En-Door Polymer Additives Co., Ltd. was founded in 1987 by name of "Nanxing" in early period. Our company is one of the largest manufacturers of Polymer Additives in China and is specializing in the research, development and manufacture of PVC additives, including PVC heat stabilizers, PVC processing aids, PVC impact modifiers, PVC lubricants, etc. En-door has 2661 staff members, including 156 researchers. We have two R&D centers. Our company is located in Yichang City, near the Three Gorges Dam. It takes 30 minutes' drive to Yichang Airport. After 20 years' fast development, we have got "the State Scientific & Technical Achievement Award". Our products have been entitled as "Consumers Satisfactory Products" by the government. History of En-Door 1987.11 - Foundation of Chemical General Factory in Nanxing, Hubei Technical cooperation with