The sticking point about the problems is the no-slip adhesive shearing extrusion mechanism adopted in normal extrusion and big resistance appears at the interface of die wall and polymer melt.

• 产生以上问题的根源在于传统挤出技术采用非滑移粘着剪切口模挤出方式，使得口模壁面对挤出熔体的阻力大。