pp fiber 基本例句 聚丙烯纤维 In this paper structures and properties of thermal shrinkage PP fiber were studied. 添加改性组分共混纺丝可以进一步提高所得纤维的热收缩性。 dictall The investigation was made on first quality index of raw material PP for producing fine PP fiber in domestic factories. 通过对国内目前所需细旦丙纶原料聚丙烯的质量指标进行调研，制定出相应的质量指标体系。 cnki