As compared with PP fiber , the orienta - tion degree of the modified PP fiber almost remained unchanged and the crystallinity was increased in some degree but decreased when the content of nano-calcium carbonate was not less than 2 % .
与PP纤维相比，改性PP纤维的取向度变化不大，结晶度有所提高，但当纳米碳酸钙质量分数大于等于2%时，其结晶度下降明显。
orienta