Mixed polyolefinic compositions
OwnerRaymond J. Werner, William J. Jennings +2inventors
InventorsRaymond J. Werner, William J. Jennings, Daniel L. Crowley, Frank J. Smith
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Abstract
Polyolefenic compositions are formed from a mixture of polyethylene and amorphous polypropylene, or a mixture of isotactic polypropylene, amorphous polypropylene and polyethylene, wherein the polyolefenic compositions are forced under heat and pressure through a shaping die thereby forming a geometrically-shaped polyolefenic article having a non-tacky surface. The compositions can have additives, fillers and other polymeric resins incorporated therein for modification of the physical and chemical properties of the polyolefenic compositions.
Claims4
A polyolefinic composition having a non-tacky surface which consists of a homogenous blend of:
- (a) at least 50 wt.% polyethylene resin;
- (b) about 3 to about 20 wt.% of an isotactic polypropylene resin having a density of at least about 0.903 g/cc.sup.3 ;
- and
- (c) 10 to about 40 wt.% of an amorphous polypropylene resin having a Brookfield viscosity at 375.degree. F. of at least about 10 cps and a molecular weight of at least about 200 as measured by GPC.
Dependencies are inferred from the claim text.