UPIA® is a polyimide precursor formed from UBE's proprietary BPDA(Biphenyl tetracarboxylic dianhydride) monomers. This is the original UBE varnish. UBE polyimide film "UPILEX®" is produced using this unique UBE polyimide precursor giving it various and unique advantages. Polyimide coated film derived from the varnish of the same grade has the same properties. UPIA® can be used at any desired concentration by diluting it with anhydrous NMP or DMAc (N, N-dimethylacetamide). UPIA® has superior storage stability compared to conventional polyimide varnishes. It exhibits a very low increase in viscosity at room temperature, while conventional polyimide varnish must be refrigerated or frozen.Information provided by UBE Industries, LTD |