... to our drawing or OEM. Techincal Advantages of PVC extrusion double screw and barrrel/parallel twin screw and barrel :1.Advanced ... glass fiber, mineral fiber and PPA,PPS, PA6T, LCP,VO fire protection, ferrous power, magnetic powder and etc. Meanwhile,Used for ... + 30% CaCo3, recylced plastic material,etc co-rotating PVC extrusion double screw and barrrel/parallel twin screw and barrel DiameterΦ15mm ...