Japan Exlan Company Limited

Mituru Wakitani

Yozo Shiomi

Provided is a wool-like acrylic composite fiber having excellent crimp developability, dyeability and processability, which is characterized in that the difference in the amount of sulfonate groups in the higher and lower heat shrinkable fiber components constituting the fiber is defined to fall within a particular range, that the amount of sulfonate groups in the higher heat shrinkable fiber component is periodically varied within a particular range in the axial direction of the fiber, and that the product of the difference in the amount of sulfonate groups between the higher and lower heat shrinkable fiber components and the ratio of the maximum content of sulfonate groups in the higher heat shrinkable fiber component to the minimum content of the same is defined to fall within a particular range. The composite fiber has a natural hand near to that of natural wool and, when commercially dyed, it has much reduced dyeing specks. The invention can freely design various composite fibers each having a different hand in accordance with the use and the object of fibrous products to be made of such fibers.

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Okayama, Japan

Mituru Wakitani