Compare with current high filling blow film of PE and machine penetrating hole film, it has remarkable difference in principle of forming micropore, process-control and use properties.
Blow moulding is a process used to make hollow plastic parts which involves heating the material and then forming it into a mould using air pressure.
吹制模制是一种用来制造中空塑料部件的工艺，将材料加热，然后用空气压力使它在模子中成型。
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The result showed that the crack forming was due to the billet metal in the subcutaneous blow holes were oxidated during heating process and could not be sticked.