... we are factory of specificational manufacturing of pvc resin for 30 yeas,we can product pvc resin 50,000 tons one year ... size 105-75 °C, compared with other common plastics, PVC is fire retardant and self-extinguishing characteristics of nature, with ... the ethers, ketones and aromatic hydrocarbons to swelling or dissolution. PVC resin, the stability of the appearance of white powder, particle ...