| 摘要 |
A process for the production of polyethylene materials oriented at a high level is disclosed in which a selected ethylene polymer as produced is extruded or rolled at a temperature lower than its melting point and subsequently subjected to stretching. The polymer is from 5 to 50 dl/g at 135 DEG C in decalin in intrinsic viscosity and smaller than 60 ANGSTROM in crystal size on a plane (110) in the diffraction pattern. |
