Development of a beer degradation prevention film by the sol-gel method.

Abstract

A beer degradation prevention film has been investigated. SiO2 or ZrO2 films containing inorganic pigment were prepared on the beer bottle surface by the sol-gel method. By heat-treating those films, the thin films have strength against washing by alkali solution (alkali-resistance) and high peel-strength. The film has high transparency and alkali-resistance. The film absorbs light in the range of 450-520nm wavelength and prevents a beer from photo-degradation.