Method of fiber scouring with supercritical carbon dioxide
AssigneeIndustrial Technology Research Institute
InventorsWen-Fa Lin, Chi-Ying Hung, Jing-Wen Tang, Tien-Szu Hsieh
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Abstract
A method of removing spinning and finishing oils from fibers using supercritical carbon dioxide as an extraction media is provided. This process using carbon dioxide to remove oils from fiber surface operates at moderate pressures between 90 and 350 bar and at temperature levels ranghng from 40 to 120° C. The treated fibers have improved strength and elongation properties compared to those treated by conventional scouring. The treated fibers can be directly subjected to the subsequent dyeing processing.
Claims9
An improved method of scouring fibers having an oil content of about 1.2 to 2.5% by weight of the fibers, which comprises:
- flowing carbon dioxide through the fibers under pressure and temperature conditions such that the carbon dioxide is a supercritical fluid, thereby removing a substantial portion of the oil content from the fibers,
- wherein said fibers, upon being scoured, have retained tensile strength and improved elongation.
Dependencies are inferred from the claim text.