FLUORORESIN FILM OF HIGH MECHANICAL STRENGTH

摘要

PROBLEM TO BE SOLVED: To provide a fluororesin film of a high mechanical strength wherein a tensile breaking strength and a tensile elastic modulus are improved in comparison with traditional ones. SOLUTION: A fluororesin film wherein a dielectric constant is <=5 and tensile breaking strength in an MD direction and in a TD direction are respectively >=40 MPa; a fluororesin film wherein ratios of tensile breaking strengths in the MD direction and in the TD direction after stretching to tensile breaking strengths in the MD direction and TD direction before stretching are respectively >=1.5; and a fluororesin film of a high mechanical strength wherein tensile elastic moduli in the MD direction and in the TD direction are respectively >=3000 MPa are respectively provided.