Polylactic acid fibre disperse dyeing accelerant

Abstract

The invention discloses a polylactic acid fiber loose dye dyeing accelerant, which consists of n-amyl acetate, compound emulsifier and water with a volume percentage of 10:0.3 to 0.6:89.4 to 89.7; wherein, the compound emulsifier consists of a Span type non-ion surface activator, a Tween type non-ion surface activator and a low molecular organic alcohol with volume percentage of 2 to 60: 35 to 98: 9 to 5. The polylactic acid fiber loose dye dyeing accelerant of the invention has the advantages of environment protection and good stability, playing the role of remarkably improving the dye uptake of polylactic acid fiber loose dye dyeing, being able to lighten the pollution to the water resource by the waste liquid of dyeing, besides, having a higher dyeing color fastness and having little effect on the breaking strength of a polylactic acid fiber fabric.

Description

technical field [0001] The invention relates to a dyeing accelerator suitable for polylactic acid fiber disperse dyeing with organic ester compounds as the main component and a dyeing technology using the accelerator to improve the dyeing performance of polylactic acid fiber, in particular to a polylactic acid fiber disperse Dye dyeing accelerator. Background technique [0002] Polylactic acid fiber (PLA fiber) is a synthetic fiber made from natural resources such as corn. It has good biodegradability and is a new type of environmentally friendly polyester fiber. It is mainly dyed with disperse dyes. However, the dyeing rate of disperse dyes currently available on the market to polylactic acid fibers is generally not high. Only a few disperse dyes can achieve a dyeing rate of more than 80% for polylactic acid fibers, some of which are 60-80%, and most of them are lower than 60%. , not only the dye has not been fully utilized, but also brings certain difficulties to the sewa...

AI Technical Summary

Problems solved by technology

However, the dyeing rate of disperse dyes currently available on the market to polylactic acid fibers is generally not high. Only a few disperse dyes can achieve a dyeing rate of more than 80% for polylactic acid fibers, some of which are 60-80%, and most of them are lower than 60%. , not only the dye has not been fully utilized, but also brings certain difficulties to the sewage treatment after dyeing

The reason for its low dyeing rate may be mainly due to the poor heat resistance of polylactic acid fiber. To maintain its basic properties, it can only be dyed at a temperature lower than 110°C. When blended with wool, cashmere and other protein fibers, Even the dyeing temperature below 100°C can only be selected, and under such temperature conditions, it is still difficult for the currently commercially available disperse dyes to fully diffuse into the interior of the polylactic acid fiber and form a firm bond with the fiber, so the dyeing rate is low and the production In practice, it is difficult to dye deep and thick colors, which not only causes waste of dyes and increases the burden of wastewater treatment, but also limits the popularization and application of polylactic acid fibers in the textile industry

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