Laminated film and method for manufacturing same
AssigneeUnitika Ltd.
InventorsTakashi Okabe, Nobuyasu Okumura, Kumi Ashihara
Life of this patent
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Abstract
A laminated film having a resin layer laminated on at least one surface of a base film. The laminated film is characterized by: the base film being a semi-aromatic polyamide film that has been at least uniaxially stretched; the resin layer containing fine particles; the thermal shrinkage factor in the longitudinal direction SMD and the thermal shrinkage factor in the width direction STD of the film measured under conditions of 250° C.×5 minutes each being −1.0 to 1.5%; the tensile elongations at break in the longitudinal direction and in the width direction each being 70% or more; and the haze being 3% or less.
Claims9
A laminated film having a resin layer laminated on at least one surface of a base film, wherein:
- the base film is a semi-aromatic polyamide film that has been at least uniaxially stretched;
- the semi-aromatic polyamide is made of a dicarboxylic acid component consisting of terephthalic acid (100 mol % of terephthalic acid) and a diamine component containing 60 to 100 mol % of 1,9-nonanediamine and 2-methyl-1,8-octanediamine in total in the diamine component;
- the resin layer contains first fine particles with an average particle diameter of 0.3 μm to 4.0 μm and second fine particles with an average particle diameter of 0.01 μm to 0.2 μm;
- a thermal shrinkage factor in a longitudinal direction SMD and a thermal shrinkage factor in a width direction STD of the film when treated under conditions of 250° C.×5 min are each −1.0 to 1.5%;
- tensile elongations at break in the longitudinal direction and in the width direction are each 70% or more;
- and
- a haze is 3% or less.
Dependencies are inferred from the claim text.