The second stage is SJ single screw extruder .Because of the lower rotate speed , it can complete melting ,compounding lengthways and forming strands avoiding over heating.

• 第二阶为SJ 系列单螺杆挤出机．螺杆长径比短，可在低剪切状态下完成塑化和纵向混合及稳定的挤出造粒，避免过热分解。