CN107405217B - Method and apparatus for manufacturing sheet for absorbent article - Google Patents
Method and apparatus for manufacturing sheet for absorbent article Download PDFInfo
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- CN107405217B CN107405217B CN201580077245.7A CN201580077245A CN107405217B CN 107405217 B CN107405217 B CN 107405217B CN 201580077245 A CN201580077245 A CN 201580077245A CN 107405217 B CN107405217 B CN 107405217B
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- sheet
- shaped sheet
- skin care
- care agent
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- 238000000034 method Methods 0.000 title claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 93
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 7
- 238000007493 shaping process Methods 0.000 claims description 91
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- 239000000194 fatty acid Substances 0.000 description 6
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 239000004745 nonwoven fabric Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
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- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 2
- 239000004255 Butylated hydroxyanisole Substances 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 2
- 208000010201 Exanthema Diseases 0.000 description 2
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- CZBZUDVBLSSABA-UHFFFAOYSA-N butylated hydroxyanisole Chemical compound COC1=CC=C(O)C(C(C)(C)C)=C1.COC1=CC=C(O)C=C1C(C)(C)C CZBZUDVBLSSABA-UHFFFAOYSA-N 0.000 description 2
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- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
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- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 description 1
- QULIOZDJZXKLNY-UHFFFAOYSA-N 3,4,5-trihydroxy-2-propylbenzoic acid Chemical compound CCCC1=C(O)C(O)=C(O)C=C1C(O)=O QULIOZDJZXKLNY-UHFFFAOYSA-N 0.000 description 1
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- 206010021639 Incontinence Diseases 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- BHEOSNUKNHRBNM-UHFFFAOYSA-N Tetramethylsqualene Natural products CC(=C)C(C)CCC(=C)C(C)CCC(C)=CCCC=C(C)CCC(C)C(=C)CCC(C)C(C)=C BHEOSNUKNHRBNM-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 150000001470 diamides Chemical class 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- PRAKJMSDJKAYCZ-UHFFFAOYSA-N dodecahydrosqualene Natural products CC(C)CCCC(C)CCCC(C)CCCCC(C)CCCC(C)CCCC(C)C PRAKJMSDJKAYCZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
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- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- 229940119170 jojoba wax Drugs 0.000 description 1
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- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 239000004248 saffron Substances 0.000 description 1
- 235000013974 saffron Nutrition 0.000 description 1
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- 231100000046 skin rash Toxicity 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229940031439 squalene Drugs 0.000 description 1
- TUHBEKDERLKLEC-UHFFFAOYSA-N squalene Natural products CC(=CCCC(=CCCC(=CCCC=C(/C)CCC=C(/C)CC=C(C)C)C)C)C TUHBEKDERLKLEC-UHFFFAOYSA-N 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
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- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 description 1
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- 210000002700 urine Anatomy 0.000 description 1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
Abstract
The purpose of the present invention is to obtain a method for producing a sheet for an absorbent article, wherein, when a skin care agent is applied to the convex portions of a shaped sheet having convex portions and concave portions, the skin care agent can be prevented from being applied to the bottom portions of the concave portions, and the skin care agent can be stably applied to the convex portions. That is, when a step of applying a hydrophobic skin care agent (17) to the convex portions (11) of the shaped sheet (5) is performed after the shaped sheet forming step, the skin care agent (17) is applied from the first surface (5a) side of the shaped sheet (5) to the convex portions (11) while the shaped sheet (5) is stretched in the conveyance direction (MD) so that the width thereof becomes smaller than the width of the continuous sheet (2).
Description
Technical Field
The present invention relates to a method for producing an absorbent article sheet used for absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads.
Background
For example, in an absorbent article such as a disposable diaper, an absorbent article sheet such as a nonwoven fabric used as a structural member such as a top sheet is widely known as a sheet having a plurality of rows of ridge-like protrusions and groove-like recesses provided between adjacent protrusions on a skin-contacting surface.
When such an absorbent article sheet is used as a top sheet of an absorbent article, the convex portions come into contact with the skin, but because rash or the like may be generated due to stuffiness or the like, a skin care agent may be applied to the convex portions in the production process of the absorbent article sheet. Since the skin care agent is generally hydrophobic, when applied to the top sheet, it is easy to repel excretory fluid such as urine, so that skin rash and the like can be prevented, and it is important that the skin care agent is attached only to the convex portions rather than to the bottom portions of the concave portions in order to allow the excretory fluid to be properly absorbed by the absorbent body of the absorbent article.
In the process of producing the sheet for an absorbent article, as a technique for applying a skin care agent to the convex portions, for example, as described in patent document 1, the skin care agent is sprayed from the first surface side of the shaped sheet, and air is sucked from the second surface opposite to the first surface.
In the shaped sheet used in the technique of patent document 1, the top of the convex portion protruding toward the first surface side is extended in the thickness direction of the sheet to be shaped at the time of shaping, so that the fiber density becomes small, while the bottom of the concave portion is not extended, so that the fiber density becomes higher than that of the top of the convex portion.
Therefore, when air is sucked from the second surface side of the shaped sheet, the amount of air flowing through the top of the convex portion having a low fiber density is large, and when the skin care agent is sprayed, the skin care agent is likely to adhere to the top of the convex portion and the vicinity thereof with the air flow. On the other hand, when air is sucked from the second surface side of the shaped sheet to the bottom of the concave portion having a fiber density greater than that of the top of the convex portion, the amount of air flowing is small compared to the top of the convex portion, and even if the skin care agent is sprayed, the skin care agent tends not to move excessively to the bottom of the concave portion. Patent document 1 utilizes this principle so that the skin care agent adheres only to the top of the convex portion.
However, in the case of the technique of patent document 1, although the skin care agent does tend to adhere to the top of the convex portion easily, since the shaped sheet itself is a sheet such as a nonwoven fabric and is basically a sheet, the flow of air passing through the bottom of the concave portion is not so small.
Therefore, a part of the sprayed skin care agent may move to the bottom of the concave portion by the air flow, and the skin care agent may fall onto the forming sheet without being affected by the air flow passing through the convex portion.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2012 and 143543
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made in an effort to provide a method and an apparatus for manufacturing an absorbent article sheet, which can prevent a skin care agent from being applied to the bottom of a concave portion when the skin care agent is applied to a convex portion of a shaped sheet having the convex portion and the concave portion, and can stably apply the skin care agent to the convex portion.
Means for solving the problems
In order to solve the above problem, a method for manufacturing an absorbent article sheet of the present invention is as follows.
(1) A method for producing a sheet for an absorbent article, comprising a shaped sheet forming step of forming a shaped sheet by passing a continuous sheet continuous in a conveying direction between a pair of shaping rollers having projections and recesses on an outer peripheral surface thereof and engaging with each other, the shaped sheet having a plurality of projections extending in a longitudinal direction and a plurality of recesses provided between the projections on at least a first surface of a second surface opposite to the first surface, and a coating step of coating a hydrophobic skin care agent on the projections, wherein in the coating step, the skin care agent is coated from the first surface side to the projections while the shaped sheet is extended in the conveying direction so that a width thereof becomes smaller than a width of the continuous sheet.
(2) The production method according to the above (1), wherein a heating step of heating the continuous sheet is provided before the shaped sheet forming step, and a cooling step of cooling the shaped sheet is provided after the shaped sheet forming step and before the coating step.
(3) In the production method according to the above (2), in the applying step, the skin care agent is applied only to the convex portions by bringing the skin care agent applying member into contact with the convex portions.
(4) The production method according to any one of the above (1) to (3), wherein in the applying step, the skin care agent is applied to the projections between the pair of shape imparting rollers and a conveying roller provided downstream of the pair of shape imparting rollers in a conveying direction and conveying the shape imparting sheet, and a tension is applied to the shape imparting sheet in the conveying direction by pulling out the shape imparting sheet from between the pair of shape imparting rollers at a peripheral speed higher than a peripheral speed of the pair of shape imparting rollers.
(5) In the production method described in the above (4), the peripheral speed of the transport roller is set to be faster than the peripheral speeds of the pair of shaping rollers by 1 to 15%.
In order to solve the above problem, a manufacturing apparatus of the present invention is as follows.
(6) An apparatus for manufacturing a shaped sheet for an absorbent article, the shaped sheet having a plurality of projections extending in a longitudinal direction and a plurality of recesses provided between the projections on at least a first surface of the shaped sheet and a second surface opposite to the first surface, the projections in the shaped sheet being coated with a hydrophobic skin care agent, wherein the apparatus comprises: a pair of shaping rollers for shaping a continuous sheet that is continuous in a conveying direction by passing the continuous sheet between the pair of shaping rollers, the pair of shaping rollers having a concavo-convex portion on an outer peripheral surface and engaging with each other; a conveying roller provided downstream of the pair of shaping rollers and conveying the shaping sheet; and an application member that applies the skin care agent to the convex portions of the shaped sheet, wherein the conveying roller can convey the shaped sheet while extending the shaped sheet in the conveying direction so that the width thereof becomes smaller than the width of the continuous sheet, and the application member can apply the skin care agent to the convex portions from the first surface side in a state where the shaped sheet is extended in the conveying direction so that the width thereof becomes smaller than the width of the continuous sheet.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, since the distance between the adjacent convex portions is shortened in the regions on both sides of the shaped sheet in the conveying direction, the skin care agent can be easily applied to the convex portions, and the skin care agent is less likely to be applied to the bottom portions of the concave portions. Further, since the shape of the convex portion can be stably maintained by the tension from both sides in the middle region of the shaped sheet in the conveying direction along with the width retraction, the skin care agent can be stably and easily applied to the convex portion. As a result, the skin care agent can be stably applied to the convex portions while the skin care agent is prevented from being applied to the bottom portions of the concave portions of the shaped sheet.
Drawings
Fig. 1 is a schematic view showing an example of a manufacturing apparatus for carrying out an embodiment of a method for manufacturing a sheet for an absorbent article according to the present invention.
Fig. 2 is a plan view of an embodiment of an absorbent article sheet formed by implementing the method for manufacturing an absorbent article sheet according to the present invention using the manufacturing apparatus of fig. 1.
Fig. 3 is a sectional perspective view thereof.
Fig. 4 is a perspective view schematically showing a pair of shaping rollers of the shaping apparatus in the manufacturing apparatus of fig. 1.
Fig. 5 schematically shows a state in which the shaped sheet is elongated in the conveying direction so that the width thereof becomes smaller than the width of the continuous sheet, wherein (a) is a plan view and (b) is a cross-sectional view.
Detailed Description
The method for producing the absorbent article sheet of the present invention will be described in detail below with reference to the drawings.
Fig. 1, 4, and 5 are views showing an example of a manufacturing apparatus for carrying out an embodiment of the method of manufacturing an absorbent article sheet according to the present invention.
The manufacturing apparatus 1 includes an unwinding device 3 and a preheating device 4, a continuous sheet 2 having a predetermined width and being continuous in a conveyance direction MD is wound in a roll shape, the unwinding device 3 unwinds the continuous sheet 2 in the conveyance direction MD, and the preheating device 4 preheats the continuous sheet 2 unwound by the unwinding device 3. The manufacturing apparatus 1 further includes a shaping apparatus 6, and the shaping apparatus 6 stretches the preheated continuous sheet 2 to form a shaped sheet 5 by forming a convex portion and a concave portion on a first surface 5a and a second surface 5b opposite to the first surface 5 a.
Further, the manufacturing apparatus 1 includes: a first transport roller 7 for transporting downstream the shaped sheet 5 shaped by the shaping device 6 in the transport direction MD of the shaping device 6; and a second conveyor roller 8 disposed downstream of the first conveyor roller 7 in the conveyance direction MD. The manufacturing apparatus 1 further includes an applicator 9, and the applicator 9 is disposed between the first conveyor roller 7 and the second conveyor roller 8, and applies the skin care agent to the shaped sheet 5 from the first surface 5a side to form the absorbent article sheet 10.
In the manufacturing apparatus 1 of this embodiment, since the projection 11 of the shaped sheet 5 is formed on the lower side in the shaped apparatus 6, the lower surface of the continuous sheet 2 is the first surface 2a, the upper surface thereof is the second surface 2b, the lower surface of the shaped sheet 5 is the first surface 5a, and the upper surface thereof is the second surface 5b in fig. 1 and 5.
As the continuous sheet of the present invention, a nonwoven fabric, a resin film, or the like can be used, and in the case of a nonwoven fabric, thermoplastic resin fibers are preferably contained. In this embodiment, a nonwoven fabric containing thermoplastic resin fibers is used as the continuous sheet 2 unwound by the unwinding device 3.
The basis weight of the continuous sheet varies depending on the intended use of the formed sheet for absorbent articles, but is usually 10 to 100g/m2. The thickness of the continuous sheet varies depending on the use of the formed sheet for an absorbent article, but is usually 0.1 to 5 mm.
On the other hand, the shaped sheet has projections and recesses on a first surface (for example, front surface) and a second surface (for example, back surface), and the shapes of the projections and recesses are not particularly limited as long as the projections and recesses are present on at least the first surface out of the first surface and the second surface.
The shaped sheet 5 of this embodiment is a substantially wave-shaped sheet formed by alternately folding back on the first surface 5a and the second surface 5 b. The shaped sheet 5 of fig. 2 and 3 has a first surface 5a as an upper side and a second surface 5b as a lower side.
As shown in fig. 2 and 3, the shaped sheet 5 includes a plurality of convex portions 11 that protrude convexly on the first surface 5a side and extend continuously in the conveyance direction MD in parallel with each other, and a plurality of concave portions 12 that are provided between the convex portions 11 and are recessed convexly on the second surface 5b side toward the second surface 5b side. Further, a plurality of concave portions 13 are provided, and the concave portions 13 are provided in the concave portion 12, and are formed so as to be recessed further toward the second surface 5b side than the bottom portions 12a thereof and to protrude toward the second surface 5b side.
In addition, the concave portion 13 is provided with: a vertical wall-shaped peripheral surface 15 extending toward the second surface 5b in a state of being continuous with the bottom 12a of the recess 12, and a bottom 14 provided at an end portion of the peripheral surface 15 closest to the second surface 5b side. Further, the circumferential surface 15 includes: a pair of first circumferential surfaces 15a, 15a extending in the conveyance direction MD and arranged at positions facing each other, and a pair of second circumferential surfaces 15b, 15b extending in the width direction CD and arranged at positions facing each other.
The first peripheral surface 15a is formed with a hole 16 penetrating the first peripheral surface 15a and reaching the second surface 5b side of the shaped sheet 5, and the tension of the fibers of the convex portions 11 is released by the hole 16, whereby the flexibility of movement of the entire convex portions 11 or the fibers forming the convex portions 11 is improved, and the flexibility of the convex portions 11 is improved.
The absorbent article sheet 10 is obtained by applying the skin care agent 17 to the convex portion 11 of the shaped sheet 5, and is suitable for use as a sheet to be disposed on the top sheet of an absorbent article such as a disposable diaper, a sanitary napkin, a urine-proof pad, or a panty liner, or on the side in contact with the skin of a user of the absorbent article such as a leakage barrier.
The skin care agent used in the present invention is not particularly limited as long as it is a hydrophobic skin care agent having a function of protecting or healing the skin of the wearer of the water-absorbent article used in the portion (for example, the top sheet) of the sheet for the water-absorbent article in contact with the skin surface.
For example, as the skin care agent, an oily skin care agent containing a diamide derivative or an oily skin care agent used as a lubricant in the field of cosmetics or the like can be used. In addition, liquid paraffin, silicone oil, animal or vegetable oil (e.g., olive oil or jojoba oil, saffron oil, squalene, etc.), monoglyceride, diglyceride, triglyceride, aliphatic ether (myristyl 1,3-Dimethyl butyl ether, palmityl 1, 3-dimethyl butyl ether, stearyl 1, 3-dimethyl butyl ether, palmityl 1, 3-methylpropyl ether, stearyl 1, 3-methylpropyl ether, etc.), isostearyl cholesteryl ester, paraffin, C12～C22Fatty acid, C12～C44Fatty acid ether, C12～C22Fatty alcohol, vaseline, fatty acid sorbitol ester (any of monoester, diester and triester), polyoxyethylene fatty acid sorbitol ester (any of monoester, diester and triester), metal soap (magnesium stearate, etc.), sucrose fatty acid ester, cyclodextrin fatty acid ester, silicone, and silicone resin. One of these skin care agents may be used alone, or two or more of them may be used in combination.
The skin care agent used in the present invention may be a gel composition, and particularly, a skin care agent capable of retaining various skin care agent components in a gel composition at 38 ℃.
For example, a hydrocarbon oil and a silicone oil held in a styrene-based elastomer (particularly, a styrene-based thermoplastic elastomer) can be used as a skin care agent. The hydrocarbon oil is not particularly limited as long as it is a mixture of carbon and hydrogen, and for example, a cyclic hydrocarbon such as a polyolefin hydrocarbon, a paraffin hydrocarbon, an acetylene hydrocarbon, a hydrocarbon containing two or more double bonds and/or triple bonds, an aromatic hydrocarbon, and an alicyclic hydrocarbon can be used. Examples of the silicone oil include organopolysiloxanes such as dimethylpolysiloxanes and methylphenylpolysiloxanes, and cyclic polysiloxanes such as cyclopentylpolysiloxanes.
The gel composition may contain at least one of a stabilizer, an antioxidant (e.g., BHT (2,6 di-t-butyl-p-phenol), BHA (butylated hydroxyanisole), propyl gallic acid), a light stabilizer, a colorant, a pigment, a perfume, an inorganic powder, an organic powder, and other optional additives, or other components, depending on desired product characteristics.
As shown in fig. 1, the preheating device 4 of the manufacturing apparatus 1 includes a pair of upper and lower heating rollers 21 and 22. The continuous sheet 2 conveyed out is wound around the rotating lower heating roller 22, the second surface 2b of the continuous sheet 2 is brought into contact with the continuous sheet, the second surface 2b side is heated, and then the heated continuous sheet is passed to the rotating upper heating roller 21. Further, the first surface 2a of the delivered continuous sheet 2 is brought into contact with the upper heating roller 21, and the first surface 2a can be heated. Thereby, the preheating device 4 can preheat both surfaces of the first surface 2a and the second surface 2b of the continuous sheet 2.
As shown in fig. 1 and 5, the shaping device 6 includes a pair of upper and lower shaping rollers 25 and 26 rotating at the same circumferential speed, and these shaping rollers 25 and 26 have concave and convex portions engaging with each other. Then, the continuous sheet 2 is passed between the pair of forming rollers 25 and 26, and the position where the outer peripheral surfaces of the pair of forming rollers 25 and 26 are closest to each other is set as the forming position of the continuous sheet 2, thereby forming the formed sheet 5 having the convex portion 11, the concave portion 12, and the concave portion 13.
Here, the first forming roller 25 positioned above is positioned directly above the second forming roller 26 positioned below, the axis of the first forming roller 25 is positioned vertically above the axis of the second forming roller 26, and the axes of these forming rollers 25, 26 are parallel to each other. Accordingly, the continuous sheet 2 is shaped with the portion of the first shaping roller 25 located lowermost and the portion of the second shaping roller 26 located uppermost as a shaping position, and the final shapes of the convex portions 11, the concave portions 12, and the concave portions 13 are determined.
The first shaping roller 25 includes ridges 27 and a plurality of rows of grooves 28 as the uneven portions, the ridges 27 are arranged at regular intervals in the roller width direction, the plurality of rows are provided parallel to each other along the outer peripheral surface of the first shaping roller 25 and extend in the circumferential direction, and the plurality of rows of grooves 28 are provided between the ridges 27, 27.
The height and width of the ridge 27 of the first forming roller 25 and the interval between adjacent ridges 27 (i.e., the groove width of the concave groove 28) are determined in accordance with the relationship among the height and width of the convex portion 11 of the forming sheet 5, the depth and width of the concave portion 12, the size, height and interval of the pins 29 to be described later of the second forming roller 26, the material, thickness, basis weight, and the like of the formed continuous sheet 2.
On the other hand, the second forming roller 26 is provided with a plurality of pins 29 and recesses 30 on the outer peripheral surface as the concave-convex portion, the plurality of pins 29 are provided at a constant interval so as to mesh with the concave grooves 28 of the first forming roller 25, and the recesses 30 are provided between the plurality of pins 29.
As shown in fig. 4, the pins 29 are arranged at a constant interval so as not to contact the ridges 27 of the first forming roller 25 in the roller width direction, and are arranged substantially linearly at a constant interval along the outer peripheral surface of the second forming roller 26 in the roller circumferential direction.
The height and thickness of the pins 29 are determined by the relationship among the depth and width of the concave portions 12 of the shaped sheet 5 formed by shaping, the size and depth of the concave portions 3 in a plan view, the height and width of the ridges 27 of the first shaping roller 25, the interval between adjacent ridges 27, the material, thickness, basis weight, and the like of the shaped continuous sheet 2.
Further, the first conveying roller 7 and the second conveying roller 8 have a roller width larger than the length of the pair of shape-imparting rollers 25 and 26 in the roller width direction in the concave-convex portion of the pair of shape-imparting rollers 25 and 26 of the shape-imparting device 6.
As shown in fig. 5, the first conveying roller 7 and the second conveying roller 8 of this embodiment have a roller width larger than the width of the continuous sheet 2. In this embodiment, the first conveyor roller 7 and the second conveyor roller 8 have the same size and shape, and have the same outer peripheral diameter and roller width.
In this embodiment, the uppermost portions of the first and second transport rollers 7 and 8 are formed at substantially the same height as the shaping sheet 5 is projected from between the pair of shaping rollers 25 and 26. Thereby, the shaping sheet 5 extending from between the pair of shaping rollers 25 and 26 is conveyed substantially horizontally to the first conveying roller 7 and further to the second conveying roller 8.
The coating apparatus 9 coats the skin care agent 17 on the convex portions 11 of the shaped sheet 5 from the first surface 5a side of the shaped sheet 5, and the shaped sheet 5 is used as the absorbent article sheet 10.
The applicator used in the present invention may be a contact type applicator that applies the skin care agent by contacting the applicator member with the projection; or a non-contact type coating device for spraying or discharging the skin care agent to the convex portion to coat the skin care agent on the shaped sheet.
The coating apparatus 9 of this embodiment includes a roll-shaped coating member 41 for coating the skin care agent 17 by contacting the projections 11 of the shaped sheet 5 while rotating in synchronization with the conveyance of the shaped sheet 5, and a backup roller 42 for supporting the shaped sheet 5 when the skin care agent 17 is coated by the coating member 41. Further, a gap is formed between the application member 41 and the support member 42 to allow the skin care agent 17 to be appropriately applied only to the convex portions, and the gap is formed to such an extent that the shaped sheet 5 can contact the tops of the convex portions 11 without breaking the convex portions 11 between the application member 41 and the support roller 42 in an application process to be described later.
Next, a case where the method for manufacturing the absorbent article sheet 10 according to the present embodiment is performed by the manufacturing apparatus 1 having the above-described configuration will be described.
In the method of manufacturing the absorbent article sheet according to the present embodiment, a preheating step of preheating the continuous sheet 2 unwound from the unwinding device 3 and an shaping sheet forming step of stretching the continuous sheet 2 having undergone the preheating step and performing shaping are performed in this order. Thereafter, a drawing step of drawing out and conveying the shaped sheet 5 formed in the shaped sheet forming step from the shaping apparatus 6, a cooling step of cooling the shaped sheet 5 drawn out from the shaping apparatus 6 in the drawing step, and a coating step of coating the shaped sheet 5 after the cooling step with a skin care agent to form the absorbent article sheet 10 are sequentially performed.
In the preheating step, the continuous sheet 2 unwound from the unwinding device 3 and conveyed in the conveyance direction MD is sequentially brought into contact with the outer peripheral surfaces of the pair of upper and lower heating rollers 21 and 22 rotating in the preheating device 4, thereby heating both the second surface 2b and the first surface 2a of the continuous sheet 2 to preheat the sheet. The preheating temperature depends on the type of thermoplastic resin fiber constituting the continuous sheet 2, and for example, in the case of a core-sheath type composite fiber of polyethylene terephthalate (PET) and High Density Polyethylene (HDPE), the temperature of the outer peripheral surface of the heating roll is preferably about 50 to 80 ℃, more preferably about 60 to 70 ℃.
The shaping sheet forming step is a step of loading the continuous sheet 2 conveyed in the preheating step into the shaping apparatus 6 between a pair of upper and lower shaping rollers 25 and 26 rotating while engaging the uneven portions, and shaping the continuous sheet 2 by stretching the continuous sheet 2 by the ridges 27 and the grooves 28 of the first shaping roller 25 and the pins 29 and the recesses 30 of the second shaping roller 26. At this time, the ridge 27 of the first forming roller 25 contacts the second surface 2b of the continuous sheet 2, and the portion of the continuous sheet 2 that contacts is pushed into the concave portion 30 of the second forming roller 26, thereby forming the convex portion 11 of the formed sheet 5.
On the other hand, the plurality of pins 29 arranged in the circumferential direction of the second shaping sheet 26 contact the first surface 2a of the continuous sheet 2, and the portion of the continuous sheet 2 contacting the tip of the pin 29 is pushed into the concave groove 28 of the first shaping roller 25. At this time, a portion of the continuous sheet 2 sandwiched by the contact portions with the pins 29 and the other pins 29 adjacent to the pins 29 in the circumferential direction of the second forming roller is pressed into the concave groove 28 of the first forming roller 25 to become the concave portion 12 of the forming sheet 5.
Further, the tip of the pin 29 of the second forming roller 26 forcibly presses the portion in contact with the continuous sheet 2 into the concave groove 28 of the first forming roller 25 to form the concave portion 13 having the peripheral surface 15 and the bottom portion 14. At this time, in the portions of the continuous sheet 2 that are in contact with both ends of the leading end of the pin 29 in the width direction (roller width direction), the tension when the continuous sheet 2 is pushed in the direction of the second forming roller 26 by the ridge 27 of the first forming roller 25 also helps to scrape or break the thermoplastic resin fibers, forming holes.
In addition, in a state where the first forming roller 25 and the second forming roller 26 mesh and fix the continuous sheet 2, the pin 29 of the second forming roller 26 pushes the abutment portion of the continuous sheet 2 into the concave groove 28 of the first forming roller 25, and the bottom portion 14 having a higher fiber density than the other portions is formed. This improves the rigidity of the shaped sheet 5 and stably maintains the shape of the shaped sheet 5 by the peripheral surface 15.
Here, in the present embodiment, in order to more easily perform the shaping of the continuous sheet 2 in the shaped sheet forming step, the shaping is performed while the continuous sheet 2 is heated again by at least one of the pair of shaping rollers 25 and 26. In this case, the heating temperature of the continuous sheet by the shaping roller is preferably higher than the temperature of preheating the continuous sheet in the preheating step, and for example, in the case of a core-pin type composite fiber of polyethylene terephthalate (PET) and High Density Polyethylene (HDPE), the heating step may be performed at a temperature of about 60 to 70 ℃ (the temperature of the outer peripheral surface of the heating roller), and the heating may be performed at a temperature of about 90 to 100 ℃ (the temperature of the outer peripheral surface of the first shaping roller 25).
In the shaped sheet forming step, the conveying speed of the continuous sheet 2 upstream of the pair of shaping rollers 25 and 26 is set to be higher than the peripheral speed of the pair of shaping rollers 25 and 26. Therefore, when the continuous sheet 2 is shaped by the pair of shaping rollers 25 and 26, deformation of the continuous sheet 2 in the conveyance direction MD can be suppressed. The conveying speed of the continuous sheet is determined by the height of the convex portion of the shaped sheet, the depth of the concave portion, the material of the continuous sheet, and the like.
After the forming step is completed, the drawing step is performed.
In the drawing step, the shaped sheet 5 is drawn out from between the pair of shaping rollers 25 and 26 by the first conveying roller 7 by making the peripheral speed of the first conveying roller 7 higher than the peripheral speeds of the pair of shaping rollers 25 and 26. At this time, since the peripheral speed of the first conveying roller 7 is faster than the peripheral speeds of the pair of shaping rollers 25 and 26, the tension in the conveying direction MD acts on the shaping sheet 5 passing between the pair of shaping rollers 25 and 26.
The peripheral speed of the first conveying roller 7 of the present embodiment is a speed at which: this speed is such that a tension acts on the shaped sheet 5 having passed between the pair of shaping rollers 25 and 26 in the conveyance direction MD, and the shaped sheet 5 is extended in the conveyance direction so that the width thereof becomes smaller than the width of the continuous sheet 2 and further than the original width of the shaped sheet 5 (the width in a state where the tension is not applied in the conveyance direction MD).
In the drawing step, the peripheral speed of the first conveying roller 7 is set to be higher than the peripheral speeds of the pair of shaping rollers 25 and 26 of the shaping apparatus b, and the shaped sheet 5 is drawn out from between the pair of shaping rollers 25 and 26, so that the shaped sheet 5 is taken out from between the shaping rollers 25 and 26 while appropriately maintaining the shapes of the convex portion 11, the concave portion 12, and the concave portion 13. As will be described later, the reason is to easily apply the skin care agent 17 only to the projections 11 in the application step.
After the drawing step, a cooling step is performed in which the shaped sheet 5 drawn out from between the pair of shaping rollers 25, 26 in the drawing step is cooled.
The cooling step is a step of removing heat remaining in the shaped sheet 5 due to the heating of the continuous sheet 2 in the preheating step and the shaped sheet forming step. The shaped sheet 5 may be cooled in the cooling step as long as the heat that is applied to the continuous sheet 2 in the preheating step and the shaped sheet forming step can be removed, and the temperature of the shaped sheet may be lowered to room temperature (in this case, the temperature of the place where the manufacturing apparatus 1 is installed).
Since the skin care agent applied to the shaped sheet 5 in the application step is less likely to be affected by heat by performing the cooling step before the application step, it is possible to suppress the skin care agent 17 from moving from the convex portion 11 to the bottom portion 12a of the concave portion 12 due to a change in the properties of the skin care agent 17 caused by heat of the shaped sheet 5 or a decrease in the viscosity of the skin care agent 17.
In the present embodiment, the temperature of the shaped sheet 5 pulled out from between the pair of shaped rollers 25 and 26 is lowered by conveying the shaped sheet 5 until the skin care agent 17 is applied to the convex portions 11 of the shaped sheet 5 in the application step which is a subsequent step. In the cooling step, the shaped sheet 5 may be forcibly cooled by bringing cooling air into contact with the shaped sheet.
After the cooling step is completed, the coating step is performed.
In this coating step, the shaped sheet 5 is extended in the conveyance direction MD so that the width thereof becomes smaller than the width of the continuous sheet 2. While the shaped sheet 5 is kept in the state of being elongated in the conveyance direction MD, the skin care agent 17 is applied from the first surface 5a side to the convex portion 11.
Here, the reason why the shaped sheet is elongated in the conveying direction so that the width of the shaped sheet becomes smaller than the width of the continuous sheet in a state before passing between the pair of shaping rollers is to easily and stably apply the skin care agent only to the convex portions.
When a skin care agent is applied to the convex portion of the shaped sheet, for example, when the sheet for an absorbent article is used in an absorbent article, it is very important not to apply the skin care agent to the bottom portion of the concave portion of the shaped sheet which is the portion closest to the absorbent body in order to prevent the absorption of excreta liquid of the user of the absorbent article into the absorbent body from being hindered.
As a measure for applying the skin care agent only to the convex portions of the shaped sheet, it is conceivable to make the height difference between the top portions of the convex portions and the bottom portions of the concave portions very noticeable by stably maintaining the shape of the convex portions of the shaped sheet, and to easily apply the skin care agent to the convex portions. In particular, when the skin care agent is applied by a contact-type application device, it is necessary that deformation of the projection (particularly, damage to the projection) does not occur as much as possible against the pressing of the application member which is in direct contact with the projection.
As another measure for applying the skin care agent only to the projections of the shaped sheet, it is conceivable to reduce the distance between adjacent projections, to reduce the range of exposure of the bottom of the recesses of the shaped sheet to the first surface of the shaped sheet, and to suppress the opportunity for the skin care agent to adhere to the bottom of the recesses.
Therefore, in the present invention, the shaped sheet is elongated in the conveying direction so that the width thereof becomes smaller than the width of the continuous sheet, deformation of the convex portions is suppressed, and the distance between adjacent convex portions is reduced.
As will be described in detail below, when the shaped sheet is extended in the conveying direction so that the width of the shaped sheet becomes smaller than the width of the continuous sheet, the shaped sheet is positioned on both ends in the width direction of the shaped sheet (on both ends in the conveying direction of the shaped sheet)Both sides extending in the direction) of the shaped sheet, the width of the shaped sheet is contracted (the width is reduced) with the extension in the conveying direction. At this time, as shown in fig. 5(a) and (b), the width retraction causes a force F in the direction inward of the width direction CD to be generated in the regions at both ends of the shaped sheet 5 in the width direction CD1The side regions 50, 50 extend inward in the width direction CD of the shaped sheet 5. Accordingly, since the convex portions 11 of the side regions 50 and 50 are close to the adjacent convex portions 11, the distance between the adjacent convex portions 11, that is, the width of the concave portion 12 (pitch of the convex portions) is reduced.
In the case shown in fig. 5(b), the side region 50 is a region that enters a portion in the inner direction of the width direction CD of the shaped sheet 5 from the end edge of the width direction CD of the shaped sheet 5 to the extent of 1/4 of the width of the shaped sheet. The central region 51 is a region sandwiched between the side regions 50 and 50, and is a region having a width of about 1/2 degrees of the width of the shaped sheet 5.
When the shaped sheet is extended in the conveying direction so that the width thereof becomes smaller than the width of the continuous sheet, as shown in fig. 5(a), a force F in the direction inside the width direction CD of the shaped sheet 5 is generated in the central region 51 sandwiched between the side regions 50, 50 as the shaped sheet 5 retracts in the width direction1A reaction force of (3), i.e. a force F generated in the outer direction of the width direction CD of the shaped sheet 52。
At this time, as shown in fig. 5(b), since the central region 51 is stretched in the outer direction of the width direction CD of the shaped sheet 5, the distance between the adjacent projections 11 and the projections 11 does not change greatly, and on the contrary, the projections 11 or the fibers forming the projections 11 are in a strained state, and the shape of the projections 11 is stabilized. Therefore, the shape of the convex portion 11 of the shaped sheet 5 can be stably maintained in the central region 51. In particular, even when the application member 41 and the convex portion 11 are brought into contact with each other in the contact type application device 9 as in the present embodiment, the deformation of the convex portion 11 due to the pressing of the application member 41 is suppressed as much as possible, and the application member 41 is also suppressed from coming into contact with the bottom portion 12a of the concave portion 12, so that the skin care agent 17 can be applied only to the convex portion 11.
In the present invention, the skin care agent can be easily and stably applied to the convex portions by utilizing the above-described phenomenon in the central region and the side regions of the shaped sheet, which occurs when the shaped sheet is elongated in the conveying direction so that the width thereof becomes smaller than the width of the continuous sheet.
Here, in the present embodiment, the circumferential speed of the second conveying roller 8 is set to the same speed as the circumferential speed of the first conveying roller 7, and is set to the same speed as the speed at which the shaped sheet 5 is pulled out from between the pair of shaping rollers 25 and 26 by the first conveying roller 7, that is, the conveying speed of the shaped sheet 5 between the pair of shaping rollers 25 and 26 and the first conveying roller 7. Accordingly, although the shaped sheet 5 is directly pulled out from between the pair of shaping rollers 25 and 26 by the first conveying roller 7, since the peripheral speed of the second conveying roller 8 is the same as the peripheral speed of the first conveying roller 7, the tension in the conveying direction MD by the first conveying roller 7 is continuously maintained, and as a result, the shaped sheet 5 is also indirectly pulled out from between the pair of shaping rollers 25 and 26 by the second conveying roller 8.
Therefore, the second transport roller 8 can apply a tension in the transport direction MD to the shaped sheet 5 between the second transport roller 8 and the first transport roller 7, the tension having substantially the same magnitude as the tension in the transport direction MD applied to the shaped sheet 5 between the first transport roller 7 and the pair of shaping rollers 25 and 26. Therefore, the shaped sheet 5 is stretched between the second conveying roller 8 and the first conveying roller 7 to the same extent as the shaped sheet 5 between the first conveying roller 7 and the pair of shaped rollers 25, 26.
As a result, the shaped sheet 5 is stretched in the conveyance direction MD also between the second conveyance roller 8 and the first conveyance roller 7, and the width thereof becomes smaller than the width of the continuous sheet 2. Further, since the distance between the adjacent protrusions 11 is reduced in the side regions 50 of the shaped sheet 5 and the shape of the protrusions 11 of the shaped sheet 5 can be stably maintained in the central region 51, it becomes easy to apply the skin care agent 17 only to the protrusions 11.
As described above, the first conveying roller 7 extends the shaped sheet 5 in the conveying direction MD between the first conveying roller 7 and the pair of shaped rollers 25 and 26 so that the width thereof becomes smaller than the width of the continuous sheet 2. Therefore, at the stage between the first conveyor roller 7 and the pair of shape-imparting rollers 25, 26, such a phenomenon has occurred: the distance between adjacent projections 11 is reduced in the side regions of the shaped sheet 5, and the shape of the projections 11 is stably maintained in the central region.
Thus, such a phenomenon can be further stably exhibited: between the first conveying roller 7 and the second conveying roller 8 that perform the coating process, the distance between the adjacent projections 11 is reduced in the side region 50 of the shaped sheet 5, and the shape of the projections 11 is stably maintained in the central region 51.
The peripheral speeds of the first transport roller and the second transport roller may be set to be higher than the peripheral speeds of the pair of shaping rollers within a range in which the absorbent article sheet is not broken, and preferably, the peripheral speeds of the first transport roller and the second transport roller are set to be higher than the peripheral speeds of the pair of shaping rollers by 1 to 15%.
When the peripheral speed of the conveying roller is not more than 1% of the peripheral speed of the pair of shaping rollers, the shaping sheet may not be sufficiently stretched in the conveying direction, and the width of the shaping sheet may not be smaller than the width of the continuous sheet. Therefore, the distance between adjacent projections 11 is not reduced in the side regions of the shaped sheet, and the shape of the projections 11 may be unstable in the central region. On the other hand, if the peripheral speed of the conveying roller exceeds 15% of the peripheral speed of the pair of shaping rollers, the tension in the conveying direction of the shaped sheet becomes too large, and in some cases, the shaped sheet may be broken.
Further, after the shaped sheet 5 is elongated in the conveyance direction MD, the skin care agent 17 is applied to the convex portion 11 by bringing the applying member 41 of the applying device 9 into contact with the convex portion 11.
Specifically, the coating member 41 in the coating device 9 directly contacts the projection 11 from the first surface 5a side while rotating in the direction along the conveyance direction MD of the shaped sheet 5. In this case, as described above, since the shaped sheet 5 is in a state in which the distance between the adjacent projections 11 is reduced in the side region and the shape of the projections 11 is stably maintained in the central region, the application member 41 can easily be brought into contact with only the top of the projections 11 and the vicinity thereof, and the skin care agent 17 can be stably applied only to the projections 11.
Further, as described above, since the shaped sheet 5 of the present embodiment has the recessed portion 13, more specifically, the bottom portion 14 having the recessed portion 13 with higher rigidity than other portions, the rigidity of the shaped sheet 5 is improved, and the shape of the shaped sheet 5 is stably held by the peripheral surface 15. Therefore, even if the application member 14 comes into contact with the convex portions 11, the irregularities of the shaped sheet 5 are more stably held by the presence of the concave portions 13, and therefore, the application member 41 can be more reliably brought into contact with the convex portions 11, and the skin care agent 17 can be more reliably and stably applied to the convex portions 11.
In the coating step, the skin care agent 17 is applied to the projections 11 of the shaped sheet 5, thereby completing the sheet 10 for an absorbent article for the production purpose.
The absorbent article sheet 10 having been subjected to the coating step is, for example, transported to a manufacturing step of an absorbent article, and is used as, for example, a top sheet of the absorbent article.
As described above, according to the method and apparatus for producing an absorbent article sheet of the present embodiment, in the application step, the skin care agent 17 is applied from the first surface 5a side to the convex portions 11 of the shaped sheet 5 while the shaped sheet 5 is extended in the conveyance direction so that the width thereof becomes smaller than the width of the continuous sheet 2.
In this case, in the side region 50 of the shaped sheet 5, the width of the concave portion 12 is reduced and the distance between the adjacent convex portions 11 is shortened, so that the skin care agent 17 is easily applied to the top portions of the convex portions 11, while the bottom portion 12a of the concave portion 12 is less exposed to the first surface 5a side, so that the skin care agent 17 is not easily applied to the bottom portion 12a of the concave portion 12. In the central region 51 of the shaped sheet 5, the shape of the convex portions 11 is stabilized by the force acting in the direction outside the width direction CD of the shaped sheet 5, and therefore, the skin care agent 17 can be stably and easily applied to the convex portions 11.
As a result, the skin care agent 17 can be stably applied to the convex portion 11 while the skin care agent 17 is prevented from being applied to the bottom portion 12a of the concave portion 12.
In the above embodiment, two conveyance rollers, i.e., the first conveyance roller 7 and the second conveyance roller 8, are disposed as conveyance rollers provided downstream of the pair of shaping rollers 25 and 26. However, the number of the conveying rollers may be one, or three or more as long as the shaped sheet after the shaped sheet forming step can be extended in the conveying direction so that the width of the shaped sheet becomes smaller than the width of the continuous sheet. When there is one conveying roller, the one conveying roller performs both the drawing of the shaped sheet from between the pair of shaped rollers and the extension of the shaped sheet in the conveying direction.
In the above embodiment, the continuous sheet 2 is heated by the shaping roller in the shaping sheet forming step after the preheating step, but the heating of the continuous sheet may be performed only by one of the heating in the preheating step and the heating in the shaping sheet forming step. Alternatively, the heating of the continuous sheet may not necessarily be performed. In addition, the cooling step may be omitted in the case where the continuous sheet is not actively heated.
Description of the reference numerals
2 continuous sheet
4 preheating device
5 sheet for absorbent article
5a first surface of sheet for absorbent article
5b second surface of the shaped sheet 5
6 forming device
7 first conveying roller
8 second conveying roller
9 coating device
11 convex part
12 recess
13 concave part
17 skin care agent
21. 22 heating roller
25 first shaping roller
26 second shaping roller
27 convex edge
28 groove
29 pin
30 concave part (second shape-giving roller)
41 coating member
Claims (7)
1. A method for producing a sheet for use in the production of an absorbent article, comprising a shaped sheet forming step of forming a shaped sheet by passing a continuous sheet that is continuous in a transport direction and has irregularities on an outer peripheral surface thereof between a pair of shaping rollers that mesh with each other, the shaped sheet having a plurality of projections extending in a longitudinal direction on at least a first surface and a second surface opposite to the first surface and a plurality of recesses provided between the projections, and an application step of applying a hydrophobic skin care agent to the projections, wherein,
in the applying step, the skin care agent is applied to the convex portion from the first surface side while the shaped sheet is extended in the conveying direction so that the width thereof becomes smaller than the width of the continuous sheet.
2. The method according to claim 1, wherein a heating step of heating the continuous sheet is provided before the shaping sheet forming step,
the method further comprises a cooling step of cooling the shaped sheet to room temperature after the shaped sheet forming step and before the coating step.
3. The production method according to claim 1, wherein in the applying step, the skin care agent is applied only to the convex portions by bringing an applying member of the skin care agent into contact with the convex portions.
4. The method according to claim 2, wherein in the applying step, the skin care agent is applied only to the convex portions by bringing an applying member of the skin care agent into contact with the convex portions.
5. The production method according to any one of claims 1 to 4, wherein in the coating step, the skin care agent is coated on the convex portion between the pair of shaping rollers and a conveying roller provided downstream of the pair of shaping rollers in a conveying direction and conveying the shaped sheet, and wherein a peripheral speed of the conveying roller is faster than a peripheral speed of the pair of shaping rollers and the shaped sheet is pulled out from between the pair of shaping rollers, whereby a tension is applied to the shaped sheet in the conveying direction.
6. The manufacturing method according to claim 5, wherein a peripheral speed of the conveying roller is faster than a peripheral speed of the pair of shaping rollers by 1 to 15%.
7. An apparatus for manufacturing a shaped sheet for an absorbent article, the shaped sheet having a plurality of projections extending in a longitudinal direction and a plurality of recesses provided between the projections on at least a first surface of the shaped sheet and a second surface opposite to the first surface, the projections on the shaped sheet being coated with a hydrophobic skin care agent, wherein,
the manufacturing apparatus includes: a pair of shaping rollers for shaping a continuous sheet that is continuous in a conveying direction by passing the continuous sheet between the pair of shaping rollers, the pair of shaping rollers having a concavo-convex portion on an outer peripheral surface and engaging with each other; a conveying roller provided downstream of the pair of shaping rollers and conveying the shaping sheet; and a coating member for coating the skin care agent on the convex portion of the shaped sheet,
the conveying roller can convey the shaped sheet while extending the shaped sheet in the conveying direction so that the width of the shaped sheet becomes smaller than the width of the continuous sheet,
the applying member is capable of applying the skin care agent to the convex portion from the first surface side in a state where the shaped sheet is extended in the conveying direction so that the width thereof becomes smaller than the width of the continuous sheet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/061169 WO2016163018A1 (en) | 2015-04-09 | 2015-04-09 | Method and device for producing sheet for use in absorbent articles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107405217A CN107405217A (en) | 2017-11-28 |
| CN107405217B true CN107405217B (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580077245.7A Expired - Fee Related CN107405217B (en) | 2015-04-09 | 2015-04-09 | Method and apparatus for manufacturing sheet for absorbent article |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5881915B1 (en) |
| CN (1) | CN107405217B (en) |
| WO (1) | WO2016163018A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6665025B2 (en) * | 2016-05-13 | 2020-03-13 | 花王株式会社 | Absorbent articles |
| WO2020213733A1 (en) * | 2019-04-19 | 2020-10-22 | ユニ・チャーム株式会社 | Absorbent article |
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- 2015-04-09 CN CN201580077245.7A patent/CN107405217B/en not_active Expired - Fee Related
- 2015-04-09 JP JP2015540777A patent/JP5881915B1/en not_active Expired - Fee Related
- 2015-04-09 WO PCT/JP2015/061169 patent/WO2016163018A1/en active Application Filing
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| JP2009005860A (en) * | 2007-06-27 | 2009-01-15 | Daio Paper Corp | Absorbent article and manufacturing method of moisturizer holding sheet |
| CN102036630A (en) * | 2008-03-25 | 2011-04-27 | 尤妮佳股份有限公司 | Absorptive article |
| CN102665633A (en) * | 2009-11-24 | 2012-09-12 | 花王株式会社 | Absorbent article |
| CN102573732A (en) * | 2009-12-14 | 2012-07-11 | 花王株式会社 | Method for manufacturing absorptive article |
| CN104023684A (en) * | 2010-12-20 | 2014-09-03 | 花王株式会社 | Absorptive article |
| CN103402411A (en) * | 2011-02-28 | 2013-11-20 | 大王制纸株式会社 | Toilet paper production method and toilet paper |
| JP2013078376A (en) * | 2011-09-30 | 2013-05-02 | Unicharm Corp | Absorbent article |
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| Publication number | Publication date |
|---|---|
| JPWO2016163018A1 (en) | 2017-04-27 |
| JP5881915B1 (en) | 2016-03-09 |
| CN107405217A (en) | 2017-11-28 |
| WO2016163018A1 (en) | 2016-10-13 |
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