Multilayer film made of synthetic resin
AssigneeKuriron Kasei Ltd.
InventorShigeru Tsuji
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Abstract
A multilayer film made of synthetic resin is characterized in that at least one resin layer containing resins which have a poor compatibility with respect to each other and is composed of a mixture of two or more kinds of isomeric resins having a large difference in melting point. The isomeric resins provide easy-to-tear characteristics in a certain direction, where the resins form a numberless phases in certain directions within the resin layers.
Claims3
In a multilayer film comprising at least two resin layers which can be easily torn in one direction, the improvement wherein at least one of said two resin layers consists essentially of (a) polyolefin and (b) at least one member selected from the group consisting of nylon, polystyrene, polycarbonate and ethylene fluoride, which layer has a plurality of phases formed therein in a direction of said film being drawn out by extrusion to exhibit an easy-to-tear characteristic in the vertical direction, said resins (a) and (b), which make up at least one of the resin layers, having different melting points and being essentially incompatible when blended with each other.
Dependencies are inferred from the claim text.