Shangdong Wanbang New Materials Co., Ltd. is a joint-stock enterprise specializing in the production and processing of C5 petroleum resin, C5 hydrogenated petroleum resin, C9 petroleum resin, c5 hydrocarbon resin，copolymer petroleum resin, road sign resin, and paint ink resin. It is a joint-stock enterprise specializing in the production and processing of C9 solvent, coumarone, rubber softener, -80 resin, copolymer resin, road sign paint resin, ink resin and other p...