Title:
OPTICAL SHEET MATERIAL
Document Type and Number:
WIPO Patent Application WO/1992/006124
Kind Code:
A1
Abstract:
An optical sheet material preferably used for the optical filter of display units, the substrate of liquid crystal display elements, the substrate of optical recording disks, and optical lenses; having the glass transition temperature and softening point of 130 °C or higher, the flexural elastic modulus of 50 to 1,000 kgf/mm?2¿, the birefringence index of 30 nm or less, the yellowness index of 5 or less, the specific gravity of 1.5 or less, the deflection of 10 mm or less in a load-deflection test, and the thickness of 0.3 to 0.7 mm.
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Inventors:
TANIGUCHI TAKASHI (JP)
TANAKA KAZUO (JP)
ADACHI SHINYA (JP)
MAEKAWA MASAKI (JP)
TANAKA KAZUO (JP)
ADACHI SHINYA (JP)
MAEKAWA MASAKI (JP)
Application Number:
PCT/JP1991/001336
Publication Date:
April 16, 1992
Filing Date:
October 03, 1991
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08G73/12; C08L79/08; G02B1/04; G11B7/2533; G11B7/2536; (IPC1-7): C08F212/36; C08F220/12; C08F222/40; G02B1/04; G11B5/62
Foreign References:
| JPS62177009A | 1987-08-03 | |||
| JPS61103911A | 1986-05-22 | |||
| JPH01215810A | 1989-08-29 |
Other References:
See also references of EP 0503097A1
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