Protective film of a polarizing plate
AssigneeKonica Corporation
InventorsKunio Shimizu, Toru Kobayashi
Life of this patent
Estimating the term…
Abstract
A protective film of a polarizing plate comprising a cellulose ester film, wherein a variation in a weight of the cellulose ester film is 0 to 2% under a keeping condition of 80±5° C. and 90±10% RH for 48 hours.
Claims4
A protective film of a polarizing plate comprising a cellulose ester film, wherein a variation in a weight of the cellulose ester film is 0 to 2% under a keeping condition of 80±5° C. and 90±10% RH for 48 hours, and wherein the cellulose ester film contains a plasticizer selected from the group consisting of rosin, rosin derivatives, epoxy resins, ketone resins and p-toluenesulfonamide resins in an amount of 1 to 30 weight % of the cellulose ester film.
Dependencies are inferred from the claim text.