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Degumming method of fabric

A degumming method and hemp fiber technology are applied in the chemical post-treatment of fibers, fiber treatment, textiles and papermaking, etc., which can solve the problems of unsatisfactory degumming effect, affecting the processing quality of hemp fiber products and ramie fabrics, etc., and achieve easy manufacturing Take, degumming effect is good, the effect of reducing costs

Inactive Publication Date: 2008-01-23
THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these methods, the supercritical carbon dioxide fluid degumming process is simply applied, and a one-time supercritical degumming method is adopted, that is, a certain temperature and a certain pressure are used for a certain period of time, and the degumming effect is not very satisfactory, thus affecting the hemp fiber product and Processing Quality of Ramie Fabric

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Soda cooking

[0029] Get 50g of hemp fiber and place it in the boiling pot, add NaOH, NaOH and NaOH in the boiling pot 2 SiO 3 and detergent at 100°C for 60 minutes, the amount of NaOH is 5g / l, Na 2 SiO 3 The amount of detergent is 0.5g / l, and the amount of detergent is 0.5g / l;

[0030] 2) Washing and drying

[0031] Taking out the hemp fiber that has been boiled with alkali in the previous step, washing and drying to obtain anhydrous hemp fiber;

[0032] 3) Supercritical carbon dioxide fluid degumming

[0033] Place the anhydrous hemp fiber obtained in the previous step in a supercritical carbon dioxide fluid treatment device, first treat it at a pressure of 10MPa and a temperature of 115°C for 40 minutes, then treat it at a pressure of 29MPa and a temperature of 115°C for 40 minutes, and take it out for processing Post hemp fiber.

[0034] Tested according to GB5889-86, the cellulose content in the prepared fiber is 96.5%.

Embodiment 2

[0036] 1) Soda cooking

[0037] Get 50g of hemp fiber and place it in the boiling pot, add NaOH, NaOH and NaOH in the boiling pot 2 SiO 3 and detergent at 130°C for 40 minutes, the amount of NaOH is 5g / l, Na 2 SiO 3 The amount of detergent is 1g / l, and the amount of detergent is 2g / l;

[0038] 2) Washing and drying

[0039] Taking out the hemp fiber that has been boiled with alkali in the previous step, washing and drying to obtain anhydrous hemp fiber;

[0040] 3) Supercritical carbon dioxide fluid degumming

[0041] Place the anhydrous hemp fiber obtained in the previous step in a supercritical carbon dioxide fluid treatment device, first treat it at a pressure of 15MPa and a temperature of 80°C for 20 minutes, then treat it at a pressure of 29MPa and a temperature of 80°C for 20 minutes, and take it out for processing Post hemp fiber.

[0042] Tested according to GB5889-86, the cellulose content in the prepared fiber is 97.5%.

Embodiment 3

[0044] 1) Soda cooking

[0045] Get 50g of hemp fiber and place it in the boiling pot, add NaOH, NaOH and NaOH in the boiling pot 2 SiO 3 and detergent at 170°C for 30 minutes, the amount of NaOH is 8g / l, Na 2 SiO 3 The amount of detergent is 1g / l, and the amount of detergent is 0.5g / l;

[0046] 2) Washing and drying

[0047] Taking out the hemp fiber that has been boiled with alkali in the previous step, washing and drying to obtain anhydrous hemp fiber;

[0048] 3) Supercritical carbon dioxide fluid degumming

[0049] Place the anhydrous hemp fiber obtained in the previous step in a supercritical carbon dioxide fluid treatment device, first treat it at a pressure of 10MPa and a temperature of 130°C for 60 minutes, then treat it at a pressure of 20MPa and a temperature of 130°C for 60 minutes, and take it out for treatment Post hemp fiber.

[0050] Tested according to GB5889-86, the cellulose content in the prepared fiber is 97.8%.

[0051] Embodiment 4, 5, 6, 7, 8 and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention relates to a degumming method for hemp fiber, in particular to a method for combined application of chemical with super critical CO2 fluid degumming. Wherein, before carrying out super critical CO2 fluid degumming, the hemp fiber first goes through chemical treatment, then super critical degumming is carried out under low and hi pressure respectively. The invention can obviously reduce the non-cellulose composition for example lignin, etc. in hemp fiber, is of an ideal degumming effect, with obviously improved cellulose ratio, very good softening effect of fiber, hence improved process quality of hemp fiber; the invention additionally overcomes the shortcoming associated with prior degumming way such as high pollution, etc., and is of high economic efficiency.

Description

technical field [0001] The invention relates to a degumming method of hemp fiber, in particular to a degumming method combined with chemical and supercritical carbon dioxide fluid. Background technique [0002] my country is the country with the richest hemp fiber resources. Since the country set off a "hemp product fever" in the early 1980s, it marked that the hemp textile industry has entered a prosperous period. At present, the production, processing and sales of hemp fiber and its products have occupied an important position in my country's national economy. There are more than 1,000 hemp textile, printing and dyeing enterprises in my country. The value of fixed assets has exceeded 3 billion yuan, and the total demand for hemp fiber has exceeded 1 million tons. [0003] Hemp is an annual crop, which was once an important fiber, oil plant, and food crop for humans. It originated from China or other countries in Central Asia. Then gradually spread to Europe, South Ameri...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01C1/00D06M11/76
Inventor 郝新敏张建春张华
Owner THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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