Method for forming fluoroplastic articles

A method for producing a fluoroplastic article, having inner and outer fluoroplastic layers and a metal meshwork, the metal meshwork being between the inner and outer fluoroplastic layers, and wherein said meshwork is stretchable and compressible in the axial direction, comprising:

• (1) winding a thin fluoroplastic belt around a stainless steel mold back and forth until the desired thickness is reached, so as to make an inner layer of the article;
• (2) compressing the metal meshwork in axial direction, so that the diameter of it is larger than that of the fluoroplastic inner layer, after the fluoroplastic inner layer is sheathed by the compressed meshwork, the latter is stretched and the diameter is made smaller, such that the meshwork closely abuts against the fluoroplastic inner layer;
• (3) winding the thin fluoroplastic belt around the metal meshwork until the desired thickness is reached, so as to make the outer layer of the article;
• (4) closely strapping the outer layer with a glass belt;
• (5) placing and sintering the strapped fluoroplastic article in an oven where it is to form the finished article.