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Composite pulp of paper pulp and cotton linter and preparation method thereof

A technology for compounding pulp and linters, applied in pulp bleaching, papermaking, waste paper processing, etc., can solve the problems of excessive cellulose cracking, reduced yield, and impermeable steaming, etc., and achieve the effect of less pollution

Active Publication Date: 2011-09-14
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the raw materials are combined and cooked in the cooking section, the cellulose cracking of one of the raw materials will be too severe or the digestion will not be thorough, and the yield will be reduced, which is difficult to deal with.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The used papermaking bamboo pulp has 86.1% of cellulose A, wet weight of 10g, and the cotton linters are cooked according to the common process in chemical fiber industry.

[0020] 1. Process before pulp bleaching:

[0021] A. Alkali impregnation treatment: the content of alkali in the impregnation solution is 30g / L in terms of NaOH, the liquid ratio is 1:4.2, the temperature of the impregnation solution is 52°C under normal pressure, and the temperature is kept for 30min;

[0022] B. Cooking: The alkali rate is 15%, the liquid ratio is 1:3.2, the cooking aid sodium dodecylbenzene sulfonate is 0.5% of the dry pulp weight, and the green oxygen is 1% of the dry pulp weight. , the heating time is 40min, the small steam release time is 10min, the holding temperature is 146°C, and the holding time is 60min. After cooking, the residual alkali of the black liquor is 7.8g / L in terms of NaOH, and the viscosity after cooking is 14.3mPa.s;

[0023] C. Squeeze: screw squeezer, sq...

Embodiment 2

[0034] The used papermaking hemp pulp has a cellulose A of 88.4%, a wet weight of 35g, and the cotton linters are cooked according to the common process in the chemical fiber industry.

[0035] 1. Process before pulp bleaching:

[0036] A. Alkali impregnation treatment: the content of alkali in the impregnation solution is 25g / L in terms of NaOH, the liquid ratio is 1:2.0, the temperature of the impregnation solution is 50°C under normal pressure, and the temperature is kept for 20min;

[0037] B. Cooking: Alkali rate 10%, liquid ratio 1:2.0, cooking aid sodium dodecylbenzene sulfonate added at 5% of dry pulp weight, green oxygen added at 0.1% of dry pulp weight , the heating time is 30min, the small steam release time is 10min, the holding temperature is 110°C, and the holding time is 40min. After cooking, the residual alkali of the black liquor is 6.4g / L in terms of NaOH, and the viscosity after cooking is 13.0mPa.s;

[0038] C. Squeeze: screw squeezer, squeeze pressure 0....

Embodiment 3

[0049] The used papermaking bagasse pulp has 78.7% of the first cellulose and 8g in wet weight, and the cotton linters are cooked according to the common process in the chemical fiber industry.

[0050] 1. Process before pulp bleaching:

[0051] A. Alkali impregnation treatment: the alkali content in the impregnation solution is 60g / L in terms of NaOH, the liquid ratio is 1:8.5, the temperature of the impregnation solution is 80°C under normal pressure, and the temperature is kept for 60min;

[0052] B. Cooking: the alkali rate is 30%, the liquid ratio is 1:6.5, the cooking aid sodium dodecylbenzene sulfonate is added in an amount of 0.1% of the absolute dry pulp weight, and the amount of green oxygen added is 5% of the absolute dry pulp weight , the heating time is 50min, the small steam release time is 10min, the holding temperature is 170°C, and the holding time is 300min. After cooking, the residual alkali of the black liquor is 8.0g / L in terms of NaOH, and the viscosity ...

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Abstract

The invention provides a preparation method of composite pulp of paper pulp and cotton linter for viscose. By utilizing the method, the unique performances of fibers such as bamboos, woods, bast fibers, bagasse and the like can be combined with the excellent performances of cotton; any other two or more than two of raw materials such as the paper pulp or the bamboos, the woods, the cotton, the bast fibers and the like can be steamed and cooked independently and can be composited and prepared into dissolved pulp at a bleaching stage after being subjected to a series of process treatments. The varieties of the paper pulp used in the invention are not limited from production methods and raw materials and can be unbleached pulp or bleached pulp; through alkali steeping treatment, the difficulty in steaming and cooking the paper pulp is reduced, the prepared dissolved pulp has high content of alpha cellulose and the steeping liquor can be cyclically utilized; and by utilizing the method, the pollution in the pulping process is less and the cyclic utilization of the alkali liquor can be realized.

Description

technical field [0001] The invention relates to a kind of pulp for viscose fiber, specifically, a kind of pulp for composite viscose fiber prepared by using papermaking pulp and cotton linters as raw materials and its preparation process, which belongs to the technical field of pulp making . Background technique [0002] With the development of science and technology and the improvement of people's living standards, great changes have taken place in people's consumption concepts and health concepts. Consumers have higher and higher requirements for textile products. In terms of clothing, they not only require beautiful and comfortable, but also pay attention to personality Fashionable, antibacterial, antibacterial, easy to care, healthy and environmentally friendly. [0003] Viscose fibers produced from cotton, wood, bamboo, hemp, and other raw materials have their own characteristics, but the performance of viscose fibers produced by only one kind of pulp is monotonous, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02D21C3/02D21C3/22D21C9/14D21C9/16
CPCY02W30/64
Inventor 逄奉建王乐军刘建华秦翠梅姜明亮王东卢海蛟
Owner 潍坊欣龙生物材料有限公司
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