Patent ID: 6680090
Filing Date: 2004-01-20
Classification: B29C,B29K,C08F,C08L,E04F,E06B,Y10T

Abstract:
A weatherable, mechanically stable thin walled complex profile comprising, a composite comprising:(a) greater than about 25 wt % of a polyolefin polymer composition having a melt index of less than about 5 gm/10 min a melting point of about 145Â° C. to about 158Â° C.; and (b) greater than about 50 up to about 75 wt % of a wood fiber, the fiber having a moisture content of less than about 5000 parts of water per million parts of the profile, a particle size of about 100 to about 2000 &mgr;m and an aspect ratio of about 1:2 to about 1:5; wherein the profile comprises an extruded complex hollow member having a defined support direction and a wall thickness of less than about 5 mm, the tensile modulus of the profile is greater than about 5Â·105 psi, the heat distortion temperature of the profile in the defined support direction is greater than about 75Â° C. at about 264 psi (ASTM D 648).