METHOD FOR MAKING FIBROUS ARTICLE CHEMICALLY-RESISTANT TO AGGRESSIVE SUBSTANCES Russian patent published in 1995 - IPC

FIELD: manufacture of chemically-stable internal walls of container for transportation of aggressive liquids. SUBSTANCE: layer of thermoplastic material is connected with a layer of thermosetting resin with a fibrous filler by means of an intermediate element in the form of a fabric whose threads are made both from the fibers of the thermosetting resin layer and from the thermoplastic polymeric material of the other layer. The layer of thermoplastic polymeric material is connected with the intermediate fabric element in the course of heat treatment at the temperature and pressure sufficient for melting of the thermoplastic polymeric material. The produced blank is covered with a layer of nonset thermosetting resin with the fibrous filler. The resulting package is processed at the temperature and pressure sufficient for setting. EFFECT: higher efficiency. 5 cl, 1 dwg