1) It is the main material of High temperature polyimied film, resin, engineering plastic as bellows: Polyimide, polyether imide, polyester imide, a polymaleimide, poly aryl amide 2) Yinto ye-3,3, i-4,4'-TethaimoniphheHnyli, entshukumo enkulu yothotho lwe-heterocyclic yobushushu be-polymeric I-3) Yinto yokuthintela ubushushu obuphezulu be-epoxy resin, ipoliyo kunye nezinye izinto zepolymer kunye ne-arhente enqamlezileyo.