PVC Foaming Modifier YFG-530 ( Grade: P-530 ) is a kind of multi'layer structure of ultra' ... high molecular polymer. 1. IntroductionPVC Foaming Modifier YFG-530 ( Grade: P-530 ) is a kind of multi-layer structure of ultra ... replace the competitor's LP-21, K-125, PA-40, P-530, K-400 etc. PVC Foaming Regulator - YFG-530B Grade ...