Delustrant Composed of Polyimide Powder, Polyimide Film Incorporating The Delustrant, and Manufacture Thereof
AssigneeTaimide Technology Incorporation
InventorsChung-Yi Chen, Sheng-Yu Huang, Wei-Dun Jhuang
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Abstract
A polyimide film with low gloss comprising a polyimide base polymer constituting the film, and a polyimide powder distributed in the film, the polyimide film having a 60° gloss value smaller or equal to about 50. The polyimide powder used as delustrant can have an average particle size between about 0.5 μm and about 15 μm. Embodiments described herein also include methods of preparing the polyimide film and the delustrant.
Claims17
A polyimide film comprising:
- a polyimide base polymer forming a main molecular structure of the film, the polyimide base polymer being obtained by reacting diamine with dianhydride components in substantially equal molar ratio;
- and
- about 5 wt % to about 10 wt % of a polyimide powder distributed in the film;
- wherein the film has a 60° gloss value less than or equal to about 50.
A method for preparing a polyimide film, comprising:
- performing condensation polymerization of monomers including a diamine and a dianhydride to obtain a solution containing polyamic acid;
- adding a polyimide powder into the solution;
- adding a dehydrant and a catalyst into the solution to obtain a precursor solution;
- coating a layer of the precursor solution on a support;
- and
- baking the layer coated on the support to form a polyimide film;
- wherein the polyimide powder is distributed in the polyimide film, and the film has a 60° gloss value less than or equal to about 50.
A method of preparing a polyimide powder, comprising:
- adding a diamine and a dianhydride at a molar ratio of about 1:0.950 to 1:0.995 into a solvent to obtain a reaction solution, wherein the sum of the diamine and the dianhydride has a weight ratio between about 2 wt % and about 20 wt % of the total weight of the reaction solution;
- adding a dehydrant and a catalyst into the reaction solution to obtain a mixture;
- and
- heating the mixture to obtain a precipitate of polyimide.
A polyimide powder having an average particle size between about 2 μm and about 10 μm, the polyimide powder being obtained by reacting 4,4′-oxydianiline (4,4′-ODA) with pyromellitic dianhydride (PMDA).
Dependencies are inferred from the claim text.