JP4012865B2 - Method for producing disposable pants-type diapers - Google Patents

Description

  The present invention relates to a method for manufacturing a disposable pants-type diaper, and particularly to a method for manufacturing a disposable pants-type diaper whose crotch portion can be freely opened and closed.

  Disposable diapers are broadly divided into flat diaper developed bodies, unfolded diapers that can be worn by binding the left and right wings and the crotch part at the time of use, and pants-type diapers in the shape of pants. The pants-type diaper has been popularized in recent years because it has the advantage that the wearing operation can be easily performed in a standing posture and that it can be worn as an underwear sensation and the resistance is relatively small for adult wearers.

  By the way, when replacing the pants-type diapers, you must take off the trousers and tights worn on the outside, replace the dirty pants-type diapers with new pants-type diapers, and wear the pants again. Since it must be done, it takes time to replace it.

  Therefore, Patent Document 1 proposes a pants-type diaper that can be freely opened and closed. Specifically, FIGS. 12 to 14 [FIG. 12 is a perspective view of a conventional disposable pant-type diaper (part 1) 77. 13 is a longitudinal section thereof, and FIG. 14 is a perspective view for explaining the wearing procedure. As shown in FIG. 13, the pant-type diaper 77 includes a lower piece 72 of the front body 71 and a lower piece 74 of the rear body 73. The hook-shaped member 79 is engaged with the loop-shaped member 78, and when the lower pieces 72, 74 are engaged, a pair of left and right leg openings 53 are formed. When the lower pieces 72 and 74 are disengaged, the left and right leg-hole openings 53 become a continuous opening 76 (that is, the diaper has a cylindrical shape). The front and rear bodies 71 and 73 (particularly the portions of the lower pieces 72 and 74) are provided with absorbers 75, respectively.

  When the pant-type diaper 77 is worn, the pant-type diaper 77 is pulled up to the waist through the pant-type diaper 77 with the crotch portion opened from the top of the trousers or the like that has been lowered to below the knee (FIG. 14), and then the crotch portion of the diaper is closed. (FIGS. 12 and 13) The above-described trousers and the like are pulled up, and it is not necessary to completely remove the trousers and the like, which saves the trouble of replacement. When removing the pants-type diaper 77, the left and right side line joints (side line part 51) are peeled off, and the diaper 77 can be pulled out from the wearer's crotch.

  In addition, in Patent Document 2, as a pants-type diaper whose crotch portion can be freely opened and closed, the front side (abdominal side) position from the crotch is the joint of the lower end portions 62b, 62c, 63b, 63c of the front and back bodies, A first lower engagement area 64 is provided on the skin side surface of the lower end part 62 b of the front body 62, and a first upper engagement area 65 is provided 62 c above the first lower engagement area 64, and the lower end part of the rear body 63 A second engagement area 66 is provided on the skin side surface of 63b, and a third engagement area 67 is provided on the outer surface of the back body 63, which is 63c above the second engagement area 66 (see FIG. 16: Perspective view of a conventional disposable pants-type diaper (No. 2), FIG. 17: AA line sectional view shown in FIG.

When wearing, the lower part of the front body 62 is rolled up to engage the first upper engagement area 65 and the second engagement area 66 on the skin side of the rear body 63 (FIG. 15: conventional disposable pants-type diaper 2) is a perspective view for explaining the wearing procedure), and then folds back the lower end portion 63b of the rear body 63 (the portion where the second engagement area 66 exists) and returns the front body 62 that has been raised up. The first lower engagement area 64 of the front body 62 and the third engagement area 67 of the outer surface of the rear body 63 are engaged (FIGS. 16 and 17).
Japanese Patent Laid-Open No. 9-566 (particularly FIGS. 1 to 3, paragraphs [0011] and [0023]) JP 2001-252304 A

  The pants-type diaper with the crotch part openable and closable as described above has the advantage that it can be worn just by sliding down without completely removing the outer garment such as trousers. The manufacturing method is not shown in Patent Documents 1 and 2, and in order to enable mass production, it is desired to realize a continuous manufacturing method.

  Then, an object of this invention is to provide the method of manufacturing continuously the disposable underpants type diaper which can open and close a crotch part.

  In the following description of the present invention, the reference numerals used in the drawings to be described later will be added as appropriate for the sake of understanding, but the present invention is not limited to the examples shown in the drawings.

In the manufacturing method of the disposable pants-type diaper according to the present invention, the front body 41 includes an abdomen piece 42 and a lower piece 43 (hereinafter sometimes referred to as a front body lower piece) 43, and the rear body 44 is a back piece 45. And a lower piece (hereinafter sometimes referred to as a lower lower piece) 46, and the abdomen piece 42 and the back piece 45 are joined by a side line portion 51, and a waist opening 52 at the upper edge thereof. And a lower piece 43 following the abdomen piece and a lower piece 46 following the back piece are detachably attached to each other to form a pair of left and right leg openings 53, in the vicinity of the waist opening. And elastic members (elastic members 10, 11, 12, etc.) are arranged in the vicinity of the opening around the legs, respectively, and the front body sheet member and the back body sheet member are laminated. 2 sheets 27 , 27b, 28a, the disposable pants-type diaper which is formed respectively at 28b, to a method of continuously producing while traveling in the diaper lateral direction (left or right),
The corresponding attachment / detachment region (for example, the second engagement) corresponding to the raw material fabric 127a of the first front body sheet (front interior sheet 27a) and the raw material fabric 128a of the first rear body sheet (rear exterior sheet 28a). An attachment / detachment member attaching step of providing an attachment / detachment member that makes the both attachment / detachment regions attachable / detachable to at least one of the joint region 14 and the third engagement region 34);
The raw material fabric 127a of the first front body sheet and the raw material fabric 128a of the first back body sheet are supplied so as to partially overlap each other, and a portion in the opening around the leg (temporary joint 35) in the overlapping portion A temporary joining step of joining with,
Between the raw material 127b of the second front body sheet (front exterior sheet 27b) and the raw material 127a of the first front body sheet, and the raw material of the second rear body sheet (rear interior sheet 28b). A leg-circular elastic member disposing step of sandwiching the elastic member at a position near the leg opening between 128b and the raw material portion 128a of the first back body sheet;
The elastic member is sandwiched by one or both of the first and second front body sheet raw materials 127a and 127b, and either of the first and second rear body sheet raw materials 128a and 128b. Alternatively, a waist circumference elastic member arranging step for sandwiching the elastic member by both,
An absorbent body arranging step of placing the absorbent member 18 at the position of the crotch of the diaper;
Legs for cutting off the opening around the leg in each raw material after the attaching / detaching member attaching step, the temporary joining step, the leg circumferential elastic member arranging step, the trunk circumferential elastic member arranging step, and the absorber arranging step. And a peripheral opening forming step.

  By the above method, the disposable pants-type diaper which can freely open and close the crotch portion can be manufactured industrially continuously.

  Moreover, since the first front body sheet raw material 127a and the first back body sheet raw material 128a are joined by the temporary joining step, the first front / rear body material material 127a, Since 128a flows together, traveling is stabilized.

  In addition, the manufacturing process after the temporary joining step can be performed in substantially the same manner as the manufacturing method of a normal disposable pants-type diaper (hereinafter sometimes referred to as a normal pants-type diaper) that cannot open the crotch portion. Existing manufacturing equipment can be used.

  In other words, the normal pants-type diaper manufacturing method is performed by first forming the left and right side line portions in an open state and then folding the diaper up and down in the final stage of the manufacturing process to join the left and right side line portions. In other words, various parts are attached to a long sheet that is not divided into a front body and a back body. However, even if this manufacturing method is applied to disposable pants-type diapers that can be opened and closed at the crotch part, the front and rear bodies are separated when the left and right side lines are not attached. There is a risk of becoming stable. However, in the present invention, since the raw material side 127a on the front body side and the raw material side 128a on the back body side are joined and integrated after the temporary joining step, the existing equipment for manufacturing a normal pant-type diaper is almost Available. Therefore, it is not necessary to introduce new equipment, and there is an effect that industrial production is possible without much equipment cost.

  And since the location joined in the temporary joining step (temporary joined portion 35) is a portion that is excised in order to open the leg periphery opening in the leg circumferential opening forming step, even in the joined location (temporary joined portion 35). Even if it is strongly bonded, there is no problem with the finished product. However, when joining the joint location (temporary joint portion 35) to such an extent that it can be peeled off, the joint location (temporary engagement portion 35) may protrude from the excision range (leg opening portion 36). In this case, at the time of use of the product, it is only necessary to peel the joint portion (provisional engagement portion 35) of the protruding portion and open the crotch portion. Further, it may be strongly joined in the excision range (leg opening portion 36), and may be joined so as to be peelable in the portion protruding from the excision range.

  In addition, in this invention, you may perform each process of the said attachment / detachment member attachment process, a temporary joining process, a leg periphery elastic member arrangement | positioning process, a trunk periphery elastic member arrangement process, and an absorber arrangement | positioning process in any order.

  However, it is preferable to perform the temporary joining process at the earliest possible manufacturing stage because the utilization ratio of existing normal pant-type diaper manufacturing equipment can be increased.

  Moreover, the said leg periphery elastic member arrangement | positioning process may be performed with respect to each of the front body side and the back body side, and the said temporary joining process may be performed after that, and the said trunk periphery elastic member arrangement process and the said absorber arrangement | positioning process may be performed after that. . In this case, it is easy to introduce the leg elastic members on the front body side and the back body side with different materials and control conditions (for example, extension force, trajectory). Furthermore, different sheet materials can be easily formed under different control conditions on the front body side and the back body side.

  Alternatively, the leg circumference elastic member placement step and the waist circumference elastic member placement step may be performed on each of the front body side and the back body side, then the temporary joining step, and then the absorber placement step. . As above, leg elastic members can be easily introduced with different materials and control conditions (for example, stretching force, trajectory) on the front body side and the back body side, and different sheet materials are used on the front body side and the back body side. It becomes easy to form under the controlled conditions.

  In the attaching / detaching member attaching step, “providing an attaching / detaching member in at least one of the corresponding attaching / detaching areas” means that a pair of attachable / detachable members are attached to the first front / rear body material material 127a, 128a. It means that each is attached, or a detachable detachable member is attached to only one side. As a representative example of the detachable member, a mechanical engagement member such as a hook-and-loop fastener is given as a representative example. In the female engagement member of the mechanical engagement member, the first front body is used. When a nonwoven fabric or a knitted fabric that can be engaged with the male engagement member is used as the sheet or the first back body sheet, the first front and back body sheets themselves serve as the female engagement member. Therefore, it is not necessary to attach a female engagement member. Therefore, in such a case, the male engagement member may be attached to only one of the first front / rear body sheet materials 127a and 128a.

  The disposable pants-type diaper manufactured according to the present invention includes an outer sheet of the first and second front body sheets 27a and 27b and the first and second rear body sheets 28a and 28b. Using a liquid-impervious sheet (becomes a back sheet), using a liquid-permeable sheet (becomes a top sheet) for the skin side (inner side) sheet, and sandwiching an absorbent member between them (a sandwich type) Or on the front body sheet member (the first and second front body sheets 27a and 27b) and / or the rear body side sheet member (the first and second rear body sheets 28a and 28b). Alternatively, a type (separate type) on which the absorbent member 18 is placed may be used. In the case of a separate mounting type, it is preferable to use a member having a liquid-permeable top sheet and a liquid-impermeable back sheet as the absorbent member itself.

  By the way, the manufacturing method of the present invention is not only capable of continuously manufacturing a pants-type diaper having a single set of detachable areas in the crotch portion as in the conventional disposable pants-type diaper (part 1) 77, but also detachable. Even when the pair of areas is a pants-type diaper, it can be manufactured continuously.

Regarding a manufacturing method of the pants-type diaper having these two sets of attachment / detachment areas, a more preferable aspect will be described.
In the present invention, a lower piece (front piece lower piece) 43 following the abdomen piece 42 is hung so as to be located on the front side, and a skin side piece hung so as to be located on the skin side. 17, the first attachment / detachment region 13 is provided on the outer surface of the skin-side piece 17, and the second attachment / detachment region 14 is provided on the skin side surface of the outer piece 48,
A lower piece (rear lower piece) 46 following the back piece 45 includes the rear body sheet member and the absorbent member 18, and the lower lower piece (lower piece following the back piece). The outer surface 46 has a third attachment / detachment region 34 that can be attached to and detached from the second attachment / detachment region 14, and the skin side surface of the absorbent member 18 of the lower back piece (a lower piece following the back piece) 46 of the rear body 46. A method for producing a pant-type diaper having a first detachable area 13 and a detachable fourth detachable area 16,
In the attachment / detachment member attaching step, the attachment / detachment region of the first front body sheet on the material fabric 127a is the second attachment / detachment region, and the attachment / detachment region of the first back body sheet on the material fabric 128a is the third attachment / detachment. And
Moreover, the said absorber arrangement | positioning process arrange | positions the said absorptive member 18 with respect to the raw material fabric 128a, 128b of the said 1st, 2nd back body sheet | seat,
An attachment / detachment member capable of attaching / detaching these attachment / detachment regions to / from at least one of the attachment / detachment regions (first engagement region 13 and fourth male engagement member 16) corresponding to each other of the skin side piece 17 and the absorbent member 18. (For example, a fourth male engaging member 16) first and fourth attaching / detaching member attaching steps;
After the absorbent body arranging step and the first and fourth attaching / detaching member attaching steps, the raw material of the skin side piece 17 is changed to the raw material of the absorbent member 18 and the first and second front body sheets 127a and 127b. It is preferable to include a skin-side piece placing step for placing on the skin.

  Thereby, as above-mentioned, the front body lower piece 43 has the two pieces of the outer side piece 48 and the skin side piece 17, and can manufacture the disposable pants type diaper provided with the 1st-4th attachment / detachment area.

  Further, in the first and fourth attachment / detachment member attaching steps, it is preferable to form an attachment / detachment member (fourth male engagement member 16) in the fourth attachment / detachment region of the absorbent member 18. In the case where the detachable member is provided in one of the first and fourth engagement areas, the detachable member is formed in the absorbent member 18 as compared with the case where the detachable member is formed in the first detachable area of the skin side piece 17. This is because it is easier to position the detachable member (fourth male engagement member 16) in the fourth detachable region.

  In addition, in the skin side piece placing step, as the raw material material 117 of the skin side piece 17, a sheet 29, 49 provided with the shape retaining member 15 and / or the skin side piece elastic member 31 in advance is used. Is preferably placed on the raw material of the absorbent member 18 and the first and second front body sheets 27a, 27b. According to this manufacturing method, since the raw material of the skin-side piece 17 provided with the shape-retaining member 15 and the skin-side piece elastic member 31 is previously placed on the absorbent body 18, the absorbent body 18 It is easy to position the shape-retaining member 15 with respect to.

  As described above, according to the manufacturing method according to the present invention, the disposable pants-type diaper whose crotch portion can be freely opened and closed can be continuously manufactured, and industrially mass-produced.

<Embodiment 1>
1 and 2 are diagrams for explaining a method for producing a disposable pant-type diaper according to Embodiment 1 of the present invention, and represent a diaper production line. The diaper production line proceeds in the lateral direction of the finished diaper product (transverse flow method) and flows from the left side to the right side in FIGS. Further, in the first embodiment, the above-described separately mounted type (a type in which the absorbent member 18 is placed on two front body sheets and two rear body sheets), and a single-use disposable pants type with a removable area. Diapers will be obtained. In the following description of the positional relationship, the upper side in the drawing may be referred to as the upper side and the lower side may be referred to as the lower side.

  In manufacturing, as shown in FIG. 1, first, while supplying the second front body sheet raw material 127b to the first front body sheet raw material 127a, between the raw material material 127a and the raw material material 127b. And adhering them with an adhesive with the thread-like front leg elastic member 11 sandwiched between them [front leg elastic member arrangement step on the front body side]. On the other hand, the second back body sheet raw material 128b is supplied to the first back body sheet raw material 128a, and the yarn-like front leg elastic member 12 is sandwiched between the raw material material 128a and the raw material material 128b. Adhering with an agent [the leg elastic member arrangement step on the back body side]. At this time, the leg elastic members 11 and 12 are arranged so as to swing along the leg opening.

  Next, a second male engagement member (second attachment / detachment region) 14 (detachment member) is adhered with an adhesive near the upper side edge in the drawing of the first front body sheet material fabric 127a [attachment / detachment member attachment Process]. The second male engaging member 14 may be attached by heat sealing or ultrasonic bonding.

  Subsequently, the first front body sheet raw material 127a-second front body sheet raw material 127b laminated sheet (front body sheet member 127), and the first rear body sheet raw material 128a-second rear body. As shown in the drawing, the sheet material anti-128b laminated sheet (sheet member 128 for the back body) is partly overlapped, and this overlapped part and the part that becomes the leg opening 53 when it becomes a product and its vicinity Then, the front and rear body sheet members 127 and 128 are joined by heat fusion [temporary joining step]. This joint location is referred to as a temporary joint portion 35. The bonding strength of the temporary bonding portion 35 is set such that a person can peel it by hand.

  Then, the absorbent member 18 (with the absorbent core sandwiched between the top sheet and the back sheet) is placed at the crotch position of the diaper of the front and rear body sheet members 127 and 128, and the rear body sheet Adhering to the member 128 with an adhesive [absorber arrangement step].

  Next, as shown in FIG. 2, while supplying the thread-like elastic member 10 for the waist, the lower end portion of the second front body sheet material fabric 127b (upper waist portion as a diaper product), and the first The upper end portion of the back body sheet raw material 128a (the upper waist portion of the diaper product) is folded back (arrow G) and bonded with the waist elastic member 10 in between [the waist circumference elastic member arranging step].

  Then, the leg periphery opening part 36 in the sheet | seat members 127 and 128 for front and back bodies is excised [a leg periphery opening formation process]. By this step, the leg periphery opening 53 is formed, and the temporary joint portion 35 in the opening 53 is removed. However, in the first embodiment, the temporary joint portion 35 that is removed from the leg opening portion 36 remains without being cut, but this temporary joint portion 35 is merely joined to the extent that it can be peeled by hand. Therefore, when wearing the finished product diaper, it can be peeled off to easily open the crotch. In addition, it is preferable that the temporary joining portion 35 is left without being removed as described above because the integrity of the sheet can be continuously reinforced in the subsequent steps. Note that the leg opening portion 36 refers to a sheet in the opening before the leg opening 53 is opened. In the drawing, 36a indicated by a two-dot chain line is a planned cutting line.

  Subsequently, the width direction of the flow of the diaper production line is folded in half (arrow F), and the portion corresponding to the side line portion 51 of the pant-type diaper is joined to the extent that it can be peeled by hand. It cut | disconnects by the cutting line 82 between the two adjacent side line parts 51, and isolate | separates into each underpants type diaper.

  The disposable pants-type diaper obtained as described above has a crotch portion that can be freely opened and closed. Specifically, a second male engagement member (hook engagement member) 14 provided on the lower piece of the front body. And the part of the lower part of the back body facing this (the outer surface of the back part of the lower part of the back body is made of a non-woven fabric having a function as a female engaging member). It can be opened and closed. When the crotch portion is opened, the absorbent member 18 is connected to the back body side as a part of the back body. This is because the absorbent member 18 is bonded to the back body sheet member 128 as described above.

  Thus, according to Embodiment 1, the disposable pants-type diaper which can open and close the crotch portion can be continuously manufactured. Further, in the manufacturing process, the front and rear body sheet members 127 and 128 are integrated by the temporary joining portion 35, so that both the sheet members 127 and 128 travel stably. The temporary joint 35 is mostly cut off in the process of forming the leg circumference at the end of the manufacturing process, and the temporary joint 35 remaining without being cut is a joint that can be peeled off by hand. There is no hindrance in use.

<Embodiment 2>
Embodiment 2 of the manufacturing method of the disposable pants-type diaper according to the present invention will be described below. First, the configuration of the disposable pants-type diaper 50 manufactured in Embodiment 2 will be described. The pants-type diaper 50 includes the above-described separately mounted type (front body sheet members (the first and second front body sheets 27a and 27b) and rear body sheet members (the first and second rear body sheets 28a). 28b) is a type in which the absorbent member 18 is placed on top of each other), and there are two sets of the above-mentioned detachable areas, and engaging / detaching engagement members are used for these groups of detachable areas. .

  FIG. 3 is a front view showing the disposable pants-type diaper 50, and FIG. 4 is a cross-sectional view taken along line B-B shown in FIG. 5 and 6 are front views for explaining the wearing procedure of the disposable pants-type diaper 50, and FIG. 7 is a skin side view showing a state where both side line portions 51 of the disposable pants-type diaper 50 are removed and deployed. FIG. 8 is a cross-sectional view taken along the line CC shown in FIG. 7, and FIG. 9 is a cross-sectional view taken along the line DD shown in FIG.

  The pant-type diaper 50 is composed of a front body 41 and a back body 44, the front body 41 is composed of an abdomen piece 42 and a front body lower piece 43, and the back body 44 is a back piece 45 and a rear piece lower piece. 46.

  The lower back piece 46 includes a rear lower piece sheet 47 continuous from the back piece 45 and an absorbent member 18, and the absorbent member 18 is formed on the skin side surface of the lower lower piece sheet 47 with its bottom end 47 e. It is positioned so as to protrude beyond a little. The absorbent member 18 and the lower back piece 47 of the back body are fixed by an adhesive 32. The rear body lower piece 46 has a length extending from the wearer's crotch to the lower part of the abdomen.

  The back piece 45 and the lower back piece 47 are formed by laminating a continuous sheet of a rear interior sheet (second rear body sheet) 28b and a rear exterior sheet (first rear body sheet) 28a. The rear leg elastic member 12 is bonded between the sheets 28b and 28a. Further, the edge of the rear exterior sheet 28a is folded back and the elastic member 10 for waist is sandwiched and bonded. The rear exterior sheet 28a is made of a non-woven fabric that can be engaged with a male engaging member (second attachment / detachment region) 14 (for example, a hook engaging member) described later. Examples of the nonwoven fabric include a spunbond nonwoven fabric, a point bond nonwoven fabric, an air-through nonwoven fabric, and the like, as long as it can be engaged with the male engagement member 14. In addition, the lower part of the lower body lower piece sheet 47 in the rear exterior sheet 28a is a third attachment / detachment region (third engagement region 34).

  The absorbent member 18 has a liquid-permeable top sheet 20 on the skin side and a liquid-impermeable back sheet 21 on the outside, and an absorbent core (absorber) 19 sandwiched between the sheets 20 and 21. Further, side edge mounting sheets 26 are attached to both side edges of the absorbent member 18 in the longitudinal direction, and the crotch elastic member 25 is disposed so as to be sandwiched between the side edge mounting sheets 26. ing. Further, a liquid-impervious side leakage prevention sheet 22 is attached to the skin side in the vicinity of both side edges of the absorbent member 18. The side edge 22a of the side leakage prevention sheet 22 is a free end, and a three-dimensional elastic member 24 is attached to the center side edge 22a (the elastic member 24 is arranged on the longitudinal side edge). Will be done).

  Further, a male engagement member 16 (for example, hook-type engagement member) is attached to both sides of the hanging end 46e of the side leakage prevention sheet 22 on the skin side surface. These two male engagement members 16 become a fourth attachment / detachment region. The engaging member 16 may be referred to as a fourth male engaging member 16.

  The front body lower piece 43 of the front body 41 is divided into two pieces, a skin side piece 17 and an outer piece 48, the skin side piece 17 is shorter than the outer piece 48, and the outer piece 48 is the outer surface of the skin side piece 17. The skin side piece 17 is hidden from the appearance. The abdomen piece 42 and the outer piece 48 are configured by laminating a series of sheets of a front interior sheet (first front body sheet) 27a and a front exterior sheet 27b, and the front side between these sheets 27a and 27b. The leg elastic members 11 are bonded so as to be sandwiched. Further, the edge of the front exterior sheet (second front body sheet) 27b is folded back and the elastic member 10 for waist is sandwiched and bonded.

  The male engagement member 14 is attached to the skin side surface in the vicinity of the hanging end 48e of the outer piece 48. This male engagement member 14 becomes a second attachment / detachment region. The engaging member 14 may be referred to as a second male engaging member 14.

  The skin-side piece 17 is formed by using a shape-retaining member 15 having water absorption (for example, a material having the same material as the absorbent core 19 and having a small size) and a skin-side skin-side sheet 29 on the skin side and the outer skin. The side piece outer sheet 49 is sandwiched between the skin sheet 29 and the upper end portion 17u of the outer sheet 49 so that the abdomen piece 42 is connected. The position of the shape retaining member 15 on the skin side piece 17 is the center in the left-right direction and the lower part in the height direction. The skin sheet 29 is liquid permeable, and the skin side outer sheet 49 is made of a nonwoven fabric with which the fourth male engaging member 16 can be engaged. As the non-woven fabric, a spunbond non-woven fabric and the like can be mentioned in the same manner as described above, and it is only necessary that the non-woven fabric can be engaged with the fourth male engagement member 16. In addition, the location where the shape-retaining member 15 is located in the skin-side piece outer sheet 49 is a first attachment / detachment region (first engagement region 13). Further, thread-shaped skin-side piece elastic members 31 are arranged on both the left and right sides of the shape-retaining member 15 so as to be sandwiched between the skin-side one-side skin sheet 29 and the skin-side one-side outer sheet 49 in the left-right direction. The skin surface sheet 29 and the skin side piece outer surface sheet 49 may be composed of a continuous sheet, and the shape retaining member 15 and the skin side piece elastic member 31 may be sandwiched between the sheets.

  The positional relationship in the height direction between the first engagement area 13 and the second male engagement member 14 is that the second male engagement member 14 is positioned below the first engagement area 13. When these are engaged with the third engagement area 34 and the fourth male engagement member 16, the two engagements do not overlap in the thickness direction.

  The upper part of the abdomen piece 42 and the lower part 43 of the front body 41 and the back part 45 of the back body 44 are joined to each other by the left and right side line parts 51 so that the abdomen piece 42 and the back piece 45 can be separated. A waist opening 52 is formed at the upper edge. A pair of left and right openings formed when the front body lower piece 43 and the rear body lower piece 46 are engaged with each other serve as the leg periphery openings 53. The waist elastic member 10 fits around the waist, and the front leg elastic member 11 of the front body 41 and the rear leg elastic member 12 of the rear body 44 and the crotch elastic member 25 are used for leg rotation. Is designed to fit. Moreover, the said side line part 51 is joined to such an extent that it is not torn when peeled off and torn by hand when removed after use, like a normal disposable pants-type diaper whose crotch portion cannot be opened. .

  Next, an example of a method for manufacturing the disposable pants-type diaper 50 will be described.

  10 and 11 are diagrams for explaining a method for producing a disposable pant-type diaper according to Embodiment 2 of the present invention, and represent a diaper production line. The diaper production line proceeds in the lateral direction of the finished diaper product (transverse flow method), and flows from the left side to the right side in FIGS. Regarding the correspondence between the raw material in the manufacturing process and each sheet of the finished product (diaper 50), the first front body material 127a is the front interior sheet 27a, and the second front body material 127b is the front. The exterior sheet 27b, the first back body sheet raw material 128a becomes the rear side exterior sheet 28a, and the second rear body sheet material material 128b becomes the rear side interior sheet 28b.

  First, as in the first embodiment, the leg elastic member arranging step, the detachable member attaching step, and the temporary joining step are performed.

  On the other hand, as the absorbent member 18, the absorbent core 19 is sandwiched between the top sheet 20 and the back sheet 21, and the side edge mounting sheet 26 with the crotch elastic member 25 sandwiched between the both side portions (leg-feeding portions); A material in which the side leakage prevention sheet 22 with the three-dimensional elastic member 24 is sandwiched is produced. In addition, the manufacturing method of this absorptive member 18 is the same as that of the past. Further, the fourth male engaging member 16 is bonded to the skin side surface at both corners of one side of the absorbent member 18 (corresponding to the hanging end 46e of the side leakage preventing sheet 22 in the finished product (diaper 50)) [ First and fourth attachment / detachment member attaching steps]. Since both corners of one side of the absorbent member are where there are few steps in the sheet, it is easy to position the fourth male engagement member 16.

  The absorbent member 18 provided with the fourth male engagement member 16 is placed at the crotch position of the diaper in the front and rear body sheet members 127 and 128 after the temporary joining step, and the rear body sheet member Adhere to 128 (laminated sheet of raw material 128a, 128b) with an adhesive [absorber arrangement step].

  Next, as the raw material material 117 of the skin side piece 17, a sheet 29 and 49 previously sandwiched between the shape retaining member 15 and the skin side piece elastic member 31 is used, and this skin side piece material material 117 is placed on the absorbent member 18. In addition, it is placed on the front body sheet member 127 (the laminated sheet of the first and second front body sheet raw materials 127a and 127b), and at the lower end edge (upper end portion 17u as a diaper product) in the figure. Adhering with an adhesive [skin-side piece placement step].

  Then, as shown in FIG. 11, while supplying the thread-like elastic member 10 for the waist as in the method of the first embodiment, the lower end portion of the second front body sheet raw material 127b (the upper end of the diaper product is the upper end). (Upper waist part) and the upper end part (upper waist part of the diaper product) in the drawing of the first back body sheet raw material 128a are folded back (arrow G), and the waist elastic member 10 is sandwiched between them. [A waist circumference elastic member arrangement process], Next, the leg circumference opening part 36 in the front and back body sheet members 127, 128 is cut out to form the leg circumference opening 53 [Leg circumference opening formation process]. By this step, the temporary joining portion 35 in the leg-hole opening 53 is removed. Thereafter, the width direction of the flow of the diaper production line is folded in half (arrow F), and the portion corresponding to the side line portion 51 of the pants-type diaper is joined to the extent that it can be peeled by hand, and then the two adjacent It cut | disconnects by the cutting line 82 between the side line parts 51, and isolate | separates into each underpants type diaper 50.

  As described above, the disposable pants-type diaper 50 (pants-type diapers having two sets of detachable areas (first to fourth detachable areas)) shown in FIG. 3 is continuously manufactured. Further, according to the above manufacturing method, since the front and rear body sheet members 127 and 128 are integrated by the temporary joint portion 35, both the sheet members 127 and 128 travel stably. The temporary joint 35 is mostly cut off in the process of forming the leg circumference at the end of the manufacturing process, and the temporary joint 35 remaining without being cut is a joint that can be peeled off by hand. There is no hindrance in use.

  Although the manufacturing method of the disposable pants-type diaper according to the present invention has been specifically described with reference to the drawings showing examples, the present invention is not limited to the illustrated examples but can be adapted to the above-mentioned purpose. It is also possible to carry out by appropriately changing the range, and all of them are included in the technical scope of the present invention.

  For example, at the time of the temporary joining step, the second male engagement member is located at the third engagement area 34 on the skin side surface of the back body sheet member 128 (the surface on the first back body sheet material side 128a). 14 may be engaged. Alternatively, when the front body sheet member 127 and the back body sheet member 128 are partially overlapped, the third engagement area 34 and the second male engagement member 14 do not correspond to each other, that is, shift from the corresponding position. The sheet members 127 and 128 may be stacked. More specifically, in the example shown in FIGS. 1 and 2, the front body is such that the position of the third engagement area 34 in the back body sheet member 128 corresponds to the second male engagement member 14. Although the back body sheet member 128 is superimposed on the front sheet member 127, the front and back body sheet members 127, 128 may be stacked deeper or shallower than the corresponding positions. Even when manufactured in this way, when the finished pant-type diaper product is worn, there is no problem because the deeply overlapped or shallowly overlapped portion may be adjusted to an overlap suitable for wearing. In addition, it is good to determine the extent to which the front and rear body sheet members 127 and 128 overlap in consideration of the arrangement of the leg elastic members 11 and 12 and the arrangement of the absorbent member 18.

  In addition, in the above-described embodiment, the case where the temporary joining portion 35 is joined by heat fusion is shown. However, for example, the joining may be performed by ultrasonic adhesion or adhesion using a hot melt adhesive, and other adhesives or You may make it join using an adhesive.

  In the above embodiment, the absorbent main body 18 is mounted on the two first and second back body sheet materials 128a and 128b. However, the two first and second back body sheet materials 128a are attached. , 128b (absorbing type) may be used in which an absorption core is disposed between them. In this case, a liquid-permeable sheet is preferably used for the sheet material on the skin side (interior side) and a liquid-impermeable sheet is used for the sheet material on the outside (exterior side).

  Further, as the pant diaper to be manufactured, the abdomen piece 42 and the back piece 45 (or the front body 71, 62 and the back body 73, 63) (any position between the waist elastic member 10 and the leg elastic members 11, 12). (1) In the leg circumferential elastic member arranging step, at the same time as supplying and arranging the leg elastic members 11, 12, Alternatively, the elastic member for body fit is supplied and disposed in front of it, and is sandwiched and bonded between the raw material fabric 127a and the raw material fabric 127b, or between the raw material fabric 128a and the raw material fabric 128b, or (2) the waist elastic member arrangement In the process, the elastic member for body fitting is supplied at the same time as or before and after the elastic member 10 for waist is supplied and disposed, and the first front body sheet raw material 127a and the skin side piece 17 raw material 1 are supplied. 7 or between the first back body sheet material fabric 128b and the presser sheet laminated on the first back body sheet material 128b. However, it is also possible to use a narrow material such as the second front body sheet material 127b or the second back body sheet material 128b so as to prevent an increase in the number of stacked layers and increase the thickness.

  In addition, below, it demonstrates in more detail about the raw material of each component of the underpants type diaper manufactured by the said Embodiment 1, 2 grade | etc.,.

As the front interior sheet 27a (first front body sheet material anti-127a) and the rear interior sheet 28b (second rear body sheet material anti-128b), a spunbond nonwoven fabric, a melt blown nonwoven fabric, an SMS nonwoven fabric, a point bond nonwoven fabric, an air A non-woven material having air permeability such as a through non-woven fabric can be mentioned, and a spunbonded non-woven fabric having a crimped fiber is particularly suitable. Preferably 10~35g / m ² as a weight per unit area. Examples of the material include polypropylene, polyethylene, polyester, nylon, polyamide and the like, and may be a fiber composed of a single component of these, or a composite fiber having a core-sheath type or a split type arrangement. . In the case of a core-sheath fiber, the core position is decentered so that crimping can be easily performed when melt spinning and drawing. In addition, if the cross-sectional shape is irregular, it tends to be crimped due to air resistance when melt spinning and drawing. Among these, a fiber having a single component of polypropylene, a fiber having a deformed cross section and being crimped is more preferable. More preferably, the embossing pattern when the fibers are thermocompression bonded is 2.0 to 5.0 mm pitch, the embossing rate is 6.0 to 8.5%, and the diameter of each embossed portion is 0.2 to 1. 5 mm. Alternatively, it may be hydrophilized (a surfactant is applied, or hydrophilic fibers (rayon, cotton, etc.) are mixed slightly). By making it hydrophilic, it is possible to expect an effect of improving the touch when it comes into contact with the skin or absorbing sweat.

The front exterior sheet 27b (second front body sheet raw material 127b) and the rear exterior sheet 28a (first rear body sheet material 128a) are spunbond nonwoven fabric, meltblown nonwoven fabric, SMS nonwoven fabric (two meltblown nonwoven fabrics) Non-woven fabric material that is breathable and water-repellent, such as a non-woven fabric obtained by heat embossing sandwiched from both sides with a spunbond nonwoven fabric. Preferably, it is a water-repellent nonwoven material having a basis weight of 10 to 25 g / m ² . In particular, if a spunbond nonwoven fabric having crimped fibers or a bulky air-through nonwoven fabric is used for the rear exterior sheet 28a, the engagement with the second male engagement member 14 at the third engagement region 34 is achieved. It is preferable because it can be easily combined. Note that a non-woven fabric, a knitted fabric, or a woven fabric that can be engaged with the second male engaging member 14 may be separately provided only in a portion corresponding to the third engaging area 34.

As the skin side piece skin sheet 29 and the skin side piece outer sheet 49 of the skin side piece 17, a liquid permeable nonwoven material, for example, a nonwoven material using hydrophilic fibers such as cellulose, rayon, cotton, or hydrophobic fibers. Non-woven fabric materials that have been treated with surfactants to make them liquid-permeable (polypropylene, polyethylene, polyester, polyamide, nylon, etc.). Nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.) are used. In particular, as the skin-side single skin sheet 29, a liquid-permeable nonwoven fabric material (point bond nonwoven fabric, air) which is made liquid-permeable by treating the surface of hydrophobic fibers with a basis weight of 10 to 25 g / m ² with a surfactant. Through nonwoven fabrics, spunbond nonwoven fabrics, etc.) are preferably used. The skin-side outer sheet 49 is preferably a non-woven fabric that can be freely engaged with and disengaged from the fourth male engagement member 16 as described above. For example, a spunbond non-woven fabric having crimped fibers, or a bulky air-through sheet. Nonwoven fabrics are preferably used. Note that a non-woven fabric, a knitted fabric, or a woven fabric that can be engaged with the fourth male engaging member 16 may be separately provided only in a portion corresponding to the first engaging area 13.

  As the shape-retaining member 15, it is preferable to use an absorber as described above, such as a water-permeable nonwoven fabric or a polymer sheet in which a superabsorbent resin powder is sandwiched between tissue papers, an airlaid nonwoven fabric mainly composed of pulp fibers, or the like. A sheet-like absorber is most preferable.

The top sheet 20 is preferably a liquid-permeable nonwoven material such as a nonwoven material using hydrophilic fibers (cellulose, rayon, cotton, etc.) or hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.). Nonwoven materials that have been treated with a surfactant to make the surface liquid-permeable can be mentioned. Preferably, a nonwoven fabric material (point bond nonwoven fabric, air-through nonwoven fabric) in which the surface of a hydrophobic fiber having a basis weight of 10 to 25 g / m ² is treated with a surfactant to make it liquid-permeable is used.

Examples of the backsheet 21 include water-repellent nonwoven materials (spunbond nonwoven fabrics, melt blown nonwoven fabrics, SMS nonwoven fabrics, etc.), plastic films, and composite materials thereof. The plastic film may be breathable or non-breathable, but a breathable plastic film is desirable as a more preferred embodiment. A breathable polyethylene film having a basis weight of 15 to 40 g / m ² is more preferable.

  As the absorbent core 19, an absorbent core obtained by mixing a granular polymer water absorbent with a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber is coated with a paper sheet such as tissue paper or a liquid-permeable nonwoven sheet. Examples include absorbent bodies that are wrapped in a sheet and molded into a predetermined shape. In addition, for the purpose of allowing the wearer to walk or roll over, the shape can be retained in the hydrophilic fiber assembly or on the sheet by applying a predetermined shape retaining means (applying a hot melt adhesive, Or synthetic fibers may be mixed). Further, a sheet-like absorbent body (for example, an air-laid absorbent body) obtained by forming the fiber or the polymer water-absorbing body into a sheet shape may be formed into a predetermined shape (rectangular shape, hourglass shape, etc.).

Examples of the material of the side edge mounting sheet 26 and the side leakage prevention sheet 22 include air-permeable and water-repellent nonwoven materials such as spunbond nonwoven fabric, melt blown nonwoven fabric, and SMS nonwoven fabric. m ² water-repellent nonwoven material. Further, the side edge mounting sheet 26 may be a breathable plastic film or a composite material thereof.

  The elastic member 10 for the waist, the elastic member 11 for the front leg, the elastic member 12 for the rear leg, the elastic member 25 for the inseam, the elastic member 24 for the three-dimensional gather, and the elastic member for body fitting are generally used in disposable diapers. It is preferable to use the elastic elastic material used (the shape may be any of a thread, a string, or a film, specifically, a polyurethane thread, a polyurethane film, natural rubber, etc.). It is preferable that the sheet is stretched between sheets by a suitable attachment means such as hot melt adhesive, thermal adhesion, ultrasonic adhesion or the like (more preferably, a rubber-based hot melt adhesive is used as the attachment means). ). In the case of the elastic member 10 for the waist, it is preferable that a polyurethane yarn having a fineness of 700 to 2000 dtex is stretched and attached at a magnification of 2.0 to 4.0 times. In the case of the elastic member 12 and the crotch elastic member 25, it is preferable that a polyurethane yarn having a fineness of 300 to 1850 dtex is stretched and attached at a magnification of 1.1 to 3.0 times. In the case of the elastic member 24 for three-dimensional gathers, it is preferable to attach a polyurethane yarn having a fineness of 300 to 2000 dtex to a magnification of 1.1 to 4.0 times. In the case of an elastic member for body fitting, it is preferable that polyurethane yarn having a fineness of 300 to 2000 dtex is stretched and attached at a magnification of 1.1 to 5.0 times.

The pressing sheet may be a liquid-permeable nonwoven material or a water-repellent nonwoven material. In the case of a liquid-permeable nonwoven material, for example, hydrophilic fibers (cellulose, rayon, cotton, etc.) Non-woven fabric material using water or a non-woven material made hydrophobic by treating the surface of a hydrophobic fiber (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) with a surfactant (for example, applying a surfactant), or A breathable and water-repellent nonwoven material (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.) with only the inner surface made hydrophilic is used. Alternatively, a hydrophilic fiber (rayon, cotton, etc.) layer may be formed only on the inner surface to make the inner surface hydrophilic (when touching the skin, the touch is good and the effect of absorbing sweat can be expected). . Preferably, non-woven fabric materials (point bond non-woven fabric, air-through non-woven fabric, spun bond non-woven fabric, etc.) which are made liquid-permeable by treating the surface of hydrophobic fibers having a basis weight of 10 to 25 g / m ² with a surfactant. In the case of a water-repellent nonwoven material, a water-repellent nonwoven material such as a spunbond nonwoven fabric, a melt blown nonwoven fabric, or an SMS nonwoven fabric is used, and preferably has a basis weight of 10 to 25 g / m ² .

  In addition, as a joining method of each material, methods, such as adhesion | attachment with a hot-melt-adhesive agent, ultrasonic sealing, and heat joining, are mentioned. The hot melt adhesive may be appropriately selected from rubber-based, polyolefin-based, vinyl acetate-based hot-melt adhesives, and the adhesive may be applied while the adhesive discharge nozzle is in contact with the adhesive spray nozzle or curtain spray. Examples thereof include a method of applying a mesh by a non-contact coating method such as a melt blow method using a coater or a spiral spray method, and a bead coating method. About the side line part 51, joining by thermal joining is preferable.

It is FIG. (1) for demonstrating the manufacturing method of the disposable pants type diaper which concerns on Embodiment 1 of this invention. It is a figure (the 2) for demonstrating the manufacturing method of the disposable pants type diaper which concerns on Embodiment 1 of this invention. It is a front view which shows the disposable pants type diaper obtained with the manufacturing method which concerns on Embodiment 2 of this invention. FIG. 4 is a sectional view taken along line BB shown in FIG. 3. It is a front view (the 1) for demonstrating the wearing procedure of the disposable pants type diaper shown in FIG. It is a front view (the 2) for demonstrating the wearing procedure of the disposable pants type diaper shown in FIG. It is the figure from the skin side surface showing the state which removed the both sides line part of the disposable pants type diaper shown in FIG. 3, and developed. It is CC sectional view taken on the line shown in FIG. It is the DD sectional view taken on the line shown in FIG. It is a figure (the 1) for demonstrating the manufacturing method of the disposable pants type diaper which concerns on Embodiment 2 of this invention. It is FIG. (2) for demonstrating the manufacturing method of the disposable pants type diaper which concerns on Embodiment 2 of this invention. It is a perspective view of the conventional disposable pants type diaper (the 1). It is a longitudinal section of the conventional disposable pants type diaper (the 1). It is a perspective view for demonstrating the wearing procedure of the conventional disposable pants type diaper (the 1). It is a perspective view for demonstrating the wearing procedure of the conventional disposable pants type diaper (the 2). It is a perspective view of the conventional disposable pants type diaper (the 2). It is AA sectional view taken on the line shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Elastic member for waist 11 Elastic member for front leg 12 Elastic member for rear leg 13 First engagement area 14 Second male engagement member 16 Fourth male engagement member 17 Skin side piece 18 Absorbing member 34 Third engagement area 35 Temporary joint 36 Leg opening part 36a Planned cutting line 50 Pants-type diaper 51 Side line part 53 Leg opening 117 Skin side piece raw material 127 Front body sheet member 127a First front body sheet Raw material material 127b Second front body sheet material material 128 Rear body sheet member 128a First rear material material material 128b Second rear material material material 128

Claims (4)

The front body has an abdomen piece and a lower piece that follows it, the back body has a back piece and a lower piece that follows it, and the abdomen piece and the back piece are joined at the side line part and the waist around these upper edges An opening is formed, and a lower piece following the abdomen piece and a lower piece following the back piece are detachably attached in respective attachment / detachment regions to form a pair of left and right leg openings, Disposable pants in which an elastic member is disposed in the vicinity of the leg opening, and the front body sheet member and the back body sheet member are respectively formed of at least first and second sheets laminated. A method for continuously manufacturing a type diaper while advancing in the lateral direction of the diaper,
Attachable / detachable member mounting at least one of the attachable / detachable areas corresponding to the raw material fabric of the first front body sheet and the raw material fabric of the first back body sheet is provided with an attachable / detachable member that makes the both attachable / detachable regions detachable. Process,
A provisional joining step of supplying the raw material fabric of the first front body sheet and the raw material fabric of the first back body sheet so as to partially overlap, and joining at a position in the opening around the leg at the overlapping portion,
Between the raw material of the second front body sheet and the raw material of the first front body sheet, and between the raw material of the second back body sheet and the raw material of the first back body sheet Leg circumference elastic member arrangement step of sandwiching the elastic member at a position around the leg opening,
The elastic member is sandwiched by one or both of the raw material sheets of the first and second front body sheets, and the elastic member is formed by either or both of the raw material sheets of the first and second back body sheets. A waist elastic member placing step sandwiching the
An absorbent body arranging step of arranging an absorbent member at the position of the crotch of the diaper;
Legs for cutting off the opening around the leg in each raw material after the attaching / detaching member attaching step, the temporary joining step, the leg circumferential elastic member arranging step, the trunk circumferential elastic member arranging step, and the absorber arranging step. A process for producing a disposable pants-type diaper, comprising a circumferential opening forming step. Performing the leg elastic member placement step for each of the front body side and the back body side,
Thereafter, the temporary bonding step is performed,
The manufacturing method of the disposable pants type diaper of Claim 1 which performs the said trunk periphery elastic member arrangement | positioning process and the said absorber arrangement | positioning process after that. Performing the leg elastic member arrangement step and the waist elastic member arrangement step for each of the front body side and the back body side,
Thereafter, the temporary bonding step is performed,
The manufacturing method of the disposable pants type diaper of Claim 1 which performs the said absorber arrangement | positioning process after that. The lower piece that follows the abdomen piece comprises two pieces, an outer piece that is hung so as to be located on the front side, and a skin side piece that is hung so as to be located on the skin side, on the outer surface of the skin side piece A first attachment / detachment region is provided, and a second attachment / detachment region is provided on the skin side of the outer piece;
A lower piece following the back piece is provided with the seat member for the back body and the absorbent member, and a third detachable third part can be attached to the outer surface of the lower piece following the back piece. A pants-type diaper having a fourth detachable area that is detachable from the first detachable area on the skin side surface of the absorbent member of the lower piece following the back piece. ,
In the attachment / detachment member attaching step, the attachment / detachment region in the raw material portion of the first front body sheet is the second attachment / detachment region, and the attachment / detachment region in the raw material portion of the first back body sheet is the third attachment / detachment region. Yes,
Moreover, the said absorber arrangement | positioning process arrange | positions the said absorptive member with respect to the raw material fabric of the said 1st, 2nd back body sheet | seat,
First and fourth attaching / detaching member attaching steps for providing an attaching / detaching member capable of attaching / detaching these attaching / detaching regions to at least one of the corresponding attaching / detaching regions of the skin side piece and the absorbent member,
After the absorbent body arranging step and the first and fourth attaching / detaching member attaching steps, the raw material of the skin side piece is placed on the raw material of the absorbent member and the first and second front body sheets. The manufacturing method of the disposable pants type diaper in any one of Claims 1-3 provided with the skin side piece mounting process.