Five factors that affect the quality of PVC advertising boards and six common problems, causes and solutions?
Five factors that affect the quality of PVC advertising boards and six common problems, causes and solutions? 1. Five factors of quality In the extrusion process of PVC foam board, the problems encountered can be basically classified into five categories. One is stability problems; the other is melt strength problems; the third is lubrication problems; and the fourth is dispersion proble