JP5128711B1 - Method and apparatus for manufacturing a crimped fastener part in a crimped fastener-jointed pant body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a pressure-sensitive adhesive such as a double-sided tape or an adhesive layer in order to fix a crimp fastener for closing a front and rear open type pant body to an ear piece-like part.
A belt-like continuous sheet serving as a first piece of a pressure-bonding fastener is formed in a part of the area of its own fastener functional portion at a widthwise intermediate portion of the belt-like continuous sheet serving as an ear piece-like portion having a width wider than that. Partially heat-welded. Then, it is crimped by a continuous cutting line that repeats the amplitude of a one-stroke letter that intersects both side edges of the continuous sheet that becomes the first piece of the crimping fastener and protrudes outward and reaches the region of the continuous sheet that becomes the ear piece-like portion. An integrated laminated sheet of a continuous sheet serving as a fastener first piece and a continuous sheet serving as an ear piece is cut along the continuous cutting line. It is divided into a plurality of pieces corresponding to the individual ear pieces. Each of the divided laminated sheets is fixed to the pant body as a fastener member to form an ear piece-like portion with a crimp fastener first piece.
[Selection] FIG.

Description

  The present invention relates to a method for manufacturing a crimping fastener part in a pant body that extends forward and backward through the crotch part of the wearer and whose front part and rear part are detachably joined by a crimping fastener, for example, a disposable paper diaper that opens front and rear. And an apparatus.

  For example, the thing of patent document 1 is known as one type of disposable paper diaper.

JP-A-10-99374

  There, as a paper diaper using a hook and loop fastener, it extends back and forth through the crotch part, for example, a hook and loop fastener first piece protruding left and right from both sides of the rear part is crimped to the front hook and loop fastener second piece What is joined is disclosed. Therefore, the hook-and-loop fastener first piece (the same applies to the second piece) is joined to the ear piece-like attachment piece protruding to the left and right of the waist contact part (rear part) by the adhesive layer of the double-sided adhesive tape. However, a process of arranging a double-sided adhesive tape or the like is necessary for joining by the adhesive layer, and the manufacturing process becomes complicated, which results in an increase in product cost.

  The subject of this invention is providing the manufacturing method and apparatus of a crimping fastener part in the crimping fastener joining type pants body which improved the problem of fixation by such a double-sided adhesive tape.

Means for Solving the Problems and Effects of the Invention

Invention of the manufacturing method, in the manufacturing method of the crimping fastener part in the pants body that extends back and forth through the wearer's crotch part, the front part and the rear part are detachably joined by the crimping fastener,
It is laminated and fixed to an ear piece having thermoplasticity protruding from one side edge of the front part and the rear part, and removably joined to the second piece of the crimping fastener fixed to the other of the front part and the rear part. When forming the first crimped fastener piece with thermoplasticity, the belt-like continuous sheet serving as the first crimped fastener piece is replaced with the intermediate portion in the width direction of the strip- like continuous sheet serving as the wider ear piece-like portion. In addition, a heat welding step of stacking and fixing by partially heat-welding in a part of the area of the fastener function part of itself,
Both sides of the continuous sheet that becomes the first piece of the crimping fastener intersect with each other and protrude to the outside to reach the region of the continuous sheet that becomes the ear piece-like portion, and then turn on both sides of the continuous sheet that becomes the first piece of the crimping fastener again. A continuous cutting line that repeats the amplitude of a one-stroke letter that intersects with the continuous sheet that is the first piece of the crimping fastener and the continuous laminated sheet that is the ear piece-like portion is cut, and the laminated sheet is A cutting step of cutting along the continuous cutting line;
A dividing step of further dividing the cut laminated sheet into a plurality of pieces so as to correspond to the individual ear pieces,
A fixing step of fixing the divided individual laminated sheets as fastener members to one of the front part and the rear part of the pant body to form the ear piece-like part with the first piece of the crimping fastener,
Including
In the thermal welding step, the continuous sheet serving as the first crimping fastener piece and the continuous sheet serving as the ear piece-like portion are thermally welded by ultrasonic waves at a plurality of locations distributed in an island shape, and other ultrasonic waves as a heat weld portion formed by the crimping fastener transverse border pattern unit repeating the transverse longitudinal border both side edges of the pattern portion and its band-shaped along both side edges of the continuous sheet comprising a first strip, or the crimp fastener first the transverse border pattern unit repeating the crossing of both side edges of the continuous sheet as a one-piece, are included,
In the cutting step, the crimping fastener first piece is formed such that the continuous cutting line passes through the middle of the transverse border pattern portion in the width direction and the transverse border pattern portion is divided on both sides of the cutting line. It cut | disconnects with respect to the lamination sheet integral with a continuous sheet and the continuous sheet used as the said ear piece-like part, It is characterized by the above-mentioned.

  According to the above manufacturing method, there is no pressure-sensitive adhesive or pressure-sensitive adhesive layer by laminating and fixing (integrating) the continuous sheet to be the crimping fastener first piece and the continuous sheet to be the ear piece-like portion by heat welding. Fixing can be performed easily and quickly without using double-sided tape or the like, and production efficiency is increased. Further, by cutting (for example, dividing into two) the laminated sheet thus heat-welded by a continuous cutting line that repeats the amplitude of a single stroke, a plurality of protruding shapes of the ear piece-like portion are formed at the same time, and productivity is improved. . Further, if a longitudinal border pattern portion or a transverse border pattern portion is formed as a thermal welding pattern, the pattern portion remains as a border portion on at least a part of the outer edge portion of the crimping fastener first piece. Therefore, the fixing strength of the crimping fastener first piece with respect to the ear piece-like portion is increased, and the outer edge portion (edge) of the crimp fastener first piece is less likely to be peeled off or turned up. The touch of the edge is also improved.

The invention of the manufacturing apparatus is a manufacturing apparatus of a crimping fastener part in a pant body that extends back and forth through the crotch part of the wearer and the front part and the rear part are detachably joined by the crimping fastener.
It is laminated and fixed to an ear piece having thermoplasticity protruding from one side edge of the front part and the rear part, and removably joined to the second piece of the crimping fastener fixed to the other of the front part and the rear part. When forming the first crimped fastener piece with thermoplasticity, the belt-like continuous sheet serving as the first crimped fastener piece is replaced with the intermediate portion in the width direction of the strip-like continuous sheet serving as the wider ear piece-like portion. In addition, a thermal welding device that stacks and fixes by partially thermally welding in a part of the area of the fastener function portion of itself,
Crossing both side edges of the continuous sheet as the first piece of the crimping fastener and protruding outward to reach the region of the continuous sheet as the ear piece-like portion, and then turn both sides of the continuous sheet as the first piece of the crimping fastener again. A continuous cutting line that repeats the amplitude of a one-stroke letter that intersects with the continuous sheet that is the first piece of the crimping fastener and the continuous laminated sheet that is the ear piece-like portion is cut, and the laminated sheet is A cutting device for cutting along the continuous cutting line;
A cutting device that further cuts the cut laminated sheet into a plurality of pieces so as to correspond to the individual ear pieces,
A fixing device for fixing the divided laminated sheets as fastener members to one of the front part and the rear part of the pant body to form the ear piece-like part with the first piece of the crimping fastener,
Including
In the thermal welding apparatus, the continuous sheet serving as the first crimping fastener piece and the continuous sheet serving as the ear piece-like portion are thermally welded by ultrasonic waves at a plurality of locations distributed in an island shape, and other ultrasonic waves as a heat weld portion formed by the crimping fastener transverse border pattern unit repeating the transverse longitudinal border both side edges of the pattern portion and its band-shaped along both side edges of the continuous sheet comprising a first strip, or the crimp fastener first the transverse border pattern unit repeating the crossing of both side edges of the continuous sheet as a one-piece, are included,
In the cutting apparatus, the crimping fastener first piece is formed such that the continuous cutting line passes through the middle in the width direction of the transverse border pattern portion and the transverse border pattern portion is divided on both sides of the cut line. It cut | disconnects with respect to the lamination sheet integral with a continuous sheet and the continuous sheet used as the said ear piece-like part, It is characterized by the above-mentioned.

The front view of the state which opened the pressure bonding fastener of the pressure bonding fastener joining type pants body (disposable disposable diaper). The figure which shows typically the 1st piece and 2nd piece of a crimping | compression-bonding fastener. The front view of the state which closed the crimping fastener of the underpants body of FIG. The front view of Example 1-4 of the ear piece-like part of FIG. 1 and a crimping fastener 1st piece (fastener member). The perspective view which shows the continuous sheet used as the ear piece-shaped part used at the process of the manufacturing method of this invention, and the continuous sheet used as the crimping | fitting fastener 1st piece laminated | stacked on this. The figure which shows an example of the manufacturing apparatus of this invention simply. The figure which shows an example of the heat welding apparatus used for a pattern formation process. The figure which shows an example of the cutting device and cutting device used for the cutting | disconnection and parting after heat welding. The figure which shows the example 1-example 4 of a pattern roll typically. The top view of the lamination sheet after forming the pattern of heat welding in Example 1 of a manufacturing method. FIG. 11 is a plan view in which cutting lines continuous in an S shape are added to the pattern of FIG. 10. The top view of the lamination sheet divided into 2 by the cutting line. The top view which divided each lamination sheet piece of Drawing 12 further. FIG. 14 is a front view showing a state in which one of the minute pieces in FIG. 13 is fixed to a paper diaper as a fastener member. The top view of the lamination sheet after forming the pattern of heat welding in Example 2 of a manufacturing method. The top view which added the cutting line which continues in S shape to the pattern of FIG. The top view of the lamination sheet divided into 2 by the cutting line. The top view which further divided each lamination sheet piece of FIG. The front view which shows the state in which one of the fraction pieces of FIG. 18 is fixed to a paper diaper as a fastener member. The top view of the lamination sheet after forming the pattern of heat welding in Example 3 of a manufacturing method. The top view which added the cutting line which continues in S shape to the pattern of FIG. The top view of the lamination sheet divided into 2 by the cutting line. The top view which divided each lamination sheet piece of Drawing 22 further. FIG. 24 is a front view showing a state in which one of the minute pieces in FIG. 23 is fixed to a paper diaper as a fastener member. The top view of the lamination sheet after forming the pattern of heat welding in Example 4 of a manufacturing method. FIG. 26 is a plan view in which cutting lines continuous in an S shape are added to the pattern of FIG. 25. The top view of the lamination sheet divided into 2 by the cutting line. The top view which further divided each lamination sheet piece of FIG. FIG. 29 is a front view showing a state in which one of the minute pieces in FIG. 28 is fixed to a paper diaper as a fastener member. The top view which added the cutting line which continues in a S shape to the lamination sheet after forming the pattern of heat welding in Example 5 of a manufacturing method. The top view of the lamination sheet divided into 2 by the cutting line. The front view which shows the state by which one of the fragment pieces obtained by further dividing each lamination sheet piece of FIG. 31 was fixed to the paper diaper as a fastener member. The top view which added the cutting line which continues in a S shape to the lamination sheet after forming the pattern of heat welding in Example 6 of a manufacturing method. Flat face view of a laminated sheet which is 2 minutes by the cutting line. Positive surface view of one but a state of being fixed to the paper diaper as a fastener member minute fragment obtained by further dividing the respective lamination sheet piece of Figure 34. The top view which added the cutting line continuous in S shape to the lamination sheet after forming the pattern of heat welding in Example 7 of a manufacturing method. Flat face view of a laminated sheet which is 2 minutes by the cutting line. Positive surface view of one but a state of being fixed to the paper diaper as a fastener member minute fragment obtained by further dividing the respective lamination sheet piece of Figure 37. The front view which shows simply the examples 8-10 of the crimping | compression-bonding fastener member of a pants body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a disposable paper diaper 1 as a pant body which is a premise of manufacturing, and a front part 2 and a rear part 3 are separated via a crotch part of a wearer. A water absorbing material 9 is disposed across the front portion 2 and the rear portion 3, and a flexible sheet-like fastener member 5 is fixed to the both side protruding portions 4 of the rear portion 3. The fastener member 5 is fixed to the left and right protrusions 4 of the rear part 3 (more specifically, fixed by being sandwiched between the sheets of the protrusions 4), and protrudes outward from the side from there. An ear piece 6 and a crimp fastener first piece 7 fixed so as to cross the ear piece 6 are provided. This crimping fastener first piece (including a male fastener projection piece 10 schematically shown in FIG. 2) 7 is crimped to a crimping fastener second piece (also including a female fastener loop 11) 8 fixed to the front portion 2. Thus, the front part 2 and the rear part 3 are closed. FIG. 3 shows this state.

FIG. 4 shows Examples 1 to 4 of the fastener member 5. In the fastener member 5 (5A to 5D) shown in FIGS. 4A to 4D, the crimping fastener first piece 7 is laminated so as to cross the ear piece-like portion 6, and the ear piece-like portion 6 and the crimping fastener first piece are laminated. The upper and lower edges of 7 coincide with each other. In the fastener member 5 </ b> A, island-like joints 33 are distributed almost uniformly as partial joints, particularly joints distributed in a plurality of dot-like, line-like, or block-like shapes. Another island-shaped junction 33 of the well distributed multipoint shape as shown, for example, be a scattered point-like manner junction distributed at several points. The fastener member 5A is further provided with rim portions 38, 38 (described later) on both side edges in the direction crossing the ear piece 6 (narrow width of about 1/10 to 1/5 of the width of the fastener member 5A). The edge portion 13 is also formed). These island-like joint portions 33 and edge portions 38 are formed as a result of solidification of the heat-welded portion by ultrasonic waves, and both are partially formed with respect to the area of the fastener functional portion of the crimping fastener first piece 7 . It is a heat welding part.

In addition to the island-shaped joint portion 33 and the edge portions 38 and 38, the fastener member 5B is formed with thin belt-like edge portions 13 and 13 along the upper and lower edges of the fastener member 5B. In the example, the edge portions 13 and 38 are formed (in the form of a square frame), and the inner region is a region that performs a crimping function except for the island-shaped joint portion 33. In addition to the island-shaped joint portion 33, the fastener member 5 </ b> C is formed with thin strip-shaped edge portions 13 and 13 along the upper and lower end edges of the ear piece-like portion 6. Furthermore, the fastener member 5D has only the island-shaped joint portion 33, and the rim portions 13 and 38 are not formed. It trimmed part 13,38 as described above, crimping fastener first strip 7 is a sheet material having a thermoplastic, results the strip-like portion is solidified by thermal welding is formed.

Next, a manufacturing method and apparatus will be described with reference to FIG.
FIG. 5 shows a belt-like continuous sheet (a flexible sheet containing a thermoplastic resin component) 15 that becomes the ear piece-like portion 6 that is the base material of the fastener member 5 and a belt-like shape that becomes the crimp fastener first piece 7. A state of a previous stage in which the continuous sheet 17 (a flexible sheet containing a thermoplastic resin component) is laminated and fixed by heat is shown. Hereinafter, the belt-like continuous sheet serving as the ear piece 6 is referred to as a first continuous sheet 15, and the belt-like continuous sheet serving as the crimping fastener first piece 7 is referred to as a second continuous sheet 17. The second continuous sheet 17 includes a large number of hooks, protrusions, and the like, which are fastener function portions , on the surface thereof. For example, when the second continuous sheet 17 is solidified by heat melting with a heating head and bonded to the first continuous sheet 15, or the second continuous sheet 17 is thermally melted and solidified by vibration of ultrasonic waves and bonded to the first continuous sheet 15. There are cases. The method is not limited as long as it is a heat melting method. However, since the joining is based on heat melting and solidification, both the first continuous sheet 15 and the second continuous sheet 17 include a thermoplastic resin material.

  The second continuous sheet 17 is narrower than the first continuous sheet 15 and is laminated at the center of the first continuous sheet 15. A laminate of the first continuous sheet 15 and the second continuous sheet 17 is referred to as a laminated sheet 18. FIG. 6 shows an example of an apparatus for performing a pattern forming process by heat welding and a cutting process for cutting the patterned laminated sheet body 18 on such a laminated sheet 18. In the pattern forming process, an ultrasonic vibration device (hereinafter referred to as an ultrasonic horn) 20 and a pattern roll 21 are used. In the cutting step after pattern formation, an anvil roll 22 and a cutter roll 23 are used. Each of the rolls 21, 22, and 23 rotates in the direction of the arrow in the figure, and the pattern forming and cutting process described above is performed while the laminated sheet 18 is routed between the rolls 21, 22, and 23 and conveyed accordingly. Is done.

  FIG. 7 shows a simplified pattern forming process. The pattern roll 21 forms a pattern obtained by solidification after heat melting on the laminated sheet 18 together with the ultrasonic horn 20. On the outer periphery of the pattern roll 21, there are a plurality of small protrusions 29 (groups) that form a plurality of (in this example, multipoint) island-shaped joints 33. The ultrasonic horn 20 sandwiches the laminated sheet 18 between these small protrusions 29, gives ultrasonic vibration energy to the laminated sheet 18, and the first and second continuous sheets 15 and 17 are generated by heat generated by the vibration. Is melted according to the above pattern, it is solidified, and both sheets 15 and 17 are joined in a predetermined pattern. In FIG. 7, in order to avoid complicated description, a simple pattern roll 21 in which the above-described border portions 13 and 38 are not formed is schematically illustrated.

4A, the pattern roll 21 is arranged in the circumferential direction of the pattern roll 21 in addition to the multipoint pattern of the plurality of small protrusions 29 as shown in FIG. 9A. Are provided with two thin belt-like first convex portions 25. When the edge portions 13 and 38 in FIG. 4B are formed, as shown in FIG. 9B, the pattern roll 21 includes the pattern roll 21 in addition to the plurality of small protrusions 29 and the first convex portions 25. having a plurality of second convex portions 28 in the circumferential direction at predetermined intervals, and in a direction transverse to the outer peripheral surface of the. If Figure 4 trimmed part 13 as shown in (C) is formed, as shown in FIG. 9 (C), the pattern roll 21, the first convex portion 25 is not be closed, in addition to the group of small protrusions 29 , at predetermined intervals in the circumferential direction of the pattern roll 21, and a plurality of second convex portions 2 8 transversely to its peripheral surface. If there is no border portion as in FIG. 4 (D) pattern roll 21 is assumed with only the group of the small projections 29 as shown in FIG. 9 (D) to the outer periphery.

In FIG. 7, the cutter roll 23 which gives a continuous S-shaped cutting line in FIG. 8 to the laminated sheet 18 after pattern formation by the ultrasonic horn 20 and the pattern roll 21, and the cutter roll. The anvil roll 22 provided with the receiving convex part 31 which narrows the lamination sheet 18 between 23 is used. The cutter roll 23 is provided with a cutter 24 that repeats an S-shape on the outer periphery, and the receiving convex portion 31 of the anvil roll 22 that receives the cutting edge of the cutter 24 is also formed to repeat the S-shape. As cutter 2 4 and receiving projection 31 in FIG. 8 is a cross section perpendicular to the shaft, although they are depicted as if there are a plurality, in fact, these projections are continuously linearly. That is, for example, the cutter 2 4 and receiving projection 31 while the amplitude on a single stroke shape as S-shaped form is repeated continuously. The cutting line is not necessarily limited to an S shape as long as it is a cutting line that swings in a single stroke. A dividing roll 26 and an anvil roll 27 that are divided into individual fastener members are provided downstream of the cutter roll 23 that repeats the S-shape. The dividing roll 26 has a cutter 26A (for example, a plurality of blades along a straight line in the generatrix direction of the outer peripheral surface) that gives a linear cutting line, and an S-shaped cut was made with the anvil roll 27. While being conveyed with the subsequent laminated sheet 18 being sandwiched, a dividing line that is usually perpendicular to the longitudinal direction of the sheet 18 is provided at a predetermined interval (pitch of each fastener member) in the length direction.

As shown in FIG. 9 (A) ~ (D) , the ultrasonic horn 20 facing is installed in a position fixed to the outer peripheral surface of the pattern roll 21, opposed to a large number of small projections 29 of the pattern roll 21. When at least one of the first convex portion 25 and the second convex portion 28 exists, the ultrasonic horn 20 faces at least one of the convex portions 25 and 28. In such a process, in the pattern portion corresponding to the small protrusions 29 (and the existing convex portions 25 and 28), a heat welded portion by ultrasonic vibration is formed on the laminated sheet 18 as a joint portion.

FIG. 10 shows a pattern formed as a joint on the laminated sheet 18 when the fastener member 5A of FIG. This pattern includes a multi-point island-like joint portion 33 formed by a large number of small protrusions 29 and two strip-like longitudinal edge pattern portions 38A (finally bordered) extending in parallel along both side edges of the first continuous sheet 15. Edging portion scheduled to be part 38). Such a pattern extends to both the first continuous sheet 15 which becomes the ear piece-like portion 6 and the second continuous sheet 17 which is the first piece 7 of the crimping fastener. 15 and 17 are joined and it becomes the above-mentioned integral laminated sheet 18.

FIG. 11 shows a state in which a continuous cutting line 35 with an S-shaped repetitive pattern is given to such a bonding (thermal welding) pattern. The S-shaped continuous cutting line 35, protruding in the region of the first continuous sheet 15 of the outer as well as intersects the side edges of the second continuous sheet 1 7 in the laminated sheet 18, where the turn and again the second continuous sheet 1 Repeat the amplitude of a one-stroke letter that intersects both sides of 7 . FIG its continuous cut line 35 crosses the longitudinal border pattern section 38 A, 38 A located on both side edges of the second continuous sheet 1 7, also configured to turn in the region of the second continuous sheet 1 7, for the purpose This corresponds to the form of the ear piece 6 of the fastener member 5A shown in FIG.

  Such a cutting locus is given by the cutter roll 23 including the cutter 24 that is continuously repeated in an S-shape as shown in FIG. The laminated sheet 18 is sandwiched between the cutter roll 23 and the anvil roll 22 having a receiving convex portion 31 that is continuously repeated in an S shape that receives the cutter 24, and is continuously S-shaped as the laminated sheet 18 is conveyed. Will be cut.

As a result, as shown in FIG. 12, the laminated sheet 18 is divided into two parts, a first laminated sheet piece 18A and a second laminated sheet piece 18B. In addition, when the lamination sheet 18 passes between the anvil roll 22 and the cutter roll 23, it cut | disconnects in the cutting line 35 shown in FIG. 11, and flows downstream as it is. FIG. 12 shows the laminated sheet pieces 18A and 18B apart from each other in order to show the form of cutting. And by the dividing roll 26 and the anvil roll 27 shown in FIG. 8, when the cutting line 36 is further inserted in FIG. 12, as shown in FIG. 13, the first laminated sheet piece 18A and the second laminated sheet piece 18B become These are divided into one fastener member 5A.

  As shown in FIG. 14, the fastener member 5A thus obtained has its fixing portion 12 sandwiched between the sheets stacked on the protruding portions 4 on both sides of the rear portion 3 of the pant body 1, and an appropriate member. In the production line of the pant body 1, it is integrated with the protruding portion 4 (or the portion that should become the protruding portion 4) by a method (for example, adhesion with an adhesive (glue)). Thereby, it becomes the form which the ear piece-shaped part 6 protruded from the side edge of the protrusion part 4 to the side. The crimping fastener first piece 7 obtained as described above is joined to the ear piece 6 in a transverse form, and both end edges of the crimp fastener first piece 7 coincide with both side edges of the ear piece 6. . Further, edge portions 38 and 38 are formed by thermal welding on both side edges of the crimping fastener first piece 7, and multi-point island-like joint portions 33 are present in other regions (inner regions).

The border portions 38 and the island-shaped junction 33 functions as a non-adhesive bonding means for bonding without using a viscosity Chakuzai or adhesive layer bonding the fastener first piece 7 with respect to the ear-piece-like portion 6. On the other hand, for example, a group of male fastener projection pieces 10 (hook portions, mushroom-shaped small pieces, etc.) shown in FIG. 2 remaining on the surface of the crimping fastener first piece 7 excluding the edge portions 38 and 38 and the island-shaped joint portion 33 It bears the original crimping fastener function of being pressed and joined to the female fastener loop 11 or the like of the crimping fastener second piece 8. The both side edges of the crimping fastener first piece 7 shown in FIG. 14 are firmly fixed to the ear piece-like portion 6 and do not peel off or rise from the ear piece-like portion 6, and are portions between the edge portions 38, 38. In addition, since it is joined to the ear piece 6 by the plurality of island joints 33, it can be used for a long time without peeling from the ear piece 6 even when it is repeatedly used as the crimp fastener first piece 7. In addition, when there is no rim portion 38, for example, many male fastener function portions (projections, hooks, etc.) are exposed on the side edge, so there is a feeling of roughness when touched with the hand, soft If you or touch the skin or there is a case where there is caused discomfort by rubbing but, if there is such a border section 38, such this both less likely to occur.

FIGS. 15 to 18 show Example 2 of the manufacturing method. In addition to the longitudinal border pattern portion 38 </ b > A and the plurality of island-shaped joint portions 33, the laminated sheet 18 has a direction across the second continuous sheet 17. A predetermined-width transverse border pattern portion 13A (a border portion scheduled to be the border portion 13 in FIG. 4B) is formed. Border pattern unit 13A in the length direction of the second continuous sheet 1 7 across the second continuous sheet 1 7 at a predetermined pitch, leading to both sides of the border pattern portion 38A, edging pattern portion 13A, 38A is To integrally As a whole, it becomes a ladder-like border pattern part. In the inner region surrounded by the border pattern portions 13 A and 38 A , a plurality of island-shaped joint portions 33 are located as in the first example.

The border pattern portion 13A is divided in half by passing a cutting line in the middle in the width direction, and each of the half border pattern portion 13A remains on the intended fastener member 5B. The width of the border pattern portion 13A is set wider than the width of the longitudinal border pattern portion 38A. The transverse border pattern portion 13A, in order to correspond to the protruding form of the ear-piece-like portion 6 shown in FIG. 19 (is trapezoidal in this case), plus a trapezoidal shape with respect to the width direction of the second continuous sheet 17 A slope and a negative slope are alternately formed . Such a pattern of heat welding shown in FIG. 15 is between the small projection 29, the first convex portion 25, the second convex portion 28 and the ultrasonic horn 20 of the pattern roll 21 shown in FIG. It is given in the process in which the laminated sheet 18 in which the first continuous sheet 15 and the second continuous sheet 17 are laminated moves while being narrowed. With respect to such a ladder-like pattern, a cutting line 35 that repeats and continues in the same S shape as in Example 1 is provided by the anvil roll 22 and the cutter roll 23 shown in FIG.

At this time, as shown in FIG. 16, in the cutting line 35 that repeatedly repeats in an S-shape, the cutting line that crosses the first continuous sheet 15 while being slightly inclined along the bordering pattern portion 13A is the width direction of the bordering pattern portion 13A. And the border pattern portion 13A is divided into two. As conceptually shown in FIG. 17, the laminated sheet 18 and the first product layer sheet pieces 18A are cut in the second product layer sheet piece 18B is cut at a predetermined pitch in the longitudinal direction of each sheet pieces 18A and 18B Lines 36 are inserted and divided into individual fastener members 5B as shown in FIG. Finally, as shown in FIG. 19, the edge portions 38 on both side edges of the crimp fastener first piece 7 crossing the ear piece 6 and the edge portions 13 on both side edges in the transverse direction are combined to form a rectangular frame. A continuous rim portion is formed, and a plurality of island-shaped joint portions 33 are located therein.

A group of protrusions and hooks that are, for example, male fastener function portions existing in a region excluding the edge portions 13 and 38 and the island-shaped joint portion 33 perform a surface fastener action with the second crimping fastener piece 8 . If it does in this way, the adhesive strength to the ear piece part 6 of the crimping fastener 1st piece 7 is naturally unnecessary for the joining of the crimping fastener first piece 7 and the ear piece part 6. The frame-shaped borders 13 and 38 are further strengthened. Further, the outer peripheral edge of the crimping fastener first piece 7 is entirely formed by the edge portions 13 and 38 as the heat welding portions, and the edges of the numerous projections, hooks, loops and the like as the fastener function portions are covered by the edge portions 13 and 38. Since it has a structure that is not exposed, it does not feel rough when the user touches it, and it is a user-friendly product that hardly feels strange even when touching soft skin of an infant or the like.

20 to 23 show Example 3 of the manufacturing method. Example 3 15 Example 2, by omitting the longitudinal border pattern portion 38A which is present in both side edges of the second continuous sheet 1 7 in FIG. 16, FIG. 20, as shown in Figure 21, the transverse A heat welding pattern in which the border pattern portion 13A and the plurality of island-shaped joint portions 33 are combined is employed. This pattern is formed on the laminated sheet 18 by the ultrasonic horn 20 of FIG. 9C and the pattern roll 21 (many small projections 29, second convex portions 28), whereby the first continuous sheet 15 and the second continuous sheet 15 are formed. The continuous sheet 17 is joined by thermal welding using ultrasonic waves. In FIG. 20 and FIG. 21, as in Example 2, the laminated sheet 18 is first formed as shown in FIG. 22 by a cutting line 35 that repeats and continues in an S shape and passes through the middle in the width direction of the bordering pattern portion 13A in the transverse direction. The second laminated sheet pieces 18A and 18B are divided into two. Furthermore, it cut | disconnects by each cutting line 36, and is divided | segmented (divided) into each fastener member 5C like FIG. 24, as in Examples 1 and 2, the fastener member 5C is fixed to the protruding portion 4 of the paper diaper, and the crimping fastener first piece 7 is positioned so as to cross the ear piece-like portion 6. In this example, the pressure-bonding fastener first piece 7 is joined to the ear piece-like portion 6 without using an adhesive or the like by the island-like joint portion 33 and the edge portion 13, and corresponds to both side edges of the ear piece-like portion 6. The presence of the edge portions 13 at both ends of the crimping fastener first piece 7 to be bonded increases the bonding strength to the ear piece-like portion 6 at the both ends, and is less likely to cause roughness when touched.

25 to 28 show Example 4 of the manufacturing method. In Example 4, no edging Ri portions 13,38 that existed Examples 1-3, using a pattern roll 21 having the outer periphery of the ultrasonic horn 20 and a number of small projections 29 in FIG. 9 (D), the FIG. 25, as shown in FIG. 26, the first continuous sheet 15 and the second continuous sheet 17 are thermally welded by the multi-point island-shaped joint portion 33 without using the adhesive or the adhesive layer, and the laminated sheet 18 is integrated. And Thereafter, as in Example 1-3, the cut line 35 which repeatedly continuous S-shape, and 2 minutes a laminated sheet 18 as shown in FIG. 27 first, second product layer sheet pieces 18A, to 18B, further individual The fastener member 5D shown in FIG.

  If this is fixed to a paper diaper like Example 1-Example 3, the crimping | compression-bonding fastener 1st piece 7 joined by the island-like junction part 33 to the ear piece-like part 6 will be obtained. In this case, the edge portions 13 and 38 of Examples 1 to 3 are not provided, but the joining strength with the ear piece-like portion 6 is ensured by the large number of island-like joint portions 33. In addition, since the distribution area of protrusions, hooks, loops, or the like as the crimping fastener function portion is widened, the crimping strength as the crimping fastener can be made higher than when the edge portions 13 and 38 are present.

30 to 32 show Example 5 of the manufacturing method (also Example 5 of the fastener member 5 of the pant body). In Example 5, the multi-point or scattered island-shaped joint portions 33 in FIG. 11 are omitted, and as shown in FIG. 30, only the longitudinal border pattern portions 38A on both sides of the second continuous sheet 17 are laminated sheets. 18 by joining, by cutting a continuous cutting line 35 of the S-shaped, is divided into first, second product layer sheet pieces 18A, after the 18B, the individual divided pieces along the line 36 as shown in FIG. 31 . As shown in FIG. 32, the piece is fixed to the paper diaper as a fastener member 5E. Also by this, the pressure-bonding fastener first piece 7 can be joined to the ear piece-like portion 6 without using an adhesive or an adhesive layer, and the same effect as described in Example 1 by the edging portion 38 can be obtained. .

FIGS. 33 to 35 show Example 6 of the manufacturing method (also Example 6 of the fastener member 5 of the pants body). In Example 6, the multipoint or scattered island-like joint portions 33 in FIG. 16 are omitted, and as shown in FIG. 33, the longitudinal border pattern portions 38 </ b> A and the transverse borders on both sides of the second continuous sheet 17. the pattern portion 13A joined to laminate sheet 18, is cut in a continuous cutting line 35 of the S-shape, first, second product layer sheet piece 18A as shown in FIG. 34, after the 18B, each along line 36 Divide into pieces. The fragment is fixed to the paper diaper as a fastener member 5F as shown in FIG. This also allows the crimping fastener first piece 7 to be joined to the ear piece-like portion 6 without using an adhesive or an adhesive layer, and has the same effect as described in Example 2 by the edge portions 13 and 38. can get.

36 to 38 show Example 7 of the manufacturing method (also Example 7 of the fastener member 5 of the pant body). In Example 7, the multipoint or scattered island-shaped joint portions 33 in FIG. 21 are omitted, and as shown in FIG. 36, the laminated sheet 18 is joined only by the transverse border pattern portion 13A of the second continuous sheet 17. and, by cutting a continuous cutting line 35 of the S-shaped, after the first, second product layer sheet pieces 18A, 18B as shown in FIG. 37, is divided into individual partial fragments along line 36. As shown in FIG. 38, the piece is fixed to the paper diaper as a fastener member 5G. Also by this, the pressure-bonded fastener first piece 7 can be joined to the ear piece-like portion 6 without using an adhesive or an adhesive layer, and the same effect as described in Example 3 by the edging portion 13 can be obtained. .

In the above description, an example in which the first crimping piece 7 to be joined to the ear piece 6 is a male fastener has been shown, but this is replaced with a female fastener, and a male fastener is provided at the front of the pant body. May be. Also in Figure 39, the fastener member 5H example 8 Example 10, 5I, to indicate 5 J, the (A), rather than completely across the ear-piece-like portion 6 (B), the ear-piece-like portion The crimping fastener first piece 7 may be formed in an island shape with respect to 6 and partially joined to the ear piece-like portion 6 as described above. On the other hand, instead of traversing the lug-shaped portion 6 in a strip shape as shown in (C), crimping fastener first piece 7 over the entire ear-piece-like portion 6 is laminated, by partial joints as described above It may be integrated with the ear piece 6.

In short, the pant body to be manufactured is a pant body that extends back and forth through the crotch part of the user, and the front part and the rear part are detachably joined by the crimp fastener. A crimping fastener first piece fixed to an ear piece-like portion protruding from one side edge of the front part and the rear part, and detachably joined to a crimping fastener second piece fixed to the other of the front part and the rear part. Prepare. In addition, the laminated ear piece portion and the crimping fastener first piece having thermoplasticity with each other are partially formed with respect to the area of the fastener function portion to be joined to the crimping fastener second piece of the crimping fastener first piece. Laminated and fixed by the heat welded part. The remaining fastener functional part that is not thermally welded to the first crimping fastener piece is joined to the second crimping fastener piece. Here, the crimping fastener first piece is either a so-called male fastener (hook portion or the like) or a female fastener (loop portion or the like), and the crimping fastener second piece is the other.

  The first piece of the crimping fastener is joined to the ear piece-like portion by a plurality of island-shaped heat welding portions on the planar fastener functional portion of the crimping fastener, and the crimping fastener first piece is not thermally welded. The fastener functioning part is joined to the crimping fastener second piece. In addition, at least a part of the outer edge portion of the crimping fastener first piece laminated and integrated on the ear piece portion is formed into an ear piece portion by a heat welding portion formed in a band shape with a predetermined width along the outer edge portion. It is heat-welded, and this is used as an edge portion by heat-welding.

In the above-described pant body manufactured by the method and apparatus according to the present invention, the first part of the crimping fastener and the ear piece-like part are partially with respect to the area of the fastener function part of the first part of the crimping fastener. Since the formed heat welding parts are integrated with each other, an adhesive such as a double-sided adhesive tape and an adhesive layer are not required, the structure is simplified, and the cost can be reduced. Further, at least a part of the outer edge portion of the outer shape of the crimping fastener first piece is an edge portion having a predetermined width by heat welding, so that the bonding strength to the ear piece-like portion is improved and the outer edge portion is hardly turned over. . In addition, if the outer edge portion is an edge portion, the fastener function portion is not exposed, and there is not much rough feeling even if it touches the hand, and even if it touches soft skin such as an infant, it is difficult to cause discomfort. The feeling of use is improved for both the caregiver and the care recipient (such as an infant).

  Although some examples have been described above, the present invention is not limited to these exemplifications, those examples are appropriately combined within a range that does not cause technical contradiction, a certain part is replaced with a known technique, It goes without saying that various modified embodiments such as adding a well-known technique can be implemented, and such embodiments are also included in the technical scope of the present invention.

1 disposable paper diapers (pants)
2 Front part 3 Rear part 4 Protruding part 5 on both sides Fastener member 6 Ear piece-like part 7 Crimp fastener first piece 8 Crimp fastener second piece 12 Fixing part 13 Edge part 13A Transverse edge border part 15 First continuous sheet (ear piece) (Continuous sheet that becomes the shape part)
17 Second continuous sheet (continuous sheet to be the first piece of crimped fastener)
18 laminated sheet 20 ultrasonic horn 21 pattern roll 22 anvil roll 23 cutter roll 33 islands junction 35 switching disconnection 36 cutting line 38 edging 38A longitudinal border pattern section

Claims (2)

In the manufacturing method of the crimping fastener part in the pants body which extends back and forth through the wearer's crotch part, and the front part and the rear part are detachably joined by the crimping fastener,
It is laminated and fixed to an ear piece having thermoplasticity protruding from one side edge of the front part and the rear part, and removably joined to the second piece of the crimping fastener fixed to the other of the front part and the rear part. When forming the first crimped fastener piece with thermoplasticity, the belt-like continuous sheet serving as the first crimped fastener piece is replaced with the intermediate portion in the width direction of the strip- like continuous sheet serving as the wider ear piece-like portion. In addition, a heat welding step of stacking and fixing by partially heat-welding in a part of the area of the fastener function part of itself,
Both sides of the continuous sheet that becomes the first piece of the crimping fastener intersect with each other and protrude to the outside to reach the region of the continuous sheet that becomes the ear piece-like portion, and then turn on both sides of the continuous sheet that becomes the first piece of the crimping fastener again. The laminated sheet is cut by a continuous cutting line that repeats the amplitude of a one-stroke letter intersecting with the continuous sheet that is the first piece of the crimping fastener and the continuous sheet that is the ear piece-like portion, and the laminated sheet Cutting step by cutting the continuous cutting line,
A dividing step of further dividing the cut laminated sheet into a plurality of pieces so as to correspond to the individual ear pieces,
A fixing step of fixing the divided individual laminated sheets as fastener members to one of the front part and the rear part of the pant body to form the ear piece-like part with the first piece of the crimping fastener,
Including
In the thermal welding step, the continuous sheet serving as the first crimping fastener piece and the continuous sheet serving as the ear piece-like portion are thermally welded by ultrasonic waves at a plurality of locations distributed in an island shape, and other ultrasonic waves as a heat weld portion formed by the crimping fastener transverse border pattern unit repeating the transverse longitudinal border both side edges of the pattern portion and its band-shaped along both side edges of the continuous sheet comprising a first strip, or the crimp fastener first the transverse border pattern unit repeating the crossing of both side edges of the continuous sheet as a one-piece, are included,
In the cutting step, the crimping fastener first piece is formed such that the continuous cutting line passes through the middle of the transverse border pattern portion in the width direction and the transverse border pattern portion is divided on both sides of the cutting line. A method for manufacturing a pressure-bonded fastener part in a pressure-bonded fastener-jointed pant body, comprising cutting an integrated laminated sheet of a continuous sheet and a continuous sheet serving as an ear piece-like part. In the manufacturing apparatus of the crimping fastener part in the pants body that extends back and forth through the wearer's crotch part and the front part and the rear part are detachably joined by the crimping fastener,
It is laminated and fixed to an ear piece having thermoplasticity protruding from one side edge of the front part and the rear part, and removably joined to the second piece of the crimping fastener fixed to the other of the front part and the rear part. When forming the first crimped fastener piece with thermoplasticity, the belt-like continuous sheet serving as the first crimped fastener piece is replaced with the intermediate portion in the width direction of the strip- like continuous sheet serving as the wider ear piece-like portion. In addition, a thermal welding device that stacks and fixes by partially thermally welding in a part of the area of the fastener function portion of itself,
Both sides of the continuous sheet that becomes the first piece of the crimping fastener intersect with each other and protrude to the outside to reach the region of the continuous sheet that becomes the ear piece-like portion, and then turn on both sides of the continuous sheet that becomes the first piece of the crimping fastener again. A continuous cutting line that repeats the amplitude of a one-stroke letter that intersects with the continuous sheet that is the first piece of the crimping fastener and the continuous laminated sheet that is the ear piece-like portion is cut, and the laminated sheet is A cutting device for cutting along the continuous cutting line;
A cutting device that further cuts the cut laminated sheet into a plurality of pieces so as to correspond to the individual ear pieces,
A fixing device for fixing the divided laminated sheets as fastener members to one of the front part and the rear part of the pant body to form the ear piece-like part with the first piece of the crimping fastener,
Including
In the thermal welding apparatus, the continuous sheet serving as the first crimping fastener piece and the continuous sheet serving as the ear piece-like portion are thermally welded by ultrasonic waves at a plurality of locations distributed in an island shape, and other ultrasonic waves as a heat weld portion formed by the crimping fastener transverse border pattern unit repeating the transverse longitudinal border both side edges of the pattern portion and its band-shaped along both side edges of the continuous sheet comprising a first strip, or the crimp fastener first the transverse border pattern unit repeating the crossing of both side edges of the continuous sheet as a one-piece, are included,
In the cutting apparatus, the crimping fastener first piece is formed such that the continuous cutting line passes through the middle in the width direction of the transverse border pattern portion and the transverse border pattern portion is divided on both sides of the cut line. An apparatus for manufacturing a pressure-bonded fastener portion in a pressure-bonded fastener-jointed pant body, characterized in that cutting is performed on an integrated laminated sheet of a continuous sheet and a continuous sheet serving as an ear piece-like portion.

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