En-Door Polymer Additives Co.Ltd, formerly named "Nanxing"was founded in 1987. The company is one of the largest manufacturers in China that specializes in researching, developing and manufacturing of PVC auxiliary, including PVC heat stabilizers, PVC processing aids, PVC impact modifiers and PVC lubricants etc. En-Door has more than 2500 employees, including two R&D centers with 156 people. It is located in the city of Yichang near the Three Gorges Dam, and it is a half an hour drive from the ...