GAS BARRIER LAMINATE HAVING GOOD MOISTURE BARRIER PROPERTIES

• Main Authors: KAWAHARA, NARU, OKUYAMA, SHINPEI, NANGOU, SHUNYA, OBU, YUSUKE
• Format: Patent
• Language: English; French; German
• Published: 17.08.2016
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMPOSITIONS BASED THEREON; DIFFUSION TREATMENT OF METALLIC MATERIAL; GENERAL PROCESSES OF COMPOUNDING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

A gas-barrier laminate 10 of a structure in which a first inorganic barrier layer 3, a water-trapping layer 5 and a second inorganic barrier layer 9 are provided in this order on a plastic base material 1, wherein the water-trapping layer 5 is a layer in which a granular moisture-absorbing agent is dispersed in a matrix of an ionic polymer, the granular moisture-absorbing agent being capable of absorbing moisture to a degree lower than that attained by the matrix, and an organic layer 7 is provided between the water-trapping layer 5 and the second inorganic barrier layer 9, the organic layer 7 serving as an underlying layer for forming the second inorganic barrier layer. The water-trapping layer has excellent barrier property against water and is, at the same time, effectively suppressed from swelling despite it has absorbed moisture. The water-trapping layer is, further, effectively suppressed from losing its activity.