WO2018083768A1

WO2018083768A1 - Method for manufacturing absorbent article

Info

Publication number: WO2018083768A1
Application number: PCT/JP2016/082687
Authority: WO
Inventors: 竹内　賢治; 巧横山
Original assignee: ユニ・チャーム株式会社
Priority date: 2016-11-02
Filing date: 2016-11-02
Publication date: 2018-05-11
Also published as: JP6668388B2; JPWO2018083768A1

Abstract

This method for manufacturing an absorbent article includes: a waist conveying step (S1) of conveying a front waist continuous body (C20) having continuous waist members in a width direction; an elastic member disposing step (S2) of sending out a first elastic continuous body (C23) and a second elastic continuous body (C24) having continuous waist elastic members and disposing the first elastic continuous body (C23) and the second elastic continuous body (C24) on the front waist continuous body; and a cutting step (S3) of cutting the first elastic continuous body (C23) and the second elastic continuous body (C24). In the elastic member disposing step, the elastic continuous body is disposed along a machine direction (MD) of the waist continuous body in a non-shaking region (NSR), and the elastic continuous body is disposed while being shaken in a cross direction (CD) that is orthogonal to the machine direction in a shaking region (SR). In the cutting step, the elastic continuous body in the shaking region is cut.

Description

Method for manufacturing absorbent article

The present invention relates to a method for manufacturing an absorbent article in which a waistline elastic member is arranged while being swung in the longitudinal direction of the absorbent article.

Patent Document 1 discloses a method for manufacturing an absorbent article in which a waistline elastic member is arranged while being swung in the longitudinal direction of the absorbent article. In the manufacturing method of the absorbent article of Patent Document 1, a waistline continuum in which the waistline region of the absorbent article is continuous in the width direction is conveyed, and the stretchable continuum in which the waistline stretchable member is continuous on the waistline continuum is the absorbent article. It arrange | positions, making it rock | fluctuate in a longitudinal direction (for example, refer FIG. 3 of patent document 1).

JP-A-11-155901

In the state where the stretch continuum is arranged on the waist continuum, the waist continuum receives a force in the direction in which the stretch continuum contracts. At this time, the waistline continuum is transported in a state of being continuous in the width direction, and is not easily contracted in the width direction because it receives a tensile force along the width direction. On the other hand, since the waistline continuum is not subjected to a pulling force along the longitudinal direction, it tends to shrink in the longitudinal direction.

The waistline continuum of Patent Document 1 is a continuum in which the front waistline region, the crotch region, and the rear waistline region are integrated. For example, when a force in a contracting direction is applied to the front waistline region, the force is applied to the crotch region and the back region. Disperses in the waist area and hardly shrinks in the longitudinal direction. However, the waistline continuum that constitutes only the front waistline region or the rear waistline region is not connected to the crotch region or the like, and the force in the shrinking direction is not dispersed, so that it tends to shrink in the longitudinal direction. If the length in the longitudinal direction of the crotch continuous body is shortened during production, the position of the crotch continuous body may be displaced from other members, and an absorbent article having the intended shape may not be produced.

The present invention has been made in view of the above-mentioned problems, and is capable of producing an absorbent article having an intended shape by suppressing contraction in the longitudinal direction of a waistline member constituting the front waistline area or the back waistline area. It aims at providing the manufacturing method of.

The manufacturing method of the absorbent article which concerns on this indication contains the absorber (absorber 12), and has the longitudinal direction (longitudinal direction L) and the absorptive main body (width direction W) orthogonal to the said longitudinal direction (width direction W) ( Absorbent body 10), waistline members (front waistline member 20, rear waistline member 30) constituting a front waistline region (front waistline region R2) or a back waistline region (rear waistline region R3), and a waistline extending in the width direction An absorptive article provided with elastic members (front waist elastic member 21, rear waist elastic member 31) is manufactured. The waistline member has a constant length in the longitudinal direction. The manufacturing method of the absorbent article includes a waistline transport step (a waistline transport step S1) in which the waistline member transports a waistline continuum (front waistline continuum C20) that is continuous in the width direction, and the stretch around the waistline stretchable member. Extending the continuum (first stretch continuum C23, second stretch continuum C24) and placing the stretch continuum on the waistline continuum (stretch member placement step S2), and the stretch continuum Cutting step (cutting step S3). The expansion / contraction member arranging step arranges the expansion / contraction continuous body in the non-oscillation region (non-oscillation region NSR) along the conveyance direction (conveyance direction MD) of the waistline continuum, and the oscillation region (oscillation region SR). ), The expansion / contraction continuous body is disposed while swinging in an orthogonal direction (orthogonal direction CD) orthogonal to the transport direction. The cutting step cuts the stretchable continuum in the swing region.

According to the method for manufacturing an absorbent article according to the present disclosure, it is possible to suppress the contraction in the longitudinal direction of the waistline region by the waistline elastic member, and to manufacture the absorbent article having the intended shape.

It is a top view of an absorptive article in one embodiment. It is the top view which expanded the front waist area shown in FIG. It is a figure for demonstrating a trunk periphery conveyance step and an expansion-contraction member arrangement | positioning step. It is a figure for demonstrating an expansion-contraction member arrangement | positioning step and a cutting step. It is a figure for demonstrating an expansion-contraction member arrangement | positioning step, and is the figure which showed the arrangement | positioning aspect of a 1st expansion-contraction continuous body. It is a figure for demonstrating an expansion-contraction member arrangement | positioning step, and is the figure which showed the arrangement | positioning aspect of a 2nd expansion-contraction continuous body. It is a figure for demonstrating the expansion-contraction member arrangement | positioning step in the manufacturing method of the absorbent article which concerns on a modification.

At least the following matters will become clear from the description of this specification and the accompanying drawings.

An absorbent main body including an absorbent body and having a longitudinal direction and a width direction orthogonal to the longitudinal direction, a waistline member constituting a front waistline region or a back waistline region, and a waistline elastic member extending in the width direction are provided. ,
The waistline member is a method for manufacturing an absorbent article, wherein the length in the longitudinal direction is constant,
A waistline conveying step in which the waistline member conveys a waistline continuum continuous in the width direction;
Extending the stretchable continuum in which the waistline stretchable member is continuous, and the stretchable member placement step of placing the stretchable continuum on the waistline continuum;
A cutting step for cutting the stretchable continuous body,
The expansion / contraction member disposing step arranges the expansion / contraction continuous body in the non-oscillation region along the conveyance direction of the waistline continuum, and swings in the orthogonal direction perpendicular to the conveyance direction in the oscillation region. Place the body,
The said cutting step is a manufacturing method of an absorbent article which cut | disconnects the said expansion-contraction continuous body in the said rocking | fluctuation area | region.

In the expansion / contraction member arrangement step, the expansion / contraction continuum is disposed while being swung in the orthogonal direction, so that the expansion / contraction continuum is subjected not only to a force contracting in the transport direction but also to a contracting force in the orthogonal direction. Further, the waistline continuum is transported in a state of being continuous in the transport direction and receives a tensile force along the transport direction, but does not receive a tensile force along the orthogonal direction. Therefore, the waistline continuum easily contracts in the orthogonal direction. The waistline continuum easily contracts in the orthogonal direction, particularly in the swing region where the stretchable continuum is swinged in the orthogonal direction. In the cutting step, by cutting the stretchable continuum in the swing region, the force to shrink in the orthogonal direction can be divided, and the waistline continuum can be prevented from shrinking in the orthogonal direction, and the longitudinal shrinkage of the waistline region can be prevented. It is possible to produce an absorbent article that is suppressed and has the intended shape.

A method of manufacturing such an absorbent article,
The stretchable continuum has a first stretchable continuum and a second stretchable continuum that intersects the first stretchable continuum,
In the cutting step, it is desirable to cut the stretch continuum between intersections of the first stretch continuum and the second stretch continuum.

When the first stretch continuum and the second stretch continuum intersect, the positions of the first stretch continuum and the second stretch continuum in the orthogonal direction are interchanged, so that a force contracting in the orthogonal direction is more likely to occur. By cutting the stretchable continuum in the region between the intersections, the force can be divided at a place where the force that contracts in the orthogonal direction is more likely to be generated, and it is effective that the waistline continuum contracts in the orthogonal direction. Can be suppressed.

A method of manufacturing such an absorbent article,
In the expansion / contraction member disposing step, it is desirable that at least a part of the first expansion / contraction continuous body and at least a part of the second expansion / contraction continuous body are swung in the orthogonal direction.

Both the first stretchable continuum and the second stretchable continuum are displaced in the orthogonal direction, and the waistline continuum is orthogonal to the orthogonal contraction force by the first stretchable continuum and the second stretchable continuum. The contraction force in the direction is applied. The waistline continuum receives contraction force acting in a plurality of directions, and it is difficult to keep the length in the orthogonal direction constant. In the absorbent article configured as described above, by cutting the stretchable continuous body in the swing region, the shrinkage in the orthogonal direction of the waistline continuous body is effectively suppressed, and the absorbent article having the intended shape is obtained. Can do.

A method of manufacturing such an absorbent article,
In the expansion / contraction member arrangement step, the first expansion / contraction continuous body is disposed in parallel to the transport direction, and at least a part of the second expansion / contraction continuous body is swung in the orthogonal direction,
It is desirable that the cutting step cuts at least the second stretchable continuous body.

In the vicinity of the intersection where the first stretchable continuum and the second stretchable continuum intersect, the position of the first stretchable continuum is easily displaced in the longitudinal direction by the contraction force of the second stretchable continuum. By cutting at least the second expansion / contraction continuous body, the force in the contraction direction of the second expansion / contraction continuous body can be divided, and the intended contraction mode by the first expansion / contraction continuous body can be easily realized.

A method of manufacturing such an absorbent article,
The elastic member arrangement step arranges the first elastic continuous body and the second elastic continuous body so as to overlap in the thickness direction,
The cutting step may cut the stretchable continuous body from the first stretchable continuous body side.

By cutting the stretchable continuous body from the first stretchable continuous body side, the second stretchable continuous body is cut after the first stretchable continuous body is cut. The 1st expansion-contraction continuous body is along a conveyance direction, and does not have a contraction force along an orthogonal direction. The force along the orthogonal direction does not change when the first stretchable continuous body is cut, and the displacement of the waistline continuous body in the orthogonal direction can be suppressed. Therefore, the cutting position of the second stretchable continuous body can be stabilized.

A method of manufacturing such an absorbent article,
The elastic member arrangement step arranges the first elastic continuous body and the second elastic continuous body so as to overlap in the thickness direction,
The cutting step may cut the stretchable continuous body from the second stretchable continuous body side.

The first stretchable continuum is cut after the second stretchable continuum is cut by cutting the stretchable continuum from the second stretchable continuum side. The first telescopic continuous body is unlikely to be sandwiched between the second telescopic continuous body and the cutting blade, the cutting blade can be applied to the intended position of the second telescopic continuous body, and the cutting position of the second telescopic continuous body is stabilized. Can do.

A method of manufacturing such an absorbent article,
The stretching member disposing step separates the second stretchable continuous body so as to sandwich a non-stretchable region where the first stretchable continuous body is not disposed on the one side in the orthogonal direction with respect to the intersection. Place and
In the cutting step, it is desirable to cut the second stretchable continuum disposed with the non-stretchable region on the other side in the orthogonal direction with respect to the intersection.

The non-stretchable region is sandwiched by the second stretchable continuum, and the first stretchable continuum is not disposed, so that the non-stretchable region is easily contracted due to the influence of the stretchable continuum disposed around. Moreover, the 2nd expansion-contraction continuous body arrange | positioned on both sides of a non-expanding area | region has extended to the other side beyond the intersection, and the force contracted in an orthogonal direction generate | occur | produces comparatively large. By cutting the second stretchable continuum disposed with the non-stretchable region in between, the shrinkage force applied to the nonstretchable region can be reduced, and the shrinkage in the orthogonal direction of the waistline continuum can be suppressed.

A method of manufacturing such an absorbent article,
In the expansion / contraction member disposing step, it is desirable to dispose the expansion / contraction continuum so that the elongation stress of the first expansion / contraction continuum and the expansion stress of the second expansion / contraction continuum are different.

In an absorbent article in which the extension stress of the first stretch continuum and the extension stress of the second stretch continuum are different, the contraction force of each stretch continuum is different, and the contraction force in the waist area acts in a complicated manner. By cutting the stretchable continuous body in the swing region, the force in the contraction direction of the stretchable continuous body can be cut off, the intended shape of the waistline member can be realized, and an absorbent article having the intended shape can be manufactured.

A method of manufacturing such an absorbent article,
In the cutting step, it is desirable that at least the stretchable continuum having a high elongation stress is cut out of the first stretchable continuum and the second stretchable continuum.

The contraction force of one expansion / contraction continuum having a high elongation stress may cause the other expansion / contraction continuum to be pulled, and the intended contraction mode by the other expansion / contraction continuum may not be realized. By cutting one stretch continuum having a high elongation stress, the force in the contraction direction of the other stretch continuum can be divided, and the intended contraction mode can be easily realized by both stretch continuums.

A method of manufacturing such an absorbent article,
In the cutting step, it is desirable to cut a region along the transport direction of the stretchable continuous body.

The stretchable continuum cut by the cutting step contracts along the direction extending before cutting. By cutting the region along the transport direction, the contracted stretchable continuum is easily arranged along the transport direction, and it is difficult for the user to feel uncomfortable in appearance.

Also, when the stretchable continuum is cut, the contraction force along the direction extending before cutting is divided. By cutting the stretchable continuum in the region along the transport direction, the contraction force changes only with the force along the transport direction, and it is difficult for the force along the orthogonal direction to change. The direction length is easy to stabilize. Therefore, the cutting position can be stabilized when continuously cutting a plurality of stretchable continuous bodies.

A method of manufacturing such an absorbent article,
In the cutting step, it is desirable to cut only one portion of each stretchable continuous body.

For example, when trying to cut each expansion / contraction continuous body at a plurality of locations, the expansion / contraction continuous body contracts every time it is cut at one location, and then the cutting position at the time of cutting is difficult to stabilize. By cutting only one portion of each stretchable continuous body, the cutting position is stabilized. In addition, the stretchable continuum disposed between the cut portions does not continue to the other stretchable continuum and remains in a contracted state. By cutting only one place of each stretchable continuum, it is possible to suppress the stretchable continuum from remaining in a contracted state, and to suppress the uncomfortable appearance.

=== About the absorbent article which concerns on this Embodiment ===
Hereinafter, with reference to drawings, the manufacturing method of the absorptive article concerning an embodiment is explained. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

Examples of the absorbent article manufactured by the method for manufacturing an absorbent article include disposable diapers, sanitary napkins, and absorbent pads. In this Embodiment, the manufacturing method which manufactures a disposable diaper is demonstrated.

The absorbent article 1 is a pants-type disposable diaper, and FIG. 1 is a plan view of the absorbent article 1 in a developed state. The absorbent article 1 is disposed between the front waistline region R2 disposed on the wearer's abdomen side, the rear waistline region R3 disposed on the wearer's buttocks side, the front waistline region R2 and the rear waistline region R3. And a crotch region R1 disposed in the crotch of the wearer. The front waistline region R2 is a region where the front waistline member 20 is disposed, and the rear waistline region R3 is a region where the rear waistline member 30 is disposed.

The absorbent article 1 has an absorbent main body 10 and a waistline member. The absorbent article 1 has a longitudinal direction L and a width direction W orthogonal to the longitudinal direction L. The absorbent main body 10 may include a top sheet 11, an absorbent body 12, and a back sheet 13. The top sheet 11 is disposed on the skin contact surface side of the absorbent body 12 and has liquid permeability. The back sheet 13 is disposed on the non-skin contact surface side of the absorbent body 12 and has liquid impermeability. The absorber 12 is disposed between the top sheet 11 and the back sheet 13.

The waistline member includes at least a front waistline member 20 constituting the front waistline region R2, a rear waistline member 30 constituting the rear waistline region R3, and a waistline elastic member extending in the width direction W. The front waistline member 20 and the rear waistline member 30 are rectangular in plan view, and the length in the longitudinal direction L is constant. The waistline elastic member can be expanded and contracted in the width direction W. The waistline elastic member includes a front waistline elastic member 21 disposed in the front waistline region R2 and a back waistline elastic member 31 disposed in the rear waistline region R3. The front waistline member 20 includes at least an exterior topsheet 25 and an exterior backsheet (not shown). The rear waistline member 30 includes at least an exterior topsheet 35 and an exterior backsheet (not shown). The front waistline elastic member 21 is fixed in an extended state in the width direction W between the exterior topsheet 25 and the exterior backsheet. The rear waistline elastic member 31 is fixed in an extended state in the width direction W between the exterior topsheet 35 and the exterior backsheet. Of the front waistline member 20 and the rear waistline member 30, at least the front waistline member 20 constitutes the waistline member of the present application.

The front waistline elastic member 21 includes a first elastic member 23 and a second elastic member 24. In FIG. 2, the 1st expansion-contraction member 23 is shown as a continuous line, and the 2nd expansion-contraction member 24 is shown with a dashed-dotted line. The extension stress of the first elastic member 23 is different from the extension stress of the second elastic member 24. The first elastic member 23 and the second elastic member 24 include the number of elastic members, the density (dtex) of the elastic members, the expansion ratio when the elastic members are fixed to the exterior sheet, the amount of displacement in the orthogonal CD, and the elastic members. At least one of the intervals is different. The extension stress of the entire first extension member 23 including the plurality of first extension members 23 may be different from the extension stress of the entire second extension member 24 including the plurality of second extension members 24. The extension stress of the one elastic member 23 may be different from the extension stress of the single second elastic member 24.

Here, the extension stress is a stress when it is extended, and the higher the extension stress is, the more difficult it is to extend and the better the fit to the body. The tensile stress can be measured using a tensile tester manufactured by Shimadzu Corporation. The measurement is performed by cutting samples from the front waistline region R2 and the back waistline region R3. First, with one end of the sample fixed to the upper chuck in the tensile test and the other end of the sample fixed to the lower chuck, they are separated by 180 mm (the size of the grip portion of the chuck is about 15 mm). Next, the lower chuck is moved at a speed of 100 mm / min, separated until the distance between the chucks reaches 460 mm, the movement is reversed, and the movement is reversed until the distance between the chucks reaches 180 mm. The measured value at the time of separation until reaching 460 mm can be defined as the elongation stress (N).

Next, a method for manufacturing an absorbent article constituting such an absorbent article 1 will be described with reference to FIGS. The method for manufacturing an absorbent article includes at least a waistline conveying step S1, an elastic member arranging step S2, and a cutting step S3. In the present embodiment, a process for manufacturing the front waistline region R2 will be described. 3 and 4 are explanatory diagrams showing an outline of each step, and FIG. 4 is an explanatory diagram on the downstream side in the transport direction MD of the explanatory diagram of FIG. 3. Further, in the present embodiment, the manufacturing steps of the waistline member will be described. However, in addition to the following steps, well-known manufacturing steps such as a step of forming the absorbent body, a step of integrating the absorbent body and the waistline member, etc. You may have.

In the waistline transport step S1, a waistline continuum is formed, and the waistline continuum is transported. The waistline continuum includes a front waistline continuum C20 in which the front waistline member 20 is continuous in the width direction W. The width direction W of the front waistline member is along the transport direction MD of the waistline transport step S1, and the longitudinal direction L of the front waistline member 20 is along the orthogonal direction CD. The front waistline continuum C20 includes an exterior top continuum C25 in which the exterior topsheet 25 is continuous, and an exterior back continuum C26 in which the exterior backsheet is continuous.

In the waistline transport step S1, the exterior top continuous body C25 is transported continuously, and an adhesive for fixing the stretchable continuous body is applied onto the exterior top continuous body C25. The region where the adhesive is applied is a region where the waistline continuum is fixed in an elongated state. No adhesive is applied to the region where the waistline continuum is placed in an unstretched state. In FIG. 3, the application region HR where the adhesive is applied is shown by hatching. The application region HR is arranged at an interval in the transport direction MD. The application region HR is provided in the non-oscillation region NSR and a part of the oscillation region SR. A coating region HR is provided at the side of the swing region SR in the transport direction MD, and no coating region HR is provided at the center of the swing region SR in the transport direction MD. Therefore, the expansion / contraction continuum in the center of the swing region SR in the transport direction MD is displaced along the transport direction MD without maintaining the swing path.

Next, in the expansion / contraction member arrangement step S2, an expansion / contraction continuous body in which the waistline expansion / contraction member continues is fed out, and the expansion / contraction continuous body is disposed on the waistline continuous body. The stretchable continuum includes a first stretchable continuum C23 in which the first stretchable member 23 continues and a second stretchable continuum C24 in which the second stretchable member 24 is continuous. In the expansion / contraction member arrangement step S2, the first expansion / contraction continuous body C23 in which the first expansion / contraction member 23 is continuous is disposed on the exterior top continuous body C25, and the second expansion / contraction continuous body C24 in which the second expansion / contraction member 24 is continuous is disposed in the exterior top. It arrange | positions on the continuous body C25.

In the stretchable member placement step S2, the stretchable continuous body is placed on the waistline continuous body while being swung in the orthogonal direction CD while being stretched. In the swingable member placement step S2, the stretchable continuous body is placed on the exterior top continuous body C25 while swinging the stretchable continuous body in the orthogonal direction CD. The trajectory of the expansion / contraction continuum of the swing region SR has a curved shape in which the position in the orthogonal direction CD is displaced. In the stretchable member placement step S2, the stretchable continuous body is placed along the transport direction MD in the non-oscillating region NSR. The trajectory of the stretchable continuum of the non-oscillating region NSR is a straight line along the transport direction MD without displacement of the position in the orthogonal direction CD.

In the expansion / contraction member arrangement step S2, the expansion / contraction continuum is disposed so that the extension stress of the first expansion / contraction continuum C23 and the extension stress of the second expansion / contraction continuum C24 are different. The trajectory of the first stretchable continuum C23 and the trajectory of the second stretchable continuum C24 are different. FIG. 5 is a diagram schematically showing an arrangement mode of the first stretchable continuous body C23, and FIG. 6 is a diagram schematically showing an arrangement mode of the second stretchable continuous body C24. The stretchable continuum in the product state is indicated by a solid line, and the stretchable continuum placed in the stretchable member placement step is indicated by a dotted line.

Three first expansion / contraction continuous bodies C23 are provided. A part (one on the crotch region side) of the first stretch continuum C23 is arranged along the transport direction MD, and the other (two on the front side) first stretch continuum C23 is in the non-oscillating region NSR. It is arranged along the transport direction MD, and is arranged while being swung in the orthogonal direction CD in the swing region SR. Four second stretchable continuums C24 are provided. All the second stretchable continuums C24 are arranged along the transport direction MD in the non-oscillation region NSR, and are arranged while being oscillated in the orthogonal direction CD in the oscillation region SR. In addition, all the 1st expansion-contraction continuous bodies C23 and all the 2nd expansion-contraction continuous bodies C24 may be rock | fluctuated.

The stretchable continuous body swung in the orthogonal direction CD is fixed to the exterior top continuous body C25 in the application region HR, and the exterior top in the non-application region (the region where the adhesive is not applied and the region other than the application region). It is not fixed to the continuum C25. The stretchable continuum in the non-application area contracts and does not maintain a swung trajectory, and is a straight line that connects the ends (ends on the non-application area side) of the stretchable continuum fixed by the application area HR. Placed in. 5 and 6, the first stretch continuum C23 and the second stretch continuum C24 that are arranged in a state of being swung in the non-application area and before contracting are indicated by dotted lines. The end in the transport direction of each stretchable continuum fixed by the application region HR of the present embodiment (the end in the transport direction of each stretchable continuum arranged across the non-application region) is the position in the orthogonal direction CD. Match. Therefore, the stretchable continuous body in the non-application area is arranged along the transport direction MD.

As shown in FIG. 2, at least a part of the first stretchable continuum C23 and at least a part of the second stretchable continuum C24 intersect each other. Since the first stretch continuum C23 and the second stretch continuum C24 intersect, the positions of the first stretch continuum C23 and the second stretch continuum C24 in the orthogonal direction CD are switched. In the expansion / contraction member arrangement step S2, the first expansion / contraction continuous body C23 and the second expansion / contraction continuous body C24 are disposed so as to overlap in the thickness direction T at the intersections P1 and P2. FIG. 3 illustrates intersection points P1 and P2 of the first stretchable continuum C23 and the second stretchable continuum C24. In the present embodiment, two intersection points P1 and P2 are provided in the front waistline member 20 corresponding to one product. One intersection may be provided in the front waistline member 20 corresponding to one product, or three or more intersections may be provided.

Next, as the waistline transport step S1, the exterior back continuous body C26 is disposed so as to cover the exterior top continuous body C25, the first stretchable continuous body C23, and the second stretchable continuous body C24. In the waistline transport step S1, the exterior top continuum C25 may be disposed after the first stretch continuum C23 and the second stretch continuum C24 are disposed on the exterior back continuum C26.

In the cutting step S3, the stretchable continuous body is cut. The cutting step S3 cuts at least one of the stretchable continuums in the rocking region SR and is arranged in a rocked state. The stretchable continuum arranged in a swayed state is placed in a swayed state and is not only a stretchable continuum fixed in that state, but also in a swayed state and fixed in that state. It is a concept including a stretchable continuum that shrinks without shrinking. In the cutting step S3 of the present embodiment, the exterior top continuous body C25, the exterior back continuous body C26, and the stretchable continuous body are cut with a cutting blade.

In the expansion / contraction member arrangement step S2, the expansion / contraction continuum is arranged while being swung in the orthogonal direction CD, so that the expansion / contraction continuum is applied not only with a force contracting in the transport direction MD but also with a contraction force in the orthogonal direction CD. Further, the front waistline continuum C20 is transported in a state of being continuous in the transport direction MD and receives a tensile force along the transport direction MD, but does not receive a tensile force along the orthogonal direction CD. Therefore, the front waistline continuum C20 is easily contracted in the orthogonal direction CD. Further, in the case of the waistline continuum having a constant length in the longitudinal direction L as in the present embodiment, the waistline continuation in which the length in the longitudinal direction L is not constant and a part extends in the lengthwise direction L. Trim generation can be suppressed compared to the body, and waste of materials can be reduced. However, in a waistline continuum having a constant length in the longitudinal direction L, it tends to shrink in the orthogonal direction CD. In addition, in the manufacture of the so-called three-piece absorbent article as in the present embodiment, a force that contracts in the orthogonal direction CD is more likely to occur. In particular, the front waistline continuum C20 easily contracts in the orthogonal direction CD in the swing region SR in which the stretchable continuum is swinged in the orthogonal direction CD. In the cutting step S3, the contraction force in the orthogonal direction CD can be divided by cutting the stretchable continuum in the swing region SR. The front waistline continuum C20 can be prevented from contracting in the orthogonal direction CD, the contraction in the longitudinal direction L of the front waistline region R2 is suppressed, and an absorbent article having the intended shape can be manufactured.

In the present embodiment, the extension stress of the first stretch continuum C23 and the extension stress of the second stretch continuum C24 are different. In the absorbent article 1 in which the extension stress of the first stretch continuum C23 and the extension stress of the second stretch continuum C24 are different, the contraction force of each stretch continuum is different, and the contraction force in the waistline region acts in a complex manner. By cutting the stretchable continuous body in the swing region SR, the force in the contraction direction of the stretchable continuous body can be cut off, the intended shape of the waistline member can be realized, and an absorbent article having the intended shape can be manufactured.

Moreover, cutting step S3 may cut | disconnect at least the expansion-contraction continuous body with high elongation stress among the 1st expansion-contraction continuous body C23 and the 2nd expansion-contraction continuous body C24. Due to the contraction force of one stretch continuum having a high elongation stress, the other stretch continuum may be pulled, and the intended contraction mode by the other stretch continuum may not be realized. By cutting an expansion / contraction continuous body having a high elongation stress, the force in the contraction direction of the expansion / contraction continuous body having a low elongation stress can be divided, and the intended contraction mode can be easily realized by both expansion / contraction continuous bodies.

The cutting step S3 cuts both the first expansion / contraction continuous body C23 and the second expansion / contraction continuous body C24 in a form in which the extension stress of the first expansion / contraction continuous body C23 and the extension stress of the second expansion / contraction continuous body C24 are different. Also good. When both the first stretchable continuum C23 and the second stretchable continuum C24 are swung and arranged, the force in the orthogonal direction CD by both the stretchable continuums can be divided, and the contraction force along the orthogonal direction CD can be obtained. It can be suppressed more. Moreover, when cutting both the 1st expansion-contraction continuous body C23 and the 2nd expansion-contraction continuous body C24, in order to suppress the shrinkage | contraction of orthogonal direction CD effectively, an expansion / contraction member with a high extension stress is used for an expansion / contraction member with a low extension stress. It is preferable to cut more than.

Cutting step S3 cuts the stretch continuum between the intersections P1, P2 where the first stretch continuum C23 and the second stretch continuum C24 intersect. Of the two stretchable continuous bodies that intersect, at least one may be cut, but both of the two stretchable continuous bodies that intersect may be cut. When the first expansion / contraction continuous body C23 and the second expansion / contraction continuous body C24 intersect, the positions of the first expansion / contraction continuous body C23 and the second expansion / contraction continuous body C24 in the orthogonal direction CD are interchanged, so that more force is generated to contract in the orthogonal direction CD. Easy to do. By cutting the stretchable continuum in the region between the intersection point P1 and the intersection point P2, the force can be divided at a place where the force that contracts in the orthogonal direction CD is more likely to be generated, and the front waistline continuum C20 contracts in the orthogonal direction CD. Can be effectively suppressed. In addition, the location cut | disconnected between intersections may be the location between several intersections in 1 product, and may be the location between the points of the intersection of 1 product and the intersection of adjacent products.

The cutting step S3 can be cut along the thickness direction and cut from the first stretchable continuous body C23 side or the second stretchable continuous body C24 side in the vicinity of the intersection. In the form in which the first expansion / contraction continuous body C23 parallel to the conveyance direction MD intersects with the swinged second expansion / contraction continuous body, the cutting step S3 is performed even if the expansion / contraction continuous body is cut from the second expansion / contraction continuous body C24 side. Good. By cutting the stretchable continuous body from the second stretchable continuous body C24 side, the first stretchable continuous body C23 is cut after the second stretchable continuous body C24 is cut. The first expansion / contraction continuous body C23 is difficult to be sandwiched between the second expansion / contraction continuous body C24 and the cutting blade, and the cutting blade can be applied to the intended position of the second expansion / contraction continuous body C24. The cutting position of the second expansion / contraction continuous body C24 Can be stabilized. By cutting the second stretchable continuum C24 at the intended position, the force in the orthogonal direction can be divided at the intended position.

In the form in which the first expansion / contraction continuous body C23 parallel to the transport direction MD and the swinged second expansion / contraction continuous body intersect, the cutting step S3 cuts the expansion / contraction continuous body from the first expansion / contraction continuous body C23 side. May be. By cutting the stretchable continuous body from the first stretchable continuous body C23 side, the second stretchable continuous body C24 is cut after the first stretchable continuous body C23 is cut. The 1st expansion-contraction continuous body C23 is along the conveyance direction MD, and does not have the contraction force along orthogonal direction CD. The force along the orthogonal direction CD does not change when the first stretchable continuous body C23 is cut, and the positional deviation of the front waistline continuous body C20 in the orthogonal direction CD can be suppressed. Therefore, the cutting position of the second stretchable continuous body C24 can be stabilized.

The cutting step S3 may cut a region along the transport direction MD of the stretchable continuum in the swing region SR. The region along the conveyance direction MD of the stretchable continuous body is a region arranged in the non-coating region in the oscillating region SR, and is arranged by oscillating, but is not fixed by the adhesive, and is in the conveyance direction MD. It is the area displaced along. The expansion / contraction continuous body cut | disconnected by cutting step S3 shrink | contracts along the direction extended before cutting | disconnection. By cutting the region along the conveyance direction MD, the contracted stretchable continuous body is easily arranged along the conveyance direction MD, and it is difficult to cause an uncomfortable appearance. Moreover, if the expansion / contraction continuous body is cut, the contraction force along the direction extending before cutting is divided. By cutting the stretchable continuous body in the region along the conveyance direction MD, the contraction force changes only by the force along the conveyance direction MD, and the force change along the orthogonal direction CD hardly occurs. The length in the orthogonal direction CD of the body is easy to stabilize. Therefore, the cutting position can be stabilized when continuously cutting a plurality of stretchable continuous bodies.

The cutting step S3 may cut only one part of each stretchable continuum. For example, when trying to cut each expansion / contraction continuous body at a plurality of locations, the expansion / contraction continuous body contracts every time one cut is performed, and then the cutting position at the time of cutting is difficult to stabilize. By cutting only one portion of each stretchable continuous body, the cutting position is stabilized. In addition, the stretchable continuum between the plurality of cut portions remains in a contracted state without being continuous with other stretchable continuums. By cutting only one place of each stretchable continuum, it is possible to suppress the stretchable continuum from remaining in a contracted state, and to suppress the uncomfortable appearance.

In the expansion / contraction member arrangement step S2, at least a part of the first expansion / contraction continuous body C23 and at least a part of the second expansion / contraction continuous body C24 may be disposed by swinging in the orthogonal direction CD. At least a part is a part of a region in one stretch continuum. Both the first stretch continuum C23 and the second stretch continuum C24 are displaced in the orthogonal direction CD, and the waistline continuum includes the contraction force in the orthogonal CD by the first stretch continuum C23, and the second The contraction force in the orthogonal direction CD by the stretchable continuum C24 is applied. The waistline continuum receives contraction forces acting in a plurality of directions, and it is difficult to keep the length in the orthogonal direction CD constant. In the absorbent article thus configured, by cutting the stretchable continuum in the swing region SR, the shrinkage of the waistline continuum in the orthogonal direction CD is effectively suppressed, and the absorbent article having the intended shape is obtained. Obtainable.

Further, in the expansion / contraction member arrangement step S2, the first expansion / contraction continuous body C23 is disposed in parallel to the transport direction MD, and at least a part of the second expansion / contraction continuous body C24 is disposed by swinging in the orthogonal direction CD. Good. Thus, in the form in which the first expansion / contraction continuous body C23 and the second expansion / contraction continuous body C24 are arranged, it is preferable to cut at least the second expansion / contraction continuous body C24 in the cutting step S3. In the vicinity of the intersection where the first stretchable continuum C23 and the second stretchable continuum C24 intersect, the position of the first stretchable continuum C23 is easily displaced in the longitudinal direction by the contraction force of the second stretchable continuum C24. By cutting at least the second expansion / contraction continuous body C24 in the swing region SR, the force in the contraction direction of the second expansion / contraction continuous body C24 can be divided, and the intended contraction mode by the first expansion / contraction continuous body C23 can be easily realized.

Next, a method for manufacturing an absorbent article according to a modification will be described with reference to FIG. In the method for manufacturing an absorbent article according to the modified example, in the elastic member arranging step S2, the first elastic continuous body C23 is arranged in parallel to the conveying direction MD, and the second elastic continuous body C24 is swung in the orthogonal direction CD. Let them be arranged. The intersection points P3 and P4 of the first stretchable continuum C23 and the second stretchable continuum C24 have the same position in the orthogonal direction CD. On the one side CD1 in the orthogonal direction CD with respect to the intersections P3 and P4, only the second stretchable continuum C24 is disposed. A plurality of first stretchable continuums C23 are arranged on the other side CD2 in the orthogonal direction CD with respect to the intersections P3 and P4. The one side CD1 is one side of the orthogonal direction CD with respect to a straight line connecting the intersection point P1 and the intersection point P2.

In the expansion / contraction member arrangement step S2, the second expansion / contraction continuous body C24 is disposed so as to sandwich the non-expansion / contraction region R11 in which the first expansion / contraction continuous body C23 is not disposed in the transport direction MD on the one side CD1. In FIG. 7, the non-stretchable region R11 is shown with a dot pattern. Prior to the cutting step S3, the second stretch continuum C24 disposed across the non-stretchable region R11 is not continuously located on one side CD1, but is spaced apart and is continued on the other side CD2. . The cutting step S3 cuts a portion R12 where the second stretchable continuous body C24 disposed across the non-stretchable region R11 extends on the other side CD2 on the other side CD2.

The non-stretchable region R11 is sandwiched between the second stretchable continuum C24 and the first stretchable continuum C23 is not disposed, so that the non-stretchable region R11 is easily shrunk due to the influence of the stretchable continuum disposed around. In addition, the second stretch continuum C24 disposed across the non-stretchable region R11 extends to the other side CD2 beyond the intersections P3 and P4, and a relatively large force is generated to contract in the orthogonal direction CD. By cutting the second stretchable continuum C24 arranged with the non-stretchable region R11 interposed therebetween, the shrinkage force applied to the nonstretchable region R11 can be reduced, and the shrinkage of the waistline continuum in the orthogonal direction CD can be suppressed.

As described above, the present invention has been described in detail using the above-described embodiments. However, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

In addition, although the above-mentioned embodiment demonstrated the manufacturing method of the front waistline continuum, the manufacturing method of the absorbent article which concerns on this Embodiment is applicable also to manufacture of a back waistline continuum.

The manufacturing method of the absorbent article which can suppress the shrinkage | contraction of the longitudinal direction of the waist area by the waist elastic member, and can manufacture the absorbent article of the intended shape can be provided.

1: Absorbent article 10: Absorbent body 20: Front waistline member (trunk member)
C20: Front waistline continuum (waistline continuum)
21: Front waistline stretchable member 23: First stretchable member C23: First stretchable continuous body 24: Second stretchable member C24: Second stretchable continuous body 30: Rear waistline member (trunkline member)
31: Rear waistline elastic member L: Longitudinal direction W: Width direction MD: Transport direction CD: Orthogonal direction S1: waistline transport step S2: Stretch member placement step S3: Cutting step

Claims

An absorbent main body including an absorbent body and having a longitudinal direction and a width direction orthogonal to the longitudinal direction, a waistline member constituting a front waistline region or a back waistline region, and a waistline elastic member extending in the width direction are provided. ,
The waistline member is a method for manufacturing an absorbent article, wherein the length in the longitudinal direction is constant,
A waistline conveying step in which the waistline member conveys a waistline continuum continuous in the width direction;
Extending the stretchable continuum in which the waistline stretchable member is continuous, and the stretchable member placement step of placing the stretchable continuum on the waistline continuum;
A cutting step for cutting the stretchable continuous body,
The expansion / contraction member disposing step arranges the expansion / contraction continuous body in the non-oscillation region along the conveyance direction of the waistline continuum, and swings in the orthogonal direction perpendicular to the conveyance direction in the oscillation region. Place the body,
The said cutting step is a manufacturing method of an absorbent article which cut | disconnects the said expansion-contraction continuous body in the said rocking | fluctuation area | region.
The stretchable continuum has a first stretchable continuum and a second stretchable continuum that intersects the first stretchable continuum,
The said cutting step is a manufacturing method of the absorbent article of Claim 1 which cut | disconnects the said expansion-contraction continuous body between the intersections which a said 1st expansion-contraction continuous body and a said 2nd expansion-contraction continuous body cross | intersect.
3. The absorbent article according to claim 2, wherein in the elastic member arranging step, at least a part of the first elastic continuum and at least a part of the second elastic continuum are arranged to swing in the orthogonal direction. Production method.
In the expansion / contraction member arrangement step, the first expansion / contraction continuous body is disposed in parallel to the transport direction, and at least a part of the second expansion / contraction continuous body is swung in the orthogonal direction,
The method of manufacturing an absorbent article according to claim 2, wherein the cutting step cuts at least the second stretchable continuous body.
The elastic member arrangement step arranges the first elastic continuous body and the second elastic continuous body so as to overlap in the thickness direction,
The said cutting step is a manufacturing method of the absorbent article of Claim 4 which cut | disconnects the said expansion-contraction continuous body from the said 1st expansion-contraction continuous body side.
The elastic member arrangement step arranges the first elastic continuous body and the second elastic continuous body so as to overlap in the thickness direction,
The said cutting step is a manufacturing method of the absorbent article of Claim 4 which cut | disconnects the said expansion-contraction continuous body from the said 2nd expansion-contraction continuous body side.
The stretching member disposing step separates the second stretchable continuous body so as to sandwich a non-stretchable region where the first stretchable continuous body is not disposed on the one side in the orthogonal direction with respect to the intersection. Place and
The absorption according to any one of claims 2 to 6, wherein the cutting step cuts the second stretchable continuum disposed across the non-stretchable region on the other side in the orthogonal direction with respect to the intersection. A method for producing a functional article.
The said expansion-contraction member arrangement | positioning step arrange | positions the said expansion-contraction continuous body so that the extension stress of a 1st expansion-contraction continuous body and the extension stress of a said 2nd expansion-contraction continuous body may differ. Manufacturing method for absorbent articles.
The method for manufacturing an absorbent article according to claim 8, wherein the cutting step cuts at least the stretch continuum having a high elongation stress among the first stretch continuum and the second stretch continuum.
The method of manufacturing an absorbent article according to any one of claims 1 to 9, wherein the cutting step cuts a region along the transport direction of the stretchable continuous body.
The said cutting step is a manufacturing method of the absorbent article in any one of Claims 1-10 which cut | disconnects only one place of each expansion-contraction continuous body.