Jute fiber degumming method

A technology of jute fiber and degumming method, which is applied in the direction of producing bast fiber by chemical method, can solve the problems of failure to carry out mass production, strong itching, damage of jute fiber, etc., to avoid chemical scouring treatment, reduce pollution discharge, The effect of increasing the number of splits

Inactive Publication Date: 2014-04-16
SHANGHAI YIKE TEXTILE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly adopts pectinase to degumming jute fiber, but because the symbiosis such as pectin, hemicellulose and lignin are produced in the growth process of jute fiber, they are intermingled with each other, because The specificity of biological enzymes, pectinase has no removal effect on hemicellulose and lignin, so only pectinase can only remove most of the pectin, and there is still a small amount of residual entangled on hemicellulose and lignin The pectin cannot be completely removed, the degummi...

Method used

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  • Jute fiber degumming method

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Take the degumming process of 200kg jute fiber as an example. First, the jute fiber is caged into a tank with a bath ratio of 1:15, and then the following steps are used for processing:

[0045] (1) Pectinase degumming: Use 2kg pectinase, adjust the pH to 7-8 with soda ash, and soak for 120 minutes at 50℃-55℃;

[0046] (2) Xylanase degumming: use 2 kg of xylanase, adjust the pH to 8-8.5 with soda ash, and soak for 120 minutes at 50℃-55℃;

[0047] (3) Alkali refining: use 12kg of caustic soda, 6kg of soda ash, 8kg of sodium sulfite, 4kg of refining agent (H-95), 4kg of chelating dispersant (CBI), 2kg of alkali sulfide, and treatment for 120min at 98℃-100℃;

[0048] (4) Sodium hypochlorite bleaching: use 40 kg of sodium hypochlorite solution with 10% available chlorine, and treat for 50 minutes at room temperature;

[0049] (5) Pickling: use 6kg sulfuric acid and treat at 40℃ for 30min;

[0050] (6) Hydrogen peroxide bleaching: use 26kg of 30% hydrogen peroxide, 5kg of soaking alkal...

Embodiment 2

[0054] Take the degumming process of 200kg jute fiber as an example. First, the jute fiber is caged into a tank with a bath ratio of 1:15, and then the following steps are used for processing:

[0055] (1) Pectinase degumming: Use 4kg pectinase, adjust the pH to 6-7 with soda ash, and soak for 60 minutes at 40℃-45℃;

[0056] (2) Xylanase degumming: use 4kg of xylanase, adjust the pH to 7-8 with soda ash, and soak for 60 minutes at 40℃-45℃;

[0057] (3) Alkali refining: use 16kg of caustic soda, 4kg of soda ash, 6kg of sodium sulfite, 6kg of refining agent (H-95), 6kg of chelating dispersant (CBI), 4kg of alkali sulfide, and treatment at 95℃-98℃ for 90min;

[0058] (4) Sodium hypochlorite bleaching: use 60kg of sodium hypochlorite solution with 10% available chlorine, and treat for 30min at room temperature;

[0059] (5) Pickling: Use 4kg sulfuric acid and treat at 30°C for 60min;

[0060] (6) Hydrogen peroxide bleaching: use 33kg of 30% hydrogen peroxide, 8kg of soaking alkali, 2kg of re...

Embodiment 3

[0064] Take the degumming process of 200kg jute fiber as an example. First, the jute fiber is caged into a tank with a bath ratio of 1:15, and then the following steps are used for processing:

[0065] (1) Pectinase degumming: use 1 kg of pectinase, adjust the pH to 8-8.5 with soda ash, and soak for 150 minutes at 60℃-70℃;

[0066] (2) Xylanase degumming: use 1 kg of xylanase, adjust the pH to 8.5-9.5 with soda ash, and soak for 150 minutes at 55℃-65℃;

[0067] (3) Alkali refining: use 20kg of caustic soda, 4kg of soda ash, 10kg of sodium sulfite, 4kg of refining agent (RUCO-STAB LGA), 2kg of chelating dispersant (foaming alkali), 2kg of alkali sulfide, and treatment at 95℃-100℃ 100min;

[0068] (4) Hydrogen peroxide bleaching: use 20kg of 30% hydrogen peroxide, 4kg of soaking alkali, 4kg of refining agent (H-95), 4kg of soda ash, adjust the pH to 10.5-11, and treat at 95℃-98℃ for 120min;

[0069] (5) Pickling: Use 2kg sulfuric acid and treat at 60℃ for 50min;

[0070] (6) Hydrogen per...

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Abstract

The invention provides a jute fiber degumming method. The method comprises the following steps: (1) degumming by using pectinase, wherein the mass percentage of the pectinase relative to jute fibers is 0.5 to 2 percent; (2) degumming by using xylanase, wherein the mass percentage of the xylanase relative to the jute fibers is 0.5 to 2 ercent; (3) refining by utilizing caustic soda and sodium carbonate; (4) bleaching by using sodium hypochlorite or hydrogen peroxide; (5) performing acid pickling by using sulphuric acid; (6) bleaching again by using the hydrogen peroxide. According to the jute fiber degumming method, the jute fibers are degummed sufficiently by using the pectinase and the xylanase which have no damage to the jute fibers, have no pollution to environment, and have high specificity, so that the division number and the evenness of the jute fibers can be effectively improved; decomposed symbionts are sufficiently removed by refining and bleaching by using chemical methods, so that the jute fibers are refined and softened; the requirements on the yarns for textile and apparel are met; high-alkaline high-temperature chemical scouring treatment is avoided; the damage to fibers is reduced; pollution emissions are reduced.

Description

Technical field [0001] The invention belongs to the field of textile raw material processing, and specifically relates to a method for degumming jute fiber. Background technique [0002] Jute fiber is mainly composed of cellulose, hemicellulose, lignin, pectin, etc. The content of lignin and hemicellulose is higher than that of flax and ramie, which results in jute fiber being thick and hard, with poor spinnability, and strong The irritation, so it is mainly used in packaging sacks and industrial cloth. However, jute fiber has strong antibacterial properties, excellent breathability and moisture absorption, anti-ultraviolet, anti-static, anti-radiation and important low-cost properties, so it has broad commercial development value. [0003] At present, there are many researches on the application of jute fiber in textiles and clothing at home and abroad. For example, the biochemical combined degumming method for jute fiber mainly includes the following steps (the content of each s...

Claims

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Application Information

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IPC IPC(8): D01C1/02
Inventor 刘长山
Owner SHANGHAI YIKE TEXTILE TECH
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