Patent ID: 7307125

Claim:
A thermoplastic polymer composition comprising: from about 25% to about 45% by weight of highly crystalline polypropylene homopolymer having a melt flow greater than 40 g/10 min as measured in accordance with ASTM D1238-04; from about 15% to about 30% by weight of an ethylene-octene plastomer; from about 10% to about 20% by weight of a propylene-ethylene impact copolymer; less than about 1% by weight of rubber; and from about 15% to about 35% by weight of talc having a D 50 of about 2.0 μm or less; wherein the thermoplastic polymer composition exhibits post injection molding shrinkage in both a longitudinal flow direction and a transverse flow direction of less than 1.0%, the ratio of the percentage of post injection molding shrinkage in the longitudinal flow direction to the percentage of post injection molding shrinkage in the transverse flow direction is from about 0.8 to about 1.3, and the thermoplastic polymer composition exhibits a flexural modulus of 275,000 psi or greater as measured in accordance with ASTM D790-03.