Rapid cross-linking method of cellulosic fiber and preparation method of antigen fibrillated cellulosic fiber

A technology of cellulose fiber and cross-linking method, which is applied in the field of functional cellulose fiber, can solve the problems of long time for fiber heat preservation in the production line, high industrial production cost, and large energy consumption, and achieve stable and controllable temperature, heating Good uniformity and prevent gelatinization

Pending Publication Date: 2021-01-29
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cross-linking treatment process in the above-mentioned patents is relatively complicated. It will consume a lot of energy to heat the blanket-like dense short fibers to the temperature of the cross-linking reaction on the production line, and the production line occupies a long time and the fiber heat preservation time is long. higher production costs

Method used

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  • Rapid cross-linking method of cellulosic fiber and preparation method of antigen fibrillated cellulosic fiber
  • Rapid cross-linking method of cellulosic fiber and preparation method of antigen fibrillated cellulosic fiber
  • Rapid cross-linking method of cellulosic fiber and preparation method of antigen fibrillated cellulosic fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) The Lyocell staple fibers laid into blanket after cutting are carried out cross-linking agent treatment, and the cross-linking agent is 2,4-dichloro-6-hydroxyl-1,3,5-s-triazine sodium (DCHT-Na), NaOH is mixed with water to prepare eluent, the concentration of cross-linking agent in eluent is 20g / L, the concentration of NaOH in eluent is 2g / L, and the temperature of eluent is 70°C. Place the Lyocell staple fiber laid into a blanket on the conveyor belt, and spray the washing liquid on the cellulose fiber through the spray device to treat the fiber with a crosslinking agent.

[0041] (2) Send the fiber treated with the crosslinking agent into the microwave heating device, the microwave heating power is 100KW, the microwave heating time is 2min, the inlet temperature is 30°C, the transmission speed is 1m / min, and the fiber passes through the microwave heating device at a speed of 1m / min, when the cellulose fiber runs to the middle of the microwave heating device, the ...

Embodiment 9

[0048] This example is a detailed description of the equipment used in the process of preparing fibrillated cellulose fibers in Examples 1-8. Such as figure 1 Shown, is the equipment figure of the whole continuous production line of Lyocell short fiber, comprises frame 20, and described frame 20 is provided with driving device and transmission device 22, and described transmission device 22 is the conveyer belt that is arranged along frame 20 length direction, A number of pressing rollers 21 are arranged on the conveyor belt, and the Lyocell short fibers paved into a blanket are flatly spread on the conveyor belt, and the conveyor belt moves under the drive of the driving device and drives the fiber layer 10 to move. Along the length direction of the frame 20, a thermal insulation device 30 and a microwave heating device 40 are also arranged in sequence. Spraying equipment is set in the thermal insulation device 30, and the spraying equipment is set figure 1 In the position s...

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Abstract

The invention belongs to the field of cellulosic fiber, and particularly discloses a rapid cross-linking method of cellulosic fiber. The rapid crosslinking method comprises the following steps: sending the cellulosic fiber treated by a cross-linking agent into a microwave heating device for microwave heating, and supplementing steam in the microwave heating process. And in the microwave heating process, supplement of steam starts when the fiber temperature is more than or equal to 60 DEG C. According to the method, the fiber can be rapidly heated on a cellulose fiber production line to initiate a cross-linking reaction to prepare the functional cellulose fiber, the method is particularly suitable for achieving a Lyocell short fiber rapid cross-linking reaction on a Lyocell fiber productionline, the fibrillation tendency of Lyocell fiber is reduced, and compared with heating through pure steam and heating through pure microwave, the method is higher in temperature rising speed, carriesout the rapid cross-linking reaction in the heating process, and is better in heating uniformity, lower in energy consumption.

Description

technical field [0001] The invention belongs to the field of functional cellulose fibers, and in particular relates to a rapid crosslinking method for cellulose fibers and a preparation method for anti-fibrillation cellulose fibers. Background technique [0002] Lyocell fibers use NMMO as a solvent to directly dissolve cellulose fibers to obtain viscous spinning solutions, and then make fibers through dry spraying and wet spinning processes. At the same time, NMMO in the production process can be recycled, and the recovery rate is as high as 99.5%. Compared with viscose fiber, the processing process is simple and the production process is environmentally friendly. It is known as the "green fiber" of the 21st century. Since the chemical structure of Lyocell fiber is basically the same as that of cotton and viscose fiber, it has the advantages of comfort and air permeability of natural fibers, and at the same time has the advantages of high strength and low shrinkage of synth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/358D06M11/38D06M10/00D06M10/08D06M10/06D06M101/06
CPCD06M13/358D06M11/38D06M10/003D06M10/08D06M10/06D06M2101/06
Inventor 张帆程春祖孙玉山徐纪刚张东任海涛齐斯琪
Owner CHINESE TEXTILE ACAD
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