JP5889153B2 - Method for producing disposable wearing article - Google Patents

Description

  The present invention relates to a method for continuously manufacturing a worn article such as a disposable diaper, and more particularly to a method for producing a disposable worn article that can be efficiently produced and can reduce waste generated in a material.

Generally, a wearing article such as a disposable diaper includes a waistline portion that is worn around the wearer's torso and a crotch portion having an end fixed to the waistline. The waistline portion is usually provided with a body elastic body that expands and contracts in the longitudinal direction of the waistline portion so as to fit the wearer's body.
Conventionally, as a manufacturing method of this kind of disposable wearing article, there is a method of manufacturing each member in a transverse direction, that is, while conveying each member in the longitudinal direction of the waistline (see Patent Documents 1 to 3). According to these manufacturing methods, the elastic body for the trunk portion is bonded to the web in an extended state in the longitudinal direction of the web to form an elastic laminate that constitutes the waist portion, and this elastic laminate is moved in the feeding direction. Supply continuously. In this case, since the feeding direction of the elastic laminated body and the extension direction of the elastic body for the trunk portion are coincident, the above-mentioned elastic body for the trunk portion can be easily transported in a stretched state, and the above-mentioned wearing It is preferable because the article can be easily manufactured continuously.

Japanese Patent Laid-Open No. 3-176053 JP-A-3-195555 JP 2010-227654 A

  The crotch portion has a cover sheet and an absorbent body attached to the cover sheet. The crotch portion may further include a leg elastic body in order to improve the fit around the leg. The leg elastic body is fixed to the cover sheet in an extended state. Also in the crotch forming step, the above-mentioned elastic body for the leg is bonded and fixed to the support sheet that is continuously supplied in the feed direction in a state of extending in the longitudinal direction of the support sheet. After attaching the above-mentioned absorber, the support sheet is cut into a predetermined length to form a cover sheet, which is formed in a crotch portion provided with the cover sheet, the absorber and the leg elastic body. .

  However, in a state where the crotch portion is joined to the waistline portion, the leg elastic body and the body elastic body are arranged in directions orthogonal to each other. For this reason, in the manufacturing method of the conventional disposable wearing article, in the joining step of the waist part and the crotch part, the crotch part is rotated 90 degrees to change the posture to a direction orthogonal to the feed direction. . Therefore, this conventional technique requires a transfer device having a complicated structure for rotating the crotch posture by 90 degrees (or 270 degrees), which cannot be implemented at low cost, and increases production speed to improve production efficiency. There is a problem that is not easy.

  The cover sheet preferably has a shape other than a rectangle, for example, to make the back side wider than the abdomen side for reasons such as improving fit. However, in the above-described prior art, the support sheet having a constant width that is continuously supplied is cut into a cover sheet, and the cut end portion is connected to the waistline portion. It is a parallel rectangle. For this reason, when making a cover sheet into shapes other than a rectangle, a part of both-sides edge must be excised, In this case, there exists a problem which produces a waste of material.

  The technical problem of the present invention is to provide a method for producing a disposable worn article that eliminates the above-mentioned problems, can be efficiently produced, and can reduce waste generated in the material.

In order to solve the above-described problems, the present invention is described as follows, for example, based on FIGS. 1 to 11 showing an embodiment of the present invention.
That is, this invention relates to the manufacturing method of a disposable wearing article, and manufacture of a disposable wearing article provided with the waist part (2) with which the circumference | surroundings of a wearer's torso are mounted | worn, and the crotch part (3) to which the edge part was fixed to this. A laminate supplying step (S3) for continuously supplying an elastic laminate (4) having a body elastic body (7) fixed to a web (W) in a feed direction (A). A support sheet supply step (S4) for fixing the leg elastic bodies (10) to the continuous support sheet (14) and continuously supplying them in the feed direction (A). The elastic body (7) is fixed to the web (W) in a state of being stretched in the longitudinal direction of the web (W), and the leg elastic body (10) is composed of the support sheet ( 14) is extended to the width direction of the support sheet (14) and is intermittently arranged in the longitudinal direction of the support sheet (14), and is fixed to the support sheet (14). To width Crotch sheet forming step (S6) for forming a crotch sheet (8) having a connection end (21) at a peripheral edge different from the cut end, and the support sheet (14) Alternatively, the absorbent body attaching step (S5) for attaching the absorbent body (9) to the crotch sheet (8), and the above crotch sheet (8) are moved in parallel so that the connection end (21) is made of the elastic laminate. The joining step (S7) for joining the body (4) and the elastic laminate (4) joined to the crotch sheet (8) are cut and separated at the intermediate position between the crotch sheets (8) adjacent to each other. A crotch sheet, further comprising a separating step (S8), wherein the elastic laminate (4) cut and separated constitutes the waist part (2) and the absorber (9) is attached (8) constitutes the crotch portion (3).

  In the support sheet, the leg elastics are arranged in a state of being extended in the width direction of the support sheet. The support sheet is cut in the width direction in the crotch sheet forming step, and the crotch sheet has a peripheral edge different from the cut end, that is, a side edge of the support sheet as a connection end. It is formed. For this reason, by moving the crotch sheet in parallel and joining the connecting end portion to the elastic laminate, the body elastic body and the leg elastic body are arranged in a direction crossing each other.

In the present invention, the above-mentioned “parallel movement” of the crotch seat means that the crotch seat is moved substantially without being rotated in a state where the posture of the crotch seat is substantially maintained. Including the case of moving in the rotational direction.
Further, the “width direction” of the support sheet in which the leg elastic body is extended and the “width direction” of cutting the support sheet are directions extending between both side edges of the support sheet. This includes not only the orthogonal direction but also the direction inclined with respect to the orthogonal direction.

  The support sheet is cut in the width direction every predetermined length to become a crotch sheet. The leg elastic body is located at a position where the cutting is planned in the longitudinal direction of the support sheet. It is arranged on both the front and rear sides. Thereby, this elastic body for legs is arrange | positioned between the cutting edge part of a crotch sheet | seat, and said absorber arrangement | positioning position.

  The leg elastic body or the body elastic body may be an elastic body that expands and contracts in a predetermined direction, and may be either a thread body or a band-shaped body. When the leg elastic body is a belt-like body, the leg elastic body is arranged before and after the planned cutting position, and the support sheet is cut off at the center portion of the belt-like leg elastic body. You may go on.

  The leg elastic body is intermittently disposed on the support sheet, and the absorber is disposed between the leg elastic bodies spaced apart from each other. The absorbent body may be attached to a crotch sheet formed by cutting the support sheet, and may further be attached to a crotch sheet after being joined to the elastic laminate. However, it is preferable to attach this absorbent body to the support sheet before being cut into the crotch sheet because the support sheet is continuous and can be easily attached.

The cutting of the support sheet in the above crotch sheet forming step is not limited to a specific cutting shape. For example, when cut along a direction orthogonal to the side edge of the support sheet, a rectangular crotch sheet is obtained, and the pair of connection end portions formed at the portion that was the side edge of the support sheet have the same dimensions. It becomes.
Moreover, in this invention, you may cut | disconnect in the direction inclined with respect to the direction orthogonal to the side edge of a support sheet, and you may cut | disconnect in the direction inclined to the other side centering on said orthogonal direction in the next cutting location. In the crotch sheet formed in this case, one connection end is longer than the other connection end, such as a trapezoid.

  In this case, by changing the inclination direction of the above cutting every time, a crotch sheet in which one connecting end is longer than the other connecting end is formed, and the other connecting end is connected to the other by the next cutting. A crotch sheet longer than the end is formed. That is, the crotch sheet formed by the above cutting and the crotch sheet formed by the next cutting have shapes reversed 180 degrees from each other, and the long connection ends along each side edge of the support sheet. And short connection ends are alternately formed. As a result, for example, a case where crotch sheets having different dimensions at both connecting ends, such as a trapezoidal shape, is created, but there are fewer portions that must be cut off, and waste generated in the material can be reduced.

  In the above crotch sheet forming step, the support sheet may be cut in a straight line. In this case, waste generated in the material can be efficiently reduced, which is preferable. Further, the above cut may be curved, and in this case, for example, the fit to the wearer's legs and buttocks can be improved, which is preferable.

The shape or the like of the elastic laminate is not limited to a specific one, and the side edge constituting the lower part of the waistline portion may be linear, or may be a shape that repeats unevenness.
This elastic laminated body can employ | adopt arbitrary structures according to the format, shape, etc. of the wearing article manufactured.
For example, this elastic laminate is composed of a first elastic laminate and a second elastic laminate separated from each other, one connecting end of the crotch sheet is joined to the first elastic laminate, and the other The connection end may be joined to the second elastic laminate. In this case, a pants-type disposable wearing article is manufactured by joining both ends of the first elastic laminate to both ends of the second elastic laminate.

  The elastic laminated body has a body elastic body fixed to the web. The web is composed of one outer surface web and two inner surface webs separated from each other. The body elastic body is disposed between the inner web and the inner web, one connecting end of the crotch sheet is joined to one inner web, and the other connecting end is connected to the other inner surface. It may be joined to the web. In this case, before or after the crotch sheet is joined, a leg hole portion is formed in the outer surface web between the attachment positions of the absorber, and the leg hole portion is formed after the separation step described above. By joining the ends of the elastic laminate to each other, a pants-type disposable wearing article is obtained.

Further, the crotch sheet has one connecting end joined to the elastic laminate, and the other connecting end is a free end, between the other connecting end and both ends of the waistline portion. Connecting means for connecting the two to each other may be provided.
In this case, the connecting means may be a T-shaped disposable wearing article by detachably connecting a mechanical fastener or the like, or a connecting means for connecting the connecting means inseparably such as adhesion. It is good also as a pants-type disposable wearing article.

Since the present invention is configured and operates as described above, the following effects can be obtained.
(1) The leg elastic body is fixed to the support sheet in a state of extending in the width direction of the support sheet. After forming the crotch sheet by cutting the support sheet in the width direction, The crotch sheet can be translated to join the connecting end to the elastic laminate. Therefore, there is no need to rotate the crotch sheet, and the crotch sheet can be moved with a transfer device having a simple structure, so that it can be carried out at a low cost and the speed can be increased, and production efficiency can be easily increased. it can.

  (2) In the above crotch sheet forming step, by cutting the support sheet, a crotch sheet in which one connection end is longer than the other connection end is formed, and the other connection end is formed by the next cutting. When forming a crotch sheet having a part longer than one connection end, the crotch sheets sequentially formed by each cutting are formed in a shape that is inverted 180 degrees from each other, so that both connection ends are different from each other. Although it is a case where the crotch part sheet | seat of a dimension is created, the part which must be cut off can be reduced and the waste which arises in material can be suppressed few.

It is a partially broken perspective view of the disposable wearing article manufactured with the manufacturing method of a 1st embodiment of the present invention. It is a system diagram of the manufacturing process of the disposable wearing article which shows a 1st embodiment of the present invention. It is explanatory drawing which shows the manufacturing method of the disposable wearing article of 1st Embodiment. It is a partially broken perspective view of the disposable wearing article in the joining process of the first embodiment. It is explanatory drawing which shows the crotch sheet | seat formation process of 2nd Embodiment. It is explanatory drawing which shows the crotch sheet | seat formation process of 3rd Embodiment. It is explanatory drawing which shows the manufacturing method of the disposable wearing article of 4th Embodiment. It is explanatory drawing which shows the manufacturing method of the disposable wearing article of 5th Embodiment. It is explanatory drawing which shows the manufacturing method of the disposable wearing article of 6th Embodiment. It is explanatory drawing which shows the manufacturing method of the disposable wearing article of 7th Embodiment. It is explanatory drawing which shows the manufacturing method of the disposable wearing article of the modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a first embodiment of the present invention.
As shown in FIG. 1, this disposable wearing article (1) includes an annular waistline (2) to be mounted around the wearer's torso, and a crotch (3) having both ends fixed thereto. It has. Said waist part (2) consists of elastic laminates (4, 4) on the front side and the back side, and both ends of each elastic laminate (4) are fixed to each other. Each elastic laminate (4) has a body elastic body (7) fixed to a web (W). The web (W) comprises an inner surface web (5) and an outer surface web (6) fixed to each other, and the body elastic body (7) is disposed between the webs (5, 6). . On the other hand, the crotch portion (3) includes a liquid-impermeable cover sheet (8) which is a crotch portion sheet and an absorbent body (9) attached to the inside thereof. The leg elastic body (10) is fixed between the side edge and the absorber (9).

Said disposable wearing article (1) is manufactured by the manufacturing process shown, for example in FIG.
This manufacturing process includes an elastic laminate forming step (S1), a cutting step (S2), a laminate supplying step (S3) for forming the waistline (2),
A support sheet supplying step (S4), an absorbent body attaching step (S5), a crotch sheet forming step (S6) for forming the crotch portion (3);
It includes a joining step (S7) and a separation step (S8) for assembling the disposable wearing article.

  As shown in FIG. 2 and FIG. 3, in the elastic laminate forming step (S1), the nonwoven fabric inner surface web (5) and outer surface web (6) are continuously fed in the feeding direction (A), An adhesive such as a hot melt adhesive is applied to at least one of the inner surface web (5) and the outer surface web (6), and the body elastic body is provided between the both webs (5, 6). In the state where (7) is stretched in the longitudinal direction and sandwiched, both webs (5, 6) are bonded and fixed to each other by the above-mentioned adhesive to form an elastic laminate (4).

  As the material for the body elastic body (7), polyurethane, natural rubber, thermoplastic resin, etc. can be used, and the shape can be thread, ribbon, etc. It may be. When a thermoplastic resin is used as the material, a hot melt adhesive may be unnecessary if the material itself has a function of adhering to the web (W). The leg elastic body (10) has the same material and shape.

In the next cutting step (S2), the elastic laminate (4) is cut at the center along the longitudinal direction by the cutting device (11), so that the first elastic laminate (4a) and the second elastic laminate are cut. Formed with body (4b).
In this embodiment, the elastic laminate (4) is linearly cut by the cutting device (11). However, in the present invention, this elastic laminate (4) may be cut along a cutting line such as a wave shape. In this case, the cut end face is formed in an uneven shape.

  The first elastic laminate (4a) and the second elastic laminate (4b) are separated from each other by a predetermined dimension in the next laminate supply step (S3) and supplied in a parallel state to the joining step (S7). Is done. At this time, when the cut end surface of the elastic laminate (4) is formed in an uneven shape, the first elastic laminate (4a) and the second elastic laminate (4b) have one recess. The other convex portion may be made to face each other, or at least one of them may be made to face each other by shifting the half pitch of the waveform in the feeding direction (A).

On the other hand, in the support sheet supply step (S4), the liquid-impermeable film (13) made of synthetic resin is bonded to one side (the wearer's body side) of the backsheet (12) made of nonwoven fabric, and the support sheet ( 14), and this support sheet (14) is continuously fed in the feed direction (A). And in the state where the above-mentioned leg elastic body (10) is extended in the width direction of the support sheet (14) and intermittently arranged in the longitudinal direction of the support sheet (14) on the support sheet (14), It is fixed with an adhesive or the like.
In this embodiment, the leg elastic body (10) is fixed to the surface of the support sheet (14). However, in the present invention, when the support sheet (14) is composed of the back sheet (12) and the liquid impermeable film (13) as described above, the back sheet (12) and the liquid impermeable film (13 ) And the leg elastic body (10) may be arranged and fixed between them.
Moreover, as said liquid-impermeable film (13), a polyethylene film and the nonwoven fabric which has water repellency and air permeability are preferable, for example.

  Next, in the absorbent body attaching step (S5), the absorbent body (9) is placed between the intermittently placed leg elastic bodies (10) and attached to the support sheet (14). It is done. For example, as shown in FIG. 2, the absorbent body (9) includes a roll pulp (15) pulverized by a pulverizer (16) in an absorbent body forming step (S9), and a deflated fluff is formed into a pattern drum (17). It is created by being laminated.

When the absorbent body (9) is attached, a top sheet (18) made of a liquid-permeable sheet that covers the absorbent body (9), or a flap-shaped cuff disposed on both sides of the absorbent body (9) ( 19) is attached to the support sheet (14) as required. The cuff (19) is formed, for example, in the cuff forming step (S10) shown in FIG. In addition, as a liquid-permeable sheet which comprises said top sheet (18), a liquid-permeable nonwoven fabric and a mesh sheet are preferable, for example.
In addition, a transfer sheet is interposed between the top sheet (18) and the absorber (9) to quickly diffuse urine and the like, and the absorbed urine and the like leak from the top sheet (18). It may be configured to prevent.
Further, the absorbent body (9) may be mixed with a superabsorbent polymer in the fluff. In this case, the absorbent body (9) is removed with a tissue so that the superabsorbent polymer does not spill out of the fluff. Wrapping is preferable.

  In the crotch sheet forming step (S6), the support sheet (14) to which the absorbent body (9) is attached is cut in the width direction by a predetermined length by the cutting device (20), and the individual cover sheets (8). ). At this time, as shown in FIG. 3, the peripheral portion of the cover sheet (8) is different from the cut end portion, that is, the portions that were both side edges of the support sheet (14), It is a connection end (21) with the both elastic laminates (4a, 4b).

  In this embodiment, the support sheet (14) is cut in a direction slightly inclined with respect to the direction orthogonal to the side edge, and at the next cutting location, it is opposite to the direction orthogonal to the side edge. The cover sheets (8) are sequentially formed by cutting in a direction inclined to the side. Thereby, each cover sheet (8) becomes trapezoid, and the first connection end (21a) and the second connection end (21b) have different dimensions.

  That is, the cutting of the support sheet (14) is reversed / changed every time the cutting is performed, so that the cover sheets (8) sequentially formed by each cutting are formed in a shape reversed by 180 degrees. Is done. As a result, each cover sheet (8) has both connecting end portions (21a, 21b) having different dimensions, but there is no portion that must be cut out in order to obtain this shape, and no waste occurs in the material.

  In the support sheet supply step (S4), the leg elastic bodies (10) are arranged on both the front and rear sides of the position where the support sheet (14) is scheduled to be cut. . At this time, in this embodiment, the leg elastic body (10) is formed of a thread body. As shown in FIG. 3, the leg elastic body (10) is substantially parallel to the cutting direction. In addition, they are arranged in a direction inclined with respect to a direction orthogonal to the side edge of the support sheet (14) and in a different direction every time they are intermittently arranged. However, in the present invention, even if the cutting direction is inclined, the leg elastic body (10) may be arranged in a direction perpendicular to the side edge of the support sheet (14). The leg elastic body (10) may be a belt-like body.

  Next, in the joining step (S7), as shown in FIGS. 2 and 3, the cover sheet (8) to which the absorber (9) is attached is paralleled one by one by the transfer device (22). Moved. As shown in FIGS. 3 and 4, the first connection end (21a) is joined to the first elastic laminate (4a), and the second connection end (21b) is the second elastic laminate. Bonded to (4b). The cover sheet (8) to which the absorber (9) is attached serves as the crotch portion (3).

In the next separation step (S8), the crotch portion (3) joined to both the elastic laminates (4a, 4b) is folded in half by the bi-folding device (23), and the first elastic laminate (4a) After the second elastic laminate (4b) is overlaid, the two elastic laminates (4a, 4b) are welded by the heat seal device (24) at the intermediate position between the adjacent crotch portions (3), Next, the welding site is cut by a cutting device (25) and separated into individual disposable wearing articles (1). At this time, the cut end of the first elastic laminate (4a) and the cut end of the second elastic laminate (4b) are fused to each other, and both elastic laminates (4a 4b) is the waistline (2).
And the disposable wearing article (1) separated individually is changed into an appropriate posture by the product reversing machine (26), and is sent to the next packaging step.

In the first embodiment, the case where the support sheet is cut into a trapezoid to form a crotch sheet (cover sheet) has been described. However, the crotch sheet in the present invention may have other shapes.
For example, in 2nd Embodiment shown in FIG. 5, the support sheet (14) is cut | disconnected in the direction orthogonal to the side edge. The cover sheet (8) thus formed has a rectangular shape, and the first connection end (21a) and the second connection end (21b) have the same dimensions.

For this reason, when the crotch part (3) provided with the cover sheet (8) is joined to an elastic laminate (not shown), the posture of the crotch part (3) is constant. It is easy to change the posture with a reversing machine.
Furthermore, in this embodiment, when said elastic laminated body consists of a 1st elastic laminated body and a 2nd elastic laminated body, one elastic laminated body can be made into the front side, and the other elastic laminated body can be made into the back side. Therefore, it is possible to make the shapes of both elastic laminates different from each other, for example, by making the width dimensions different from each other. The other configuration is the same as that of the first embodiment described above, and functions in the same manner, so that the description thereof is omitted.

Moreover, in 3rd Embodiment shown in FIG. 6, the space | interval between the both-sides edges of a support sheet (14) is cut | disconnected in the shape of the inclined curve, By this cutting | disconnection, a 1st connection end part (21a) and a 2nd connection end part Cover sheets (8) having different lengths of (21b) are formed.
In the third embodiment, the leg elastic body (10) is used as a belt-like body. When the support sheet (14) is cut, the leg elastic body (10) is also divided into two parts. Is done. The other configuration is the same as that of the first embodiment described above, and functions in the same manner, so that the description thereof is omitted.

In the first embodiment described above, the crotch portion is fixed across the first elastic laminate and the second elastic laminate separated from each other. However, in the present invention, the elastic laminate may have another structure.
For example, in the fourth embodiment shown in FIG. 7, two inner surface webs (5) separated from each other are bonded to one outer surface web (6), and each inner surface web (5) and outer surface web (6) are bonded. A body elastic body (7) is arranged between the web (6) to form an elastic laminate (4). At this time, the body elastic body (7) is fixed to the web (5, 6) in a state of being stretched in the longitudinal direction of each web (5, 6), as in the first embodiment. .

  As in the first embodiment, one connection end (21a) of the crotch sheet (8) to which the absorber (9) is attached is joined to one inner surface web (5a), and the other The connecting end (21b) is joined to the other inner surface web (5b). In the fourth embodiment, since the crotch sheet (8) is arranged so as to overlap a part of the outer web (6), a part of the outer web (6) is used as a cover sheet. The crotch sheet (8) may be formed of only a liquid-impermeable film such as a polyethylene film.

  After both ends of the crotch sheet (8) are fixed to the inner web (5), the outer web (6) has leg holes (27) between the crotch sheets (8). Cut out. Thereby, the waist part (2) and crotch part (3) of a disposable wearing article (1) are made into the shape excellent in fitting property. The leg holes (27) are formed in the outer surface web (6) between the positions where the crotch sheet (8) is fixed before the inner surface web (5). Thereafter, a crotch sheet (8) may be disposed between the leg holes (27) to fix both ends to the inner surface web (5). The other configuration is the same as that of the first embodiment described above, and functions in the same manner, so that the description is omitted.

  FIG. 8 shows a fifth embodiment of the present invention. In this fifth embodiment, one elastic laminate (4) is used, the cover sheet (8) of the crotch portion (3) is formed in a rectangular shape, and the first connection end (21a) of the cover sheet (8) is formed. ) Is fixed to the elastic laminate (4), and the second connection end (21b) is a free end.

  The elastic laminate (4) is provided with connecting means (28) such as a hook fastener at the end cut in the separation step (S8), and the free end of the cover sheet (8). The second connecting end (21b) is detachably connected by the folding device (29). The connecting means (28) may be attached to the second connection end (21b) of the cover sheet (8), or the second connection end (21b) and the elastic laminate (4). It may be provided on both of the cut ends.

  In said 5th Embodiment, the cover sheet (8) of the crotch part (3) was formed in the rectangle. However, in the present invention, even when the second connection end portion (21b) of the cover sheet (8) is a free end, the cover sheet (8) may be formed in another shape such as a trapezoid.

  For example, in the sixth embodiment shown in FIG. 9, the body elastic body (7) is placed between both webs (5, 6) along both side edges of the inner web (5) and outer web (6). The elastic laminate (4) is formed by arranging. The elastic laminate (4) is cut into a wave shape along the longitudinal direction by the cutting device (11), and becomes two elastic laminates (4) each having a crotch cover sheet portion (8a).

  On the other hand, the support sheet (14) to which the absorber (9) is attached is converted into a trapezoidal crotch sheet (8) by the cutting device (20), as in the first and fourth embodiments. . In the crotch sheet (8), the narrow first connection end (21a) is located on the free end side of the cover sheet portion (8a), and the wide second connection end (21b) is the elastic part for the trunk. It is fixed on the cover sheet portion (8a) of each elastic laminate (4) in a posture located on the body (7) side. Next, each elastic laminate (4) to which the crotch sheet (8) is fixed is cut by the cutting device (25) as in the fourth embodiment, and is folded by the two-fold device (23). After folding, the folding device (29) connects the end portion of the elastic laminate (4) corresponding to the waist portion (2) to the free end side of the cover sheet portion (8a) by the connecting means (28). Is done.

In the seventh embodiment shown in FIG. 10, as in the sixth embodiment described above, an elastic laminate (4) having two body elastic bodies (7) is waved along the longitudinal direction by the cutting device (11). Although it is cut into a shape, the shape of the waveform is different from that of the sixth embodiment.
That is, the cover sheet portion (8a) of the sixth embodiment has a wider width on the body elastic body (7) side and a smaller width on the free end side. For this reason, in this 6th Embodiment, there exists an advantage which can wrap a wearer's buttocks favorably by this cover sheet | seat part (8a).
On the other hand, in the cover sheet portion (8a) of the seventh embodiment, the width on the free end side is wider than the width on the body elastic body (7) side. For this reason, since the front side part is comprised with the free end of this wide cover sheet part (8a) among the waist part of disposable wearing articles (1), the elastic body for trunk parts (7) required for the waist part The length of the portion provided with is short and preferable.

  In the cover sheet portion (8a) of each elastic laminate (4), the crotch sheet (8) has a narrow first connection end (21a) located on the body elastic body (7) side. Then, the wide second connection end portion (21b) is fixed in a posture positioned on the free end side of the cover sheet portion (8a). The other configuration is the same as that of the sixth embodiment described above, and functions similarly.

  In each of the above embodiments, the connecting end portion of the crotch sheet is joined to the elastic laminate to form the crotch portion. At this time, the side edge of the elastic laminate may be left as it is as in each of the above embodiments, but the width of the outer surface web (6), for example, as in the modification shown in FIG. The crotch sheet (8) is placed on the elastic laminate (4) and then the connection end (21) of the crotch sheet (8) is sandwiched between The outer web 6 may be folded inward and bonded. In this case, in the manufactured disposable wearing article, the side edges of the waistline portion are smooth, and both ends of the absorbent body (9) are covered with the outer surface web (6), so that the absorbent body (9) absorbs them. It is preferable that leakage of the urine and the like from the waist is prevented.

  In this modification, the outer surface web (6) is formed wide and folded inward, but in the present invention, either the outer surface web or the inner surface web or both are formed wide. It may be folded inward. Further, when the outer surface web (6) is folded as described above, it is possible to constitute the inner surface web of the elastic laminate by the folded portion.

  The manufacturing method of the disposable wearing article 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 described in this embodiment. The present invention is not limited to this, and various modifications can be made within the scope of the claims of the present invention.

  For example, in each of the above-described embodiments, since the process of forming the elastic laminate and the crotch sheet is provided before the joining process of both, the disposable wearing article can be manufactured from the raw material sheet in a series of processes. preferable. However, in the present invention, for example, an elastic laminate or a crotch sheet may be formed in advance in another production line.

In each of the above embodiments, the absorber is attached to the support sheet. In the present invention, the absorber is attached to a crotch sheet formed by cutting the support sheet or a crotch sheet fixed to the elastic laminate. It is also possible.
Further, in the elastic laminate, the time when the body elastic body is fixed to the web may be after the crotch sheet is fixed.

  In the fifth to seventh embodiments, the cut end portion of the elastic laminate (4) is detachably connected to the second connection end portion (21b) of the cover sheet (8) by the connecting means (28). did. However, in the present invention, the cut end portion of the elastic laminate (4) and the second connection end portion (21b) of the cover sheet (8) may be fixed detachably by welding or the like. Needless to say, constituent materials, dimensions, shapes, and the like of the web, support sheet, crotch sheet, and elastic bodies are not limited to those of the above-described embodiment.

  Since the production method of the present invention can be produced efficiently and can reduce waste generated in the material, it is particularly suitable for the production of disposable wearing articles such as disposable diapers.

DESCRIPTION OF SYMBOLS 1 ... Disposable wearing article 2 ... Girth part 3 ... Crotch part 4 ... Elastic laminated body
4a ... first elastic laminate
4b ... 2nd elastic laminated body 5 ... Web for inner surface 6 ... Web for outer surface 7 ... Elastic body for trunk | drum 8 ... Crotch sheet (cover sheet)
9 ... absorber
10 ... Elastic body for legs
14 ... Support sheet
21… Connection end
21a ... first connection end
21b ... Second connection end
28 ... Connecting means A ... Feed direction W ... Web
S1 ... Elastic laminate formation process
S4 ... Support sheet supply process
S5 ... Absorber mounting process
S6 ... Crotch sheet forming process
S7 ... Joining process
S8 ... Separation process

Claims (5)

A method for manufacturing a disposable wearing article comprising a waistline (2) to be mounted around a wearer's torso and a crotch (3) having an end fixed thereto.
A laminate supply step (S3) for continuously supplying the elastic laminate (4) having the body elastic body (7) fixed to the web (W) in the feed direction (A);
A support sheet supply step (S4) for fixing the leg elastic bodies (10) to the continuous support sheet (14) and continuously supplying the leg elastic bodies (10) in the feed direction (A);
Including
The body elastic body (7) is fixed to the web (W) in a state of being stretched in the longitudinal direction of the web (W),
The leg elastic body (10) is extended in the width direction of the support sheet (14) and intermittently disposed in the longitudinal direction of the support sheet (14). Fixed,
A crotch sheet that cuts the support sheet (14) in the width direction at predetermined lengths to form a crotch sheet (8) having a connecting end (21) at a peripheral edge different from the cut end. Forming step (S6);
An absorbent body attaching step (S5) for attaching the absorbent body (9) to the support sheet (14) or the crotch sheet (8);
A joining step (S7) of translating the crotch sheet (8) to join the connecting end (21) to the elastic laminate (4);
A separation step (S8) of cutting and separating the elastic laminate (4) to which the crotch sheet (8) is bonded at an intermediate position between adjacent crotch sheets (8);
The elastic laminate (4) cut and separated constitutes the waist part (2), and the crotch part (3) includes the crotch sheet (8) to which the absorber (9) is attached. In the manufacturing method of disposable wearing articles constituting
In the crotch sheet forming step (S6), by cutting the support sheet (14), the crotch sheet (8) whose one connection end (21a) is longer than the other connection end (21b) is formed. A method for producing a disposable wearing article , characterized in that a crotch sheet (8) in which the other connecting end (21b) is longer than the one connecting end (21a) is formed by subsequent cutting. The manufacturing method of the disposable wearing article according to claim 1 , wherein the crotch sheet (8) is formed by cutting the support sheet (14) into a curved shape. The elastic laminate (4) is composed of a first elastic laminate (4a) and a second elastic laminate (4b) which are separated from each other, and one connecting end ( The disposable wearing article according to claim 1 or 2 , wherein 21a) is joined to the first elastic laminate (4a) and the other connection end (21b) is joined to the second elastic laminate (4b). Production method. The web (W) is composed of two inner webs (5a, 5b) and one outer web (6) which are separated from each other.
The body elastic body (7) is disposed between the inner web (5a, 5b) and the outer web (6).
One connecting end (21a) of the crotch sheet (8) is joined to one inner surface web (5a), and the other connecting end (21b) is joined to the other inner surface web (5b). The manufacturing method of the disposable wearing article of Claim 1 or Claim 2 . One connecting end (21a) of the crotch sheet (8) is joined to the elastic laminate (4), and between the other connecting end (21b) and both ends of the elastic laminate (4). The manufacturing method of the disposable wearing article of Claim 1 or Claim 2 which provides the connection means (28) which connects both mutually.

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