POLYESTER MONOFIL FOR RADIAL TYRE CARCASS

摘要

There is described a monofilament for the carcass of radial tyres. The monofilament consists of a polyester which is more than 90% polyethylene terephthalate, which has a high molecular weight corresponding to an intrinsic viscosity of at least 0.64 and which has a carboxyl group content of not more than 15 meq/kg. The monofilament has a diameter of from 0.4 to 0.9 mm, a tenacity of at least 40 cN/tex, a breaking extension of from 12 to 30%, a reference extension of about 1% under a load of 45N, a hot air shrinkage at 160 DEG C of from 0.5 to 5%, and an adhesion to rubber value of at least 30 cN/tex/cm.