METHOD OF MANUFACTURING A TWO-LAYER METAL CORD RUBBERIZED IN SITU USING AN UNSATURATED THERMOPLASTIC ELASTOMER

摘要

Method of manufacturing a metal cord (C-1, C-2) with two concentric layers (Ci, Ce) of wires (11, 20, 17, 21) of M + N construction, comprising an inner layer or core (Ci) of M wires (11, 20), M varying from 1 to 4, and an outer layer (Ce) of N wires (17, 21), of the type "rubberized in situ", i.e. rubberized from the inside (22), during its actual manufacture, with rubber or a rubber composition, said method comprising at least the following steps: . - a step of sheathing the inner layer (Ci) with said rubber or said rubber composition, by passing through an extrusion head (15); . - a step of assembling the N wires of the outer layer (Ce) around the inner layer (Ci), in order to form the two-layer cord thus rubberized from the inside, said rubber is an unsaturated thermoplastic elastomer extruded in the molten state, preferably a thermoplastic elastomer of styrene type ("TPS") such as for example an SBS or SIS block copolymer.