Ethylene polymers and optionally, copolymerizable esters, films using such polymers and processes stretch hood packaging films using such.

摘要

Polymer comprising units derived from ethylene, said polymer having: a. one melt index of 0 05 to 20 g / 10 min as determined by ASTM-1238 Condition E; b. at least 10 per 1000 C-atoms of short chain branches, containing five carbon atoms or less, as determined by C13 NMR, and from 1 to 3 mol% of units derived from an ethylenically unsaturated ester copolymerizable, c. a density of 0, 90-0, 94 g / cm3, as determined by ASTM D1505, and d. relaxation time of at least 10 s calculated from determinations of shear rate and viscosity at 230 ° C using the Cross model.