Plastic film and infusion bag

摘要

The present invention relates to a plastic film (10) formed by a co-extrusion method, and an infusion bag formed thereof. The plastic film (10) includes at least three layers having: a first layer (1) constituted by a polyamide obtained by a ring-opening polymerization of a lactam having 11 or more carbon atoms or by polycondensing of an ω-amino acid having 11 or more carbon atoms, or a polyamide obtained by copolycondensing a dicarboxylic acid having 10 or more carbon atoms and a diamine having 6 or more carbon atoms; a second layer (2) containing a copolymer of an α-olefin and an anhydride monomer of an unsaturated carboxylic acid or an unsaturated dicarboxylic acid as the major component; and a sealing layer (3) containing a polyethylene as the major component.

主权项

1. A plastic film formed in a co-extrusion method including at least three layers, comprising:
a first layer that contains a polyamide which is a nylon 11; a second layer that contains as the main component a copolymer of an α-olefin and an anhydride monomer of an unsaturated carboxylic acid or an unsaturated dicarboxylic acid; and a sealing layer that contains a polyethylene as the main component, wherein the sealing layer includes two layers which are a layer adjacent to the second layer constituted by a mixture of 60 to 95 mass % of a linear low-density polyethylene and 5 to 40 mass % of high-density polyethylene, and a layer which is adjacent to the layer adjacent to the second layer and constituted by a high-density polyethylene.