Multi-layer transparent sealant film for laminating comprising high density polyethylene layer and packaging flim and pouch using the same

摘要

A multi-layer sealant film having a high transparency, which comprises: (1) a high-density polyethylene layer comprising a high-density polyethylene having a melting point of not less than 122 DEG C. and a crystallization temperature of not less than 110 DEG C.; and (2) a polyolefin layer comprising a polyolefin having a crystallization temperature of not more than 109 DEG C., wherein the multi-layer sealant film is produced by co-extruding the high-density polyethylene and the polyolefin to form a multi-layer film, and the high-density polyethylene layer is used as a heat seal layer. Also disclosed are a multi-layer packaging film comprising the multi-layer sealant film having a transparent substrate on the side opposite to layer (1), and a pouch obtained by heat-sealing the packaging film so that layer (1) comes to be the innermost layer thereof.