... PVC processing aid PVC foaming agent To be used in rigid PVC foamed board,pipe,window,fitting etc Better surface brightness. PVC processing ... the finished product.When it is used as processing aid, it can enhance the melt strength, ... ultra-high viscosityMain ApplicationTo be used in rigid PVC foamed board, pipe, window and fitting, window ... 533JLG ChemPA-930Down river products PVC processing aid;K-400