The root cause of this undesirable phenomenon is that the extension of the strip edge area is out of the elasticity limit of the material.
引起鼓包最根本的原因是带钢边缘延伸超出了该材料的弹性极限范围。
It was also found that both increasing processing temperature and extension rate were favorable to elasticity of PVC melts.
提高PV C材料的加工温度或加快材料的延伸速率，均对提高PV C熔体弹性有利。
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