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A kind of silicon nitrogen flame retardant high wet modulus viscose fiber and its preparation method

A high-wet-modulus viscose and fiber technology is applied in the fields of high-wet-modulus viscose fiber and its preparation, silicon-nitrogen flame-retardant high-wet-modulus viscose fiber and its preparation field, and can solve the problem of dry and wet strength and Low wet modulus, poor stability, slow combination of flame retardant and fiber, etc., to achieve high dry and wet strength, improved flame retardant effect, and good spinnability.

Active Publication Date: 2021-10-29
山东银鹰化纤有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process not only solves the problem of slow combination of flame retardant and fiber and poor stability after combination, but also improves the physical and mechanical properties of flame retardant fiber and endows the flame retardant fiber with the characteristics of high wet modulus
[0008] The present invention aims at the application defects of the existing silicon-nitrogen flame retardant fibers with relatively low dry and wet strength and wet modulus. One is to provide a high wet modulus flame retardant fiber; Preparation method of burning fiber

Method used

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  • A kind of silicon nitrogen flame retardant high wet modulus viscose fiber and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0034] 1. Preparation of spinning dope:

[0035] Mix five batches of cotton and wood pulp with a degree of polymerization of about 830 and a cellulose content ≥ 95% in any proportion, then fully mix with the impregnating lye, and pass through 238±1g / L, 50℃ sodium hydroxide alkali solution After soaking for 60 minutes, press to make alkali cellulose; the alkali cellulose is crushed and aged, the aging temperature is 22°C, and the aging time is 1 hour; then it is mixed with CS 2 Mix and carry out yellowing reaction, yellowing temperature is 18°C, yellowing time is 60 minutes, and the amount of carbon disulfide added to methyl cellulose is 34% during yellowing to generate cellulose xanthate; after initial dissolution of cellulose xanthate in dilute alkali solution To obtain the spinning stock solution, add 4.5% denaturant of p-methylcellulose in the later stage of dissolution, which is composed of 3% PEG and 1.5% hydroxyethylamine; the spinning stock solution is followed by post-...

Embodiment 2

[0047] 1. Preparation of spinning dope:

[0048] Five batches of cotton and wood pulp with a degree of polymerization of about 1000 and a cellulose content ≥ 95% are mixed in any proportion and fully mixed with the impregnating lye, and then pressed to make alkali cellulose after impregnation; Crushing, aging treatment, aging temperature 26 ℃, aging time 120min; then with CS 2 Mix for yellowing reaction, yellowing temperature is 19°C, yellowing time is 65min, and the amount of carbon disulfide added to methyl cellulose is 36% during yellowing to generate cellulose xanthate; after initial dissolution of cellulose xanthate in dilute alkali solution To obtain the spinning stock solution, add 3% denaturant of p-methylcellulose in the later stage of dissolution, and its composition is 2% polyoxyethylene alkylphenol ether and 1% cyclohexylamine; the spinning stock solution is successively dissolved and filtered three times , defoaming, and aging to obtain spinning stock solution. ...

Embodiment 3

[0058] 1. Preparation of spinning dope:

[0059] Five batches of cotton and wood pulp with a degree of polymerization of about 1380 and a cellulose content ≥ 95% are mixed in any proportion and fully mixed with the soaking lye. After pulverization, aging treatment, aging temperature: 29 ℃, aging time 210min; and then with CS 2 Mix and carry out yellowing reaction, add 40% of carbon disulfide to methyl fiber during yellowing to generate cellulose xanthate; cellulose xanthate is initially dissolved in dilute alkali solution to obtain spinning stock solution, and add methyl fiber in the later stage of dissolution Fiber 2.5% denaturant, which is composed of 1.5% polyoxyalkylene glycol and 1.0% diethylamine; the spinning stock solution is followed by post-dissolution, three-way filtration, defoaming, and aging to obtain the spinning stock solution. Spinning dope index: methyl fiber: 9.8wt%, containing 8.9% alkali, esterification degree 68, viscosity 85S.

[0060] 2. Two pre-spinn...

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Abstract

The invention provides a silicon-nitrogen flame-retardant high-wet modulus viscose fiber, the dry breaking strength of the fiber is ≥2.6CN / dtex, the wet breaking strength is ≥1.5CN / dtex, the limiting oxygen index is ≥30%, and the wet breaking modulus ≥0.35CN / dtex. The present invention also provides a method for preparing silicon-nitrogen flame-retardant high-humidity viscose fiber, the method comprising: the step of preparing cellulose sulfonate; the step of preparing spinning solution; the second step of injecting before spinning; The step of preparing cellulose sulfonate: subjecting cotton and / or wood pulp with a degree of polymerization of 800 to 1400 to yellowing reaction to generate cellulose xanthate; the step of preparing spinning solution: adding cellulose xanthate to Dissolve in alkaline solution, add denaturant to obtain spinning stock solution, and then make spinning solution; the high wet modulus flame-retardant viscose fiber prepared by the present invention has the characteristics of physical and mechanical properties and high wet modulus, and can be applied It is used in the fields of high-grade textile and clothing fabrics with flame retardant requirements.

Description

technical field [0001] The invention relates to a high wet modulus viscose fiber and a preparation method thereof, in particular to a silicon-nitrogen flame-retardant high wet modulus viscose fiber and a preparation method thereof, belonging to the field of production and preparation of textile raw materials. Background technique [0002] With the rapid development of the reform and opening up for more than 40 years, the consumption level of Chinese people has steadily increased, and the demand for fiber and its products is also increasing day by day. However, when people consume fiber products in large quantities and enjoy the warmth, comfort and beauty it brings to people, the fire caused by the burning of fiber products has also become one of the major disasters in modern society. The results of the investigation of fatal accidents caused by fire show that fires caused by interior decorations and textiles occupy the first place. At the same time, it is found that the harm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/28D01F1/07D01F1/10
CPCD01F1/07D01F1/10D01F2/28
Inventor 徐元斌邱纯利马峰刚郭伟才吴梅彬徐导三
Owner 山东银鹰化纤有限公司
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