WO2005019336A1 - 成形体及びその製造方法、高周波信号伝送用製品並びに高周波伝送ケーブル - Google Patents
成形体及びその製造方法、高周波信号伝送用製品並びに高周波伝送ケーブル Download PDFInfo
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- WO2005019336A1 WO2005019336A1 PCT/JP2004/012211 JP2004012211W WO2005019336A1 WO 2005019336 A1 WO2005019336 A1 WO 2005019336A1 JP 2004012211 W JP2004012211 W JP 2004012211W WO 2005019336 A1 WO2005019336 A1 WO 2005019336A1
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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
- H01B3/441—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 alkenes
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethylene
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
Definitions
- the present invention relates to a molded article, a method for producing the molded article, a high-frequency signal transmission product, and a high-frequency transmission cable.
- the dielectric loss is a function of the dielectric constant ( ⁇ ) and the dielectric loss tangent (tan ⁇ ), and a smaller value is preferable as an insulating material.
- Polytetrafluoroethylene [PTF #] is known as an insulating material having a small dielectric constant and a small dielectric tangent. Conventionally, PTFE has been formed by firing with heating to a temperature equal to or higher than the melting point.
- PTFE has a dielectric constant ( ⁇ ) and a dielectric loss tangent (tan ⁇ ) due to a decrease in dielectric loss. It has been proposed to use it in an unfired or semi-fired state that lowers However, unfired or semi-fired PTFE has a problem of poor mechanical strength.
- a high-frequency transmission cable such as a coaxial cable may be subjected to terminal processing in which a terminal portion is cut in a longitudinal direction while leaving a core wire.
- terminal processing in which a terminal portion is cut in a longitudinal direction while leaving a core wire.
- the insulating coating material covering the core wire is made of unfired or semi-fired PTFE, if the terminal processing is performed, the cut ends become fibrous and the end processing property is poor.
- Patent Document 1 JP-A-11-31442
- Patent Document 2 JP-A-11-283448
- Patent Document 3 Japanese Patent Application Laid-Open No. 2001-357729
- An object of the present invention is to provide a molded article having excellent electrical characteristics such as a dielectric loss tangent and a dielectric constant, as well as excellent end workability and mechanical strength in view of the above-mentioned situation.
- the present invention is a molded article comprising a polytetrafluoroethylene resin (A) and a thermoplastic resin (B) having a melting point of 100 ° C or more and less than 322 ° C,
- A polytetrafluoroethylene resin
- B thermoplastic resin
- the maximum peak temperature of the endothermic curve that appears on the crystal melting curve by differential scanning calorimetry is higher than 340 ° C.
- This is a molded product characterized by being 3 ° C or more higher than the maximum peak temperature of the endothermic curve that appears on the melting curve.
- the present invention comprises heat-treating a polytetrafluoroethylene resin (A) and a thermoplastic resin (B) having a melting point of 100 ° C or more and less than 322 ° C at a specific resin temperature.
- the present invention is a product for transmitting a high-frequency signal, characterized by having the above-mentioned molded body strength.
- the present invention is a high-frequency transmission cable including the above-mentioned molded body as an insulating coating layer.
- the molded article of the present invention comprises a polytetrafluoroethylene resin (A) having a melting point of 100 ° C or more,
- thermoplastic resin (B) having a temperature of less than 2 ° C.
- the fluoropolymer constituting the polytetrafluoroethylene resin (A) may be a tetrafluoroethylene [TFE] homopolymer or a copolymer of TFE and a trace monomer other than TFE. In addition, it may be non-melted (hereinafter, referred to as modified polytetrafluoroethylene [modified PTFE]).
- TFE tetrafluoroethylene
- modified PTFE modified polytetrafluoroethylene
- Examples of the trace amount of monomer include perfluoroolefin, perfluoro (alkynolebiertheinole), a cyclic fluorinated monomer, perfluoroalkylethylene, and the like.
- Hexafluoropropylene [HFP] and the like can be mentioned as the above perfluoroolefin, and perfluoro (alkyl vinyl ether) and perfluoro (propyl butyl ether) can be mentioned as the perfluoro (alkyl vinyl ether).
- Examples of the cyclic fluorinated monomer include fluorodixol and the like, and examples of perfluoroalkylethylene include perfluoromethylethylene and the like.
- the content of the trace monomer units derived from the trace monomers in the total monomer units is usually in the range of 0.001 to 1 mol%.
- the “trace amount of monomer unit” refers to the molecular structure of the fluoropolymer. A portion, which is derived from the corresponding fluoromonomer.
- the TFE unit is a part of the molecular structure of the fluoropolymer, which is derived from TFE, and is represented by _ (CF-CF)-.
- all monomer units refers to fluoropolymer
- the “content (molar%) of a trace amount of monomer units in all monomer units” refers to a monomer derived from the above “all monomer units”, that is, a total amount of monomers that constitute a fluoropolymer. accounts the amount means the molar fraction of trace monomer the trace monomer units derived from a (mol 0/0).
- the content of the trace monomer units to the total monomer units from the viewpoint to lower the dielectric loss tangent of the resulting molded article, the lower is preferred instrument preferred upper limit is 0.1 mol 0 / 0 .
- a TFE homopolymer is preferable from the viewpoint of reducing the dielectric loss tangent of the obtained molded article.
- the polytetrafluoroethylene resin (A) preferably has a number average molecular weight of 3.58 to 8,000,000.
- a more preferred lower limit of the number average molecular weight of the polytetrafluoroethylene resin (A) is 4,000,000, and a more preferred upper limit is 7,000,000.
- the number average molecular weight is calculated from a standard specific gravity measured by a water displacement method according to ASTM D-792, using a sample molded according to ASTM D-489598.
- the polytetrafluoroethylene resin (A) has a maximum endothermic curve [T] of an endothermic curve that appears on a crystal melting curve obtained by a differential scanning calorimeter, and has a differential peak after heating to 340 ° C. or higher. From the maximum peak temperature [T] of the endothermic curve that appears on the crystal melting curve by the scanning calorimeter
- the maximum peak temperature [T] is preferably higher than the maximum peak temperature [T] by 5 ° C or more.
- the temperature is 10 ° C or higher.
- the maximum peak temperature [T] within the above range Temperature the temperature range above the maximum peak temperature [T] is usually 21 ° C or less.
- the endothermic curve is obtained by using a differential scanning calorimeter to increase the temperature at a rate of 10 ° C./min.
- the polytetrafluoroethylene resin (A) has the maximum peak temperature [T].
- the polymer has no history of firing after the polymerization of polytetrafluoroethylene.
- the expression “heating to 340 ° C. or higher” means firing the “polytetrafluoroethylene resin (A)”.
- heating the polytetrafluoroethylene resin (A) to a temperature equal to or higher than the melting point described below may be referred to as “calcination”.
- the fact that there is no history of heating to a temperature equal to or higher than the melting point is referred to as “unfired” or “semi-fired”.
- the baking is performed by heating at a temperature of 340 ° C. for 5 minutes, for example, a force that varies depending on the shape (eg, thickness, etc.) of the molded body made of the polytetrafluoroethylene resin (A) at the time of heating. be able to.
- the melting point of the polytetrafluoroethylene resin (A) is preferably 340 ⁇ 7 ° C.
- a more preferred lower limit of the melting point is 338 ° C, and a more preferred upper limit is 342 ° C.
- the melting point of the polytetrafluoroethylene resin (A) is determined by measuring an endothermic peak at a heating rate of 10 ° C./min using a differential scanning calorimeter. .
- the above polytetrafluoroethylene resin (A) is prepared by emulsion polymerization, suspension polymerization, or the like depending on the intended use of the molded article, the molding method, and the method for preparing a mixture with the thermoplastic resin (B) described below. Although it can be produced by a known method such as solution polymerization or the like, one obtained by emulsion polymerization is preferable from the viewpoint of moldability.
- the polytetrafluoroethylene resin (A) is, for example, a resin obtained by emulsion polymerization
- a polymerized dispargylon obtained by emulsion polymerization or a concentrate thereof Alternatively, powder obtained by praying the above dispurgeon may be used.
- the powder obtained by the above-mentioned emulsion polymerization may be fine powder.
- the average particle size (average primary particle size) of the resin particles (primary particles) in the polymer sponge after polymerization of the polytetrafluoroethylene resin (A) is usually 0.1-0. .
- a preferred lower limit of the above average primary particle size is 0.2 x m, and a preferred upper limit is 0.
- the average primary particle size is obtained by measurement based on a gravity sedimentation method.
- thermoplastic resin (B) is a thermoplastic resin having a melting point of 100 ° C or more and less than 322 ° C.
- the above melting point is 300 ° C in terms of heat resistance at the time of use of the obtained molded body such as an antenna.
- the following is preferred.
- thermoplastic resin (B) As a method for measuring the melting point of the thermoplastic resin (B), a known measurement method can be adopted depending on the type of the resin.For example, using a differential scanning calorimeter, the temperature is raised at a rate of 10 ° C / min. It can be determined by measuring the endothermic peak under the conditions.
- thermoplastic resin (B) has a melting point within the above range
- the molded article of the present invention has a stable shape when used at a relatively low temperature of, for example, room temperature to less than 100 ° C. Since it has a characteristic and does not cause a change in transmission characteristics, it can be suitably used for applications requiring high-frequency transmission characteristics.
- thermoplastic resin (B) examples include a polyolefin resin and a fluorine-containing resin.
- polystyrene resin examples include a polypropylene [PP] resin and a polyethylene [PE] resin.
- the polypropylene [PP] -based resin may be one in which the propylene polymer constituting the propylene polymer is a propylene homopolymer, or a copolymer of propylene as a main monomer and a monomer copolymerizable with propylene. It may be a polymer.
- the propylene copolymer include, for example, a copolymer in which propylene and ethylene are copolymerized in a random or block manner. It may also contain a propylene / ethylene copolymer or the like.
- melt-processable fluorine-containing resin examples include tetrafluoroethylene / perfluoro (alkylbutyl ether) [TFEZPAVE] copolymer resin and tetrafluoroethylene Z-hexafluoropropylene copolymer.
- FEP tetrafluoroethylene / perfluoro (alkylbutyl ether)
- EFE tetrafluoroethylene / ethylene copolymer
- EEP ethylene / tetrafluoroethylene Z-hexafluoropropylene copolymer
- TFE / PAVE copolymer resin examples include a tetrafluoroethylene Z-perfluoro (methylbutyl ether) copolymer [MFA] resin, a tetrafluoroethylene / perfluoro (propylbutyl ether) copolymer [PFA ] Resins and the like.
- fluorine-containing resin PFA resin and FEP resin are preferable.
- thermoplastic resin (B) a FEP resin, a TFE / PAVE copolymer resin, a polyolefin, and the like can be obtained because a molded article having excellent heat resistance and being stably usable even at a relatively high temperature can be obtained. Resins are preferred.
- TFE / PAVE copolymer resin an MFA resin and a PFA resin are preferable.
- the thermoplastic resin (B) preferably has an MFR at 372 ° C. of 0.5 to 80 (g / 10 minutes).
- the above MFR has a more preferred lower limit of 8 (g / 10 minutes), a more preferred upper limit of 50 (g / 10 minutes), and a still more preferred upper limit of 25 (g / 10 minutes).
- melt viscosity is measured in accordance with ASTM D-2116.
- thermoplastic resin (B) Since the thermoplastic resin (B) has a low melt viscosity, the particles formed of the polytetrafluoroethylene resin (A) at the time of heat treatment described below, or the gaps between the oriented particles of the molded resin during the heat treatment described below are formed. Even if the oriented particles are sufficiently spread and fibrillated, the gap can be filled so as to entangle the fibrils, and solidified by cooling in that state, so that the molded article of the present invention has high mechanical strength. It is excellent, and when it is a covering material for a core wire, it does not generate fibrils even if the ends are cut off in the longitudinal direction, so that it has excellent end workability.
- thermoplastic resin (B) has a higher relative dielectric constant and a higher dielectric loss tangent than the polytetrafluoroethylene resin, so that the electrical properties of the polytetrafluoroethylene resin were vitalized. It has been avoided to mix them in the molded body.
- the molded article of the present invention uses only polytetrafluoroethylene resin as the resin, despite using a thermoplastic resin having inferior electrical properties to polytetrafluoroethylene resin. This achieves excellent mechanical strength and end-capability without impairing the relative dielectric constant and dielectric loss tangent of the molded article.
- the number average molecular weight of the thermoplastic resin (B) is not particularly limited, but is preferably 10500,000. If the number average molecular weight is too large, the moldability may decrease, while if it is too small, the mechanical strength of the obtained molded article may decrease.
- thermoplastic resin (B) has a force S that can be produced by a known method, and an aqueous dispersion of a fluorine-containing resin is used for preparing a mixture with the above-mentioned polytetrafluoroethylene resin (A).
- aqueous dispersion of a fluorine-containing resin is used for preparing a mixture with the above-mentioned polytetrafluoroethylene resin (A).
- those polymerized by an emulsion polymerization method are preferred.
- the thermoplastic resin (B) is at least 160% by mass of the total of the polytetrafluoroethylene resin (A) and the thermoplastic resin (B). But preferred.
- a preferable lower limit of the content is 5% by mass, a more preferable lower limit is 10% by mass, a preferable upper limit is 50% by mass, a more preferable upper limit is 40% by mass, and a further preferable upper limit is 30% by mass. .
- the content When the content is more than 60% by mass, the dielectric loss tangent becomes large, so that the electrical characteristics may be deteriorated.
- the content When the content is less than 1%, the hardness of the obtained molded body is reduced, so that the terminal force is reduced. The curability and mechanical strength may decrease.
- the molded article of the present invention contains a foaming agent in addition to the above-mentioned polytetrafluoroethylene resin (A) and the above-mentioned thermoplastic resin (B) in that the relative permittivity is reduced and the electrical properties are improved. There may be.
- the foaming agent is not particularly limited as long as it can generate air bubbles during molding, and examples thereof include decomposable compounds such as carbonyl hydrazide, azo compounds, and inorganic compounds.
- Examples of the carbonyl hydrazide include 4, 4-bisoxybenzenesulfonyl hydrazide.
- azo compound examples include, for example, azodicarboxylic acid amide, 5-phenyltetrazole Le.
- inorganic compound examples include boron nitride, talc, sericite, diatomaceous earth, silicon nitride, fine silica, alumina, zirconia, quartz powder, kaolin, and benzonititanium oxide.
- the foaming agent is preferably added in an amount of 0.1 to 5% by mass of the total of the polytetrafluoroethylene resin (A) and the thermoplastic resin (B).
- the amount of the foaming agent varies depending on the type of the foaming agent to be used, but is preferably 1% by mass or less in view of the dielectric loss tangent, which is more preferably 0.5% by mass or more in terms of the foaming rate.
- the molded article of the present invention is one in which the polytetrafluoroethylene resin (A) constituting the molded article has the above-mentioned maximum peak temperature [T] and is in an unfired or semi-fired state.
- the polytetrafluoroethylene resin (A) constituting the molded article has the above-mentioned maximum peak temperature [T] and is in an unfired or semi-fired state.
- the polytetrafluoroethylene resin ( ⁇ ) is not fired, but is obtained by melting and then solidifying the thermoplastic resin ( ⁇ ).
- PTFE is heated at a temperature equal to or higher than its melting point, so that the relative permittivity and the dielectric loss tangent increase.Therefore, the molded body obtained by the above heating has a large dielectric loss and a reduced transmission speed. On the other hand, a molded body obtained without heating to a temperature higher than the melting point has poor mechanical strength, and in the case of a coating covering a core wire, a thread is used when cutting the ends of the coating in the longitudinal direction. It causes pulling and has poor end workability.
- the polytetrafluoroethylene resin ( ⁇ ) is in an unfired or semi-fired state. Since the thermoplastic resin ( ⁇ ) is solidified in a state in which the particles made of the polytetrafluoroethylene resin ( ⁇ ⁇ ) are carried between the particles or between the oriented substances thereof, the thermoplastic resin ( ⁇ ) has excellent mechanical strength, Excellent workability.
- the molded article of the present invention has excellent mechanical strength, it has excellent shape stability, and its relative permittivity is hard to change, so that when used for high-frequency signal transmission products, the transmission speed is kept stable. Can be.
- the dielectric loss tangent represented by tan [delta] is 2. is 0 X 10_ 4 below.
- Preferred upper limit of the dielectric loss tangent 0.1 a 8 X 10- 4, a more preferred upper limit is 0. 7 X 10- 4.
- the dielectric loss tangent within the above range, for example, lower limit may be 0. 15 X 10- 4, usually, the lower limit may be a 0. 2 X 10- 4.
- the relative dielectric constant ( ⁇ r) is usually 1.7-2.3.
- the lower limit of the specific dielectric constant may be 1.8, and the preferable upper limit is 2.0.
- Unfired PTFE usually has a low density of about 1.7 and a relative dielectric constant of about 1.7, and the molded article of the present invention having unfired PTFE and / or semi-fired PTFE has a low dielectric constant. It becomes.
- the dielectric loss tangent and the relative dielectric constant are measured at a temperature of 20 to 25 ° C using a network analyzer, respectively, at a temperature of 20 to 25 ° C. Is calculated.
- the molded article of the present invention has a low dielectric constant as well as an induced tangent, it can be suitably used as a dielectric loss and a scavenging insulator, and has a low dielectric loss and a stable high dielectric loss. It can be particularly suitably used as an insulator in a high-frequency signal transmission product requiring a high transmission speed.
- the transmission loss generally depends on the electric insulation resistance of the conductor and the dielectric loss ( ⁇ ).
- the dielectric loss is represented by a function of relative permittivity and dielectric loss tangent as represented by the following general formula, and is proportional to the dielectric loss tangent.
- the molded article of the present invention When used, for example, as an insulator for a high-frequency transmission cable or the like to be described later, it enables low transmission loss with low dielectric loss. It is suitable for an insulator in a product for high-frequency signal transmission.
- the molded article of the present invention can be obtained, for example, by the method for producing a molded article of the present invention.
- the method for producing a molded article of the present invention comprises heat-treating a polytetrafluoroethylene resin (A) and a thermoplastic resin (B) having a melting point of 100 ° C or more and less than 322 ° C. is there [0047]
- the above-mentioned polytetrafluoroethylene resin (A) and the above-mentioned thermoplastic resin (B) are molded into a desired shape, and simultaneously with the above-mentioned molding. Or, it is preferable that the above heat treatment is performed after the above forming process.
- the above-mentioned polytetrafluoroethylene resin (A) and the above-mentioned thermoplastic resin (B) are preliminarily mixed with each other in terms of homogeneity of the obtained molded body when molding into a desired shape. It is preferable to keep it.
- the method for preparing a mixture comprising the polytetrafluoroethylene resin (A) and the thermoplastic resin (B) includes, for example, (i) a powder comprising the polytetrafluoroethylene resin (A). Dry blending method (dry blending method) in which a powder comprising the above-mentioned thermoplastic resin (B) is mixed with (i) one of the above-mentioned polytetrafluoroethylene resin (A) or the above-mentioned thermoplastic resin (B) A co-coagulation method in which a powder made of the other resin is added to the aqueous dispersion made of the above resin, and coagulation is performed.
- the aqueous dispersion made of the above polytetrafluoroethylene resin (A) is mixed with the above heat dispersible resin.
- a co-coagulation method of mixing and coagulating with an aqueous dispersion composed of the plastic resin (B) and the like are mentioned.
- the co-coagulation method of the above (ii) or (iii) is preferred because it is easy to obtain a molded product that is sufficiently mixed, homogeneous, and has excellent mechanical strength and electrical properties (iii)
- the co-coagulation method is more preferable.
- the mixing ratio of the polytetrafluoroethylene resin (A) and the thermoplastic resin (B) can be appropriately set according to the type of each resin used.
- the content of the thermoplastic resin (B) is preferably 116% by mass of the total of the polytetrafluoroethylene resin (A) and the thermoplastic resin (B).
- the thermoplastic resin (B) has a preferable lower limit of 5% by mass and a more preferable lower limit of 10% by mass in terms of end workability and mechanical strength of the obtained molded product.
- the preferable upper limit is 50% by mass
- the more preferable upper limit is 40% by mass
- the more preferable upper limit is 30% by mass.
- the co-coagulation method of the above (iii) is not particularly limited. However, the aqueous dispersion obtained after the polymerization of the polytetrafluoroethylene resin (A) and the thermoplastic resin (B) is used. After mixing, a method comprising reacting a coagulant such as an inorganic acid or a metal salt thereof is preferred.
- the average particle size of the polytetrafluoroethylene resin (A) is such that the polytetrafluoroethylene resin (A) and the thermoplastic resin (B) are sufficiently mixed and a homogeneous mixture is easily obtained.
- the diameter and the average particle diameter of the thermoplastic resin (B) are more preferably substantially the same.
- the method of molding into a desired shape using the polytetrafluoroethylene resin (A) and the thermoplastic resin (B) is not particularly limited. Examples thereof include known methods such as compression molding, extrusion rolling molding, extrusion coating molding, wrapping tape, and calender rolling.
- the above-mentioned molding process is performed in addition to the above-mentioned polytetrafluoroethylene resin (A) and the above-mentioned thermoplastic resin (B), for the purpose of improving the molding processability and the physical properties such as the mechanical strength of the obtained molded article. Or other known processing aids or the like.
- the heat treatment is performed at a specific resin temperature.
- the “resin temperature” refers to the above-mentioned mixture at the time of sintering when forming a mixture of the polytetrafluoroethylene resin (A) and the thermoplastic resin (B). Means the temperature.
- the above-mentioned heat treatment is usually performed on a desired formed body produced by the above-mentioned forming process, and preferably, the above-mentioned desired formed body is placed inside a heating device such as a furnace.
- the temperature is set to be 15 to 20 ° C higher than the above resin temperature. For example, if the desired compact passes through the furnace in about one minute, the resin temperature will be about 15-20 ° C lower than the furnace temperature.
- the specific resin temperature is a temperature equal to or higher than the melting point of the thermoplastic resin (B) and lower than the melting point of the polytetrafluoroethylene resin (A).
- the above-mentioned specific resin temperature is preferably a temperature that does not greatly exceed the melting point of the thermoplastic resin (B) in terms of energy efficiency, but it depends on the type of the thermoplastic resin (B) used. Is a temperature 5 ° C higher than the melting point of the thermoplastic resin (B) used, more preferably, and the lower limit is a temperature 10 ° C higher than the melting point of the thermoplastic resin (B) used.
- the preferred upper limit of the specific resin temperature is used in that the temperature of the heating device is set such that the resin temperature is lower than the melting point of the polytetrafluoroethylene resin (A).
- the temperature is 5 ° C. lower than the melting point of the polytetrafluoroethylene resin (A) to be used, and a more preferable upper limit is the above-mentioned polytetrafluoroethylene resin (A). ) 10 ° C lower than the melting point.
- the method for producing a molded article of the present invention uses the polytetrafluoroethylene resin (A) and the thermoplastic resin (B) having a melting point within the above range.
- the specific resin temperature in the above can be set widely.
- the heat treatment is performed at the specific resin temperature, and thus the obtained molded article is obtained by keeping the polytetrafluoroethylene resin (A) unfired or semi-fired. In this state, the thermoplastic resin (B) is solidified after being melted. For this reason, the method for producing a molded article of the present invention provides a molded article having excellent mechanical strength with low relative dielectric constant and dielectric loss tangent and excellent end workability as described above for the molded article of the present invention.
- Heat treatment temperature Manufacturable by a simple and easy method.
- a product for high-frequency signal transmission comprising the above-described molded article of the present invention is also one of the present invention.
- the high-frequency signal transmission products are not particularly limited as long as they are products used for transmitting high-frequency signals.
- the above-mentioned molded article of the present invention can be suitably used as an insulator because of its low relative dielectric constant and dielectric loss tangent.
- a printed wiring board is preferable in that electrical characteristics can be obtained.
- the printed wiring board is not particularly limited, but examples include printed wiring boards for electronic circuits such as mobile phones, various types of consumers, and communication devices.
- an antenna cover is preferable in terms of low dielectric loss.
- the method for molding into the above (1) molded plate and (2) molded article is not particularly limited.
- the polytetrafluoroethylene resin (A), the thermoplastic resin, After mixing the resin (B) and, if desired, a known processing aid, etc., compression molding or extrusion rolling molding is performed.
- the coated electric wire is preferably a high-frequency transmission cable in that good heat resistance and electric characteristics are obtained.
- a coaxial cable is preferable.
- An inner conductor, an insulating coating layer, an outer conductor layer, and a protective coating layer are sequentially laminated from the core to the outer periphery.
- each layer in the above structure is not particularly limited, but usually, the inner conductor has a diameter of about 0.1 to 3 mm, the insulating coating layer has a thickness of about 0.33 mm, and the outer conductor layer has a thickness of about 0.33 mm.
- the thickness is about 0.510 mm, and the thickness of the protective coating layer is about 0.52 mm.
- the high-frequency transmission cable can be manufactured by a known method, for example, a method described in JP-A-2001-357729, a method described in JP-A-9-155120, and the like.
- the high-frequency transmission cable has the above-mentioned molded article of the present invention as an insulating coating layer.
- the method for forming the molded article of the present invention as the insulating coating layer is not particularly limited, and examples thereof include an extrusion coating method, a tape wrapping method, and a calender rolling method.
- the extrusion coating method is preferred as the molding method, and paste extrusion molding is preferred as the extrusion coating method.
- paste extrusion assist is preferably applied to a powder composed of the polytetrafluoroethylene resin (A) and the thermoplastic resin (B), which are preferably obtained by emulsion polymerization. After mixing the ingredients, they are loaded into a paste extruder, extruded so as to cover the core wire, heated and dried at a temperature of 100-250 ° C, and then fired by heat treatment at the above specified resin temperature. And the like.
- the molded article of the present invention has the above-described structure, it has a low dielectric constant and a low dielectric loss tangent, and therefore has a low dielectric loss and excellent mechanical strength and end workability. Since the method for producing the molded article of the present invention has the above-described configuration, the molded article can be produced by a simple and easy method of controlling the heat treatment temperature. Since the high-frequency signal transmission product of the present invention is made of the molded product of the present invention, the dielectric strength is low, the mechanical strength and the shape stability are excellent, and the high-frequency transmission speed is high and stable. Things. BEST MODE FOR CARRYING OUT THE INVENTION
- Resin temperature determined by a contact thermometer.
- a cylindrical stirring vessel having a diameter of 180 mm and having a stirrer equipped with a bar-shaped stirring blade (cylinder outer diameter 80 mm, height 50 mm) at the lower end of the shaft core.
- An extrusion aid (Biopar G, manufactured by Etsu Chemical Co., Ltd.) was mixed with the above co-coagulated powder in an amount of 20.5% by mass based on the total mass of the co-coagulated powder, and the mixture was heated at 25 ° C for 12 hours. Matured. Then, it was put into a preforming machine, preformed under a pressure of 3 MPa, and extruded an 8 mm bead using a 38 mm cylinder diameter paste extruder (manufactured by Jenindus). Next, the bead was heated to 60 ° C. with hot water of 80 ° C., and was rolled to a thickness of 500 ⁇ m with a 500-mm diameter metal roll to obtain an 80 mm square sheet. The obtained sheet was dried at a temperature of 200 ° C for 5 minutes to evaporate the extrusion aid, and then placed in a thermostat at a furnace temperature of 350 ° C for 1 minute. Heat treatment was performed to obtain a sheet (1).
- Relative permittivity and dielectric loss tangent (tan ⁇ ): The obtained sheet was subjected to resonance frequency and Qu value (electric field strength) using a network analyzer (HP8510C, manufactured by Hewlett-Packard) by the cavity resonator method. ) Is measured at a temperature of 20 25 ° C, and each value at 12 GHz is increased.
- the insulation layer can be easily cut without fibrillation.
- the case where the insulation layer was cut and the cut surface was clean was rated as ⁇ , the case where the insulating layer could be cut without fibrillation, but the cut surface was rough, and the case where fibrillation of fragments occurred. .
- a sheet was prepared in the same manner as in Example 1 except that the mixing ratio between the PTFE resin and the PFA resin was changed as shown in Table 1, the relative dielectric constant and the dielectric loss tangent were measured, and the end workability was evaluated.
- Example 2 the melting point temperature of the obtained sheet (1) and the sheet (2) obtained by heating the sheet (1) at a temperature of 340 ° C. for 5 minutes were measured. Melting point temperature measurement force of sheet (1) The maximum peak (T) of the endothermic curve of PTFE resin that appears on the obtained crystal melting curve and the crystal melting curve obtained from the melting point temperature measurement of sheet (2) The temperature difference from the maximum peak (T) of the endothermic curve in which the PTFE resin appeared was 14 ° C.
- a sheet was prepared in the same manner as in Example 1 except that the furnace temperature was changed to 380 ° C in order to raise the resin temperature to 360 ° C, and the relative permittivity and dielectric loss tangent were measured to evaluate the end workability. did. Further, the temperature difference of the maximum peak of the endothermic power of the PTFE resin appearing on the crystal melting curve measured in the same manner as in Example 2 was 1 ° C.
- the sheet was measured for relative permittivity and dielectric loss tangent by the same method as in Example 1 except that the furnace temperature was changed to 320 ° C to make the resin temperature 305 ° C, and the end workability was evaluated.
- the sheet obtained in Comparative Example 1 the dielectric loss tangent was high and 2. 3 X 10_ 4. This is considered to be due to the decrease in the crystallinity of the PTFE resin due to the melting of the PTFE resin.
- the dielectric loss tangent was lower with 0. 5 X 10_ 4, terminal power ⁇ E was low. This is probably because PFA did not melt due to the low resin temperature.
- a sheet was prepared in the same manner as in Example 1, except that the PFA was changed to FEP and the furnace temperature was changed to 330 ° C in order to raise the resin temperature to 315 ° C, and the relative permittivity and the dielectric loss tangent were measured. The end workability was evaluated.
- a sheet was prepared in the same manner as in Example 2 except that the PFA was changed to FEP and the furnace temperature was changed to 330 ° C in order to raise the resin temperature to 315 ° C, and the relative dielectric constant and the dielectric loss tangent were measured. End Workability was evaluated.
- a sheet was prepared in the same manner as in Example 3 except that the PFA was changed to FEP and the furnace temperature was changed to 330 ° C in order to raise the resin temperature to 315 ° C, and the relative dielectric constant and the dielectric loss tangent were measured. The end workability was evaluated.
- a sheet was prepared in the same manner as in Example 4 except that the PFA was changed to FEP, and the furnace temperature was changed to 330 ° C in order to raise the resin temperature to 315 ° C, and the relative dielectric constant and the dielectric loss tangent were measured. The end workability was evaluated.
- a sheet was prepared in the same manner as in Example 5, except that the PFA was changed to FEP and the furnace temperature was changed to 330 ° C in order to raise the resin temperature to 315 ° C, and the relative permittivity and the dielectric loss tangent were measured. The end workability was evaluated.
- a sheet was prepared in the same manner as in Example 6, except that the furnace temperature was changed to 380 ° C in order to raise the resin temperature to 360 ° C, and the relative permittivity and dielectric loss tangent were measured to evaluate the end workability. did.
- a sheet was prepared in the same manner as in Example 6, except that the furnace temperature was changed to 250 ° C in order to raise the resin temperature to 240 ° C, and the relative permittivity and dielectric loss tangent were measured to evaluate end workability. did.
- Table 2 shows the results of Examples 6-10 and Comparative Examples 3-4.
- the sheet obtained in Comparative Example 3 the force dielectric tangent of excellent terminus mosquito ⁇ E property was high and 2 ⁇ 4 X 10_ 4. This is considered to be due to a decrease in the crystallinity of the PTFE resin due to the melting of the PTFE resin.
- the dielectric loss tangent was lower was low force terminal workability 0. 5 X 10_ 4. This is probably because the FEP force S did not melt because the resin temperature was low.
- a cylindrical stirring vessel having a diameter of 180 mm and having a stirrer equipped with a bar-shaped stirring blade (cylinder outer diameter 80 mm, height 50 mm) at the lower end of the shaft core.
- aqueous dispersion lOOOOg containing the TFE homopolymer particles used in Example 1
- PFA powder obtained by emulsion polymerization (number average molecular weight 500,000, average primary particle size (0.18 xm, melting point 312 ° C), about 33 g was further added, and 1.5 mL of nitric acid was further added, and the mixture was stirred for about 3 minutes to obtain a powdery substance.
- the obtained powder was washed twice with water for about 1 minute each time, and dried at a temperature of 130 ° C for 10 hours.
- a coagulated powder consisting of 90% by mass of PTFE resin and 10% by mass of PFA was obtained.
- An extruder (Aisopar G, manufactured by Etsu Chemical Co., Ltd.) was mixed with the coagulated powder in an amount of 20.5% by mass based on the total mass of the coagulated powder, and the mixture was mixed at a temperature of 25 ° C. Aged for hours. Then, it is put into a preforming machine, preformed under a pressure of 3MPa, and extruded an 8mm bead using a paste extruder (manufactured by Jennings) with a cylinder diameter of 38mm and a mandrel diameter of 16mm. Further, the bead was heated to 60 ° C.
- PTFE fine powder (number average molecular weight 4.6 million, average particle size 0.28 xm, melting point 343 ° C) 300 g and the same PFA fine powder as used in Example 11 mixed with about 33.3 g, A mixed powder was prepared by the dry mixing method (i) described above. Add the extrusion aid to the resulting mixed powder
- PFA powder (number average molecular weight 500,000, average particle size 0.18 zm, melting point 312 ° C) is converted to FEP powder (number average molecular weight 500,000, average primary particle size 0.15 ⁇ , melting point 270 ° C). Then, a sheet was prepared in the same manner as in Example 11 except that the furnace temperature was changed to 330 ° C in order to raise the resin temperature to 315 ° C, and the relative dielectric constant and the dielectric loss tangent were measured. evaluated.
- PFA powder (number average molecular weight: 500,000, average particle size: 0.18 / m, melting point: 312 ° C) was replaced with the same FEP fine powder as used in Example 13, and a furnace was used to bring the resin temperature to 315 ° C.
- a sheet was prepared in the same manner as in Example 12 except that the temperature was changed to 330 ° C, and the relative permittivity and the dielectric loss tangent were measured to evaluate the end workability.
- Example 12 The same method as in Example 12 except that the PFA fine powder was changed to PP powder (trade name: Floprene, manufactured by Sumitomo Seika) and the furnace temperature was changed to 230 ° C to bring the resin temperature to 220 ° C. And a sheet was prepared, and the relative permittivity and the dielectric loss tangent were measured to evaluate the end workability.
- PP powder trade name: Floprene, manufactured by Sumitomo Seika
- Table 3 shows the results of Examples 11 to 16.
- a coagulated powder consisting of 70% by mass of PTFE resin and 30% by mass of low-molecular PTFE resin was obtained.
- An extrusion aid (Biopar G, manufactured by Etsu Chemical Co., Ltd.) was mixed with the above-mentioned coagulated powder in an amount of 20.5% by mass based on the total mass of the above-mentioned coagulated powder, and the mixture was mixed at a temperature of 25 ° C. Aged for hours. After that, it is put into a preforming machine, preformed under a pressure of 3MPa, and then an 8mm bead is extruded using a paste extruder (manufactured by Jinindass) having a cylinder diameter of 38mm and a mandrel diameter of 16mm. Further, the bead was heated to 60 ° C.
- a paste extruder manufactured by Jinindass
- the obtained sheet was dried in a drying furnace at a temperature of 200 ° C for 5 minutes to evaporate the extrusion aid, and then heated at a furnace temperature. It was placed in a thermostat at 345 ° C. for 1 minute and heat-treated.
- a sheet was prepared in the same manner as in Example 1 except that PFA was Og and only PTFE fine powder was used, and the relative dielectric constant and the dielectric loss tangent were measured to evaluate the end workability.
- the obtained coagulated powder was molded and caloried in the same manner as in Comparative Example 6, except that only the PTFE fine powder was used and the furnace temperature and the resin temperature were changed as shown in Table 4. In the same manner as in Example 1, the relative permittivity and the dielectric loss tangent were measured, and the end workability was evaluated.
- Table 4 shows the results of Comparative Examples 5-7.
- Comparative Example 5 a force having a very good endurance was obtained. Comparative Example 6 In Comparative Example 6, in which the TFE homopolymer particles used in Example 1 were calcined and melted, the end workability was excellent, but the relative dielectric constant and the dielectric loss tangent were high. In the sheet obtained in Comparative Example 7 in which the TFE homopolymer particles used in Example 1 were not fired without melting, the relative dielectric constant and the dielectric loss tangent were low, but the terminal workability was poor.
- the molded article of the present invention has the above-described configuration, the molded article has both low mechanical properties and low end dielectric workability, which are low in relative dielectric constant and dielectric loss tangent. Since the method for producing a molded article of the present invention has the above-described configuration, the molded article is subjected to a simple and easy method of controlling the heat treatment temperature. Can be manufactured. Since the high-frequency signal transmission product of the present invention is made of the molded product of the present invention, dielectric loss is suppressed, and mechanical strength and end workability are excellent.
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- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/569,452 US7732531B2 (en) | 2003-08-25 | 2004-08-25 | Molded object process for producing the same product for high-frequency signal transmission and high-frequency transmission cable |
| EP04772172.5A EP1661947B1 (en) | 2003-08-25 | 2004-08-25 | Product for high-frequency signal transmission, process for producing the same and high-frequency transmission cable |
| JP2005513352A JP4816084B2 (ja) | 2003-08-25 | 2004-08-25 | 高周波信号伝送用製品及びその製造方法並びに高周波伝送ケーブル |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003300639 | 2003-08-25 | ||
| JP2003-300639 | 2003-08-25 |
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| WO2005019336A1 true WO2005019336A1 (ja) | 2005-03-03 |
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| PCT/JP2004/012211 Ceased WO2005019336A1 (ja) | 2003-08-25 | 2004-08-25 | 成形体及びその製造方法、高周波信号伝送用製品並びに高周波伝送ケーブル |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7732531B2 (ja) |
| EP (1) | EP1661947B1 (ja) |
| JP (1) | JP4816084B2 (ja) |
| CN (1) | CN100447194C (ja) |
| WO (1) | WO2005019336A1 (ja) |
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- 2004-08-25 EP EP04772172.5A patent/EP1661947B1/en not_active Expired - Lifetime
- 2004-08-25 WO PCT/JP2004/012211 patent/WO2005019336A1/ja not_active Ceased
- 2004-08-25 JP JP2005513352A patent/JP4816084B2/ja not_active Expired - Fee Related
- 2004-08-25 US US10/569,452 patent/US7732531B2/en not_active Expired - Fee Related
- 2004-08-25 CN CNB2004800244299A patent/CN100447194C/zh not_active Expired - Fee Related
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006164646A (ja) * | 2004-12-03 | 2006-06-22 | Du Pont Mitsui Fluorochem Co Ltd | フッ素樹脂被覆電線及びそれを用いた同軸ケーブル並びにそれらの製造方法 |
| WO2008029878A1 (fr) * | 2006-09-07 | 2008-03-13 | Nippon Valqua Industries, Ltd. | Composition de résine fluorée pour radôme, et radôme |
| WO2008099954A1 (ja) * | 2007-02-16 | 2008-08-21 | Daikin Industries, Ltd. | フッ素樹脂組成物、フッ素樹脂成形品及びその製造方法 |
| JP5131202B2 (ja) * | 2007-02-16 | 2013-01-30 | ダイキン工業株式会社 | フッ素樹脂組成物、フッ素樹脂成形品及びその製造方法 |
| US8466236B2 (en) | 2007-02-16 | 2013-06-18 | Daikin Industries, Ltd. | Fluororesin composition, fluororesin molded article and method for producing the same |
| JP2015096622A (ja) * | 2008-09-26 | 2015-05-21 | ウィットフォード コーポレーション | 硬質基材用フルオロポリマーブレンドのコーティング |
| JP2012184422A (ja) * | 2011-03-03 | 2012-09-27 | Daikin Industries Ltd | 含浸体の製造方法、及び、多層プリント配線板用積層板の製造方法 |
| WO2013042781A1 (ja) * | 2011-09-22 | 2013-03-28 | ダイキン工業株式会社 | 積層体及び積層体の製造方法 |
| JP2013078947A (ja) * | 2011-09-22 | 2013-05-02 | Daikin Industries Ltd | 積層体及び積層体の製造方法 |
| KR20140068204A (ko) * | 2011-09-22 | 2014-06-05 | 다이킨 고교 가부시키가이샤 | 적층체 및 적층체의 제조 방법 |
| KR101591615B1 (ko) | 2011-09-22 | 2016-02-03 | 다이킨 고교 가부시키가이샤 | 적층체 및 적층체의 제조 방법 |
| JP2015074217A (ja) * | 2013-10-11 | 2015-04-20 | 住友電工プリントサーキット株式会社 | フッ素樹脂基材、プリント基板、表示パネル、表示装置、タッチパネル、照明装置、及びソーラパネル |
| JP2015097257A (ja) * | 2013-10-11 | 2015-05-21 | 住友電工プリントサーキット株式会社 | フッ素樹脂基材、プリント配線板、及び回路モジュール |
| WO2015053309A1 (ja) * | 2013-10-11 | 2015-04-16 | 住友電工プリントサーキット株式会社 | フッ素樹脂基材、プリント配線板、及び回路モジュール |
| US11364714B2 (en) | 2013-10-11 | 2022-06-21 | Sumitomo Electric Printed Circuits, Inc. | Fluororesin base material, printed wiring board, and circuit module |
| JP7319573B1 (ja) | 2022-04-06 | 2023-08-02 | ダイキン工業株式会社 | 組成物および架橋物 |
| WO2023195485A1 (ja) * | 2022-04-06 | 2023-10-12 | ダイキン工業株式会社 | 組成物および架橋物 |
| JP2023154219A (ja) * | 2022-04-06 | 2023-10-19 | ダイキン工業株式会社 | 組成物および架橋物 |
| TWI900842B (zh) * | 2022-04-06 | 2025-10-11 | 日商大金工業股份有限公司 | 組成物及交聯物 |
| WO2024248095A1 (ja) * | 2023-06-02 | 2024-12-05 | Agc株式会社 | フッ素樹脂組成物、成形体、及びフッ素樹脂組成物の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2005019336A1 (ja) | 2007-11-01 |
| EP1661947A1 (en) | 2006-05-31 |
| CN100447194C (zh) | 2008-12-31 |
| EP1661947A4 (en) | 2009-03-04 |
| US20060293459A1 (en) | 2006-12-28 |
| CN1842574A (zh) | 2006-10-04 |
| EP1661947B1 (en) | 2016-05-11 |
| JP4816084B2 (ja) | 2011-11-16 |
| US7732531B2 (en) | 2010-06-08 |
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