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Flock pulping process

A process and pulping technology, which is applied in the preparation of spinning solutions and rayon made of viscose, etc., can solve the problem that the reaction performance of cotton pulp cannot be effectively improved, the oil and wax of cotton linters cannot be removed, and the cotton linters cannot be used. In the manufacture of chemical fiber cotton pulp and other problems, to reduce or eliminate pollution, improve strength and utilization, and feel soft and smooth

Inactive Publication Date: 2017-10-17
东至县鸿棉工贸有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the domestic counterparts and relevant scientific research institutes have successively studied the method of adding hydrogen peroxide for cooking and bleaching when the cotton linters are cooking and feeding, because the heating temperature in the later stage of cooking is reduced, and the cooking quality is affected.
Since hydrogen peroxide can only bleach the surface of the fiber and cannot penetrate into the interior, and hydrogen peroxide cannot remove the oil and wax of cotton linters, it cannot effectively improve the reactivity of cotton pulp and cannot be used to make chemical fiber cotton pulp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of linter pulping process, is made up of the following steps:

[0017] (1) Using cotton linters as raw material, under normal pressure, at a temperature below 85°C, adding 2.5% alkali, and cooking for 25 minutes to obtain cotton pulp, or directly bleaching without alkali soaking and cooking, and then adding chlorine 3.5%, treated for 30 minutes under the condition of pH 3.2 to obtain cotton pulp;

[0018] (2) Spinning: viscose pulp → soaking, pressing, dispersing alkali cellulose aging → yellowing → solution mixing → filtration → defoaming → spinning forming.

[0019] In the step (2), magnesium sulfate whose mass is 0.2% of cotton wool is also added.

[0020] Spinning in the step (2) is to dissolve the cotton linter pulp in NMMO solvent, after impurity removal and filtration, the dry-jet wet spinning process is used for spinning, and then washing, drying, crimping and cutting.

Embodiment 2

[0022] A kind of linter pulping process, is made up of the following steps:

[0023] (1) Using cotton linters as raw materials, under normal pressure, at a temperature below 85°C, adding 3.5% alkali, and cooking for 35 minutes to obtain cotton pulp, or directly bleaching without alkali soaking and cooking, and then bleaching in chlorine 5.2%, treated for 50 minutes under the condition of pH 4.4 to obtain cotton pulp;

[0024] (2) Spinning: viscose pulp → soaking, pressing, dispersing alkali cellulose aging → yellowing → solution mixing → filtration → defoaming → spinning forming.

[0025] In the step (2), magnesium sulfate whose mass is 0.2% of cotton wool is also added.

[0026] Spinning in the step (2) is to dissolve the cotton linter pulp in NMMO solvent, after impurity removal and filtration, the dry-jet wet spinning process is used for spinning, and then washing, drying, crimping and cutting.

Embodiment 3

[0028] A kind of linter pulping process, is made up of the following steps:

[0029] (1) Using cotton linters as raw materials, under normal pressure, at a temperature below 85°C, adding 3% alkali, and cooking for 30 minutes to obtain cotton pulp, or directly bleaching without alkali soaking and cooking, and then adding chlorine 4.4%, treated for 40 minutes under the condition of pH 3.8 to obtain cotton pulp;

[0030] (2) Spinning: viscose pulp → soaking, pressing, dispersing alkali cellulose aging → yellowing → solution mixing → filtration → defoaming → spinning forming.

[0031] In the step (2), magnesium sulfate whose mass is 0.2% of cotton wool is also added.

[0032] Spinning in the step (2) is to dissolve the cotton linter pulp in NMMO solvent, after impurity removal and filtration, the dry-jet wet spinning process is used for spinning, and then washing, drying, crimping and cutting.

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Abstract

The invention discloses a flock pulping process. The flock pulping process is characterized by comprising the following steps that (1) cotton flocks work as raw material; at ordinary pressure and the temperature of under 85 DEG C, 2.5 to 3.5% alkali is added to the cotton flocks, and then stewed for 25 to 35 minutes to achieve cotton pulp, or, the cotton flocks are directly bleached rather than being immersed into the alkali and steamed, and then processed for 30 to 50 minutes in 3.5% to 5.2% of chlorine with the pH value of being 3.2 to 4.4 to achieve cotton pulp; (2) filaments are spinned; pulp is glued, then immersed, pressed and dispersed and alkali cellulose is aged, yellowed, mixed with solution, filtered, defoamed and spinned and formed. Cotton pulp strength and utilization rate can be improved; consumption and cost can be reduced and pollution can be reduced or eliminated; the cotton flock fibers can be effectively utilized, spinned and weaved; the cotton flock fibers are soft and smooth, have great moisture absorbing and ventilating properties, and friendly to skin; the cotton flocks are environment-friendly and can be naturally degraded; and aims of the invention can be achieved.

Description

technical field [0001] The invention relates to the field of linter processing, in particular to a linter pulping process. Background technique [0002] With the progress of society, people have higher expectations for improving the quality of life, and the market demand for textiles is becoming more and more personalized, functional and health-care. New health-care fibers are developing rapidly in our country at an extremely fast speed. Although some fibers still have imperfections in the development process, it is believed that with the continuous improvement and maturity of the production process, their performance will be improved. Its products have a very broad space for development. Judging from the market consumption trend, people's pursuit of the function of bedding has transitioned from the warm-keeping type to the health-care type. [0003] my country is a large cotton-producing country, with an annual output of up to 706 million tons of lint and hundreds of thou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/02D01F2/08C08B9/00
CPCC08B9/00D01D1/02D01F2/08
Inventor 钱叶林
Owner 东至县鸿棉工贸有限责任公司
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