Method of extruding, orientating, slitting and fibrillating thermoplastic film.

摘要

Film extrusion-fibrillation and film extrusion-narrow slitting processes for preparing fibrillated or narrow-width thermoplastic tape. The process is characterised by conducting the extrusion-orientation stage and the slitting or fibrillation stage as separate operations, thereby minimizing process disruptions caused by film defects and breakage, and further characterised by certain film shrinkage and heat treatment modifications which facilitate such separate stage operation. The fibrillated tapes can be twisted into cordage products. The narrow-width tapes are used to make carpet backing and indoor-outdoor carpet.