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Method for debleaching cotton web with compound enzyme

A technology of compound enzyme and cotton net, applied in the field of bleaching, can solve the problems of long cold stacking time at room temperature, etc., and achieve the effects of lowering the bleaching temperature, increasing the specific surface area of ​​the fiber, reducing the cost and the amount of wastewater treatment.

Active Publication Date: 2022-04-22
WUHAN TEXTILE UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, regardless of whether chemical cold reactors or enzyme cold reactors + chemical cold reactors are used, there are defects such as the use of strong alkalis and strong oxidants, and the long time of cold reactors at room temperature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 provides a kind of method that composite enzyme carries out debleaching treatment to cotton web, and this method comprises:

[0033] (1) Enzyme-ultrasonic composite cold stack: the cotton net is treated by ultrasonic waves in the enzyme cold stack liquid. The solution includes compound biological enzyme agent, fatty alcohol polyoxyethylene ether and TAED, the concentration of compound biological enzyme agent is 8g / L, the concentration of fatty alcohol polyoxyethylene ether is 1g / L, and the concentration of TAED is 2g / L. Among them, the composite biological enzyme agent is composed of cellulase, pectinase, protease, lipase, laccase and glucose oxidase in a mass ratio of 1.36:1.94:1.02:0.68:0.89:2.11.

[0034] (2) Ozone atmosphere treatment: expose the cotton net treated in step (1) to an ozone atmosphere for 1 hour, and the volume concentration of ozone in the ozone atmosphere is 30%.

[0035] (3) Spunlace: Spunlace the cotton web treated in step (2).

Embodiment 2

[0037] Example 2 is basically the same as Example 1, except that there is no TAED.

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PUM

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Abstract

The invention discloses a method for debleaching cotton nets with compound enzymes, and belongs to the technical field of bleaching. The method includes: (1) Enzyme-ultrasonic compound cold pile: the cotton net is processed by ultrasonic waves in the enzyme cold pile liquid, and the conditions of ultrasonic treatment are: the frequency of the ultrasonic wave is 40-100KHz, and the time is 30-60 minutes; The solution includes compound biological enzyme agent and surfactant, the concentration of compound biological enzyme agent is 6-14g / L, the concentration of surfactant is 0.5-4.0g / L, compound biological enzyme agent includes cellulase, pectinase, Protease, lipase, laccase and glucose oxidase; (2) ozone atmosphere treatment: the cotton net after step (1) treatment is exposed in ozone atmosphere for 0.5-2.0 hours, and the volume concentration of ozone in the ozone atmosphere is 20 ‑40%; (3) Spunlace: Spunlace the cotton web treated in step (2).

Description

technical field [0001] The invention belongs to the technical field of bleaching, in particular to a method for debleaching cotton webs with compound enzymes. Background technique [0002] At present, the technology of ozone bleaching cotton fabric is relatively mature, but the cotton fabric after ozone treatment has certain defects such as yellowing. However, the disadvantage of ozone bleached nonwovens to yellowing is negligible. As a basic raw material, non-woven fabric has the advantages of large output, low price, and fast production speed (no need for looms). In order to ensure its production efficiency, high-temperature bleaching is usually used (such as application number CN201710039416.8, temperature 105-135°C) or high alkali concentration bleaching (such as application number CN201710798689.0, caustic soda concentration 15g / L, hydrogen peroxide 30 g / L). The discharged waste liquid has high COD value, high pH value and severe reaction environment, which does not m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06L4/40D06L4/00D06L4/13D06L4/70D04H1/425D04H1/492D06B13/00
CPCD06L4/40D06L4/00D06L4/13D06L4/70D04H1/425D04H1/492D06B13/00
Inventor 张如全孙婷李建全邓志祥孙雷罗霞赵炜
Owner WUHAN TEXTILE UNIV