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Preparation method of flame-retardant viscose fiber

A flame retardant viscose fiber and viscose fiber technology, applied in the direction of flame retardant fiber, fiber treatment, plant fiber, etc., can solve problems such as risks and residues, achieve less formaldehyde content, reduce the decline of mechanical properties, and avoid possible problems. Effects of spinning problems

Pending Publication Date: 2021-03-26
赛得利(福建)纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to improve the whiteness of flame-retardant viscose fibers, sodium hypochlorite is often used for bleaching in the production of viscose fibers. The fiber production process uses sodium hypochlorite and hydrogen peroxide bleaching to prepare flame-retardant matte high-white cellulose fibers, so that some organic halides will remain in the finished fibers, which will bring potential risks to human health, so It is necessary to further develop flame-retardant viscose fibers without chlorine bleaching

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of viscose fiber:

[0038] After mixing the pulp of chlorine-free bleached softwood dissolving pulp and chlorine-free bleached hardwood dissolving pulp at a mass ratio of 5:100, the pulp is prepared by steps including soaking, pressing, crushing, aging, yellowing, dissolving and aging. Glue spinning stock solution, after the spinning stock solution is sent to the spinning machine, it is sprayed out from the spinneret by the metering pump, reacts with the coagulation bath in the acid bath, coagulates and regenerates the primary fibers; the coagulated and regenerated primary fibers are drawn, Oriented fibers with a certain strength are cut and enter the fluff tank; the steam bubbles ejected through the small holes of the steaming pipe at the bottom of the fluff tank scour the fibers to make the thickness of the fiber layer uniform. The whiteness of the chlorine-free bleached dissolving pulp pulp is more than 89%, and the cellulose content is more than 90%;...

Embodiment 2

[0043] (1) Preparation of viscose fiber:

[0044] After mixing the pulp of chlorine-free bleached softwood dissolving pulp and chlorine-free bleached hardwood dissolving pulp at a mass ratio of 8:100, the pulp is prepared by steps including soaking, pressing, crushing, aging, yellowing, dissolving and aging. Glue spinning stock solution, after the spinning stock solution is sent to the spinning machine, it is sprayed out from the spinneret by the metering pump, reacts with the coagulation bath in the acid bath, coagulates and regenerates the primary fibers; the coagulated and regenerated primary fibers are drawn, Oriented fibers with a certain strength are cut and enter the fluff tank; the steam bubbles ejected through the small holes of the steaming pipe at the bottom of the fluff tank scour the fibers to make the thickness of the fiber layer uniform. The whiteness of the chlorine-free bleached dissolving pulp pulp is more than 89%, and the cellulose content is more than 90%;...

Embodiment 3

[0049] (1) Preparation of viscose fiber:

[0050] After mixing the pulp of chlorine-free bleached softwood dissolving pulp and chlorine-free bleached hardwood dissolving pulp at a mass ratio of 6:100, the pulp is prepared by steps including soaking, pressing, crushing, aging, yellowing, dissolving and aging. Glue spinning stock solution, after the spinning stock solution is sent to the spinning machine, it is sprayed out from the spinneret by the metering pump, reacts with the coagulation bath in the acid bath, coagulates and regenerates the primary fibers; the coagulated and regenerated primary fibers are drawn, Oriented fibers with a certain strength are cut and enter the fluff tank; the steam bubbles ejected through the small holes of the steaming pipe at the bottom of the fluff tank scour the fibers to make the thickness of the fiber layer uniform. The whiteness of the chlorine-free bleached dissolving pulp pulp is more than 89%, and the cellulose content is more than 90%;...

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Abstract

The invention provides a preparation method of a flame-retardant viscose fiber. The preparation method comprises the following steps of selecting chlorine-free bleached and dissolved wood pulp as a raw material to prepare a viscose spinning stock solution, feeding the viscose spinning stock solution into a spinning machine, and solidifying to regenerate nascent fibers; and enabling the nascent fibers to be drafted and oriented to form fibers with certain strength, then enabling the fibers to enter a fluff tank and a refiner after being cut off, adopting a low-temperature activation oxygen bleaching process in the refining and bleaching process, and preparing the halogen-free environment-friendly flame-retardant viscose fibers by adopting an after-treatment method of the fibers. By optimizing an ammonium salt flame retardant, the prepared flame-retardant viscose fiber has the advantages of low formaldehyde content, relatively high whiteness, relatively high dry strength, relatively goodflame retardancy and certain washability, does not contain adsorbable organic halides, and can be used in the fields of textiles and non-woven fabrics.

Description

technical field [0001] The invention relates to the technical field of chemical fiber processing, in particular to a preparation method of flame-retardant viscose fiber. Background technique [0002] Compared with synthetic fibers such as polyester and polyamide, viscose fiber has better moisture absorption, comfort and other excellent properties, and is biodegradable. Its application range has been extended to clothing, decoration, medical and health and industrial products and other fields. With the progress of society and the improvement of safety awareness, people's requirements for flame retardancy of fiber products are increasing day by day. However, due to the chemical structure, viscose fiber is flammable as a polymer, so it is necessary to study the flame retardant modification technology of viscose fiber. [0003] The patent with the application number CN201110252275.0 discloses a phosphorus-nitrogen flame retardant dispersion and its preparation method, which so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/08D06L4/13D06M13/288D06M13/292D06M101/06
CPCD01F2/08D06L4/13D06M13/292D06M13/288D06M2101/06D06M2200/30
Inventor 林庆辉郭巍黄志冰姚锰郑超吴晓东
Owner 赛得利(福建)纤维有限公司
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