Patent ID: 8480837

Claim:
A seamless edge-sealing method of fluorine resin coating comprising following steps: (I) putting raw material of fluorine resin which is at least one selected from PTFE, PFA, FEP and ETFE into a mold to obtain a cylinder through one of following ways: a, pressure maintaining and demolding, finally sintering a casting formed by the mold; b, mechanical injecting; c, mechanical vulcanizing; (II) cutting the cylinder into rings and cutting an annular slot on an inner wall of each ring; (III) cutting a piece of base fabric coated with fluorine resin which is at least one selected from PTFE, PFA, FEP and ETFE into a shape adapted for the ring, and then press the edge of the cut fabric coated with fluorine resin into the slot of the ring; (IV) After hot-pressing, obtaining a piece of fabric of fluorine resin coating with seamless edge-sealing.