The present invention has better ventilation and pollution property than the single-layer hot meltfilm material;
本发明比单层的热熔膜材料具有更优的 通气污染性；
2
However after vibration intensity reached a limit value, melting rate, thickness of meltfilm and melting length would remain unchanged.
当振动强度达到某一极限值后，熔融速率、熔膜厚度和熔融段长度不再随振动参数的变化而变化。
3
The potential USES of high melt strength polypropylene in the field of extrusion foaming, thermoforming, extrusion coating and blown film were also introduced.