Stretch wrap film

1. Stretchable packaging film comprising a polymer blend comprising (wt%): I) 50-90% of an ethylene polymer comprising repeat units derived from an ester Compositions wherein the ester is selected from the group consisting of (1) C3-C20 unsaturated monocarboxylic acids and C1-C24 mono-aliphatic or cycloaliphatic ethylenically unsaturated organic ester monomers, and (2) C2- Saturated vinyl carboxylate of C18, wherein the ester content is 2.5-8 wt% based on the total weight of the final ethylene polymer composition; the ethylene polymer composition has a density in the range of 0.920-0.94 g/mL; and II) 10- 50% vinyl polymer component having a density range of 0.9-0.930 g/mL, and a melt flow rate of at most 4 g/10 minutes; the component is selected from: i) linear polyethylene, comprising ethylene And 0.5-20 mol% of CH2=CHR alpha-olefins, wherein R is a hydrocarbyl group having 2-8 carbon atoms; and ii) a polymer blend comprising (a) 80-100 parts by weight of ethylene and at least one CH2 = random copolymers of CHR alpha-olefins, wherein R is a hydrocarbon group having 1 to 10 carbon atoms, the polymer contains up to 20 mol% of CH2=CHR alpha-olefins, and has 0.88 to 0.945 g/m The density of l; and (b) 5-30 parts by weight of a random copolymer of propylene and at least one CH2=CHR alpha-olefin, wherein R is a hydrocarbon group having 2 to 10 carbon atoms, and possibly also ethylene. Random interpolymer, the interpolymer (b) contains 60-98 wt% of units derived from propylene, 2-40 wt% of repeat units derived from CH2=CHR α-olefin, and 0-10 wt% of repeats derived from ethylene The unit has more than 70% xylene insoluble component at room temperature; the stretch wrap film has an MD tear resistance ratio of greater than 0.3 and a TD tear resistance ratio, and a tensile strength of 30% in MD is between Between 6.5-15N.
[Instruction CD-ROM] D0626-1
【International Application】 2004-05-19 PCT/EP2004/005564
【 International Publication 】 2004-12-02 WO2004/104085 English 【Abstracts】 Stretchable packaging film containing a polymer blend containing (wt%): I) 50-90% inclusion Ethylene polymer compositions derived from repeating units of esters, wherein the esters are selected from (1) ethylenically unsaturated organics of C3-C20 unsaturated monocarboxylic acids and C1-C24 mono-aliphatic or alicyclic alcohols An ester monomer, and (2) a C2-C18 saturated carboxylic acid vinyl ester wherein the ester content is from 2.5 to 8 wt% based on the total weight of the final ethylene polymer composition; the ethylene polymer composition has a density in the range of 0.920- 0.94 g/mL; and II) 10-50% vinyl polymer component, having a density range of 0.9-0.930 g/mL, and a melt flow rate of up to 4 g/10 minutes; said Koala The stretch wrap film has an MD tear resistance value and a TD tear resistance ratio of greater than 0.3, and a 30% MD tensile strength of between 6.5-15N. The stretchable film is suitable for use as a stretched, snug package for various bundling, packaging, and wrapping operations.