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Modification method of regenerated cellulose fibre

A technology of regenerated cellulose and fiber, applied in the direction of rayon made of viscose, can solve the problems of high production cost, poor durability, poor fastness, etc., to offset internal stress, improve boiling water shrinkage, reduce The effect of small water swellability

Inactive Publication Date: 2011-06-01
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Filling method to modify cellulose fiber, the technical difficulty is that the functional additives are easy to lose during the spinning process, and even the part remaining on the fiber surface has poor fastness, high production cost and poor durability

Method used

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  • Modification method of regenerated cellulose fibre
  • Modification method of regenerated cellulose fibre
  • Modification method of regenerated cellulose fibre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Viscose solution (8.1% cellulose, 5.9% total alkali, 2.5% total sulfur) prepared by conventional methods. Dope preparation and spinning process are as follows:

[0026] Pulp→dipping, pressing, crushing→aging→yellowing→continuous dissolving→filtering→degassing→spinning

[0027] Preparation of pre-crosslinking solution (taking vegetable protein modified viscose fiber as an example): ethylene glycol glycidyl ether (trade name; Denakol EX-810), propylene glycol diglycidyl ether (trade name; Denakol EX-931) Or add one of the glycerol polyglycidyl ethers to a protein solution prepared with an alkali solution, the protein concentration is 30-50%, of which ethylene glycol glycidyl ether, propylene glycol diglycidyl ether or glycerol polyglycidyl ether The amount of the added amount accounted for 1.05% of the protein weight, stirred at a low speed for 3 hours, and filtered at a temperature of 32°C. The pH of the solution is 7-9.

[0028] The injection method is used 20 minute...

Embodiment 2

[0036] With the viscose solution (8.1% of cellulose, 5.9% of total alkali content, 2.5% of total sulfur content) prepared by conventional method, preparation method is the same as example 1.

[0037] The cross-linking agent described in Example 1 is added to the protein solution prepared with alkaline solution, the protein concentration is 30-50%, and the cross-linking agent addition accounts for 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, low-speed stirring, the time is 3h, the temperature is 32-33 ℃, filter. The pH of the solution is 7-9.

[0038] The injection method is used 20 minutes before spinning, specifically, the pre-crosslinked functional additive solution is quickly mixed with the viscose solution before continuous degassing. The reference flow of the spinning process is shown in the attached drawing. The protein solution is mixed with the viscose solution, wherein the protein solution is added at a rate of 15% by protein to methyl cellulose weight ratio.

[0039] ...

Embodiment 3

[0045] With the viscose solution (8.1% of cellulose, 5.9% of total alkali content, 2.5% of total sulfur content) prepared by conventional method, preparation method is the same as example 1.

[0046] Add the cross-linking agent described in Example 1 into the protein solution prepared with alkaline solution, the protein concentration is 30-50%, the amount of cross-linking agent added accounts for 1.5% of the protein weight, stir at low speed, time is 3h, temperature is 32-33°C, filter. The pH of the solution is 7-9.

[0047] The injection method is used 20 minutes before spinning, specifically, the pre-crosslinked functional additive solution is quickly mixed with the viscose solution before continuous degassing. The reference flow of the spinning process is shown in the attached drawing. The protein solution is mixed with the viscose solution, wherein the protein solution is added at a rate of 5%, 11%, 15%, 20%, 33%, 40% by weight of the protein to methyl cellulose.

[0048...

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Abstract

The invention provides a modification method of a regenerated cellulose fibre, comprising: pulping, dipping, squeezing, crushing, maturation, etiolation, continuous dissolving, filtering, deaeration and spinning, wherein functional additives are added in a continuous dissolving step or before a spinning step; and the functional additives are added with cross-linking agents which take 1 to 3 percent of a gross weight of the functional additives. The invention can increase fixation rates of additives and reduce water swelling properties of the regenerated fibres, therefore having a great significance for viscose glue continuous spinning products, specifically, a shrinkage in boiling water of continuous spinning rayon products can be improved.

Description

technical field [0001] The invention belongs to the technical field of cellulose fiber modification, and in particular relates to a modification method of regenerated cellulose fiber. Background technique [0002] The organic polymer compound in the form of solution or particles is filled into the regenerated fiber by blending and adding method, so that the regenerated fiber has permanent special functions. This is currently a popular method for the differentiation and functional modification of regenerated fibers, so that functional products such as flame retardant, antibacterial, antistatic, radiation-proof, and mite-proof can be produced. Molecules as functional additives can also be used to produce modified cellulose regenerated fibers using filling technology. There are many ways to produce regenerated cellulose fiber, such as viscose method, solvent method, acetic acid method, etc. As the oldest chemical fiber, it still has strong vitality and has developed rapidly in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/08
Inventor 张瑞文张旺玺焦明立
Owner ZHONGYUAN ENGINEERING COLLEGE
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