Biaxial stretching nylon film for cold forming, being the lamination wrapping material and biaxial stretching nylon film for cold forming which designates

摘要

PROBLEM TO BE SOLVED: To provide a biaxially stretched nylon film which is excellent in moldability, strength and pinhole resistance for a major raw material for a cold-molded packaging material, a laminated packaging material including the film, and a forming method of the biaxially stretched nylon film.;SOLUTION: The biaxially stretched nylon film is formed of nylon 6. An elongation ratio to fracture is 70% or higher in 4 directions (MD direction, TD direction, 45° direction and 135° direction) in a tensile test (specimen width 15 mm, gauge length 50 mm and tensile speed 100 mm/min). When σ₁ is defined as tensile stress at the elongation ratio of 50% and σ₂ as the tensile stress at an yield point in a stress-strain curve in the tensile test, all of the stress ratios A (σ₁/σ₂) in the 4 direction are not smaller than 2.;COPYRIGHT: (C)2008,JPO&INPIT