摘要:
A cellulose acylate solution which comprises a substantially chlorine-free solvent and a cellulose acylate dissolved therein. The substantially chlorine-free solvent is a mixed solvent comprising a ketone having a solubility parameter of 19 to 21 and an ester having a solubility parameter of 19 to 21. The cellulose acylate solution further contains a release agent.
摘要:
Preparation of cellulose acylate film comprises co-casting cellulose acylate solution to form two or more layers of extending film, wherein the associate molecular weight of the outer layer by static light scattering is lower than that of the inner layer.
摘要:
An optical filter having a filter layer absorbing a visible light, a transparent supporter, in particular a transparent supporter comprising a biaxially stretched film, and antireflection layer, characterized in that it has at least one filter layer containing a coloring matter and a polymer binder on at least one side of the transparent support and has an antireflection layer having the antireflection ability for a visible light on the side of the supporter opposite to the filter layer when it has a filter layer only on one side of the supporter, or on either side of the supporter when it has filter layers on both sides, wherein the transparent supporter is a biaxially stretched film having a thickness of 10 mu m to 500 mu m. The optical filter is attached to an image display device such as a plasma display for the purpose of the prevention of reflection and the correction of color reproduction.
摘要:
A cellulose acylate which is a polymer obtained by substituting cellulose with acyl groups in 2-, 3-, 6-positions. The total degree of acyl substitution in the 2-and 3-positions is regulated to from 1.70 to 1.90. The degree of 6-position acyl substitution is regulated to 0.88 or higher.