JP2020171421A - Manufacturing method for absorbent article - Google Patents

Abstract

To provide a manufacturing method for an absorbent article capable of bonding a waist band to a skin surface sheet as intended.SOLUTION: A first transportation step has a transportation step in a circumferential direction in which a revolving drum device is used to transport a band continuum in a circumferential direction CID in a state where the band continuum is held by at least one of a plurality of holding parts 132 so that each of a pair of side bonding area SBR overlaps with at least one of a plurality of suction holes 135. In a cutting step, the band continuum, spanning at least two holding parts 132 of the plurality of holding parts 132 by transportation in the circumferential direction CID, is cut. In a second transportation step, a waist band is transported to the body continuum while maintaining the state where each of the pair of side bonding area SBR overlaps at least any of the plurality of suction holes 135.SELECTED DRAWING: Figure 9

Description

The present invention relates to a method for producing an absorbent article.

Patent Document 1 discloses an absorbent article that is arranged on the skin surface side of the skin surface sheet and has a waistband that is elastic in the width direction (see, for example, Patent Document 1).

In the absorbent article of Patent Document 1, a space that opens toward the inseam region side is formed by joining the waistband to the skin surface sheet via an adhesive. The space functions as a pocket for accommodating excrement moving to the waist opening side, and can prevent excrement from leaking from the waist opening.

US Patent Publication No. 2018/71155

Since the waistband has elasticity, when the waistband is joined to the skin surface sheet, the waistband may be wrinkled or the waistband may be rolled up due to shrinkage. For this reason, there is a risk that the waistband cannot be joined to the skin surface sheet in a shape aimed at.

Further, the waistband is manufactured by cutting the band continuum having elasticity and the sheet material constituting the waistband includes a continuous sheet continuum. During this cutting, a force is applied to the band continuum, which may cause the position of holding the manufactured waistband to shift. As a result, there is a risk that the waistband will be joined to the skin side sheet in a state of being displaced.

Therefore, a method for producing an absorbent article capable of joining the waistband to the skin surface sheet as intended is desired.

In the method for producing an absorbent article according to one aspect, the absorbent article is arranged in the front-rear direction, the width direction orthogonal to the front-rear direction, the skin surface sheet, and the skin surface side of the skin surface sheet. A pair of a waistband having elasticity in the width direction and an adhesive for joining the waistband and the skin surface sheet on both outer sides in the width direction from the center of the waistband in the width direction. It has a side junction area. The method for producing the absorbent article includes a step of transporting a band continuous body in which the band sheet material constituting the waistband includes a continuous band sheet continuous body and having elasticity, and the adhesive to the band continuous body. The step of providing the pair of side joint regions by applying the adhesive, the step of cutting the band continuum coated with the adhesive, and the waistband obtained by cutting the band continuum are applied to the skin surface. In the step of transporting the sheet material constituting the sheet to the main body continuous body including the continuous main body continuous body and in the delivery of the waist band to the main body continuous body, the waist band is transferred to the main body continuous body via the adhesive. It is provided with a step of joining to. In the step of transporting the band continuum, each of the pair of side joint regions is formed with at least one of the plurality of suction holes by using a rotary drum device having a plurality of holding portions having a plurality of suction holes formed therein. It has a step of transporting the band continuum in the circumferential direction while the band continuum is held by at least one of the plurality of holding portions so as to overlap each other. In the step of cutting the band continuum, the band continuum straddling at least two of the plurality of holding portions is cut by the transportation in the circumferential direction. In the step of transporting the waistband, the waistband is transported to the main body continuum while maintaining a state in which each of the pair of side joint regions overlaps at least one of the plurality of suction holes.

FIG. 1 is a schematic plan view of the absorbent article according to the embodiment as viewed from the skin surface side. FIG. 2 is a schematic cross-sectional view taken along the 2A-2A cross section of the absorbent article shown in FIG. FIG. 3 is a schematic cross-sectional view taken along the line BB shown in FIG. 1 in the extended state. FIG. 4 is a diagram showing a wearing state of the absorbent article 10 based on the cross section shown in FIG. FIG. 5 is a schematic plan view for explaining the waistband in the extended state. FIG. 6 is a schematic view for explaining a manufacturing process of an absorbent article. FIG. 7 is a schematic perspective view showing a rotating drum device. FIG. 8 is a schematic plan view showing a rotating drum device. FIG. 9 is a schematic view for explaining the holding portion. FIG. 10 is a diagram (No. 1) schematically showing a method for producing an absorbent article. FIG. 11 is a diagram (No. 2) schematically showing a method for producing an absorbent article.

(1) Outline of Embodiment At least the following matters will be clarified by the description of this specification and the accompanying drawings.

In the method for producing an absorbent article according to one aspect, the absorbent article is arranged in the front-rear direction, the width direction orthogonal to the front-rear direction, the skin surface sheet, and the skin surface side of the skin surface sheet. A pair of a waistband having elasticity in the width direction and an adhesive for joining the waistband and the skin surface sheet on both outer sides in the width direction from the center of the waistband in the width direction. It has a side junction area. The method for producing the absorbent article includes a step of transporting a band continuous body in which the band sheet material constituting the waistband includes a continuous band sheet continuous body and having elasticity, and the adhesive to the band continuous body. The step of providing the pair of side joint regions by applying the adhesive, the step of cutting the band continuum coated with the adhesive, and the waistband obtained by cutting the band continuum are applied to the skin surface. In the step of transporting the sheet material constituting the sheet to the main body continuous body including the continuous main body continuous body and in the delivery of the waist band to the main body continuous body, the waist band is transferred to the main body continuous body via the adhesive. It is provided with a step of joining to. In the step of transporting the band continuum, each of the pair of side joint regions is formed with at least one of the plurality of suction holes by using a rotary drum device having a plurality of holding portions having a plurality of suction holes formed therein. It has a step of transporting the band continuum in the circumferential direction while the band continuum is held by at least one of the plurality of holding portions so as to overlap each other. In the step of cutting the band continuum, the band continuum straddling at least two of the plurality of holding portions is cut by the transportation in the circumferential direction. In the step of transporting the waistband, the waistband is transported to the main body continuum while maintaining a state in which each of the pair of side joint regions overlaps at least one of the plurality of suction holes.

Since the air permeability of the side joint region is reduced by the adhesive, the portion of the band continuum that overlaps the side joint region (hereinafter, the joint overlapping portion) is the portion of the band continuum that does not overlap the joint region (hereinafter, non-joint region). It is easier to be adsorbed than the joint overlapping part). Therefore, by holding the band continuum and the waistband so that each of the pair of side joint regions overlaps at least one of the plurality of suction holes, the pair of joint overlapping portions can be strongly adsorbed. This makes it difficult for the pair of joining overlapping portions to move, and the pair of joining overlapping portions can be fixed. In order for the portion between the pair of joint overlapping portions to shrink, the pair of joint overlapping portions must also shrink together. Therefore, by fixing the pair of joint overlapping portions, the portion between the pair of joint overlapping portions can be contracted. It is also possible to suppress the contraction of the portion. Therefore, although the band continuum and the waistband have elasticity, in the step of transporting the band continuum and the step of transporting the waistband, the contraction of the band continuum and the waistband is suppressed to prevent the waistband. Can be joined to the skin sheet as intended.

In addition, since the band continuum is conveyed in the circumferential direction until it straddles at least two holding portions, the portion extending in the circumferential direction of the band continuum receives a force in the direction of the rotation center of the rotating drum device. Therefore, when the band continuum conveyed in the circumferential direction is pressed against the holding portion, a strong frictional force acts between the portion extending in the circumferential direction of the band continuum and the holding portion, and the contraction of the band continuum is further reduced. It is suppressed. As a result, the band continuum can be cut while the band continuum is firmly fixed to the holding portion, and the holding position of the waistband can be suppressed from being displaced due to the cutting.

Since the waistband is transported to the main body continuum while maintaining the state where each of the pair of side joint regions overlaps with at least one of the plurality of suction holes, the waistband is held firmly on the skin side sheet. Can be joined to. As a result, the waistband can be joined to the skin sheet as intended.

According to a preferred embodiment, the band continuum has a plurality of sheet layers formed by overlapping the band sheet continuums in the thickness direction, and in the step of transporting the band continuum, the thickness The sheet layer having the highest elastic force among the sheet layer arranged on the outermost side on one side in the direction and the sheet layer arranged on the outermost side on the other side in the thickness direction abuts on the holding portion. , The rotating drum device receives the band continuum.

The closer it is to the holding portion, the stronger it is adsorbed. Therefore, the rotating drum device receives the band continuum so that the holding portion abuts on the sheet layer having a high elastic force, that is, the sheet layer that easily shrinks. Can be transported in a strongly adsorbed state. As a result, it is possible to prevent the band continuum from contracting during transportation.

According to a preferred embodiment, the band continuum has a plurality of sheet layers formed by overlapping the band sheet continuums in the thickness direction, and in the step of transporting the band continuum, the plurality of the band sheet continuums. The rotating drum device receives the band continuum so that a band joining region in which adjacent sheet layers of the sheet layers are joined overlaps at least one of the plurality of suction holes.

Since the band bonding region has low air permeability, the portion overlapping the band bonding region can be strongly adsorbed as compared with the portion not overlapping the band bonding region. Therefore, by overlapping the suction hole with the band joining region, the band continuum and the waist band can be held more firmly.

According to a preferred embodiment, in the step of transporting the waistband, the holding portion is rotated by 90 degrees around the rotation axis along the radial direction of the rotary drum device to the delivery point of the waistband.

The arrangement direction of the waistband can be rotated by 90 degrees before the waistband is delivered to the main body continuum. Therefore, due to the arrangement of the equipment, even if the arrangement direction of the manufactured waistband deviates by 90 degrees from the target arrangement, the transfer direction of the band continuum and the transfer direction of the main body continuum can be overlapped in the orthogonal direction. it can.

According to a preferred embodiment, the waistband is a non-stretchable region extending inward in the width direction from the widthwise edge of the waistband and to which the stretchable elastic member is not joined. In the step of transporting the waistband having a region, the waistband is transported in a state where the non-stretchable region overlaps with at least one of the plurality of suction holes.

In the non-stretchable region, wrinkles are unlikely to be formed at the end of the waistband because shrinkage due to the elastic member does not occur. Therefore, the state in which the waistband is close to the suction hole can be maintained on the entire surface of the end portion (non-stretchable region) of the waistband, and the waistband is easily strongly sucked. As a result, the waistband can be suppressed from contracting, and the waistband can be joined to the skin surface sheet as intended.

According to a preferred embodiment, the holding portion has a contact surface that contacts the band continuum, and the contact surface is a central contact surface that is centrally located in the transport direction of the band continuum. And an outer contact surface arranged so as to sandwich the central contact surface in the transport direction and having the plurality of suction holes formed therein, and the friction coefficient of the outer contact surface is the center. In the step of transporting the band continuum, which is higher than the friction coefficient of the contact surface, the rotating drum device receives the band continuum so that the outer contact surface abuts on the band continuum.

As a result, on the outer contact surface, the band continuum and the waist band are less likely to shrink due to friction as compared with the central contact surface, and the pair of joint overlapping portions can be further fixed. As a result, the waistband can be joined to the skin sheet as intended so that the band continuum and the waistband can be held more firmly.

According to a preferred embodiment, the holding portion has a contact surface that contacts the band continuum, and the contact surface is a central contact surface that is arranged at the center in the transport direction of the band continuum. And a pair of outer contact surfaces arranged so as to sandwich the central contact surface in the transport direction and having the plurality of suction holes formed therein, and the pair of outer contact surfaces is the center. By inclining the rotating drum device toward the rotation axis side with respect to the contact surface, a pair of corner portions are provided between the pair of outer end contact surfaces and the central contact surface, and the band continuum In the step of transporting the band continuous body in the circumferential direction, the band continuous body is transported in the circumferential direction so that the band continuous body straddles each of the pair of corner portions.

The band continuum is strongly held by the suction holes on the pair of outer contact surfaces, and the band continuum is strongly pressed against the holding portion at the corners by straddling each of the pair of corners. As a result, a strong frictional force acts between the band continuum and the corner portion (holding portion), and the contraction of the band continuum is further suppressed. As a result, the band continuum is firmly fixed to the holding portion.

(2) Schematic Configuration of Absorbent Articles Hereinafter, an example of an absorbent article produced by using the method for producing an absorbent article according to the embodiment will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratio of each dimension is different from the actual one. Therefore, the specific dimensions, etc. should be determined in consideration of the following explanation. In addition, there may be a portion in which the relationship and ratio of dimensions of the drawings are different from each other.

The absorbent article 10 is a tape-type disposable diaper. FIG. 1 is a schematic plan view of the absorbent article according to the embodiment as viewed from the skin surface side. FIG. 2 is a schematic cross-sectional view taken along the 2A-2A cross section of the absorbent article shown in FIG. In the schematic cross-sectional view shown in FIG. 2, for convenience of explanation, the members are shown separated in the thickness direction T, but in an actual product, they are in contact with the thickness direction T. 1 and 2 show an stretchable absorbent article. The stretched state in the present specification is a state in which the absorbent article 10 is stretched to a state in which wrinkles are not formed. Further, the natural state in the present specification means that, in the case of the absorbent article 10 contained in the package, the absorbent article 10 is taken out from the package, and the relative humidity is 60% ± 5% RH at 20 ° C. ± 2 ° C. It has been left for 24 hours in an atmosphere. FIG. 3 is a schematic cross-sectional view taken along the front-rear direction of the absorbent article in the extended state. FIG. 3A is a schematic cross-sectional view taken along the line 3A-3A shown in FIG. 1 in the extended state. FIG. 3B is a schematic cross-sectional view taken along the line 3B-3B shown in FIG. 1 in the extended state. FIG. 4 is a diagram showing a wearing state of the absorbent article 10 based on the cross section shown in FIG. 3A. The BL shown in FIG. 4 shows the line of the wearer's body. FIG. 5 is a schematic plan view for explaining the waistband in the extended state. FIG. 5A is a schematic plan view of the first sheet layer 811 described later as viewed from the skin surface side. FIG. 5B is a schematic plan view of the second sheet layer 812, which will be described later, as viewed from the skin surface side. FIG. 5C is a schematic plan view of the third sheet layer 813, which will be described later, as viewed from the skin surface side.

The absorbent article 10 has a front-rear direction L and a width direction W orthogonal to the front-rear direction L. The anteroposterior direction L is defined by the direction extending to the anterior side and the posterior side of the body. In other words, the anteroposterior direction L is a direction extending anterior-posteriorly in the deployed absorbent article 10. Further, the absorbent article 10 has a thickness direction T. The thickness direction T extends to the skin surface side T1 facing the wearer side and the non-skin surface side T2 opposite to the skin surface side T1.

The absorbent article 10 has a front waist circumference area S1, a rear waist circumference area S2, and an inseam area S3. The front waist circumference area S1 is a region facing the front waist circumference (abdomen) of the wearer. The rear waist circumference area S2 is an area facing the rear waist circumference (back) of the wearer, and includes an area on which the body (buttocks) is placed when worn. The inseam area S3 is an area located in the inseam of the wearer and arranged between the front waist area S1 and the rear waist area S2. Therefore, the inseam region S3 is arranged between the two waist circumference regions including the front waist circumference region S1 and the rear waist circumference region S2. The inseam area S3 is an area provided with a leg circumference opening 65 arranged around the wearer's leg circumference. The leg circumference opening 65 is a portion recessed inward in the width direction W from the outer edge of the absorbent article 10.

The absorbent article 10 is composed of a main body 11 and a waistband 80. The main body 11 is composed of members arranged on the non-skin surface side T2 of the waistband 80. Therefore, the main body portion 11 is composed of members excluding the waistband 80 among the members constituting the absorbent article 10. In the present embodiment, the main body portion 11 (absorbent article 10) has an absorbent core 31, a skin surface sheet 20, a non-skin surface sheet 25, a waist elastic member 45, and a fastening tape 90.

The absorbent core 31 contains an absorbent material such as ground pulp or a highly absorbent polymer (SAP), or a mixture thereof. The absorption core 31 may be covered with a core wrap (not shown). The core wrap may be composed of Tesh or SMS non-woven fabric.

As shown in FIG. 2, the skin surface sheet 20 is located on the skin surface side T1 with respect to the absorption core 31. The skin surface sheet 20 covers the absorbent core 31 and is arranged over the entire absorbent article 10. The skin surface sheet 20 may include a surface sheet 21 and a pair of side sheets 22. In the case of the absorbent article having the core wrap, the skin surface sheet 20 is a sheet located on the skin surface side T1 with respect to the core wrap.

The surface sheet 21 may be arranged so as to straddle the center of the absorption core 31 in the width direction W. The pair of side sheets 22 may be arranged so as to cover both outer portions of the surface sheet 21. The surface sheet 21 and the side sheet 22 may be made of a liquid-permeable sheet such as a non-woven fabric or a perforated plastic film.

The non-skin surface sheet 25 is located on the non-skin surface side T2 of the absorption core 31. The non-skin surface sheet 25 covers the absorbent core 31 and is arranged throughout the absorbent article 10. The non-skin surface sheet 25 may include a back surface sheet 23 and an exterior sheet 24. In the case of an absorbent article having a core wrap, the non-skin surface sheet 25 is a sheet located on the non-skin surface side T2 of the core wrap.

The back sheet 23 is a liquid-impermeable sheet, and a breathable resin film is bonded to a polyethylene sheet, a laminated non-woven fabric mainly made of polypropylene or the like, a breathable resin film, a spunbond, or a non-woven fabric such as spunlace. A sheet or the like can be used. The exterior sheet 24 may be provided on the non-skin surface side T2 of the back surface sheet 23. The exterior sheet 24 may be made of a liquid-permeable non-woven fabric.

The waist elastic member 45 is an elastic member that is arranged at least in the rear waist circumference region S2 and has elasticity in the width direction W. Due to the contraction of the waist elastic member 45, the absorbent article 10 fits around the waist when worn. The waist elastic member 45 may be provided between the side sheet 22 and the back surface sheet 23, and between the side sheet 22 and the exterior sheet 24. The waist elastic member 45 may be composed of a substantially rectangular elastic sheet that expands and contracts in the width direction W. The waist elastic member 45 may be joined between the absorption core 31 and the non-skin surface sheet 25 or between the skin surface sheet 20 and the non-skin surface sheet 25 in a state of being extended in the width direction W.

The fastening tape 90 is provided in the rear waist circumference region S2. The fastening tape 90 has a base portion 92 and a locking portion 93. At least a part of the base portion 92 is joined between the skin surface sheet 20 and the non-skin surface sheet 25, and extends from the skin surface sheet 20 and the non-skin surface sheet 25 to the outside in the width direction W. The locking portion 93 is provided on the base portion 92 and is detachably fastened to the target portion 95 (see FIG. 1). The fastening tape 90 extends along the width direction W in the rear waist circumference region S2 and is fastened to the target portion 95 to hold the absorbent article 10 on the wearer's body. The target portion 95 is arranged in the front waist circumference region S1 and is configured so that the fastening tape 90 is fixed to each other.

The waistband 80 is arranged on the skin surface side T1 of the skin surface sheet 20 (see FIGS. 2 and 3). The waistband 80 has elasticity in the width direction W. The waistband 80 may be arranged in at least one of the front waist circumference area S1 and the rear waist circumference area S2. In the present embodiment, the waistband 80 is arranged in the rear waist circumference region S2. The waistband 80 is joined to the skin surface sheet 20 (main body portion 11) via an adhesive (joining portion 83). The front edge of the waistband 80 may be located inside the front edge of the absorbent article 10 in the stretched state of the absorbent article 10 (see FIG. 1) and overlaps the anterior edge of the absorbent article 10. May be good.

The waist band 80 includes a plurality of sheet layers 81 formed by overlapping band continuums 80C (band sheet materials) described later in the thickness direction T, and a band elastic member 82 bonded to at least one of the sheet layers 81. And may have.

In the present embodiment, the plurality of sheet layers 81 are composed of a first sheet layer 811, a second sheet layer 812, and a third sheet layer 813. The plurality of sheet layers 81 are made of the same band sheet material by folding back the same band sheet material.

The first sheet layer 811 is arranged on the skin surface side T1 of the plurality of sheet layers 81. The second sheet layer 812 is arranged between the first sheet layer 811 and the third sheet layer 813. The third sheet layer 813 is arranged on the most non-skin surface side T2 of the plurality of sheet layers 81. The first sheet layer 811 is arranged on the outermost side on one side in the thickness direction T, and the third sheet layer 813 is arranged on the outermost side on the other side in the thickness direction T.

The band elastic member 82 is a member that expands and contracts in the width direction W. The band elastic member 82 is composed of a thread-shaped or band-shaped elastic member. The band elastic member 82 is fixed to the sheet layer 81 in a state of being extended in the width direction W. As a result, the waistband 80 has elasticity in the width direction W. In the embodiment, the band elastic member 82 is fixed to the non-skin surface side T2 of the third sheet layer 813. In the present embodiment, the band elastic member 82 is composed of the first band elastic member 821 to the fourth band elastic member 824.

The plurality of sheet layers 81 are joined by a joining portion 83. Specifically, the first sheet layer 811 is joined to the skin surface sheet 20 via the first joint portion 831. Further, the first sheet layer 811 and the second sheet layer 812 are joined via the second joint portion 832. The second sheet layer 812 and the third sheet layer 813 are joined via a third joint portion 833. Therefore, the joint portion 83 is a joint portion (first joint portion 831) for joining the waist band 80 (first sheet layer 811) to the skin surface sheet 20 and a joint portion 83 (second joint portion) for joining the waist bands 80 to each other. It may be composed of a portion 832 and a third joint portion 833).

The absorbent article 10 has a joint region BR in which the skin surface sheet 20 (main body portion 11) and the waistband 80 are joined. The joint region BR is composed of the first joint portion 831. The junction region BR has a central junction region CBR and a pair of side junction regions SBR (see FIG. 5A). The central joining region CBR is a region to which an adhesive for joining the waist band 80 and the skin surface sheet 20 is applied at the center of the waist band 80 in the width direction W. The pair of side joining regions SBR are regions to which an adhesive for joining the waist band 80 and the skin surface sheet 20 is applied on both outer sides of the waist band 80 in the width direction W rather than the center of the width direction W. As the adhesive, for example, a hot melt type adhesive (HMA) can be used. The center of the waistband 80 in the width direction W is a region having a predetermined width including the center of the waistband 80 in the width direction W. The center of the waistband 80 in the width direction W may be defined by the width of the accommodation space AS described later. The region outside the accommodation space AS in the width direction W may be the side joint region SBR.

The absorbent article 10 (waist band 80) has a band bonding region BBR in which the waist bands 80 are bonded to each other. Therefore, the band bonding region BBR is a region in which adjacent sheet layers 81 of the plurality of sheet layers 81 are bonded to each other. In the present embodiment, the band joining region BBR is via the first band joining region BBR1 in which the first sheet layer 811 and the second sheet layer 812 are joined via the second joining portion 832, and the third joining portion 833. It has a second band bonding region BBR2 in which the second sheet layer 812 and the third sheet layer 813 are bonded.

Further, the waistband 80 has a stretchable region STR having elasticity and a non-stretchable region NSTR having no stretchability. As shown in FIGS. 2 and 5C, in the width direction W, the region where the band elastic member 82 is arranged is the stretchable region STR, and the region where the band elastic member 82 is not arranged is the non-stretchable region NSTR. The non-stretchable region NSTR is a region extending inward in the width direction W from the edge 80E in the width direction W of the waistband 80, and is a region in which the band elastic member 82 is not joined. Since the band elastic member 82 is joined to the third sheet layer 813, the elastic force of the third sheet layer 813 is higher than the elastic force of the first sheet layer 811.

The elastic force of each sheet layer 81 can be measured by, for example, the following method. The length H0 in the width direction W of the effective length portion of the sheet layer 81 is measured in a state where the sheet layer 81 is extended to the maximum in the front-rear direction L so that the wrinkles generated in the sheet layer 81 cannot be visually recognized. Next, the length H1 of the sheet layer 81 in the width direction W in the natural state is measured. Then, the contraction force of the sheet layer 81 can be calculated by "stretching force = H1 / H0".

As shown in FIG. 4, the absorbent article 10 is formed with a space (accommodation space AS) that opens toward the inseam area S3 side. Since the waistband 80 has elasticity, when the main body 11 is separated from the wearer's body, the unjoined portion of the waistband 80 rises from the skin sheet 20. The storage space AS functions as a pocket for storing excrement moving toward the waist opening 66 side. As a result, it is possible to prevent excrement from leaking from the waist opening 66. The waist opening 66 is composed of a rear end edge and a front end edge of the absorbent article 10, and is a portion surrounding the waist circumference with the fastening tape 90 fixed to the target portion 95.

(3) Configuration of Manufacturing Device for Absorbent Articles Next, the configuration of the manufacturing device 100 for the absorbent article 10 will be described with reference to FIGS. 6 to 9. FIG. 6 is a schematic view for explaining a manufacturing process of an absorbent article. FIG. 7 is a schematic perspective view showing a rotating drum device. FIG. 8 is a schematic plan view showing a rotating drum device. FIG. 9 is a schematic view for explaining the holding portion. 9A and 9B are schematic views of the holding portion 132 as viewed from the suction surface side. FIG. 9C is a schematic cross-sectional view of the holding portion 132. Note that FIG. 9B shows a state in which the holding portion 132 holds the waistband 80. FIG. 9C shows a state in which the holding portion 132 holds the band continuum 80C.

As shown in FIG. 6, the manufacturing apparatus 100 of the absorbent article 10 may include a joining apparatus 110, a folding apparatus 120, a rotary drum apparatus 130, and a cutting apparatus 140.

The joining device 110 is a device for providing the joining portion 83. The joining device 110 includes a first joining device 111 for providing the first joining portion 831, a second joining device 112 for providing the second joining portion 832, and a third joining device for providing the third joining portion 833. 113 and may have.

The folding device 120 is a device for folding the band continuum 80C (band sheet material). The folding device 120 may include a first folding device 121 and a second folding device 122. The rotary drum device 130 includes a rotary drum 131 and a plurality of holding portions 132 in which a plurality of suction holes 135 are formed.

The rotary drum device 130 is a device that conveys the band continuum 80C and the waistband 80 in the circumferential direction CID by rotating with respect to the rotation shaft 131A. The rotary drum device 130 receives the band continuum 80C on the holding portion 132 at the receiving point P1, and conveys the band continuum 80C along the circumferential CID of the rotary drum 131 as the rotary drum 131 rotates. Further, the rotary drum device 130 conveys the waistband 80 obtained by cutting the band continuum 80C along the circumferential CID, and delivers the waistband 80 to the main body continuum 11C described later at the delivery point P2.

The rotary drum device 130 may change the direction of the waistband 80 by rotating the holding portion 132 around the rotary shaft 132A along the radial RD of the rotary drum 131. The rotating drum 131 may have a rotating mechanism in the rotating drum 131. Specifically, the rotating drum 131 may rotate the holding portion 132 by 90 degrees by a rotating mechanism while the holding portion 132 is conveyed to the main body continuous body 11C. Further, the rotating drum 131 may rotate the holding portion 132 by 90 degrees by the rotating mechanism while the holding portion 132 is conveyed to the receiving point P1.

The holding portion 132 holds the band continuum 80C and the waistband 80. The holding portion 132 is provided on the outer periphery of the rotating drum 131.

The holding portion 132 has a contact surface 133 that abuts on the band continuum 80C and the waistband 80. The contact surface 133 may have a central contact surface 133A and a pair of outer contact surfaces 133B. The central contact surface 133A is arranged at the center of the band continuum 80C in the transport direction MD1 (specifically, the transport direction MD1 at the receiving point P1). The outer contact surface 133B is arranged so as to sandwich the central contact surface 133A in the transport direction MD1, and a plurality of suction holes 135 are formed.

The holding portion 132 has at least two or more suction holes 135. In the present embodiment, four suction holes 135 are formed on each outer contact surface 133B, and the holding portion 132 has eight suction holes 135. By sucking the band continuum 80C arranged on the holding portion 132 from the plurality of suction holes 135, the band continuous body 80C is attracted to the holding portion 132.

The holding portion 132 may have a grip improving means. Since the holding portion 132 has the grip improving means, the contact surface 133 of the holding portion 132 may be subjected to, for example, unevenness treatment, satin finish treatment, Teflon (registered trademark), silicon or the like coating treatment. The friction coefficient of the contact surface 133 subjected to the above treatment may be improved by the grip improving means, and fine irregularities for hooking fibers (band continuum 80C / waist band 80) are formed on the contact surface 133. Good. By performing the above treatment on the outer contact surface 133B of the holding portion 132, the friction coefficient of the outer contact surface 133B may be higher than the friction coefficient of the central contact surface 133A.

The pair of outer contact surfaces 133B is inclined toward the rotation shaft 131A of the rotary drum device 130 with respect to the central contact surface 133A, so that the angle between the pair of outer contact surfaces 133B and the central contact surface 133A is formed. A portion 136 may be provided. The angle θ (angle θ formed by the central contact surface 133A and the outer contact surface 133B) of the corner portion 136 when viewed from the direction along the rotation shaft 131A of the rotary drum device 130 is less than 180 degrees (FIG. FIG. See 9C).

The cutting device 140 is a device that cuts the band continuum 80C. The cutting device 140 may have a cutter blade for cutting the band continuum 80C.

(4) Method for Producing Absorbent Articles Next, a method for producing an absorbent article will be described with reference to FIGS. 1 to 11. FIG. 10 is a diagram (No. 1) schematically showing a method for producing an absorbent article. FIG. 11 is a diagram (No. 2) schematically showing a method for producing an absorbent article. 10 and 11 are schematic views of the band continuum 80C and the waistband 80 viewed from above in the transverse direction TD. 6, 10, and 11 show a part of the process in which the absorbent article 10 is manufactured. In addition, in FIG. 10 and FIG. 11, the cutting line CL cut by the cutting device 140 is shown by a virtual line.

The direction in which the component parts in the manufacturing process are conveyed is shown as the transport direction MD, the direction intersecting the transport direction is shown as the cross direction CD, and the direction orthogonal to the transport direction MD and the cross direction CD is shown as the transverse direction TD. Further, the direction in which the components of the waistband 80 are conveyed is shown as the transfer direction MD1, and the direction in which the components of the main body 11 are conveyed is shown as the transfer direction MD2.

As for the method not described in the present embodiment, an existing method can be used. Further, the manufacturing method described below is an example, and can be manufactured by another manufacturing method.

As shown in FIGS. 6 and 10, the method for producing the absorbent article 10 includes a band forming step S10, a first transport step S20, a cutting step S30, a second transport step S40, and a joining step S50. You may be prepared. In the present embodiment, the method for producing the absorbent article 10 includes coating steps S21, S23, S25 and folding steps S22, S24 performed in parallel with the first transport step S20. The first transfer step S20 includes a circumferential transfer step S26.

In the band forming step S10, the band continuum 80C is formed. The band continuum 80C can be formed by joining the band elastic member continuum 82C to the band sheet continuum 81C while transporting the band sheet continuum 81C in which the band sheet material is continuous.

In the band sheet continuum 81C, the first sheet portion 811p corresponding to the first sheet layer 811, the second sheet portion 812p corresponding to the second sheet layer 812, and the second sheet portion 812p corresponding to the third sheet layer 813. And are lined up on the crossing direction CD. In the crossing direction CD, the third sheet portion 813p is located between the first sheet portion 811p and the second sheet portion 812p.

The band elastic member continuum 82C is arranged on the third sheet portion 813p. The band elastic member continuum 82C is continuous with the transport direction MD1 and is intermittently arranged in the crossing direction CD. As a result, the band continuum 80C has elasticity in the transport direction MD1. In the present embodiment, the band elastic member continuum 82C extends in the transport direction MD1 across the cutting line CL.

In order to join the band sheet continuum 81C and the band elastic member continuum 82C, an adhesive may be applied to the band sheet continuum 81C, or an adhesive may be applied to the band elastic member continuum 82C. .. An adhesive may be applied to the band elastic member continuum 82C so as not to be joined to the band sheet continuum 81C (sheet layer 81) in the vicinity of the cutting line CL. As a result, the non-stretchable region NSTR may be provided in the cutting step S30.

The band sheet material may be made of a non-woven fabric or a liquid-impermeable film. The band elastic member continuum 82C may be composed of a thread-like or band-shaped elastic member.

In the first transfer step S20, the band continuum 80C is conveyed. The following steps are performed while the band continuum 80C is being conveyed.

In the coating step S21, an adhesive is applied to the band continuum 80C to provide the second band bonding region BBR2. Specifically, the third joining device 113 applies an adhesive to the second sheet portion 812p so that the pair of third joining portions 833 are provided at intervals in the transport direction MD1 between the pair of cutting lines CL. It may be applied. The third joining device 113 may apply the adhesive so that the adhesive extends in the crossing direction CD. The band elastic member continuum 82C may be joined to the band sheet continuum 81C by the applied adhesive.

In the folding step S22, the band continuum 80C is folded with the folding line along the transport direction MD1 as the base point. Specifically, the second folding device 122 folds the band continuum 80C so that the second sheet portion 812p is arranged above the third sheet portion 813p. As a result, the second sheet portion 812p and the third sheet portion 813p overlap in the thickness direction T (transverse direction TD). Further, the band elastic member continuum 82C is sandwiched between the second sheet portion 812p and the third sheet portion 813p. The second sheet portion 812p and the third sheet portion 813p are joined by an adhesive to provide a third joining portion 833.

In the coating step S23, an adhesive is applied to the band continuum 80C to provide the first band bonding region BBR1. Specifically, the second joining device 112 applies an adhesive to the second sheet portion 812p so that the pair of second joining portions 832 are provided at intervals in the transport direction MD1 between the pair of cutting lines CL. May be applied to. The second joining device 112 may apply the adhesive so that the adhesive extends in the crossing direction CD.

In the folding step S24, the band continuum 80C is folded with the folding line along the transport direction MD1 as the base point. Specifically, the first folding device 121 folds the band continuum 80C so that the first sheet portion 811p is arranged above the second sheet portion 812p. As a result, the first sheet portion 811p and the second sheet portion 812p overlap in the transverse direction TD (thickness direction). Further, the first sheet portion 811p and the second sheet portion 812p are joined by an adhesive to provide a second joining portion 832.

In the coating step S25, an adhesive is applied to the band continuum 80C to provide a bonding region BR. Specifically, in the coating step S25, a central bonding region CBR and a pair of side bonding regions SBR can be provided. The first joining device 111 may apply an adhesive to the first sheet portion 811p so that the first joining portion 831 is provided between the pair of cutting lines CL.

In the circumferential transfer step S26, the band continuum 80C is conveyed to the circumferential CID using the rotary drum device 130.

The rotary drum device 130 receives the band continuum 80C at the receiving point P1. When receiving the band continuum 80C, the rotary drum device 130 holds the band continuum 80C at least one of the plurality of holding portions 132 so that each of the pair of side joint region SBRs overlaps with at least one of the plurality of suction holes 135. Hold by (see FIGS. 9B and 9C).

As shown in FIG. 9C, the band continuum 80C has a plurality of sheet layers 81 formed by overlapping the band sheet continuum 81C in the thickness direction T. The third sheet layer 811 having the highest elastic force among the first sheet layer 811 arranged on one side of the thickness direction T and the third sheet layer 813 arranged on the outermost side on the other side of the thickness direction T. The rotary drum device 130 may receive the band continuum 80C so that the sheet layer 813 is in contact with the holding portion 132.

Further, the rotary drum device 130 may receive the band continuum 80C so that the band joining region BBR to which the adjacent sheet layers of the plurality of sheet layers 81 are joined overlap with at least one of the plurality of suction holes 135. As shown in FIG. 9C, the first band bonding region BBR1 may overlap the plurality of suction holes 135, and the second band bonding region BBR2 may overlap the plurality of suction holes 135.

The rotary drum device 130 receives the band continuum 80C so that the outer contact surface 133B abuts on the band continuum 80C.

The rotary drum device 130 conveys the band continuation body 80C in the circumferential direction CID while holding the band continuation body 80C. As shown in FIG. 8, the rotating drum device 130 conveys the band continuum 80C in the circumferential direction CID, so that the band continuum 80C straddles the two holding portions 132.

As shown in FIG. 9C, the band continuum 80C may be conveyed in the circumferential direction CID so that the band continuum 80C straddles the pair of corner portions 136.

In the cutting step S30, the band continuum 80C is cut by the cutting device 140. Specifically, as shown in FIG. 8, the cutting device 140 cuts the band continuum 80C straddling at least two holding portions 132. The waistband 80 is obtained by cutting the band continuum 80C.

The cutting device 140 may cut the band continuum 80C after the band continuum 80C straddles the three holding portions 132. The cutting device 140 may cut the band continuum 80C after the band continuum 80C is wound around the rotary drum device 130 at a predetermined angle α (for example, 90 degrees) or more. Here, the straight line connecting the rotary shaft 131A and the front end of the band continuum 80C is defined as the first straight line, and the straight line connecting the rotary shaft 131A and the rear end of the band continuous body 80C wound around the rotary drum device 130. Let be the second straight line. As shown in FIG. 8, the predetermined angle α can be defined by the angle formed by the first straight line and the second straight line.

The band elastic member continuum 82C may be cut by the cutting device 140 cutting the band continuum 80C along the crossing direction CD. As a result, the band elastic member 82 (band elastic member continuous body 82C) that is not joined to the band sheet continuous body 81C (sheet layer 81) may be contracted to provide the non-stretchable region NSTR. Specifically, in the region from the edge 80E (front end edge of the band continuum 80C) in the width direction W of the waistband 80 to the portion where the band elastic member 82 (band elastic member continuum 82C) is joined, the band elasticity. The elastic force of the member 82 (band elastic member continuum 82C) does not act on the sheet layer 81, and the non-expandable region NSTR can be provided.

In the second transfer step S40, the waistband 80 is transferred to the main body continuous body 11C. Specifically, the waistband 80 is conveyed to the main body continuum 11C while maintaining a state in which each of the pair of side joint regions SBR overlaps at least one of the plurality of suction holes 135.

The waistband 80 may be conveyed with the non-stretchable region NSTR overlapping at least one of the plurality of suction holes 135.

The rotary drum device 130 may rotate the holding portion 132 by 90 degrees around the rotation shaft 132A along the radial RD of the rotary drum device 130 to the delivery point P2 of the waistband 80 (see FIG. 11).

In the joining step S50, the waistband 80 is joined to the main body continuous body 11C via an adhesive at the delivery point P2 of the waistband 80 to the main body continuous body 11C. Specifically, the rotary drum device 130 joins the waistband 80 to the sheet continuous body (skin surface sheet 20) of the main body continuous body 11C via the first joint portion 831 (adhesive) at the delivery point P2.

The main body continuous body 11C includes a sheet continuous body in which the sheet materials constituting the skin surface sheet 20 are continuous. The main body continuous body 11C may be configured by the main body portion 11 being continuous in the front-rear direction L. The absorbent article 10 can be obtained by processing the main body continuum 11C to which the waistband 80 is joined by cutting or the like.

As described above, in the method for producing the absorbent article 10, since the side bonding region SBR has low air permeability due to the adhesive, the portion of the band continuum 80C that overlaps with the side bonding region SBR (the bonding overlapping portion in FIG. 2). 85) is more easily adsorbed than the portion of the band continuum 80C that does not overlap the bonding region BR (hereinafter, non-bonding overlapping portion). Therefore, by holding the band continuum 80C and the waistband 80 so that each of the pair of side bonding regions SBR overlaps with at least one of the plurality of suction holes 135, the pair of bonding overlapping portions 85 can be strongly adsorbed. As a result, the pair of joining overlapping portions becomes difficult to move, and the pair of joining overlapping portions 85 can be fixed. In order for the portion between the pair of joining overlapping portions 85 to shrink, the pair of joining overlapping portions 85 also need to shrink together. Therefore, by fixing the pair of joining overlapping portions 85, the pair of joining overlapping portions 85 is also contracted. It is also possible to suppress the contraction of the portion between 85. Therefore, although the band continuum 80C and the waistband 80 have elasticity, in the first transfer step S20 and the second transfer step S40, the contraction of the band continuum and the waistband is suppressed to aim at the waistband. It can be joined to the skin surface sheet 20 (main body continuum 11C) as it is.

In addition, since the band continuum 80C is conveyed in the circumferential CID until it straddles at least two holding portions 132, the portion extending in the circumferential CID of the band continuum 80C is the rotation center (rotation) of the rotary drum device 130. Receives a force in the direction of the shaft 131A). Therefore, when the band continuum 80C conveyed in the circumferential direction CID is pressed against the holding portion 132, a strong frictional force acts between the portion extending in the circumferential direction CID of the band continuum 80C and the holding portion 132, and the band The contraction of the continuum 80C is further suppressed. As a result, the band continuum 80C can be cut while the band continuum 80C is firmly fixed to the holding portion 132, and it is possible to prevent the holding position of the waistband 80 from being displaced due to the cutting.

Since the waistband 80 is conveyed to the main body continuum 11C while maintaining a state in which each of the pair of side joint regions SBR overlaps with at least one of the plurality of suction holes 135, the waistband 80 is firmly held and the waist is held. The band 80 can be joined to the skin sheet 20. As a result, the waistband 80 can be joined to the skin sheet 20 as intended.

Further, the closer to the holding portion 132, the stronger the adsorption, so that the third sheet layer 813 having the higher elastic force among the first sheet layer 811 and the third sheet layer 813 arranged on the outermost side in the thickness direction T. That is, the rotating drum device 130 receives the band continuum 80C so that the holding portion 132 comes into contact with the sheet layer that easily shrinks, so that the band continuous body 80C can be conveyed in a strongly adsorbed state. As a result, it is possible to prevent the band continuum 80C from contracting during transportation.

Further, since the band bonding region BBR has low air permeability, the portion overlapping the band bonding region BBR can be strongly adsorbed as compared with the portion not overlapping the band bonding region BBR. Therefore, by overlapping the suction hole 135 with the band bonding region BBR (first band bonding region BBR1 and second band bonding region BBR2), the band continuum 80C and the waist band 80 can be held more firmly.

Further, in the above-mentioned manufacturing method, the arrangement direction of the waistband 80 can be rotated by 90 degrees before the waistband 80 is delivered to the main body continuous body 11C. Therefore, due to the arrangement of the equipment, even if the arrangement direction of the manufactured waistband deviates by 90 degrees from the target arrangement, the transport direction MD1 of the band continuum 80C and the transport direction MD2 of the main body continuum 11C are crossed. It can be overlaid on TD. Therefore, the arrangement of equipment can be made compact.

Further, in the non-stretchable region NSTR, since the contraction caused by the band elastic member 82 (band elastic member continuum 82C) does not occur, wrinkles are unlikely to be formed at the end of the waistband 80. Therefore, in the above-mentioned manufacturing method, the waistband 80 is conveyed in a state where the non-stretchable region NSTR overlaps with at least one of the plurality of suction holes 135, so that the entire end portion (non-stretchable region NSTR) of the waistband 80 is covered. The waistband 80 can be maintained close to the suction hole, and the waistband 80 is easily strongly adsorbed. As a result, the waist band 80 can be suppressed from contracting, and the waist band 80 can be joined to the skin surface sheet 20 (main body continuous body 11C) as intended.

Further, on the outer contact surface 133B, the band continuum 80C and the waist band 80 are less likely to shrink due to friction than the central contact surface 133A. Therefore, the rotary drum device 130 can further fix the pair of joining overlapping portions 85 by receiving the band continuum 80C so that the outer contact surface 133B abuts on the band continuum 80C. As a result, the band continuous body 80C and the waist band 80 can be held more firmly, and the waist band can be joined to the skin surface sheet 20 (main body continuous body 11C) as intended.

Further, the band continuum 80C is strongly held by the suction holes 135 at the pair of outer contact surfaces 133B, and the band continuum 80C is held at the corners 136 by straddling each of the pair of corners 136. It is strongly pressed against the portion 132. As a result, a strong frictional force acts between the band continuum 80C and the corner portion 136 (holding portion 132), and the contraction of the band continuum 80C is further suppressed. As a result, the band continuum 80C is firmly fixed to the holding portion 132.

(5) Other Embodiments Although the present invention has been described in detail above using the above-described embodiments, those skilled in the art are not limited to the embodiments described in the present specification. Is clear. The present invention can be implemented as modifications and modifications without departing from the spirit and scope of the present invention, which is determined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplification and does not have any limiting meaning to the present invention.

In the above-described embodiment, the waistband 80 is arranged in the rear waist circumference region S2, but the present invention is not limited to this. The waistband 80 may be arranged in the front waist circumference area S1 or may be arranged in both the front waist circumference area S1 and the rear waist circumference area S2.

In the above-mentioned absorbent article 10, the waistband 80 is composed of a plurality of sheet layers 81, but may be composed of one sheet layer 81. In this case, the coating steps S21 and S23 and the folding steps S22 and S24 are not performed. The coating step S25 is performed to join the waistband 80 to the main body continuous body 11C.

In the above-mentioned manufacturing method, the waistbands 80 are bonded to each other by an adhesive, but the present invention is not limited to this. The waistband 80 may be joined by fusion such as a sonic seal or a heat seal. In this case, instead of the coating steps S21 and S23, a step of fusing the waistbands 80 to each other (sheet layers 81 to each other) may be performed after the folding steps S22 and S24.

In the above-mentioned manufacturing method, the band elastic member 82 (band elastic member continuum 82C) is not joined in the vicinity of the cutting line CL, so that the non-stretchable region NSTR is provided, but the present invention is not limited to this. The band elastic member 82 (band elastic member continuum 82C) may be joined from the edge 80E of the waist band 80. In this case, in order to reduce the contraction force in the region overlapping the suction hole 135, the band elastic member 82 (band elastic member continuum 82C) is predetermined in a predetermined region extending inward in the width direction W from the edge 80E of the waistband 80. It may be cut at intervals. The predetermined region is, for example, a region between the edge 80E of the waistband 80 and the inner edge of the side joint region SBR in the width direction W. As a result, the contraction force of the band elastic member 82 is reduced in the predetermined region overlapping the suction hole 135, so that the waist band 80 (band continuum 80C) is easily strongly adsorbed. Therefore, in the circumferential transfer step S26 and the second transfer step S40, the waist band 80 (band continuum 80C) can be firmly fixed to the holding portion 132. As a result, the waistband can be joined to the skin surface sheet 20 (main body continuous body 11C) as intended without wrinkles and curling on the waistband 80.

In the above-described embodiment, the absorbent article 10 is a tape-type disposable diaper, but is not limited thereto. The absorbent article 10 may be a pants-type disposable diaper.

The above-described embodiment and other configurations according to the method for producing the absorbent article 10 according to the embodiment can be appropriately combined.

10: Absorbent article 11: Main body 20: Skin surface sheet 21: Front surface sheet 22: Side sheet 23: Back surface sheet 24: Exterior sheet 25: Non-skin surface sheet 31: Absorbent core 45: Waist circumference Elastic member 65: Leg circumference Opening 66: Waist opening 80: Waist band 81: Sheet layer 82: Band elastic member 110: Joining device 120: Folding device 121: Device 122: Device 130: Rotating drum device 131: Rotating drum 132: Holding portion 135: Suction hole 136: Corner 140: Cutting device 811: First sheet layer 812: Second sheet layer 813: Third sheet layer AS: Accommodation space

Claims (7)

A method of manufacturing absorbent articles
The absorbent article is
The front-back direction, the width direction orthogonal to the front-back direction, and
Skin sheet and
A waistband arranged on the skin surface side of the skin surface sheet and having elasticity in the width direction,
It has a pair of side joining regions in which an adhesive for joining the waistband and the skin surface sheet is arranged on both outer sides of the waistband in the width direction from the center in the width direction.
The method for producing the absorbent article is
A step of transporting a band continuous body in which the band sheet material constituting the waist band includes a continuous band sheet continuous body and having elasticity.
A step of applying the adhesive to the band continuum to provide the pair of side bonding regions, and
The step of cutting the band continuum coated with the adhesive, and
A step of transporting the waistband obtained by cutting the band continuum to a main body continuum including a sheet continuum in which the sheet material constituting the skin surface sheet is continuous.
In the delivery of the waistband to the main body continuum, a step of joining the waistband to the main body continuous body via the adhesive is provided.
In the step of transporting the band continuum, each of the pair of side joint regions is formed with at least one of the plurality of suction holes by using a rotary drum device having a plurality of holding portions having a plurality of suction holes formed therein. It has a step of transporting the band continuum in the circumferential direction while the band continuum is held by at least one of the plurality of holding portions so as to overlap each other.
In the step of cutting the band continuum, the band continuum straddling at least two of the plurality of holding portions is cut by the transportation in the circumferential direction.
In the step of transporting the waistband, an absorbent article that transports the waistband to the main body continuum while maintaining a state in which each of the pair of side joint regions overlaps at least one of the plurality of suction holes. Manufacturing method. The band continuum has a plurality of sheet layers formed by overlapping the band sheet continuums in the thickness direction.
In the step of transporting the band continuum, the elastic force of the outermost sheet layer arranged on one side in the thickness direction and the outermost sheet layer arranged on the other side in the thickness direction. The method for producing an absorbent article according to claim 1, wherein the rotating drum device receives the band continuum so that the sheet layer having a high value abuts on the holding portion. The band continuum has a plurality of sheet layers formed by overlapping the band sheet continuums in the thickness direction.
In the step of transporting the band continuum, the rotating drum device performs the band so that the band joining region in which the adjacent sheet layers of the plurality of sheet layers are joined overlaps with at least one of the plurality of suction holes. The method for producing an absorbent article according to claim 1 or 2, which receives a continuum. In the step of transporting the waistband, any one of claims 1 to 3 in which the holding portion is rotated by 90 degrees around a rotation axis along the radial direction of the rotary drum device to a delivery point of the waistband. The method for producing an absorbent article according to item 1. The waistband has a region extending inward in the width direction from the edge in the width direction of the waistband, and has a non-stretchable region to which the elastic member having elasticity is not joined.
The absorbent article according to any one of claims 1 to 4, wherein in the step of transporting the waistband, the waistband is transported in a state where the non-stretchable region overlaps with at least one of the plurality of suction holes. Production method. The holding portion has a contact surface that abuts on the band continuum.
The contact surface is
A central contact surface arranged in the center in the transport direction of the band continuum,
It has an outer contact surface that is arranged so as to sandwich the central contact surface in the transport direction and has the plurality of suction holes formed therein.
The coefficient of friction of the outer contact surface is higher than the friction coefficient of the central contact surface.
The step according to any one of claims 1 to 5, wherein in the step of transporting the band continuum, the rotating drum device receives the band continuum so that the outer contact surface abuts on the band continuum. A method for manufacturing an absorbent article. The holding portion has a contact surface that abuts on the band continuum.
The contact surface is
A central contact surface arranged in the center in the transport direction of the band continuum,
It has a pair of outer contact surfaces arranged so as to sandwich the central contact surface in the transport direction and having the plurality of suction holes formed therein.
By inclining the pair of outer contact surfaces toward the rotation axis side of the rotating drum device with respect to the central contact surface, a pair of outer end contact surfaces and the central contact surface are formed. With corners
In any of claims 1 to 6, in the step of transporting the band continuum in the circumferential direction, the band continuum is transported in the circumferential direction so that the band continuum straddles each of the pair of corners. The method for producing an absorbent article according to item 1.

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