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Abstract
The role of hydrostatic pressure in strengthening of polymer materials was studied. It was established that the orientation crystallization of fibers and films in a high-pressure chamber leads to significant increase of their mechanical properties. The optimal temperature and pressure for the crystallization of polyethylene were determined, providing a static strength of 490 MPa, that is higher than the strength of a type 3 steel. A strength of 100 MPa was achieved for fluorinoplast-4 oriented under pressure at a stretch ratio of about 6. This opens the possibility of obtaining high strength fibers and fabrics using this material.