MULTIPLE LAYER OF BIAXIAL ORIENTABLE POLYPROPYLENE LAYERS, MATTE, WITH HIGH CONTRACTION, PROCEDURE FOR THEIR DEVELOPMENT AND USE.

摘要

A SHEET OF MULTIPLE LAYERS OF POLYPROPYLENE WITH SEALABLE CAPACITY IS DESCRIBED, THAT COVERS AT LEAST ONE BASIC LAYER CONTAINING POLYPROPYLENE OR A MIXTURE OF POLYPROPYLENE AND AT LEAST ONE LAYER OF COVER, CONTAINING A MIXTURE . THE MIXTURE CONTAINS COPPOLIMERO AND TERPOLIMERO BASED ON ALFA-OLEFINS WITH 2 UP TO 10 ATOMS OF C AND HDPE. THE SHEET HAS 120 LONGITUDINAL ACTION LESS THAN 20% AND A TRANSVERSAL CONTRACTION LESS THAN 25%.