Patent ID: 11939435
Assignee: ZEUS COMPANY LLC
Field: Other special machines (Mechanical engineering)
Classification: CPC C  B  Y | IPC C

Claim 11:
12. A method for providing microparticles comprising PTFE, comprising:
providing scrap PTFE;
degrading the scrap PTFE thermally and mechanically in the presence of air and/or oxygen to give degraded PTFE; and
reducing the particle size of the degraded PTFE by grinding or milling;
wherein the microparticles exhibit a Dv50 of about 20 μm to about 30 μm and an improved specific surface area (SSA) for particles of that size range of at least about 3.0 m2/g when measured by a multipoint BET method of ISO 9277,
wherein the method does not comprise irradiation.