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Patent Searching and Data


Title:
WATER VAPOR BARRIER FILM AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2011/152500
Kind Code:
A1
Abstract:
Disclosed are: a film for a solar cell back sheet, which has excellent water vapor barrier properties, water resistance and gas barrier properties, while having adequate flexibility, adequate mechanical strength and excellent thermal stability; and a method for producing the film for a solar cell back sheet. Specifically disclosed is a water vapor barrier film which is obtained by coating a PET base with a clay film. The water vapor barrier film is characterized in that: the clay film is configured of clay and an additive; the weight ratio of the clay relative to the total solid is 60-90% by weight in the clay film; the production procedure thereof comprises a water resistance-imparting heat treatment that is carried out at 100-200°C after coating and drying steps; the water vapor barrier film has a water vapor transmission rate of less than 3 g/m2/day; the additive of the modified clay is a polyimide; and 90% by mole or more of the exchangeable ions are lithium ions. Also specifically disclosed is a method for producing the water vapor barrier film. The film has water vapor barrier properties and is useful as a back sheet for a solar cell or the like.

Inventors:
EBINA, Takeo (National Institute of Advanced Industrial Science and Technology 2-1, Nigatake 4-chome, Miyagino-ku, Sendai-sh, Miyagi 51, 〒9838551, JP)
蛯名 武雄 (〒51 宮城県仙台市宮城野区苦竹四丁目2番1号 独立行政法人産業技術総合研究所東北センター内 Miyagi, 〒9838551, JP)
IWATA, Shinichi (National Institute of Advanced Industrial Science and Technology 2-1, Nigatake 4-chome, Miyagino-ku, Sendai-sh, Miyagi 51, 〒9838551, JP)
Application Number:
JP2011/062735
Publication Date:
December 08, 2011
Filing Date:
June 02, 2011
Export Citation:
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Assignee:
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY (3-1 Kasumigaseki 1-chome, Chiyoda-ku Tokyo, 21, 〒1008921, JP)
独立行政法人産業技術総合研究所 (〒21 東京都千代田区霞が関一丁目3番1号 Tokyo, 〒1008921, JP)
EBINA, Takeo (National Institute of Advanced Industrial Science and Technology 2-1, Nigatake 4-chome, Miyagino-ku, Sendai-sh, Miyagi 51, 〒9838551, JP)
蛯名 武雄 (〒51 宮城県仙台市宮城野区苦竹四丁目2番1号 独立行政法人産業技術総合研究所東北センター内 Miyagi, 〒9838551, JP)
International Classes:
B32B9/00; C01B33/40; H01L31/042
Attorney, Agent or Firm:
SUDO, Masahiko (Shinyo Bldg. 6F, 6-1 Nihonbashi-Muromachi 1-chome, Chuo-k, Tokyo 22, 〒1030022, JP)
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Claims: