Heat-shrinkable multilayer film
AssigneeKureha Corporation
InventorsShota Nambu, Ichiro Kitada
Life of this patent
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Abstract
Provided is a heat-shrinkable multilayer film having high strength and excellent followability to its contents. The heat-shrinkable multilayer film according to the present invention is composed of at least three layers of a surface layer (a) including a thermoplastic resin; an intermediate layer (b) including a polyamide-based resin; and a surface layer (c) including a sealable resin. (A) The load per unit width at 10% elongation is 0.70 N/mm or less in both a longitudinal direction (MD) and a transverse direction (TD) in a tensile test at 90° C. (B) The puncture strength per unit thickness is 0.200 N/μm or greater.
Claims3
A heat-shrinkable multilayer film comprising at least three layers of:
- a surface layer (a) comprising a thermoplastic resin;
- an intermediate layer (b) comprising a polyamide-based resin;
- and a surface layer (c) comprising a sealable resin, wherein,
- (A) a load per unit width at 10% elongation is 0.70 N/mm or less in both a longitudinal direction (MD) and a transverse direction (TD) in a tensile test at 90° C.,
- (B) a puncture strength per unit thickness is 0.200 N/μm or greater,
- (C) a shrinkage rate in hot water at 90° C. is 20% or more and 33% or less in both the longitudinal direction (MD) and the transverse direction (TD), and
- (D) a thickness of the intermediate layer (b) is 15 μm or greater and 50 μm or less.
(canceled)
Dependencies are inferred from the claim text.