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Patent Searching and Data


Title:
OPTICAL FILMS AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/1998/058789
Kind Code:
A1
Abstract:
Aromatic polycarbonate films having excellent transparency, surface flatness and slidability and suitable for the optical use can be produced by overcoming defects such as scratches, wrinkles and flaws in the steps of producing and processing optical aromatic polycarbonate films by specifying the quality of the roughness on both surfaces thereof and specifying the drying conditions in the drying step after the casting from an aromatic polycarbonate solution in the cast film formation process.

Inventors:
HOSOI MASAHIRO (JP)
NAGOSHI TAMIAKI (JP)
Application Number:
PCT/JP1998/002718
Publication Date:
December 30, 1998
Filing Date:
June 18, 1998
Export Citation:
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Assignee:
TEIJIN LTD (JP)
HOSOI MASAHIRO (JP)
NAGOSHI TAMIAKI (JP)
International Classes:
G06F12/00; B29C39/14; B29D7/01; C08J5/18; G06F13/00; G02F1/1333; (IPC1-7): B29C41/24; C08J5/18; B29C55/06
Foreign References:
JPH08334607A1996-12-17
JPH07299828A1995-11-14
Other References:
See also references of EP 0992331A4
Attorney, Agent or Firm:
Maeda, Sumihiro (Intellectual Property Dept. 1-1, Uchisaiwaicho 2-chom, Chiyoda-ku Tokyo, JP)
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