Comparison the structure of PVC foams with different additives

The effects of various types of fillers in the PVC structure can be determined by using Scanning Electron Microscope. By the results of microscope, the modifying effects of fillers can be examined. Due to the most common failures which can occur in the production detected from the records. At different dose of fillers the structural changes were examined. The results of SEM analysis show that the most common structural failure was caused by the mixing preparation (especially for CaCO3 blends). The types of fillers influence the shape-, orientation- and open-close of foam cells. Adding fillers of different percentage changes the thickness of the cells walls and the size and orientation of the cells. Based on these tests, it is possible to determine which filler is the most suitable for the formation of regular cellular structure.