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Method for producing flame-retardant and antibacterial fibers and obtained flame-retardant antibacterial fibers

A technology of antibacterial fiber and primary fiber, which is applied in the manufacture of fire-resistant and flame-retardant filaments, chemical post-treatment of synthetic polymer artificial filaments, etc., can solve the problem of reduced tear strength, decreased fabric breaking strength, and the impact of flame-retardant processing technology applications, etc. question

Inactive Publication Date: 2018-01-19
宁夏全宇新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest disadvantage of Proben finishing is that the breaking strength of the finished fabric decreases significantly, usually reaching a 20% reduction; especially the tear strength is significantly reduced
Therefore, the application of this kind of flame retardant processing technology has been seriously affected.

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

[0027] Dissolve 100 parts of polyvinyl alcohol 1799 in water at 95°C to prepare a spinning stock solution with a solid content of 15% by weight, and cool the stock solution to 70°C. Add 25 parts of 80% by weight tetrakishydroxymethylphosphorus chloride aqueous solution into the above spinning stock solution by stock solution blending, keep the stock solution temperature at 70° C., and stir evenly to obtain a blended spinning stock solution. The above-mentioned blended spinning stock solution is left to stand for defoaming, and then passed through the Glauber's salt wet spinning process route, coagulated and stretched to obtain primary fibers, and the primary fibers are dried at 80°C for 20 minutes to obtain a fiber with a moisture content of 10-20% by weight. Flame retardant precursor fiber. The above-mentioned fibers are sent to ammonia fumigation equipment for ammonia fumigation, the ammonia gas concentration is 55% by volume, the ammonia fumigation temperature is 70°C, and ...

Embodiment 2

[0029] Dissolve 100 parts of polyvinyl alcohol 2099 in water at 98°C to prepare a spinning stock solution with a solid content of 17% by weight, and keep the spinning stock solution at 95°C for degassing for later use. 40 parts of 55% by weight tetrakis hydroxymethyl phosphorus sulfate aqueous solution were stored in the pre-spinning injection additive cartridge. The polyvinyl alcohol spinning stock solution and the tetrakis hydroxymethyl phosphorus sulfate aqueous solution are continuously mixed through the pre-spinning injection mixing device, and then through the mirabilite wet spinning process route, the primary fiber is obtained by coagulation and stretching, and the primary fiber is conditioned at 100 ° C Dry for 15 minutes to obtain a flame-retardant precursor fiber with a moisture content of 15-20% by weight. The above fibers are sent to ammonia fumigation equipment for ammonia fumigation, the ammonia gas concentration is 70% by volume, the ammonia fumigation temperatu...

Embodiment 3

[0031] Dissolve 100 parts of polyvinyl alcohol 1799 in water at 95°C to prepare a spinning stock solution with a solid content of 15% by weight, and cool the stock solution to 65°C. Add 30 parts of a 75% by weight aqueous solution of tetrakishydroxymethylphosphorus chloride into the above-mentioned spinning stock solution by stock solution blending, keep the stock solution temperature at 65° C., and stir evenly to obtain a blended spinning stock solution. The above-mentioned blended spinning stock solution is left to stand for defoaming, and then passed through the Glauber's salt wet spinning process route, and then coagulated and stretched to obtain as-spun fibers, and the as-spun fibers are dried at 75°C for 15 minutes to obtain a fiber with a moisture content of 18-25% by weight. Flame retardant precursor fiber. The above fibers are sent to ammonia fumigation equipment for ammonia fumigation, the ammonia gas concentration is 85% by volume, the ammonia fumigation temperature...

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Abstract

The invention relates to a method for producing flame-retardant and antibacterial fibers and the obtained flame-retardant antibacterial fibers. The method comprises the following steps: a) dissolvingpolyvinyl alcohol in water to obtain spinning dope; b) applying an aqueous solution of a tetrakis(hydroxymethyl)phosphonium compound; c) performing spinning with a mirabilite wet method, and performing solidification and stretching to obtain nascent fibers; d) drying the nascent fibers obtained in step c) to obtain flame-retardant precursor fibers; e) performing ammonia fumigating on the flame-retardant precursor fibers obtained in step d) to obtain ammonia fumigated fibers; f) oxidizing the ammonia fumigated fibers obtained in step e); g) performing washing, oiling and drying optionally to obtain the flame-retardant and antibacterial fibers, wherein during ammonia fumigation in the step e), ammonia gas is applied in an insufficient amount relative to that of the tetrakis(hydroxymethyl)phosphonium compound applied in step b), so that part of the tetrakis(hydroxymethyl)phosphonium compound in the fibers does not react with the ammonia gas.

Description

technical field [0001] The invention relates to a method for producing a flame-retardant antibacterial fiber and the obtained flame-resistant antibacterial fiber, more particularly, the present invention relates to a method for producing a flame-resistant antibacterial fiber and the obtained flame-resistant antibacterial fiber by using a tetrahydroxymethyl phosphorus compound. Background technique [0002] Polyvinyl alcohol (PVA) has a wide range of raw material resources and can be produced from natural gas, calcium carbide, petroleum and other resources. PVA fiber is produced by wet spinning method, the technical requirements for processing equipment are relatively low, and the processing cost is relatively low. In the conventional vinylon preparation method, the PVA fiber is acetalized through the reaction of formaldehyde and two adjacent hydroxyl groups, and the hydroxyl content in the fiber is reduced after a large number of hydroxyl groups are blocked, so that the viny...

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): D01F6/50D01F1/10D01F1/07D01F11/06
Inventor 施楣梧刘三民叶光斗姜猛进
Owner 宁夏全宇新材料有限公司
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