VAPOR BARRIER FILM, DISPERSION FOR VAPOR BARRIER FILM, METHOD FOR PRODUCING VAPOR BARRIER FILM, SOLAR CELL BACK SHEET, AND SOLAR CELL

• Main Authors: MISHO DAISUKE, HAYASHI HIROMICHI, KAWASAKI KAZUNORI, YOSHIDA MANABU, NAKAMURA TAKASHI, BANDO SEIJI, EBINA TAKEO
• Format: Patent
• Language: English; Korean
• Published: 10.06.2014
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; SEMICONDUCTOR DEVICES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

An object of the present invention is to provide a water vapor barrier film having good flexibility, good moisture resistance, and high mechanical strength. A further object of the present invention is to provide a dispersion for water vapor barrier films which is intended to be used to produce the water vapor barrier film, a method for producing the water vapor barrier film, a solar cell back sheet incorporating the water vapor barrier film, and a solar cell incorporating the water vapor barrier film or the solar cell back sheet. The present invention provided a water vapor barrier film containing: phyllosilicate mineral; and a synthetic resin, wherein the phyllosilicate mineral includes a non-swelling clay mineral and a swelling clay mineral, the phyllosilicate mineral is present in an amount of not less than 30% by weight and not more than 90% by weight of the total weight of the water vapor barrier film, and the water vapor barrier film has a water vapor permeability, measured at 40°C and 90%RH, of not more than 0.5 g/m 2 ·day.