, using an adhesive dispenser (not shown), an adhesive is applied in advance to predetermined positions at both ends in the x direction on the skin-facing surface of the belt-like back sheet 220, and a pair of upper and lower A pair of stretchable waist panels 3 and 3 are introduced between the pressing rollers 242, 243 on the belt-like back sheet 220 from which the adhesive has been discharged, and they are clamped and joined. In this embodiment, the pair of trapezoidal panel members 4 and 4 manufactured in a separate process by a known method are also used on the belt-like back sheet 220 in the same manner as the pair of stretchable waist panels 3 and 3. Join. In this embodiment, the pair of stretchable waist panels 3 and 3 are joined to the top of the belt-like back sheet 220 (skin facing surface), but below the belt-like back sheet 220 (non-skin facing surface). Or may be joined to a band-shaped surface sheet that is a constituent material of the absorbent main body 2.

  Next, as shown in FIG. 6 (e), a plurality of absorbers 23 are arranged at predetermined intervals in the y direction on the belt-like back sheet 220 (skin facing surface) obtained by joining a pair of elastic waist panels 3 and 3. Is placed, and then a laminated sheet in which the belt-shaped three-dimensional guard forming sheets 240 are fixed is disposed and fixed at both ends in the X direction of the belt-shaped topsheet 210 to form a diaper 1 continuous body. Moreover, the fastening tape 8 is attached to the predetermined position of the outer end part in the x direction of the pair of elastic waist panels 3 and 3. Next, as shown in FIG. 6 (f), the diaper 1 is continuously cut by a known cutting means (not shown) between adjacent absorbers 23, 23 to the size of each diaper 1. Manufacturing. About the process shown in these FIG.6 (d)-FIG.6 (f), the point which is not demonstrated in particular is the same as that of the manufacturing process of the conventional, what is called a vertical flow system deployment type disposable diaper.

  According to the manufacturing method of the diaper 1 of this embodiment mentioned above, the conveyance direction (y direction) of the continuous body of the absorptive main body 2 and the conveyance direction (y direction) when manufacturing the elastic waist panel 3 are the same. It is a direction, and it is not necessary to invert the elastic waist panel 3 90 degrees, and can reduce capital investment. Moreover, according to the manufacturing method of the diaper 1 of this embodiment mentioned above, the edge of the x direction outward side of each of the two sheets 5 and 6 constituting the stretchable waist panel 3 is aligned. Each thread-like elastic body 7 does not extend from the edge, and the diaper 1 having a good-looking stretchable waist panel 3 with aligned edges on the outer side in the x direction can be continuously produced. it can.

The manufacturing method of the elastic sheet of this invention is not restrict | limited to the above-mentioned embodiment at all, and can be changed suitably.
For example, in the manufacturing apparatus for the diaper 1 described above, the dividing means 21 is located on the downstream side of the elastic sheet forming portion 11A, and in the above-described embodiment, after the continuous body of the elastic sheet 30 is manufactured, In the dividing step, the continuous body of the elastic sheet 30 is cut using the dividing unit 21, but the dividing unit 21 is provided at the same position as the cutting unit 18, and the width direction (x Direction) The thread-like elastic body 7 extending from both ends is cut by using a cutter 180 to form a continuous body of the stretchable sheet 30, and at the same time, the width direction of the pair of belt-like sheets 50, 60 using the dividing means 21. You may cut | disconnect the center part (x direction) continuously.

  Moreover, in the above-described embodiment, each of the belt-like sheet 50 and the belt-like sheet 60 is folded in advance by a sailor (not shown) or the like, but may not be folded. Further, the inclination of the thread-like elastic body 7 is corrected in the direction orthogonal to the y-direction (x-direction), but is fixed to the pair of belt-like sheets 50 and 60 without being corrected at the angle wound around the conveyor belt 12. May be.

  Further, for example, only the thread-like elastic body 7 is cut in advance using a means such as pressing at the center cutting position, and then cut along the sheet conveying direction at the center in the width direction. Good. Thus, if the thread-like elastic body 7 is cut in advance, the appearance may be improved because the thread-like elastic body 7 does not exist in the seal portion 9.

  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, only one conveyor belt may be used. Moreover, you may use the thread | yarn support member provided with the screw groove described in FIGS. 4-6 of Unexamined-Japanese-Patent No. 2002-192641.

  Moreover, the manufacturing method of the absorbent article of the above-mentioned embodiment manufactures a pants-type disposable diaper and a pants-type sanitary napkin other than the deployment-type disposable diaper which has the elastic waist panel 3 shown in FIG. Can do. For example, in the case of a pants type, the elastic waist panel 3 is fixed to the abdominal side A instead of the panel material 4, and the cut edges 91 of the elastic waist panel 3 between the back side B and the abdominal side A Can be manufactured by joining.

DESCRIPTION OF SYMBOLS 1 Unfoldable disposable diaper 2 Absorbent main body 21 Top sheet 210 Band-shaped top sheet 22 Back sheet 220 Band-shaped back sheet 23 Absorbent body 24 Three-dimensional guard forming sheet 240 Three-dimensional three-dimensional guard forming sheet 25 Elastic member 3 Elastic waist Panel 30, 30a, 30b Stretchable sheet 3A Stretchable sheet 4 before the second step Panel material 5, 6 Sheet 50, 60 Band-shaped sheet 7 Threaded elastic body 70 Bobbin 8 Fastening tape 9 Seal part 91 Cutting edge 11A Stretchable sheet Forming part 11B Absorbent article (diaper) forming part 12 Conveying belt (conveying means)
12a Upper conveyor belt 121, 122 pulley 12b Lower conveyor belt 124, 125 Pulley 13 Conveyor belt (conveying means)
13a Upper conveyance belt 131,132 pulley 13b Lower conveyance belt 134,135 Pulley 14 Rotating arm (elastic body winding means)
141 Arm part 142 Shaft part 143 Circulating part 144 Connection part 145 Inlet 146 Outlet 15 Supply means 151 Tensor 152 Feed roller 153 Tension measuring instrument 156 Feed roller 17 Integration means 171, 172 Nip roller 18 Cutting means 180 Cutter 19 Adhesive Application means 191 Adhesive dispenser 20 Sealing means 201 Heat sealing roller 202 Receiving roller 203 Convex portion 21 Dividing means 211 Separating cutter roller 213 Cutter blade 212 Receiving roller 22 Position adjusting means 221 Position adjusting roller 23 Panel forming means 231 Cutter roller 233 Cutter Blade 232 Receiving roller 24 Waist panel joining means 242, 243 Pressing roller A Abdominal side, B Dorsal side, C Inseam

Claims (3)

An absorbent article manufacturing method for continuously manufacturing an absorbent article having stretchable waist panels extending from both side edges of a rectangular absorbent main body including an absorbent body,
The stretchable waist panel is formed of a stretchable sheet that is fixed in a state where a thread-like elastic body is stretched in a direction intersecting the transport direction of the beltlike sheet between a pair of beltlike sheets,
An elastic body winding means is used to wind the thread-like elastic body around the longitudinal structure for yarn conveyance, and the wound elastic body is conveyed by the longitudinal structure for yarn transportation and then sandwiched between the belt-like sheets. And a step of forming a stretchable sheet by cutting the thread-like elastic body extending from both ends in the width direction of the pair of belt-like sheets to form a continuous body of the stretchable sheet; A dividing step of continuously cutting the belt-like sheet along the sheet conveying direction at the center in the width direction, and a continuous of two elastic sheets obtained by the elastic sheet forming step and the dividing step. A pair of elastic waist panels in an individual state is formed by exchanging and cutting the positions of the body, and each cutting edge formed by the dividing step absorbs the pair of elastic waist panels. Joined to the continuous body of the constituent material of the absorbent main body so as to face outward in the width direction of the article and extend from both side edges of the absorbent main body of the absorbent article, and between adjacent absorbent bodies The absorbent article manufacturing method which has an absorbent article formation process which cut | disconnects into 2 pieces and manufactures the said absorbent article continuously. Upstream of the integration step, having an application step of applying an adhesive to the inner surface of one of the belt-like sheets or the other of the belt-like sheets;
In the coating step, a non-coating portion where the adhesive is not applied is continuously formed in the width direction of one of the belt-like sheets or the other belt-like sheet along the sheet conveyance direction, In the said division | segmentation process, the manufacturing method of the absorbent article of Claim 1 which cut | disconnects the said non-application part. After the integration step, there is a sealing step of sealing a pair of the belt-like sheets and continuously forming a seal portion along the sheet conveying direction,
In the said division | segmentation process, the manufacturing method of the absorbent article of Claim 1 or 2 which cut | disconnects the said seal part.

Images