Patent ID: 11136423

Abstract:
To provide a modified polytetrafluoroethylene which is excellent in the moldability by paste extrusion and the mechanical property of the molded article. A modified polytetrafluoroethylene fine powder which is a fine powder of a non-melt-moldable modified polytetrafluoroethylene, characterized in that the modified polytetrafluoroethylene comprises units derived from tetrafluoroethylene, units derived from a perfluoroalkyl vinyl ether represented by CF2═CFO—CnF2n+1 (wherein n is an integer of from 1 to 6), and units derived from a perfluoroalkylethylene represented by CH2═CH—CmF2m+1 (wherein m is an integer of from 3 to 6), and that the content of the units derived from the perfluoroalkyl vinyl ether is from 0.1 to 0.25 mass % and the content of the units derived from a perfluoroalkylethylene is from 0.001 to 0.1 mass %, based on all monomer units in the modified polytetrafluoroethylene.