WATER VAPOR TRANSMISSION RATE EVALUATION METHOD, WATER VAPOR TRANSMISSION RATE EVALUATION SYSTEM, AND GAS BARRIER FILM PRODUCTION METHOD

摘要

The present invention addresses the problem of providing a non-destructive, non-contact water vapor transmission rate evaluation method for a gas barrier film that makes it possible to calculate the water vapor transmission rate for the entirety of a gas barrier film having a gas barrier layer. Further, the invention also addresses the problems of providing a water vapor transmission rate evaluation system and a gas barrier film production method that use said water vapor transmission rate evaluation method. The water vapor transmission rate evaluation method according to the present invention is a water vapor transmission rate evaluation method for evaluating the water vapor transmission rate of a gas barrier film (F) on the basis of the layer thickness and refractive index of a gas barrier layer (F4) of the gas barrier film (F) and is characterized by the inclusion of a measurement step for measuring the layer thickness and refractive index of the gas barrier layer (F4) and a water vapor transmission rate calculation step for calculating the overall water vapor transmission rate of the gas barrier film (F) within a measurement range.