Title:
HIGHLY MOISTUREPROOF FILM AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2005/037898
Kind Code:
A1
Abstract:
A film comprising at least a polyvalent metal salt of polycarboxylic polymer (A) that has a density of 1.80 g/cm3 or higher and exhibits an area ratio (&agr ) of infrared absorption spectrum [peak area S1(3700 to 2500 cm-1)/peak area S2(1800 to 1500 cm-1)] of 2.5 or less and an area ratio (β) of infrared absorption spectrum [peak area A1(1560 cm-1)/peak area A2(1700 cm-1)] of 1.2 or more, namely, a film with high oxygen gas barrier capability and moisture resistance can be provided by conducting coating with a solution containing polycarboxylic polymer (A) and polyvalent metal compound (B) and heat treating the resultant dry film under specified conditions. As a result, there can be provided packages of not only food whose contact with oxygen gas is unfavorable but also food, drink, chemicals, medicines and precision metal parts such as electronic components whose contact with moisture is unfavorable, packaging containers therefor and electronic equipment members.
Inventors:
Yamasaki, Masahiro c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Inaba, Yusaku c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Tanaka, Hideaki c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Inaba, Yusaku c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Tanaka, Hideaki c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Application Number:
PCT/JP2004/015758
Publication Date:
April 28, 2005
Filing Date:
October 19, 2004
Export Citation:
Assignee:
KUREHA CORPORATION (3-3-2, Nihonbashi-Hamacho Chuo-ku, Tokyo, 103-8552, JP)
Yamasaki, Masahiro c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Inaba, Yusaku c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Tanaka, Hideaki c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Yamasaki, Masahiro c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Inaba, Yusaku c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
Tanaka, Hideaki c/o Packaging Materials Reserch Laboratories (Kureha Corporation 18-13, Oaza Kamitamari, Tamari-mur, Niihari-gun Ibaraki, 311-3436, JP)
International Classes:
C08J5/18; B29C41/12; C08L33/02; B29K33/00; B29L7/00; (IPC1-7): C08J5/18; B29C41/12; C08L33/02; B29K33/00
Attorney, Agent or Firm:
Nagahama, Noriaki (Nagahama International Patent Firm, 8th Floor Muraki Bldg., 2-10-10, Yaes, Chuo-ku Tokyo, 104-0028, JP)
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