| 摘要 |
<p>PURPOSE: To provide a packaging multilayer film having excellent gas permeability and mechanical strength, easily regulating gas permeating quantity, and being effective to maintain the freshness of agricultural products such as fruit and vegetables or flower and ornamental plants. CONSTITUTION: The freshness maintaining multilayer film comprises an intermediate layer of ethylene(meth)acrylic acid-(meth)acrylic ester copolymer or its ionomer, and both front surface layers of polyolefin or ethylene unsaturated ester copolymer. The intermediate layer preferably contains ethylene(meth)acrylic acid-(meth)acrylic ester copolymer of (meth)acrylic acid content of 0.5 to 20wt.%, (meth)acrylic ester content of 10 to 50wt.% or ionomer neutralized at the copolymer by 90mole% or less of neutralization degree, and its thickness is 40 to 95% of the entire thickness.</p> |
