JP4163133B2 - Manufacturing method of openable disposable pants - Google Patents

Description

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

  Generally, it has 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 is folded back. Open / close-type disposable pants that can be worn in a form in which a main body and a front belt portion wound around a waist of a wearer are fastened are known.

  In this type of disposable pants, the front part of the absorbent main body is fixed to the front abdomen side of the wearer at the time of wearing, so in order to fit the absorbent main body to the front abdomen, The front waist elastic member is attached along the pants width direction.

  When manufacturing the disposable pants as described above, as shown in FIG. 16, a production line capable of conveying the belt 101 constituting the back portion and the belt 102 constituting the front belt portion in parallel along the line direction. It is common to manufacture with.

  On this production line, first, the perforation 103 is formed in the band 102, and on the downstream side, the absorbent main body 104 in which the front waist elastic member 105 is attached to the front part 104 a is straddled between the band 101 and the band 102. Place it in the correct posture. At this time, the absorbent main body 104 is detachably fastened to the upper surface of the band 102 in a state where the front portion 104a is arranged so as to straddle the perforation 103, and the rear portion 104b is fixed to the upper surface of the band 101. Will be joined. Next, the absorbent main body 104 is folded in two so that the bands 101 and 102 are overlapped, and the bands 101 and 102 are sealed by heat welding or the like on both sides of the absorbent main body 104 to cut, thereby producing disposable pants. Is done.

  However, in the above manufacturing method, the absorbent main body 104 to which the front waist elastic member 105 is attached is fixed on the band 102. Therefore, when performing this fixing operation, the front waist elastic member is used. While extending 105, it is necessary to fix the absorbent main body 104 to the belt 102, not only the workability is bad, but also the width dimension of the absorbent main body 104 changes according to the expansion and contraction of the elastic member 105 for the front waist. Therefore, it is difficult to accurately position the absorbent main body 104 with respect to the band 102.

  The present invention has been made in view of the above problems, and is an open / close-type disposable pant that can accurately perform the fixing operation of the absorbent main body with respect to the front band portion forming band and can improve workability. The object is to provide a manufacturing method.

  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. A front waist elastic member provided at a front portion of the absorbent main body and attached in a stretched state along the width direction, and folded with a front belt portion wound around a wearer's waist A method for manufacturing an openable disposable pants that can be worn as a form in which an absorbent main body is fastened on the front side, and conveys a back portion forming band and a front portion forming band in parallel along the line direction. A front and rear belt transporting step, and an absorptive main body setting step of joining the rear portion of the absorbent main body to the rear back portion forming belt being transported and fixing the front portion of the absorbent main body to the front belt portion forming belt; The elastic member for the front waist is stretched along the longitudinal direction. The elastic band is moved along the width direction with respect to the elastic band at an interval corresponding to the width dimension of the front part of the absorbent main body, and the elastic band conveying step for conveying the installed elastic band so that the longitudinal direction thereof is along the line direction. The elastic band is arranged so that the front part of the absorbent main body is sandwiched between the perforation forming step for forming the perforation and the front band part forming band, and the front part of the absorbent main body is disposed between each of the perforations. In the positioned state, the absorbent main body is folded in two so that the elastic band is joined to the front and front band forming bands of the absorbent main body, and the back forming band and the front band forming band are overlapped. And a side sealing step for joining the overlapped back portion forming band and the front band portion forming band at the both side positions of the absorbent main body in the line direction to partition the back portion and the front abdomen, and upstream Joined back formation along side joints And a method which is characterized in that it contains a longitudinal strip cutting step of cutting the front belt portion forming zone and an elastic band joined to both these bands.

  In the manufacturing method of the openable disposable pants, it is preferable to further include a weakening step of weakening the expansion and contraction force of the elastic member for the front waist at least in the range of the elastic band to be joined to the front band forming band. .

  The present invention also includes a back part, a front belt part extending from the back part to both sides in the width direction, an absorbent main body that can be folded back from the back part to the front side of the wearer through the crotch, and the absorbent main body. A front waist elastic member provided in a stretched state along the width direction, and a front belt portion wound around the wearer's waist and a folded absorbent main body. It is a manufacturing method of an openable and disposable disposable pants that can be worn as a form fastened on the front side, and a front and rear belt transporting step for transporting the back portion forming belt and the front belt portion forming belt in parallel along the line direction; An absorptive main body setting step for joining the rear part of the absorbent main body to the rear back forming band being conveyed, and fixing the front part of the absorbent main body to the front band forming band, and elasticity for the front waist When the member is attached in a stretched state along the longitudinal direction In addition, an elastic band piece adjusted in accordance with the width of the front part of the absorbent main body is arranged so that the front part of the absorbent main body is sandwiched between the front band part forming band and the absorbent main body. The joining process for joining the front part, the folding process for folding the absorbent main body in half so as to overlap the back part forming band and the front part forming band, and the both sides of the absorbent main body in the line direction Before and after cutting the joined belts along the upstream joining points, joining the rear and back belt forming zones together, and separating the back and front abdomen. And a band cutting step.

  According to the present invention, since the elastic band is bonded to the front part and the front band part forming band of the absorbent main body in the bonding process, the absorbent main body is attached to the back part forming band and the absorbent main body setting process. After setting with respect to the front band part formation band, the elastic member for front waist can be provided with respect to the said absorptive main body.

  Therefore, in this invention, since an absorptive main body can be positioned with respect to a back part formation belt | band | zone and a front belt | band | zone part formation belt | band | zone before provision of the elastic member for front waists, the fastening operation | work of an absorptive main body is performed correctly. As a result, it is not necessary to position the absorbent main body while extending it, so that workability can be improved.

  In the present invention, an elastic band is applied to both the front part and the front band part forming band of the absorbent main body, but since the perforation is formed in the elastic band, the manufacturing method of the present invention When using the disposable pants manufactured in (1), the absorbent main body can be peeled off from the front band portion by breaking the elastic band along the perforation.

  According to the manufacturing method of the open-and-close type disposable pants including the weakening step, it is possible to eliminate the expansion and contraction force of the elastic member for the front waist by the elastic band with respect to the front band part forming band. The expansion / contraction force can be applied with certainty.

  In another manufacturing method of the present invention, since the elastic strip is joined to the front part of the absorbent main body in the joining step, the absorbent main body is attached to the back portion forming band and the front part in the absorbent main body setting step. After setting with respect to a belt | band | zone part formation belt, the elastic member for front waists can be provided with respect to the said absorptive main body.

  Therefore, in this manufacturing method, the absorbent main body can be positioned with respect to the back portion forming band and the front band portion forming band before application of the elastic band piece, so that the fixing operation of the absorbent main body is accurately performed. As a result, it is not necessary to position the absorbent main body while extending it, so that workability can be improved.

  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. 9A, 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. 9A) 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 strongly press both, the hook part and the loop part are locked so that they are not easily detached from each other, and the hook part and the loop part 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 fitting 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 and 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, the processing is sequentially advanced along main line PH that conveys back portion forming band 52 along the line direction.

  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-fit elastic member 38 and the leg elastic member 39 are subjected to a weakening process for a portion where the absorbent main body 3 is 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 forming band 53 conveyed along the line direction so as to be parallel to the back portion forming band 52 (front and rear band conveying step) is used as the first hook member of the absorbent main body 3. 15 is placed on the front portion 3a of the absorbent main body 3 so as to cover the absorbent body 3 (see FIG. 15A), and both are fastened by the first hook material 21.

  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 below along the line direction. First, the front belt elastic member 33 is disposed between the sheets 31 and 32 in the line direction. Attached in an extended state along. Next, the loop material 41 is placed on the exterior sheet 32 at a preset pitch, and both are joined.

  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, and straddles the cutting line 30. The band picking part 42 is placed on the exterior sheet 32.

  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. Is cut in the width direction. Then, after the cut band picking portion 42 is rotated by 90 °, in the above placing step, the joining portion 43 is on the upstream side of the cutting line 30 and the third hook member 44 is on the downstream side of the cutting line 30. It is placed on the exterior sheet 32 and the joining portion 43 of the band picking portion 42 is joined to the loop material 41.

  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 FIG. 9A and FIG. 10, in the sticking section X <b> 4, the elastic band 50 is attached to the absorbent main body 3 in order to add the front waist elastic member 20 to the absorbent main body 3. Join. Specifically, in the attaching section X4, the elastic member 20 for the front waist attached at every interval C is between the first hook members 21 on both sides in the width direction of the pants and below the front portion 3a of the absorbent main body 3. The elastic band 50 is disposed below the absorbent main body 3 (see FIG. 15B), and the elastic band 50, the front portion 3a of the absorbent main body 3 and the front band portion forming band 53 are arranged. Are joined (joining step).

  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, as shown in FIG. 13B, the exterior sheet 61 and the interior sheet 62 are conveyed from the bottom along the line direction (elastic band conveyance process). A front waist elastic member 20 is attached between 61 and 62. Next, as shown in FIG. 13A, the weakening process (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 (perforation forming step), and the elastic band 50 is introduced into the attaching section X4. To do.

  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.

  Furthermore, in the sticking section X4 in the above embodiment, the elastic band 50 is joined to the front part 3a of the absorbent main body 3 and the front band part forming band 53, but is not limited thereto. As shown in FIG. 9 (b), the elastic strip 50a adjusted in accordance with the width dimension of the front portion 3a of the absorbent main body 3 is joined to the front portion 3a of the absorbent main body 3 (another implementation). The form joining step) may be performed. This elastic band piece 50a is formed by attaching the front waist elastic member 20 along the longitudinal direction in a stretched state, and the front waist elastic member 20 is formed of each first hook member 21 in the pants width direction. It is preferable that a weakening process is performed on the outer position.

  As described above, according to the manufacturing method of the present embodiment, since the elastic band 50 is bonded to the front portion 3a and the front band forming band of the absorbent main body 3 in the bonding step, the absorbency After the absorbent main body 3 is set to the back portion forming band 52 and the front band portion forming band 53 in the main body setting step, the front waist elastic member 20 can be applied to the absorbent main body 3.

  Therefore, in this invention, since the absorptive main body 3 can be positioned with respect to the back part formation band 52 and the front band part formation band 53 before provision of the elastic member 20 for front waists, attachment of the absorptive main body 3 is fixed. The work can be performed accurately, and the workability can be improved as a result of eliminating the need to position the absorbent main body 3 while extending it.

  According to the manufacturing method including the weakening step, the elastic force of the elastic member 20 for the front waist by the elastic band 50 can be prevented from reaching the front band forming band 53. The expansion / contraction force can be applied with certainty.

  Moreover, according to the manufacturing method which joins the elastic strip 50a with the sticking section X4, since the elastic band change 50a is joined to the front part 3a of the absorptive main body 3 in a joining process, an absorptive main body set After the absorbent main body 3 is set to the back portion forming band 52 and the front band portion forming band 53 in the process, the front waist elastic member 20 can be applied to the absorbent main body 3.

  Therefore, in this manufacturing method, since the absorptive main body 3 can be positioned with respect to the back part formation band 52 and the front band part formation band 53 before application | coating of the elastic strip 50a, the fastening operation | work of the absorptive main body 3 is possible. As a result, it is not necessary to position the absorbent main body 3 while extending it, and as a result, workability can be improved.

  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 molded 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 times.

[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 the front view which expands and shows a part of disposable pants of an initial form, (a) is what the elastic member for front waist was provided by the elastic band, (b) is the elastic member for front waist by the elastic band piece. Each given is shown. 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 manufacturing method of the conventional disposable pants.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening-and-closing type disposable pants 3 Absorbent main body 3a Front part 3b Rear part 20 Elastic member for front waist 34c Both ends 50 Elastic band 50a Elastic band piece 51 Perforation 52 Rear part formation band 53 Front belt part formation belt P1, P2 Front belt part Q back

Claims (3)

A back part, a front belt part extending from the back part to both sides in the width direction, an absorptive body that can be folded back from the back part to the front side of the wearer through the crotch, and provided at the front part of the absorptive body A front waist elastic member attached in a stretched state along the width direction, and fasten the front belt portion wrapped around the waist of the wearer and the folded absorbent main body on the front side It is a manufacturing method of an openable disposable pants that can be worn as a form,
A front and rear belt transporting process for transporting the back belt forming belt and the front belt belt forming belt in parallel along the line direction;
An absorptive main body setting step for joining the rear portion of the absorbent main body to the rear back forming band being transported, and fixing the front portion of the absorbent main body to the front band portion forming band,
An elastic band conveying step for conveying the elastic band attached in a stretched state along the longitudinal direction of the elastic member for the front waist, so that the longitudinal direction is along the line direction;
A perforation forming step of forming a perforation along the width direction of the elastic band at an interval corresponding to the width dimension of the front portion of the absorbent main body,
The elastic band is arranged so that the front part of the absorbent main body is sandwiched between the front band part forming band and the front part of the absorbent main body is positioned between the perforations. Joining step of joining to the front part and the front belt part forming band,
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,
It includes a front and rear band cutting step for cutting the bonded back portion forming band and the front band forming band and the elastic band bonded to both the bands along the upstream connecting portion. A method for manufacturing an openable disposable pants.   The manufacturing method of the open-and-close type disposable pants according to claim 1, further comprising a weakening step of weakening a stretching force of the elastic member for the front waist for at least a range of the elastic band to be bonded to the front band forming band. The manufacturing method of the opening-and-closing type disposable pants characterized by the above-mentioned. A back part, a front belt part extending from the back part to both sides in the width direction, an absorptive body that can be folded back from the back part to the front side of the wearer through the crotch, and provided at the front part of the absorptive body A front waist elastic member attached in an extended state along the width direction, and fasten the front belt portion wound around the wearer's waist and the folded absorbent main body on the front side It is a manufacturing method of an openable disposable pants that can be worn as a form,
A front and rear belt transporting process for transporting the back belt forming belt and the front belt belt forming belt in parallel along the line direction;
An absorptive main body setting step for joining the rear portion of the absorbent main body to the rear back forming band being transported, and fixing the front portion of the absorbent main body to the front band portion forming band,
The elastic member for the front waist is attached in a stretched state along the longitudinal direction, and the elastic band piece adjusted in accordance with the width of the front part of the absorbent main body is connected to the front belt part forming band. A joining step for placing the front part of the absorbent main body between them and joining the front part of the absorbent main body;
A folding step in which the absorbent main body is folded in half so as to overlap the back portion forming zone and the front portion forming zone;
A side seal step of 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 portion,
The manufacturing method of the open-and-close-type disposable pants characterized by including the back-and-front band cutting process of cutting both the joined belts along the upstream joint part.

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