CHEESE-LIKE PACKAGE OF HIGHLY CRIMPABLE CONJUGATED FIBER AND PROCESS FOR THE PRODUCTION OF THE SAME

摘要

A cheese-like package of highly crimpable conjugated fiber obtained by laminating a paper tube with a conjugated fiber consisting of a group of single yarns obtained by joining, side by side, polytrimethylene terephthalates different in intrinsic viscosity which each comprise at least 90 % by mole of trimethylene terephthalate units and at most 10% by mole of other ester repeating units, characterized by satisfying the following requirements (1) to (4): (1) the crosssectional shape of the single yarn constituting the conjugated fiber is a flat one having a flatness (ratio of major axis to minor axis) of 1.1 to 3, (2) the apparent stretch elongation of the conjugated fiber is 30 to 200%, (3) the contact area (pressure reception area) (S cm²) between the paper tube and the conjugated fiber and the winding weight (W kg) satisfy the relationship of formula (1): 2 < W < 0.02S (1) with the proviso that 240 < S < 1000, and (4) the winding density of the cheese-like package is 0.92 to 1.05g/cm³.