Fluororesin material, fluororesin material for high frequency transmission, and covered electric wire for high-frequency transmission
A fluororesin material including a melt-fabricable fluororesin, the fluororesin material having a dielectric constant of 2.1 or less and a dielectric loss tangent of 0.00030 or less at 12 GHz. Also disclosed is a fluororesin material for high-frequency transmission including the fluororesin material and a coated electric wire for high-frequency transmission including a solid insulating coating layer made of the fluororesin material.
1. A fluororesin material comprising a melt-fabricable fluororesin and having a dielectric constant of 2.1 or less and a dielectric loss tangent of 0.00020 or less at 12 GHz,
wherein the total number of functional groups consisting of —CF=CF 2 , —CF 2 H, —COF, —COOH, —COOCH 3 , —CONH 2 , and CH 2 OH per 10 6 main-chain carbon atoms of the fluororesin is 6 or less, and
wherein the fluororesin is at least one copolymer selected from the group consisting of a tetrafluoroethylene/(per)fluoro(alkyl vinyl ether) copolymer and a tetrafluoroethylene/hexafluoropropylene copolymer.
2. A fluororesin material for high-frequency transmission comprising the fluororesin material according to claim 1 .
3. A coated electric wire for high-frequency transmission comprising the fluororesin material according to claim 1 as an insulating coating layer, wherein the insulating coating layer is a solid insulating coating layer.