WO2021193545A1 - 車載ネットワークケーブル用電線及び車載ネットワークケーブル - Google Patents
車載ネットワークケーブル用電線及び車載ネットワークケーブル Download PDFInfo
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- WO2021193545A1 WO2021193545A1 PCT/JP2021/011739 JP2021011739W WO2021193545A1 WO 2021193545 A1 WO2021193545 A1 WO 2021193545A1 JP 2021011739 W JP2021011739 W JP 2021011739W WO 2021193545 A1 WO2021193545 A1 WO 2021193545A1
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- network cable
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- vehicle network
- electric wire
- wire
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F214/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F214/18—Monomers containing fluorine
- C08F214/26—Tetrafluoroethene
- C08F214/262—Tetrafluoroethene with fluorinated vinyl ethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/18—Introducing halogen atoms or halogen-containing groups
- C08F8/20—Halogenation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/20—Homopolymers or copolymers of hexafluoropropene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/22—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers modified by chemical after-treatment
- C09D127/24—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers modified by chemical after-treatment halogenated
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
- H01B3/445—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds from vinylfluorides or other fluoroethylenic compounds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
Definitions
- the present disclosure relates to an electric wire for an in-vehicle network cable and an in-vehicle network cable.
- Patent Document 1 describes a twisted pair wire formed by twisting a pair of core electric wires and a drain wire having an insulating coating around a signal conductor, a conductor foil covering the outer periphery of the twisted pair wire, and a conductor foil covering the outer periphery of the conductor foil.
- the present disclosure is a thin wire having a uniform capacitance and a thin coating layer on a conductor having a small diameter, which is lightweight and has good bendability. It is an object of the present invention to provide an electric wire for an in-vehicle network cable which is difficult to make and has excellent electrical characteristics.
- the present disclosure is an electric wire having a diameter of 0.5 to 1.5 mm, comprising a conductor and a coating material for coating the periphery thereof, and the coating material is tetrafluoroethylene [TFE] / hexafluoropropylene [HFP]. ] / Perfluoro (alkyl vinyl ether) [PAVE] copolymer having a melt flow rate [MFR] measured at 372 ° C. and a load of 5 kg at 20-40 g / 10 min, 25 ° C., 6 GHz.
- the present invention relates to an electric wire for an in-vehicle network cable, which comprises a fluororesin having a melting point of 2.2 or less, a melting point of 250 ° C. or more, a MIT bending life of 2000 times or more, and a tensile elongation at 150 ° C. of 300% or more.
- the fluororesin preferably has a dielectric loss tangent of 0.0006 or less as measured at 25 ° C. and 6 GHz.
- the fluororesin is preferably a tetrafluoroethylene / hexafluoropropylene / perfluoro (propyl vinyl ether) copolymer.
- the present disclosure also provides an in-vehicle network cable comprising the electric wire for the in-vehicle network cable of the present disclosure.
- the in-vehicle network cable of the present disclosure includes a twisted pair cable including a pair of twisted electric wires, and at least one of the pair of electric wires is the electric wire for the in-vehicle network cable of the present disclosure.
- the electric wire for an in-vehicle network cable of the present disclosure has the above configuration, it is a lightweight and highly bendable thin wire having a coating layer having a uniform capacitance and a thin wall on a conductor having a small diameter, and is 150 for a long period of time.
- the coating retains its shape even when exposed to a ° C environment, is less likely to be chipped, and has excellent electrical characteristics.
- Patent Document 1 describes as a material for a coating layer of an electric wire, polyvinyl chloride, polyethylene, polypropylene, polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkyl.
- PTFE polytetrafluoroethylene
- FEP tetrafluoroethylene-hexafluoropropylene copolymer
- Fluororesin such as vinyl ether copolymer (PFA) is mentioned, but what kind of resin is suitable for network cables for automobiles is not described at all.
- the coating material For in-vehicle use, in addition to the homogeneity of the capacitance of the coating material required to reduce the transmission loss required for conventional network cables, it is also lightweight and easy to fold for laying cables inside the vehicle. Since it will be placed in a harsh environment exposed to vibration during operation, direct sunlight in summer, heat from the engine, etc., the coating material will retain its shape even when exposed to a temperature close to 150 ° C for a long period of time. It was found that excellent durability is required, which makes it difficult for defects to occur.
- the electric wire for an in-vehicle network cable of the present disclosure is an electric wire having a diameter of 0.5 to 1.5 mm, and includes a conductor and a coating material that covers the periphery thereof, and the coating material is a copolymer of TFE / HFP / PAVE. It is a polymer, MFR measured at 372 ° C and 5 kg load is 20-40 g / 10 minutes, relative permittivity measured at 25 ° C and 6 GHz is 2.2 or less, melting point is 250 ° C or more, and MIT bending life is 2000. It contains a fluororesin having a tensile elongation of 300% or more at 150 ° C. more than once.
- the cable in addition to the homogeneity of the capacitance of the coating material for reducing the transmission loss required for the network cable by the above-mentioned specific fluororesin among the fluororesins, the cable is laid in the vehicle. It is lightweight and easy to bend, and has excellent durability that keeps its shape even when exposed to 150 ° C for a long period of time and is hard to be damaged. be.
- the present disclosure also provides the use of the wires for the vehicle-mounted network cable of the present disclosure in a vehicle-mounted network cable.
- a metal conductor material such as copper or aluminum and a metal conductor material plated with silver, titanium or the like can be used.
- the conductor may be a single wire or a stranded wire obtained by twisting thin conductors.
- the conductor preferably has a diameter of 0.1 to 1.0 mm. In the case of stranded wire, the conductor diameter refers to the total diameter of the stranded wire.
- the conductor is preferably thick from the viewpoint of electrical characteristics, and the diameter of the conductor is more preferably 0.2 mm or more, further preferably 0.3 mm or more, and particularly preferably 0.4 mm or more.
- a thin one is preferable, 0.9 mm or less is more preferable, 0.8 mm or less is further preferable, 0.7 mm or less is particularly preferable, and 0. Most preferably 65 mm or less.
- Specific examples of the conductor include AWG-26 (solid copper wire with a diameter of 404 micrometers), AWG-24 (solid copper wire with a diameter of 510 micrometers), and AWG-22 (solid copper wire with a diameter of 635 micrometers). Copper wire) and the like.
- the thickness of the covering material is preferably a thin wire having a small diameter because the laying path may be narrow and there may be many bends. Therefore, from the viewpoint of weight reduction, ease of bending, and reduction of coating material cost, the thickness of the coating material is preferably thin, preferably 0.5 mm or less, more preferably 0.4 mm or less, and 0.3 mm or less. More preferably, 0.25 mm or less is particularly preferable. From the viewpoint of electrical characteristics, the thickness of the covering material is preferably thick, preferably 0.1 mm or more, and more preferably 0.15 mm or more.
- the electric wire for the vehicle-mounted network cable of the present disclosure has a diameter of 0.5 to 1.5 mm. Since the in-vehicle network cable is laid in the vehicle, it is preferably lightweight, and the laying path is narrow and may be bent frequently. The following is preferable, 1.3 mm or less is more preferable, 1.2 mm or less is further preferable, 1.1 mm or less is particularly preferable, and 1.0 mm or less is most preferable. From the viewpoint of electrical characteristics, the diameter of the electric wire is preferably large, preferably 0.6 mm or more, more preferably 0.7 mm or more, and even more preferably 0.8 mm or more.
- the fluororesin is a TFE / HFP / PAVE copolymer.
- the TFE / HFP / PAVE copolymer is excellent in that it can be melt-molded with high productivity with respect to polytetrafluoroethylene, and it is molded because it has a lower melting point than the tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.
- the TFE / HFP / PAVE copolymer has a mass ratio (TFE / HFP / PAVE) of 87.0 to 90.0 / 9.5 to 12.5 / 0.5 to 3.5 (mass%). Is preferable. If the HFP content is too low, the MIT bending life will be short, and if the HFP content is too high, the melting point will be lowered and the suitability for the 150 ° C. environment will be lowered. If the PAVE content is too low, the MIT bending life will be short, and if the PAVE content is too high, the melting point will be lowered and the suitability for the 150 ° C. environment will be lowered.
- the content of HFP units and the content of PAVE units can be measured by the 19 F-NMR method.
- the TFE / HFP / PAVE copolymer may further contain other ethylenic monomer ( ⁇ ) units.
- the other ethylenic monomer ( ⁇ ) unit is not particularly limited as long as it is a monomer unit copolymerizable with TFE, HFP and PAVE, and for example, perfluoro such as perfluoro (alkylallyl ether) is used. Examples thereof include a fluoroethylene-containing monomer such as a polymer and a non-fluorinated ethylenic monomer such as ethylene.
- the content of the other ethylenic monomer ( ⁇ ) unit is preferably 0 to 3% by mass. Perfluoro copolymers are preferred because they have better electrical properties.
- the mass ratio (TFE / HFP / PAVE / other ethylenic monomer ( ⁇ )) is It is preferably 87.0 to 90.0 / 9.5 to 12.5 / 0.5 to 3.5 / 0 to 3 (mass%).
- the TFE / HFP / PAVE copolymer is conventionally known, for example, by appropriately mixing a monomer as a constituent unit thereof and an additive such as a polymerization initiator to carry out emulsion polymerization, solution polymerization or suspension polymerization. It can be manufactured by the method.
- the TFE / HFP / PAVE copolymer at least one selected from the group consisting of perfluoro (methyl vinyl ether), perfluoro (ethyl vinyl ether) and perfluoro (propyl vinyl ether) (PPVE) is used as the PAVE. More preferably, PPVE is further preferable from the viewpoint of MIT bending life.
- the fluororesin is preferably a TFE / HFP / PPVE copolymer.
- the fluororesin has a relative permittivity of 2.2 or less measured at 25 ° C. and 6 GHz. It has a higher relative permittivity than polyethylene, which is widely used as a coating material for communication wires, and when the relative permittivity is within the above range, a wire with excellent signal transmission performance can be obtained, and the wire can be made thinner. It is advantageous to.
- the relative permittivity is preferably less than 2.2, more preferably 2.1 or less.
- the lower limit is not particularly limited, but is larger than 1.8.
- the relative permittivity is a value measured by the cavity resonator perturbation method at 25 ° C. and 6 GHz.
- the fluororesin has an MFR of 20 to 40 g / 10 minutes measured at 372 ° C. and a load of 5 kg.
- MFR of the fluororesin is in the above range, a thin coating layer having a uniform capacitance can be produced on a conductor having a small diameter, and the MIT bending life and tensile elongation at 150 ° C. are excellent. This contributes to obtaining a coated electric wire that is less likely to be damaged even when exposed to an environment of 150 ° C. for a long period of time.
- the MFR conforms to ASTM D1238-98 and can be measured at 372 ° C. with a 5 kg load.
- the fluororesin has a melting point of 250 ° C. or higher.
- a high melting point is preferable, preferably 252 ° C or higher, more preferably 253 ° C or higher, and even more preferably 254, from the viewpoint that the coating needs to maintain its shape even when exposed to an environment of 150 ° C for a long period of time.
- ° C. or higher particularly preferably 255 ° C. or higher, and most preferably 256 ° C. or higher.
- a lower melting point is preferable, 280 ° C. or lower is preferable, 265 ° C. or lower is more preferable, 263 ° C. or lower is even more preferable, 261 ° C.
- the melting point is a value obtained from the peak temperature of the endothermic curve obtained by performing heat measurement at a heating rate of 10 ° C./min using a differential scanning calorimeter according to ASTM D-4591.
- the fluororesin has a MIT bending life of 2000 times or more.
- the upper limit of the MIT bending life is not limited, but may be, for example, 300,000 times. Since the MIT bending life is within the above range, it is particularly suitable for an in-vehicle network cable in which bending and vibration are problems.
- the MIT bending life is as follows: A 0.2 mm thick press sheet is produced by compression molding, and the test temperature is 23 ° C, the rotation angle is 135 degrees on each side, and the bending speed is 175 cpm in accordance with ASTM D-2176. It is a value obtained by measurement.
- the fluororesin has a tensile elongation (EL) of 300% or more at 150 ° C.
- EL tensile elongation
- the wire coating layer is bent at a tight angle, the coating layer on the outside of the bend is stretched. Therefore, from the viewpoint that the wire coating is not damaged, a large tensile elongation is preferable, and more preferably 310% or more. It is more preferably 320% or more, and particularly preferably 330% or more.
- the larger the tensile elongation, the more preferable, and the upper limit value is not limited, but may be, for example, 1000%.
- the tensile elongation (EL) at 150 ° C. is a value measured at 150 ° C. under the condition of 50 mm / min according to ASTM D638.
- the coating material has a high melting point, a long MIT bending life, and a large tensile elongation at 150 ° C., so that the coating has a shape even when exposed to an environment at 150 ° C. for a long period of time. It becomes an electric wire that is hard to break.
- the dielectric loss tangent measured at 25 ° C. and 6 GHz is 0.0006 or less.
- the dielectric loss tangent is more preferably 0.0005 or less, further preferably 0.0004 or less, and the lower limit is not particularly limited, but is larger than 0.0002.
- the relative permittivity is a value measured by the cavity resonator perturbation method at 25 ° C. and 6 GHz.
- the dielectric loss tangent can be achieved by fluorinating the fluororesin. That is, the fluororesin is preferably fluorinated. Further, it is also preferable that the fluororesin contained in the fluororesin material of the present disclosure has a ⁇ CF 3 terminal group.
- the fluorination treatment can be carried out by, for example, a known method described in Japanese Patent No. 6134818, and specifically, the fluorination treatment is carried out by contacting a fluororesin that has not been fluorinated with a fluorine-containing compound. Can be done.
- the fluorine-containing compound is not particularly limited, and examples thereof include a fluorine radical source that generates fluorine radicals under fluorination treatment conditions.
- the fluorine radical source include F 2 gas, CoF 3 , AgF 2 , UF 6 , OF 2 , N 2 F 2 , CF 3 OF, halogen fluoride (for example, IF 5 , ClF 3 ) and the like.
- the fluorine radical source such as the F 2 gas may have a concentration of 100%, but from the viewpoint of safety, it is preferably mixed with an inert gas and diluted to 5 to 50% by mass before use. It is more preferable to dilute it to about 30% by mass before use.
- the inert gas include nitrogen gas, helium gas, argon gas and the like, but nitrogen gas is preferable from the economical point of view.
- the conditions for the fluorination treatment are not particularly limited, and the molten fluororesin may be brought into contact with the fluorine-containing compound, but it is usually below the melting point of the fluororesin, preferably 20 to 220 ° C., more preferably. Can be carried out at a temperature of 100 to 200 ° C.
- the fluorination treatment is generally carried out for 1 to 30 hours, preferably 5 to 25 hours.
- the fluorination treatment is preferably such that the fluororesin that has not been fluorinated is brought into contact with the fluorine gas (F 2 gas).
- the coating material may have voids in the coating layer such as a foam coating, and when the coating material is obtained by foaming, it foams. It may contain a nucleating agent.
- a nucleating agent known effervescent nucleating agents described in JP-A-2010-513676, Japanese Patent No. 5757347, and US Pat. No. 4,764,538 can be used.
- the content of the foam nucleating agent may be appropriately determined depending on the use of the obtained electric wire and the like, and is, for example, 0.1 to 10% by mass with respect to the coating material.
- the coating material may further contain a thermoplastic resin other than the fluororesin, for example, by laminating.
- thermoplastic resin other than the fluororesin include general-purpose resins such as polyethylene resin, polypropylene resin, vinyl chloride resin, and polystyrene resin; and engineering plastics such as nylon, polycarbonate, polyether ether ketone resin, and polyphenylene sulfide resin. ..
- the layer of the thermoplastic resin other than the fluororesin is preferably 60% or less, more preferably 50% or less, even more preferably 40% or less, and particularly preferably 30% or less from the viewpoint of electrical characteristics.
- the coating material contains the fluororesin.
- the coating material may be made of only the above-mentioned fluororesin, or may contain a conventionally known filler or the like in addition to the above-mentioned fluororesin as long as the effect of the in-vehicle network cable electric wire of the present disclosure is not impaired. It may be.
- the fluororesin is preferably 70% by mass or more, more preferably 80% by mass or more, and 90% by mass or more of the coating material. Further preferably, it is particularly preferably 95% by mass or more, and most preferably 99% or more.
- a known filler as described in Patent No. 6148818 can be used, and graphite, carbon fiber, coke, silica, zinc oxide, magnesium oxide, tin oxide, antimony oxide, calcium carbonate, etc.
- examples thereof include magnesium carbonate, glass, talc, mica, mica, aluminum nitride, calcium phosphate, cericite, diatomaceous earth, silicon nitride, fine silica, alumina, zirconia, quartz powder, kaolin, bentonite, titanium oxide and the like.
- the shape of the filler is not particularly limited, and examples thereof include fibrous, needle-like, powder-like, granular, and bead-like.
- the coating material may further contain other components such as known additives as described in Japanese Patent No. 6144818.
- other components include fillers such as glass fiber, glass powder, and asbestos fiber, reinforcing agents, stabilizers, lubricants, pigments, and other additives.
- the present disclosure provides an electric wire having a small capacitance fluctuation width.
- the capacitance blur width evaluates the homogeneity of the capacitance of the wire coating, and the smaller the capacitance blur width is, the more homogeneous the capacitance of the wire coating is. When a cone break occurs, it indicates that an electric wire with a stable and uniform capacitance has not been produced. The worse the capacitance homogeneity, the larger the transmission loss of the electric wire, and the better the capacitance homogeneity, the smaller the transmission loss of the electric wire.
- the present disclosure provides an electric wire that is hard to crack even if it is wound around an electric wire having the same diameter and heat-treated at 150 ° C. for one month, and then the electric wire is rewound.
- the characteristic of this electric wire is that the coating retains its shape even when exposed to an environment of 150 ° C. for a long period of time, and it is difficult for the coating to be chipped.
- the electric wire for an in-vehicle network cable of the present disclosure is preferably a foamed electric wire having voids in the coating material from the viewpoint of improving electrical characteristics and weight reduction, and is solid from the viewpoint of easiness of crushing of the coating layer. It is preferably a line.
- the solid wire means a wire having substantially no voids inside the covering material, and can also be an electric wire provided with a solid covering layer.
- the vehicle-mounted network cable of the present disclosure includes the above-described electric wire for the vehicle-mounted network cable of the present disclosure.
- the present disclosure also provides the use of automotive network cables for automotive networks.
- Examples of the vehicle-mounted network cable of the present disclosure include a coaxial cable, a twisted pair cable, two parallel lines, four parallel lines, eight parallel lines, and the like.
- an outer conductor layer made of metal for example, a metal mesh
- a resin layer is formed around the outer conductor layer.
- a cable formed by forming a cable can be mentioned.
- the resin layer (sheath layer) is not particularly limited, but includes fluoropolymers having TFE units such as TFE / HFP-based copolymers and TFE / PAVE-based copolymers, polyvinyl chloride [PVC], polyethylene and the like. It may be a layer made of resin.
- the outer conductor layer and the resin layer (sheath layer) can be coated by a conventionally known method.
- the vehicle-mounted network cable of the present disclosure includes a twisted pair cable including a pair of twisted electric wires, and at least one of the pair of electric wires is the above-described electric wire for the vehicle-mounted network cable of the present disclosure.
- a twisted pair cable it is less susceptible to noise, and it is particularly suitable as an in-vehicle network cable in which large noise is likely to occur.
- the vehicle-mounted network cable of the present disclosure may include a pair of twisted pair cables, or may include two or more pairs of twisted pair cables.
- the number of twisted pair cables is preferably 1 to 4, more preferably 1 or 2, and even more preferably 1.
- the vehicle-mounted network cable of the present disclosure preferably includes a jacket that surrounds the twisted pair cable.
- the material of the jacket include fluorine-containing copolymers having TFE units such as TFE / HFP-based copolymers and TFE / PAVE-based copolymers, and resins such as polyvinyl chloride [PVC] and polyethylene. It is not limited.
- the thickness of the jacket is not particularly limited and may be appropriately set according to the purpose.
- the vehicle-mounted network cable of the present disclosure may include an outer conductor layer made of metal (for example, metal mesh, aluminum foil, etc.) around the twisted pair cable.
- the outer conductor layer functions as a shield, and the stability is further improved. However, from the viewpoint of light weight and bendability, it is preferable that there is no shield.
- the vehicle-mounted network cable of the present disclosure is preferably a vehicle-mounted Ethernet cable, and more preferably a 100BASE-T1 or 1000BASE-T1 network cable.
- the present disclosure also provides an in-vehicle network system comprising an in-vehicle computer and an in-vehicle network cable of the present disclosure connected to the in-vehicle computer.
- the vehicle-mounted network system of the present disclosure may include at least one vehicle-mounted computer, and may include two or more vehicle-mounted computers.
- the in-vehicle computer and the in-vehicle network cable of the present disclosure may be directly connected or indirectly connected.
- the vehicle-mounted network cable of the present disclosure and the vehicle-mounted computer may be connected via a hub, a router, or the like.
- the in-vehicle computer is not limited as long as it is a computer mounted on a vehicle, and examples thereof include an in-vehicle electronic control unit (in-vehicle ECU), an in-vehicle telematic control unit (in-vehicle TCU), and the like.
- the vehicle-mounted network system of the present disclosure may include a first vehicle-mounted computer, a second vehicle-mounted computer, and a vehicle-mounted network cable of the present disclosure that connects the first vehicle-mounted computer and the second vehicle-mounted computer.
- composition NMR analyzer for example, AVANCE300 high temperature probe manufactured by Bruker Biospin
- 19 F-NMR measurement was performed with the measurement temperature set to (melting point of polymer +20) ° C., and the value was obtained from the integrated value of each peak. ..
- MIT Bending Life A 0.2 mm thick press sheet was prepared by compression molding, and MIT measurement was performed in accordance with ASTM D-2176. No. Using a 307 MIT type bending tester (manufactured by Yasuda Seiki Seisakusho), the measurement conditions were a test temperature of 23 ° C., a rotation angle of 135 degrees on each side, and a bending speed of 175 cpm.
- the MIT bending life is an index of bending resistance. The higher this value, the better the bending resistance and the higher the crack resistance against mechanical stress.
- Capacitance blur width of 30,000 meters average Capacitance measurement was performed for 2 hours using a capacitance measuring device Capac HS (Type: MR20.50HS, manufactured by Zumbach), and calculated as a process capability index (Cp).
- Cp is sequentially stored in USYS 2000 (manufactured by Zumbach), the upper limit (USL) is set to +1.0 (pf / inch), and the lower limit (LSL) is set to -1.0 (pf / inch) for analysis. bottom.
- Table 1 shows the results of evaluating the physical characteristics of the copolymer using the obtained pellets. Further, the obtained pellets were used to perform electric wire coating molding under the following molding conditions to obtain an electric wire (solid wire).
- the wire coating extrusion molding conditions are as follows.
- Table 1 shows the results of evaluating the capacitance blur width on average of 30,000 meters.
- Table 1 shows the results of evaluating the physical characteristics of the TFE / HFP / PPVE copolymer using the obtained pellets. Further, using the obtained pellets, an electric wire coating was performed in the same manner as in Example 1 to obtain an electric wire (solid wire). Table 1 shows the results of evaluating the capacitance blur width on average of 30,000 meters.
- TFE / HFP 86.5 / 13.5 [mass ratio], ⁇ FR17 [g / 10 minutes]
- Table 1 shows the results of evaluating the physical characteristics of the TFE / HFP copolymer using the obtained pellets. Further, using the obtained pellets, coating molding was attempted in the same manner as in Example 1, but continuous molding was not possible.
- Table 1 shows the results of evaluating the physical characteristics of the TFE / HFP / PPVE copolymer using the obtained pellets. Further, using the obtained pellets, an electric wire coating was performed in the same manner as in Example 1 to obtain an electric wire (solid wire). Table 1 shows the results of evaluating the capacitance blur width on average of 30,000 meters.
- the coating material was a tetrafluoroethylene / hexafluoropropylene / perfluoro (alkyl vinyl ether) copolymer, and the melt flow rate measured at 372 ° C. and a 5 kg load was 20 to 40 g / 10 minutes.
- the present disclosure also has an effect of providing an electric wire for an in-vehicle network cable having a low relative permittivity and excellent folding resistance. It also has the effect of being excellent in tensile elongation at 150 ° C.
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Abstract
Description
なおHFP単位の含有量およびPAVE単位の含有量は、19F-NMR法により測定することができる。
上記比誘電率は、25℃、6GHzで空洞共振器摂動法にて測定する値である。
上記MFRは、小さいほうがMIT曲げ寿命および150℃での引張伸びに優れ、38g/10分以下が好ましく、37g/10分以下がより好ましい。また、径の小さい導体上に静電容量が均質な薄肉の被覆層を作製することができる点からはMFRが大きいほうが優れており、21g/10分以上が好ましく、22g/10分以上がより好ましく、24g/10分以上が更により好ましく、30g/10分以上が特に好ましい。
上記MFRは、ASTM D1238-98に準拠し、372℃、5kg荷重で測定することができる。
上記融点は、示差走査熱量計を用い、ASTM D-4591に準拠して、昇温速度10℃/分にて熱測定を行い、得られた吸熱曲線のピーク温度から求める値である。
上記MIT曲げ寿命は、圧縮成形により、0.2mm厚のプレスシートを作製し、ASTM D-2176に準拠して、試験温度は23℃、回転角度は左右各135度、屈曲速度は175cpmのMIT測定で得られる値である。
本開示の車載ネットワークシステムは、少なくとも1つの車載コンピュータを備えればよく、2つ以上の車載コンピュータを備えていてもよい。上記車載コンピュータと本開示の車載ネットワークケーブルとは直接接続されていてもよいし、間接的に接続されていてもよい。例えば、本開示の車載ネットワークケーブルと上記車載コンピュータとが、ハブ、ルーター等を介して接続されていてもよい。
上記車載コンピュータは、車両に搭載されるコンピュータであれば限定されず、例えば、車載電子制御ユニット(車載用ECU)、車載テレマティックコントロールユニット(車載TCU)等が挙げられる。
本開示の車載ネットワークシステムは、第1車載コンピュータと、第2車載コンピュータと、第1車載コンピュータと第2車載コンピュータとを接続する本開示の車載ネットワークケーブルと、を備えるものであってもよい。
(1)融点
示差走査熱量測定装置(商品名:X-DSC7000、日立ハイテクサイエンス社製)を用い、ASTM D-4591に準拠して、昇温速度10℃/分にて熱測定を行い、得られた吸熱曲線のピークから融点を求めた。
ASTM D1238-98に準拠し、メルトインデックステスター(東洋精機製作所社製)を用い、約6gの樹脂を372℃に保たれたシリンダーに投入し、5分間放置して温度が平衡状態に達した後、5kgのピストン荷重下で直径2mm、長さ8mmのオリフィスを通して樹脂を押し出して、単位時間(通常10~60秒)に採取される樹脂の質量(g)を測定する。同一試料について3回ずつ測定を行い、その平均値を10分間当たりの押出量に換算した値(単位:g/10分)を測定値とした。
NMR分析装置(たとえば、ブルカーバイオスピン社製、AVANCE300 高温プローブ)を用い、測定温度を(ポリマーの融点+20)℃として19F-NMR測定を行い、各ピークの積分値から求めた。
(ポリマーの融点+約30℃)の温度で溶融押出を行い、直径2.3mm×長さ80mmの円柱状の測定サンプルを作製した。この測定サンプルについて、ネットワークアナライザー(関東電子応用開発社製)を用いて、空洞共振器摂動法にて、6GHzでの比誘電率及び誘電正接を測定した(試験温度25℃)。比誘電率の値は、測定値の小数点2桁目を四捨五入し、誘電正接の値は、測定値の小数点5桁目を四捨五入した値とした。
圧縮成形により、0.2mm厚のプレスシートを作製し、ASTM D-2176に準拠して、MIT測定を行った。No.307 MIT形屈曲試験機(安田精機製作所製)を用い、測定条件は、試験温度23℃、回転角度は左右各135度、屈曲速度175cpmとした。MIT曲げ寿命は、耐屈曲性の指標である。この値が高いほど、耐屈曲性に優れ、力学的なストレスに対する耐クラック性が高い。
実施例または比較例において得られたペレットを、ヒートプレス成形機を用いて、直径120mm、1.5mm厚の円盤状に成形し、試験片(圧縮成形)を得た。上記試験片から、ASTM V型ダンベルを用いてダンベル状試験片を切り抜き、得られたダンベル状試験片を用いて、オートグラフ(島津製作所社製AGS-J 5kN)を使用して、ASTM D638に準じて、50mm/分の条件下で、150℃で引張伸びを測定した。
静電容量測定器Capac HS(Type:MR20.50HS、Zumbach社製)を用いて2時間測定し、工程能力指数(Cp)として算出した。なお、Cpは、逐次USYS 2000(Zumbach社製)に蓄え、上限(USL)を+1.0(pf/inch)、下限(LSL)を-1.0(pf/inch)に設定して、解析した。
なお、表1に示すようにコーンブレイクが発生した場合、連続成形ができず、静電容量ブレ幅を求めることができなかった。
各実施例・比較例の電線成形で得られた被覆電線から、長さ20cmの電線を10本切り取り、試験片とした。比較例1の電線は、被覆電線ができている部分を選別して切り取り試験片とした。
この試験片を試験片と同径の電線に巻き付け150℃にて1ケ月加熱処理を行った。室温にて冷却後、電線を巻き戻して、目視及び拡大鏡を用いて、亀裂の発生した電線の個数を数えた。一本の電線中に亀裂が一箇所でもあれば亀裂有りとした。亀裂有りと確認された電線がない場合を○、1本以上の場合×とした。結果を表1に示す。
特表2011-514407号公報の実施例2と同じ方法でTFE/HFP/PPVE共重合体(TFE/HFP/PPVE=87.9/11.1/1.0〔質量比〕、МFR24[g/10分])のフッ素化されたペレットを得た。得られたペレットを用いて共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて以下の成形条件で電線被覆成形を行って電線(ソリッド線)を得た。電線被覆押出成形条件は以下の通りである。
a)芯導体:軟鋼線AWG24(American Wire Gauge)芯線径 20.1mil
b)被覆厚み:7.2mil
c)被覆電線径:34.5mil
d)電線引取速度:1800フィート/分
e)溶融成形(押出)条件:
・シリンダー軸径=2インチ。L/D=30の単軸押出成形機
・ダイ(内径)/チップ(外形)=8.71mm/4.75mm
・押出機の設定温度:バレル部Z1(338℃)、バレル部Z2(360℃)、バレル部Z3(371℃)、バレル部Z4(382℃)、バレル部Z5(399℃)、クランプ部(404℃)、アダプター部(404℃)、クロスヘッド部(404℃)、ダイ部(404℃)に、芯線予備加熱を140℃に設定した。
特表2010-539252号公報の実施例1と同じ方法でTFE/HFP/PPVE共重合体(TFE/HFP/PPVE=87.6/11.5/0.9〔質量比〕、МFR35[g/10分])のフッ素化されたペレットを得た。得られたペレットを用いてTFE/HFP/PPVE共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて、実施例1と同様にして電線被覆成形を行って電線(ソリッド線)を得た。30000メートル平均の静電容量ブレ幅を評価した結果を表1に示す。
特許6134818号公報の実施例1と同じ方法でTFE/HFP/PPVE共重合体(TFE/HFP/PPVE=87.5/11.5/1.0〔質量比〕、МFR37[g/10分])のフッ素化されたペレットを得た。得られたペレットを用いてTFE/HFP/PPVE共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて、実施例1と同様にして電線被覆成形を行って電線(ソリッド線)を得た。30000メートル平均の静電容量ブレ幅を評価した結果を表1に示す。
国際公開第2001-018076号の実施例3と同じ方法でTFE/HFP共重合体(TFE/HFP=86.5/13.5〔質量比〕、МFR17[g/10分])のペレットを得た。得られたペレットを用いてTFE/HFP共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて、実施例1と同様にして被覆成形を試みたが連続成形できなかった。
特表2010-539252号公報の実施例3と同じ方法でTFE/HFP/PPVE共重合体(TFE/HFP/PPVE=87.6/11.5/0.9〔質量比〕、МFR44[g/10分])のペレットを得た。得られたペレットを用いてTFE/HFP/PPVE共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて、実施例1と同様にして電線被覆成形を行って電線(ソリッド線)を得た。30000メートル平均の静電容量ブレ幅を評価した結果を表1に示す。
Claims (5)
- 直径が0.5~1.5mmである電線であって、導体と、その周囲を被覆する被覆材とを備え、前記被覆材は、テトラフルオロエチレン/ヘキサフルオロプロピレン/パーフルオロ(アルキルビニルエーテル)共重合体であって、372℃、5kg荷重で測定したメルトフローレートが20~40g/10分、25℃、6GHzで測定した比誘電率が2.2以下、融点が250℃以上、MIT曲げ寿命が2000回以上、150℃での引張伸びが300%以上であるフッ素樹脂を含むことを特徴とする車載ネットワークケーブル用電線。
- 前記フッ素樹脂は、25℃、6GHzで測定した誘電正接が0.0006以下である請求項1記載の車載ネットワークケーブル用電線。
- 前記フッ素樹脂は、テトラフルオロエチレン/ヘキサフルオロプロピレン/パーフルオロ(プロピルビニルエーテル)共重合体である請求項1又は2記載の車載ネットワークケーブル用電線。
- 請求項1~3のいずれかに記載の車載ネットワークケーブル用電線を含むことを特徴とする車載ネットワークケーブル。
- 相互に撚られた一対の電線を備えたツイストペアケーブルを備え、該一対の電線の少なくとも一方が請求項1~3のいずれかに記載の車載ネットワークケーブル用電線である請求項4記載の車載ネットワークケーブル。
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| EP21776540.3A EP4130146A4 (en) | 2020-03-25 | 2021-03-22 | ELECTRICAL WIRE FOR IN-VEHICLE NETWORK CABLE AND IN-VEHICLE NETWORK CABLE |
| US17/951,730 US20230015858A1 (en) | 2020-03-25 | 2022-09-23 | Electrical wire for in-vehicle network cable, and in-vehicle network cable |
| US19/039,902 US20250182927A1 (en) | 2020-03-25 | 2025-01-29 | Electrical wire for in-vehicle network cable, and in-vehicle network cable |
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| EP4501983A1 (en) | 2022-03-30 | 2025-02-05 | Daikin Industries, Ltd. | Fluorine-containing copolymer |
| WO2023190898A1 (ja) * | 2022-03-30 | 2023-10-05 | ダイキン工業株式会社 | 含フッ素共重合体 |
| WO2023190917A1 (ja) * | 2022-03-30 | 2023-10-05 | ダイキン工業株式会社 | 含フッ素共重合体 |
| WO2023190900A1 (ja) * | 2022-03-30 | 2023-10-05 | ダイキン工業株式会社 | 含フッ素共重合体 |
| JP7364979B1 (ja) | 2022-03-30 | 2023-10-19 | ダイキン工業株式会社 | 含フッ素共重合体 |
| JP7364975B1 (ja) | 2022-03-30 | 2023-10-19 | ダイキン工業株式会社 | 含フッ素共重合体 |
| JP7381981B1 (ja) | 2022-07-15 | 2023-11-16 | ダイキン工業株式会社 | 含フッ素共重合体 |
| WO2024135735A1 (ja) | 2022-12-20 | 2024-06-27 | ダイキン工業株式会社 | 発泡成形用組成物、発泡成形体、発泡電線、発泡成形体の製造方法、電線の製造方法及び車載ネットワークケーブル |
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- 2021-03-22 CN CN202180023040.6A patent/CN115298771A/zh active Pending
- 2021-03-22 KR KR1020227033532A patent/KR102759258B1/ko active Active
- 2021-03-22 EP EP21776540.3A patent/EP4130146A4/en active Pending
- 2021-03-22 JP JP2021047294A patent/JP6985635B2/ja active Active
- 2021-03-23 TW TW110110338A patent/TWI899191B/zh active
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2022
- 2022-09-23 US US17/951,730 patent/US20230015858A1/en not_active Abandoned
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2025
- 2025-01-29 US US19/039,902 patent/US20250182927A1/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| TW202146478A (zh) | 2021-12-16 |
| EP4130146A1 (en) | 2023-02-08 |
| TWI899191B (zh) | 2025-10-01 |
| KR102759258B1 (ko) | 2025-01-24 |
| JP2021158111A (ja) | 2021-10-07 |
| JP6985635B2 (ja) | 2021-12-22 |
| EP4130146A4 (en) | 2024-04-10 |
| CN115298771A (zh) | 2022-11-04 |
| KR20220143946A (ko) | 2022-10-25 |
| US20250182927A1 (en) | 2025-06-05 |
| US20230015858A1 (en) | 2023-01-19 |
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