Strip dyeing method for corn fibers

Abstract

The invention relates to a strip dyeing method for corn fibers. The method comprises the following processes of: 1, dyeing, namely filling the corn fiber strips into a dye vat, rotating the dye vat, adding polyol ester liquid into the dye vat, rotating the dye vat, adding a carrier, namely polyolefin elastomer (POE) liquid, into the dye vat, rotating the dye vat, adding univadine diiodofluorescein (DIF) into the dye vat, rotating the dye vat, adding univadine DPS into the dye vat, rotating the dye vat for minutes, adding a disperse dye, namely Terasil sulfadiazine (SD), into the dye vat, rotating the dye vat, starting to raise the temperature to 70+ / -2 DEG C at the temperature rise speed of 1.5 to 2 DEG C per minute, raising the temperature to 90+ / -2 DEG C by keeping the temperature rise speed at 1 DEG C per minute, keeping the temperature for 10 seconds, raising the temperature to 110+ / -2 DEG C at the temperature rise speed of 1 DEG C per minute, keeping the temperature for 20 to 30 minutes, lowering the temperature to 50+ / -2 DEG C at the temperature descent speed of 2 DEG C per minute, and discharging the liquid; and 2, performing post treatment, namely adding the dyed corn fiber into the dye vat, adding soaping liquid 209, sodium bicarbonate and sodium hydrosulfite into the dye vat, raising the temperature to between 60 and 65 DEG C, keeping the temperature for 15 to 20 minutes, and discharging the liquid. The homochromatism, the dyeing uniformity and the stability of dyeing are improved by the method; the dyeing effect is good; and the color fastness is good. The injury to the fibers in the dyeing process is low.

Description

technical field [0001] The invention relates to a selection of dyestuffs for corn fiber strip dyeing, selection of auxiliary agents corresponding to dyeing in the dyeing process, and matching dyeing and post-treatment processes. It belongs to the technical field of fiber dyeing. Background technique [0002] Corn fiber is an alias of polylactic acid fiber, which belongs to aromatic polyester fiber, but does not contain aromatic rings. Its synthetic raw materials come from natural plants (such as corn, etc.), and it is a new generation of environmentally friendly polyester synthetic fibers. Corn polylactic acid fiber is obtained by fermenting corn to produce lactic acid, which is made into polylactic acid through condensation polymerization, and then made into higher molecular weight polylactic acid with good mechanical properties by using a coupling agent, and then undergoes key chemical modification to increase its strength, Increases water retention and fibrillates it. ...

AI Technical Summary

Problems solved by technology

However, the carrier will increase the initial dyeing rate of the fiber, which will easily lead to uneven dye adsorption, and at the same time, it will easily reduce the dispersion stability of the dye solution, causing the dye to accumulate on the fiber and cause dyeing defects. Some carriers are difficult to remove after dyeing, resulting in Decrease in color fastness and fabric strength and cause fabric irritation to the human body. Some carriers are toxic and odorous, and have poor biodegradability, which will cause environmental pollution.