Optical film, shaping film, method for manufacturing optical film, and method for manufacturing stretched film
AssigneeZeon Corporation
InventorsHyota NAKAHORI, Shunsuke YAMANAKA
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Abstract
The present invention provides an optical film containing an additive. The optical film includes a high concentration portion containing the additive, and a low concentration portion containing the additive at a concentration lower than the high concentration portion. The low concentration portion is provided on both sides of the high concentration portion in a thickness direction of the optical film, and the low concentration portion is provided on both sides of the high concentration portion in a width direction of the optical film.
Claims15
An optical film containing an additive, comprising:
- a high concentration portion containing the additive;
- and a low concentration portion containing the additive at a concentration lower than the high concentration portion, wherein
- the low concentration portion is provided on both sides of the high concentration portion in a thickness direction of the optical film, and
- the low concentration portion is provided on both sides of the high concentration portion in a width direction of the optical film.
A method for producing an optical film, comprising the step of extruding a thermoplastic resin A containing an additive and a thermoplastic resin B containing the additive at a concentration lower than the thermoplastic resin A into a film shape from a die filled with a layer of the melted thermoplastic resin A and a layer of the melted thermoplastic resin B, the melted thermoplastic resin B being provided on both sides in a thickness direction and both sides in a width direction of the layer of the thermoplastic resin A.
Dependencies are inferred from the claim text.