WO2015025760A1

WO2015025760A1 - Disposable diaper manufacturing method and disposable diaper

Info

Publication number: WO2015025760A1
Application number: PCT/JP2014/071185
Authority: WO
Inventors: 隆男和田
Original assignee: 株式会社瑞光
Priority date: 2013-08-22
Filing date: 2014-08-11
Publication date: 2015-02-26
Also published as: CN105473111B; JPWO2015025760A1; JP6498603B2; CN105473111A

Abstract

The purpose of the present invention is to make the overall manufacturing equipment for pant-type and T-type disposable diapers more compact and to produce diapers efficiently by keeping waste of materials to a minimum. The diaper manufacturing method is characterized in that: a base material sheet (8) obtained from a continuous sheet material (W) and an elastic member (11) is continuously supplied in a feed direction (A); an absorbent body (5) is attached to the base material sheet (W) in the central portion of the width direction; the base material sheet (W) is divided into a pair of waist-encircling sheet portions (9a, 9b) and a single crotch covering sheet portion (10) by two dividing lines (18) along the longitudinal direction of the base material sheet; the crotch covering sheet portion (10) is cut at a prescribed length to form individual crotch coverings (6); the crotch coverings (6) are joined one by one alternately to one or the other waist-encircling sheet portion (9a, 9b); the waist-encircling sheet portions (9a, 9b) are cut at an intermediate position between crotch coverings (6) that are adjacent to each other; the crotch sections (3) are folded in two; and the sections near the two ends of the waist-encircling sections (2) are folded inward and each of said ends is fixed to the free end of the crotch section (3).

Description

Disposable diaper manufacturing method and disposable diaper

The present invention relates to a method for manufacturing a disposable diaper and the disposable diaper.

Generally, disposable diapers are provided with a waistline portion that is worn around the wearer's torso and a crotch portion that is fixed to the waistline. The waist part includes a torso elastic member that expands and contracts in the waist direction so as to fit the wearer's body. On the other hand, the crotch portion is provided with an absorber or the like on the inner side (wearer side) of the exterior sheet, and further includes an elastic member for leg rotation that extends and contracts along the side edge portion so as to fit the wearer's leg portion. Yes.

In the disposable diaper, one end portion of the crotch portion is fixed to a central lower portion of one waistline portion extending in the left-right direction and is formed into a T shape in the unfolded state (for example, Patent Document 1). (Refer to the prior art 1). In the worn article of this prior art 1, the crotch part is folded in two, the waist part extending to the side of the crotch part is folded inward, and each end thereof is a free end of the crotch part on the front side of the wearer. By being fixed, it is assembled into a disposable diaper.

In the prior art 1, the waist portion is manufactured while each material is conveyed in the longitudinal direction. That is, the elastic member for body is bonded to the continuously supplied web in an extended state in the longitudinal direction of the web to form an elastic laminate, and this elastic laminate is continuously supplied in the feeding direction. In this case, the feeding direction of the elastic laminate is coincident with the extending direction of the body elastic member. Therefore, it can convey easily in the state which hold | maintained the said elastic member for trunk | drums in the expansion | extension state, and can manufacture the said disposable diaper easily continuously.

However, in the prior art 1, the waistline portion and the crotch portion are manufactured on different production lines. Therefore, it is difficult to make the entire manufacturing facility compact.
Further, the waist portion and the crotch outer body are made of different materials. Therefore, there has been a problem that the manufacturing work becomes complicated.
Furthermore, when a predetermined shape other than a rectangle is adopted for the waist part and crotch part to be manufactured individually, such as when covering the wearer's buttocks widely, when cutting out the web of the predetermined shape from the continuous web, unnecessary portions are cut off. There is a need. Therefore, there is also a problem that waste of material (so-called trim loss) occurs.

In order to solve these problems, it has been proposed to manufacture the crotch part manufacturing process on the same manufacturing line as the waistline part manufacturing process upstream of the crotch part separation process (for example, Patent Document 2). (Refer to the prior art 2).
In this prior art 2, a belt-like sheet base material having a predetermined width is conveyed along the continuous direction, and an intermediate portion in the width direction of the belt-like sheet base material is used as a crotch outer sheet portion. The crotch part is formed by laminating the absorber and the top sheet on the part, and the abdomen waist part and the back waist part are respectively formed on both sides in the width direction. In the dividing step, the crotch portion is divided from the abdominal waist portion and the back waist portion, and the divided crotch portion is cut at a predetermined interval on another production line and separated into individual crotch portions. Is done.

JP03-195555A JP2010-51667A

The prior art 2 is advantageous in that the entire manufacturing facility can be made compact because the waistline portion and the crotch outer sheet portion are formed from a single band-shaped base sheet and divided. However, this conventional disposable diaper has an H-shaped developed state, and the abdominal waistline and the back waistline are joined at the side of the diaper.
That is, the joints of the two waistline parts have higher rigidity than the parts made of a normal sheet material, not only by welding, but also by a detachable joint using a hook-and-loop fastener or the like. The side part of the diaper is a part that is easily subjected to bending deformation or the like following the body movement of the wearer. Therefore, if the flexibility at this side is inferior, the wearing feeling of the diaper is likely to deteriorate.
Moreover, when a caregiver or the like wears a diaper while facing the wearer, it is troublesome to engage and disengage the joint at the side of the diaper.

On the other hand, in the related art 2, the abdomen waist part, the back waist part, and the crotch part need the same length. For this reason, this prior art 2 cannot be applied to a diaper in which the unfolded state is T-shaped and the total length of the waistline portion and the length of the crotch portion are greatly different from each other as in the above-described prior art 1.

The object of the present invention is a disposable diaper that can be produced efficiently while minimizing waste generated in the material while making the entire manufacturing facility compact and simplifying the manufacturing operation while the developed state is T-shaped. It is to provide a manufacturing method and a disposable diaper.

In order to solve the above-mentioned problems, the present invention is described as follows, for example, based on FIGS. 1 to 9 showing an embodiment of the present invention.
That is, according to the method of the present invention, the waist part (2) to be worn around the wearer's torso and the center part (2C) in the waist direction (R) of the waist part (2) at one end (31 And a crotch portion (3) to which the diaper is fixed, and the crotch portion (3) includes an absorbent body (5) that absorbs excreta,
A base sheet (8) in which a continuous sheet material (W) having a predetermined width and an elastic member (11) arranged along the length direction of the continuous sheet (W) are laminated in a feeding direction (A). Base material supply step (S1) to supply automatically,
A pair of waistline sheet portions (9a, 9b) and a crotch exterior sheet portion (10) along the two dividing lines (18) extending in the length direction of the base sheet (8) Substrate dividing step (S3) to divide into
A crotch portion for cutting the tip portion of the crotch exterior sheet portion (10) one after another at a predetermined cutting pitch (L) in the length direction to separate the crotch exterior sheet body (6) into a predetermined length Dividing step (S4),
One end (61) of the separated crotch outer part (6) is divided into one waist part sheet part (9a) and the other waist part sheet part (9b), respectively. A joining step (S5) for alternately joining one by one at an arrangement pitch (P) twice the length of 6);
The central portion in the width direction of the base sheet (8) before the base material splitting step (S3), the crotch outer sheet portion (10) after the base material splitting step (S3), or the individual parts An absorber mounting step (S2) for attaching the absorber (5) to any of the crotch outer body (6);
The waistline sheet portion (9a, 9b) to which the crotch outer body (6) is fixed is cut at an intermediate position between the crotch outer bodies (6) adjacent to each other to provide individual disposable diapers (1 And a diaper individualizing step (S6).

Further, the present invention is characterized in that the disposable diaper is a disposable diaper manufactured by the manufacturing method of the present invention, wherein the length of the crotch portion (3) is half of the length of the waistline portion (2). To do.

The waistline sheet portion constituting the waistline portion and the crotch exterior sheet portion constituting the crotch exterior body are divided from a base sheet made of a continuous sheet material and an elastic member having a predetermined width. For this reason, both the material supply processes are made common, and accordingly, the entire manufacturing facility is compact, and the materials are made common, so material management and material exchange are simplified.

Also, the length of the waistline is twice that of the crotch, so that the unfolded state is set to a length suitable for a T-shaped diaper, and no material is wasted. Further, the waistline sheet portion and the crotch exterior sheet portion are divided by the two dividing lines. Therefore, by forming the dividing line in a desired shape, unnecessary portions are not cut off, for example, worn. A desired shape, such as a shape that widely covers a person's buttocks, is cut out from the base sheet.

The disposable diaper obtained by the above manufacturing method has a T-type developed state. In this T-type disposable diaper, the crotch part is folded in two and both ends of the waistline part are folded inward, and each end part of the waistline part is fixed to the free end of the crotch part as necessary. It is packaged in the packaging process. At the time of packaging, the end portion of the waistline portion may be fixed so as not to be separated by bonding or the like, or may be fixed detachably using a connecting means such as a hook-and-loop fastener. .

In the present invention, “pitch” means a dimension representing the interval (period) when the same shape is arranged at equal intervals.

In addition, the absorbent body attaching step can be performed at an arbitrary timing until it is individually separated into disposable diapers, for example, each crotch outer body fixed to the waistline sheet portion after the joining step, respectively. It is also possible to attach an absorber. However, before the base material splitting step, an absorber is attached to the central portion in the width direction of the base material sheet with a predetermined interval, or after the base material splitting step, the crotch exterior sheet portion is absorbed with a predetermined interval. When the body is attached, a top sheet made of a liquid permeable sheet is continuously supplied to cover the absorbent body, or a back sheet made of a liquid impermeable sheet is placed between the absorbent body and the base sheet. It is preferable that it can be continuously supplied and attached.

Since the present invention is configured and operates as described above, the following effects can be obtained.

(1) The waistline sheet part and the crotch exterior sheet part are divided from a common base sheet, and both material supply processes are made common, so that the entire manufacturing facility can be made compact, Manufacturing operations such as material management and material exchange can be simplified.

(2) The length of the waistline is twice that of the crotch, so that a waistline having a length suitable for a T-shaped diaper in the unfolded state can be obtained, and no material is wasted. Moreover, the waistline sheet portion and the crotch outer sheet portion are divided by the two dividing lines, and therefore, by forming the dividing lines in a desired shape, for example, wearing without removing unnecessary portions. A desired shape such as a shape covering a person's buttocks can be cut out from the base sheet, and the occurrence of trim loss can be reduced or eliminated.

(3) In the obtained disposable diaper, the unfolded state is T-shaped, and each end of the waistline is fixed to the end of the crotch on the front side of the wearer. Even if it is harder than the portion, it is difficult for deformation following the wearer's physical movement to be added, and the wearing feeling can be maintained well. In addition, when the end portion of the waistline portion is detachable, the joint portion is formed on the front side of the wearer, so that the engagement / disengagement operation can be easily performed even when the caregiver faces the wearer. Can be done.

FIG. 1 is a perspective view of a disposable diaper according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of a disposable diaper manufacturing apparatus according to an embodiment of the present invention. FIG. 3: is a schematic perspective view which shows the manufacture procedure of the disposable diaper of the Example of this invention. FIG. 4: is a schematic plan view which shows the manufacture procedure of the disposable diaper of the Example of this invention. FIG. 5: is a schematic plan view which shows the manufacture procedure of the disposable diaper of the Example of this invention. FIG. 6 is an explanatory diagram of the base material dividing step according to the embodiment of the present invention. FIG. 7 is an explanatory diagram of the crotch part dividing step and the joining step in the embodiment of the present invention. FIG. 8A is a plan view showing a partially exploded disposable diaper separated in the diaper separation process of the embodiment of the present invention, and FIGS. 8B and 8C are sectional views thereof. FIG. 9 is a schematic perspective view of the base material supplying step showing another example of the present invention.

In a preferred manufacturing method, prior to the base material dividing step (S3), the elastic members (11) are each waistline portion of the base material sheet (8) divided by the dividing line (18). And the crotch outer sheet portion (10) in the vicinity of the dividing line (18).
In this case, by cutting the elastic member (11) arranged along the feed direction (A) along the dividing line (18), two types of elastic members for the trunk and the leg can be formed.

Preferably, the elastic member disposed in each waistline sheet portion constitutes a trunk elastic member, and the elastic member disposed in the crotch exterior sheet portion constitutes a leg elastic member. When the elastic member includes a body elastic member and a leg elastic member, both elastic members can be arranged on the continuous sheet material in a single process, and thus the process can be further simplified.
These elastic members may be any elastic member that expands and contracts in a predetermined direction, and may be either a thread or a band.

The dividing line may be a straight line along the feeding direction of the base sheet. In this case, the waistline sheet portion and the crotch outer sheet portion are both formed with a constant width and formed from these. Both the waist part and the crotch outer body are formed in a rectangular shape. However, preferably, the dividing line can be set to an arbitrary shape, for example, the crotch outer body in the joining step, rather than the width of the waistline sheet portion at the position to be cut in the diaper individual dividing step. Is formed so that the width of the seat portion for the waistline portion at the position where is fixed. In this case, the obtained disposable diaper is preferable because the center portion of the waistline portion is wide, so that the wearer's buttocks can be satisfactorily wrapped.

More preferably, the dividing line (18) is such that the width of the waistline sheet portion (9a, 9b) changes at the arrangement pitch (P) which is twice the length of the crotch outer body (6). ) Is formed.
In this case, as described above, no material is wasted.

Preferably, the central portion (2C) of the waistline portion (2) in the waistline direction (R) is higher than the height (He) of both ends (2E) in the waistline direction (R) of the waistline portion (2). The dividing line (18) is formed so as to increase the height (Hc).
In this case, the wearer's buttocks can be well wrapped.

Preferably, the dividing line (10) is arranged such that the width in the width direction of the crotch exterior sheet portion (10) changes at the arrangement pitch (P) that is twice the length of the crotch exterior body (6). 18) is formed.
In this case, no material is wasted.

In a preferred disposable diaper, the length of the crotch portion (3) is half of the length of the waistline portion (2).
In this case, no material is wasted.

Further, the crotch outer casing can be set to an arbitrary shape and may be rectangular, but the width of one end fixed to the central portion of the waistline is fixed at each end of the waistline When larger than the width | variety of the other edge part, a wearer's buttocks can be wrapped favorable and it is preferable.

Features described and / or illustrated in connection with one such embodiment or each of the following examples may be in the same or similar form in one or more other embodiments or other examples, and / or It can be utilized in combination with or instead of the features of other embodiments or examples.

The invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings, in which: However, the examples and drawings are for illustration and description only and should not be used to define the scope of the present invention. The scope of the present invention is defined only by the claims. In the accompanying drawings, the same part numbers in a plurality of drawings indicate the same or corresponding parts.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, this disposable diaper (1) has an annular girth part (2) to be worn around the wearer's torso and one of the center part (2C) of the girth part (2). And a crotch portion (3) to which the end portion (31) is fixed. The waist part (2) is formed of an elastic laminate in which a body elastic member (4) extending in the waist direction (R) is fixed to the web (W). The crotch portion (3) includes an absorbent body (5) that absorbs excrement on the skin surface side of the crotch outer body (6). A leg-hole elastic member (7) is fixed to the crotch outer body (6) along the side edge.

The disposable diaper (1) is manufactured by, for example, a manufacturing apparatus shown in FIG.
The manufacturing process by this manufacturing apparatus includes a base material supplying step (S1) for continuously supplying the base material sheet (8) in the feed direction (A) and an intermediate portion in the width direction of the base material sheet (8) in FIG. The absorbent body attaching step (S2) for attaching the absorbent body (5) to the base material sheet (8) of FIG. 4 is replaced with a pair of waistline sheet portions (9a, 9b) and one crotch outer sheet portion (10 ) And a crotch part dividing step (S4) to obtain the crotch exterior body (6) by cutting the crotch exterior sheet portion (10) one after another into a predetermined length. And a step (S5) of joining the crotch outer body (6) alternately one by one to one waistline sheet portion (9a) and the other waistline sheet portion (9b), and FIG. A diaper separation step (S6) for cutting the waistline sheet portions (9a, 9b) at an intermediate position between the crotch outer bodies (6) adjacent to each other, and the separated diaper (1) Fold the crotch (3) in half Each end of travel portion (2) and (2E), respectively and a folding step for fixing the free end of the crotch portion (3) (S7).

As shown in FIGS. 2 and 3, the base material sheet (8) continuously supplied in the feeding direction (A) in the base material supplying step (S1) is a non-woven continuous sheet material having a predetermined width of 2 It is formed by a continuous web (W) of sheets and an elastic member (11) sandwiched between both webs (W) in a state of being stretched in the longitudinal direction. Each continuous web (W) and the elastic member (11) are fixed to each other by an adhesive such as a hot melt adhesive.

The elastic member (11) in FIG. 3 includes a body elastic member (4) disposed on the side edge side of the base sheet (8) and a leg-hole elastic member (7) disposed on the center side. As the material of these elastic members (11), polyurethane, natural rubber, thermoplastic resin, or the like can be used. The shape of the elastic member (11) may be a thread shape, a ribbon shape or the like, and is not limited to one, and may be a plurality. When a thermoplastic resin is used as a material, a hot melt adhesive may be unnecessary if the material itself has a function of adhering to the continuous web (W). The trunk elastic member (4) and the leg elastic member (7) may be of the same material and shape, or may be of different materials and shapes.

In the absorbent body attaching step (S2), a back sheet (12) previously formed of a liquid-impermeable material is bonded to an intermediate portion in the width direction of the base sheet (8), and the back sheet (12) is attached. The absorber (5) is attached at predetermined intervals. For example, as shown in FIG. 2, the absorbent body (5) includes a roll pulp (13) pulverized by a pulverizer (14) in an absorbent body forming step (S8), and a deflated fluff is formed into a pattern drum (15). It is created by being laminated. In addition, as said liquid-impermeable material, a polyethylene film, the nonwoven fabric which has water repellency and air permeability, etc. are preferable, for example.

When the absorbent body (5) shown in FIG. 3 is attached, a top sheet (16) made of a liquid-permeable material covering the absorbent body (5), and flap-shaped cuffs disposed on both sides of the absorbent body (5) ( 17) is attached to the base sheet (8). The cuff (17) is generated, for example, in the cuff forming step (S9) shown in FIG. The liquid permeable material constituting the top sheet (16) is preferably, for example, a liquid permeable nonwoven fabric or a mesh sheet.

A transfer sheet is interposed between the top sheet (16) and the absorbent body (5) in FIG. 3 as necessary, and urine or the like absorbed and diffused quickly from the top sheet (16). It may be configured to prevent leakage.
In the absorbent body (5), a superabsorbent polymer may be dispersed in the fluff. In this case, the absorbent body (5) is wrapped with a tissue so that the superabsorbent polymer does not spill out of the fluff. Is preferred. In addition, it is also possible to comprise the said absorber with what carried the super absorbent polymer on the nonwoven fabric etc.

As shown in FIG. 2, the base material sheet (8) provided with the absorbent body (5) in FIG. 3 is aligned in the length direction by the splitting device (19) in the base material splitting step (S3). In the two dividing lines (18, 18) in FIG. 4, a pair of waistline portion sheet portions (9a, 9b) along each side edge of the base sheet (8) and the base sheet (8) in the middle Into one crotch exterior sheet portion (10). More specifically, as shown in FIG. 6, two pieces that are periodically displaced in the width direction between a portion near the side edge of the base sheet (8) and a portion near the center of the base sheet (8). Divided into three by dividing lines (18, 18). The obtained waist portion sheet portions (9a, 9b) and crotch outer sheet portions (10) are cut into shapes in which a wide portion and a narrow portion are alternately repeated.

That is, in the base material dividing step (S3), the width of the waistline sheet portion (9a, 9b) in FIG. 7 is the arrangement pitch (P) which is twice the length of the crotch outer body (6). The dividing line (18) is formed so as to change.
Further, in the base material dividing step (S3) in FIG. 6, the waistline portion (2) is higher than the height (He) of both ends (2E) in the waistline direction (R) of the waistline portion (2) in FIG. The dividing line (18) is formed such that the height (Hc) of the central portion (2C) in the waistline direction (R) of FIG.
Further, in the base material dividing step (S3) of FIG. 6, the dividing line ((3)) is changed so that the width in the width direction of the crotch outer sheet portion (10) of FIG. 18) is formed.

When the dividing line (18) is a wavy line, the cuff (17) may be a straight line. Further, when the cuff (17) is bent in a wave shape, the cuff (17) may be formed of an elastic nonwoven fabric. In this embodiment, the dividing line (18) is formed in a waveform line that repeats at a constant pitch, but in the present invention, it may be formed in a straight line shape along the length direction of the base sheet. Thus, a waist portion sheet portion (9a, 9b) having a constant width and a crotch outer sheet portion (10) having a constant width are obtained.

6 is formed between the body elastic member (4) and the leg elastic member (7). That is, the body elastic member (4) is arranged on the side edge side of the base sheet (8) with respect to the dividing line (18), whereby each of the waistline sheet portions (9a, 9b) is arranged. Be placed. The leg-hole elastic member (7) is disposed at a position closer to the center of the base sheet (8) than the dividing line (18) and close to the dividing line (18). The crotch outer sheet portion (10) is disposed in the vicinity of the side edge.

As shown in FIG. 4, the crotch outer sheet portion (10) obtained by the division in the substrate dividing step (S3) has a predetermined length by the cutting device (20) in the crotch dividing step (S4). Every time, it cut | disconnects between mutually adjacent absorbers (5), and is divided into crotch part exterior bodies (6). At this time, the crotch outer sheet portion (10) is cut at the center position at the wide portion and the center position at the narrow portion in the length direction, and the crotch outer body (6) obtained thereby is One end (61) in the length direction is wider than the other end (62).

As shown in FIG. 4 and FIG. 7, the individual crotch outer body (6) is transferred to one waistline sheet portion (9a) by the transfer device (21) in the joining step (S5). And the other waistline sheet portion (9b), one by one. At this time, each crotch outer body (6) has its wide end portion (61) joined to the central portion (2C) of the wide portion of each waistline sheet portion (9a, 9b).

As described above, the crotch outer sheet portion (10) in FIG. 4 is cut at predetermined intervals in the length direction, that is, at the center position in the wide portion and the center position in the narrow portion. For this reason, two crotch outer parts (6) are cut out from between the central positions of adjacent narrow parts, and therefore the waistline of FIG. 7 corresponding to the narrow part of the crotch outer sheet part (10). The central position of the wide portion of the part sheet portion (9a, 9b) is an arrangement pitch (P) that is twice the length (L) of the crotch outer body (6). Therefore, the crotch outer body (6) has an arrangement pitch (P) that is twice the length (L) of the crotch outer body (6), and one end (61) of the crotch outer body (6) Joined to the waistline sheet portions (9a, 9b).

The waistline sheet portions (9a, 9b) to which the crotch outer body (6) is fixed are adjacent to each other by the cutting device (22) in the diaper separation step (S6) as shown in FIG. It is cut at an intermediate position between the crotch outer bodies (6), that is, at the center position of the narrow portion of the waistline sheet portions (9a, 9b), and divided into individual disposable diapers (1).

In this embodiment, the crotch outer body (6) is fixed in the joining step (S5) rather than the width of the waistline sheet portion (9a, 9b) at the position where it is cut in the diaper separation step (S6). The dividing line (18) is formed so that the width of the waistline sheet portion (9a, 9b) at the position to be formed is wide. Therefore, as shown in FIG. 8, the waist part (2) of the obtained disposable diaper (1) has a wide central part (2C), and one end of the crotch part (3) joined thereto ( 31) is also preferable because it is formed wide so that the wearer's buttocks can be satisfactorily wrapped. However, in the present invention, the waistline portion can be formed with a constant width.

As shown in FIG. 5, the crotch part (3) is folded in two by the double folding device (23) in the folding process (S7). Fixing means (26) is attached to both ends (2E) of the waist part (2), and both ends of the waist part (2) are folded inward by the assembling device (24), and each end part thereof is folded. (2E) is fixed to the free end of the crotch portion (3) by fixing means (26). The fixing means (26) for fixing the end part (2E) of the waist part (2) may be fixed in an inseparable manner by an adhesive such as a hot melt adhesive, or it may be a hook or the like. Removable connecting means may be used.
Thereafter, the folded individual disposable diaper (1) is changed to an appropriate posture by the reversing device (25) and sent to the next packaging step.

The manufacturing method of the disposable diaper described in the above embodiment is illustrated in order to embody the technical idea of the present invention, and the shape, dimensions, material, manufacturing procedure, etc. of each member are the same as those in this embodiment. It is not intended to be limiting and various modifications can be made within the scope of the claims of the present invention.

For example, in the said Example, the absorber was attached to the center part with respect to the base material sheet before dividing | segmenting at the said base material division | segmentation process. However, in the present invention, the absorbent body may be attached to the crotch outer sheet portion obtained by the division in the base material dividing step, and further, for example, each crotch outer body fixed to the waistline sheet portion. You may comprise so that an absorber may be attached to the divided crotch exterior body.

Further, in the above-described embodiment, the leg elastic member is arranged together with the trunk elastic member on the base material sheet, and this is divided into three by dividing lines. However, in the present invention, only the body elastic member is disposed on the base sheet, and the leg elastic member is disposed together with the back sheet etc. on the crotch exterior sheet portion after being divided in the base material dividing step, for example. May be.

Further, in the above-described embodiment, the base material sheet is configured by sandwiching an elastic member between two continuous sheet materials having a predetermined width. However, in the present invention, for example, the elastic member may be sandwiched between one continuous sheet material having a predetermined width and two continuous sheet materials having a narrow width disposed along each side edge thereof. Furthermore, it is also possible to use a single wide continuous sheet material, fold back both sides inward to form a base sheet having a predetermined width, and sandwich the elastic member at the folded portion.

In the above-described examples, a back sheet, a top sheet, a flap-like cuff (also referred to as a side sheet, a three-dimensional gather), and the like are laminated on the base sheet. However, in the present invention, at least one of these laminated sheet materials may be used as a continuous sheet material constituting the base sheet.
For example, in the above embodiment, each of the two continuous sheet materials is constituted by a continuous web. However, in the present invention, for example, at least one continuous sheet material may be composed of a liquid-impermeable sheet material, and this continuous sheet material may also be used as a back sheet.

Further, for example, as in the modification shown in FIG. 9, the base material is composed of one continuous sheet material (W) having a predetermined width and the outer edge portion (17a) of the flap-shaped cuff (17) disposed inside thereof. You may comprise a sheet | seat (8). That is, in this modification, the elastic member (11) is arranged on the side edge side of one continuous sheet material (W) having a predetermined width, and the absorber ( 5) is attached by a pattern drum (15). A top sheet (16) and a flap-like cuff (17) fixed along both side edges are disposed above the absorbent body (5), and an outer edge (17a) of the cuff (17). The elastic member (11) is sandwiched and integrated with the continuous sheet material (W). That is, the outer edge portion (17a) of the cuff (17) also serves as the continuous sheet material (W), and the outer edge portion (17a), the continuous sheet material (W) having the predetermined width, and an elastic member between them. The base sheet (8) is formed with (11). Reference numeral (17b) denotes an elastic member for the cuff disposed at the inner edge of the cuff (17). Other configurations are the same as those of the above-described embodiment and operate in the same manner, so that the description thereof is omitted.

Further, in the present invention, in the modified example, the outer edge portion of the top sheet is also used as a continuous sheet material instead of the outer edge portion of the cuff, and the elastic member is sandwiched between this and the predetermined width continuous sheet material, It is also possible to form the base sheet. Furthermore, in this case and the modification, the continuous sheet material having the predetermined width may also be used as the back sheet material, thereby further reducing the number of stacked sheets.

In the embodiment, the dividing line is formed in a wavy line shape, a pair of waistline sheet portions along each side edge of the base sheet, and a crotch outer sheet portion positioned in the middle of the base sheet; Divided into However, in the present invention, the dividing line may be formed in a straight line, and in this case, the crotch outer sheet portion can be formed along one side edge of the base sheet.
In the present invention, it is needless to say that constituent materials, dimensions, shapes, and the like of the web, the elastic member, and the absorber are not limited to those of the above embodiments.

The present invention can be used for pants-type and T-type disposable diapers.

1: disposable diaper 2: waist part 2C: center part 2E: end part 3: crotch part 31: one end part 32: the other end part 5: absorber 6: crotch outer part 61: one end part 62: the other end Part 8: Base sheet 9a: One waistline sheet part 9b: The other waistline sheet part 10: Crotch exterior sheet part 11: Elastic member 18: Dividing line L: Cutting pitch P: Arrangement pitch W: Continuous Sheet material (web)
S1: Base material supply process S2: Absorber attachment process S3: Base material division process S4: Crotch part separation process S5: Joining process S6: Diaper individual process S7: Folding process

Claims

The waist part (2) to be worn around the wearer's torso, and the crotch part having one end (31) fixed to the center part (2C) in the waist direction (R) of the waist part (2) (3), wherein the crotch portion (3) includes an absorbent body (5) for absorbing excreta,
A base sheet (8) in which a continuous sheet material (W) having a predetermined width and an elastic member (11) arranged along the length direction of the continuous sheet (W) are laminated in a feeding direction (A). Base material supply step (S1) to supply automatically,
A pair of waistline sheet portions (9a, 9b) and a crotch exterior sheet portion (10) along the two dividing lines (18) extending in the length direction of the base sheet (8) Substrate dividing step (S3) to divide into
A crotch portion for cutting the tip portion of the crotch exterior sheet portion (10) one after another at a predetermined cutting pitch (L) in the length direction to separate the crotch exterior sheet body (6) into a predetermined length Dividing step (S4),
One end (61) of the separated crotch outer part (6) is divided into one waist part sheet part (9a) and the other waist part sheet part (9b), respectively. A joining step (S5) for alternately joining one by one at an arrangement pitch (P) twice the length of 6);
The central portion in the width direction of the base sheet (8) before the base material splitting step (S3), the crotch outer sheet portion (10) after the base material splitting step (S3), or the individual parts An absorber mounting step (S2) for attaching the absorber (5) to any of the crotch outer body (6);
The waistline sheet portion (9a, 9b) to which the crotch outer body (6) is fixed is cut at an intermediate position between the crotch outer bodies (6) adjacent to each other to provide individual disposable diapers (1 And a diaper dividing step (S6).
Prior to the base material splitting step (S3), the elastic member (11) is a base sheet (8) of the waistline portion (9a. The method for producing a disposable diaper according to claim 1, wherein the disposable diaper is disposed in 9b) and disposed in the crotch outer sheet portion (10) and in the vicinity of the dividing line (18).
In the base material dividing step (S3), the crotch outer body in the joining step (S5) is larger than the width of the waistline sheet portion (9a, 9b) at the position cut in the diaper separating step (S6). The disposable diaper according to claim 1 or 2, wherein the dividing line (18) is formed so that a width of the waistline sheet portion (9a, 9b) at a position where (6) is fixed is increased. Production method.
In the base material dividing step (S3), the width of the seat portion (9a, 9b) for the waistline portion is changed at the arrangement pitch (P) that is twice the length of the crotch outer body (6). The method of manufacturing a disposable diaper according to claim 3, wherein the dividing line (18) is formed.
In the base material dividing step (S3), the waistline direction (R) of the waistline part (2) is higher than the height (He) of both ends (2E) of the waistline direction (R) of the waistline part (2). The manufacturing method of the disposable diaper according to claim 1 or 2, wherein the dividing line (18) is formed such that a height (Hc) of the central portion (2C) of the first portion is increased.
In the base material dividing step (S3), the width in the width direction of the crotch exterior sheet portion (10) changes at the arrangement pitch (P) that is twice the length of the crotch exterior body (6). Thus, the method of manufacturing a disposable diaper according to claim 5, wherein the dividing line (18) is formed.
A disposable diaper manufactured by the manufacturing method according to claim 1 or 2,
A disposable diaper, characterized in that the length of the crotch part (3) is half of the length of the waistline part (2).
The crotch outer body (6) has a width of one end (31) fixed to a central portion of the waistline (2), and the other end to which each end of the waistline (2) is fixed. The disposable diaper according to claim 7, wherein the disposable diaper is larger than the width of the portion (32).