Standard film for calibration of water vapor transmission rate measuring apparatus and manufacturing method thereof, standard film set for calibration and calibration method using the same

摘要

The object of the present invention is applicable to many water vapor permeability measuring devices without the need for a dedicated connection, and is a calibration standard sample that can be calibrated with the same mounting mechanism and measurement conditions as a normal film sample. Is to provide. Another object of the present invention is to correct the WVTR value by using a plurality of calibration standard samples, so that, for example, it is possible to cancel the change in water vapor permeability caused by the physical properties of the adhesive used for bonding. A standard film set for calibration and a calibration method are provided. The calibration standard film 10 according to the present invention includes a barrier layer 12 on a resin film 11, the barrier layer 12 has at least one small hole 13, and water vapor permeability of 10 −3 g / m 2 / day or less. Is a standard film for calibration of a water vapor transmission rate measuring apparatus, where R / L ≦ when the equivalent circle radius of the small hole 13 is R [μm] and the thickness of the resin film 11 is L [μm]. 5.