The results showed that the extrudate with the most smooth surface was obtained when 5 phr of phenolic resin and 50/50 blending ratio of EPDM/PP were used.

• 结果表明，选择酚醛树脂硫化体系、控制酚醛树脂用量为5份以及EPDM／PP共混比为50／50，可以得到挤出表面最为光滑的共混物。