Patent ID: 9731447
Date: 2017-08-15
CPC Classifications: B29C

Claim:
1. A solid state draw die for drawing an oriented polymer composition comprising: a non-proportional drawing channel configured for drawing a polymer composition to form symmetric or asymmetric oriented polymer composite profiles, said non-proportional drawing channel comprising a die inlet and a die outlet, wherein the die inlet and the die outlet are connected by a convergence angle of 5 to 20° in a primary dimension, wherein an aspect ratio of the die inlet is less than an aspect ratio of an inlet profile of the polymer, an aspect ratio of the die outlet is less than an aspect ratio of an outlet profile of the polymer so as to inhibit a natural flattening of the inlet profile of the polymer during the drawing process; wherein an aspect ratio of a first cross sectional area of the non-proportional drawing channel is different from an aspect ratio of a second cross sectional area of the non-proportional drawing channel by at least about 5%; wherein the non-proportional drawing channel induces an unbalanced flow of the polymer composition with a nominal draw ratio of at least four resulting in a non-proportional deformation of the polymer composition to form an oriented polymer composite profile; and wherein the oriented polymer composite profile has a density of about 0.3 to 0.9 g/cc, and has a coefficient of linear expansion of 25×10