Is it better to extrude PTFE pipes into plates or directly into plates?

Ptfe extrusion tube directly extrudes plates. The extruded PTFE tube was processed into heat shrinkable tube by hot press. The hot press heats the pipe to a certain temperature and applies a certain pressure to shrink the pipe in the length and diameter direction to form the required wall thickness and diameter. Polytetrafluoroethylene, commonly known as "the king of plastics", is a kind of high polymer polymerized with tetrafluoroethylene as monomer. Its chemical formula is (C2F4)n, which has excellent heat and cold resistance and can be used for-180 ~ 260? C long-term use.