... ,good quality 2.used in PVC foam board, profile, WPC products and PVC foam shoes. 3.ISO9001:2008 YM-530B is pvc additive developed by our R ... &D center in 2009,which is sepecial for PVC foam board ,WPC products,like PVC foam profile,PVC ... -high melt strength, good fluidity, high viscoelasticity ,good cell structure PVC foam regulator YM-530B