POLYESTER RAW MATERIAL AND FILM

摘要

This invention pertains to a polyester composition containing finely divided polymer particles in a substantially homodisperse distribution. The polymer particles are prepared in an emulsion-polymerization process and are crosslinked. The polymer particles exhibit an extremely narrow grain-size distribution and are incorporated into the polyester during the synthesis thereof. The invention also relates to films, particularly stretched films, which are produced from the polyester composition and which can also be used as base films for the production of composite films. It is additionally also possible to produce filaments and fibers from the composition according to the invention or with the addition of this composition to other polymers. The films are preferably used as bases for magnetic recording elements or for capacitors, and fiber or filaments are employed in the production of tire cord.