Title:
CELLULOSE ACYLATE FILM AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2006/001284
Kind Code:
A1
Abstract:
It is intended to provide a transparent cellulose acylate film exhibiting a negative retardation value in the direction of film thickness industrially at low cost and to, by use thereof as a protective film for polarization plate, or retardation plate or support of retardation plate, provide an excellent liquid crystal display. There is provided a cellulose acylate film characterized in that the cellulose acylate film exhibits a retardation value of < 0 nm in the direction of film thickness, having an acyl substitution degree on cellulose hydroxyls satisfying all of the formulae 2.87 ≤ SA+SP ≤ 3 (A), 0 ≤ SA ≤ 1.7 (B) and 1.3 ≤ SP ≤ 2.9 (C) (in these formulae, SA and SP represent the degree of acyl substitution for cellulose hydroxyls, and SA is an acetyl substitution degree while SP is a propionyl substitution degree), and characterized in that the cellulose acylate film is derived from pulp.
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Inventors:
Sasada, Yasuyuki
Application Number:
PCT/JP2005/011383
Publication Date:
January 05, 2006
Filing Date:
June 21, 2005
Export Citation:
Assignee:
FUJIFILM Corporation (26-30, Nishiazabu 2-chome Minato-ku, Tokyo 31, 10600, JP)
Sasada, Yasuyuki
Sasada, Yasuyuki
International Classes:
C08J5/18; B29C41/24; G02B5/30; G02F1/13363; B29K1/00; B29L7/00; C08L1/12; (IPC1-7): C08J5/18; B29C41/24; G02B5/30; G02F1/13363; B29K1:00; B29L7:00; C08L1:12
Attorney, Agent or Firm:
Oguri, Shohei (Eikoh Patent Office, 7-13 Nishi-Shimbashi 1-chom, Minato-ku Tokyo 03, 10500, JP)
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