B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/1000, 18/103,
B29D 11/00 (2006.01) B29D 7/01 (2006.01) C08J 5/18 (2006.01) G02B 5/30 (2006.01) G02F 1/13363 (2006.01)
Patent
CA 2006662
ABSTRACT OF THE DISCLOSURE An optical film having high optical uniformity is disclosed, including a thermoplastic resin film having no periodic thickness variation of sine waveform having a pitch of 50 mm or less and a thickness change of 0.5 µm or more on continuous thickness measurement in the machine direction, and an optical film having a retardation value of 1200 nm or less with a fluctuation of not more than 10% and a rate of change of not more than 1.3 %/cm, which is obtained by stretching said thermoplastic resin film. The optical film is laminated on a polarizing sheet to serve as a phase retarder.
Nakamura Kimishige
Okada Toyokazu
Sakakura Kazuaki
Riches Mckenzie & Herbert Llp
Sumitomo Chemical Co. Ltd.
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