Composite enzyme preparation for degumming of linen fiber raw material, preparation method of composite enzyme preparation and degumming method of linen fiber raw material

Abstract

The invention discloses a composite enzyme preparation for degumming of a linen fiber raw material, a preparation method of the composite enzyme preparation and a degumming method of the linen fiber raw material. The composite enzyme preparation comprises components in percentage by mass as follows: 70% of alkaline pectate lyase, 2% of alkaline cellulase, 18% of alkaline xylanase and 10% of laccase. With the adoption of the technical scheme, more than 20% of bleaching liquor is reduced in the linen fiber bleaching process, more than 40% of caustic soda is reduced in the linen fiber bleaching process, the breaking strength of the linen fiber is increased by more than 5%, the fineness of the linen fiber is increased by more than 20%, the elongation at break is increased by more than 30%, the fiber strength is uniform, the spinnability of the fiber is remarkably improved, accordingly, economic benefits are increased, and the production cost is reduced; the COD (chemical oxygen demand) is reduced by more than 30%.

Description

technical field [0001] The invention belongs to the technical field of textiles and relates to degumming of flax fiber raw materials, in particular to a compound enzyme preparation for degumming of flax fiber raw materials, a preparation method thereof and a method for degumming of flax fiber raw materials. Background technique [0002] Flax fiber is an excellent fiber in the textile industry. Its fabric not only has good moisture absorption and heat dissipation, but also has good air permeability, and has a crisp and natural style, comfortable and cool to wear, and is deeply loved by consumers. Its spinnable fibers exist in the bast of the original flax stem in the form of fiber bundles. The length of the single fiber of flax is 10 mm to 26 mm, and the two ends of the single fiber are overlapped axially or laterally by pectin to form fibers. Bundles, fiber bundles and fiber bundles, bast and xylem are all connected by glue. In order to produce spinnable fibers in flax, the...

AI Technical Summary

Problems solved by technology

Although the enzyme degumming technology of flax fiber has made some progress in recent years, most of them are still in the laboratory research stage and cannot be applied industrially.

The main reasons are 1. The instability of the enzyme preparation structure, the selection of corresponding enzyme species, precise control, and how to integrate into the flax fiber degumming process, there are still many problems; 2. The commercially available enzyme activity is low and the price is relatively high. High, 3. The amount of enzyme reagent is unscientific; if the amount of enzyme added in the degumming process is small, the residual glue rate is not up to standard; if the amount of enzyme added is large, the production cost is not dominant, and it has obvious effects on the breaking strength of flax fiber damage; 4. The enzyme structure is unreasonable. For example, the enzyme preparation for flax degumming is mainly based on pectinase. Due to the specificity of the enzyme preparation, it only hydrolyzes pectin substances, while hemicellulose, wood Substances such as pigment and wax paper can only be removed by a certain concentration of acid and alkali, which will inevitably affect the breaking strength and preventability of the fiber

Therefore, in terms of quality and cost, the current enzymatic degumming method is difficult to popularize and apply. Most of them use semi-chemical and semi-enzymatic degumming methods, which still cannot solve the problems of large amount of degumming wastewater, high COD value, and high environmental protection treatment costs.

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