| 摘要 |
<p>Compositions of matter are disclosed comprising plastic films prepared from blends of various ethylene polymers, such as polyethylene or copolymers of polyethylene, with copolymers of ethylene and propylene which have either (A) a molecular weight, as determined by their Mooney viscosity at 260 DEG F., of less than about 50 and/or an ethylene content of less than about 70 %, or (B) a molecular weight, as determined by their Mooney viscosity at 260 DEG F., of greater than about 50 and an ethylene content of greater than about 70 weight percent, and in which the blends have a degree of tackiness, as measured by the force required to separate a pair of films produced from these blends, of greater than about 10 millinewtons cm. Preferably, the disclosed blends utilize low density polyethylene in admixture with about 1 to 30 weight percent of the ethylene propylene copolymer, and the copolymer has a molecular weight distribution, as measured by GPC, of greater than about 10 MWw/MWn.</p> |
