| 摘要 |
PROBLEM TO BE SOLVED: To suppress an instrumental pollution at extrusion molding and improve the transparency of resin by a method wherein the specified ratios of metal salt of rosin, tertiary amine type light stabilizer and aromatic phosphite and/or aromatic phosphonite-based anti-oxidant are moxed to propylene resin. SOLUTION: To 100 pts.wt. of propylene resin, 0.03-2 pts.wt. of metal salt of rosin, 0.01-1 pts.wt. of tertiary amine type light stabilizer and 0.01-0.5 pts.wt. of aromatic phosphite and/or aromatic phosphonite anti-oxidant the blended in order to get a resin composition by means of a mixer and a kneader normally used. As the propylene resin, one having the melt flow rate of 0.1-50g/10min is suitable from the view point of the fluidity at extrusion molding and the mechanical strength of a body. Thus, an instrumental pollution can be suppressed at extrusion molding and, at the same time, the transparency of the resin, its hue and its heat aging resistance are improved. |
