成型收缩率（Molding Shrinkage）是指塑件自模具中取出冷却到室温后，室温尺寸的缩小值对其原未冷却尺寸的百分率。
成型收缩率 (Mold shrinkage) 就是聚合物在成型冷却后的收缩，通常以百分比为单位。是这通常用于制造注塑模具的加工参数，从而获得成型后的理想尺寸。
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线成型收缩率 Molding shrinkage
Wollastonite was coated by RETM and then it was put into PA6. The influences of RETM on the tensile strength, impact strength, abrasion resistance, water absorption and shrinkage of mould for PA6 were studied.
采用马来酸单酯稀土(RETM)对硅灰石表面进行包覆后用于尼龙6(PA6)的改性,研究了RETM对改性PA6的拉伸强度、缺口冲击强度、耐磨损性能、吸水性及成型收缩率等的影响。
参考来源 - 马来酸单酯稀土包覆硅灰石改性PA6的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
此外还介绍了成型收缩率的评价方法。
成型收缩率小，尺寸稳定性好，熔体粘度小，易成型加工。
Molding shrinkage of small, good stability, melt viscosity size is small, easy forming process.
本工作采用试验与数值模拟相结合的研究方法，对玻璃纤维增强聚丙烯系列材料的成型收缩率进行了深入研究。
Therefore, the shrinkage of the glass fiber reinforced polypropylene specimens prepared by injection was investigated with the combination of the experiments and the simulation.
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