JP2004337314A - Absorbent article and its manufacturing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article which ensures attachability and adhesion and prevents a leakage in the back. <P>SOLUTION: A sanitary napkin 1 is equipped with a surface sheet 2 with liquid permeability, a back surface sheet 3 with liquid impermeability, an absorbent body 4 which has a liquid retaining property, is placed between the surface sheet 2 and the back surface sheet 3, and is partly incorporated with the surface sheet 2 by a leakage prevention groove 8. Leakage prevention walls 5 are provided to stretch on both sides of the surface sheet 2. The leakage prevention wall 5 comprises a base wall part 51 placed all over from the front part A to the rear part B of the surface sheet 2 and a strip-shaped stretching part 52 which covers the upper part of the base wall part 51 in a manner to be close to or to be separated from the surface sheet 2. A leakage prevention sheet 10 is provided in the rear part B of the surface sheet 2. The leakage prevention sheet 10 is joined to the strip-shaped stretching part 52 to form a pouched space between the leakage prevention sheet 10 and the surface sheet 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an absorbent article such as a sanitary napkin, a disposable diaper, a vaginal sheet, an incontinence pad, and a method for manufacturing the same, and in particular, to an absorbent article provided with a leak-proof wall for preventing side leakage, and leak-proof. The present invention relates to a technique for joining flexible materials such as those used for walls.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as this type of absorbent article, an absorbent article provided with a leak-proof wall having a T-shaped cross section has been known. For example, Patent Literature 1 discloses a front part of an absorbent article (liquid of a user). An absorptive article having a leakage-preventing wall that is in contact with the skin of the user at a portion (a portion facing the excretion part) is disclosed.
[0003]
[Patent Document 1]
JP-A-8-182702
[Problems to be solved by the invention]
Generally, in an absorbent article having a leak-proof wall as described above, when the absorbent article itself is deformed in accordance with the movement of the user, the wearability (fitting property) and the adhesion ( However, in the case of the related art disclosed in Patent Document 1, since the leak-proof wall is provided only at the front part of the absorbent article, the leakage prevention wall is provided at the rear part of the absorbent article. In addition, there is a problem that it is not possible to sufficiently secure the mounting property and the adhesion, and further, there is a possibility that a back leak may occur.
[0005]
By the way, in recent years, from the viewpoint of improving wearability and adhesion, and preventing leakage behind, a technique has been developed in which a leakage prevention wall is extended to a rear part of the absorbent article and a leakage prevention sheet is provided at a rear end part thereof. .
[0006]
When such an absorbent article is manufactured, for forming the leak-proof wall, an elastic member such as thread rubber is joined to a flexible material such as a non-woven fabric, and a gathering process is performed.
Then, when joining the leak-proof sheet to the leak-proof wall, using the same flexible material as the leak-proof wall as a raw material, cut while feeding this leak-proof sheet raw material at a predetermined speed, Form a plurality of leak-proof sheets. On the other hand, while the intermediate (to which the absorbent article is being manufactured) to which the leak-proof wall has been joined is being sent at a predetermined speed, the leak-proof sheet is joined to this intermediate while being sent at a given speed.
[0007]
Usually, from the viewpoint of reducing the trim generated from the leak-proof sheet material, the transport speed of the leak-proof sheet material is set to be lower than the transport speed of the intermediate, and the transport speed of the leak-proof sheet is reduced If the speed is adjusted, a speed difference occurs between the transport speed of the leak-proof sheet and the transport speed of the raw material of the leak-proof sheet in the area for receiving the leak-proof sheet.
As a result, the position at which the leak-proof sheet is joined to the intermediate body becomes unstable, or the flexibility of the leak-proof sheet may be combined, which may damage the leak-proof sheet. Cannot be manufactured stably.
[0008]
Therefore, an object of the present invention is to provide an absorbent article that can ensure the fit and the adherence, and can further prevent back leakage.
Another object of the present invention is to provide a manufacturing method capable of stably manufacturing such an absorbent article.
[0009]
[Means for Solving the Problems]
The present invention provides a liquid-permeable topsheet, a liquid-impermeable backsheet, and a liquid-retaining backsheet that is interposed between the topsheet and the backsheet and is partially separated from the topsheet by a leak-proof groove. The topsheet is provided with an absorbent body, and a leakage-preventing wall is provided on both sides of the topsheet so as to be extendable and contractible, and the leakage-prevention wall is distributed from a front portion to a rear portion of the topsheet. A base wall portion and a band-shaped expansion and contraction portion that covers the upper portion of the base wall portion in a state of approaching or separating from the topsheet, and a leakage prevention sheet is provided at a rear portion of the topsheet, The leakproof sheet achieves the above-mentioned object by providing an absorbent article characterized by forming a bag-shaped space between the topsheet and the strip-shaped stretchable portion by joining the leakproof sheet. is there.
[0010]
According to the present invention, the leak-proof wall is extended to the rear part of the topsheet, and the leak-proof sheet is joined to the belt-shaped elastic part at the rear part, so that the wearability and adhesion can be improved even at the rear part of the absorbent article. And a bag-like space can be formed between the leak-proof sheet and the topsheet to prevent back leakage.
[0011]
Also, the present invention provides a continuous sheet for leak-proof wall, in which the sheet for leak-proof wall is continuous by bending the sheet for raw sheet forming the top sheet, the sheet for leak-proof wall forming the leak-proof wall, and the back sheet. A method for producing an absorbent article according to any one of claims 1 to 4, wherein a back sheet material to be formed and a leak-proof sheet material to form the leak-proof sheet are used. While the first sheet is fed at the first speed, an intermediate body is formed by joining the leakage prevention wall continuum to the top sheet material and joining the back sheet material via the absorber. A body forming step, a leak-proof sheet forming step of cutting the raw sheet of the leak-proof sheet at a second speed while feeding the sheet at a second speed, and the intermediate step of feeding the leak-proof sheet at a predetermined transport speed. Leak-proof sheet joining work that joins and joins the body And in the leakproof sheet joining step, controlling the transport speed of the leakproof sheet after receiving the leakproof sheet so as to accelerate from the second speed to the first speed, Achieving the object by providing a method of manufacturing an absorbent article, wherein the method comprises controlling to reduce the speed from the first speed to the second speed after delivering the leakproof sheet. It is.
[0012]
According to the present invention, by controlling the conveying speed of the leak-proof sheet in accordance with the first speed of the intermediate and the second speed of the raw material of the leak-proof sheet, the leak-proof sheet can be controlled regardless of its flexibility. In addition, it can be transported without being damaged, and can be joined to an appropriate position of the leak-proof wall, so that an absorbent article can be stably manufactured.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of an absorbent article and a device for producing the absorbent article of the present invention will be described with reference to the drawings.
As shown in FIG. 1, FIG. 2 or FIG. 3C, the sanitary napkin (absorbent article) 1 of the present embodiment includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, And an absorbent body 4 having a liquid retaining property, interposed between the top sheet 2 and the back sheet 3 and partially integrated with the top sheet 2 by the leakage preventing groove 8.
On both sides of the topsheet 2, leak-proof walls 5 are provided so as to be able to expand and contract. The leak-proof wall 5 has a base wall portion 51 disposed from the front portion A to the rear portion B of the topsheet 2 and a band-shaped expansion / contraction portion that covers an upper portion of the base wall portion 51 in a state of approaching or separating from the topsheet 2. 52.
On the rear part B of the topsheet 2, a leak-proof sheet 10 is provided. The leak-proof sheet 10 is joined to the belt-shaped elastic part 52 to form a bag-shaped space between the sheet and the top sheet 2.
First, the sanitary napkin 1 will be described in detail.
[0014]
The topsheet 2 is formed in a vertically long substantially elliptical sheet shape, covers the upper side of the absorber 4, and its peripheral portion is caught between the absorber 4 and the backsheet 3.
The back sheet 3 is formed in a sheet shape slightly larger than the top sheet 2 and has a shape in which a pair of wings 7 are added, and covers the lower side of the absorber 4. Note that a sheet made of a nonwoven fabric having the same shape and size as this is attached to the front side (skin contact side) of the topsheet 3.
[0015]
A side flap 6 is formed on a portion of the back sheet 3 extending laterally from the top sheet 2, and a wing 7 is formed on a portion extending laterally from the side flap 6. ing.
[0016]
The wing portion 7 is bent and adhered to the outer surface of the underwear, thereby fixing the sanitary napkin 1 to the inner surface of the underwear. In this case, the front part A of the sanitary napkin 1 is opposed to the liquid excretion part of the user, and the rear part B is opposed to a part on the back side of the liquid excretion part of the user.
End seal portions 11 are formed on portions of the top sheet 2 and the back sheet 3 extending forward and backward from the absorber 4, respectively.
[0017]
The absorber 4 and the topsheet 2 are formed with a leakage-preventing groove 8 in which these are compacted and integrated. The leak preventing groove 8 has a function of suppressing the diffusion of the bodily fluid absorbed by the absorber 4, and is formed in a substantially elliptical shape from the front part to the rear part at the center in the width direction.
[0018]
On both sides of the topsheet 2, a pair of leak-proof walls 5, 5 are joined from the front part A to the rear part B. The leak-proof wall 5 is formed by subjecting a single nonwoven fabric to a gathering process so as to have a T-shaped cross section, and is integrally formed of a base wall portion 51 and a band-shaped elastic portion 52.
[0019]
The base wall portion 51 has a lower edge portion wrapped between the top sheet 2 and the back sheet 3, and covers the upper side area of the top sheet 2 in a state of standing up from the edge portion of the top sheet 2. ing.
[0020]
The band-shaped elastic portion 52 is formed in a shape that once extends outward in the width direction from the upper end of the base wall portion 51 and then is folded inward in the width direction, and approaches or separates from the upper surface of the side portion of the topsheet 2. In this state, the upper part of the base wall 51 is covered.
[0021]
An elastic member 9 such as thread rubber or urethane rubber is present in the belt-shaped elastic portion 52 in the longitudinal direction. The elastic member 9 causes the sanitary napkin 1 itself to be slightly bent inward from the center in the longitudinal direction under no load, and in this case, the band-shaped elastic portion 52 is stretched. In this state, the base wall portion 52 is separated from the top surface of the side portion of the topsheet 2, and the base wall portion 52 stands upright from the edge portion of the topsheet 2.
The leak-proof wall 5 is held in a state where the base wall portion 51 is folded and the band-shaped elastic portion 52 is in surface contact with the skin of the user while expanding and contracting in response to the movement of the user in use. .
[0022]
On the rear part B of the topsheet 2, a leak-proof sheet 10 is provided. The leak-proof sheet 10 is formed in a substantially semicircular sheet shape so as to cover the rear end portion of the topsheet 2, and both end portions are joined to the band-shaped elastic portion 52. As a result, the leak-proof sheet 10 forms a pocket space (sack-like space) between the leak-proof sheet 10 and the rear end portion of the topsheet 2 to prevent back leak.
[0023]
The widthwise edge 10 ′ of the leak-proof sheet 10 between the belt-shaped elastic portions 52 is formed in an arc shape from the viewpoint of improving the mounting property (fitting property). Width W _P of the barrier sheet 10 is not protruded outside the barrier sheet 10 from the leakage preventing wall 5, from the viewpoint of not impairing the wearability, the interval in the width direction of the outer edge of the pair of belt-shaped elastic portion 52 W is set to be smaller than _G. For example, with respect to spacing _{W G} of the strip-shaped elastic portion 52 that is 50 to 120 mm, a width _{W P} of the barrier sheet 10 is 45～115Mm.
[0024]
Per longitudinal direction of the sanitary napkin 1, Vertical ratio of the total length L of the longitudinal L _P of the leak-barrier sheet 10, a viewpoint of ensuring the mounting and adhesiveness of the sanitary napkin 1, conveying rollers for conveying the barrier sheet 10 From the balance with the viewpoint of reasonably controlling the rotation speed of No. 21 (details will be described later), the rotation speed may be within the range of 0.05 to 0.5, more preferably 0.1 to 0.35. , More preferably 0.1 to 0.2.
When the longitudinal ratio of the leak-proof sheet 10 is smaller than 0.05, the rotational speed ratio increases, and the mechanical load increases. In this case, there is a possibility that the absorbent surface of the sanitary napkin 1 is reduced and the absorbability is reduced.
[0025]
Next, an example of a method for manufacturing the above-described sanitary napkin 1 will be described, but the sanitary napkin 1 of the present embodiment is not limited to the following manufacturing method.
As shown in FIGS. 3 (a) to 3 (c), a surface sheet material 2a in which a material having liquid permeability is wound in a roll shape in advance, and a flexible material such as a nonwoven fabric is wound in a roll shape. Leakproof wall raw material 5a, absorbent raw material (not shown) made to have a liquid retaining property using pulp fiber and absorbent polymer, back sheet raw material in which an impermeable material is wound in a roll shape An anti-leakage sheet 10a in which a flexible material such as a nonwoven fabric is wound in a roll shape is prepared.
[0026]
The manufacturing method of the present embodiment includes an intermediate forming step, a leak-proof sheet forming step, and a leak-proof sheet joining step.
The intermediate formation step, first, while sending the topsheet raw 2a at a first speed V _1, after sticking a resilient member 9 by hot melt adhesive leakage preventing KabeHara anti 5a, bent T-shaped cross-section By performing the gathering process, the leak-preventing wall 5 forms a continuous leak-preventing wall 5b continuous in the feed direction, the continuous leak-preventing wall 5b is joined to the surface sheet web 2a, and they are hot-melt bonded. The first intermediate body 30A is integrally formed by bonding with an agent (see FIG. 3A).
[0027]
Next, the plurality of absorbers 4 cut from the absorber raw material are sent at predetermined intervals onto the surface sheet raw material 2a of the first intermediate body 30A, and the surface sheet raw material 2a and the leak-proof wall continuum 5b Is folded back, the back sheet 3a is affixed to the folded portion and the absorber 4 with a hot melt adhesive, and then subjected to a first heat sealing process (for example, a leak-proof groove process, etc.). (See FIG. 3B). The first, second intermediate 30A, 30B is sent at the same first speed _{V 1} and the surface sheet raw 2a.
[0028]
As shown in FIGS. 4 and 5, a cutter roller 22, an anvil roller 23, a transport roller 21 and the like are used in the leakproof sheet forming step.
The cutter roller 22 is a roller having a cutter blade 22a on the outer peripheral surface. The cutter roller 22 is paired with an anvil roller 23 having the same diameter (for example, 40 mm) as the cutter roller 22 to make the leak-prevention sheet raw material 31 have a second speed V ₂ (<V It is configured so that a plurality of leak-proof sheets 10 are formed by cutting periodically while being pulled out in ₁ ).
[0029]
The transport roller 21 is a roller having a plurality of vacuum holes (not shown) on the outer peripheral surface. The transport roller 21 forms a pair with the anvil roller 23 rotating at the second speed V ₂ (tangential speed) at a diameter ratio of about 10 times. The leak-proof sheet 10 received from the anvil roller 23 is conveyed while being sucked, and forms a pair with the feed roller 24 rotating at the first speed V ₁ (tangential speed). Is configured to transfer the leak-proof sheet 10 to the intermediate body 30B.
[0030]
In the case of the present embodiment, a servo motor (not shown) is connected to the transport roller 21 so as to transmit power. The servo motor, the conveying speed (tangential velocity) V _P of the conveying roller 21 as it accelerates or decelerates, and is configured to be servo-controlled on the basis of the driving command from the feedback control circuit. Specifically, the “drive command” is a difference between a target value set for a rotation position and a rotation speed corresponding to the first speed V ₁ and the second speed V ₂ , and a feedback control amount, for the servo motor. Directive.
[0031]
As shown in FIG. 6, within receiving area _P 1 _{P 2} of the barrier sheet 10, to control the conveyance velocity _{V P} of the conveyance roller 21, so as to be identical to the second speed _{V 2.} Here, the receiving area P ₁ P ₂ is an area on the outer peripheral surface of the transport roller 21 where the leak-proof sheet 10 has passed on the tangent line between the transport roller 21 and the anvil roller 23 from the front end to the rear end. In the receiving area P ₁ P ₂ , there is no speed difference between the transport roller 21 and the anvil roller 23, and as a result, the leakage prevention sheet 10 does not receive the shearing force from the transport roller 21 and the anvil roller 23. Transported without damage.
[0032]
Further, the acceleration from the receiving area _P 1 _{P 2} until Within acceleration region _P 2 _{P 3} toward the transfer area _P 3 _{P 4,} the conveying speed _{V P} of the conveying roller, reaches from the second speed _{V 2} to the first speed _{V 1} To control. Extent this case, the conveying speed V _P is it is preferable to match the first speed V _1, the conveying speed V _P is the relative speed with respect to the first speed V ₁ is, described above, meets the vertical ratio of the barrier sheet 10 The speed should be such that it becomes as small as.
[0033]
Further, in the transfer area _P 3 _{P 4} of the barrier sheet 10, to control the conveyance velocity _{V P} of the conveyance roller 21, so as to be identical to the first speed _{V 1.} Here, the delivery area P ₃ P ₄ is an area on the outer peripheral surface of the transport roller 21 where the leak-proof sheet 10 has passed on the tangent line between the transport roller 21 and the feed roller 24 from the front end to the rear end. In the delivery area P ₃ P ₄ , there is no speed difference between the transport roller 21 and the feed roller 24, and as a result, the leak-proof sheet 10 is made of the leak-proof wall material 5 a of the second intermediate body 30 </ b> B. Is bonded (temporarily fixed) with a hot melt adhesive at an appropriate position.
[0034]
Furthermore, in the receiving area _P 1 within the deceleration region _P 4 _{P 1} toward the _{P 2} from the delivery region _P 3 _{P 4,} the conveying speed _{V P} of the conveyance roller 21, extends from the first speed _{V 1} to the second speed _{V 2} The speed is controlled so as to reduce the speed to that of the receiving area P ₁ P ₂ . In this case, this case, it is preferable that the conveying speed V _P is equal to the second speed V _2, the conveying speed V _P, the relative speed to the second speed V ₂ is described above, Vertical ratio of the barrier sheet 10 The speed should be such that the speed becomes small enough to satisfy the condition.
In the subsequent steps, the second heat sealing process is applied to the joint between the leak-proof sheet and the topsheet, and after cutting the entire circumference, the package is exteriorized to complete the sanitary napkin 1.
[0035]
As described above, according to the present embodiment, the leakage prevention wall 5 is extended to the rear part B of the topsheet 2 and the leakage prevention sheet 10 is joined to the band-shaped elastic part 52 of the rear part B. Since the step formed between the leak-proof walls 5, 5 is closed by the leak-proof sheet 10, even at the rear portion B of the sanitary napkin 1, it is possible to secure the fitting property and the adhesion, and the leak-proof sheet 10. Since a pocket space is formed between the top sheet 2 and the front sheet 2, it is possible to prevent back leakage.
[0036]
In particular, since the leak-proof sheet 10 is joined so as to overlap with a part of the leak-proof groove 8, the body fluid absorbed by the absorber 4 in the pocket space is suppressed by the leak-proof groove 8, so Leakage can be more effectively prevented.
Also, an edge 10 'and an arcuate barrier sheet 10, a width W _P of the barrier sheet 10, because of the smaller than the interval W _G of the strip-shaped elastic portion 52, it is possible to further improve the wearability.
[0037]
Further, according to this embodiment, the conveying speed _{V P} of the barrier sheet 10, corresponding to intermediate 30 (30A, 30B) first velocity _{V 1,} and the second speed _{V 2} of the barrier sheet raw 10a of Since the leakage prevention sheet 10 can be conveyed without being damaged regardless of its flexibility and can be joined to an appropriate position of the leakage prevention wall 5, the sanitary napkin 1 can be stably held. Can be manufactured.
[0038]
In particular, since setting the vertical ratio of the total length L of the longitudinal L _P of the barrier sheet 10 within a predetermined range, the mounting and adhesiveness of the sanitary napkin 1, the control of the conveying speed V _P of the barrier sheet A harmony point with simplicity can be found.
[0039]
The present invention is not limited to the above embodiment, and various changes can be made.
For example, the absorbent article and the method of manufacturing the same according to the present invention are applicable not only to the sanitary napkin 1 but also to disposable diapers, vagina sheets, incontinence pads and the like.
Further, the edge 10 ′ of the leak-proof sheet 10 is preferably formed in an arc shape from the viewpoint of improving the mounting property, but may be linear in view of simplifying the configuration of the cutter roller 22.
Furthermore, it is preferable that the leak-proof sheet 10 overlaps a part of the leak-proof groove 8 from the viewpoint of effective prevention of back leakage, but from the same viewpoint, the edge 10 ′ of the leak-proof sheet 10 is It suffices that it overlaps with the end of the leak-proof groove 8. On the other hand, from the viewpoint of cost reduction of the leak-proof sheet 10, the longitudinal length of the leak-proof sheet 10 is reduced, and 8 may not be overlapped.
Further, in the leak-proof sheet forming step and the leak-proof sheet joining step, the anvil roller 23 is interposed between the transport roller 21 and the cutter roller 22, but the transport roller 21 and the cutter roller 22 are not used without using the anvil roller 23. It is also possible to use only 22.
In addition, in the leakproof sheet joining step, the leakproof sheet 10 is not limited to the case where the leakproof sheet 10 is joined to and joined to the intermediate body, and may be joined to and joined to the continuous leakproof wall body in the intermediate body forming step.
[0040]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, an absorptive article which can ensure mounting | wearing property and adhesiveness and can prevent a back leak further can be obtained.
Further, according to the present invention, it is possible to obtain a manufacturing method capable of stably manufacturing such an absorbent article.
[Brief description of the drawings]
FIG. 1 is a plan view showing a schematic configuration of a sanitary napkin of the present embodiment.
FIG. 2 is a perspective view showing a schematic configuration of a sanitary napkin of the present embodiment.
FIGS. 3A and 3B show steps of manufacturing a sanitary napkin in each step of the manufacturing method of the present embodiment, wherein FIG. 3A is a cross-sectional view of a first intermediate, and FIG. Sectional drawing, (c) is a sectional view of a sanitary napkin.
FIG. 4 is a diagram showing a schematic configuration of an apparatus used in a leak-proof sheet forming step and a leak-proof sheet joining step of the manufacturing method of the present embodiment.
FIG. 5 is a perspective view illustrating a schematic configuration of a transport roller, a cutter roller, and an anvil roller of FIG. 4;
FIG. 6 is a graph showing the relationship between the speed and time of a transport roller.
[Explanation of symbols]
2 Top sheet 2a Top sheet 3 Back sheet 3a Back sheet 4 Absorber 5 Leak-preventing wall 51 Base wall 52 Strip-shaped expansion / contraction part 5a Leak-proof wall raw 5b Leak-proof wall continuum 8 Leak-proof groove 10 Leak-proof Sheet 21 Transport roller 30 Intermediate body 30A First intermediate body 30B Second intermediate body A Front part B Rear part V ₁ First speed V ₂ Second speed _VP Transport speed

Claims (6)

A liquid-permeable topsheet, a liquid-impermeable backsheet, and a liquid-retaining backsheet interposed between the topsheet and the backsheet and partially integrated with the topsheet by leak-proof grooves Equipped with an absorbent
On both sides of the topsheet, leakproof walls are provided so as to be extendable and contractible, and the leakproof walls are provided with a base wall portion arranged from a front portion to a rear portion of the topsheet, and the topsheet. Consisting of a band-shaped elastic portion that covers the upper portion of the base wall portion in a state approaching or away from the base wall portion,
A leak-proof sheet is provided at a rear portion of the topsheet, and the leak-proof sheet is joined to the band-shaped elastic portion to form a bag-like space between the topsheet and the topsheet. Absorbent article. 2. The absorbent article according to claim 1, wherein an edge of the leak-proof sheet between the band-shaped elastic portions is formed in an arc shape. 3. 3. The absorbent article according to claim 1, wherein the longitudinal ratio of the longitudinal direction of the leakproof sheet to the total longitudinal length is set to 0.1 to 0.35. 4. The top sheet forming the top sheet, the closing wall forming the leak preventing wall by bending the leak preventing wall, and the back sheet forming the back sheet forming the continuous leak preventing wall. And a method for producing the absorbent article according to any one of claims 1 to 3, using a leakproof sheet raw material forming the leakproof sheet,
While feeding the surface sheet material at a first speed, the leakproof wall continuum is joined to the surface sheet material, and the back sheet material is joined with the absorber interposed. An intermediate forming step of forming a body,
A leak-proof sheet forming step of cutting the leak-proof sheet material while feeding it at a second speed, and forming a plurality of the leak-proof sheets;
A leak-proof sheet joining step of joining and joining the intermediate or the leak-proof wall continuity while feeding the leak-proof sheet at a predetermined transport speed,
In the leak-proof sheet joining step, the transport speed of the leak-proof sheet is controlled so as to accelerate from the second speed to reach the vicinity of the first speed after receiving the leak-proof sheet. A method for manufacturing an absorbent article, comprising controlling to reduce the speed from the first speed to the vicinity of the second speed after delivering the leaked sheet. In the leak-proof sheet joining step, the conveying speed of the leak-proof sheet is controlled to be maintained at the first speed in the delivery area of the leak-proof sheet, and the second speed is controlled in the receiving area of the leak-proof sheet. The method for producing an absorbent article according to claim 4, wherein the control is performed so as to maintain the speed. In the leakproof sheet joining step, using a transport roller that transports the leakproof sheet,
The tangential speed of the transport roller is maintained at the second speed in the receiving area, and is accelerated from the second speed to the first speed in an area from the receiving area to the delivery area. The rotation speed of the transport roller is controlled such that the rotation speed is maintained at the first speed in the region and reduced from the first speed to the second speed in the region from the delivery region toward the reception region. The method for producing an absorbent article according to claim 4 or 5, wherein:

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