Process for manufacturing a bioriented film shrinkable ultra-thin and ultra-thin film obtained by said process.

摘要

The present invention concerns a PREPARATION OF A THIN FILM shrinkable BIOORIENTADA PROCESS PROCESS IN PLANE polyethylene-based linear low density CHARACTERIZED IN THAT: -is BEYOND THE HEAT melting temperature and extruded, alone or in mixture with a homopolymer of ethylene or a copolymer of ethylene and of an alpha-olefin comonomer in (SUB {9}) A (SUB {18}) density between 0.89 and 0.94, - strained and cooled A FITTING THE anneal temperature extruded film; - Stretches A FIRST TIME IN THE MEANING OF LAMAQUINA THIS MOVIE TO PROPER TEMPERATURE from 3 to 7 times the initial size of the undrawn film - Stretches A SECOND TIME IN THE SENSE PENETRATED THROUGH THIS unstretched film at temperature, Stretches UNATERCERA time in the machine direction MOVIE TO PROPER TEMPERATURE BIORRIENTADA between 1.01 and 3 times the dimension after the first sTRETCHED, cooled BIORRIENTADA FILM OBTAINED AT ROOM TEMPERATURE. ALSO it REFERS TO A FILM ULTRA MONOCAPA particularly the process.