FILM AND PRODUCING METHOD THEREFOR

摘要

A film or laminate which comprises a polycarboxylic acid polymer and a compound of a polyvalent metal, serves as an excellent barrier to gases, e.g ., oxygen, and has such resistance that the appearance, shape, and gas-barrier properties are not impaired by neutral water, high-temperature water vapor, or hot water; and a process for industrially easily producing the film or laminate at low cost. The film or laminate is suitable for use as a package, packaging container, or vacuum insulation material for articles which are ap t to be deteriorated by oxygen, etc., such as foods, beverages, chemicals, medicines, and metallic precision parts, e.g., electronic parts. Furthermore , a packaging material can be provided therefrom which is suitable for use for articles which are required to be stably insulated from gases over long and should be treated under high-temperature hot-water conditions as in boiling or retortion sterilization.