Polyethylene

摘要

A drawn polyethylene multi-filament yarn is provided, which comprises polyethylene having an intrinsic viscosity in decalin at 135°C of from 5 dl/g to 45 dl/g, fewer than two methyl groups per thousand carbon atoms, and less than 2 wt.% of other constituents. The yarn has a tenacity of at least 33 g/d as measured by ASTM D2256-02. When measured by dynamic mechanical analysis on a Rheometrics Solids Analyzer RSA II in a force proportional mode in tension with the static force held at 110% of dynamic force, the dynamic strain being set at 0.025 + 0.005%, the heating rate being set at 2.7 + 0.8°C/min and the frequency being set at 10 radians/sec, the yarn has no peak in the loss modulus having a full width at half height at least 10°C in a temperature range of 50°C to 125°C and at a frequency of 10 radians/sec.