WO2023182296A1 - Procédé de fabrication de vêtement sans couture - Google Patents

Procédé de fabrication de vêtement sans couture Download PDF

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Publication number
WO2023182296A1
WO2023182296A1 PCT/JP2023/010959 JP2023010959W WO2023182296A1 WO 2023182296 A1 WO2023182296 A1 WO 2023182296A1 JP 2023010959 W JP2023010959 W JP 2023010959W WO 2023182296 A1 WO2023182296 A1 WO 2023182296A1
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WIPO (PCT)
Prior art keywords
polyol
hot melt
adhesive
fabric
structural unit
Prior art date
Application number
PCT/JP2023/010959
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English (en)
Japanese (ja)
Inventor
亮介 大和
晃一 斉藤
聡一郎 小宮
和樹 久野
花歩 田中
Original Assignee
株式会社レゾナック
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.)
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Publication date
Application filed by 株式会社レゾナック filed Critical 株式会社レゾナック
Priority to CN202380015289.1A priority Critical patent/CN118414099A/zh
Publication of WO2023182296A1 publication Critical patent/WO2023182296A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41H—APPLIANCES OR METHODS FOR MAKING CLOTHES, e.g. FOR DRESS-MAKING OR FOR TAILORING, NOT OTHERWISE PROVIDED FOR
    • A41H43/00—Other methods, machines or appliances
    • A41H43/04—Joining garment parts or blanks by gluing or welding ; Gluing presses
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C09J175/06—Polyurethanes from polyesters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C09J175/08—Polyurethanes from polyethers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/35—Heat-activated

Definitions

  • the present disclosure relates to a method for manufacturing seamless clothing.
  • Hot melt adhesives are solvent-free adhesives, so they have less burden on the environment and the human body, and can be bonded for a short time, so they are suitable for improving productivity.
  • clothing is manufactured by applying the adhesive to the fabric using a coating device and bonding the fabric by heat using a press.
  • the temperature when applying hot melt adhesive is set at a high temperature of 120°C or higher, so the adhesive may change over time at high temperatures, changing the amount of adhesive applied and reducing productivity. .
  • a phenomenon called bleed-through may occur in which the applied adhesive penetrates to the back side of the fabric, resulting in a decrease in the quality of the clothing.
  • the main purpose of the present disclosure is to provide a method for manufacturing seamless clothing that is highly productive and can produce products of stable quality.
  • One aspect of the present disclosure provides a reactive hot spring containing a urethane prepolymer having a polymer chain including a structural unit derived from a polyol and a structural unit derived from a polyisocyanate, and an isocyanate group bonded to the terminal of the polymer chain.
  • the structural unit derived from the polyol is at least one selected from the group consisting of an amorphous polyester polyol without an aromatic ring, a crystalline polyester polyol without an aromatic ring, a polyether polyol, and a polycarbonate polyol.
  • a numerical range indicated using "-" indicates a range that includes the numerical values written before and after "-" as the minimum and maximum values, respectively.
  • the upper limit or lower limit of the numerical range of one step may be replaced with the upper limit or lower limit of the numerical range of another step.
  • the upper limit or lower limit of the numerical range may be replaced with the value shown in the Examples.
  • the upper limit values and lower limit values described individually can be combined arbitrarily.
  • “A or B” may include either A or B, or both.
  • the materials exemplified below may be used alone or in combination of two or more, unless otherwise specified.
  • polyol means a compound having two or more hydroxy groups in the molecule
  • polyisocyanate means a compound having two or more isocyanate groups in the molecule.
  • amorphous and crystalline can be determined by the presence or absence of a melting point (Tm) (an endothermic peak accompanying melting in DSC), and "crystalline” “Amorphous” means that it has no melting point (Tm).
  • amorphous polyester polyol means a polyester polyol that does not have a melting point (Tm)
  • crystalline polyester polyol means a polyester polyol that has a melting point (Tm).
  • the method for producing seamless clothing according to the present embodiment is a urethane prepolymer having a polymer chain containing a structural unit derived from a polyol and a structural unit derived from a polyisocyanate, and an isocyanate group bonded to the end of the polymer chain. and forming an adhesive layer by melting the reactive hot melt adhesive at 60 to 115° C. and applying it to the first fabric using a dispenser. a step of obtaining a laminate by placing a second fabric on the adhesive layer and pressing the second fabric; a step of obtaining an adhesive by curing the adhesive layer in the laminate; Equipped with.
  • the reactive hot melt adhesive (hereinafter sometimes referred to as "adhesive") of one embodiment has a polymer chain containing a structural unit derived from a polyol and a structural unit derived from a polyisocyanate, and a polymer chain containing a structural unit derived from a polyol and a structural unit derived from a polyisocyanate. It contains a urethane prepolymer having attached isocyanate groups.
  • reactive hot melt adhesives have a high molecular weight through a chemical reaction, and can exhibit adhesive strength and the like.
  • Urethane prepolymers that have isocyanate groups bonded to the ends of their polymer chains react with moisture and cure (form a cured product), so the urethane prepolymers alone can act as reactive hot melt adhesives.
  • the reactive hot melt adhesive may contain components other than the urethane prepolymer.
  • the urethane prepolymer has a polymer chain containing a structural unit derived from a polyol and a structural unit derived from a polyisocyanate, and an isocyanate group bonded to the end of the polymer chain.
  • Urethane prepolymers can usually be obtained by reacting polyols with polyisocyanates. Since urethane bonds are formed by the reaction of polyol and polyisocyanate, the polymer chain of the urethane prepolymer has urethane bonds. Furthermore, by increasing the equivalent weight of polyisocyanate relative to the equivalent weight of polyol, an isocyanate group can be introduced at the end of the polymer chain.
  • component (a1) The structural unit derived from the polyol that is component (a) may be referred to as an amorphous polyester polyol having an aromatic ring (hereinafter referred to as "component (a1)"). ) may also contain structural units derived from.
  • Component (a1) is a polyester polyol having an aromatic ring and is an amorphous polyester polyol having no melting point (Tm).
  • the polyester polyol may be a polycondensation reaction product of a polyhydric alcohol and a polycarboxylic acid.
  • Component (a1) can be obtained by using an aromatic polyhydric alcohol (polyhydric alcohol having an aromatic ring) and/or an aromatic polycarboxylic acid (polycarboxylic acid having an aromatic ring). Component (a1) may be used alone or in combination of two or more.
  • the polyester polyol may be a linear polyester diol produced from a diol and a dicarboxylic acid, or a branched polyester triol produced from a triol and a dicarboxylic acid. Further, a branched polyester triol can also be obtained by reacting a diol with a tricarboxylic acid.
  • polyhydric alcohols examples include ethylene glycol, 1,2-propanediol, 1,3-propanediol, isomers of butanediol, isomers of pentanediol, isomers of hexanediol, and 2,2-propanediol.
  • aromatic diol having an aromatic ring
  • One type of polyhydric alcohol may be used alone, or two or more types may be used in combination.
  • aliphatic diols are preferred, more preferably aliphatic diols having 2 to 6 carbon atoms.
  • polycarboxylic acids examples include aromatic polycarboxylic acids (polycarboxylic acids having an aromatic ring) such as phthalic acid, isophthalic acid, terephthalic acid, and 1,2,4-benzenetricarboxylic acid; maleic acid, fumaric acid, and aconite. Acid, 1,2,3-propanetricarboxylic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, azelaic acid, sebacic acid, cyclohexane-1,2-dicarboxylic acid, 1,4-cyclohexadiene-1 , 2-dicarboxylic acid and other aliphatic or alicyclic polycarboxylic acids.
  • aromatic polycarboxylic acids polycarboxylic acids having an aromatic ring
  • phthalic acid such as phthalic acid, isophthalic acid, terephthalic acid, and 1,2,4-benzenetricarboxylic acid
  • maleic acid fuma
  • the aromatic polycarboxylic acid may be a polycarboxylic acid having a benzene ring and two or more carboxy groups bonded to the benzene ring, and is selected from the group consisting of phthalic acid, isophthalic acid, and terephthalic acid. It may be at least one type. One type of polycarboxylic acid may be used alone, or two or more types may be used in combination.
  • polycarboxylic acid derivatives such as carboxylic anhydrides and compounds in which a portion of the carboxy group is esterified can also be used.
  • polycarboxylic acid derivatives include phthalic anhydride, dimethyl terephthalate, dodecylmaleic acid, and octadecenylmaleic acid.
  • Component (a1) may be a polycondensation reaction product of a polyhydric alcohol and a polycarboxylic acid including a polycarboxylic acid having an aromatic ring.
  • the content of structural units derived from compounds having an aromatic ring (aromatic polyhydric alcohol and aromatic polycarboxylic acid)
  • the amount may be, for example, 10 to 60 mol % based on the total amount of structural units constituting the condensation reaction product).
  • the content of the structural unit derived from the compound having an aromatic ring may be 15 mol% or more, 18 mol% or more, or 20 mol% or more, based on the total amount of the structural units constituting the component (a1), It may be 55 mol% or less, 50 mol% or less, or 40 mol% or less.
  • Component is a polycarboxylic acid containing a polyhydric alcohol and an aromatic polycarboxylic acid (a polycarboxylic acid having an aromatic ring, preferably at least one selected from the group consisting of phthalic acid, isophthalic acid, and terephthalic acid)
  • aromatic polycarboxylic acid a polycarboxylic acid having an aromatic ring, preferably at least one selected from the group consisting of phthalic acid, isophthalic acid, and terephthalic acid
  • the content of structural units derived from aromatic polycarboxylic acid is 20 to 100 mol%, 25 to 100 mol%, based on the total amount of structural units derived from polycarboxylic acid. , 30-100 mol%, 35-80 mol%, or 40-60 mol%.
  • the number average molecular weight (Mn) of component (a1) may be 500 to 12,000 from the viewpoint of adhesive strength.
  • the Mn of component (a1) may be 800 or more, 1000 or more, 1200 or more, 1400 or more, or 1500 or more, and may be 11000 or less, 10000 or less, 9000 or less, 6000 or less, or 4000 or less.
  • Mn is a value measured by gel permeation chromatography (GPC) and converted to standard polystyrene.
  • GPC measurement for determining Mn can be performed, for example, under the following conditions.
  • the content of component (a1) (a structural unit derived from component (a1)) is determined from the viewpoint of improving the adhesive strength and elasticity of the urethane prepolymer (reactive hot melt adhesive). ) may be 70% by mass or more, 75% by mass or more, or 78% by mass or more, based on the total amount of the structural unit derived from the component).
  • the upper limit of the content of component (a1) may be 95% by mass or less, 90% by mass or less, or 85% by mass or less, based on the total amount of component (a).
  • component (a1) (constituent units derived from component (a1)) has better adhesion and elasticity, so the total amount of component (a) (constituent units derived from component (a)) is When 100 mol%, it may be 75 mol% or more, 78 mol% or more, or 80 mol% or more, and may be 100 mol% or less, 98 mol% or less, or 95 mol% or less.
  • the structural unit derived from component (a) may further include a structural unit derived from a polyol other than the amorphous polyester polyol having an aromatic ring (hereinafter sometimes referred to as "component (a2)").
  • Component (a2) is a polyol other than the amorphous polyester polyol having an aromatic ring.
  • Component (a2) includes, for example, an amorphous polyester polyol without an aromatic ring, a crystalline polyester polyol with an aromatic ring, a crystalline polyester polyol without an aromatic ring, a polyether polyol, a polyether ester polyol, and a polyurethane polyol. , polycarbonate polyols, and polyolefin polyols.
  • the component (a) is selected from, for example, an amorphous polyester polyol without an aromatic ring, a crystalline polyester polyol without an aromatic ring, a polyether polyol, and a polycarbonate polyol as the component (a2).
  • the polyether polyol may contain at least one selected from the group consisting of: furthermore, from the viewpoint of improving initial adhesive strength, it may contain an amorphous polyether polyol having an aromatic ring.
  • the amorphous polyether polyol having an aromatic ring may be an amorphous polyether polyol having a bisphenol skeleton, and the bisphenol skeleton may be a bisphenol A skeleton or a bisphenol F skeleton.
  • the amorphous polyether polyol having a bisphenol A skeleton or a bisphenol F skeleton may be one in which bisphenol A or bisphenol F is modified with an alkylene oxide, and more specifically, one modified with ethylene oxide or propylene oxide. It may be.
  • component (a) contains such an amorphous polyether polyol having a bisphenol skeleton as component (a2), it tends to have better adhesive strength.
  • the content of the amorphous polyether polyol having a bisphenol skeleton may be 0 to 10% by mass, based on the total amount of component (a) (constituent units derived from component (a)), 1% by mass or more, It may be 2% by mass or more, or 3% by mass or more, and may be 8% by mass or less, 6% by mass or less, or 5% by mass or less.
  • the content of the amorphous polyether polyol having an aromatic ring having a bisphenol skeleton is 0 to 10 mol% when the total amount of component (a) (constituent units derived from component (a)) is 100 mol%. It may be 1 mol% or more, 2 mol% or more, or 3 mol% or more, and may be 8 mol% or less, 6 mol% or less, or 5 mol% or less.
  • the Mn of component (a2) may be 100 to 10,000 from the viewpoint of lowering the viscosity of the urethane prepolymer.
  • the Mn of component (a2) may be 300 or more, 400 or more, or 1000 or more, or 8000 or less, 6000 or less, or 5000 or less.
  • Mn is a value measured by gel permeation chromatography (GPC) and converted to standard polystyrene.
  • component (a) contains an amorphous polyether polyol having an aromatic ring as the component (a2)
  • the amorphous polyether polyol having an aromatic ring (derived from an amorphous polyether polyol having an aromatic ring)
  • the content of structural units) may be 0.1 to 10% by mass, based on the total amount of component (a) (structural units derived from component (a)), and may be 0.5% by mass or more or 1% by mass. It may be more than 7% by mass or less than 5% by mass.
  • the polyisocyanate which is the component (b) can be used without particular limitation as long as it is a compound having two or more isocyanate groups.
  • the polyisocyanate may be a compound having two isocyanate groups (diisocyanate).
  • examples of the polyisocyanate include aromatic isocyanates such as diphenylmethane diisocyanate (4,4'-diphenylmethane diisocyanate), dimethyldiphenylmethane diisocyanate, tolylene diisocyanate, xylylene diisocyanate, p-phenylene diisocyanate; dicyclohexylmethane diisocyanate, isophorone diisocyanate, etc.
  • polyisocyanate examples include alicyclic isocyanates; and aliphatic isocyanates such as hexamethylene diisocyanate.
  • the polyisocyanate preferably contains aromatic diisocyanate, and more preferably contains diphenylmethane diisocyanate.
  • One type of polyisocyanate may be used alone, or two or more types may be used in combination.
  • the urethane prepolymer can be synthesized by reacting component (a) containing component (a1) in a predetermined content with component (b).
  • the urethane prepolymer has a structural unit derived from component (a) containing a structural unit derived from component (a1), and a polymer chain containing a structural unit derived from component (b), which is bonded to the terminal of the polymer chain. It has an isocyanate group.
  • the equivalent ratio of isocyanate groups (NCO) in component (b) to hydroxy groups (OH) in component (a) (equivalent of isocyanate groups (NCO) in component (b)/(a
  • the hydroxy group (OH) equivalent (NCO/OH) of component ) may be 1.1 or more, and may be from 1.1 to 2.1.
  • NCO/OH is 1.1 or more
  • the urethane prepolymer has an isocyanate group bonded to the end of the polymer chain, and an increase in the viscosity of the urethane prepolymer can be suppressed, further improving workability. There is a tendency.
  • NCO/OH is 2.1 or less, foaming becomes difficult to occur during the moisture curing reaction of the reactive hot melt adhesive, and a decrease in adhesive strength tends to be easily suppressed.
  • the temperature and time for reacting component (a) and component (b) when synthesizing a urethane prepolymer are not particularly limited, but may be, for example, 85 to 120°C and 0.1 minute to 48 hours.
  • the reactive hot melt adhesive may further contain a catalyst from the viewpoint of accelerating the curing of the urethane prepolymer and developing higher adhesive strength.
  • a catalyst from the viewpoint of accelerating the curing of the urethane prepolymer and developing higher adhesive strength.
  • the catalyst include dibutyltin dilaurate, dibutyltin octate, dimethylcyclohexylamine, dimethylbenzylamine, trioctylamine, and dimorpholinodiethyl ether (bis(2-morpholinoethyl)ether).
  • the content of catalyst may be from 0.001 to 0.5% by weight, based on the total amount of reactive hot melt adhesive.
  • the reactive hot melt adhesive may further contain a thermoplastic polymer from the viewpoint of increasing the rubber elasticity of the formed adhesive layer and further improving the impact resistance.
  • thermoplastic polymers include polyurethane, ethylene copolymers, propylene copolymers, vinyl chloride copolymers, acrylic copolymers, and styrene-conjugated diene block copolymers.
  • the content of thermoplastic polymer may be from 0.1 to 50% by weight, based on the total amount of reactive hot melt adhesive.
  • the reactive hot melt adhesive may further contain a tackifier resin from the viewpoint of imparting stronger adhesive force to the formed adhesive layer.
  • a tackifier resin examples include rosin resin, rosin ester resin, hydrogenated rosin ester resin, terpene resin, terpene phenol resin, hydrogenated terpene resin, petroleum resin, hydrogenated petroleum resin, coumaron resin, ketone resin, styrene resin, Examples include modified styrene resins, xylene resins, and epoxy resins.
  • the content of the tackifying resin may be 0.1 to 50% by weight, based on the total amount of the reactive hot melt adhesive.
  • the reactive hot melt adhesive may further contain other components as necessary.
  • Other components include, for example, antioxidants, pigments, ultraviolet absorbers, surfactants, flame retardants, fillers, photochromic agents, thermal color inhibitors, fragrances, imaging agents, and thermal crosslinking agents.
  • the content of other components may be 0.001 to 10% by mass based on the total amount of the reactive hot melt adhesive.
  • the viscosity of the hot melt adhesive at 120°C before application is 0.1 Pa.s or more, 0.5 Pa.s or more, 1 Pa.s or more, 2 Pa.s or more, 4 Pa.s or more, or 6 Pa.s or more. It may be 30 Pa.s or less, 25 Pa.s or less, 20 Pa.s or less, 18 Pa.s or less, 16 Pa.s or less, or 14 Pa.s or less.
  • the viscosity at 120° C. is within the above-mentioned range, workability when applying with a dispenser is improved.
  • the viscosity of a hot melt adhesive at 120°C means a value measured by the method described in Examples.
  • the adhesive layer is formed by melting a reactive hot melt adhesive at 60 to 115° C. and applying it to a predetermined portion of the first fabric using a dispenser.
  • the heating stability of the adhesive is improved, and it is possible to suppress the adhesive from seeping into the fabric, creating products with stable quality. can.
  • the application temperature of the reactive hot melt adhesive is 120°C or higher, the viscosity of the adhesive will drop too much and the adhesive will easily impregnate the fabric, causing the adhesive to stain the back side of the fabric. It becomes easier to take out.
  • the adhesive is continuously heated at a temperature of 120° C. or higher, the adhesive may thicken before being applied, making it impossible to apply it continuously. The reason for the increase in viscosity is thought to be that allophanate or biuret bonds (three-dimensional crosslinks) are likely to be formed in the adhesive.
  • the temperature at which the adhesive is melted is 114°C or lower, 112°C or lower, 110°C or lower, 105°C or lower, or 100°C from the viewpoint of improving the heating stability of the adhesive and suppressing the adhesive from seeping into the fabric. It may be the following. From the viewpoint of improving workability, the temperature at which the adhesive is melted may be 70°C or higher, 80°C or higher, 85°C or higher, or 90°C or higher. The temperature at which the adhesive is melted may be, for example, 70-114°C, 80-112°C, 85-110°C, 90-110°C, 90-105°C, or 90-100°C.
  • a dispenser is used to apply the reactive hot melt adhesive to the first fabric.
  • Dispensers are suitable for applying reactive hot melt adhesives to small areas such as small parts.
  • the coating pattern of the reactive hot melt adhesive can be set as appropriate, and examples thereof include dotted, linear, zigzag, planar, and curved coating patterns.
  • the first fabric and the second fabric may be the same fabric or different fabrics.
  • the first fabric and the second fabric may be two separated pieces of fabric, or may be two different pieces of fabric that are not separated.
  • laminate The laminate is produced by placing a second fabric on an adhesive layer and applying pressure from above the second fabric to bond the first fabric and the second fabric together via the adhesive layer. It can be obtained with
  • Examples of the method for crimping the second fabric include a method of crimping using a pressure roll or the like.
  • the pressure during crimping is 0.1 to 10 kgf/cm 2 (0.0098 to 0.98 MPa), 0.2 to 5 kgf/cm 2 (0.0196 to 0.49 MPa), or 0.2 to 1 kgf/cm 2 (0.0196 to 0.49 MPa).
  • the temperature during pressure bonding may be 60 to 115°C, 75 to 100°C, or 80 to 90°C.
  • the temperature of the reactive hot melt adhesive is 23°C, 50% It can be cured by leaving it for 24 hours (curing) at RH (relative humidity).
  • the reactive hot melt adhesive in the adhesive layer is cured by moisture, and an adhesive body in which the fabrics are bonded together can be obtained.
  • the adhesive layer in the adhesive body contains a cured product of a reactive hot melt adhesive.
  • the obtained urethane prepolymer has a polymer chain containing a structural unit derived from a polyol and a structural unit derived from a polyisocyanate, and is bonded to the terminal of the polymer chain. It is presumed that it has an isocyanate group.
  • the obtained urethane prepolymer was used as it is as a reactive hot melt adhesive.
  • Amorphous polyester polyol having an aromatic ring Amorphous polyester polyol having an aromatic ring (hydroxyl group Number: 2, Mn: 2000, Content of structural units derived from compounds having aromatic rings: 25 mol% (based on the total amount of structural units constituting the amorphous polyester polyol), 50 mol% (structure derived from dicarboxylic acid) Based on total unit quantity))
  • Amorphous polyester polyol without aromatic rings Amorphous polyester polyol without aromatic rings, consisting mainly of dicarboxylic acid (adipic acid) and diol (1,4-butanediol and neopentyl glycol) polyester polyol (number of hydroxyl groups: 2, Mn: 5000)
  • Amorphous polyether polyol having an aromatic ring bisphenol A/PO type (manufactured by ADEKA Co., Ltd., product name: BPX-11, number of hydroxyl groups: 2, Mn: 360)
  • the reactive hot melt adhesive was continuously discharged at each temperature shown in Table 1 using a contact air dispenser. After 24 hours, the adhesive was removed from the apparatus and its melt viscosity at 120°C was measured. Table 1 shows the increase ratio of the viscosity after 24 hours of heating to the initial viscosity of the hot melt adhesive.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

Le procédé de fabrication de vêtement sans couture de l'invention comporte : une étape au cours de laquelle un adhésif thermofusible réactif comprenant un prépolymère uréthane, est préparé, lequel prépolymère uréthane possède d'une part une chaîne polymère contenant une unité structurale dérivée d'un polyol et une unité structurale dérivée d'un polyisocyanate, et d'autre part un groupe isocyanate lié à une extrémité de la chaîne polymère ; une étape au cours de laquelle l'adhésif thermofusible réactif est mis en fusion entre ６０ et １１５℃, et est appliqué sur un premier tissu à l'aide d'un distributeur, formant ainsi une couche d'adhésif ; une étape au cours de laquelle un second tissu est disposé sur la couche d'adhésif, le second tissu est collé par pression, et un stratifié est obtenu ; et une étape au cours de laquelle un corps lié est obtenu par durcissement de la couche d'adhésif dans le stratifié.
PCT/JP2023/010959 2022-03-22 2023-03-20 Procédé de fabrication de vêtement sans couture WO2023182296A1 (fr)

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CN202380015289.1A CN118414099A (zh) 2022-03-22 2023-03-20 无缝制衣物的制造方法

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JP2022044996 2022-03-22
JP2022-044996 2022-03-22

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