Low-temperature dyeing method of PLA/PHBV blended yarn

Abstract

A low-temperature dyeing method of PLA / PHBV blended yarn comprises steps of: wetting the PLA / PHBV blended yarn into deionized water of 60-90 degrees centigrade, cleaning for 15-30min; taking disperse dye of 0.5%-2% of the weight of the blended yarn, dissolving the disperse dye into the deionized water to form a dye liquor, putting the blended yarn into the dye liquor, dyeing as per a bath ratio of 20-30:1, firstly heating up the dye liquor to 65-75 degrees centigrade by 2-4 degrees centigrade / min, heating up to 90-100 degrees centigrade by 1-2 degrees centigrade / min, maintaining the temperature for 40-60min; then cooling down to 50 degrees centigrade by 3-5 degrees centigrade / min, and taking out the blended yarn; reduction clearing the blended yarn, wherein the reduction clearing solution comprises 0.5-1g / L of sodium hydrosulfite and 0.5-1g / L of anhydrous sodium carbonate; the temperature of the reduction clearing solution is 75-90 degrees centigrade; the bath ratio is 20-30:1; and the reduction clearing duration is 20-30min. The low-temperature dyeing method of PLA / PHBV blended yarn solves the low-temperature dyeing problem of the PLA / PHBV blended yarn; the method saves energy and reduces production cost, and it has the advantages of deep dye color, uniform dyeing effect, washing fastness, and good crockfastness.

Description

technical field [0001] The invention relates to a low-temperature dyeing method of PLA / PHBV blended yarn, which belongs to the technical field of disperse dye dyeing technology. technical background [0002] In recent years, people have gradually realized that the production of traditional synthetic fibers is completely dependent on non-renewable resources-petroleum, which will lead to a large amount of energy and material consumption and is not sustainable. Therefore, degradable bio-based polymers and their blended products, such as polylactic acid (PLA), polyhydroxyalkanoate (PHA), have been gradually developed. Polylactic acid fiber is a bio-based fiber that has been successfully industrialized. However, its poor heat resistance makes the mechanical properties of the fiber severely damaged after heat treatment (spinning, dyeing, ironing, etc.). The PLA / PHBV blended yarn prepared by the Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences ...

AI Technical Summary

Problems solved by technology

Polylactic acid fiber is a relatively successful bio-based fiber in industrialization, but its poor heat resistance makes the mechanical properties of the fiber severely damaged after heat treatment (spinning, dyeing, ironing, etc.)

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