WO2007046536A1 - レーザ溶着用材料 - Google Patents

レーザ溶着用材料 Download PDF

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Publication number
WO2007046536A1
WO2007046536A1 PCT/JP2006/321196 JP2006321196W WO2007046536A1 WO 2007046536 A1 WO2007046536 A1 WO 2007046536A1 JP 2006321196 W JP2006321196 W JP 2006321196W WO 2007046536 A1 WO2007046536 A1 WO 2007046536A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser
laser welding
thermoplastic resin
glass fiber
resin composition
Prior art date
Application number
PCT/JP2006/321196
Other languages
English (en)
French (fr)
Inventor
Tsutomu Katayama
Akio Miyamoto
Yasuharu Fukui
Hideki Harada
Original Assignee
Ube Industries, Ltd.
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
Application filed by Ube Industries, Ltd. filed Critical Ube Industries, Ltd.
Priority to JP2007541073A priority Critical patent/JP4894761B2/ja
Priority to EP06822173.8A priority patent/EP1939254B1/en
Priority to US12/083,402 priority patent/US20090159034A1/en
Publication of WO2007046536A1 publication Critical patent/WO2007046536A1/ja

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07Flat, e.g. panels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16Laser beams
    • B29C65/1629Laser beams characterised by the way of heating the interface
    • B29C65/1635Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16Laser beams
    • B29C65/1629Laser beams characterised by the way of heating the interface
    • B29C65/1654Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16Laser beams
    • B29C65/1677Laser beams making use of an absorber or impact modifier
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114Single butt joints
    • B29C66/1142Single butt to butt joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312Single flange to flange joints, the parts to be joined being rigid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B29C66/652General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721Fibre-reinforced materials
    • B29C66/7212Fibre-reinforced materials characterised by the composition of the fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/0405Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
    • C08J5/043Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00Use of ingredients characterised by shape
    • C08K7/02Fibres or whiskers
    • C08K7/04Fibres or whiskers inorganic
    • C08K7/14Glass
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10314Materials for intake systems
    • F02M35/10321Plastics; Composites; Rubbers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/1034Manufacturing and assembling intake systems
    • F02M35/10354Joining multiple sections together
    • F02M35/1036Joining multiple sections together by welding, bonding or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006Joining parts moulded in separate cavities
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16Laser beams
    • B29C65/1603Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1606Ultraviolet [UV] radiation, e.g. by ultraviolet excimer lasers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16Laser beams
    • B29C65/1603Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616Near infrared radiation [NIR], e.g. by YAG lasers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16Laser beams
    • B29C65/1677Laser beams making use of an absorber or impact modifier
    • B29C65/168Laser beams making use of an absorber or impact modifier placed at the interface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16Laser beams
    • B29C65/1677Laser beams making use of an absorber or impact modifier
    • B29C65/1683Laser beams making use of an absorber or impact modifier coated on the article
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82Testing the joint
    • B29C65/8207Testing the joint by mechanical methods
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82Testing the joint
    • B29C65/8207Testing the joint by mechanical methods
    • B29C65/8215Tensile tests
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
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    • B29C66/733General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
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    • B29C66/7377General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73771General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being amorphous
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    • B29C66/7377General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
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    • B29K2995/00Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/1034Manufacturing and assembling intake systems
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249924Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994Fiber embedded in or on the surface of a polymeric matrix

Definitions

  • the present invention relates to a laser welding material for welding resin members together by irradiating a laser beam, and in particular, mechanical properties, low warpage, and refraction.
  • the present invention relates to a laser welding material having excellent one-to-one welding properties.
  • laser welding which is one type of external heating welding
  • the transparent resin material that is transparent to the laser beam and the non-transparent resin material that is not transparent to the laser beam are overlapped and then irradiated with laser light from the transparent resin material side.
  • This is a method that heats and melts the contact surface with the transparent resin material and integrally joins them together, making use of advantages such as three-dimensional bonding, non-contact processing, and the absence of burrs. It is a welding method that is spreading in a wide range of fields.
  • the resin member on the laser transmission side is required to transmit the laser beam to some extent.
  • a laser beam having a wavelength of 1.5 to 2.5 is used (see Japanese Patent No. 3 6 30 2 93), or the crystallinity of the joint is made lower than other parts ( (See Japanese Patent No. 3 5 9 6 4 5 6), however, there is a disadvantage that the range of use is limited, and the blending amount of the glass fiber is 30 wt. On the other hand, there is a problem that sufficient laser transmittance cannot be obtained if the amount exceeds 50%. On the other hand, in order to obtain sufficient bonding strength by reliably welding the contact surfaces of the transmissive resin material and the non-transmissive resin material by laser welding. Is transparent It is necessary to minimize or eliminate the gap between the contact surfaces of the resin material and the non-permeable resin material.
  • the gap between the resin members is caused by warpage deformation of each resin member, but warpage deformation naturally occurs in injection molded products of glass fiber reinforced resin such as polyamide, polyethylene, polyacetal, and polyester. To do.
  • thermoplastic resin as a method to reduce warpage deformation.
  • a convex portion is provided on the transparent resin member, and a concave portion having heights on the left and right walls is provided on the laser light absorption side resin member.
  • the welding area is secured by fitting the two so as to prevent the occurrence of heat, and then injecting laser light from the convex side through the low side of the concave wall to heat the concave part and welding them together.
  • Has been proposed see, for example, Japanese Patent Application Laid-Open No. 2 0 0 2-8 6 5 6 7).
  • the present invention solves the above-mentioned problems and obtains a molded product having excellent laser single-transmission and excellent low warpage, laser single welding, high welding strength, and uniform welding strength.
  • An object is to provide a laser welding material that can be used. Disclosure of the invention
  • the present invention provides a thermoplastic resin comprising (A) a thermoplastic resin, and (B) a glass fiber having a non-circular cross section in which the ratio of the major axis to the minor axis is 1.2 to 10 in a cross section perpendicular to the length direction.
  • the present invention relates to a laser melting material characterized by comprising a resin composition.
  • the present invention also provides a laser welding method of a molded product using the laser welding material and a molded product obtained by laser welding from the laser welding material.
  • FIG. 1A and FIG. 1B show examples of glass fibers used in Examples and Comparative Examples.
  • FIG. 2A and FIG. 2B are a plan view and a side view showing an outline of a test container for laser welding produced in an example of the present invention.
  • FIG. 3 is a schematic view of a test piece for laser welding strength measurement cut out from a laser welding test container prepared in an example of the present invention.
  • the laser welding material of the present invention comprises: (A) a thermoplastic resin; and (B) a glass fiber having a non-circular cross section in which the ratio of the major axis to the minor axis is 1.2 to 10 in a cross section perpendicular to the length direction. It consists of a thermoplastic resin composition.
  • thermoplastic resin (A) used in the present invention any thermoplastic resin (A) can be used as long as it has optical transparency and thermoplasticity.
  • Polyamide resin with excellent toughness and excellent reinforcing effect by glass fiber is preferable.
  • Polyamide resin may be composed of diane and monobasic acid.
  • diamines examples include tetramethylenediamine and hexamethylenediamine.
  • Aliphatic diamines such as menalencia amino and dodecamethylene nyan
  • Aromatics such as metaxylylene diamine • Diamine having a cyclic structure.
  • dicarboxylic acids examples include adipic acid, pebutanedicarponic acid, octanedicarboxylic acid, nonanedicarboxylic acid, undecanedicarboxylic acid, aliphatic diamine, terephthalic acid such as dodecanedicarboxylic acid, and aromatics such as isophthalic acid.
  • dicarboxylic acids having a cyclic structure examples include dicarboxylic acids having a cyclic structure.
  • the lactam is a lactam having 6 to 12 carbon atoms, and examples thereof include ⁇ —force prolactam, enantolactam, undecane lactam, dodecane lactam, ⁇ -pyrrolidone, ⁇ -piperidone and the like.
  • aminocarboxylic acids are aminocarboxylic acids having 6 to 12 carbon atoms, such as 6-aminocaproic acid, 7-aminoheptanoic acid, 9-amino. Nonanoic acid, 1 1 -aminodecanoic acid, 1 2 -aminododecanoic acid.
  • polyamide resin examples include Polyamide 6, Polyamide 66, Polyamide 11, Polyamide 12, Polyamide 6 10, Polyamide 6 1 2, Polyamide 6 66 6 and the like. Can be mentioned.
  • the glass fiber (B) having a non-circular cross section has a ratio of major axis to minor axis of 1.2 to 10 in a cross section perpendicular to the length direction from the viewpoint of low warpage and mechanical properties, preferably 1.5. To 6, more preferably 1.7 to 4.5.
  • the major axis is the distance when the straight line distance between any two points on the cross-sectional figure is the maximum
  • the minor axis is the cross-sectional figure of the straight line perpendicular to the major axis. Take the maximum distance between two intersecting points.
  • the glass fiber (B) having a non-circular cross section has no particular restriction on the cross-sectional shape as long as it has a predetermined ratio of major axis to minor axis, but it is usually an eyebrows shape, an oval shape, a semicircular shape, an arc shape. Shapes, rectangles, parallelograms or similar are used. Practically, eyebrows, ovals, and rectangles are preferred from the viewpoints of fluidity, mechanical properties, and low warpage.
  • the fiber length is usually from 1 to 15 mm, preferably from 1.5 to 12 mn3 ⁇ 4, more preferably from 2 to 6 mm.
  • the surface treatment is performed with a silane coupling agent, a titanium coupling agent, or other polymer or low molecular surface treatment agent.
  • the blending ratio of the glass fiber (B) having a non-circular cross section is preferably 10 to 70% by weight, and more preferably 15 to 60% by weight with respect to the entire thermoplastic resin composition. If the blending ratio is too small, the warp reduction effect does not appear, and if it is too large, the laser transmission becomes worse.
  • the thermoplastic resin composition of the present invention may contain one or more fillers other than glass fibers (B) having a non-circular cross section.
  • the filling As the material, a material having good laser transmittance is preferable, and examples thereof include glass flakes, glass beads, translucent alumina, and silica.
  • the compounding ratio of the non-circular cross-section glass fiber (B) and the filler is preferably in the range of 100: 0 to L0: 90, and in the range of 95: 5 to 20:80. Is more preferable.
  • thermoplastic resin composition of the present invention includes other components within a range not impairing the effects of the present invention, such as plasticizers, impact resistant materials, heat resistant materials, foaming agents, weathering agents, crystal nucleating agents, crystals Enhancer, release agent, lubricant, antistatic agent, flame retardant, flame retardant aid, pigment, dye and other functional imparting agents can be appropriately blended.
  • the method for producing a molded product from the laser welding material of the present invention is not particularly limited, and is usually a thermoplastic resin molding machine such as an extrusion molding machine, a blow molding machine, a compression molding machine, an injection molding machine, etc. Can be manufactured in various shapes.
  • two or more divided bodies constituting the hollow molded product are formed by injection and molding, and then bonded together by laser welding. Can be formed.
  • the laser is made transparent, and the other part is made of a material that absorbs the laser, and the laser beam is transmitted from the laser transmissive part side. And laser-weld both.
  • a material exhibiting laser absorptivity can be obtained by blending an additive having absorptivity with respect to laser light in the laser welding material of the present invention.
  • a laser-absorbing paint may be applied to the surface.
  • two Laser welding can also be performed with a laser-absorbing film sandwiched between these parts.
  • the laser transmittance of the laser welding material of the present invention when used for a laser transmissive part is preferably 20% or more.
  • the laser transmittance in the present invention is determined by the resin composition as A S T M
  • Examples of the colorant that is non-absorbable with respect to laser light include organic dyes such as anthraquinone dyes, perylene series, perinone series, heterocyclic series, disazo series, and monoazo series.
  • inorganic colorants such as carbon black, lacquer oxide pigments, organic pigments such as lid mouth cyanine, system 'pigments, and polymethine pigments.
  • Laser light used for laser welding includes: glass: neodymium + laser, YAG: neodymium 3 + laser, ruby laser, helmoonon laser, krypton laser, argon laser
  • the first light of the semiconductor laser first class, is a semiconductor laser scratch.
  • the wavelength of the laser beam varies depending on the resin material to be joined, and cannot be determined generally, but is preferably 400 nm or more. If the wavelength is shorter than 400 nm, the resin will deteriorate significantly.
  • the output of the laser beam can be adjusted by the scanning speed and the absorption capacity of the first resin member. If the output of the laser beam is low, it will be difficult to melt the joint surfaces of the resin materials, and if the output is high, the resin material will evaporate. Or the quality deteriorates and the strength decreases.
  • IS ⁇ 2 9 4—3 D1 mold (60X60X1.t) is gate-cut immediately after molding under the following molding conditions, left in a moisture-proof container for 48 hours, and then placed on a platen. A weight was placed in the specified corner, and the maximum gap from the surface plate was taken as the amount of sled.
  • Fig. 2 A and Fig. 2B are shown in Fig. 3 in which parts 1 and 2 of the test vessel 10 were prepared by laser welding with the permeable material 1 1 and the absorbent material 1 2 in close contact with each other.
  • the test piece 10 ′ shown was measured at a rate of 5 inmZm in using Tensilon (UTM-I-2500) manufactured by I Entsk.
  • Part 1 Part where there is almost no gap on the mating surface
  • Part 2 Part with a slight gap due to warpage on the mating surface
  • Cross-sectional rectangular glass fiber (C S G 3 P ⁇ — 8 20 0 manufactured by Nitto Boseki Co., Ltd.), ratio of major axis to minor axis 4, fiber diameter 7 mX 2 8; m, length 3 mm (Fig. 1A)
  • the polyamide resin and glass fiber listed in Table 1 were melt-kneaded with a TEX44HCT twin-screw kneader to prepare the desired polyamide resin composition pellets.
  • FIG. 3 shows a cross-sectional shape near the welded portion of the test vessel 10. Laser welding strength was measured using this Fig. 3.
  • Table 1 shows the results of measuring the laser welding strength by the following method.
  • a resin composition obtained by kneading polyamide resin and glass fiber in the proportions shown in Table 1 is used in the cylinder temperature 29 0 and the mold temperature 80 in FIGS. 2A and 2B.
  • the halved body 11 shown is injection molded, and the resin composition containing 0.3% by weight of carbon black is mixed with the resin composition in the ratio shown in Table 1 as an absorption side member.
  • the other halved body 12 was produced under the same conditions, and then set in the semiconductor laser device with the transmission side member and the absorption side member overlapped. Both members were welded by irradiating a laser beam from the transparent member.
  • the laser beam used for laser welding has a wavelength of 9 4 Irradiation was performed under the irradiation conditions of O nm, laser light intensity of 20 W, scanning speed of 1 O mmZ sec, and focal spot diameter of 2 mm. A predetermined location was cut out from the obtained welded member, and the tensile strength of the welded portion was measured.
  • the polyamide resin and glass fiber described in Table 1 were melt-kneaded with a TEX 4 4 HCT twin-screw kneader to prepare a target polyamide resin composition pellet.
  • the obtained pellets were injection molded at a cylinder temperature of 29 ° C. and a mold temperature of 80 ° to produce various test specimens, and various physical properties, laser transmission properties, and the amount of sludge were measured. It was.
  • the laser welding strength was evaluated using the test piece of FIG. 3 described in the example. Table 1 shows the results obtained.
  • the laser welding material of the present invention is excellent in laser transparency and low warpage, and has high welding strength by laser-welding molded parts made of the laser welding material.
  • a molded product having a uniform welding strength can be obtained.
  • it is useful for electrical / electronic applications, automotive applications, general miscellaneous goods applications, building materials, etc.
  • electronic component cases and switches such as personal computers, liquid crystal projectors, mobile devices, mobile phones, etc. Yukuru parts, remote control internal joint parts, electrical parts module parts, engine room module parts, intake hold, under hood parts, radiator parts, instrument panel parts, etc. It is suitably used for a housing or the like.

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Abstract

レーザー透過性に優れ、かつ低そり性にも優れており、レーザー溶着により、溶着強度が高く、しかも溶着強度が均一な成形品を得ることができるレーザー溶着用材料を提供する。このレーザー溶着用材料は(A)熱可塑性樹脂、及び(B)長さ方向に直角の断面において長径と短径の比が1.2~10である非円形断面のガラス繊維を含む熱可塑性樹脂組成物からなることを特徴とする。

Description

レーザー溶着用材料
技術分野
本発明は、 レーザー光を照射することにより樹脂部材同士を溶着 させるレーザー溶着用材料に関し、 特に機械的特性、 低そり性、 レ 明
一ザ一溶着性に優れたレーザ一溶着用材料に関する。 、
背景技術 書 近年、 軽量化及び低コス ト化等の観点より、 自動車部品、 電気部 品等の各種分野の部品を樹脂化して樹脂成形品とすることが頻繁に 行われている。 そして、 樹脂成形品は、 高生産性化等の観点から、 樹脂成形品を予め複数の樹脂部材に分割して成形し、 これらの樹脂 部材を互いに接合して製造する手段が採られることが多くなつてい る。. —
この樹脂部材の接合においては 、 接着剤による接合、 ボル トなど による機械的接合などが行われてきた。 しかしながら、 接着剤では その接着強度が、 また、 ポルトなどによる機械的接合では、 費用、 締結の手間、 重量.増が問題となつている。 一方、 レーザ一溶着、 熱 板溶着などの外部加熱溶着、 振動溶着、 超音波溶着などの摩擦熱'溶 着に関しては短時間で接合が可能であり、 また、 接着剤や金属部品 を使用しないので、 それにかかるコス トや重量増、 環境汚染等の問 題が発生しないことから、 これらの方法による組立が増えてきてい る。
特に、 外部加熱溶着のひとつであるレーザー溶着は、 例えば、 特 開昭 6 0 — 2 1 4 9 3 1 号公報に開示されているようにレーザー光 に対して透過性のある透過樹脂材と、 レーザー光に対して透過性の ない非透過樹脂材とを重ね合わせた後、 透過樹脂材側からレーザー 光を照射することにより、 透過樹脂材と非透過樹脂材との当接面同 士を加熱溶融させて両者を一体的に接合する方法であり、 三次元接 合が可能、 非接触加工、 バリ発生が無いなどの利点を利用して、 幅 広い分野に広がりつつある溶着法である。
このレーザー溶着工法では、 透過樹脂材内を透過する際のレーザ 一光のエネルギーロスが大きければ、 非透過樹脂材及び透過樹脂材 の接合面における加熱溶融が不十分となり、 十分な溶着強度を達成 することができないため、 レーザー透過側の樹脂部材には、 ある程 度レーザ一を透過することが要求される。
ところが、 従来から、 樹脂部材の機械的強度ゃ耐衝撃性を向上さ せるために.繊維状の強化材例えばガラス繊維を樹脂に混合すること が行なわれているが、 例えば、 ポリアミ ド樹脂のレーザ透過性は、 一般的な繊維径が 1 0 // m前後のガラス繊維を配合することにより かなり低下してしまうため、 非透過樹脂材の当接面に十分な量のレ —ザ一エネルギーを到達、 吸収させることが困難になるという問題 が出てきた。
そこで、 レーザー光の波長が 1 . 5〜 2 . 5 のものを用いた り (特許第 3 6 3 0 2 9 3号公報参照) 、 接合部の結晶化度を他の 部分より低く したり (特許第 3 5 9 6 4 5 6号公報参照) すること が提案されているが、 利用範囲が限定されてしまう という欠点があ り、 また、 前記方法によってもガラス繊維の配合量が 3 0重量%を 超えると十分なレーザー透過性が得られなくなるという問題がある 一方、 レーザー溶着により、 透過樹脂材および非透過樹脂材の当 接面同士を確実に溶着させて十分な接合強度を得るためには、 透過 樹脂材および非透過樹脂材の当接面同士の隙間を極力小さ く または 無しにする必要がある。 これは、, 当接面に隙間があると、 非透過樹 脂材の当接面における発熱が透過樹脂材の当接面に熱伝達されにく くなり、 透過樹脂材の当接面における加熱溶融が不十分となって、 非透過樹脂材と透過樹脂材との当接面同士が十分に溶着しなくなる ためであり、 さ ら,には、 非透過樹脂材が溶融したときの溶融膨張に より隙間が埋められて溶着されるため、 非透過樹脂材の見かけ密度 が低卞し、 そのため溶着強度が低下するためである。 、
この樹脂部材間の隙間は、 各樹脂部材の反り変形などに起因する が、 反り変形は、 ポリアミ ド、 ポリエチレン、 ポリアセタール、 ポ リエステル等のガラス繊維強化樹脂の射出成形品では、 当然のよう に発生する。
そのため、 反り変形を低減させる手法として: 非晶性熱可塑性樹 脂を添加併用することが提案されている。 しかし、 一般に非晶性熱 可塑性樹脂を多量に併用することは結晶性熱可塑性樹脂の本来の特 長、 例えば耐薬品性、 熱変形温度等を損なうため好ましくない場合 が多い。
また、 ガラス繊維とカオリ ンや、 マイ力、 タルク等の鉱石粉末と を併せて配合することも提案されている (例えば特開昭 6 0 _ 3 2 8 4 7号公報、 特開平 6 — 2 9 9 0 6 8号公報参照。 ) 。 しかしな がら、 前記のような鉱石粉末を配合すると、 レーザ一透過性が極端 に悪くなつてしまうという問題がある。
さ らに、 樹脂部材に反りがあってもレーザー溶着できる方策とし て、 透過性樹脂部材に凸部を、 レーザー光吸収側樹脂部材に左右の 壁に高低のある凹部を設けて、 両者を隙間の発生を防止するように 嵌合させて、 凹部の壁の低い側を越して凸部側から レーザー光を入 射して凹部を加熱して、 両者を溶着することによる、 溶着面積を確 保する方法が提案されている (例えば特開 2 0 0 2 — 8 6 5 6 7号 公報参照。 )·。
この方法では、 隙間のない溶着は可能となるが、 嵌合する一対の 部材間の位置を機械的に規制 · 矯正しつつ加熱溶融させるため、 矯 正が大きいすなわち反り変形が大きい製品では矯正により発生した 歪が大きくなつて,しまう。 歪がレーザーによって溶融される個所に あれば緩和される力 多くの製品では溶着部とその矯正によって歪 の発生する部位は一致しておらず、 歪が凍結されてしまうおそれが ある。 従って、 製品の使用時に、 トラブルの原因となりやすいク リ ープ破壊や加熱冷却サイクルによる局所的な破壊やクラックの発生 などが懸念される。
更には、 透過側部材に凸部を設けるため 、 レーザー光が肉厚の凸 部を透過す,ることになり、 レ —ザ一光の透過損矢が大きくなり 、 溶 着が不十分になるおそれがある。 ¾Eつて製品形状に制限がある場
、 溶着に適した肉厚を維持できないとい 問題力 ある。
一方、 一般的な繊維径が 1 0 m前後のガラス繊維の代わりに 、 断面が扁平状のガラス繊維で強化することにより、 反りが改善され ることが開示されている (例えば特開平 8 — 2 5 9 , 8 0 8号公報参 照。 ) 。 該公報には、 振動溶着により部 P
PPを接合することが記載さ れているが、 レー.ザ一溶着性については記載はない。
本発明は、 前記問題点を解決し、 レーザ一透過性に優れ、 かつ低 そり性にも優れており、 レーザ一溶着に り、 溶着強度が高く 、 し かも溶着強度が均一な成形品を得ることができるレーザー溶着用材 料を提供することを目的とする。 発明の開示
本発明者らは、 鋭意検討の結果、 長さ方向に直角の断面において 長径と短径の比が 1 . 2〜 1 0である非円形断面のガラス繊維を配 合したポリアミ ド樹脂組成物が、 レーザー透過性に優れることを見 出し、 かつ低そり性にも優れていることから、 該ポリアミ ド樹脂組 成物からなる成形部品同士をレーザー溶着することにより、 溶着強 度が高く、 しかも溶着強度が均一な成形品が得られることを見いだ し、 本発明に到達,した。
すなわち、 本発明は、 (A ) 熱可塑性樹脂、 及び ( B ) 長さ方向 に直角の断面において長径と短径の比が 1 . 2〜 1 0である非円形 断面のガラス繊維を含む熱可塑性樹脂組成物からなることを特徴と するレーザ一溶着用材料に関するものである。 また、 本発明はこの レーザー溶着用材料を用いる成形品のレーザー溶着方法およびレー ザ一溶着用材料からレーザー溶着して得られる成形品を提供する。 図面の簡単な説明
図 1 Aおよび図 1 Bは、 実施例および比較例で使用したガラス繊 維の例を示す。
図 2 Aおよび図 2 Bは、 本発明の実施例 作製したレーザー溶着 用試験容器の概略を示す平面図および側面図である。
図 3は、 本発明の実施例で作製したレーザー溶着用試験容器から 切り出したレーザー溶着強さ測定用の試験片の概略図である。 発明を実施するための最良の形態
本発明のレーザー溶着用材料は、 (A ) 熱可塑性樹脂、 及び (B ) 長さ方向に直角の断面において長径と短径の比が 1 . 2〜 1 0で ある非円形断面のガラス繊維を含む熱可塑性樹脂組成物からなる。 本発明に用いられる熱可塑性樹脂 (A ) としては、 光透過性と熱 可塑性を有していれば用いることができ、 具体的には、 ナイ ロン 6 やナイ ロン 6 6等のポリア F ( P A ) 、 ホリカーボ不一 卜 ( P c
) 、 ァク リ ロ二 卜 リル一ブ夕ジェン スチレン共重合体 ( A B S )
、 ポリエチレン ( P E ) 、 ポリプ □ヒ レン ( P P ) 、 スチレンーァ ク リ ロ二 ト リル共重合体 ( A S ) 、 ポ U Xチレンテレフ夕レー 卜 (
P E T ) 、 ポリ メチルメ夕ク U レ ―卜 ( P M M A ) 等ァク リル系樹 脂 、 ポリスチレン , ( P S ) 、 ポリブチレンテレフタレー ト ( P B T
) 、 ポリ フエ二レンスルフィ ド ( P P S ) 等を用いることができる 特に 耐薬品性 • 靭性等に優れ 、 ガラス繊維による補強効果にも 優れているポリァミ ド樹脂が好ましい
ポリアミ ド樹脂としては 、 ジァ ンと一塩基酸とからなるか、 · ま
たはラクタムもしく はアミ ノカルボノ酸からなる力 またはこれら の 2種以上の共重合体からなるものが挙げられる。
ジァミ ンとしては、 テ 卜ラメチレノジァミ ン、' へキサメチレンジ
— ». 、
ァミ ン、 ォク夕メナレンシァ ^ ノ 、 ノナメチレジァミ ン、 ゥンデ力.
メナレンシアミ ノ 、 ドデカメチレンンァ ン等の脂肪族ジアミ ンゃ
、 メタキシリ レンシァミ ン等の芳香族 • 環状構造を有するジァミ ン が挙げられる。
ジカルボン酸としては、 ァジピン酸 、 ぺブタンジカルポン酸、 ォ クタンジカルボン酸、 ノナンジカルボン酸、 ゥンデカンジカルボン 酸、 ドデカンジカルボン酸等の脂肪族ジアミ ンゃテレフタル酸、 ィ ソフタル酸等の芳香族 · 環状構造を有するジカルボン酸が挙げられ る。
ラクタムとしては、 炭素数 6 〜 1 2 のラクタム類であり、 ε —力 プロラクタム、 ェナン トラクタム、 ゥンデカンラクタム、 ドデカン ラクタム、 α —ピロリ ドン、 α—ピぺリ ドン等が挙げられる。 また 、 アミ ノカルボン酸としては炭素数 6 〜 1 2 のアミノカルボン酸で あり、 6 —アミノカプロン酸、 7 —ァミ ノヘプタン酸、 9 —ァミ ノ ノナン酸、 1 1 —アミ ノウンデカン酸、 1 2 —アミ ノ ドデカン酸が 挙げられる。
ポリ アミ ド樹脂の具体例として,は、 ポリアミ ド 6、 ポリアミ ド 6 6、 ポリアミ ド 1 1 、 ポリアミ ド 1 2、 ポリアミ ド 6 1 0、 ポリア ミ ド 6 1 2、 ポリアミ ド 6 6 6等が挙げられる。
非円形断面のガラス繊維 (B) は、 低反り性と力学特性の観点か ら、 長さ方向に直角の断面において長径と短径の比が 1 . 2〜 1 0 、 好ましく は、 1 . 5〜 6、 より好ましく は、 1 . 7〜 4. 5であ る。 こ こで、 長径とは、 断面図形上の任意の 2点間の直線距離が最 大になったときの、 その距離をとり、 短径とは、 該長径と直交する 直線のうち断面図形と交差する 2点間の距離が最大のものをとる。
また、 非円形断面のガラス繊維 ( B ) は、 所定の長径と短径の比 を有するものであれば、 断面形状に特に制限はないが、 通常、 まゆ 形、 長円形、 半円形、 円弧形、 長方形、 平行四辺形またはこれらの 類似形のものが用いられる。 実用上は、 流動性、 力学特性、 低反り 性の観点から、 まゆ形、 長円形、 長方形が好ましい。 繊維長は、 通 常 l〜 1 5 mm、 好ましく は 1 . 5〜 1 2 mn¾、 より好ましく は 2 〜 6 mmである。 また、 ポリアミ ド樹脂中への分散.性および密着性 を高める目的で、 シランカ ップリ ング剤、 チタンカップリ ング剤、 その他の高分子または低分子の表面処理剤で表面処理されているの が好ましい。
また、 非円形断面のガラス繊維 ( B ) の配合割合は、 熱可塑性樹 脂組成物全体に対して、 1 0〜 7 0重量%が好ましく、 1 5〜 6 0 重量%がより好ましい。 配合割合が少なすぎると反り低減効果が発 現せず、 多すぎるとレーザー透過性が悪くなる。
本発明の熱可塑性樹脂組成物は、 非円形断面のガラス繊維 ( B) 以外の充填材の 1種または 2種以上を含有していてもよい。 該充填 材としては、 レーザー透過性のよいものが好ましく、 ガラスフレイ ク、 ガラスビーズ、 透光性アルミナ、 シリカなどを挙げることがで きる。 非円形断面のガラス繊維 ( B ) と上記充填材の配合比として は、 1 0 0 : 0〜 : L 0 : 9 0の範囲内が好ましく、 9 5 : 5〜 2 0 : 8 0 の範囲内がより好ましい。
また、 本発明の熱可塑性樹脂組成物には、 本発明の効果を損なわ ない範囲で他の成分、 例えば、 可塑剤、 耐衝撃材、 耐熱材、 発泡剤 、 耐候-剤、 結晶核剤、 結晶化促進剤、 離型剤、 滑剤、 帯電防止剤、 難燃剤、 難燃助剤、 顔料、 染料等の機能性付与剤等を適宜配合する ことができる。
本発明のレーザー溶着用材料から成形品を製造する方法について は特に制限はなく、 通常使用される熱可塑性樹脂の成形機、 例えば 、 押出成形機、 ブロー成形機、 圧縮成形機、 射出成形機等を用いて 、 各種形状に製造可能である。
例えば、 イ ンテークマ二ホールド等の中空成形品を製造する場合 には 中空成形品を構成する 2つ以上の分割体を射出.成形によって 形成し、 次いでこれらをレーザー溶着により相互に接合することに よって形成することができる。
この場合、 一方の部品を本発明のレーザー溶着用材料で形成する ことで、 レーザー.透過性とし、 他方の部品をレーザ吸収性を示す材 料で形成し、 レーザー透過性の部品側から レーザー光を照射して両 者をレーザ—溶着する。 レーザー吸収性を示す材料は、 本発明のレーザー溶着用材料にレ 一ザ一光に対して吸収性を有する添加剤を配合することにより得ら れる。
また、 他方の部品をレーザー吸収性を示す材料で形成する代わり に、 表面にレーザ一吸収性の塗料を塗布してもよい。 さ らに、 2つ の部品の間にレーザー吸収性のフィルムを挟んだ状態でレーザー溶 着することもできる。
レーザー透過性の部品に用いられる場合の本発明のレーザー溶着 用材料のレーザー透過率が 2 0 %以上であることが好ましい。
なお、 本発明におけるレーザー透過率は、 樹脂組成物を A S T M
1 号ダンベルの形,状に成形したものについて測定した数値である。 さらに、 2つの部品を同色の着色剤で着色することにより、 同色 同士め樹脂を接合することができるようになり、 接合され,た樹脂部 材の見た目をよくすることができる。
レーザー光に対して非吸収性の着色剤としては、 アンスラキノ ン 系染料、 ペリ レン系、 ペリ ノ ン系、 複素環系、 ジスァゾ系、 モノア ゾ系等の有機系染料が挙げられる。
また、 レーザ一光に対して吸収性を有する着色剤としては 、 カー ボンブラック、 恨口酸化物系顔料等の無機系着色剤 フタ口シァニ ン、系'顔料、 ポリメチン系顔料等の有機系着色剤が挙げられる
レーザ一溶着に用いられるレーザー光としては、 ガラス : ネオジ ム +レーザー、 Y A G : ネオジム 3 +レーザ ―、 ルビ一レーザ一、 へ リ ウムーネオンレーザ一、 ク リプトンレーザ一、 ァルゴンレ —ザ一
、 H 2レーザー、 N 2レ一ザ一、 半導体レーザ一等のレ一ザ一光をあ げることができる より好ましいレーザーとしては 、 半導体レーザ 一である。
レーザー光の波長は、 接合される樹脂材料により異なるためー概 に決定できないが、 4 0 0 n m以上であることが好ましい。 波長が 4 0 0 n mより短いと、 樹脂が著しく劣化する。
また、 レーザー光の出力は、 走査速度と第一樹脂部材の吸収能力 により調整できる。 レーザー光の出力が低いと樹脂材料の接合面を 互いに溶融させることが困難となり、 出力が高いと樹脂材料が蒸発 したり、 変質し強度が低下する問題が生じるようになる。 実施例
以下、 本発明を実施例及び比較例により更に詳細に説明するが、 本発明はこれら実施例に限定されるものではない。
なお、 実施例お.よび比較例において使用した樹脂及び成形品の物 性測定方法を以下に示す。
( 1 ) '引張強さおよび引張破壊ひずみ :
I S 05 2 7 - 1 , 2に従い、 常温下 、 厚み 4 m mの試験片を用 いて引張速度 5 mm / i nで試験を行 た。 ( n = 5 )
( 2 ) 引張弾性率 :
I S 0 5 2 7 - 1 , 2に従い、 常温下 、 厚み 4 m mの試験片を用 いて引張速度 1 mm Z m i nで試験を行つた。 ( n = 5 )
( 3 ) シャルピー衝撃強さ :
I S 0 1 7 9 - 1 に従い、 常温下、 Aノ ツナ入り厚み 4 mmの試 験片を用いてエッジワイズ衝撃試験を行つた。 ( n = 1 0 )
( 4 ) ソ リ量 :
I S〇 2 9 4— 3の D 1金型 ( 6 0 X 6 0 X 1 . t ) を下記の成形 条件で成形直後にゲー トカッ ト し、 防湿容器中 4 8 h r放置後、 定 盤上で規定隅に錘を乗せ、 定盤との最大空隙をソ リ量とした。 ( n
= 5 )
• 溶融樹脂温度 : 2 9 0 °C, 金型温度 : 8 0 °C, 金型内平均射出速 度 : 2 5 0 m m / s e c , 保圧 : 6 0 M P ax 1 5 s e c , 冷却時 間 : 1 0 s e c
( 5 ) レーザ一透過性 :
I S O 2 9 4 — 1および I S O 1 8 7 4に従い射出成形した I S
O 3 1 6 7 B式験片の 1 0 mm幅ス 卜レー 卜部に 9 4 0 n mの半導 体レーザーを照射して透過してきたレーザ一をパワーエネルギーァ ナライザ一 (コヒレン ト · ジャパン社製 Field Master (登録商標 ) GS LM-45) を用いて測定した。
( 6 ) レーザー溶着強さ :
図 2 Aおよび図 2 Bに示す透過材 1 1 と吸収材 1 2 を 密着させ てレーザー溶着を行い作成した試験容器 1 0の部位 1及び部位 2を それぞれ 1 O mm幅に切り出した図 3に示す試験片 1 0 ' について 、 ォ I ェンテツク社製テンシロン(UTM-I-2500)を用いて 5 inmZm i nの速度で測定した。
部位 1 : 合せ面に隙間がほとんどない部位
部位 2 : 合せ面にソ リ による若干の隙間がある部位
• ポリアミ ド樹脂
P A 6 :,ポリアミ ド 6 (宇部興産 (株) 製 ί 0 1 5 Β) • ガラス繊維
G F 1 :
断面形状長方形のガラス繊維 (日東紡績株式会社製 C S G 3 P Α— 8 2 0 ) 、 長径と短径の比 4、 繊維径 7 mX 2 8 ; m、 長 さ 3 mm (図 1 A )
G F 2 :
断面形状円形のガラス繊維 (日東紡績株式会社製 C S 3 D E— 4 5 1 ) 、 長径と短径の比 1、 繊維径 7 ;^ m、 長さ 3 mm (図 1 B)
G F 3 :
断面形状円形のガラス繊維 (日本電気硝子株式会社製 E C S 0 3 T 2 4 9 H) 、 長径と短径の比 1、 繊維径 1 0. 5 m、 長さ 3 mm (図 1 B )
• その他の添加剤 ワラス トナイ ト :
竹原化学工業株式会社製 D E NA KU P 3 2 5 実施例 1〜 4
表 1 に記載したポリアミ ド樹脂およびガラス繊維を T E X 4 4 H C T二軸混練機で溶融混練し、 目的とするポリアミ ド樹脂組成物べ レツ 卜を作成した。
次に'得られたペレツ 卜をシリ ンダー温度 2 9 0 t:、 金型温度 8 0 °Cで射出成形し、 各種試験片を製造した。 図 2 Aおよび図 2 Bは試 験容器 1 0の平面図および側面図を示す。 試験容器 1 0の部位 1お よび部位 2を切り出し、 図 3に示す幅 1 0 mmの試験片 1.0 ' を作 成した。 したがって、 図 3は試験容器 1 0の溶接部付近の断面形状 を示す。 レーザー溶着強さは、 この図 3 を用いそ測定を行った。
この他、 作成したポリアミ ド樹脂組成物の各種試験片を用いて各 種物 ; 、 レーザー透過性、 ソリ量、 を評価した。 得られた結果を表 1 に示す。
また、 以下の方法で、 レーザー溶着強度を測定した結果を表 1 に 示す。 . . 透過側部材として、 ポリアミ ド樹脂およびガラス繊維を表 1 に記 載の割合で混練した樹脂組成物を、 シリ ンダー温度 2 9 0 、 金型 温度 8 0 で図 2 A, 図 2 Bに示す半割体 1 1 を射出成形し、 吸収 側部材として、 表 1 に記載の割合の樹脂組成物に、 さ らにカーボン ブラックを 0. 3重量%配合した樹脂組成物を、 前述の成形と同一 条件でもう一方の半割体 1 2を作製し、 次に、 透過側部材と吸収側 部材を重ね合わせた状態で、 半導体レーザー装置にセッ トした。 透 過側部材からレーザー光を照射して両者を溶着した。
このとき、 レーザ一溶着に用いられたレーザー光は、 波長が 9 4 O n mであり、 レーザー光強度 2 0 W、 スキャ ン速度 1 O mmZ s e c、 焦点径 2 mmの照射条件で照射した。 得られた溶着部材から 既定個所を切出し、 溶着部の引張強さを測定した。
比較例 1〜 5
表 1 に記載したポリ アミ ド樹脂およびガラス繊維を T E X 4 4 H C T二軸混練機で溶融混練し、 目的とするポリアミ ド樹脂組成物べ レツ トを作成した。
次に'得られたペレツ トをシリ ンダー温度 2 9 0 °C、 金型温度 8 0 でで射出成形し、 各種試験片を製造し、 各種物性、 レーザー透過性 、 ソ リ量の測定を行った。 レーザー溶着強さは、 実施例で述べた図 3の試験片を用いて評価した。 得られた結果を表 1 に示す。
また、 実施例 1 と同様にしてレーザー溶着強度を測定した結果を 表 1 に示す.。
表 1
Figure imgf000014_0001
産業上の利用可能性
本発明のレーザー溶着用材料は、 レーザ一透過性に優れ、 かつ低 そり性にも優れており、 該レーザ一溶着用材料からなる成形部品同 士をレーザ—溶着することにより、 溶着強度が高く、 しかも溶着強 度が均一な成形品を得ることができる。 例えば、 電気 · 電子用途、 自動車用途、 一般雑貨用途、 建築部材 等に有用であり、 具体的には、 パソコン、 液晶プロジェクター、 モ パイル機器、 携帯電話等の電子部品ケースおよびスィ ッチ類のモジ ユール品、 リモコン内部接合部品、 電装部品のモジュール品、 ェン ジンルーム内のモジュール部品、 イ ンテークマ二ホールド、 アンダ 一フー ド部品、 ラジェター部品、 イ ンパネなどに用いるコ ック ピッ トモジュール部品、 あるいは筐体等に好適に用いられる。

Claims

1 . ( A) 熱可塑性樹脂、 及び ( B ) 長さ方向に直角の断面にお いて長径と短径の比が 1. 2〜 1 0である非円形断面のガラス繊維 を含む熱可塑性樹脂組成物からなることを特徴とするレーザー溶着 用材料。 ,
2. 熱可塑性樹脂組成物全体に対して、 (A) 熱可塑性樹脂が 9 0〜 3'0重量%でぁり、 ( B) 長さ方向に直角の断面において長径 と短径の比が 1. 2〜 1 0である非円形断面のガラス繊維が 1 0〜
7 0重量%であることを特徴とする 求項 1 に記載のレーザー溶着 用材料 囲
3. ガラス繊維の長さ方向に直角の断面において長径と短径の比 が 1. 5〜 6である請求項 1 に記載のレーザー溶着用材料。
4. 熱可塑性樹脂組成物のレ一ザ ―透過率が 2 0 %以上であるこ とを 徴とする請求項 1 に記載のレ一ザ一溶着用材料。
5. (A) 熱可塑性樹脂が、 ポリァミ ド樹脂である請求項 1記載 のレーザ一溶着用材料。
6. 熱可塑性樹脂組成物がさ らにレ一ザ一吸収性を示す添 Π剤を 含み、 レーザ吸収性を示す請求項 1記載のレーザ一溶着用材料。
7. 請求項 1〜.6に記載のレ一ザ一溶着用材料を成形してなる複 数の部品を相互にレーザー溶着する とを特徴とする成形品のレー ザ一溶着方法。
8. 一方の部品を前記レーザ一溶着用材料で 成形してレーザー 透過性とし、 他方の部品を前記レーザ一溶着用材料にレーザ吸収性 を示す添加剤を添加して 成形してレーザ吸収性とし、 それらの部 品を相互に当接し、 レーザー透過性の部品側からレーザ一光を照射 して両者をレーザ一溶着する請求項 7に記載の方法。
9 . 一方の部品を前記レーザー溶着用材料で 成形してレーザー 透過性とし、,他方の部品の表面にレーザー吸収性の塗料を塗布して 、 それらの部品を相互に当接し、 レーザー透過性の部品側から レー ザ一光を照射して両者をレーザ一溶着する請求項 7 に記載の方法。
1 0 . 前記レーザー溶着用材料で 成形した 2つの部品の間にレ 一ザ一吸収性のフ,イルムを挟んだ状態でレーザー溶着する請求項 7 に記載の方法。
1 1 . 請求項 1 〜 6 に記載のレーザー溶着用材料を成形,してなる 複数の部品を相互にレーザー溶着してなる成形品。
1 '2 . 成形品が自動車エンジンのイ ンテークマ二ホールド或は付 属部品である請求項 1 1 に記載の成形品。
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