Light diffusion film
AssigneeKimoto Co., Ltd.
InventorsSho Suzuki, Tatsuya Kato, Kazutoshi Tachibana
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Abstract
There is provided a light diffusion film in which a decrease in the half-value angle can be suppressed even after processing with a high elongation rate. A light diffusion film including a base material film and a light diffusing layer, the light diffusing layer containing light diffusing particles and a resin binder, wherein a ratio (T/t) of an average film thickness T of the light diffusing layer, to an average particle diameter t of the light diffusing particles, is 3.0 or more.
Claims10
A light diffusion film comprising a base material film and a light diffusing layer, the light diffusing layer containing light diffusing particles having an average particle diameter t of 0.4 μm or more and a resin binder,
- wherein a ratio (T/t) of an average film thickness T of the light diffusing layer to the average particle diameter t of the light diffusing particles, is 3.0 or more,
- wherein, when the light diffusion film is used for thermoforming, a half-value angle H40 of the light diffusion film at an elongation rate of 40% is within a range of a value 25% lower than a value of a half-value angle H0 before elongation, or more and a value 25% higher than the value of the half-value angle H0 before elongation, or less, and
- wherein an amount of the light diffusing particles loaded is 30% by mass or more and 80% by mass or less based on a total amount of solids in the light diffusing layer.
Dependencies are inferred from the claim text.