Through the experiment of PVC-U profile formula of the change of the composition such as calcium car-bonate,ACR,formula of lubricating balance and adj ust the same formulation under different process,this paper calcu-lated the impact angle of welding strength profile of PVC-U key points.%通过实验对PVC-U型材配方中碳酸钙、ACR 等成分的变化，配方体系中的润滑平衡以及同一配方下不同工艺调整，从而得出影响PVC-U型材焊角强度的关键点。
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