| 摘要 |
<p>A tetrafluoroethylene based resin molding material excellent in high frequency electric characteristics which provides a formed product having a relative dielectric constant of 2.2 or less and a dielectric loss tangent of 1.60 x 10-4 or less at 12 GHz and a standard specific gravity of 2.192 or more and less than 2.3. AS the tetrafluoroethylene based resin, use is preferably made of a homopolymer of terafluoroethylene or a copolymer of 99.9 to 99.9999 mole % of terafluoroethylene and 0.0001 to 0.1 mole % of a specific fluoromonomer. The tetrafluoroethylene based resin molding material has good electric characteristics particularly a low dielectric loss tangent also in a microwave region, can be extruded by a reduced extrusion pressure due to its low molecular weight and can provide a formed product excellent in smoothness of its surface, and thus is useful as a material for use in the equipment using a microwave such as a device for satellite communication, a portable telephone base station and the like, for example, as a coating material for a coaxial cable.</p> |
