Transparent multi-layer polyolefin film and process for producing the same

摘要

A multi-layer polyolefin film comprising (1) a high-density polyethylene layer comprising a high-density polyethylene having a melting point of 122 DEG C or higher at a temperature increasing rate of 10 DEG C/min and a crystallization temperature of 110 DEG C or higher at a temperature decreasing rate of 10 DEG C/min, and (2) a polyolefin layer comprising a polyolefin having a crystallization temperature of 109 DEG C or lower at a temperature decreasing rate of 10 DEG C/min, the multi-layer polyolefin film being produced by the steps of: co-extruding the high-density polyethylene and the polyolefin to form a multi-layer film, and quenching the multi-layer film.