WO2012105653A1 - タイヤ、及びタイヤの製造方法 - Google Patents

タイヤ、及びタイヤの製造方法 Download PDF

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Publication number
WO2012105653A1
WO2012105653A1 PCT/JP2012/052409 JP2012052409W WO2012105653A1 WO 2012105653 A1 WO2012105653 A1 WO 2012105653A1 JP 2012052409 W JP2012052409 W JP 2012052409W WO 2012105653 A1 WO2012105653 A1 WO 2012105653A1
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WO
WIPO (PCT)
Prior art keywords
tire
thermoplastic material
colored
colorant
manufacturing
Prior art date
Application number
PCT/JP2012/052409
Other languages
English (en)
French (fr)
Inventor
好秀 河野
誓志 今
圭一 長谷川
Original Assignee
株式会社ブリヂストン
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Filing date
Publication date
Application filed by 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Priority to US13/982,525 priority Critical patent/US20130316181A1/en
Priority to EP12742004.0A priority patent/EP2671732B1/en
Priority to CN201280007495.XA priority patent/CN103338946B/zh
Publication of WO2012105653A1 publication Critical patent/WO2012105653A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
    • B60C13/001—Decorating, marking or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining 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
    • B29C65/1429—Joining 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 characterised by the way of heating the interface
    • B29C65/1432—Joining 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 characterised by the way of heating the interface direct heating of the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2053—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position
    • B29C65/2061—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position by sliding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint 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
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    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General 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
    • B29C66/51—Joining 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General 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
    • B29C66/73—General 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
    • B29C66/733—General 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
    • B29C66/7332—General 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 at least one of the parts to be joined being coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General 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
    • B29C66/73—General 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
    • B29C66/739—General 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
    • B29C66/7392—General 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General 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
    • B29C66/73—General 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
    • B29C66/739—General 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
    • B29C66/7392—General 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
    • B29C66/73921—General 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General 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
    • B29C66/73—General 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
    • B29C66/739—General 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
    • B29C66/7394—General 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 thermoset
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/72—Side-walls
    • B29D2030/728—Decorating or marking the sidewalls after tyre vulcanization
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00—Pneumatic or solid tyres or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/723—Articles for displaying or advertising
    • B29L2031/7232—Signs, symbols, plates, panels, boards
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31554—Next to second layer of polyamidoester
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/31728—Next to second layer of polyamide
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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    • Y10T428/31504—Composite [nonstructural laminate]
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    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31928—Ester, halide or nitrile of addition polymer
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31935—Ester, halide or nitrile of addition polymer

Definitions

  • the present invention relates to a tire to be mounted on a rim and a method for manufacturing the tire, and more particularly to a tire at least partially formed of a thermoplastic material and a method for manufacturing the tire.
  • pneumatic tires made of rubber, organic fiber materials, steel members, and the like are used in vehicles such as passenger cars.
  • vehicles such as passenger cars.
  • recycled rubber after use there is a limit to the use of recycled rubber after use, and it has been disposed of by incineration and thermal recycling, crushing it and using it as road pavement material.
  • Patent Document 1 discloses a pneumatic tire formed using a thermoplastic polymer material.
  • a tire using a thermoplastic polymer material is easy to manufacture and low in cost as compared with a conventional rubber tire.
  • the side rubber is mostly black rubber containing carbon black.
  • Various methods for providing a design and a color pattern have been proposed for this rubber pneumatic tire.
  • In order to colorize a black rubber pneumatic tire there is a method of laminating colored rubber at the time of molding the tire, but there is a problem that the process is complicated and difficult to manufacture. Also, with this method, since the color is determined at the time of manufacture, it is difficult to prepare many options.
  • the present invention has been made to solve the above problems, and it is an object of the present invention to provide a tire that uses a thermoplastic resin and that can be easily manufactured without running out of color due to running, and a method for manufacturing the tire. It is.
  • the tire according to the first aspect is at least partially molded from a thermoplastic material containing a colorant.
  • thermoplastic material itself is usually transparent or translucent, but in the tire according to the first aspect, the thermoplastic material is colored with a colorant.
  • the thermoplastic material is colored with the colorant, the color does not drop by running.
  • a colored thermoplastic material can be obtained simply by mixing a colorant with the thermoplastic material, a colored tire can be easily produced.
  • the tire manufacturing method includes a coloring step of adding a colorant to the thermoplastic material, and a molding step of molding at least a part of the tire using the thermoplastic material containing the colorant.
  • a coloring agent is provided to a thermoplastic material.
  • the molding step at least a part of the tire is molded using the thermoplastic material containing the colorant.
  • the tire according to the third aspect is thermally welded to a surface of a tire body at least partly formed of a first thermoplastic material and a portion of the tire body formed of the first thermoplastic material, A colored member formed of a second thermoplastic material containing a colorant.
  • the colored member formed of the second thermoplastic material containing the colorant is firmly bonded to the surface of the portion formed of the first thermoplastic material of the tire body by heat welding. Therefore, like a conventional tire in which a sheet-like colored member is attached to a tire body with an adhesive, the colored member does not have to be peeled off from the tire body even if the tire is repeatedly deformed by running, and the color is changed by running. It wo n’t fall. Since the colored member is thermally welded to the tire body, a colored tire can be manufactured efficiently.
  • a tire manufacturing method including: a surface of a portion of the tire body formed of the first thermoplastic material, at least part of which is formed of the first thermoplastic material; and a colorant.
  • action of the manufacturing method of the tire which concerns on a 4th aspect is demonstrated.
  • the melting step at least part of the surface of the tire body formed of the first thermoplastic material and the surface of the portion formed of the first thermoplastic material, and the second thermoplastic material containing the colorant are formed.
  • At least one of the colored members is heated to soften or melt at least one of the surface of the portion of the tire body formed of the first thermoplastic material and the surface of the colored member.
  • the tire body and the colored member are brought into contact with each other to weld the tire body and the colored member. Thereby, the colored tire can be manufactured easily. If a plurality of different colored members are prepared, tires of various colors can be easily manufactured.
  • a colored member formed of a second thermoplastic material containing a colorant is thermally welded to a surface of a portion formed of the first thermoplastic material of the tire body. Therefore, even if the tire is repeatedly deformed by running, there is no possibility that the colored member is peeled off from the tire body.
  • a tire manufacturing method is the tire manufacturing method according to the fourth aspect, wherein the colored member is formed into a sheet shape and is temporarily attached to a mount having heat resistance than the second thermoplastic material.
  • the colored member is brought into contact with the tire body, and the mount is pressed against the tire body to weld the tire body and the colored member.
  • the tire body and the colored member are welded by bringing the colored member into contact with the tire body and pressing the mount toward the tire body.
  • the mount is peeled off and removed after the tire body and the colored member are welded.
  • the sheet-like coloring member is flexible and easily deformed, but is easy to handle because it is temporarily fixed to the mount.
  • the first thermoplastic material and the second thermoplastic material are the same kind of thermoplastic material.
  • thermoplastic material and the second thermoplastic material are made of the same kind of thermoplastic material, compared to the case where different types of thermoplastic materials are welded together, the tire body and the colored member are joined (welded). High strength.
  • a tire manufacturing method is the tire manufacturing method according to the fourth aspect or the fifth aspect, wherein the first thermoplastic material and the second thermoplastic material are the same type of heat. It is a plastic material.
  • thermoplastic material and the second thermoplastic material are made of the same kind of thermoplastic material, compared to the case where different types of thermoplastic materials are welded together, the tire body and the colored member are joined (welded). Strength can be increased.
  • a tire manufacturing method is the tire manufacturing method according to any one of the fourth aspect, the fifth aspect, and the seventh aspect, wherein in the melting step, a heated heating member is used. And heating at least one of the tire body and the colored member.
  • the melting step at least one of the tire body and the coloring member is heated by the heated heating member, and the surface of at least one of the tire body and the coloring member is softened or melted.
  • the heating member may be heated with an electric heater or the like, and at least one of the tire body and the coloring member can be heated with a simple device.
  • a tire manufacturing method is the tire manufacturing method according to the eighth aspect, wherein the heating member has an outer surface along an outer surface shape of a welding position of the coloring member.
  • the operation of the tire manufacturing method according to the ninth aspect will be described.
  • the distance between the heating member and the tire side portion is not constant, and the portion close to and far from the heating member The amount of heat received is different and the welding position cannot be heated uniformly.
  • the distance between the heating member and the welding position can be kept constant when the heating member is brought closer to the welding position.
  • the welding position can be heated uniformly, and the welding position can be uniformly softened or melted.
  • the tire according to the tenth aspect includes a tire body at least partially formed of a thermoplastic material, and a colored member formed of a material that is thermally welded to the surface of the body and includes a colorant.
  • the colored member formed of the material containing the colorant is firmly bonded to the surface of the portion formed of the thermoplastic material of the tire main body by heat welding.
  • the colored member is attached to the tire body with an adhesive, there is no risk that the colored member will be peeled off from the tire body even if the tire is repeatedly deformed by running, and the color does not drop by running. Since the colored member is thermally welded to the tire body, a colored tire can be manufactured efficiently.
  • the tire manufacturing method includes a melting step of heating or softening or melting the surface of a portion of the tire body, at least part of which is formed of a thermoplastic material, formed of the thermoplastic material. And a welding step of bringing the tire body and the colored member formed of a material containing a colorant into contact with each other to weld the tire body and the colored member.
  • the operation of the tire according to the eleventh aspect will be described.
  • the surface of the portion formed of the first thermoplastic material of the tire body, at least part of which is formed of the first thermoplastic material is heated to soften or melt the surface.
  • the tire body (softened or melted first thermoplastic material portion) and the colored member are brought into contact with each other to weld the tire body and the colored member. Thereby, the colored tire can be manufactured easily. If a plurality of different colored members are prepared, tires of various colors can be easily manufactured.
  • a colored member formed of a material containing a colorant is thermally welded to the surface of a portion formed of a thermoplastic material of the tire body. Even if the deformation is repeated, there is no possibility that the colored member is peeled off from the tire body.
  • the tire according to the first aspect has the above-described configuration, it is easy to manufacture and does not lose its color due to running.
  • the tire manufacturing method according to the second aspect a colored tire in which at least a part is formed with a colored thermoplastic material portion can be obtained efficiently.
  • the tire according to the third aspect has the above-described configuration, it is easy to manufacture and does not lose color due to running.
  • the method for manufacturing a tire according to the fourth aspect it is possible to efficiently manufacture a colored tire that does not lose color due to running.
  • the tire manufacturing method of the fifth aspect handling of the sheet-like colored member is facilitated.
  • the bonding strength between the tire body and the coloring member can be increased as compared with the case where different types of thermoplastic materials are welded together.
  • the tire manufacturing method according to the seventh aspect it is possible to efficiently manufacture a tire having high bonding strength between the tire body and the colored member.
  • the tire body and the colored member can be efficiently welded with a simple device.
  • the welding position can be heated uniformly, and the welding position can be uniformly softened or melted. Since the tire according to the tenth aspect is configured as described above, the tire is easy to manufacture and does not lose color due to running. According to the tire manufacturing method of the eleventh aspect, it is possible to efficiently manufacture a colored tire that does not lose its color due to running.
  • a tire 10 according to the present embodiment has a cross-sectional shape substantially similar to that of a conventional general rubber pneumatic tire for automobiles.
  • the tire 10 includes a bead seat portion 21 of the rim 20, a pair of bead portions 12 that contact the rim flange 22, a side portion 14 that extends outward from the bead portion 12 in the tire radial direction, and an outer side in the tire radial direction of one side portion 14.
  • the tire case 17 of the present embodiment is formed of a first thermoplastic material.
  • the tire case 17 according to the present embodiment is an annular, tire-constituting member in which one bead portion 12, one side portion 14, and a half-width crown portion 16 are integrally formed by molding or the like.
  • the tire halves 17A face each other and are joined at the tire equatorial plane, and form an air chamber with the rim.
  • the tire case 17 is not limited to one formed by joining two members.
  • the tire case 17 corresponds to a first member integrated with one bead portion 12 and the side portion 14 and a tread portion (tire outer peripheral portion).
  • Three or more members such as a second member to be combined and a third member in which the other bead portion 12 and the side portion 14 are integrated may be formed, and one pair of bead portions 12 and one pair may be formed.
  • the side part 14 and the crown part 16 may be integrally formed.
  • a reinforcing material (polymer material, metal fiber, cord, nonwoven fabric, woven fabric, etc.) is embedded in the tire case 17 (for example, the bead portion 12, the side portion 14, the crown portion 16 and the like), and the reinforcing material is provided.
  • the tire case 17 may be reinforced.
  • thermoplastic resin a thermoplastic resin, a thermoplastic elastomer (TPE), or the like can be used, but a thermoplastic elastomer should be used in consideration of elasticity required during running and moldability during manufacturing. Is preferred.
  • thermoplastic elastomer examples include an amide thermoplastic elastomer (TPA), an ester thermoplastic elastomer (TPC), an olefin thermoplastic elastomer (TPO), a styrene thermoplastic elastomer (TPS) defined in JIS K6418, Examples thereof include urethane-based thermoplastic elastomer (TPU), crosslinked thermoplastic rubber (TPV), and other thermoplastic elastomers (TPZ).
  • thermoplastic resin examples include urethane resin, olefin resin, vinyl chloride resin, polyamide resin, and the like.
  • the deflection temperature under load specified at ISO 75-2 or ASTM D648 (at the time of 0.45 MPa load) is 78 ° C or higher
  • the tensile yield strength specified by JIS K7113 is 10 MPa or higher
  • the tensile yield elongation specified by JIS K7113 is 10% or more
  • the tensile fracture elongation specified by JIS K7113 is 50% or more
  • the Vicat softening temperature (Method A) specified by JIS K7206 is 130 °. What is C or more can be used.
  • the tire half body 17A made of the first thermoplastic material can be molded through a molding process such as vacuum molding, pressure molding, injection molding, melt casting, etc., and compared with the case of molding (vulcanizing) with rubber.
  • a molding process such as vacuum molding, pressure molding, injection molding, melt casting, etc.
  • the manufacturing process can be greatly simplified and the molding time can be shortened.
  • the tire half body 17A has a bilaterally symmetric shape, that is, one tire half body 17A and the other tire half body 17A have the same shape, and therefore a mold for molding the tire half body 17A. There is an advantage that only one type is required.
  • An annular bead core 18 made of a steel cord is embedded in the bead portion 12 of the present embodiment, as is the case with conventional general pneumatic tires, but the rigidity of the bead portion 12 is ensured and fits with the rim 20. If there is no problem, the bead core 18 may be omitted.
  • the bead core 18 may be formed of a cord or material other than steel, such as an organic fiber cord.
  • an annular sealing layer made of rubber having a sealing property superior to that of the first thermoplastic resin at the contact portion of the bead portion 12 with the rim 20 and at least the portion of the rim 20 that contacts the rim flange 22. 24 is formed.
  • This sealing layer 24 may also be formed in a portion that contacts the bead sheet.
  • the rubber forming the seal layer 24 it is preferable to use the same type of rubber as that used on the outer surface of the bead portion of a conventional general rubber pneumatic tire. If the sealing property between the rim 20 can be secured only with the thermoplastic resin, the rubber seal layer 24 may be omitted, and the sealing property is superior to that of the first thermoplastic resin forming the side portion 14. These types of thermoplastic resins may be used.
  • a crown portion reinforcing layer 28 made of a steel reinforcing cord 26 wound in a spiral shape is embedded. Note that the entire reinforcing cord 26 may be embedded in the crown portion 16, or a part thereof may be embedded in the crown portion 16.
  • the crown portion reinforcing layer 28 corresponds to a belt disposed on the outer peripheral surface of the carcass of a conventional rubber pneumatic tire.
  • a tread rubber layer 30 made of rubber having higher abrasion resistance than the first thermoplastic material forming the side portion 14 is disposed on the outer peripheral side of the crown portion reinforcing layer 28.
  • the rubber used for the tread rubber layer 30 is preferably the same type of rubber as that used for conventional rubber pneumatic tires.
  • black rubber used for a general rubber pneumatic tire is used, but rubber of a color other than black may be used.
  • the first thermoplastic material forming the tire case 17 is colored with a colorant.
  • a colorant a known material used for a thermoplastic material can be used, and the first thermoplastic material colored by mixing the colorant with the material of the first thermoplastic material (not colored) is used. Can be obtained.
  • a generally known method can be used for the step of mixing the colorant into the first thermoplastic material (coloring step of the present invention.
  • Specific examples of the red colorant, the yellow colorant, the blue colorant, the green colorant, and the white colorant include, for example, urethane-based toners and colorants for elastomers. Carbon black can be raised as a specific example of the black colorant.
  • the first thermoplastic material can be colored using other colorants, and a plurality of colorants may be mixed.
  • the colorant of the present invention also includes, for example, a fluorescent material (lights when irradiated with ultraviolet rays or the like) and a night-light material (light is emitted and light emission is stopped after the light irradiation is stopped).
  • the tire case 17 is formed of the first thermoplastic material colored with the colorant, so that the color does not drop by running.
  • a colored tire can be easily manufactured by simply mixing a colorant into the first thermoplastic material. Since the tire case 17 made of a thermoplastic material is colored, the tire 10 is excellent in design.
  • the color can be changed between the one tire half 17A and the other tire half 17A.
  • various fine particles such as metal powder
  • a general synthetic resin may be mixed in the first thermoplastic material.
  • metal powder or the like By mixing metal powder or the like into the first thermoplastic material, the first thermoplastic material can be made pearly or metallic.
  • thermoplastic material by changing the type of fluorescent substance mixed in the first thermoplastic material, various colors can be emitted when irradiated with ultraviolet rays, and the appearance can be brightened.
  • fine particles such as metal powder into the first thermoplastic material, it is possible to make it look pearly or metallic.
  • any one or more of a fluorescent substance, a luminous substance, and fine particles may be mixed in the first thermoplastic material.
  • the colored sheet 32 is formed of a second thermoplastic material colored with a colorant.
  • the second thermoplastic material used for the colored sheet 32 the same material as the first thermoplastic material used for the tire case 17 can be used.
  • the second thermoplastic material used for the colored sheet 32 is preferably the same type of thermoplastic material as the first thermoplastic material used for the tire case 17, but may be a different type of thermoplastic material.
  • the colorant for coloring the second thermoplastic material of the colored sheet 32 the same colorant as that for coloring the first thermoplastic material of the tire case 17 can be used.
  • the color 32 of the colored sheet of the present embodiment is different from the color of the tire case 17 but may be the same.
  • the shape of the coloring sheet 32 is not limited to that shown in FIGS. 2 and 3 and may be other shapes such as characters, marks, pictures, symbols, and the like.
  • the colored sheet 32 is temporarily fixed to the mount 34 in advance.
  • An adhesive or the like is applied to the mount 34, and the colored sheet 32 is temporarily fixed by the adhesive or the like.
  • a sheet-like member having higher heat resistance than the colored sheet 32 for example, paper or cloth that does not soften or melt even at the melting temperature of the second thermoplastic material of the colored sheet 32, a synthetic resin sheet, or the like is used. Yes.
  • At least one of the colored sheet welding scheduled portion of the tire case 17 and the colored sheet 32 is heated by, for example, a flat heating member 36 formed of a metal plate or the like heated by an internal electric heater or the like. Softened (to the extent that it can be welded) or melted (melting step), the colored sheet 32 is brought into contact with the site to be welded of the tire case 17, and the mount 34 is pressed against the tire case 17 by the pressing member 42, The mount 34 is pressed against the tire case 17 while rolling a pressing roller (not shown), and the colored sheet 32 and the tire case 17 are welded (welding step).
  • the heating member 36 only needs to be able to soften or melt the portion to be welded, and does not have to be in contact with the partner to be heated.
  • an attachment region 40 for attaching the colored sheet 32 can be provided on the side portion 14 of the tire 10.
  • the affixing region 40 of the present embodiment has a frame shape that is slightly convex, but may have other configurations.
  • the pasting area 40 has no influence on the tire notation (for example, the tire size formed by making the surface uneven, the manufacturer name, the mark indicating the rotation direction, the product name, the notation prescribed by the law, etc.). It is preferable to provide in a part.
  • the welding part is previously washed with a solvent such as alcohol.
  • the welded portion may be buffed in advance.
  • the welded portion is subjected to natural air cooling or forced air cooling with a fan or the like, and the temperature of the welded portion is lowered and the first and second thermoplastic materials are completely solidified. Remove. Thus, the tire 10 to which the colored sheet 32 is welded is completed.
  • the colored sheet 32 formed of the second thermoplastic material containing the colorant is thermally welded to the surface of the tire case 17, even if the tire 10 is repeatedly deformed by running. There is no possibility that the colored sheet 32 is peeled off from the tire case 17.
  • the shape of the coloring sheet 32 may be an annular shape matching the size of the tire side portion (the bead portion 12 and the side portion 14), and this may be welded to the tire side portion. Thereby, the color of a tire side part can be changed easily. If the colored sheets 32 of various colors are prepared, the color of the tire 10 can be easily changed, it is not necessary to stock a plurality of types of tires 10 having different colors, the inventory space can be reduced, and inventory management is performed. It will also be easy.
  • the colored sheet 32 can be easily applied to the manufactured tire 10 later, so that, for example, the steps (2) to (4) are performed at a store or the like.
  • the appearance design of the tire 10 can be easily improved or changed by changing the tire 10 to various colors at a store or by attaching various marks, letters, etc. by heat welding. it can. That is, if the method of this embodiment is used, for example, the user selects a colored sheet 32 having a desired design from a large number of patterns and colors at the store of a tire store, and the colored sheet is placed at a user's favorite position. Can be welded.
  • the welded portions of the tire case 17 and the colored sheet 32 can have higher bonding strength when melted than when softened. Furthermore, higher bonding strength can be obtained when both the tire case 17 and the colored sheet 32 are heated and softened or melted than when only one of them is softened or melted.
  • the first thermoplastic material of the tire case 17 and the first thermoplastic material of the colored sheet 32 are interposed between the first thermoplastic material of the tire case 17 and the thermoplastic material of the colored sheet 32.
  • a mixed layer in which the thermoplastic material 2 is mixed is provided, which is preferable for increasing the bonding strength.
  • the tire case 17 and the heating are performed using the flat heating member 36.
  • the heating member 36 that is curved in a shape along the curve of the side portion 14 can also be used.
  • the distance between the heating member 36 and the side portion 14 can be made constant, and the side portion 14 can be heated uniformly, and the surface can be uniformly softened or melted.
  • the tire case 17 and the colored sheet 32 are softened or melted using the heating member 36.
  • the tire case 17 and the colored sheet 32 are softened or melted by applying hot air, an infrared lamp, a laser beam, or the like.
  • the means for heating the first and second thermoplastic materials is not particularly limited.
  • the rubber tread rubber layer 30 is provided on the outer periphery of the tire case 17 made of the first thermoplastic material.
  • the tread rubber layer 30 may be the first thermoplastic material or other It is good also as a tread layer which consists of a kind of thermoplastic material.
  • the thermoplastic material of the tread layer can be colored with a colorant similarly to the tire case 17, and the tread layer made of the thermoplastic material and the tire case 17 may be the same color or different colors. May be.
  • the tire case 17 of this embodiment was formed by joining two tire halves 17A
  • the tire case 17 may be composed of three or more members made of a thermoplastic material, and the color is changed for each member. Alternatively, all the members may be the same color.
  • the first thermoplastic material and the second thermoplastic material may be different types of thermoplastic materials in the case of the same type of thermoplastic material, the melting point of the first thermoplastic material and the second thermoplastic material The melting points may be the same or different, but it is sufficient that either one can be melted.
  • the colored sheet 32 may have a single-layer structure made of a single material, or may have a multi-layer structure made of different materials. When the colored sheet 32 has a multi-layer structure made of different materials, the layer to be welded to the tire case 17 is preferably formed of a thermoplastic material.
  • the tire case 17 is formed of the first thermoplastic material and the tread portion is formed of rubber, but the tread portion is formed of a material other than rubber such as a thermoplastic material.
  • the entire tire may be formed of a thermoplastic material.
  • the tire case 17 is formed of the first thermoplastic material
  • the colored sheet 32 is formed of the second thermoplastic material
  • both are formed of the thermoplastic material. 17 and the colored sheet 32 can be welded and any one of them can be a material other than a thermoplastic material (for example, a thermosetting material having flexibility (thermosetting). Resin) etc.).
  • a thermoplastic material for example, a thermosetting material having flexibility (thermosetting). Resin) etc.
  • the tire 10 of the above embodiment is a so-called pneumatic tire
  • the present invention can be applied even to a tire (solid tire) that does not allow air to enter.
  • this invention is applicable not only for passenger cars but other tires, such as a two-wheeled vehicle.
  • one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.
  • Tire (tire, tire body) 17 Tire case (tire frame member, thermoplastic material, first thermoplastic material) 32 Colored sheet (colored member, second thermoplastic material) 34 Mount 36 Heating member

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Abstract

　走行によって色が落ちることのないタイヤを簡単に製造する。　タイヤ１０の骨格部材であるタイヤケース１７を、着色剤を含んで色が付けられた第１の熱可塑性材料でインジェクション成形する。走行によって色が落ちることのないタイヤを簡単に製造できる。

Description

タイヤ、及びタイヤの製造方法
　本発明は、リムに装着するタイヤ、及びタイヤの製造方法にかかり、特には、少なくとも一部が熱可塑性材料で形成されたタイヤ、及びタイヤの製造方法に関する。
　従来、乗用車等の車両には、ゴム、有機繊維材料、スチール部材等から構成された空気入りタイヤが用いられている。
　しかしながら、使用後のゴムはリサイクルの用途に制限があり、焼却してサーマルリサイクルする、破砕して道路の舗装材料として用いる等して処分することが行われていた。
　近年では、軽量化やリサイクルのし易さから、熱可塑性樹脂、熱可塑性エラストマー等をタイヤ材料として用いることが求められている。
　例えば、特許文献１には、熱可塑性の高分子材料を用いて成形された空気入りタイヤが開示されている。
　熱可塑性の高分子材料を用いたタイヤは、ゴム製の従来タイヤ対比で製造が容易で、低コストである。
特開０３－１４３７０１号公報
　従来のゴム製の空気入りタイヤでは、サイドゴムは、カーボンブラックを含んだ黒いゴムが殆どであった。
　このゴム製の空気入りタイヤに対して、意匠や色彩パターンを提供する方法が種々提案されている。
　黒色のゴム製の空気入りタイヤをカラー化するためにタイヤ成形時に色ゴムを積層する方法があるが、工程が複雑で製造が難しくなる問題がある。また、この方法では、製造時に色が決定されてしまうため、選択肢を多数用意することが難しかった。
　タイヤ成形時にシート等を挿入し、モールドで加硫することが考えられるが、この場合には、加硫成形時にシートが傾いたり、シートの存在によってゴムの流動に影響が出てゴムの入り具合が難しい面がある。
　また、加硫後のタイヤに接着剤等を用いてシールを貼り付けることも考えられるが、タイヤ転動に伴う屈曲によりシールが剥がれてしまう問題がある。
　このように、ゴム製の空気入りタイヤにおいては、サイド部をカラー化する手法が種々あるが、各々問題を有していた。
　ところで、熱可塑性材料を用いて構成された空気入りタイヤでは、タイヤを構成する材料が全く異なるため、ゴム製の空気入りタイヤをカラー化する手法を用いることが出来ず、接着剤で張られたシートが走行によって剥がれる、即ち、色が落ちる問題も依然として解決されない。
　本発明は、上記問題を解決すべく成されたもので、熱可塑性樹脂を用いたタイヤにおいて、走行によって色が落ちることのない簡単に製造できるタイヤ、及びタイヤの製造方法を提供することが目的である。
　第１の態様に係るタイヤは、着色剤を含んだ熱可塑性材料で少なくとも一部が成形されている。
　次に、第１の態様に係るタイヤの作用を説明する。
　熱可塑性材料の素材自体は、通常透明または半透明であるが、第１の態様に係るタイヤでは、熱可塑性材料に着色剤で色が付けられている。
　第１の態様に係るタイヤは、熱可塑性材料が着色剤で着色されているので、走行によって色が落ちることが無い。
　また、熱可塑性材料に着色剤を混ぜるだけで色付きの熱可塑性材料とすることができるため、色付きのタイヤを簡単に製造できる。
　第２の態様に係るタイヤの製造方法は、熱可塑性材料に着色剤を付与する着色工程と、前記着色剤の含まれた前記熱可塑性材料を用いてタイヤの少なくとも一部を成形する成形工程と、を有する。
　次に、第２の態様に係るタイヤの製造方法の作用を説明する。
　先ず、着色工程では、熱可塑性材料に着色剤を付与する。
　成形工程では、着色剤の含まれた前記熱可塑性材料を用いてタイヤの少なくとも一部を成形する。
　これによって、着色された熱可塑性材料部分で少なくとも一部が形成された色付きのタイヤを効率的に製造できる。
　第３の態様に係るタイヤは、少なくとも一部が第１の熱可塑性材料で形成されたタイヤ本体と、前記タイヤ本体の前記第１の熱可塑性材料で形成された部分の表面に熱溶着され、着色剤を含む第２の熱可塑性材料で形成された着色部材と、を有する。
　次に、第３の態様に係るタイヤの作用を説明する。
　第３の態様に係るタイヤでは、タイヤ本体の第１の熱可塑性材料で形成された部分の表面に、着色剤を含む第２の熱可塑性材料で形成された着色部材が熱溶着によって強固に接合されているので、シート状の着色部材を接着剤でタイヤ本体に貼り付けた従来技術のタイヤの様に、走行によって変形を繰り返しても着色部材がタイヤ本体から剥がれる虞がなく、走行によって色が落ちることがない。
　着色部材をタイヤ本体に熱溶着させるので、色付きのタイヤを効率的に製造できる。
　第４の態様に係るタイヤの製造方法は、少なくとも一部が第１の熱可塑性材料で形成されたタイヤ本体の前記第１の熱可塑性材料で形成された部分の表面、及び着色剤を含む第２の熱可塑性材料で形成された着色部材の少なくとも一方を加熱し、前記タイヤ本体の前記表面、及び前記着色部材の表面の少なくとも一方を軟化または溶融させる溶融工程と、前記タイヤ本体と前記着色部材とを接触させて前記タイヤ本体に前記着色部材を溶着させる溶着工程と、を有する。
　次に、第４の態様に係るタイヤの製造方法の作用を説明する。
　先ず、溶融工程では、少なくとも一部が第１の熱可塑性材料で形成されたタイヤ本体の第１の熱可塑性材料で形成された部分の表面、及び着色剤を含む第２の熱可塑性材料で形成された着色部材の少なくとも一方を加熱し、タイヤ本体の第１の熱可塑性材料で形成された部分の表面、及び着色部材の表面の少なくとも一方を軟化または溶融させる。
　溶着工程では、タイヤ本体と着色部材とを接触させてタイヤ本体と着色部材と溶着させる。
　これにより、着色されたタイヤを簡単に製造することができる。なお、複数の異なる色の着色部材を用意しておけば、種々の色のタイヤを容易に製造できる。
　また、このようにして製造されたタイヤは、タイヤ本体の第１の熱可塑性材料で形成された部分の表面に、着色剤を含む第２の熱可塑性材料で形成された着色部材が熱溶着されているので、タイヤが走行によって変形を繰り返しても、着色部材がタイヤ本体から剥がれる虞がない。
　第５の態様に係るタイヤの製造方法は、第４の態様に係るタイヤの製造方法において、前記着色部材はシート状とされ、かつ前記第２の熱可塑性材料よりも耐熱性を有する台紙に仮止めされており、前記溶着工程では、前記着色部材を前記タイヤ本体に接触させ、前記台紙を前記タイヤ本体に向けて押圧することで前記タイヤ本体と前記着色部材と溶着させる。
　次に、第５の態様に係るタイヤの製造方法の作用を説明する。
　溶着工程では、着色部材をタイヤ本体に接触させ、台紙をタイヤ本体に向けて押圧することでタイヤ本体と着色部材とが溶着する。なお、台紙は、タイヤ本体と着色部材とが溶着した後、剥がして除去する。
　シート状の着色部材は柔軟で変形し易いが、台紙に仮止めされているので、取り扱いが容易となる。
　第６の態様に係るタイヤは、第１の態様または第３の態様に係るタイヤにおいて、前記第１の熱可塑性材料と前記第２の熱可塑性材料とは、同種の熱可塑性材料である。
　次に、第６の態様に係るタイヤの作用を説明する。
　第１の熱可塑性材料と第２の熱可塑性材料とを同種の熱可塑性材料としているので、異種の熱可塑性材料同士を溶着する場合に比較して、タイヤ本体と着色部材との接合（溶着）強度が高い。
　第７の態様に係るタイヤの製造方法は、第４の態様または第５の態様に係るタイヤの製造方法において、前記第１の熱可塑性材料と前記第２の熱可塑性材料とは、同種の熱可塑性材料である。
　次に、第７の態様に係るタイヤの製造方法の作用を説明する。
　第１の熱可塑性材料と第２の熱可塑性材料とを同種の熱可塑性材料としているので、異種の熱可塑性材料同士を溶着する場合に比較して、タイヤ本体と着色部材との接合（溶着）強度を高くすることが出来る。
　第８の態様に係るタイヤの製造方法は、第４の態様、第５の態様、及び第７の態様の何れか１つに記載のタイヤの製造方法において、前記溶融工程では、加熱した加熱部材で前記タイヤ本体、及び前記着色部材の少なくとも一方を加熱する。
　次に、第８の態様に係るタイヤの製造方法の作用を説明する。
　溶融工程では、加熱された加熱部材で、タイヤ本体、及び着色部材の少なくとも一方が加熱され、タイヤ本体、及び着色部材の少なくとも一方の表面が軟化または溶融される。
　加熱部材は、電気ヒーター等で加熱すればよく、簡単な装置でもってタイヤ本体、及び着色部材の少なくとも一方を加熱することが出来る。
　第９の態様に係るタイヤの製造方法は、第８の態様に係るタイヤの製造方法において、前記加熱部材は、前記着色部材の溶着位置の外表面形状に沿った外表面を備えている。
　次に、第９の態様に係るタイヤの製造方法の作用を説明する。
　例えば、タイヤサイド部は湾曲しているので、平坦な加熱部材をタイヤサイド部に接近させると、加熱部材とタイヤサイド部との間隔が一定とならず、加熱部材に近い部分と遠い部分とでは受ける熱量が異なり、溶着位置を均一に加熱することが出来なくなる。
　加熱部材の外表面を着色部材の溶着位置の外表面形状に沿った形状とすることで、加熱部材を溶着位置に接近させた際に、加熱部材と溶着位置との間隔を一定に保つことができ、溶着位置を均一に加熱でき、溶着位置を均一に軟化または溶融させることができる。
　第１０の態様に係るタイヤは、少なくとも一部が熱可塑性材料で形成されたタイヤ本体と、前記本体の表面に熱溶着され、着色剤を含む材料で形成された着色部材と、を有する。
　次に、第１０の態様に係るタイヤの作用を説明する。
　第１０の態様に係るタイヤでは、タイヤ本体の熱可塑性材料で形成された部分の表面に、着色剤を含む材料で形成された着色部材が熱溶着によって強固に接合されているので、シート状の着色部材を接着剤でタイヤ本体に貼り付けた従来技術のタイヤの様に、走行によって変形を繰り返しても着色部材がタイヤ本体から剥がれる虞がなく、走行によって色が落ちることがない。
　着色部材をタイヤ本体に熱溶着させるので、色付きのタイヤを効率的に製造できる。
　第１１の態様に係るタイヤの製造方法は、　少なくとも一部が熱可塑性材料で形成されたタイヤ本体の前記熱可塑性材料で形成された部分の表面を加熱し、前記表面を軟化または溶融させる溶融工程と、前記タイヤ本体と着色剤を含む材料で形成された前記着色部材とを接触させて前記タイヤ本体と前記着色部材と溶着させる溶着工程と、を有する。
　次に、第１１の態様に係るタイヤの作用を説明する。
　先ず、溶融工程では、少なくとも一部が第１の熱可塑性材料で形成されたタイヤ本体の第１の熱可塑性材料で形成された部分の表面を加熱し、表面を軟化または溶融させる。
　溶着工程では、タイヤ本体（軟化または溶融された第１の熱可塑性材料部分）と着色部材とを接触させてタイヤ本体と着色部材と溶着させる。
　これにより、着色されたタイヤを簡単に製造することができる。なお、複数の異なる色の着色部材を用意しておけば、種々の色のタイヤを容易に製造できる。
　また、このようにして製造されたタイヤは、タイヤ本体の熱可塑性材料で形成された部分の表面に、着色剤を含む材料で形成された着色部材が熱溶着されているので、タイヤが走行によって変形を繰り返しても、着色部材がタイヤ本体から剥がれる虞がない。
　以上説明したように第１の態様に係るタイヤは上記の構成としたので、製造が簡単で、走行によって色が落ちない。
　第２の態様に係るタイヤの製造方法によれば、着色された熱可塑性材料部分で少なくとも一部が形成された色付きのタイヤが効率的に得られる。
　第３の態様に係るタイヤは上記の構成としたので、製造が簡単で、走行によって色が落ちない。
　第４の態様に係るタイヤの製造方法によれば、走行により色が落ちない色付きタイヤを効率的に製造することができる。
　第５の態様に係るタイヤの製造方法によれば、シート状の着色部材の取り扱いが容易となる。
　第６の態様に係るタイヤは上記の構成としたので、　異種の熱可塑性材料同士を溶着する場合に比較して、タイヤ本体と着色部材との接合強度を高くすることが出来る。
　第７の態様に係るタイヤの製造方法によれば、タイヤ本体と着色部材との接合強度が高いタイヤを効率的に製造することが出来る。
　第８の態様に係るタイヤの製造方法によれば、簡単な装置でタイヤ本体と着色部材とを効率的に溶着することが出来る。
　第９の態様に係るタイヤの製造方法によれば、溶着位置を均一に加熱でき、溶着位置を均一に軟化または溶融させることができる。
　第１０の態様に係るタイヤは上記の構成としたので、製造が簡単で、走行によって色が落ちない。
　第１１の態様に係るタイヤの製造方法によれば、走行により色が落ちない色付きタイヤを効率的に製造することができる。
本発明の一実施形態に係るタイヤの一部を断面にした斜視図である。 リムに装着したビード部の断面図である。 第２の実施形態に係るタイヤの一部を断面にした斜視図である。 台紙に仮止めされた着色シートの一例を示す平面図である。 溶着工程を示す説明図である。 第２の実施形態に係るタイヤ（着色シート溶着前）の側面図である。 他の実施形態に係る加加熱部材の側面図である。
［第１の実施形態］
　以下に、図面にしたがって本発明のタイヤの第１の実施形態を説明する。
　図１Ａ，Ｂに示すように、本実施形態のタイヤ１０は、自動車用の従来一般のゴム製の空気入りタイヤと略同様の断面形状を呈している。
　タイヤ１０は、リム２０のビードシート部２１、及びリムフランジ２２に接触する１対のビード部１２、ビード部１２からタイヤ径方向外側に延びるサイド部１４、一方のサイド部１４のタイヤ径方向外側端と他方のサイド部１４のタイヤ径方向外側端とを連結するクラウン部１６からなるタイヤケース（タイヤ骨格部材）１７を備えている。
　本実施形態のタイヤケース１７は、第１の熱可塑性材料で形成されている。
　本実施形態のタイヤケース１７は、一つのビード部１２、一つのサイド部１４、及び半幅のクラウン部１６が一体としてモールド等で成形された同一形状とされた円環状の、タイヤ構成部材としてのタイヤ半体１７Ａを互いに向かい合わせてタイヤ赤道面部分で接合することで形成されており、リムとの間で空気室を形成する。なお、タイヤケース１７は、２つの部材を接合して形成するものに限らず、例えば、一方のビード部１２とサイド部１４と一体とした第１の部材、トレッド部（タイヤ外周部）に対応する第２の部材、及び他方のビード部１２とサイド部１４とを一体とした第３の部材等、３以上の部材を接合して形成しても良く、１対のビード部１２、１対のサイド部１４、及びクラウン部１６を一体で成形したものであっても良い。
　また、タイヤケース１７（例えば、ビード部１２、サイド部１４、クラウン部１６等）に、補強材（高分子材料や金属製の繊維、コード、不織布、織布等）を埋設配置し、補強材でタイヤケース１７を補強しても良い。
　第１の熱可塑性材料としては、熱可塑性樹脂、熱可塑性エラストマー（ＴＰＥ）等を用いることができるが、走行時に必要とされる弾性と製造時の成形性等を考慮すると熱可塑性エラストマーを用いることが好ましい。
　熱可塑性エラストマーとしては、例えば、ＪＩＳ　Ｋ６４１８に規定されるアミド系熱可塑性エラストマー（ＴＰＡ）、エステル系熱可塑性エラストマー（ＴＰＣ）、オレフィン系熱可塑性エラストマー（ＴＰＯ）、スチレン系熱可塑性エラストマー（ＴＰＳ）、ウレタン系熱可塑性エラストマー（ＴＰＵ）、熱可塑性ゴム架橋体（ＴＰＶ）、若しくはその他の熱可塑性エラストマー（ＴＰＺ）等が挙げられる。
　また、熱可塑性樹脂としては、例えば、ウレタン樹脂、オレフィン樹脂、塩化ビニル樹脂、ポリアミド樹脂等が上げられる。
　これらの熱可塑性材料としては、たとえば、ＩＳＯ７５－２又はＡＳＴＭ　Ｄ６４８に規定される荷重たわみ温度（０．４５ＭＰａ荷重時）が７８°Ｃ以上、ＪＩＳ　Ｋ７１１３に規定される引張降伏強さが１０ＭＰａ以上、同じくＪＩＳ　Ｋ７１１３に規定される引張降伏伸びが１０％以上、同じくＪＩＳ　Ｋ７１１３に規定される引張破壊伸び（ＪＩＳ　Ｋ７１１３）が５０％以上、ＪＩＳ　Ｋ７２０６に規定されるビカット軟化温度（Ａ法）が１３０°Ｃ以上であるものを用いることができる。
　第１の熱可塑性材料からなるタイヤ半体１７Ａは、例えば、真空成形、圧空成形、インジェクション成形、メルトキャスティング等の成形工程を経て成形することができ、ゴムで成形（加硫）する場合に比較して、製造工程を大幅に簡略化でき、成形時間も短くて済む。
　また、本実施形態では、タイヤ半体１７Ａは左右対称形状、即ち、一方のタイヤ半体１７Ａと他方のタイヤ半体１７Ａとが同一形状とされているので、タイヤ半体１７Ａを成形する金型が１種類で済むメリットがある。
　本実施形態のビード部１２には、従来一般の空気入りタイヤと同様の、スチールコードからなる円環状のビードコア１８が埋設されているが、ビード部１２の剛性が確保され、リム２０との嵌合に問題なければビードコア１８は省略しても良い。なお、ビードコア１８は、有機繊維コード等、スチール以外のコードや材料で形成されていても良い。
　本実施形態では、ビード部１２のリム２０との接触部分、少なくともリム２０のリムフランジ２２と接触する部分に、第１の熱可塑性樹脂よりもシール性に優れたゴムからなる円環状のシール層２４が形成されている。このシール層２４はビードシートと接触する部分にも形成されていても良い。シール層２４を形成するゴムとしては、従来一般のゴム製の空気入りタイヤのビード部外面に用いられているゴムと同種のゴムを用いることが好ましい。熱可塑性樹脂のみでリム２０との間のシール性が確保できれば、ゴムのシール層２４は省略しても良く、サイド部１４を形成している第１の熱可塑性樹脂よりもシール性に優れる他の種類の熱可塑性樹脂を用いても良い。
　クラウン部１６には、螺旋状に巻回されたスチールの補強コード２６からなるクラウン部補強層２８が埋設されている。なお、補強コード２６は、全体がクラウン部１６に埋設されていても良く、一部分がクラウン部１６に埋設されていても良い。このクラウン部補強層２８は、従来のゴム製の空気入りタイヤのカーカスの外周面に配置されるベルトに相当するものである。
　クラウン部補強層２８の外周側には、サイド部１４を形成している第１の熱可塑性材料よりも耐摩耗性に優れたゴムからなるトレッドゴム層３０が配置されている。トレッドゴム層３０に用いるゴムは、従来のゴム製の空気入りタイヤに用いられているゴムと同種のゴムを用いることが好ましい。なお、サイド部１４を形成している第１の熱可塑性材料よりも耐摩耗性に優れる他の種類の熱可塑性材料からなるトレッド層を外周部に設けても良い。
　本実施形態のトレッドゴム層３０には、一般のゴム製空気入りタイヤに用いる黒色のゴムを用いているが、黒色以外の色のゴムを用いても良い。
　本実施形態のタイヤ１０では、タイヤケース１７を形成する第１の熱可塑性材料が、着色剤で着色されている。着色剤としては、熱可塑性材料に用いる公知のものを用いることができ、第１の熱可塑性材料の素材（着色されていない）に着色剤を混ぜることで着色された第１の熱可塑性材料を得ることが出来る。第１の熱可塑性材料に着色剤を混ぜる工程（本発明の着色工程）は、一般的に知られている公知の方法を用いることが出来る。
　なお、赤色の着色剤、黄色の着色剤、青色の着色剤、緑色の着色剤、及び白色の着色剤の具体例としては、例えば、ウレタン系トナーやエラストマー用の着色剤を上げることができ、黒色の着色剤の具体例としては、カーボンブラックを上げることができる。
　なお、その他の色の着色剤を用いて第１の熱可塑性材料を着色できることは勿論のこと、複数の着色剤を混ぜても良いのは勿論である。
　また、上記具体例の、例えば、蛍光物質（紫外線等の照射によって光る）、夜光物質（光を照射し、光の照射を停止した後に発光する）も本発明の着色剤に含まれる。
（作用）
　次に、本実施形態のタイヤ１０の作用を説明する。
　本実施形態のタイヤ１０は、タイヤケース１７が、着色剤で着色された第１の熱可塑性材料で形成されているため、走行によって色が落ちることが無い。また、第１の熱可塑性材料に着色剤を混ぜるだけで、色の付いたタイヤを簡単に製造することができる。
　熱可塑性材料からなるタイヤケース１７に色が付いているので、タイヤ１０は、意匠性に優れたものとなる。
　なお、本実施形態では、２つのタイヤ半体１７Ａを接合してタイヤケース１７を形成しているので、一方のタイヤ半体１７Ａと他方のタイヤ半体１７Ａとで色を変えることもできる。
　また、着色剤の他に、一般の合成樹脂に混入される種々の微粒子（金属粉等）等を第１の熱可塑性材料に混ぜても良い。第１の熱可塑性材料に金属粉等を混入させることで、第１の熱可塑性材料をパール調やメタリック調にすることも可能である。
　また、第１の熱可塑性材料に混入する蛍光物質の種類を変えることで、紫外線を照射した際に、種々の色に発光させることができ、また、見た目を鮮やかにすることができる。
　第１の熱可塑性材料に金属粉等の微粒子を混入することで、見た目をパール調やメタリック調にすることが可能である。
　また、着色剤に加え、蛍光物質、夜光物質、微粒子の何れか１以上を第１の熱可塑性材料に混入しても良いのは勿論である。
［第２の実施形態］
　次に、本発明のタイヤの第２の実施形態を説明する。なお、第１の実施形態と同一構成には同一符号を付し、その説明は省略する。
　図２に示すように、本実施形態のタイヤ１０では、タイヤケース１７の側面に、着色された着色シート３２が溶着されている。なお、本発明のタイヤ本体は、着色シート３２が溶着されていないタイヤ１０を意味する。
　着色シート３２は、着色剤で着色された第２の熱可塑性材料で形成されている。
　着色シート３２に用いる第２の熱可塑性材料としては、タイヤケース１７に用いる第１の熱可塑性材料と同様のものを用いることができる。なお、着色シート３２に用いる第２の熱可塑性材料は、タイヤケース１７に用いる第１の熱可塑性材料と同種の熱可塑性材料が好ましいが、異種の熱可塑性材料でも良い。
　着色シート３２の第２の熱可塑性材料を着色する着色剤は、タイヤケース１７の第１の熱可塑性材料を着色する着色剤と同様のものを用いることができる。
　本実施形態の着色シート３２色は、タイヤケース１７の色と異なっているが、同じであっても良い。着色シート３２の形状は、図２、図３に示すものに限らず、文字、マーク、絵柄、記号等、他の形状のものであって良い。
　次に、タイヤ１０のタイヤケース１７に、着色シート３２を溶着する方法を説明する。
（１）　図３に示すように、着色シート３２は、予め台紙３４に仮止めしておく。台紙３４には、粘着剤等が塗布されており、その粘着剤等によって着色シート３２が仮止めされている。台紙３４は、着色シート３２よりも耐熱性に優れたシート状部材、例えば、着色シート３２の第２の熱可塑性材料の融点温度でも軟化や溶融しない紙や布、合成樹脂シート等が用いられている。
（２）　タイヤケース１７の着色シート溶着予定部位、及び着色シート３２の少なくとも一方を、例えば、内臓された電気ヒーター等で加熱された金属板等で形成された平板状の加熱部材３６で加熱して軟化（溶着できる程度に）または溶融させ（溶融工程）、着色シート３２をタイヤケース１７の溶着予定部位に向けて接触させ、台紙３４を押圧部材４２でタイヤケース１７に向けて押圧したり、押圧ローラ（図示せず）を転がしながら台紙３４をタイヤケース１７に向けて押圧し、着色シート３２とタイヤケース１７とを溶着する（溶着工程）。
　なお、加熱部材３６は、溶着予定部位を軟化または溶融できれば良く、加熱する相手に接触させなくても良い。
　なお、着色シート３２を位置決めし易いように、例えば図５に示すように、タイヤ１０のサイド部１４に、着色シート３２を貼り付けるための貼り付け領域４０を設けることが出来る。本実施形態の貼り付け領域４０は、微小に凸とされた枠形状であるが、他の構成であっても良い。
　なお、貼り付け領域４０は、タイヤ表記（例えば、表面を凹凸させることで形成されているタイヤサイズ、メーカー名、回転方向を示すマーク、商品名、法で定められた表記等）に影響の無い部分に設けることが好ましい。
　なお、溶着前のタイヤケース１７、及び着色シート３２において、溶着部位は、予めアルコール等の溶剤で洗浄しておくことが好ましい。また、溶着し易い様に、溶着部位にコロナ処理や紫外線処理等を行っても良い。さらに、タイヤケース１７においては、溶着部位を予めバフ研磨しても良い。
（３）　溶着後、溶着部分を自然空冷、又はファン等による強制空冷を行い、溶着部分の温度が低下して第１，２の熱可塑性材料が完全に固化した後、タイヤケース表面から台紙３４を剥がす。以上により、着色シート３２が溶着されたタイヤ１０が完成する。
(作用）
　本実施形態のタイヤ１０では、タイヤケース１７の表面に、着色剤を含む第２の熱可塑性材料で形成された着色シート３２が熱溶着されているので、タイヤ１０が走行によって変形を繰り返しても、着色シート３２がタイヤケース１７から剥がれる虞がない。
　なお、着色シート３２の形状をタイヤ側部（ビード部１２、サイド部１４）の大きさに合わせた円環状とし、これをタイヤ側部に溶着しても良い。これにより、タイヤ側部の色を簡単に変えることが出来る。種々の色の着色シート３２を用意しておけば、タイヤ１０の色を容易に変更でき、色の異なる複数種類のタイヤ１０を在庫しておく必要が無く、在庫スペースが少なくて済み、在庫管理も簡単になる。
　本実施形態の方法では、製造されたタイヤ１０に対して、後から簡単に色の付いた着色シート３２を付与することができるので、例えば、上記工程（２）～（４）を販売店等において行うことができ、販売店等においてタイヤ１０を種々の色に変更したり、種々のマーク、文字等を熱溶着によって貼り付けることで、タイヤ１０の外観意匠を簡単に向上乃至変更することができる。
　即ち、本実施形態の方法を用いれば、例えば、タイヤ販売店の店頭にてユーザーに多数の模様、色彩の中から好みのデザインの着色シート３２を選んでもらい、ユーザーの好みの位置に着色シートを溶着することができる。
　なお、タイヤケース１７及び着色シート３２の溶着部位は、軟化させるよりも、溶融させた方が高い接合強度が得られる。さらに、タイヤケース１７と着色シート３２の両方を加熱して軟化乃至溶融させた方が、何れか一方のみを軟化乃至溶融するよりも高い接合強度が得られる。
　溶融した熱可塑性材料同士を付着させると、タイヤケース１７の第１の熱可塑性材料と着色シート３２の熱可塑性材料との間に、タイヤケース１７の第１の熱可塑性材料と着色シート３２の第２の熱可塑性材料とが混ざり合った混合層が設けられ、接合強度を高める上で好ましい。
　上記実施形態では、平板状の加熱部材３６を用いてタイヤケース１７や加熱したが、図６に示すように、サイド部１４のカーブに沿った形状に湾曲された加熱部材３６を用いることも出来る。
　この加熱部材３６を用いることで、加熱部材３６とサイド部１４との間隔を一定にでき、サイド部１４を均一に加熱し、表面を均一に軟化、または溶融させることが可能となる。
　上記実施形態では、加熱部材３６を用いてタイヤケース１７や着色シート３２を軟化または溶融させたが、熱風、赤外線ランプ、レーザビーム等を当てるこによりタイヤケース１７や着色シート３２を軟化または溶融させても良く、第１，２の熱可塑性材料を加熱する手段は特に問わない。
　上記実施形態のタイヤ１０では、第１の熱可塑性材料からなるタイヤケース１７の外周にゴム製のトレッドゴム層３０が設けられているが、トレッドゴム層３０を第１の熱可塑性材料または、他の種類の熱可塑性材料からなるトレッド層としても良い。なお、トレッド層の熱可塑性材料は、タイヤケース１７と同様に、着色剤で着色することが出来、熱可塑性材料からなるトレッド層と、タイヤケース１７は、同じ色にしても良く、異なる色にしても良い。
　なお、本実施形態のタイヤケース１７は、２つのタイヤ半体１７Ａを接合して形成したが、熱可塑性材料からなる３つ以上の部材から構成されていても良く、部材毎に色を変えても良く、すべての部材を同じ色にしても良い。
　第１の熱可塑性材料と第２の熱可塑性材料とは、同種の熱可塑性材料の場合、異種の熱可塑性材料の場合もあるので、第１の熱可塑性材料の融点と第２の熱可塑性材料の融点は、同じである場合や異なる場合もあるが、何れか一方を溶融できれば良い。
　着色シート３２は、単一の材料からなる１層構造であっても良く、材料の異なる複数層構造であっても良い。着色シート３２が材料の異なる複数層構造の場合、タイヤケース１７に溶着する側の層は、熱可塑性材料で形成されていることが好ましい。
　上記実施形態のタイヤ１０は、タイヤケース１７が第１の熱可塑性材料で形成され、トレッド部がゴムで形成されていたが、トレッド部が熱可塑性材料等、ゴム以外の材料で形成されていても良く、タイヤ全体が熱可塑性材料で形成されていても良い。
　上記第２の実施形態では、タイヤケース１７が第１の熱可塑性材料で形成され、着色シート３２が第２の熱可塑性材料で形成され、両者が熱可塑性材料で形成されていたが、タイヤケース１７と着色シート３２が溶着でき、走行によって剥がれないような接合強度が得られるのであれば、何れか一方は、熱可塑性材料以外の材料（例えば、柔軟性を有する熱硬化性材料（熱硬化性樹脂）等）で形成されていても良い。
　上記実施形態のタイヤ１０は、所謂空気入りタイヤであったが、空気を入れないタイヤ（中実タイヤ）であっても本発明は適用できる。また、本発明は、乗用車用に限らず、２輪車等の他のタイヤにも適用できる。
　以上、本発明の一実施形態について説明したが、本発明は、上記に限定されるものでなく、上記以外にも、その主旨を逸脱しない範囲内において種々変形して実施可能であることは勿論である。
　　　　１０　　　タイヤ（タイヤ、タイヤ本体）
　　　　１７　　　タイヤケース（タイヤ骨格部材、熱可塑性材料、第１の熱可塑性材料）
　　　　３２　　　着色シート（着色部材、第２の熱可塑性材料）
　　　　３４　　　台紙
　　　　３６　　　加熱部材　

Claims (11)

  1. 　　着色剤を含んだ熱可塑性材料で少なくとも一部が成形されている、タイヤ。
  2. 　熱可塑性材料に着色剤を付与する着色工程と、
    　前記着色剤の含まれた前記熱可塑性材料を用いてタイヤの少なくとも一部を成形する成形工程と、
    　を有するタイヤの製造方法。
  3. 　少なくとも一部が第１の熱可塑性材料で形成されたタイヤ本体と、
    　前記タイヤ本体の前記第１の熱可塑性材料で形成された部分の表面に熱溶着され、着色剤を含む第２の熱可塑性材料で形成された着色部材と、
    　を有するタイヤ。
  4. 　少なくとも一部が第１の熱可塑性材料で形成されたタイヤ本体の前記第１の熱可塑性材料で形成された部分の表面、及び着色剤を含む第２の熱可塑性材料で形成された着色部材の少なくとも一方を加熱し、前記タイヤ本体の前記表面、及び前記着色部材の表面の少なくとも一方を軟化または溶融させる溶融工程と、
    　前記タイヤ本体と前記着色部材とを接触させて前記タイヤ本体に前記着色部材を溶着させる溶着工程と、
    　を有するタイヤの製造方法。
  5. 　前記着色部材はシート状とされ、かつ前記第２の熱可塑性材料よりも耐熱性を有する台紙に仮止めされており、
    　前記溶着工程では、前記着色部材を前記タイヤ本体に接触させ、前記台紙を前記タイヤ本体に向けて押圧することで前記タイヤ本体と前記着色部材と溶着させる、請求項４に記載のタイヤの製造方法。
  6. 　前記第１の熱可塑性材料と前記第２の熱可塑性材料とは、同種の熱可塑性材料である、請求項１または請求項３に記載のタイヤ。
  7. 　前記第１の熱可塑性材料と前記第２の熱可塑性材料とは、同種の熱可塑性材料である、請求項４または請求項５に記載のタイヤの製造方法。
  8. 　前記溶融工程では、加熱した加熱部材で前記タイヤ本体、及び前記着色部材の少なくとも一方を加熱する、請求項４、請求項５、及び請求項７の何れか１項に記載のタイヤの製造方法。
  9. 　前記加熱部材は、前記着色部材の溶着位置の外表面形状に沿った外表面を備えている、請求項８に記載のタイヤの製造方法。
  10. 　少なくとも一部が熱可塑性材料で形成されたタイヤ本体と、
    　前記本体の表面に熱溶着され、着色剤を含む材料で形成された着色部材と、
    　を有するタイヤ。
  11. 　少なくとも一部が熱可塑性材料で形成されたタイヤ本体の前記熱可塑性材料で形成された部分の表面を加熱し、前記表面を軟化または溶融させる溶融工程と、
    　前記タイヤ本体と着色剤を含む材料で形成された前記着色部材とを接触させて前記タイヤ本体と前記着色部材と溶着させる溶着工程と、を有するタイヤの製造方法。
PCT/JP2012/052409 2011-02-02 2012-02-02 タイヤ、及びタイヤの製造方法 WO2012105653A1 (ja)

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