Mould name: P - 201 packing paper tube（paper tube body，top cap，bottom cap and the extrusion nozzle）.
1：模具名称：P-201包装用纸管（纸管本体，上盖，下盖，挤出嘴）。
2
The production method includes the processes of arraying filament, compound extrusion, cooling and sizing, drying, marking traction as well as taking in and packing.
其生产工艺包括排丝、挤压复合、冷却定型、干燥、标识牵引以及收卷包装的过程。
3
In order to solve the problem concerning the contact-sealing theory for the common packing element, the design theory of "complete anti-extrusion" is put forward.