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Method for producing modal fiber from cotton pulp

A technology of modal fiber and production method, which is applied in the field of fiber production, can solve the problems of fabrics not being resistant to multiple washings, poor product practicability, serious fibrillation, etc., and achieve non-irritating skin, good wearing performance, and cohesion strength high effect

Active Publication Date: 2012-02-01
唐山三友集团兴达化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome these shortcomings, polynosic fiber has been developed in the industry. The fiber is characterized by high dry and wet breaking strength and high wet breaking modulus, but its interlocking strength is low, the fabric is not resistant to repeated washing, and the fibrillation is serious , the product is not practical

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example is a production method of modal fiber, which adopts cotton pulp with a cellulose content of 97.5% and a degree of polymerization of 915DP, dipping alkali concentration of 222 g / liter, dipping for 25 minutes, and adding Swedish The Berol Visco 388 additive produced by Akzo Nobel Company is added in an amount of 0.16% of the weight of methylcellulose in the porridge. Alkali cellulose with an alkali to cellulose ratio of 0.65 is obtained after pressing. The alkali cellulose was aged at 18 degrees for 4.5 hours. Enter Yellow System, CS 2 The addition amount is 45%, the temperature is 15 degrees, and the yellowing is 55 minutes. The dissolved alkali is 14 g / L, the temperature is 6.3 degrees, and the circulation dissolves for 1.5 hours after the initial dissolution. Degassing, filtering, and aging for a total of 9.5 hours.

[0032] Gained spinning dope composition:

[0033] Methyl fiber content: 6.6%, degree of esterification: 72, viscosity: 111S, alkali con...

Embodiment 2

[0041] This example is a production method of modal fiber, using cotton pulp with a cellulose content of 97.8% and a degree of polymerization of 842DP, soaking with an alkali concentration of 232 g / L for 31 minutes, adding Swedish AkzoNobel during the soaking process The Berol Visco 388 additive produced by the company is added in an amount of 0.2% of the weight of methylcellulose in the porridge. Alkali cellulose with an alkali to cellulose ratio of 0.74 is obtained after pressing. The alkali cellulose was aged at 18 degrees for 5.5 hours. Enter Yellow System, CS 2 The addition amount is 42%, the temperature is 18 degrees, and the yellowing is 50 minutes. The dissolved alkali is 12 g / L, the temperature is 8.2 degrees, and the circulation is dissolved for 1.5 hours after the initial dissolution. Degassing, filtering, and aging for a total of 9 hours.

[0042]Gained spinning dope composition:

[0043] Methyl fiber content: 6.8%, degree of esterification: 78, viscosity: 121...

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PUM

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Abstract

The invention relates to a method for producing modal fiber from cotton pulp. According to the invention, cotton pulp with alpha-cellulose content no less than 97% is processed through processes of alkaline leaching, expressing, aging, yellowing, and the like, such that a spinning stock solution is prepared; an annular spinneret and a wet spinning method are adopted, such that modal fiber is produced. In a plurality of processes, auxiliary agents produced in Akzo Nobel N.V in Sweden are added; and a negative drafting technology is adopted on the spinneret drafting part. According to the invention, cotton pulp is adopted as a main material; the technical method is scientific; wearability of the modal fiber produced with the method is good; and weaving strength of the modal fiber is high. Fabric produced from the fiber is comfortable to wear, and doses not irritate skins. The method is better than existing methods.

Description

technical field [0001] The invention relates to a method for producing fiber, in particular to a method for producing modal fiber with cotton pulp as the main raw material. Background technique [0002] Ordinary viscose staple fiber is the most important regenerated cellulose fiber made of natural cellulose. It has good wearability and wide application fields, but it also has some serious disadvantages, mainly severe swelling in wet state, low wet strength, wet mold The amount is low, which leads to poor washing deformation and poor dimensional stability of the fabric. At the same time, ordinary viscose staple fibers are not resistant to alkali. After alkali treatment, the strength and wet modulus decrease obviously, the elongation at break increases, and some dissolve. As a result, the blended fabrics of viscose staple fiber and cotton cannot withstand mercerizing treatment, and the requirements for dyeing conditions are relatively heavy. In order to overcome these shortco...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/08
Inventor 于得友毕绍新张会平于捍江么志高高悦杨爱中赵秀媛郑会廷徐广成
Owner 唐山三友集团兴达化纤有限公司
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