| 摘要 |
An optical sheetlike article possessing a glass transition point and a softening point both higher than 130 DEG C., a modulus of elasticity when bent of more than 50 kgf/mm2, a double refraction index not greater than 30 nm, a yellowness index of not greater than 5, a specific gravity of not more than 1.5, an amount of deflection of not more than 10 mm in a load flexure test, and a thickness of more than 0.3 mm and not more than 0.7 mm is provided, and is ideal for use in optical filters for display devices, substrates for liquid crystal display devices, substrates for optical recording discs, and optical lenses, among others.
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