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AssigneeBAE Systems Tensylon High Performance Materials, Inc.
InventorsKenneth C. Harding, Gene C. Weedon
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A process for the production of virtually full density polyolefin suitable for further processing by drawing to form a high tenacity, highly oriented polyolefin sheet comprising: a) feeding a metered amount of polyolefin powder into the nip between two heated calender rolls; b) rolling the powder through the nip under these conditions until a coherent sheet of polyolefin is produced. According to a highly preferred embodiment, initially, the nip is set at a gap smaller than the size of the smallest polyolefin powder particle and at a temperature above the melting point of the powder and once a coherent sheet of polyolefin exits the nip the temperature in the nip is lowered to a temperature below the melting point of the polyolefin powder and the gap increased to a desired level above the thickness of the largest powder particle.
A process for the production of a coherent virtually fully dense polyolefin sheet suitable for further processing by drawing to produce a high tenacity, highly oriented film, tape, fiber, ribbon or sheet from a polyolefin powder comprising:
A process for the production of high tenacity, highly oriented polyolefin sheet having a high heat of fusion comprising:
Dependencies are inferred from the claim text.