| 摘要 |
Smooth, glossy, thin films based on linear polyethylene with Mw > 4 X 10<5>, preferably above 8 x 10<5>, having a strength above 1 GPa, a modulus above 20 GPa, and a FEM value above 150 KJ/m, and having a thickness of below 25 mu m, preferably below 2 mu m, an opacity below 15% and a water vapour transmission value below 0.6. Such films can be prepared by spinning or extruding a semidiluted solution of polyethylene, thermoreversible gelation of the spun or extruded article, followed by high, biaxial stretching.
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