METHOD OF MANUFACTURING THERMOPLASTIC SHAPED ARTICLES Russian patent published in 1996 - IPC

FIELD: plastics; production of lightened shaped articles of various destination. SUBSTANCE: composition containing divinylstyrene thermoelastoplast, fillers, softeners, blowing agent, zinc oxide, Captax, sulfur, and diphenylguanidine is agitated, rolled, and loaded into a mould with mobile punch at 170 ± % C. Then, simultaneously, drop and raise of pressure equal to that of injection is performed with subsequent pressure drop, foaming, and removal of article out of mould. Article obtained is characterized by relative tensile strength 2.24-2.95 MPa, reduced tensile strength 4.39-4.46 MPa, relative residual post-rupture deformation 4-11%, resistance to slipping abrasion 5.6-5.75 J/cu.cm. EFFECT: improved performance of articles. 1 tbl