WO2005052015A1 - フッ素樹脂及び被覆電線 - Google Patents
フッ素樹脂及び被覆電線 Download PDFInfo
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- WO2005052015A1 WO2005052015A1 PCT/JP2004/017492 JP2004017492W WO2005052015A1 WO 2005052015 A1 WO2005052015 A1 WO 2005052015A1 JP 2004017492 W JP2004017492 W JP 2004017492W WO 2005052015 A1 WO2005052015 A1 WO 2005052015A1
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- fluororesin
- copolymer
- coating
- tetrafluoroethylene
- tfe
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Classifications
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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
-
- 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
- C08F14/00—Homopolymers and 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
- C08F14/18—Monomers containing fluorine
-
- 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
-
- 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
- C08F4/00—Polymerisation catalysts
- C08F4/06—Metallic compounds other than hydrides and other than metallo-organic compounds; Boron halide or aluminium halide complexes with organic compounds containing oxygen
- C08F4/26—Metallic compounds other than hydrides and other than metallo-organic compounds; Boron halide or aluminium halide complexes with organic compounds containing oxygen of manganese, iron group metals or platinum group metals
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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
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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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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/154—Coating solid articles, i.e. non-hollow articles
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- 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
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3462—Cables
Definitions
- the present invention relates to a fluorine resin and a covered electric wire.
- Polyolefin resins such as polyethylene [PE] and polypropylene [PP] have been used as thin-walled resins.
- PE polyethylene
- PP polypropylene
- the conventional coated wire using polyolefin resin has a problem that the transmission loss increases due to the reduction in thickness.
- Coated electric wires need to transmit a large amount of information due to the development of communication technology, and therefore it is required to minimize transmission loss.
- a method of lowering the relative dielectric constant by foam coating to improve insulation properties for example, see Patent Document 1.
- the foamed coating material has insufficient strength, If the thickness is increased to overcome this, there is a problem that it is difficult to make a fine line.
- Fluororesins especially fluororesins made of tetrafluoroethylene Z perfluoro (alkyl butyl ether) copolymer [PFA] are excellent in heat resistance, flame retardancy and electrical properties. It is used vigorously for various purposes. While trying to obtain a molded product with a fine or complex shape, for example, by injection molding, There was a problem that the surface became rough on the body.
- FA has a problem that its mechanical properties are deteriorated due to low molecular weight.
- Patent Document 1 JP-A-8-7672
- Patent Document 2 Japanese Patent Application Laid-Open No. 7-182930
- Patent Document 3 JP-A-6-168627
- Patent Document 4 JP 2002-53620 A
- An object of the present invention is to provide a fluororesin capable of forming an electric wire covering material which is excellent in thin-wall formability, excellent in flame retardancy, heat resistance and electric characteristics in view of the above-mentioned situation.
- the present invention relates to a core wire having a diameter of 0.05-0.07 mm, a resin temperature of 320-370 ° C, a drawdown rate [DDR] of 80-120, a drawdown balance [DRB] of 1.0, A fluororesin characterized by the fact that it does not break when coated under the conditions of a linear velocity of 700 feet Z and a coating thickness of 30-50 m.
- the present invention relates to a fluororesin having a critical shear rate at 360 ° C of 200 to 500 sec- 1 and wherein the fluororesin is a tetrafluoroethylene Z-perfluoro (alkyl vinyl ester).
- a fluororesin characterized by being a polymer and / or a tetrafluoroethylene / hexafluoropropylene copolymer.
- the present invention provides a fluororesin having a melt flow rate at 372 ° C of more than 60 (g / 10 minutes), wherein the fluororesin is a tetrafluoroethylene Z perfluoro (alkylbutyl ether).
- Polymer and Z or tetrafluoroethylene Z hexafluoropropylene It is a fluororesin characterized by having a copolymer power.
- the present invention is a covered electric wire comprising a core wire and a covering material obtained by coating and molding the above-mentioned fluorine resin on the above core wire.
- the fluororesin of the present invention also has a melt-processable fluoropolymer having a fluorine atom directly bonded to a carbon atom.
- melting force-curable fluoropolymer has a melting point of 150 to 350 ° C. and a melt viscosity at a temperature 50 ° C. higher than the melting point of 10 6 (Pascal's) or less. There is something.
- the fluororesin of the present invention is preferably composed of a tetrafluoroethylene-based copolymer [TFE-based copolymer].
- the TFE copolymer is a polymer obtained by copolymerizing tetrafluoroethylene [TFE] and a comonomer other than TFE.
- the ratio of comonomer units other than TFE to the total monomer units of the TFE-based copolymer is such that the lower limit is, for example, 1 mol% and the upper limit is, for example, 30 mol%. If comonomer is PAVE described later, the lower limit is 0.01 may be a mole%, when the comonomer other than TFE is ethylene, the upper limit is, for example, less than 50 mole 0/0 It may be.
- the “all monomer units” are all of the portions derived from the monomer in the molecular structure of the polymer.
- the “comonomer unit other than TFE” is a portion derived from a comonomer other than TFE in the molecular structure of the TFE-based copolymer.
- the comonomer unit other than TFE is derived from hexafluoropropylene [HFP], it is represented by — [CF—CF (CF;)] —.
- the comonomer other than the above TFE is not particularly limited and includes, for example, chlorofluoroethylene [CTFE], hexafluoropropylene [HFP], perfluoro (alkyl vinyl ether) [PAVE], and the like.
- CFE chlorofluoroethylene
- HFP hexafluoropropylene
- PAVE perfluoro (alkyl vinyl ether)
- x 2 represents a hydrogen atom or a fluorine atom
- X 3 represents a hydrogen atom, a fluorine atom or a chlorine atom
- n represents an integer of 110.
- PAVE is not particularly limited, and for example, perfluoro (methyl vinyl ether)
- PPVE perfluoro (ethyl vinyl ether), perfluoro (propyl vinyl ether) [PPVE], perfluoro (butyl vinyl ether) [PBVE], etc.
- PPVE perfluoro (ethyl vinyl ether), perfluoro (propyl vinyl ether) [PPVE], perfluoro (butyl vinyl ether) [PBVE], etc.
- PPVE is preferable because of its excellent heat resistance. .
- the TFE-based copolymer may be obtained by polymerizing the above-mentioned TFE, a comonomer other than TFE, and a trace amount of monomer.
- the trace monomer include those described above as comonomers other than TFE, and one or more of them can be used in combination.
- the TFE-based copolymer is not particularly limited, and includes, for example, a TFEZPAVE copolymer, a T FEZHFP copolymer, an EtZTFE copolymer, an EtZTFEZHFP copolymer, a TFEZVd FZHFP copolymer, and the like.
- a copolymer represented by a monomer such as the copolymers exemplified above, may not be represented by a trace amount of monomer in accordance with a common practice. It does not exclude polymers obtained by copolymerizing trace monomers.
- the fluororesin of the present invention is preferably a TFEZPAVE copolymer, a TFEZHFP copolymer, or a Z or EtZTFE copolymer.
- the ⁇ TFEZPAVE copolymer, TFEZHFP copolymer and Z or EtZTFE copolymer '' may be a TFEZPAVE copolymer alone, a TFEZHFP copolymer alone or an EtZT FE copolymer alone, or a TFEZPAVE copolymer. It may be a mixture of two or more copolymers selected from the group consisting of a copolymer, a TFEZHFP copolymer and an EtZTFE copolymer.
- the mixture of two or more copolymers is generally produced by dry blending two or more copolymers.
- the ratio of perfluoro (alkylbutyl ether) unit to all monomer units of the TFE ZPAVE copolymer is 0.1%. is preferably 10 mol 0/0 - 01 mol 0/0.
- perfluoro (alkyl butyl ether) unit is a portion derived from perfluoro (alkyl butyl ether) in the molecular structure of the TFE-based copolymer. If the proportion of perfluoro (alkyl vinyl ether) units is small, the crack resistance of the coated electric wire is likely to be reduced. Increasing the ratio of perfluoro (alkyl butyl ether) units increases the melt viscosity (HMFR), which can improve the thin film formation properties, but tends to decrease the electrical properties and immediately decrease the heat resistance. .
- HMFR melt viscosity
- a more preferred lower limit is 0.5 mol%, a still more preferred lower limit is 1 mol%, a still more preferred lower limit is 1.9 mol%, and a particularly preferred lower limit is 2.5 mol%.
- a more preferred upper limit is 4.5 mol%, still more preferred upper limit is 4 mol 0/0.
- the fluororesins of the present invention include TFEZPAVE copolymer, TFEZHFP copolymer and
- Group strength composed of EtZTFE copolymer It may be composed of a polymer alloy obtained by using two or more selected copolymers.
- the “polymer alloy” is obtained by melt-kneading two or more kinds of polymers before the start of coating molding.
- the above-mentioned polymer alloy may be completely compatible at the polymer chain level, or may be one in which two or more kinds of polymers are chemically bonded, or constitute this matrix in a polymer matrix. It may be one in which a domain other than a polymer is formed. The size of the domain is preferably 1 ⁇ m or less, more preferably 100 nm or less, based on 30 ⁇ m of the polymer matrix.
- the combination of the copolymers may be TFEZHFP copolymer and EtZTFE copolymer, TFEZHFP copolymer and TFEZPAVE copolymer, Examples include an EtZTFE copolymer and a TFEZPAVE copolymer, a TFEZHFP copolymer, an EtZTFE copolymer, and a TFEZPAVE copolymer. Among them, the TFEZHFP copolymer and the TFEZPAVE copolymer are more preferable.
- the fluororesin of the present invention is a polymer alloy of the above TFEZHFP copolymer and TFEZPAVE copolymer
- a TFEZHFP copolymer is added based on the TFEZ PAVE copolymer.
- the ratio of the TFEZHFP copolymer to the total mass of the polymer alloy is preferably 3 to 40% by mass. A more preferred lower limit is 5% by mass and a more preferred upper limit is 25% by mass.
- the fluorine ⁇ of the present invention is a Porimaaroi comprising a TFEZPAVE copolymer and TFEZHFP copolymer
- TFE units constituting the entire Porimaaroi
- PAVE units in the Porimaaroi is the total of 100 mole 0/0 of 0. 1-4 mol 0/0 it is preferably a! /,.
- the fluororesin of the present invention may be one having the above-mentioned polymer alloy alone, may be a mixture of the above-mentioned two or more copolymers and the above-mentioned polymer alloy, or may be one or more of the above-mentioned polymer alloys. It is not a mixture of the above-mentioned copolymers, and it may be composed of the TFEZPAVE copolymer alone, the TFEZHFP copolymer alone or the EtZTFE copolymer alone, and the polymer alloy in the sense of the above.
- the fluororesin of the present invention may further contain a filler.
- the filler is not particularly limited and includes, for example, a flame retardant such as antimony oxide and calcium phosphate; coke, silica, anolemina, titanium oxide, zinc oxide, magnesium oxide, magnesium hydroxide, tin oxide, and calcium carbonate. , Magnesium carbonate, glass, talc, myc, mica, boron nitride, aluminum nitride and the like.
- the fluororesin of the present invention may contain the above-mentioned flame retardant. However, even without adding the above-mentioned flame retardant, the fluororesin originally has sufficient flame retardancy. It can be said that there is no decrease in tensile rupture strength, crack resistance, decrease in electric characteristics, etc. due to the addition of a flame retardant.
- the fluororesin of the present invention preferably has a relative dielectric constant of 1.8-2.7. A more preferred upper limit is 2.6, and a still more preferred upper limit is 2.2.
- Fluorine ⁇ of the present invention for example, in 2. 45 GHz, it is preferable dielectric loss tangent is 60 X 10- 4 or less. A more preferred upper limit is 10 X 10- 4, a still more preferred upper limit is 5 X 10 one 4. If the value of the dielectric loss tangent in the range, the lower limit for example, be a 0. 5 X 10- 4.
- the relative permittivity and the dielectric loss tangent are values measured by the cavity resonator vibration method.
- the fluororesin of the present invention can have excellent electrical properties so that the relative dielectric constant and the dielectric loss tangent fall within the above ranges.
- the fluororesin of the present invention preferably has a perfluoropolymer force in which all hydrogen atoms bonded to carbon atoms are replaced by fluorine atoms.
- the fluororesin of the present invention is made of a TFEZPAVE copolymer
- the relative dielectric constant is 2.2 or less, and the total monomer unit of the TFEZPAVE copolymer is used.
- Pafuruoro (alkyl Bulle ether) proportion of the units is 0.1 mol 0/0 or more than it is preferably tool 0.5 more preferably at mol% or more instrument 1 mol% or more occupied .
- the fluororesin of the present invention has an oxygen index at which flame retardancy is high as described above, usually exceeding 30 and preferably 90 or more.
- the oxygen index is a value measured according to ASTM D2863.
- oxygen index is usually 25-27 or more, for example, under normal conditions of use as a covering material for a covered electric wire, even if it is temporarily exposed to fire, it will continue to burn due to its self-extinguishing properties. Don't do that.
- the fluororesin of the present invention has a critical shear rate at 360 ° C of 200 (sec- 1 ) or more.
- the critical shear rate can be set at an upper limit of, for example, 500 (sec) as long as it is within the above-mentioned range, and is more preferable in that high-speed coating when used for coating molding and excellent thin-wall moldability are achieved.
- the lower limit is 220 (sec—).
- the fluororesin of the present invention preferably has a melt flow rate [MFR] of 48 (gZlO content) or more.
- MFR melt flow rate
- the above MFR has a more preferred lower limit of 50 (gZlO min), a more preferred lower limit exceeds 60 (g / 10 min), an even more preferred lower limit is 62 (g / 10 min), and a particularly preferred lower limit is 63 (g / 10 min). Minutes).
- the upper limit of the MFR can be, for example, 100 (gZlO content) within the above range, but from the viewpoint of mechanical strength, it is preferable to be 85 (gZlO content). ) Is more preferable.
- the above MFR is a value that can be measured under the conditions of a temperature of 372 ° C and a load of 5. Okg according to ASTM D-1238.
- the fluororesin of the present invention having a high MFR has a large number of active terminal groups at the polymer chain terminals, and is advantageous in that the adhesion to the core wire is improved. is there.
- the number of active terminal groups is large, so that the polymer chain terminals may be subjected to fluorination treatment to the extent that desired electrical properties are achieved.
- the fluorination treatment for example, a conventionally known method such as exposure to a fluorine gas or heating in the presence of water can be used.
- the fluororesin of the present invention preferably has a molecular weight distribution [MwZMn] in the range of 112.
- MwZMn molecular weight distribution
- a more preferred upper limit of the molecular weight distribution [MwZMn] is 1.8.
- MwZMn is a value measured according to the method described in Polym. Eng. Sci., 29 (1989), 645 (W. II. Tuminello).
- the measurement temperature of MwZMn is 330 ° C., and the data processing method and parameters are as described in the above literature.
- the fluororesin of the present invention has a resin temperature of 320 to 370 on a core wire having a diameter of 0.05 to 0.07 mm. ° C, linear velocity 700 ft. Z, withdrawal rate [DDR] 80-120, withdrawal balance [DR B] 1.0, coating thickness 30-50 / zm (hereinafter referred to as “specific coating conditions” ))
- the coating does not break when coated underneath. If the coating is cut off under the above specific coating conditions, when the core wire is formed by coating, the coated wire composed of the core wire and the coating material obtained by coating and molding the resin with the core wire becomes insufficient in terms of insulation. .
- the number of sparks per 1200 m can be set to 0 under the above-mentioned detection conditions of coating breakage, and preferably the number of sparks per 1500 m is set to 0.
- the number of sparks per 1500 m is set to 0.
- the above resin temperature is the temperature at the tip of the cylinder portion of the present invention, and is a value obtained by inserting a spring-type fixed thermocouple (manufactured by Toyo Denshi Co., Ltd.) and measuring the temperature inside the cylinder. If the resin temperature is too high, cracks or bubbles may be formed in the obtained coated wire, and if it is too low, the obtained coated wire may have poor surface smoothness.
- a preferred lower limit of the resin temperature is 330 ° C., a more preferred lower limit is 340 ° C., a preferred upper limit is 360 ° C., and a more preferred upper limit is 355 ° C.
- the coating thickness is a thickness of the coating obtained after melt-extrusion coating of the fluororesin of the present invention by coating and cooling to room temperature of 20 to 30 ° C.
- the “coating thickness of 30 to 50 m” means that the coating is performed under conditions such that the coating thickness is 30 to 50 ⁇ m.
- the above coating thickness is calculated by subtracting the outer diameter value of the core wire measured in advance from the outer diameter value of the coating wire measured using a laser microdiameter (manufactured by Takika Engineering Co., Ltd.). Is a value calculated by dividing by.
- the fluororesin of the present invention has the same coating thickness as described above without causing coating breakage even when coating under the above specific coating conditions. This enables thin-wall molding.
- the DDR value is selected in the range of 80 to 120, with a preferred lower limit of 96 and a preferred upper limit of 96. 104 and can be set to 100.
- the DDR value is selected in the range of 30 to 70, with a preferred lower limit of 40, a preferred upper limit of 65, and a value of 60. can do.
- the above “DDR” is represented by the following formula:
- D is the die opening diameter
- D is the chip outer diameter
- d is the outer diameter of the coated wire
- d represents d t c, and d represents the outer diameter of the core wire.
- the above DRB is within the allowable range of 0.9.1-1. However, if it exceeds 1.1, the coating is liable to be cut off. Elliptical shapes tend to be easily obtained, and 1.0 is usually selected.
- the fluororesin of the present invention has a force capable of preventing the coating from being cut when coated under the above-mentioned specific coating conditions, even if the core wire has a diameter of 0.13 mm or less. Is 0.05 to 0.11 mm, and even if the upper limit of the diameter is more preferably 0.08 mm, and even more preferably 0.07 mm, the coating can be prevented from being cut off.
- the smaller the diameter of the core wire the greater the curvature of the surface, and even if the resin is coated with resin on this core wire, the conventional resin will cause poor "glue" to the core wire, causing the coating to break. There was. However, even if the diameter of the core wire is as small as 0.07 mm or less, the fluororesin of the present invention does not break the coating under the specific coating conditions described above.
- the diameter of the core wire may be a value measured with a gold scale, or American Wire
- an electric wire having electrical conductivity is used to measure the breakage of the coating.
- copper, aluminum, steel or the like may be used, but copper is preferably used.
- a diameter force of 0.05-0.13 mm is equivalent to 44-36 in the American Wire Gauge [AWG]
- a diameter force of 0.11 mm is equivalent to 37-38 in the AWG.
- 0.07 mm is equivalent to 41-42 in the AWG.
- the fluororesin of the present invention is applied to a core wire having a diameter of 0.05 mm by applying a resin temperature of 320 ° C, a linear velocity of 700 feet Z, DDR120, DRBl.0, and a coating thickness of 30 m. It is more preferable that the coating does not cause cut-off when coated.
- the fluororesin of the present invention is composed of a TFEZPAVE copolymer having 6 to 10 mol% of perfluoro (alkylbutylether) units in all monomer units, a core wire having a diameter force of SO.
- the coating does not break when coated under the conditions of a temperature of 320 ° C, a linear speed of 700 feet / minute, a DDR120, DRB of 1.0, and a coating thickness of 30 / zm.
- the perfluoro (alkyl butyl ether) unit in the monomer unit is composed of TFEZPAVE copolymer having 1.9-4.5 mol%, a core wire having a diameter of 0.05 mm and It is preferable that the coating does not break when coated under the conditions of 340 ° C, linear speed of 700 feet / minute, DDR120, DRB 1.0, and coating thickness of 30 m.
- the fluororesin of the present invention does not cause coating breakage even when coated under the above-described coating conditions, it is suitable for forming a coated wire and has excellent electrical characteristics. Especially, it is suitable for electric wire coating.
- the critical shear rate can be set to an upper limit of, for example, 500 (sec) as long as the critical shear rate is within the above-mentioned range.
- a more preferable lower limit is 220 (sec—).
- the critical shear rate is determined by using a capillary graph (manufactured by BOHLIN INSTRUM ENTS) at a temperature of 360 ° C. under a specific shearing stress, with a force of 1 mm in diameter and 16 mm in length. This is the shear rate when melt fracture begins to occur.
- the above-mentioned melt fracture is a phenomenon in which, when the viscoelastic body is extruded from a narrow hole or slit, if the shear rate is too high, the shape of the extrudate becomes spiral, irregular, intermittent, shark skin, or the like. For example, by using a microscope, a magnifying glass, or the like, it is possible to confirm the presence or absence of occurrence by magnifying 16 times.
- the above fluororesin (A) has an MFR at 372 ° C. of more than 60 (gZlO content).
- Fat (B) ".
- the above fluororesin (B) Since the above fluororesin (B) has an extremely high MFR within the above-mentioned range, it has a high speed coating when used for coating molding and is extremely excellent in thin-wall moldability. Cracking properties can be further improved.
- the TFEZ PAVE copolymer as a TFE-based copolymer constituting the fluororesin (A) or the fluororesin (B) is a PAVE unit in the total monomer units of the TFEZPAVE copolymer. Is preferably 1.9-4.5 mol%, more preferably 2 mol%, more preferably 2.5 mol%, and more preferably 4 mol%.
- P AVE copolymer and TFEZHFP copolymer when the total strength of the TFE, PAVE and HFP units constituting the entire polymer alloy is 100 mol%, the PAVE unit in the polymer alloy is it is preferably 0. 1 4 mol 0/0 of a total of 100 mole 0/0.
- the fluorinated resin (A) and the fluorinated resin (B) are TFEZPAVE copolymers, the melting start temperature and the melting point are hardly lowered even though the ratio of PAVE units is relatively large. No, showing excellent heat resistance. Such excellent heat resistance may be due to the effect of the polymerization recipe. No clear cause is known.
- the TFEZPAVE copolymer constituting the fluororesin (A) or the fluororesin (B) may be composed of only TFE and PAVE, or may be composed of TFE and PAVE. Further, it may be a copolymer capable of acting as a trace monomer copolymerizable with TFE and PAVE.
- the trace monomer in the TF EZPAVE copolymer or TFEZHFP copolymer as the TFE-based copolymer constituting the fluororesin (A) or the fluororesin (B) is the TFE-based copolymer. Is preferably 0.1 to 1.5 mol% of all monomer units of the formula (1).
- a TFE-based copolymer composed of TFE, HFP, and PAVE is obtained by comparing the ratio of the HFP unit to the ratio of the PAVE unit in all the monomer units of the TFE-based copolymer. If the proportion of HFP units is greater than the proportion of PAVE units, TFEZHFP copolymer, the proportion of PAVE units is greater than the proportion of HFP units !, and the proportion of TFEZPAVE copolymer is! /.
- the MFR of the fluororesin (A) and the fluororesin (B) at 372 ° C is more preferably 63 (gZlO content) at the lower limit of U.
- the MFR of the fluororesin (A) and the fluororesin (B) at 372 ° C can be set to an upper limit of, for example, 100 (gZlO component) within the above range, but the mechanical strength In view of this, it is more preferable to be 85 (g / 10 minutes), and it is more preferable to be 81 (g / 10 minutes).
- both the fluororesin (A) and the fluororesin (B) are excellent in increasing the coating speed and forming a thin wall, generally, the coating does not cut off under the above-mentioned coating cutout detection conditions. Shows the same electrical properties and flame retardancy as in the above ranges.
- TFEZ PAVE copolymer is preferred as the TFE-based copolymer constituting the fluororesin (A) and the fluororesin (B).
- the MFR is within the above-mentioned range. despite the high, exhibit excellent mechanical properties, further the ratio of the PAVE units in the total monomer units of the TFEZPAVE copolymer 2.5 mole 0/0 - if a 4 mol 0/0, It shows better mechanical properties, for example, MIT bending life force of 000 times or more.
- the above MIT bending life was measured using a bending tester (manufactured by Yasuda Seiki Co., Ltd.) according to ASTM D-2176 on a film (thickness 220 m x width 13 mm) made of fluorine resin. is there.
- fluorine resin without (A) or (B) is used to refer to the above. This is a concept that can include all the fluorine resin of the present invention in addition to the fluorine resin (A) and the fluorine resin (B).
- the fluorine resin of the present invention is preferably a fluorine resin for covering electric wires.
- the coated electric wire of the present invention comprises a core wire and a coating material obtained by coating and molding the above-mentioned core wire with the fluorine resin of the present invention.
- the coated electric wire of the present invention is coated with the fluororesin of the present invention as a coating material, it can have heat resistance enough to withstand solder reflow processing.
- the coated electric wire of the present invention can be easily coated by using the fluororesin of the present invention as a coating material even if the core wire has a small diameter of 0.13 mm or less.
- the core wire has a preferable upper limit force of 0.08 mm and a more preferable upper limit force of 0.07 mm.
- the diameter of the core wire of the coated electric wire of the present invention is preferably 0.02 mm or more.
- Examples of the material of the core wire include copper, aluminum, steel, and the like, and copper is preferable from the viewpoint of adhesion to the covering material.
- the coating material preferably has a thickness of 10 ⁇ m to 60 ⁇ m.
- a more preferred lower limit is 15 / z m, more preferably ⁇ lower limit ⁇ , more preferred than 20 / z m ⁇ , an upper limit, 55 / z m ⁇ even more preferred! /, And the upper limit is 50 ⁇ m.
- the thickness of the coating material is a value after cooling to room temperature of 20 to 30 ° C. after coating.
- the thickness of the covering material can be reduced as in the above-described range, and the crack resistance can be improved.
- the thickness of the coating material was previously measured from the outer diameter of the coated electric wire measured using a laser microdiameter (manufactured by Takika Engineering Co., Ltd.) in the same manner as the coating thickness described above under the specific coating conditions. It is the value obtained by dividing the value obtained by subtracting the outer diameter of the core wire by 2.
- the coated electric wire of the present invention is suitably used as a coaxial cable.
- a coaxial cable a small-diameter coaxial cable is also possible.
- a mopile device such as a mobile phone.
- the above-mentioned mobile phone has a structural restriction in the foldable foldable portion, and requires a thick film in order to improve strength, but also requires thinning, so that the coated electric wire of the present invention is preferably used. it can.
- the insulated wire of the present invention is also suitable for the transmission line of medical video microscopes. For! /, You can.
- the fluororesin of the present invention has the above-described configuration, it is possible to form an electric wire covering material that is excellent in thin-wall forming property and excellent in flame retardancy, heat resistance, and electric properties.
- the temperature was kept at 20 ° C. and the stirring speed was kept at 200 rpm. Then, tetrafluoroethylene was added to 0. The pressure was increased to 67 MPa, and ethylene [Et] was further injected to 0.86 MPa. Next, the temperature in the system was raised to 35 ° C, the pressure in the system was raised to 1.2 MPa, and then 0.18 kg of a 50% methanol solution of di-n-propyl peroxydicarbonate was added to carry out polymerization. Started. Since the pressure in the system decreased with the progress of polymerization, a gas having a molar ratio of TFE and Et of 55:45 was continuously supplied, the pressure in the system was maintained at 1.2 MPa, and the system was continued for 45 hours.
- the stirring speed was kept at 200 rpm. Then, tetrafluoroethylene [TFE] was added to 0.6. After the pressure was increased to MPa, 0.06 kg of a 50% methanol solution of di-n-propyl peroxydicarbonate was charged to initiate polymerization. As the pressure in the system decreased as the polymerization proceeded, TFE was continuously supplied to keep the pressure constant, and PPVE added 0.072 kg of calories per hour and continued the polymerization for 25 hours. After discharging and returning to atmospheric pressure, the obtained reaction product was washed with water and dried to obtain 30 kg of powder.
- TFE tetrafluoroethylene
- the powder was subjected to melt-kneading conditions and pellet heating conditions shown in Table 1 to obtain pellet-like fluorine resin F-17.
- Synthesis Example 18 Synthesis of Fluoro-Resin F-18 After pouring 43 L of distilled water into a 174 L autoclave and sufficiently purging with nitrogen, 43 kg of hexanefluoropropylene [HFP], 1.15 kg of PPVE, and 0.85 kg of methanol were charged. Was maintained at 25.5 ° C., and the stirring speed was maintained at 200 rpm. Next, after injecting TFE to 0.83 MPa, the polymerization initiator (H (CF CF) COO)
- Cl C2 C3 and C4 indicate four temperature measurement points on the cylinder. The above-mentioned temperature measurement points are equally spaced from each other, and become closer to the injection hole from C1 to C4.
- AD is the temperature of the adapter and D is the temperature of the die.
- the melting peak when the temperature was raised at a rate of 10 ° CZ was recorded, and the temperature corresponding to the maximum value was defined as the melting point (Tm).
- the mass (g) of the polymer flowing out per unit time (10 minutes) from a nozzle having a diameter of 2 mm and a length of 8 mm under a load of 5 kg was measured at each measurement temperature.
- the fluororesin F-1 prepared in Synthesis Example 1 was coated and molded under the molding conditions shown in Table 3 using a copper wire (0.07 mm ⁇ ) as a core material.
- the measurement frequency is At 45 GHz
- the sample shape was measured with a 1.8 mm X l. 8 mm X 130 mm square bar.
- a coating material was manufactured under the same extrusion conditions as in Example 1 except that the fluororesin F-12 prepared in Synthesis Example 12 was used, and evaluation was performed by the same evaluation method as in Example 1. Table 4 shows the results
- a coating material was manufactured under the same extrusion conditions as in Example 1 except that the fluororesin F-13 prepared in Synthesis Example 13 was used, and evaluation was performed by the same evaluation method as in Example 1. Table 4 shows the results
- a coating material was manufactured under the same extrusion conditions as in Example 1 except that the fluororesin F-14 prepared in Synthesis Example 14 was used, and evaluation was performed by the same evaluation method as in Example 1. Table 4 shows the results
- a coating material was manufactured under the same extrusion conditions as in Example 1 except that the fluororesin F-15 prepared in Synthesis Example 15 was used, and evaluation was performed by the same evaluation method as in Example 1. Table 4 shows the results
- a coating material was produced under the same extrusion conditions as in Example 1 except that the fluororesin F-16 prepared in Synthesis Example 16 was used, and evaluation was performed by the same evaluation method as in Example 1. Table 4 shows the results
- a coating material was manufactured under the same extrusion conditions as in Example 1 except that the fluororesin F-17 prepared in Synthesis Example 17 was used, and evaluation was performed by the same evaluation method as in Example 1. Table 4 shows the results
- a coating material was manufactured under the same extrusion conditions as in Example 1 except that the fluororesin F-18 prepared in Synthesis Example 18 was used, and evaluation was performed by the same evaluation method as in Example 1. Table 4 shows the results [0095] Comparative Example 1
- Low-density polyethylene (Mirason 3530, density: 0.925gZcm 3 , MFR: 0.25 (gZlO content), manufactured by Mitsui Dupont Polychemicals) 50% by mass, 50% by mass of magnesium hydroxide Coating molding was performed at the temperature and extrusion conditions shown in FIG. Next, evaluation was performed by the same evaluation method as in Example 1. Table 4 shows the results.
- the coating material prepared in Examples 1-116 had a lower dielectric constant and a lower dielectric loss tangent than the coating material prepared in Comparative Examples 1-2.
- a fluorinated resin that is also a TFEZPAVE copolymer, a TFEZHFP copolymer, a TFEZHFPZPPVE copolymer, or a polymer alloy containing a TFEZPAV E copolymer and a TFEZHFP copolymer.
- the coating materials prepared in Examples 18 and 10-16 were particularly low in relative permittivity and dielectric loss tangent, and also excellent in flame retardancy due to high oxygen index.
- MFR was measured by the above method (3), and critical shear rate and MIT were measured by the following evaluation methods.
- Example 17 When Examples 17 and 19 were compared with Example 23, the TFEZPAVE copolymer having the same MFR but having a PPVE unit of 1.9 mol% or more proved to be excellent in the MIT value. In particular, it was found that the TFEZPAVE copolymer having a PPVE unit of 2.5 mol% or more has a further excellent MIT value.
- the fluororesin of the present invention is suitably used, for example, as a covering material for small-diameter electric wires requiring high electrical insulation and thin-wall forming properties.
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Abstract
Description
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US10/580,404 US7638588B2 (en) | 2003-11-26 | 2004-11-25 | Fluororesin and coated electric wire |
JP2005515792A JP4591352B2 (ja) | 2003-11-26 | 2004-11-25 | フッ素樹脂及び被覆電線 |
CN2004800350584A CN1886434B (zh) | 2003-11-26 | 2004-11-25 | 含氟树脂及被覆电线 |
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JP (1) | JP4591352B2 (ja) |
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JPWO2005052015A1 (ja) | 2007-12-06 |
KR100769434B1 (ko) | 2007-10-22 |
JP4591352B2 (ja) | 2010-12-01 |
US7638588B2 (en) | 2009-12-29 |
US20070149734A1 (en) | 2007-06-28 |
KR20060096454A (ko) | 2006-09-11 |
CN1886434A (zh) | 2006-12-27 |
CN1886434B (zh) | 2011-01-19 |
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