Resin film, metal-coated laminate, and method for manufacturing resin film

Abstract

The purpose of this invention is to provide a resin film that is not prone to clumping even when stored in rolls for extended periods. This invention relates to a resin membrane, which is an elongated resin membrane comprising at least a fluororesin. On at least one surface of the resin membrane, the absorbance ratio A2 of the second peak to the absorbance A1 of the first peak, measured by total reflectance infrared spectroscopy (IR-ATR), is A2 / A1, which is less than 0.006. The first peak is a peak of CF2 symmetric stretching vibration in the wavenumber range of 1130 cm⁻¹ to 1180 cm⁻¹, and the second peak is a maximum peak in the wavenumber range of 1700 cm⁻¹ to 1750 cm⁻¹. The absorbance ratio N2 of the fourth peak to the absorbance N1 of the third peak, measured by nano-infrared spectroscopy (nano-IR), is N2 / N1, which is more than 0.05 and less than 0.5. The third peak is a peak of CF2 symmetric stretching vibration in the wavenumber range of 1130 cm⁻¹ to 1180 cm⁻¹, and the fourth peak is a maximum peak in the wavenumber range of 1600 cm⁻¹ to 1800 cm⁻¹. The maximum peak is below cm⁻¹; the average water contact angle is between 55° and 105°, and the coefficient of variation of the water contact angle is below 30%. (None)