Fluoroplastic articles and producing method thereof

Abstract

The present invention relates to a fluoroplastic article, comprising inner and outer fluoroplastic layers and a metal meshwork, the metal meshwork is arranged between the inner and outer fluoroplastic layers, characterized by that said meshwork can be stretched and compressed in the axial direction.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of the square web with fixed grids, which is used in prior fluoroplastic articles.

FIG. 2 is a schematic view of the metal meshwork according to the invention, which has variable rhombic grids.

FIG. 3 is a schematic view of the metal meshwork in FIG. 2, which is in the compressed state.

FIG. 4 is a schematic view of the metal meshwork in FIG. 2, which is in the stretched state.

FIG. 5 is a schematic view of the change of metal meshwork according to the invention in the flanged portion, this portion is formed by the metal meshwork engaged with a tube.

FIG. 6 is an section view taken from arrow A-A in FIG. 5.

Claims

1. A fluoroplastic article, comprising inner and outer fluoroplastic layers and a metal meshwork, the metal meshwork being arranged between the inner and outer fluoroplastic layers, wherein said meshwork is stretchable and compressible in the axial direction.

2. A fluoroplastic article according to claim 1, wherein the grids of said meshwork have a variable rhombic shape and comprise interweaving metal wires.

3. A fluoroplastic article according to claim 1, wherein said meshwork comprises welded metal webs with stretchable and compressible rhombic grids.

4. A method of producing the fluoroplastic article according to claim 1, 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 which is compressible in the 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.