TW201325568A - Absorbent article production method - Google Patents

Abstract

The absorbent article production method comprises: a step of cutting a wing member starting material sheet thereby forming a continuous series of wing members that are partially connected to the trims; a step of forming respective adhesive areas on the protruding portions of the continuous wing member series, and covering the adhesive areas located on each side of the continuous wing member series with respective continuous series of separators; a step of removing the trims from the continuous wing member series; a step of forming the wing members that have the adhesive areas and the separators; and a step of joining the wing members to a continuous series of backing sheets.

Description

Method for manufacturing absorbent articles

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

Patent Document 1 discloses a well-known method for producing an absorbent article. The absorbent article comprises a body comprising a surface sheet, an inner sheet, an absorbent core positioned between the surface sheets and the inner sheet; and a wing member formed of a member different from the body and joined to the body, the wing member having a protruding portion protruding from both side edges of the body, the manufacturing method comprising the steps of gradually cutting the wing member raw material sheet along the cutting line, thereby forming a continuous body of the wing member; and traversing the wing member continuously The step of cutting the direction to form the wing member; and the step of joining the wing member to the surface sheet continuous body or the inner sheet continuous body at intervals in the conveying direction (see Patent Document 1). In this manufacturing method, a wing member is formed by supplying a continuous member of a wing member between a cutting roller and an anvil roll. In this case, by making the peripheral speed of the cutting roller and the supporting roller larger than the conveying speed of the wing member continuous body, the cutting roller and the supporting roller and the wing member continuous body are slid. As a result, the wing members are conveyed at intervals in the transport direction.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2007-105401

The wing member continuum includes a protruding portion of the wing member, and the protruding portions are also conveyed between the cutting roller and the support roller. However, the protruding portion is more free to move. Therefore, between the cutting roller and the supporting roller, there is a possibility that the wing member continuous body or the wing member is bent or wrinkled, and thus the productivity of the absorbent article is lowered.

According to the present invention, there is provided a method of producing an absorbent article comprising: a body comprising a surface sheet, an inner sheet, an absorbent core disposed between the surface sheets and the inner sheet; and a wing member The wing member has a protruding portion protruding from both side edges of the body, and the protruding portion is respectively provided with a bonding portion for fixing the absorbent article to the clothing and covering the protruding portion. a separating paper of a bonded portion, characterized in that the manufacturing method comprises the steps of: cutting a wing member raw material sheet along a cutting line, thereby forming a wing member continuous body partially connected to the trimming portion; The protruding portions of the continuum respectively form an adhesive portion, and the steps of respectively covering the adhesive portion on one side of the continuous member of the wing member and the adhesive portion on the other side of the continuous member of the wing member by the other separation paper continuum respectively a step of removing the trimming portion of the wing member raw material sheet from the wing member continuum; and continuously forming the wing member continuous body and the separation paper a step of separating in a transverse direction to form a wing member having a bonding portion and a separation paper; and joining the wing members to the surface sheet continuous body or the inner sheet continuous body at intervals in the conveying direction step.

When the absorbent article is manufactured, it is possible to suppress the occurrence of buckling or wrinkles in the wing member continuous body or the wing member.

As shown in FIG. 1A and FIG. 1B, the absorbent article 1 includes a main body 2, and a wing member 3 composed of a member different from the main body 2 and joined to the main body 2. The absorbent article 1 is composed of a sanitary napkin, an incontinence pad, a pad, and the like.

The main body 2 includes a liquid permeable surface sheet 2T, a liquid impermeable back sheet 2B, and a liquid retaining absorbent core 2A disposed between the surface sheet 2T and the back sheet 2B. The surface sheet 2T is composed of, for example, a non-woven fabric, and the inner sheet 2B is composed of, for example, a non-woven fabric or a plastic film. The absorbent core material 2A is composed of an aggregate of pulp or synthetic fibers and a highly absorbent polymer.

The wing member 3 includes a base portion 3B joined to the body 2, and first and second projecting portions 31 and 32 projecting from both side edges 2L and 2L of the body 2, respectively. Grooves 3D and 3D are formed at both side portions of the protruding portions 31 and 32, and thus the enlarged front end portions 3E are formed in the protruding portions 31 and 32. The protruding portions 31, 32 are respectively provided with first and second bonding portions 41, 42 for fixing the absorbent article 1 to clothes such as underwear, and for covering the bonding portions 41, 42 The first and second separation papers or the release papers 51 and 52. The adhesive portions 41, 42 are composed, for example, of a hot melt adhesive.

The wing member 3 is made of a film (polyethylene, polypropylene, etc.), a non-woven fabric (a spunbonded nonwoven fabric comprising a polyolefin, a polyethylene terephthalate or the like, a spunbond/meltblown/spunbond nonwoven fabric, a hot air non-woven fabric). , dot-bonded non-woven fabric, water-needle non-woven fabric, etc.), composite of film and non-woven fabric. From the viewpoint of the touch of the skin, the skin contact surface side of the wing member 3 is preferably made of a non-woven fabric, that is, it is preferably constituted by the above-mentioned nonwoven fabric or a composite material of a film and a nonwoven fabric.

The separation sheets 51 and 52 are formed of a substrate which is surface-treated by peeling from the bonding portions 41 and 42 disposed on the wing member 3. The substrate is composed of, for example, a film (polyethylene, polypropylene, polyethylene terephthalate, etc.) or paper. The surface treatment can be carried out by applying a general thermosetting type or an ultraviolet curing type to a base material and then hardening it.

In the embodiment of the present invention, the wing member 3 is disposed between the absorbent core 2A and the inner sheet 2B. Further, in the drawing, A1 is an adhesive between the inner sheet 2B and the wing member 3, the absorbent core 2A and the surface sheet 2T, and A2 is between the display wing member 3 and the absorbent core 2A and the surface sheet 2T. Adhesive.

2A and 2B show a state in which the wing member 3 is folded. That is, the protruding portions 31, 32 of the wing member 3 are folded to be positioned on the surface sheet 2T. Further, the separation sheets 51, 52 are mutually joined to each other by the adhesive 6.

The absorbent article 1 is in such a folded state and is bundled into a package. When in use, the wearer first separates the separation sheets 51, 52 from each other, and removes the separation sheets 51, 52 from the protruding portions 31, 32. Second, via the bonding part 41, 42, the absorbent article 1 is fixed to the laundry.

Fig. 3 is a view schematically showing a method of manufacturing the absorbent article 1. As shown in FIG. 3, the wing member raw material sheet SR3 is wound back from the roller 3R to the cutting device C1. In the example of the drawing, the cutting device C1 is composed of cutting rollers and supporting rollers that rotate in opposite directions, and the wing member raw material sheet SR3 is supplied between the cutting rollers and the supporting rollers.

In the cutting device C1, the wing member raw material sheet 3S is cut along a predetermined cutting line. As a result, as shown in FIG. 4, the wing member continuous body 3C partially connected to the dressing portion T is formed. Here, the wing member continuous body 3C is composed of a plurality of wing members 3 that are continuous with each other. In the illustrated example, the wing members 3 are formed continuously with each other in the base portion 3B, and the protruding portions 31, 32 are outwardly protruded on both sides of the wing member continuous body 3C. Next, the wing member continuous body 3C is sent to the overlapping device 71 via the driven roller R1 together with the trimming portion T. Further, in the drawing, MD displays the conveyance direction, and CL displays the cut line.

At this time, the protruding portions 31, 32 are connected to the trimming portion T, and the free movement is suppressed. Therefore, formation of wrinkles or the like in the wing member continuous body 3C can be suppressed.

Further, the separation paper stock sheet 5S is wound up from the roller 5R and sent to the cutting device C2. In the example of the drawing, the cutting device C2 is composed of a cutting roller and a supporting roller that rotate in opposite directions, and the separation paper stock sheet 5S is supplied between the cutting rollers and the supporting rollers.

In the cutting device C2, the separation paper stock sheet 5S is cut along a cutting line parallel to the conveyance direction MD. As a result, as shown in FIG. 5, the formation points are The first and second separation paper continuous bodies 51C and 52C extending in the direction MD are not transported. Then, the first and second separated paper continuous bodies 51C and 52C are sent to the superimposing device 71 via the driven roller R2. In the driven roller R2, the first and second separated paper continuous bodies 51C and 52C are transported while being separated in the transverse direction orthogonal to the transport direction MD.

Between the driven roller R2 and the superimposing device 71, the first and second separated paper continuous bodies 51C and 52C are intermittently applied with an adhesive by the adhesive applicator 70. As a result, the first and second separated paper continuous bodies 51C and 52C are formed with the adhesive portions 41 and 42 which are separated from each other in the transport direction MD.

The wing member continuous body 3C and the first and second separation paper continuous bodies 51C and 52C are superposed on each other in the overlapping device 71. In the example of the drawing, the superimposing device 71 is constituted by a pair of rollers that rotate in opposite directions, and the wing member continuous body 3C and the first and second separated paper continuous bodies 51C and 52C are supplied between the rollers. As a result, the adhesive portions 41 and 42 on the first and second separated paper continuous bodies 51C and 52C overlap the protruding portions 31 and 32 of the wing member continuous body 3C.

In the overlapping device 71, the trimming portion T is removed from the wing member continuous body 3C. Specifically, the wing member continuous body 3C and the trimming portion T are conveyed in mutually different directions.

As a result, as shown in FIGS. 6A and 6B, the protruding portions 41, 42 are formed in the protruding portions 31, 32, respectively. Further, the first bonding portion 41 is covered by the first separation paper continuous body 51C, and the second bonding portion 42 on the second protruding portion 32 is covered by the second separation paper continuous body 52C.

At this time, the first protruding portion 31 located on one side of the wing member continuous body 3C is coupled to each other by the first separation paper continuous body 51C, and the second protruding portion 32 located on the other side of the wing member continuous body 3C is 2 The separation paper continuous bodies 52C are coupled to each other. Therefore, the first and second protruding portions 31 and 32 are prevented from moving freely. Therefore, formation of wrinkles or the like in the wing member continuous body 3C can be suppressed.

The wing member continuous body 3C is then sent to the cutting device C3 via the driven roller R3. In the illustrated example, the cutting device C3 is composed of a cutting roller and a supporting roller that rotate in opposite directions, and the wing member continuous body 3C is supplied between the cutting roller 72C and the supporting roller 72A.

Further, the inner sheet continuous body 2BC is wound back from the inner sheet roller 2BR, and sent to the support roller 72A of the cutting device C3 via the driven roller R4. Here, the inner sheet continuous body 2BC is composed of a plurality of inner sheets 2B which are continuous with each other. Between the driven roller R4 and the supporting roller 72A, the adhesive agent is intermittently applied to the inner sheet continuous body 2BC by the adhesive applicator AA1. As a result, in the inner sheet continuous body 2BC, an adhesive portion which is separated from each other in the transport direction MD is formed.

In the cutting device C3, the wing member continuous body 3C is cut in the transverse direction at a predetermined interval together with the first and second separated paper continuous bodies 51C and 52C. As a result, the wing members 3 having the adhesive portions 41, 42 and the separation sheets 51, 52, respectively, are formed. In other words, the wing member 3 is separated from the wing member continuum 3C. Next, the wing member 3 is further conveyed while being held by the support roller 72A under a negative pressure, for example. In this case, the peripheral speed of the cutting roller 72C and the supporting roller 72A is continuous with the wing member. The conveyance speed of the body 3 is large, and as a result, slippage occurs between the cutting roller 72C and the support roller 72A and the wing member continuous body 3. As a result, the wing members 3 are conveyed at intervals in the transport direction MD. The wing member 3 conveyed by the support roller 72A is secondarily overlapped with the inner sheet continuous body 2BC, and is liberated from the support roller 72A. Therefore, as shown in FIGS. 7A and 7B, the wing member 3 is joined to the inner sheet continuous body 2BC by an adhesive from the adhesive applicator AA1.

Before the wing member continuum 3C is cut into the wing member 3, as described above, the first projecting portion 31 located on one side of the wing member continuum 3C is connected to each other by the first separating sheet continuous body 51C, and is located in the wing member continuously. The second protruding portion 32 on the other side of the body 3C is coupled to each other by the second separation paper continuous body 52C. Moreover, after the wing member continuous body 3C is cut into the wing member 3, the 1st separation paper 41 is provided in the 1st protrusion part 31, and the 2nd separation paper 42 is provided in the 2nd protrusion part 32. Therefore, in either case, the free movement of the first and second protruding portions 31, 32 is suppressed. Therefore, generation of wrinkles or the like in the wing member continuous body 3C can be suppressed.

The inner sheet continuous body 2BC and the wing member 3 are next sent to the suction roller R5 and the suction device 74. The suction roller R5 and the suction device 74 are conveyed while holding the inner sheet continuous body 2BC and the wing member 3, for example, under a negative pressure. Next, the inner sheet continuous body 2BC and the wing member 3 are sent to the overlapping device 75.

The adhesive 6 is intermittently applied to the first separation paper 51 by the adhesive applicator 73 between the support roller 72A and the overlapping device 75. Further, for the predetermined position of the inner sheet continuous body 2BC and the wing member 3, by means of an adhesive Applicator AA2, suitable for adhesives.

Further, the surface sheet continuous body 2TC in which the absorbent core members 2A are separated from each other in the transport direction MD is sent to the overlapping device 75. Here, the surface sheet continuous body 2TC is composed of a plurality of surface sheets 2T which are continuous with each other.

In the overlapping device 75, as shown in Figs. 8A and 8B, the inner sheet continuous body 2BC and the wing member 3 are overlapped and joined to the surface sheet continuous body 2TC. As a result, the absorbent article continuous body 1C composed of a plurality of absorbent articles 1 that are continuous with each other is formed. In the illustrated example, the wing member 3 is overlapped with the absorbent core 2A.

Next, the absorbent article continuous body 1C is sent to the folding device 76. At the folding device 76, the protruding portions 31, 32 of the wing member 3 are folded over the surface sheet continuous body 2TC. Further, the first and second separation papers 51 and 52 are joined to each other by the adhesive 6.

Next, the absorbent article continuous body 1C is sent to the cutting device C3. In the cutting device C3, the absorbent article continuous body 1C is cut at a predetermined interval in the transverse direction. As a result, the absorbent article 1 is formed.

In the embodiment described so far, in the support roller 72A, the wing member 3 is joined to the inner sheet continuous body 2BC. In other embodiments, at the support roller 72A, the wing member 3 is joined to the surface sheet continuum 2TC.

Further, in the embodiment described so far, the first and second separated paper continuous bodies 51C and 52C are positioned on the side of the cutting roller 71, and the wing member continuous body 3C is positioned on the side of the support roller 72A, and the first and second are conveyed. The paper continuous bodies 51C, 52C and the wing member continuous body 3C are separated. Thereby, the protruding portions 31, 32 It can be directly held by the support roller 72A without passing through the separation paper continuous bodies 51C, 52C or the separation papers 51, 52. Therefore, the wing member continuous body 3C or the wing member 3 is conveyed in a state where the protruding portions 31, 32 are stably held. Further, there is no possibility that the separation paper continuous bodies 51C, 52C or the separation papers 51, 52 are detached from the protruding portions 31, 32 or the deflection of the protruding portions 31, 32.

In the other embodiment, the separation paper continuous bodies 51C and 52C and the wing member continuous body 3C are conveyed so that the separation paper continuous bodies 51C and 52C are positioned on the support roller 72A side and the wing member continuous body 3C is located on the cutting roller 71 side. Between the two protruding portions 31 and 31 adjacent to each other in the transport direction MD and between the protruding portions 32 and 32, there is a step corresponding to the thickness of the wing member continuous body 3C. When the separation paper continuous bodies 51C and 52C are located on the side of the support roller 72A, the step difference is not engaged with the support roller 72A. Therefore, the wing member continuous body 3C can be conveyed while being stably held.

Further, in the embodiment described so far, the first and second bonding portions 41 and 42 are formed on the first and second separation sheets 51 and 52, and then transferred to the first and second protruding portions 31 and 32. . In other embodiments, the adhesive portions 41, 42 are formed directly on the protruding portions 31, 32.

Further, in the embodiment described so far, the grooves 3D, 3D are formed in the protruding portions 31, 32. In other embodiments, as shown in FIG. 9, grooves are not formed in the protruding portions 31, 32. In this case, the protruding portions 31, 32 respectively form a trapezoid.

This application is for the benefit of Japan’s Chartered Wish No. 2011-170157. Benefit, hereby use its entire disclosure.

1‧‧‧Absorbables

2‧‧‧ Ontology

2T‧‧‧Surface

2B‧‧‧ inside sheet

2A‧‧‧Absorbing core material

2L‧‧‧lateral edge

3‧‧‧Wing members

31‧‧‧1st highlight

32‧‧‧2nd highlight

41‧‧‧1st bonding part

42‧‧‧2nd bonding part

51‧‧‧1st separation paper

52‧‧‧Second separation paper

Fig. 1A is a plan view of an absorbent article in a state in which a wing member is unfolded.

Fig. 1B is a cross-sectional view taken along line IB-IB of Fig. 1A.

Fig. 2A is a plan view of an absorbent article in a state in which a wing member is folded.

Fig. 2B is a cross-sectional view taken along line IIB-IIB of Fig. 2A.

Fig. 3 is a schematic view showing a method of manufacturing an absorbent article.

4 is a partial plan view taken along arrow IV of FIG. 3.

Figure 5 is a partial plan view taken along arrow V of Figure 3.

Fig. 6A is a partial plan view taken along arrow VIA of Fig. 3.

Fig. 6B is a cross-sectional view taken along line VIB-VIB of Fig. 6A.

Fig. 7A is a partial plan view taken along arrow VIIA of Fig. 3.

Fig. 7B is a cross-sectional view taken along line VIIB-VIIB of Fig. 7A.

Fig. 8A is a partial plan view taken along arrow VIIIA of Fig. 3.

Fig. 8B is a cross-sectional view taken along line VIIIB-VIIIB of Fig. 8A.

Fig. 9 is a plan view similar to Fig. 1A showing another example of the protruding portion.

1‧‧‧Absorbables

1C‧‧‧Continuous body of absorbent articles

2A‧‧‧Absorbing core material

2BC‧‧‧Sheet continuum

2BR‧‧‧ inside sheet roller

2TC‧‧‧Surface sheet continuum

3C‧‧‧Wing member continuum

3R‧‧‧Roller

5R‧‧‧Roller

5S‧‧‧Separated paper stock sheet

51C, 52C‧‧‧1st and 2nd separation paper continuum

70‧‧‧Adhesive applicator

71‧‧‧Overlay

72A‧‧‧Support roller

72C‧‧‧Cutting roller

73‧‧‧Adhesive applicator

74‧‧‧Attraction device

75‧‧‧Overlap

76‧‧‧Folding device

AA1, AA2‧‧‧ adhesive applicator

C1~C3‧‧‧ cutting device

R1~R4‧‧‧ driven roller

R5‧‧‧ attracting rollers

3S‧‧‧ wing member raw material sheet

Claims (10)

A method for producing an absorbent article, comprising: a body comprising a surface sheet, an inner sheet, an absorbent core disposed between the surface sheets and the inner sheet; and a wing member having a different member from the body Constructed and joined to the body, the wing members have protruding portions respectively protruding from the side edges of the body, and the protruding portions are respectively provided with a separating paper for fixing the absorbent article to the bonding portion of the clothing and covering the bonding portion The manufacturing method comprises the steps of: cutting the wing member raw material sheet along the cutting line, thereby forming a continuum of the wing member partially connected to the trimming portion; respectively, in the protruding portion of the wing member continuum Forming the adhesive portion, and covering the adhesive portion on one side of the continuous member of the wing member and the adhesive portion on the other side of the continuous member of the wing member by the separate separation paper continuum; the self-wing member continuum a step of removing the trimming portion of the wing member raw material sheet; and cutting the wing member continuous body and the separated paper continuous body in a transverse direction Separation step to form a member having a bonding portion, and the wings of the release paper; and the wings toward the member transport direction to be spaced apart from each other to engage the continuous sheet engaging surface of the step or inside the body of the continuous sheet. The method for producing an absorbent article according to claim 1, wherein the separating step and the joining step are performed in mutually opposite directions. The cutting roller and the supporting roller are carried out. The method for producing an absorbent article according to the first or second aspect of the invention, wherein the separation paper continuous body is located on the cutting roller side, and the wing member continuous body is located on the support roller side, and the separation paper continuous body is conveyed And a continuum of wing members. The method for producing an absorbent article according to claim 1 or 2, wherein the separation paper continuous body is positioned on the support roller side and the wing member continuous body is located on the cutting roller side, and the separation paper continuous body is conveyed. And a continuum of wing members. The method for producing an absorbent article according to claim 1 or 2, wherein the protruding portion is formed with a groove. The method for producing an absorbent article according to claim 1 or 2, wherein in the joining step, the wing member is joined to the inner sheet continuous body, and the manufacturing method further comprises: by using the inner sheet continuous body and the wing member Overlapping and joining to the surface sheet continuum to form a step of forming the absorbent article continuum. The method for producing an absorbent article according to claim 6, wherein in the surface sheet continuous body, the absorbent core material is divided into each other in the conveying direction And disposed, in the forming step, the wing member is superposed on the absorbent core. The method for producing an absorbent article according to claim 6, wherein the manufacturing method further comprises: folding the protruding portion of the wing member onto the surface sheet continuous body and joining the same to each other after the forming step Folding steps. The method for producing an absorbent article according to claim 8, wherein the manufacturing method further comprises: after the folding step, cutting the continuous article of the absorbent article in a transverse direction at a predetermined interval Cut off the steps. The method for producing an absorbent article according to claim 1 or 2, wherein the skin contact surface side of the wing member is made of a non-woven fabric.