| 摘要 |
PROBLEM TO BE SOLVED: To provide a film having good concealing property and a small difference between the maximum and the minimum of optical density in a width direction of a film roll.SOLUTION: A biaxially oriented white polyamide film is provided, which comprises 5 to 25 mass% of a non-crystalline polyamide and 5 to 50 mass% of titanium oxide as well as 25 to 90 mass% of a crystalline polyamide and satisfies the following requirements (1) to (3). (1) The film has an optical density (OD value) of 0.30 or more; (2) a difference between the maximum and the minimum of the optical density (OD value) in a width direction of the oriented film roll is 0.05 or less; and (3) the film has a tensile strength of 180 MPa or more both in a machine direction and in the width direction. |
