Dyeing and finishing process for bamboo fibre

Abstract

The present invention discloses a bamboo fiber dyeing and finishing process, which sequentially comprises the prodedures as follows: enzyme desizing, singeing, oxide bleaching, de-fleecing and enzyme finishing, dyeing, after finishing and other procedures. A bleaching unit machine is used for the enzyme desizing and oxide bleaching, thus simplifying the process flow and saving the energy. The unwooling and enzyme finishing after the oxide bleaching increases the color and luster of the product; in addition, the normal-temperature and pressure jig dyeing avoids the over-tension of the fabrics and the phenomena of end breaking and scratches and reliably ensures the product quality. The amount of peroxide is controlled to be 3.5g / L without adjusting pH value, thus reducing the process control difficulty.

Description

【Technical field】 [0001] The invention relates to the field of textile printing and dyeing, in particular to the dyeing and finishing process of bamboo fiber. 【Background technique】 [0002] Bamboo fiber is the fifth largest natural textile element after the four natural fibers of cotton, linen, wool and silk, and is a real "ecological fiber". Bamboo fiber is smooth, soft and warm, better than silk and satin; hygroscopicity, moisture release, and air permeability rank first among all major textile fibers; antibacterial and antibacterial, high sterilization rate; green and environmentally friendly, anti-ultraviolet; derived from nature, fashionable and healthy. Regenerated cellulose fibers obtained through special processing are widely used in various fabrics. [0003] At present, the dyeing and finishing process of bamboo fiber is: singeing - desizing - scouring - oxygen bleaching - dyeing - finishing. There are many disadvantages in this process: [0004] 1. The process ...

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Problems solved by technology

[0004] 1. The process is long and numerous; energy consumption is large: desizing, oxygen bleaching, and dyeing consume a lot of steam; finishing consumes a lot of silicone oil, and there are many production process steps, which are easy to cause scratches: cloth feed frame, spinning roller, crawler, stuck These parts of the roller are easy to cause scratches, because the fabric feels hard before finishing and the yarn count is fine

[0005] 2. Because bamboo fiber is not resistant to strong alkali, it swells greatly when it meets water, and its wet strength is poor. Oxygen bleaching after desizing can easily cause broken ends, holes, and broken edges, etc.;

[0006] 3. In order to adjust the PH value within a reasonable range, the amount of hydrogen peroxide used for oxygen bleaching must be strictly controlled at 4-5g / L. If the amount of hydrogen peroxide is too large, it will easily cause brittle damage to the bamboo fiber. If the amount of hydrogen peroxide is too small, it will easily cause bamboo fiber damage. The whiteness of the fabric does not meet the requirements, and the process control is difficult

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