Patent ID: 6987224

Claim:
A product for high frequency signal transmission obtained by molding a polytetrafluoroethylene mixed powder, wherein said product has evident peak temperatures of 327±5° C. and 340±7° C. in the endothermic curve appearing on the crystalline melting curve which is obtained by using a differential scanning calorimeter; said polytetrafluoroethylene mixed powder is a polytetrafluoroethylene mixed powder for insulation of a product for high-frequency signal transmission, which is obtained by mixing low molecular weight polytetrafluoroethylene powder and high molecular weight polytetrafluoroethylene powder obtained by emulsion polymerization of tetrafluoroethylene, wherein said low molecular weight polytetrafluoroethylene powder has a number average molecular weight of 1,000,000±500,000 and a maximum peak temperature of 327±5° C. in an endothermic curve appearing on a crystalline melting curve which is obtained by using a differential scanning calorimeter, said high molecular weight polytetrafluoroethylene powder has a number average molecular weight of 4,500,000±1,000,000 and a maximum peak temperature of 340±7° C. in the endothermic curve appearing on a crystalline melting curve which is obtained by a differential scanning calorimeter, and said mixed powder has evident peak temperatures of 327±5° C. and 340±7° C. in the endothermic curve appearing on the crystalline melting curve which is obtained by using a differential scanning calorimeter.