Method of orientating thermoplastic polyether ether ketone films.

摘要

A thermoplastic polyether ether ketone film or sheet containing therein a repeating unit represented by the formula:
<CHEM>
alone or in combination with one or more different repeating units is calendered at a linear pressure of at least 100 kg/cm by the use of at least one pair of pressure rolls at a temperature of 80 DEG C to 320 DEG C while applying a backward tension of at least 78.5 Pa x 10<5>.
<??>The polymeric film or sheet may contain units to give heat-resistance, e.g. of a polyether sulfone. 16 examples of repeating units of a polyarylene polyether sulfone are given.
<??>A lubricant, e.g. polyethylene glycol, may be used, and the film may be preheated.
<??>The rolled film or sheet may have a thickness of 28 to 270 mu m and has a high tensile strength of up to 3040 Pa x 10<5> in the longitudinal direction.