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WO2023063075A1 - Procédé de fabrication d'étoffe non tissée - Google Patents

Procédé de fabrication d'étoffe non tissée Download PDF

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Publication number
WO2023063075A1
WO2023063075A1 PCT/JP2022/036000 JP2022036000W WO2023063075A1 WO 2023063075 A1 WO2023063075 A1 WO 2023063075A1 JP 2022036000 W JP2022036000 W JP 2022036000W WO 2023063075 A1 WO2023063075 A1 WO 2023063075A1
Authority
WO
WIPO (PCT)
Prior art keywords
fiber
layer
nonwoven fabric
fibers
sheet
Prior art date
Application number
PCT/JP2022/036000
Other languages
English (en)
Japanese (ja)
Inventor
文夫 神野
暁師 徐
Original Assignee
王子ホールディングス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2022131863A external-priority patent/JP2023059820A/ja
Application filed by 王子ホールディングス株式会社 filed Critical 王子ホールディングス株式会社
Publication of WO2023063075A1 publication Critical patent/WO2023063075A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/009—Condensation or reaction polymers
    • D04H3/011—Polyesters
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion

Definitions

  • a nonwoven fabric is a so-called spunbond in which resin-made long fibers discharged from a spinning hole are thinned and stretched and accumulated on a conveyor, and the fibers are fused together by performing heating and pressure with a hot roller. Obtained by the manufacturing method.
  • Polyolefin-based resin is often used as a raw material in the spunbond manufacturing method, but since polyolefin-based resin crystallizes within a few seconds after it is discharged from the spinning holes, it sticks to the hot roller even if it is heated and pressed by the hot roller. never. However, when a resin that crystallizes slowly is used as the material, part of the accumulated resin sticks to the heat roller.
  • the fiber layer forming the second layer and the fiber layer forming the first layer may have low compatibility.
  • Polylactic acid is a biodegradable resin made from lactic acid produced by fermentation of glucose. Since polylactic acid is finally decomposed into carbon dioxide and water by microorganisms or the like, it can reduce environmental load.
  • the cold air device 30 includes a pair of open-type air blowers 31 and 32 arranged at opposing positions.
  • the cooling air device 30 cools the filament assembly F discharged from the spinning device 20 and passing downward from above by blowing cooling air Ac from each of the blowers 31 and 32 .
  • the cooling air device 30 is installed by installing a large type so that one blower 31 can be used as a main, and a small type is selected and installed so that the other blower 32 facing each other can be used as a sub. .
  • the suction chambers 154a, 154b, 154c are installed below the injectors 40 of the ejection devices 10A, 10B, 10C, respectively. , 154b and 154c.
  • the filament assembly Fab (Fa, Fb) collected and held in a sheet form and stacked under the jetting device 10B moves around the suction chamber 154b as the collecting belt 151 moves in the longitudinal direction. 154b-2, and transferred while being sucked and held so as to maintain the sheet shape.
  • the suction chambers 154b and 154c suck the filament aggregates Fb and Fc pulled down from the exits of the injectors 40 of the ejection devices 10B and 10C directly above the collection belts 152 and 153 of the sub-conveyors 52 and 53, respectively.
  • the particles are sucked from below the collecting belt 151 via 52 and 53 to be collected and held in the form of a sheet.
  • These sub-conveyors 52 and 53 sandwich the sheet-like filament aggregates Fb and Fc collected and held on the collection belts 152 and 153, respectively, between them and the collection belt 151 at the bottom to transport the filament assembly Fab. , Fabc downstream.
  • the spinning speed in the ejection devices 10A and 10C is set faster than the line speed of the collection belts 151 and 153.
  • fibers can be deposited in a looped (spiral) shape on the collecting belts 151 and 153, so that the fiber layer C1 can be formed.
  • the fiber layer C1 has a width shrinkage (a width of 230 mm and a reduction rate of the original fabric width after being subjected to a load of 2 kg for 30 seconds) within 15%, and a bulkiness (reciprocal of density) of 20%. That's it.
  • the polylactic acid resin is a crystalline resin
  • its crystallization rate is slow when no nucleating agent is added, and it takes several hours to crystallize even after heating to the optimum temperature (around 110°C). need.
  • a practical crystallization speed can be obtained by adding a nucleating agent to a polylactic acid-based resin. If used as a sanitary product that contacts the skin, there is a risk that the user will feel uncomfortable. For this reason, in the present embodiment, the fiber diameter is reduced without adding a nucleating agent, and the fibers are laminated on the conveying surface in an amorphous state.
  • the crystallization speed of the thermoplastic resin ejected from the ejecting devices 10A and 10C is very fast, and crystallizes within a few seconds of passing through the cooling air device 30. Therefore, the fiber layer C1 and the fiber layer C3 are already crystallized when they are stacked on the main conveyor 51 .
  • a crystallized thermoplastic takes a certain amount of time to melt. Therefore, when heat and pressure are applied by the embossing rolls 61 and 62 in the fusing process, although the fibers constituting the fiber layer C1 and the fiber layer C3 are softened to the extent that they are bonded together, they are separated and the embossing rolls 61 and 62 are separated.
  • Polylactic acid is a biodegradable resin made from lactic acid produced by fermentation of glucose. Since polylactic acid is finally decomposed into carbon dioxide and water by microorganisms or the like, it can reduce environmental load.
  • the fiber diameter of the fibers forming the fiber layer C1 is 15 ⁇ m or less.
  • FIG. 8 is a diagram showing a nonwoven fabric manufacturing apparatus M for manufacturing the nonwoven fabric C according to this embodiment.
  • the nonwoven fabric manufacturing apparatus M includes two sets of jetting devices (fiber jetting devices) 10, which are a plurality of fiber jetting devices. , with a cold air device 30 and an injector 40 .
  • the nonwoven fabric manufacturing apparatus M can manufacture two layers of nonwoven fabric C by providing the ejection devices 10A and 10B.
  • the resin forming the fiber layer C1 is ejected from a fiber spraying device at an ejection pressure (fiber ejection pressure) of 0.11 Mpa or more, stretched, and laminated with a yarn diameter of 15 ⁇ m or less.
  • the manufacturing apparatus M conveys the nonwoven fabric C at a high speed of 40 m/min or more, but polylactic acid fibers have low tensile resistance in the amorphous state. Therefore, if the polylactic acid-based resin is to be made into a thin non-woven fabric using the manufacturing apparatus M described above, there is a risk of breakage during the process due to tension applied during manufacturing.
  • the peeling process (step S104 shown in FIG. 3) is the same as in the second embodiment. That is, the fiber layer C2 of the nonwoven fabric C formed by the embossing device 60A is separated from the fiber layer C1 by the peeling roll 63 provided on the line. The fiber layer C1 separated from the fiber layer C2 is formed and wound up by a winder as a thin biodegradable nonwoven fabric D1. The separated fiber layer C2 is also collected separately. Even with this configuration, a thin nonwoven fabric D1, which is a biodegradable nonwoven fabric, can be obtained. Since the nonwoven fabric D1 is biodegradable and very thin, it can be used as a nonwoven fabric that comes into contact with the wearer's skin, such as absorbent articles and masks.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

La présente invention a pour objet de fabriquer une étoffe non tissée par liaison par fusion d'une couche de résine, qui est lentement cristallisée, au moyen d'un rouleau thermique. La présente invention concerne un procédé de fabrication d'une étoffe non tissée, le procédé comprenant : une étape de pulvérisation de fibres destinée à pulvériser des fibres à partir d'une pluralité de dispositifs de pulvérisation de fibres ; une étape de transport de feuille destinée à collecter un faisceau de fibres pulvérisées à partir de la pluralité de dispositifs de pulvérisation de fibres sur une surface de transport et transporter le faisceau dans la direction de transport tout en formant une couche de fibre en forme de feuille ; et une étape de fusion destinée à appliquer de la chaleur et de la pression au moyen d'un rouleau thermique à la couche de fibres en forme de feuille et fusionner la couche de fibres en forme de feuille, la pluralité de dispositifs de pulvérisation de fibres comprenant au moins un premier dispositif de pulvérisation de fibres servant à former une première couche dans le sens de l'épaisseur sur la surface de transport, et un deuxième dispositif de pulvérisation de fibre servant à pulvériser une fibre comprenant un matériau différent du premier dispositif de pulvérisation de fibres afin de former une deuxième couche dans le sens de l'épaisseur sur la surface de transport.
PCT/JP2022/036000 2021-10-15 2022-09-27 Procédé de fabrication d'étoffe non tissée WO2023063075A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2021-169900 2021-10-15
JP2021169900 2021-10-15
JP2022131863A JP2023059820A (ja) 2021-10-15 2022-08-22 不織布の製造方法
JP2022-131863 2022-08-22

Publications (1)

Publication Number Publication Date
WO2023063075A1 true WO2023063075A1 (fr) 2023-04-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/036000 WO2023063075A1 (fr) 2021-10-15 2022-09-27 Procédé de fabrication d'étoffe non tissée

Country Status (1)

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WO (1) WO2023063075A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08176947A (ja) * 1994-12-20 1996-07-09 New Oji Paper Co Ltd スパンボンド不織布
JP2000245508A (ja) * 1999-03-04 2000-09-12 Toyobo Co Ltd 面ファスナー雌材及びその製造方法
EP1057915A1 (fr) * 1999-06-02 2000-12-06 Unitika Ltd. Tissu non-tissé à base de filaments biodégradables et méthode de fabrication
JP2004036047A (ja) * 2002-07-04 2004-02-05 Daiwabo Co Ltd 機能性複合繊維不織布およびそれを用いた複合組成物
JP2014502551A (ja) * 2011-01-17 2014-02-03 ロイヤル ナチャラル メディシン、エス．アール．オー フェイスマスク及び生産の方法
US20150123304A1 (en) * 2013-11-01 2015-05-07 The Procter & Gamble Company Nonwoven web material including fibers formed of rcecycled polyester, and methods for producing
JP2015229810A (ja) * 2014-06-04 2015-12-21 前田工繊株式会社 積層体、伸縮性不織布及び積層体の製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08176947A (ja) * 1994-12-20 1996-07-09 New Oji Paper Co Ltd スパンボンド不織布
JP2000245508A (ja) * 1999-03-04 2000-09-12 Toyobo Co Ltd 面ファスナー雌材及びその製造方法
EP1057915A1 (fr) * 1999-06-02 2000-12-06 Unitika Ltd. Tissu non-tissé à base de filaments biodégradables et méthode de fabrication
JP2004036047A (ja) * 2002-07-04 2004-02-05 Daiwabo Co Ltd 機能性複合繊維不織布およびそれを用いた複合組成物
JP2014502551A (ja) * 2011-01-17 2014-02-03 ロイヤル ナチャラル メディシン、エス．アール．オー フェイスマスク及び生産の方法
US20150123304A1 (en) * 2013-11-01 2015-05-07 The Procter & Gamble Company Nonwoven web material including fibers formed of rcecycled polyester, and methods for producing
JP2015229810A (ja) * 2014-06-04 2015-12-21 前田工繊株式会社 積層体、伸縮性不織布及び積層体の製造方法

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