Method for manufacturing transparent polyimide film
AssigneeTaimide Tech. Inc.
InventorWen-Hsuan Chung
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Abstract
The instant disclosure relates to a method for manufacturing a transparent polyimide film, including providing a polyamic acid solution having a fluorine content more than 12%; adding a dehydrating agent and a catalyst into the polyamic acid solution, the dehydrating agent having an equivalent number equal to or larger than 3; and baking the polyamic acid solution under a temperature ranging from 250 to 350° C. for performing a chemical imidization process so that the transparent polyimide film is obtained. The transparent polyimide film has an elongation rate of more than 30% and a b* value in a CIELAB coordinate of less than 3.5.
Claims7
A method for manufacturing a transparent polyimide film, comprising:
- providing a polyamic acid solution having a fluorine content more than 12%, and the polyamic acid solution including 4,4′-(4,4′-isopropylidenediphenoxy)bis-(phthalic anhydride);
- adding a dehydrating agent and a catalyst into the polyamic acid solution, the dehydrating agent having an equivalent number equal to or larger than 3;
- performing a chemical imidization process to form a polyimide solution;
- and
- baking the polyimide solution under a temperature ranging from 250 to 260° C. so that the transparent polyimide film which has a b* value in a CIELAB coordinate of less than 1.3 is obtained.
Dependencies are inferred from the claim text.