Importance

Loading Importance Indicators...

Abstract

Extensible multilayer film comprising two external layers made of thermoplastic polyolefinic resins, two optional intermediate adhesive layers and one central layer; the said external layers being realized with ethylene/.alpha.-olefins copolymers resins, the said optional intermediate layers being realized with adhesive resins preferably containing linear low density polyethylene modified with polar groups, ethylene vinylacetate terpolymers, or maleic anhydride modified ethylene acrylate, the said central layer being realized with resins which impart to the film, sinergetically with the other components of the same film, the following features: glass transition temperature in a range between 20 and 70.degree. C.; longitudinal strain greater than 200%, at a temperature comprised between 25 and 45.degree. C., applying reduced load, less than 0.5 N/mm; necking in the range of the 40-60%; longitudinal thermo-shrinkage in the range of 40-60%; residual elastic memory, giving rise to a longitudinal force less than 0.05 N/mm when the film is subjected to a longitudinal strain.gtoreq.70%; optical properties, such as: light transmission greater than 90%, opacity less than 5%, and gloss higher than 100, following to longitudinal strain.

Loading the Abstract Image...

First Claim