Plastic composites made from incompatible plastics
First Claim
1. An extrusion die, comprising a pair of parallel exit slits and a plurality of exit ports located between said pair of parallel exit slits and evenly spaced along a line parallel to said pair of parallel exit slits.
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Abstract
Multilayer plastic composites containing at least two incompatible plastics, A and B, in which the layering sequence alternates between A and B, the layers of plastic B are discontinued at regular intervals, and the resulting gaps in the layers are filled in with plastic A, exhibit good adhesion between the layers. In preferred embodiments of the invention, the amorphous, crystalline, or semi-crystalline plastic B has a higher coefficient of thermal expansion than the amorphous plastic A. The plastic composite is preferably produced via coextrusion.
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13 Claims
- 1. An extrusion die, comprising a pair of parallel exit slits and a plurality of exit ports located between said pair of parallel exit slits and evenly spaced along a line parallel to said pair of parallel exit slits.
Specification