Vapor barrier film, dispersion for vapor barrier film, method for producing vapor barrier film, solar cell back sheet, and solar cell

摘要

The purpose of the present invention is to provide a vapor barrier film having excellent pliability and humidity resistance and high mechanical strength. Moreover, the purpose of the present invention is to provide a dispersion for a vapor barrier film used in the production of the vapor barrier film, a method for producing the vapor barrier film, a solar cell back sheet obtained using the vapor barrier film, and a solar cell obtained using the vapor barrier film or solar cell back sheet. The present invention is a vapor barrier film containing a stratified silicate mineral and a synthetic resin, wherein the vapor barrier film contains a non-swelling clay mineral and a swelling clay mineral as the stratified silicate mineral, the content of the stratified silicate mineral is between 30 wt% and 90 wt%, and the moisture permeation rate under an environment of 40ºC and 90% RH is 0.5 g/m