process for preparation of items from both polyolefinem gel, as well as for the production of items with high tensile strength and elastizitaetsmodul.

摘要

Highly stretchable gel articles are prepared by contacting a shaped solvent-containing or solvent-free article of a high molecular weight polyolefin with a gaseous or liquid swelling agent at elevated temperature untill the swollen article contains 60-99 % (wt) of swelling agent, and cooling this article below the gelling temperature. The gel articles can be transformed into articles (filaments, tapes, films, tubes, bars) of high strength and modulus, by stretching at elevated temperature.