Process of producing aramid twisted yarn which is dipped made from filament and short staple having excellent stability for extrusion―type high temperature and high pressure rubber hose

摘要

The present invention relates to a composite ply-twisted reinforcing yarn using an aramid filament and a short-fiber spun yarn for use as a heat-resistant high-pressure rubber hose of an internal combustion engine. It expresses the rigidity of the filament and improves the physical and chemical adhesion performance by utilizing the excellent elongation of meta-aramid wound as an outer layer and the hair of the spun yarn. It is possible to provide an aramid ply-twisted yarn composite dip cord for an extruded heat-resistant high-pressure rubber hose that improves the mechanical strength and adhesion of the silicone hose, which is the final product, by 20 to 40%.