| 摘要 |
Biaxially-oriented nylon film according to the present invention is biaxially-oriented nylon film made from nylon. In the biaxially-oriented nylon film, an elongation ratio of the film in each of four directions (an MD direction, a TD direction, a 45 degree direction and a 135 degree direction) until a film rupture is 70 percent or more, the elongation ratio being measured in a tensile test (testing conditions: a sample width is 15 mm; a distance between gauge points is 50 mm; and a tensile speed is 100 mm/min), and a stress ratio A (sigma1/sigma2) between a tensile stress sigma1 and a tensile stress sigma2 in a stress-strain curve obtained in the tensile test of the film is 2 or more in each of the four directions, the tensile stress sigma1 being a value at a point where the elongation ratio becomes 50 percent while the tensile stress sigma2 being a value at an yield point.
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