While profile, the cross section was composed of annulus and rectangle, was extruded, the flow mechanism the plastic melt in the die was analyzed and the design method of die land was given.
The influences of blending ratios, EPDM's quantity, PP melt - extruded grafting copolymers, unsaturated polar monomers and plasticizer on the mechanical properties of the blends were investigated.
考察了共混比、不饱和极性单体、PP熔体挤出接枝物、增塑剂及EPDM用量对共混物力学性能的影响。
3
Elastic polypropylene hollow fibers were obtained from the blend of polypropylene and paraffin oil which was extruded in melt and then cooled in a high stress field (phase separation occurred).