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A kind of chlorine-free bleached high-white viscose fiber and its preparation method

A viscose fiber and chlorine bleaching technology, applied in the field of chemical fiber processing, can solve problems such as human safety risks, achieve the effects of improving bleaching effect, reducing energy consumption, and reducing fiber performance damage

Active Publication Date: 2021-06-11
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

Because some fluorescent whitening agents are added to medical hygiene materials, there are potential risks to human safety. Therefore, in order to meet market demand, it is necessary to further develop the preparation process of all chlorine-free high-white viscose fibers without fluorescent whitening agents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of viscose spinning stock solution: use chlorine-free bleached and dissolved wood pulp pulp with a whiteness of 89% and a cellulose content of 90% as raw material, which includes soaking, pressing, crushing, aging, yellowing, and dissolving Viscose spinning stock solution is prepared through steps such as aging and aging, and is mixed with titanium dioxide dispersion evenly before being sent to the spinning machine; the mass ratio of titanium dioxide and pure water in the titanium dioxide dispersion is 1:4; titanium dioxide and viscose stock solution The mass ratio of Zhongjia fiber is 1.0:100.

[0033] (2) Viscose spinning:

[0034] 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 collected into long strands through the godet roller...

Embodiment 2

[0039](1) Preparation of viscose spinning stock solution: use chlorine-free bleached and dissolved wood pulp pulp with a whiteness of 89% and a cellulose content of 90% as raw material, which includes soaking, pressing, crushing, aging, yellowing, and dissolving Viscose spinning stock solution is prepared through steps such as aging and aging, and is mixed with titanium dioxide dispersion liquid evenly and then sent to the spinning machine; the mass ratio of titanium dioxide and pure water in the titanium dioxide dispersion liquid is 1:5; titanium dioxide and viscose stock solution The mass ratio of Zhongjia fiber is 0.5:100.

[0040] (2) Viscose spinning:

[0041] 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 collected into long strands through the god...

Embodiment 3

[0046] (1) Preparation of viscose spinning stock solution: use chlorine-free bleached and dissolved wood pulp pulp with a whiteness of 89% and a cellulose content of 90% as raw material, which includes soaking, pressing, crushing, aging, yellowing, and dissolving Viscose spinning stock solution is prepared through steps such as aging and aging, and is mixed with titanium dioxide dispersion liquid evenly and then sent to the spinning machine; the mass ratio of titanium dioxide and pure water in the titanium dioxide dispersion liquid is 1:5; titanium dioxide and viscose stock solution The mass ratio of Zhongjia fiber is 0.7:100.

[0047] (2) Viscose spinning:

[0048] 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 collected into long strands through the go...

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Abstract

The invention relates to the technical field of chemical fiber processing, in particular to a chlorine-free bleached high-white viscose fiber and a preparation method thereof. The chlorine-free bleached and dissolved wood pulp is selected as a raw material to prepare a viscose spinning stock solution, which is mixed with a titanium dioxide dispersion After mixing evenly, send it to the spinning machine, solidify and regenerate the primary fiber; the primary fiber is drawn and oriented to form a fiber with a certain strength, after being cut, it enters the fluff tank and refining machine, and adopts a low-temperature activated oxygen bleaching process to obtain chlorine-free bleaching. High white viscose. The chlorine-free bleached high-white viscose fiber prepared by the invention has high whiteness, extremely low defect content, and extremely small residual sulfur content, and can be used in various non-woven fabrics and medical hygiene materials; by adopting a low-temperature activated oxygen bleaching process , avoiding the pollution of chlorine compounds in wastewater caused by the chlorine bleaching process; compared with the high-temperature oxygen bleaching process, the present invention is beneficial to reduce energy consumption, reduce damage to fiber mechanical properties, and achieve a comprehensive balance between fiber mechanical properties and whiteness improvement .

Description

technical field [0001] The invention relates to the technical field of chemical fiber processing, in particular to a chlorine-free bleached high-white viscose fiber and a preparation method thereof. Background technique [0002] Clean and high-white viscose fiber is a kind of differentiated viscose fiber, which has been widely used in the fields of non-woven fabrics and medical hygiene materials. Whiteness is an important evaluation index of clean and high white viscose fiber. In order to improve the whiteness of the fiber, in the production of viscose fiber, sodium hypochlorite or hydrogen peroxide is mainly used to bleach the fiber, but chlorine or chlorine compounds are used for bleaching. There is a pollution problem of chlorine compounds in the bleaching wastewater, and only hydrogen peroxide is used for bleaching. There are problems such as insufficient fiber whiteness and high amount of hydrogen peroxide causing damage to fiber mechanical properties. In the prior ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/08D06L1/16D06M11/38D06M11/53D06M11/00D06M13/00D06M15/00D06L4/13D06L4/15D06M101/06
Inventor 林庆辉郭巍王波黄志冰陈晨玮张文涛龙正武范海江
Owner 赛得利(福建)纤维有限公司