Method for manufacturing polyamide-based coated film, laminate and polyamide-based coated film

摘要

PROBLEM TO BE SOLVED: To provide a polyamide-based coat film which is excellent in uniformity of thickness, effectively suppresses variation in physical properties in four directions, and also improves resistance against an electrolyte.SOLUTION: A polyamide-based coating film has a protective layer containing an acid-modified polyolefin resin on at least one surface of a polyamide-based film, and satisfies the following (1) and (2): (1) a difference between the maximum value and the minimum value of each stress at the time of 5% elongation in uniaxial tension test in four directions of 45 degrees, 90 degrees and 135 degrees in a clockwise direction to 0 degree being a specific direction from an arbitrary point in the coat film is 35 MPa or less; and (2) a difference between the maximum value and the minimum value of each of the stresses at the time of 15% elongation in uniaxial tensile test in the four directions is 40 MPa or less.SELECTED DRAWING: Figure 4