| 摘要 |
A process for producing a filament or film of polyethylene terephthalate comprising forming a solution of polyethylene terephthalate in either phenyl ether or a mixture of phenyl ether and biphenyl, and more particularly a mixture of between 0 and 40% by weight of biphenyl and between 100 and 60% by weight of phenyl ether, extruding the solution through a spinneret or slot die, through air and into a cooling bath to form a gel filament or film, optionally removing residual solvent from the filament or film and drawing the filament or film to improve the modulus thereof. |
