MOISTURE-PROOF FILM FOR ELECTRONIC DEVICES

摘要

Disclosed is a moisture-proof film for electronic devices, in which modified clay crystals are oriented and densely laminated, and the mechanical strength thereof is at a satisfactory level for use as a self-supporting film. The moisture-proof film comprises a modified clay and an additive, has a water vapor barrier property, and a water vapor permeability of less than 0.2 g/m2/day (at 40°C and a relative humidity of 90%), wherein the modified clay is produced by a silylation reaction of a clay, the additive is a polyamide or a polyimide, and lithium ions make up at least 90 mol% of exchangeable ions in the modified clay. The moisture-proof film is a novel material that fulfils all of the requirement of weather resistance, gas barrier performance, water vapor barrier performance, flexibility, heat resistance, electrical insulation performance, and water resistance.