JP2005270390A - Manufacturing method for opening/closing disposable underpants - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method easily forming a belt tab part to a front belt part forming belt conveyed along a line direction. <P>SOLUTION: This manufacturing method for opening/closing disposable pants which is worn with front belt parts wound around the waist of a wearer and a folded absorbent body locked in the front belly side includes; a step of conveying the front belt part forming belt 53 with its longitudinal direction along the line direction; a step of forming a cutting line 30 along its width direction to the conveyed front belt part forming belt; a step of mounting the belt tab part 42 which has a joining part 43 in its base end and a third hook material 42 capable of locking to or peeling from the front belt part in its tip part, on the front belt part forming belt 53 with their both sides disposed in both sides of the cutting line 30; and a step of joining the joining part 43 of the mounted belt tab part 42 to the front belt part forming belt 53. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing an openable disposable pants.

  As shown in FIG. 16, the back part 105, the front belt part 106 extending from the back part 105 to both sides in the width direction, and the absorbent main body 104 that can be folded back from the back part 105 to the front side of the wearer through the crotch. There are known openable disposable pants 100 that can be worn in a form in which the folded absorbent main body 104 and the front belt portion 106 wound around the waist of the wearer are fastened.

  When this type of disposable pants 100 is manufactured, as shown in FIG. 17, the belt 101 constituting the back portion 105 and the belt 102 constituting the front belt portion 106 can be conveyed in parallel along the line direction. It is common to manufacture with a simple manufacturing line.

  On this production line, first, the perforation 103 is formed in the band 102, and the absorbent main body 104 is placed in a posture straddling the band 101 and the band 102 on the downstream side. At this time, the absorbent main body 104 is detachably fixed to the upper surface of the band 102 in a state where the front portion thereof is disposed so as to straddle the perforation 103, and the rear portion is bonded to the upper surface of the band 101. Will be. Next, the absorbent main body 104 is folded in half so that the bands 101 and 102 are overlapped, and the bands 101 and 102 are sealed on both sides of the absorbent main body 104 by heat welding or the like, and cut, whereby the disposable pants 100 are Manufactured.

  When wearing the disposable pants 100 manufactured as described above, the wearer pulls up to the waist after passing both feet from the opening for the waist to the opening for the leg hole so as to wear the pants. And when taking off the disposable pants 100, a wearer cuts the perforation 103 of the front belt part 106 like FIG.16 (b) from a wearing form like Fig.16 (a), and also FIG.16 ( The absorbent main body 104 folded in half as shown in c) can be developed.

  On the other hand, as shown in FIG. 16C, when the disposable pants 100 once deployed are worn again, the wearer needs to wind the front belt portions 106 while tightening the front belt portions 106 around the waist. In order to make it easier to pull 106, it is required to extend and form a band picking portion 107 as shown in FIG.

  And according to said request | requirement, in the manufacturing method which conveys the belt | band | zone 102 along a line direction as shown in FIG. 17, and manufactures the disposable pants 100, the band picking part 107 is easy with respect to the belt | band | zone 102 currently conveyed. There is a demand for a method that can be formed in a simple manner.

  This invention is made | formed in view of the said subject, and provides the manufacturing method which can form a band picking part easily with respect to the front band part formation belt currently conveyed along the line direction. It is aimed.

  In order to solve the above problems, the present invention includes a back part, a front belt part extending from the back part to both sides in the width direction, and an absorbent main body that can be folded back from the back part to the front side of the wearer through the crotch. And a band picking part extending in the width direction from at least one front belt part, and the front belt part wound around the wearer's waist and the folded absorbent main body were fastened on the front side It is a manufacturing method of the opening-and-closing type disposable pants which can be worn as a form, Comprising: The front belt part formation belt conveyance process which conveys the front belt part formation belt so that the longitudinal direction may follow a line direction, and the front belt currently conveyed A cutting line forming step for forming a cutting line along the width direction of the part forming band, and a fastening part that has a joint part at the base end part and can be fastened and peeled off from the front belt part. The band picking part at the tip is placed in front so that both ends are arranged across the cutting line. A placing step for placing on the part forming band, a knob joining step for joining the joined part of the placed band picking part to the front band forming band, and a rear part so as to be parallel to the front band forming band. A back part forming band transporting process for transporting the back part forming band, and an absorptivity for joining the rear part of the absorbent main body to the back part forming band, while fixing the front part of the absorbent main body to the front band part forming band. Main body setting step, folding process of folding the absorbent main body in half so as to overlap the back formation zone and the front belt formation zone, and formation of the back portion overlapped at both side positions of the absorbent main body in the line direction A side sealing step for joining the belt and the front belt portion forming zone to partition the back portion and the front abdomen, and a front and back belt cutting step for cutting both the joined belts along the upstream joining portion. It is the method characterized by including.

  In the manufacturing method of the openable / closable disposable pants, the fastening portion is formed of a hook material of a mechanical fastener, and a loop material that joins a loop material capable of fastening and peeling the hook material onto a front belt portion forming belt. In the cutting line forming step, a cutting line is formed for the front band forming band and the loop material bonded thereto, and in the above placing step, the band picking portion is placed on the loop material. It is preferable that, in the picking part joining step, the joining part of the band picking part is joined to the loop material.

  It is preferable that the manufacturing method of the openable disposable pants further includes an attaching step of attaching an elastic member in a stretched state along the line direction with respect to the transported front belt portion forming belt.

  In the manufacturing method of the open-and-close type disposable pants, the knob part formation for conveying the knob part forming band having the fastening part and the joint part formed along the longitudinal direction on both sides in the width direction along the line direction. A band transporting process, a knob forming band cutting process for cutting the picked part forming band being conveyed along the width direction to form a band picking part, and a rotating process for rotating the cut band picking part by 90 ° It is preferable to place the rotated band picking part on the front band part forming band in the placing step described above.

  According to the present invention, a cutting line forming process, a placing process, and a knob connecting process are sequentially performed on the front band forming band that is being conveyed along the line direction, thereby developing along the cutting line. A possible front belt portion can be formed, and when the front belt portion is expanded, the distal end portion of the band picking portion whose base end portion is joined to the front belt portion extends from the front belt portion. It will be.

  And by using the front band forming band processed as described above, further performing the back portion forming band conveying process, the absorbent main body setting process, the folding process, the side seal process, and the front and rear band cutting process, An open / close-type disposable pants having a band picking part extending from the band part can be manufactured.

  Therefore, in the method of the present invention, the band picking portion can be formed by a relatively simple procedure such as sequentially performing the cutting line forming step, the placing step, and the tab portion bonding step with respect to the front band portion forming band. Therefore, the band picking part can be easily formed with respect to the front band part forming band conveyed along the line direction.

  According to the manufacturing method including the loop material joining process, the hook material of the mechanical fastener is formed on the band picking portion, while the loop material is joined to the front belt portion, and the front belt portions are fastened and peeled off by a simple method. Since the performance can be realized, the workability of the manufacturing operation of the openable disposable pants can be improved as compared with the method of applying the adhesive material to the band picking portion to form the fastening portion.

  According to the manufacturing method including the attachment step, since the elastic member is disposed along the circumference of the wearer in the front belt portion after the manufacturing, the front belt portion is placed on the front belly of the wearer during wearing. An open / close-type disposable pants having a good wearing feeling can be manufactured.

  According to the manufacturing method including the rotation process, the band picking part forming band is transported so as to be parallel to the front band part forming band in the pick part forming band transporting process, and the band picking part forming band is cut to cut the band picking part. Since this band picking part can be rotated in the rotation process and merged with the line of the front band forming band, the band picking part is manufactured along the line direction upstream from this joining point. be able to.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1A is a developed front view of the openable disposable pants 1, and the disposable pants 1 are configured by combining a pant main body 2 and an absorbent main body 3.

  6 (a) is a front view of the absorbent main body 3, FIG. 6 (b) is a cross-sectional view taken along the line AA in FIG. 6 (a), and FIG. 7 is a cross-sectional view taken along the line BB in FIG. FIG.

  The absorbent main body 3 includes a first absorbent body 6 and a second absorbent body 7 joined to the first absorbent body 6 by a joint portion 19 below the first absorbent body 6.

  In the first absorbent body 6, a first absorbent core 10 is sandwiched and bonded between a hydrophilic first top sheet 8 and a liquid-impervious or water-repellent first back sheet 9.

  The second absorbent body 7 is joined by sandwiching the second absorbent core 13 between the hydrophilic second top sheet 11 and the liquid-impervious or water-repellent second back sheet 12 on both the left and right sides. ing.

  A water repellent sheet 14 is joined to the outside of the second back sheet 12, and the water repellent sheet 14 and the second top sheet 11 are joined. The water repellent sheet 14 is for improving the touch, but the second back sheet 12 and the second top sheet 11 are extended by omitting the water repellent sheet 14 and extending the second back sheet 12. It is also possible to join.

  The first absorbent body 6 is formed in an hourglass shape, and the second absorbent body 7 is formed in an hourglass shape larger than the first absorbent body 6.

  The first absorbent core 10 of the first absorbent body 6 has an hourglass shape along the outer contour of the first absorbent body 6, but the second absorbent core 13 at the left and right side positions of the second absorbent body 7 has an inner edge at the first edge. The first absorbent core 10 is formed in an inwardly curved convex shape along the outer edge, and the outer edge is formed in an inwardly curved concave shape along the leg hole S of the second absorbent body 7.

  The first absorbent core 10 of the first absorbent body 6 is fitted between the left and right second absorbent cores 13 of the second absorbent body 7. In FIG. 6B and FIG. 7, the first absorbent core 10 is depicted as floating relative to the second absorbent core 13 in order to clarify the positional relationship between the materials. As shown in FIG. 8, the first absorbent core 10 and the second absorbent core 13 are substantially flat (substantially flat).

  It is preferable that a gap t (see FIG. 8: for example, 3 to 100 mm) is formed in a fitting portion between the outer edge of the first absorbent core 10 and the inner edge of the second absorbent core 13 of the first absorbent body 6. .

  The first absorbent body 6 is provided with a hydrophilic rising flap 15. The rising flap 15 rises from the left and right ends of the bottom portion 15a bonded to the lower surface of the first backsheet 9 along both side portions of the first absorbent body 6, and falls to a falling end portion 15b folded inward from the upper end. The elastic member 16 for rising is attached in the extended state in the length direction.

  The first top sheet 8 of the first absorbent body 6 has a side end portion 8a raised and joined to a falling end portion 15b of the rising flap 15, and a side end portion 9a of the first backsheet 9 is Raised and joined to the raised side end 8 a of the first top sheet 8.

  It is preferable that the side end portion 8a of the first top sheet 8 and the side end portion 9a of the first back sheet 9 rise at substantially the same height.

  Between the rising flap 15 of the first absorbent body 6 and the first back seat 9, rising supporting elastic members 17a and 17b are respectively attached in the stretched state in the length direction near the rising base and the rising middle. It is installed. The rise assisting elastic members 17 a and 17 b are for ensuring the rise of the rise flap 15, and in particular, the rise assisting elastic member 17 b near the middle portion is the inwardly curved concave portion of the first absorbent core 10. This contributes to ensuring the rise of the shape portion. The rise assisting elastic members 17a and 17b can be omitted.

  At both ends between the second top sheet 11 and the water-repellent sheet 14 of the second absorbent body 7, the leg elastic members 18 extend along the leg holes S and the outer edges of the second absorbent core 13. It is attached in a stretched state in the direction.

  The first absorbent body 6 and the second absorbent body 7 are set to have the same length in the front-rear direction, and as the absorbent main body 3, the length of the rear part 3b is set short and the length of the front part 3a is set long. The lengths of the absorbent cores 10 and 13 and the elastic members 16, 17a, 17b and 18 in the front-rear direction stop so as to stop near the front and rear end portions of the intermediate portion 3c between the front portion 3a and the rear portion 3b. Is set.

  The front and rear end portions 15c and 15d of the rising flap 15 of the first absorbent body 6 are within the range of the lengths of the front portion 3a and the rear portion 3b of the absorbent main body 3, and as shown in FIG. Are joined by the joint portion 24 in a posture lying down.

  A front waist elastic member 20 is attached to the front end side of the front portion 3a of the absorbent main body 3 between the second top sheet 11 and the water repellent sheet 14 of the second absorbent body 7 in a stretched state in the width direction. It is installed. In addition, the elastic member 20 for front waist (dimension D of FIG. 10) located in the part of the absorptive main body 3 which joins the 1st hook material 21 mentioned later performs a weakening process (cutting etc.), and its expansion-contraction force Does not reach the first hook material 21.

  As will be described in detail later, as shown in FIG. 9, the front waist elastic member 20 is attached to the elastic band 50 in a stretched state in the pants width direction. The elastic band 50 is attached along the pants width direction across the right front belt part P1, the absorbent main body 3, and the left front belt part P2 in the initial form to be described later, and corresponds to the both side positions of the absorbent main body 3. A pair of formed perforations 51 (one in FIG. 9) is provided. And the disposable pants 1 in the said initial form can expand | deploy the absorptive main body 3 from both front belt | band | zone parts P1 and P2 by breaking the elastic band 50 along the perforation 51. FIG.

  Furthermore, on both sides of the front end side of the front portion 3a of the absorbent main body 3 (both sides of the elastic member 20 for the front waist), the first hook material 21 of the mechanical fastener is attached to the second top sheet 11 of the second absorbent body 7. In addition to being joined, on both sides of the rear end side of the front portion 3a (both edges of the absorbent main body 3 constituting a leg opening S1 described later), the second top sheet 11 of the second absorbent body 7 and the repellent surface are repelled. A second hook member 23 of a mechanical fastener is joined to a tab 22 for picking which is sandwiched and attached between the aqueous sheet 14.

  Among the left and right knob tabs 22, the left knob tab 22 in FIG. 6A is folded inward, and the second hook material 23 is used as a second top sheet (nonwoven fabric to be a loop material) 11. The right pick tab 22 is folded outward and the second hook member 23 is not locked to the second top sheet 11. It is shown. As shown in FIG. 9A, the tab 22 for picking is in an unused state in which it is folded inward in an initial form to be described later.

  Here, with the mechanical fastener, when the hook part and the loop part make a pair and the two parts are strongly pressed, the hook part and the loop part are locked so that they are not easily detached from each other. When it is strongly peeled off by hand, the hook part and the loop part are disengaged. This is also called a hook-and-loop fastener.

  Moreover, since the nonwoven fabric sheet itself also has a function as a loop portion of the mechanical fastener, the loop portion can be omitted if a nonwoven fabric sheet is used instead of providing the loop portion. In addition, it may replace with a mechanical fastener and the adhesive which can be repeatedly latched and peeled may be sufficient.

  Next, the pant body 2 to which the absorbent body 3 is attached will be described.

  FIG. 1A is a developed front view of the openable disposable pants 1, and FIG. 1B is a developed front view of the pant body 2.

  The pant body 2 is configured by combining the front part P and the back part Q.

  1 (a) and 1 (b), the front abdomen P is separated into a right front belt part P1 and a left front belt part P2, but before the separation, the front abdomen P in FIGS. 2 and 4 (a). As shown in FIG. 4B, the perforated cutting lines 30 are integrally connected so that they can be separated by the cutting lines 30 when necessary. In the following, the front abdominal part P refers to the connected state before separation.

  1 and 4A, the front abdomen P is configured such that a front belt elastic member 33 is attached in an extended state in the width direction between the interior sheet 31 and the exterior sheet 32. The lower edge of the front abdomen P is formed as an arc-shaped notch edge 34a.

  With reference to FIGS. 1 and 4C, the rear back portion Q includes a rear waist elastic member 37 and a rear body fit elastic member 38 between the interior sheet 35 and the exterior sheet 36 in the width direction. The leg elastic member 39 is attached in an extended state so as to be connected to the leg elastic member 18 of the absorbent main body 3 along the arc-shaped notch edges 34b at the lower left and right sides. Has been configured.

  A plurality of the rear waist elastic members 37 are attached along the rear edge of the back portion Q at a relatively fine pitch, while the rear body fit elastic member 38 is more than the rear waist elastic member 37. A plurality of rear waist elastic members 37 are provided at a coarser pitch than the rear waist elastic member 37 on the front side (a position where the buttock is covered when worn). As a result, the rear waist elastic member 37 can exert a larger tension than the rear body fit elastic member 38. In addition to adjusting the number of elastic members as described above, it is possible to make a difference in tension between the elastic members 37 and 38 not only by adjusting the thickness or material of the elastic members.

  A part of the intermediate part 3c and the rear part 3b of the absorbent main body 3 are joined and assembled to the interior sheet 35 of the back part Q. Note that the rear body fit elastic member 38 and the leg elastic member 39 positioned at the back portion Q where the absorbent main body 3 is joined are subjected to weakening treatment, and the stretching force reaches the absorbent main body 3. It is preferable not to do so.

  As shown in FIG. 2, the front abdomen P and the back part Q are joined together by joining the left and right ends 34 c (side seals), and the front part P and the back part Q are integrated between the front part P and the back part Q. A waistline waist opening U (see FIG. 5) is formed in the body. Further, when the absorbent main body 3 is folded in half as shown in FIG. 3 (details will be described later), leg opening S1 (see FIG. 5) is formed on both sides between the back portion Q and the absorbent main body 3. In this case, the intermediate portion in the length direction of the absorbent main body 3 becomes the crotch portion R.

  A loop member 41 in the form of a horizontally long rectangular sheet is joined to the front surface of the exterior sheet 32 of the front abdomen P. The cutting line 30 is also formed in the loop member 41, and when the front abdomen P is separated into the right front belt part P1 and the left front belt part P2, they are cut off simultaneously.

  In front of the loop member 41, a band picking portion 42 is disposed across the cutting line 30, and a base end portion of the band picking portion 42 is joined to the right front belt portion P1 by a joining portion 43, and a distal end. A third hook member 44 of a mechanical fastener is joined to the part.

  The third hook member 44 is locked to the loop member 41 before the front abdomen P is cut off (see FIG. 4A), and is cut off from the front abdomen P (FIG. 4B). Reference], the band picking portion 42 is picked and peeled off from the loop material 41.

  When the absorbent main body 3 is folded in two from the state of FIG. 2 as shown in FIG. 3, the first hook members 21 on both sides of the front portion 3 a of the absorbent main body 3 are locked to the loop member 41 to absorb the absorbent body. The main body 3 is held in a folded state (fixed).

  When the disposable pants 1 are manufactured, the pants body 2 and the absorbent body 3 are assembled in a state (initial form) as shown in FIG. In this initial form, the absorptive main body 3 and both front belt portions P1 and P2 are joined by temporary welding portions K on both sides in the width direction of the absorptive main body 3. The temporary welded portion K is formed by heat welding or the like, and joins the absorbent main body 3 and both front belt portions P1, P2 in a peelable manner. The temporarily welded absorbent main body 3 and both front belt portions P1 are joined. , P2, the tab 22 for picking is folded in half and accommodated as shown in FIG.

  When the wearer wears the disposable pants 1 (when the caregiver wears the disposable pants 1), the left and right legs are passed through the leg opening S1 from the waist opening U, and the front abdomen P is on the ventral side and the back. When the disposable pants 1 are pulled up so that Q is on the back side, the front abdominal part P and the back part Q are fitted around the wearer's waist by the contraction force of the elastic members 20, 33, 37, 38, and the leg opening is opened. S1 comes to fit around a wearer's leg with the contraction force of each elastic member 18,39. Further, the crotch portion R of the absorbent main body 3 is adapted to fit around the wearer's crotch together with the rising flap 15 that has risen.

  Then, when the wearer takes off the disposable pants 1 (when the caregiver can take off the disposable pants 1), the disposable pants 1 may be pulled down and the left and right legs may be pulled out from the leg opening S1.

  The disposable pants 1 can be worn as follows.

  That is, for the disposable pants 1 in the initial form shown in FIG. 3, the temporary welded portion K is peeled off, and the first hook material 21 of the absorbent main body 3 is peeled off from the loop material 41 of the front abdomen P, as shown in FIG. In addition, the absorbent main body 3 is set in a developed state. Next, as shown in FIGS. 4 (a) and 4 (b), the banding portion 42 of the front abdomen P is picked, the third hook material 44 is peeled off from the loop material 41, and the front abdomen P is cut along the cutting line 30. The right front belt part P1 and the left front belt part P2 are divided, and the right front belt part P1 and the left front belt part P2 are developed as shown in FIG.

  In this state, while turning the back portion Q on the wearer's back side, turning the right front belt portion P1 and the left front belt portion P2 on the wearer's abdomen, and picking the band picking portion 42 of the right front belt portion P1, The third hook member 44 is engaged with the loop member 41 of the left front belt part P2. Thereby, the front part P and the back part Q come to fit a wearer's waist circumference.

  Next, the first hook material 21 of the absorbent main body 3 is engaged with the loop material 41 of the right front belt portion P1 and the left front belt portion P2 while the absorbent main body 3 is passed through the inseam of the wearer and folded in two. Stop. Thereby, the absorptive main body 3 is hold | maintained in a 2-fold state, and comes to fit a wearer's crotch periphery.

  At this time, the hook material 23 is peeled off from the second top sheet (nonwoven fabric to be a loop material) 11 of the second absorbent body 7 and the tab 22 for pulling is pulled rearward while the right front belt portion P1 and the left front belt portion P2 are covered. (Nonwoven fabric to be a loop material) 32. Thereby, leg opening S1 is restrict | squeezed and it comes to fit more with respect to a wearer's leg periphery.

  When the wearer takes off the disposable pants 1 (when the caregiver wears the disposable pants 1), the above procedure is reversed, that is, the tabs 22 on both sides of the front part 3a of the absorbent main body 3 are picked, The second hook material 23 is peeled off from the second top sheet (nonwoven fabric to be a loop material) 11 of the second absorbent body 7, and the first hook material 21 of the absorbent main body 3 is looped between the right front belt portion P1 and the left front belt portion P2. The right front belt part P1 and the left front belt part P2 may be developed by peeling from the material 41.

  Hereinafter, a method for manufacturing the openable disposable pants 1 will be described.

  FIG. 10 is a plan view in which a part of the production line of the openable disposable pants 1 is omitted.

  Referring to FIG. 10, in the production line for disposable pants 1, rear part forming band 52 is conveyed along the line direction (rear part forming band conveying step) so that the processing is sequentially advanced along main line PH. It has become.

  Specifically, in the main line PH, an attachment section X1, a joining section X2, a placing section X3, an attaching section X4, a folding section X5, a side seal section X6, and a cut section X7 are set in order from the upstream side. Yes.

  In the attachment section X1, as shown in FIG. 11, the exterior sheet 36 and the interior sheet 35 are conveyed from below along the line direction, and between the sheets 35, 36, the rear A waist elastic member 37, a rear body fit elastic member 38, and a leg elastic member 39 are provided along the line direction.

  Further, in the attachment section X1, after the elastic members 37 to 39 are attached, the edge portion of the exterior sheet 36 is folded upward and joined to the interior sheet 35. The body fitting elastic member 38 and leg elastic member 39 are subjected to a weakening process for a portion where the absorbent main body 3 is to be placed later in the attachment section X1.

  The additional section may be set on the downstream side of the mounting section X3 described later in the main line PH.

  In the joint section X2, the absorbent main body 3 manufactured and conveyed along the line direction is rotated by 90 °, and the rear portion 3b of the absorbent main body 3 is set at a predetermined pitch at the back portion forming band 52. The absorbent main body 3 and the back portion forming band 52 are joined to each other.

  In the placement section X3 described above, the front band portion forming band 53 is placed on the front portion 3a of the absorbent main body 3 so as to cover the first hook material 21 of the absorbent main body 3 (FIG. 15 (a )reference). And the front belt | band | zone part formation band 53 mounted on the absorptive main body 3 will be conveyed downstream along the line direction so that it may be parallel to the said back part formation band 52.

  In addition, the process performed by the said joining section X2 and the mounting section X3 is an absorptive main body setting process in this embodiment.

  The front band portion forming band 53 is introduced into the placement section X3 after being subjected to pre-processing as shown in FIG. 12 (a). In the above pre-processing, the interior sheet 31 and the exterior sheet 32 are conveyed from the bottom along the line direction (front band forming band conveyance process). The band elastic member 33 is attached in an extended state along the line direction (attachment step). Next, the loop material 41 is placed on the exterior sheet 32 at a preset pitch, and both are joined (loop material joining step).

  A cutting line 30 is formed along the band width direction at the substantially longitudinal center position of the loop material 41 with respect to the front band forming band 53 and the loop material 41 joined in this way (cutting line forming step). The band picking portion 42 is placed on the exterior sheet 32 so as to straddle the cutting line 30 (placement step).

  The band picking part 42 conveys the knob part forming band 54 in which the joint part 43 and the third hook material 44 are formed along the longitudinal direction on both sides in the width direction along the line direction (pick part forming band conveyance). Step), the knob portion forming band is cut in the width direction (a knob portion forming band cutting step). Then, after the cut band picking portion 42 is rotated by 90 ° (rotating step), in the above placing step, the joint portion 43 is upstream of the cutting line 30 and the third hook member 44 is downstream of the cutting line 30. It mounts on the exterior | packing sheet 32 so that it may become, and the junction part 43 of the band picking part 42 is joined with respect to the loop material 41 (pinch part joining process).

  Next, an arc-shaped notch 55 that penetrates in the thickness direction with respect to the front band portion forming band 53 and opens to the front side (width direction) of the band picking portion 42 so that the cutting line 30 is at the apex position. Form. In the front band portion forming band 53, the tension of the front band elastic member 33 is A <B in the band width dimension A in which the arc-shaped cutout 55 is formed and the band width dimension B in which the arc-shaped notch 55 is not formed. Is set to Thereby, in a state where no external force is applied, the arc-shaped notch 55 of the front band portion forming band 53 is prevented from fluttering.

  The front band forming band 53 having been subjected to such pre-processing is introduced into the placement section X3 after being turned upside down. In the above placement step, the arc-shaped notch 55 opens to the back portion forming band 52 side, and the arc-shaped notch 55 is positioned so as to be disposed immediately above the absorbent main body 3. The front band forming band 53 is placed on the absorbent main body 3.

  In addition, the said pre-processing can also be made like FIG.12 (b), for example. That is, the knob portion forming band 57 having a double width dimension with respect to the knob portion forming band 54 is placed on the front band portion forming band 56 having a double width dimension with respect to the width direction of both the front band portions P1 and P2. Then, arc-shaped notches 55 are formed on both sides in the width direction of the knob portion forming band 57, and this is cut in half in the width direction by a cutter 58, whereby two front band forming bands 53 are simultaneously manufactured. It is also possible.

  With reference to FIGS. 9 and 10, in the sticking section X <b> 4, the elastic band 50 is stuck to the absorbent main body 3 in order to add the front waist elastic member 20 to the absorbent main body 3. . Specifically, in the attaching section X4, the elastic member 20 for the front waist attached at every interval C is disposed between the first hook members 21 on both sides in the pants width direction and below the absorbent main body 3. As described above, the elastic band 50 is arranged below the absorbent main body 3 (see FIG. 15B), and the elastic band 50, the absorbent main body 3 and the front band portion forming band 53 are adhered.

  More specifically, as shown in FIG. 14, the elastic band 50 has joints 59, 60 along the longitudinal direction with a perforation 51 (see FIG. 9) formed at an interval E as a boundary. It is formed alternately. And in the said adhesion | attachment section X4, while the junction part 59 is joined to the water-repellent sheet 14 of the absorptive main body 3, the junction part 60 is joined to the front belt | band | zone part formation band 53 (the exterior sheet 32 and the loop material 41). Will be. 14 shows a state in which the absorbent main body 3 and the front band portion forming band 53 are separated from each other, but in actuality, both are fixed by the first hook material 21 and the loop material 41. Yes.

  The elastic band 50 is introduced into the sticking section X4 after pre-processing as shown in FIG. In the pre-processing, the exterior sheet 61 and the interior sheet 62 are conveyed from below along the line direction as shown in FIG. A waist elastic member 20 is attached. Next, as shown in FIG. 13A, the weakening process of the front waist elastic member 20 is intermittently performed at intervals D within the interval C. Thereafter, a gap E having a central position similar to the gap C is opened, and perforations 51 are sequentially formed in the elastic band 50, and the elastic band 50 is introduced into the sticking section X4.

  Referring to FIG. 10 again, in the folded section X5, the absorbent main body 3 is folded in two so that the front band forming band 53 and the back portion forming band 52 are overlapped (folding process), and in the side seal section X6, At the positions on both sides of the absorbent main body 3 in the line direction, the overlapped back portion forming band 52 and the front band portion forming band 53 are joined to define the front abdomen P and the back portion Q (see FIG. 3) (side). Sealing process).

  Then, the back portion forming band 52, the front band forming band 56, and the elastic band 50 are cut in the cutting section X7 along the upstream side of the both end portions 34c formed in the side sealing step (front and rear). The openable disposable pants 1 are manufactured by the band cutting step.

  As shown in FIG. 10, the interval C in the elastic band 50 corresponds to the interval between the front waist elastic members 20 of the disposable pants 1 adjacent in the production line, and the interval D is the front waist elastic member 20. The distance E is set corresponding to the width direction of the front portion 3a of the absorbent main body 3.

  Moreover, in the said embodiment, while joining the rear part 3b of the absorptive main body 3 on the back part formation band 52 like FIG.15 (b), it is a front band part formation band on the front part 3a of the absorptive main body 3. FIG. 53, but is not limited to this, as shown in FIG. 15 (c), the back formation zone 52 and the front formation zone 53 are arranged on the same plane, While joining the rear part 3b of the absorptive main body 3 on the back part formation band 52, you may make it fix the front part 3a of the absorptive main body 3 on the front band part formation band 53. FIG. At this time, the elastic band 50 is bonded onto the front band forming band 53 and the absorbent main body 3.

  As described above, according to the manufacturing method of the present embodiment, the cutting line forming process, the placing process, and the knob joining process are sequentially performed on the front band forming band 53 that is conveyed along the line direction. By executing, it is possible to form the right front belt part P1 and the left front belt part P2 that can be developed along the cutting line 30, and when both the front belt parts P1 and P2 are developed, the base end part is located on the right front side. The tip of the band picking part 42 joined to the band part P1 extends from the right front band part P1.

  And by using the front band forming band 53 processed as described above, by further performing the back part forming band conveyance process, the absorbent main body setting process, the folding process, the side seal process, the front and rear band cutting process, The open / close-type disposable pants 1 having the band picking part 42 extending from the right front belt part P1 can be manufactured.

  Therefore, in the above manufacturing method, the band picking portion 42 can be formed by a relatively simple procedure of sequentially executing the cutting line forming step, the placing step, and the pick portion joining step with respect to the front band portion forming band 53. Therefore, the band picking part 42 can be easily formed with respect to the front band part forming band 53 conveyed along the line direction.

  According to the manufacturing method including the loop material joining process, the third hook material 44 is formed on the band picking portion 42 while the loop material 41 is joined to both the front belt portions P1 and P2 by a simple method. Since the fastening / peeling performance of the parts P1 and P2 can be realized, it is an open / close disposable compared to the case where the adhesive material is applied to the band picking part 42 and the front belt parts P1 and P2 are fastened. The workability of the manufacturing work of the pants 1 can be improved.

  According to the manufacturing method including the attachment step, the front belt elastic members 33 are disposed along the circumference of the wearer in the front belt portions P1 and P2 after the manufacturing. The open / close-type disposable pants 1 with good wearing feeling in which the belt portions P1 and P2 fit the wearer's front abdomen can be manufactured.

  According to the manufacturing method including the rotation process, the band picking part forming band 54 is transported so as to be parallel to the front band forming band 53 in the knob part forming band transporting process, and the band picking part forming band 54 is cut and banded. Since the picking part 42 is formed, and the band picking part 42 is rotated in the rotation process and can be joined to the line of the front band part forming band 53, the band picking part 42 is arranged on the upstream side of the joining point. It can be manufactured along the line direction.

  Hereinafter, the constituent materials of each of the above members will be briefly described.

[First Top Sheet 8, Second Top Sheet 11]
A hydrophilic (liquid permeable) nonwoven material is preferred. For example, non-woven materials using hydrophilic fibers (cellulose, rayon, cotton, etc.) or non-woven materials made hydrophobic by treating the surface of hydrophobic fibers (polypropylene, polyester, polyamide, nylon, etc.) with a surfactant. Is used. Preferably, it is a liquid-permeable nonwoven fabric material (point bond nonwoven fabric, air-through nonwoven fabric) having a basis weight of 10 to 35 g / m ² which is treated with a surfactant to make the hydrophobic fiber back surface liquid-permeable.

[First Back Sheet 9, Second Back Sheet 12]
Water repellent nonwoven material (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.), plastic film (which may be breathable or non-breathable, but is preferably a breathable plastic film) and its Composite materials are used. A breathable polyethylene film having a basis weight of 15 to 50 g / m ² is preferable.

[First Absorption Core 10, Second Absorption Core 13]
An absorbent core obtained by mixing a granular polymer water-absorbing body with a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber is wrapped in a paper sheet such as tissue paper or a covering sheet such as a liquid-permeable nonwoven sheet, Absorber molded into a shape (rectangular, hourglass, gourd, etc.). A sheet-like absorbent body (for example, an air-laid absorbent body) obtained by forming the fiber or the polymer water-absorbing body into a sheet shape may be formed into a predetermined shape and used. In order to maintain the shape even when the wearer walks or rolls over, shape retention means (application of hot melt adhesive, mixing of synthetic fibers) is applied to the hydrophilic fiber aggregate layer or sheet. It doesn't matter.

[Water repellent sheet 14]
When a plastic film is used for the second back sheet 12, it is for improving the touch, and a water-repellent nonwoven material (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.) is preferable.

[Rising flap 15]
In the case of hydrophilicity, the same nonwoven fabric material as the first and second top sheets 8 and 11 is preferable. In the case of water repellency, the same nonwoven material as the first and second backsheets 9 and 12 is preferable.

[Elastic members 16, 17a, 17b, 18, 20, 33, 37, 38, 39]
Elastic elastic materials (polyurethane yarn, polyurethane film, natural rubber, etc.) that are usually used for disposable diapers are used, and are attached by suitable attachment means such as hot melt adhesive, thermal bonding, ultrasonic bonding, and the like. A rubber-based hot melt adhesive is preferable. Further, it is preferable to attach a polyurethane yarn having a fineness of 300 to 2000 dtex to a magnification of 1.1 to 5.0.

[Interior sheet 31]
Water repellent nonwoven materials (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.) are used. Preferably, it is a water-repellent nonwoven material having a basis weight of 10 to 35 g / m ² . Alternatively, only the inner surface may be hydrophilized (surfactant is applied or a layer of hydrophilic fibers (rayon, cotton, etc.) is formed. In this case, the touch when touching the skin is improved. Also, sweat absorption effect can be expected.

[Exterior sheet 32]
A breathable water-repellent nonwoven material (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.) is used. Preferably, it is a water-repellent nonwoven material having a basis weight of 10 to 35 g / m ² .

[Bonding of each sheet material]
For joining the above sheet materials, methods such as hot melt adhesive, thermal joining, ultrasonic sealing and the like are appropriately used. For hot melt adhesives, select from hot melt adhesives such as rubber, polyolefin, vinyl acetate, etc., direct coater coating, indirect spiral coating, melt blow (curtain spray) coating, bead coating. Apply by the method. Note that thermal bonding is preferable for bonding the side seals.

(A) is an expansion | deployment front view of opening-and-closing type disposable pants, (b) is an expansion | deployment front view of a pants main body. It is a front view before the front abdominal part of opening-and-closing disposable pants is cut | disconnected by the right front belt part and the left front belt part. It is a front view of the state which folded and absorbed the absorptive main body of the opening-and-closing type disposable pants. (A) is sectional drawing before cutting | disconnection of the cutting line part of a front abdominal part, (b) Cross sectional view after cutting | disconnection of the cutting line part of a front abdominal part, (c) is sectional drawing of a back part. It is an assembly side view of opening-and-closing type disposable pants. (A) is a front view of an absorptive main body, (b) is the sectional view on the AA line of (a). It is the BB sectional view taken on the line of Fig.6 (a). It is sectional drawing which shows the up-and-down positional relationship of a 1st absorption core and a 2nd absorption core. It is a front view which expands and shows a part of disposable pants of an initial form. It is a top view which abbreviate | omits and shows a part of manufacturing line of opening-and-closing type disposable pants. It is the FF sectional view taken on the line of FIG. It is a top view which shows the process of the pre-process of a front belt part formation belt, and when (a) uses the front belt part formation belt same as the width direction of a front belt part, (b) is double to a front belt part. The case where the front band part formation band which has a width dimension is used is shown, respectively. (A) is a top view which shows the process of the pre-processing of an elastic belt, (b) is the JJ sectional view taken on the line of (a). It is the II sectional view taken on the line of FIG. 10A is a cross-sectional view taken along line GG in FIG. 10, FIG. 10B is a cross-sectional view taken along line H-H in FIG. 10, and FIG. 10C is a cross-sectional view corresponding to a cross-sectional view taken along line H-H according to the manufacturing method of another embodiment. FIG. It is a top view which shows typically the opening-and-closing type disposable pants which can be worn with the form which fixed the front belt part and the absorptive absorptive main part, (a) is a wearing form, and (b) develops the front belt part. (C) shows the form which developed the absorptive main part, (d) has shown the wearing form of the disposable pants provided with the band picking part, respectively. It is a top view which shows typically the manufacturing method of the disposable pants shown to Fig.16 (a)-(c).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disposable pants 3 Absorbent main body 3a Front part 3b Rear part 30 Cutting line 33 Elastic member for front belts 34c Both ends 41 Loop material 42 Band picking part 43 Joint part 44 Third hook material 52 Rear back part formation band 53 Front belt part formation band P1, P2 Front belt part Q Rear back part

Claims (4)

A back belt, a front belt extending from the back back to both sides in the width direction, an absorptive main body that can be folded from the back back through the crotch to the front side of the wearer, and the width direction from at least one front belt Of the openable disposable pants that can be worn as a form in which the front belt part wound around the waist of the wearer and the folded absorbent main body are fastened on the front abdomen side A method,
A front band forming band conveying step for conveying the front band forming band so that its longitudinal direction is along the line direction;
A cutting line forming step for forming a cutting line along the width direction of the front band forming band being conveyed,
A band picking portion having a joining portion at the base end portion and a fastening portion that can be fastened and peeled off from the front belt portion at the distal end portion, so that both end portions are arranged across the cutting line, A placing step of placing on the front belt forming zone;
A knob joining process for joining the joint of the band picker that is mounted to the front band forming band,
A back part forming band transporting step for transporting the back part forming band in parallel with the front band part forming band;
While joining the rear part of the absorbent main body to the back forming zone, the absorbent main body setting step of fixing the front part of the absorbent main body to the front belt forming zone,
A folding step of folding the absorbent main body in half so as to overlap the back portion forming band and the front portion forming band;
A side seal step for joining the overlapped back portion forming band and the front band portion forming band at both side positions of the absorbent main body in the line direction to partition the back portion and the front abdomen,
The manufacturing method of the open-and-close-type disposable pants characterized by including the back-and-front band cutting process cut | judging the joined both bands along the upstream joining part.   2. The method for manufacturing an openable / closable disposable pant according to claim 1, wherein the fastening portion is made of a hook material of a mechanical fastener, and a loop material capable of fastening and peeling the hook material is placed on the front belt portion forming belt. A loop material joining step for joining to the front portion, forming a cutting line for the front band portion forming band and the loop material joined thereto in the cutting line forming step, and in the placing step, the band picking portion Is mounted on the loop material, and in the knob part joining step, the joint part of the band knob part is joined to the loop material.   The manufacturing method of the openable / closable disposable pants according to claim 1 or 2, wherein an attaching step of attaching an elastic member in a stretched state along the line direction with respect to the transported front belt portion forming belt. Furthermore, the manufacturing method of the opening-and-closing type disposable pants characterized by including.   In the manufacturing method of the opening-and-closing type disposable pants in any one of Claims 1 thru | or 3, The knob | pick part formation belt | band | zone which has the said fastening part and junction part formed along the longitudinal direction on both sides of the width direction is provided. A cutting part forming band conveying step for conveying along the line direction, and a knob forming band cutting process for cutting the conveyed knob forming band along the width direction to form a banding part. A rotating step of rotating the band picking part by 90 °, and placing the rotated band picking part on the front band forming band in the placing step described above. .

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