섬유

fibrillation and fibril network formation of polypropylene

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 288
the degree of fibrillation of a polypropylene flat yarn which has undergone high stretching and heat relaxation was found to be more directly representable by the longitudinal tear strength and by the length of the split which developed when the flat yarn was folded at an angle of 180 degrees along the direction of the molecular orientation, than by more fundamental factors, such as the degree of crystallization. the split yarn manufacturing conditions were defined numerically on the bases of those measured data, yielding a direct relation to the degree of fibrillation. the most important points to produce the yarn are to suppress the progressive fibrillation and to make the well-balanced properties by relaxation and heat setting after splitting. these properties include composition of material, the radiant heat for surface treatment, and the stress relaxation. (edited author abstract) in japanese. 7 refs
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