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Method for producing flame retardant fiber with vinylon production line and obtained flame retardant fiber

A flame-retardant fiber and production line technology, applied in the field of flame-retardant fibers, can solve the problems of flame-retardant vinylon hue, fineness, and hand feeling that are difficult to meet various needs.

Active Publication Date: 2019-10-15
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, because vinylon has to withstand strong acidic and alkaline processing environments during processing, and high-temperature setting environments as high as 230°C, there are few flame retardants that can withstand the above environments and have good spinnability and flame retardancy; The hue, fineness, hand feeling and other properties of the prepared flame-retardant vinylon are still difficult to meet the needs of many aspects; and even if the high-strength flame-retardant vinylon has not yet reached the ideal level, the current price is about 80,000 yuan / ton

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 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 tetrakis hydroxymethyl phosphorus 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 defoam and then passed through the Glauber's salt wet spinning process route, and the as-spun fiber is obtained by coagulation and stretching, and the as-spun fiber is 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 concentration is ≥ 90% by volume, the ammonia fumigation temperature is 60°C, and th...

Embodiment 2

[0027]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-mentioned fibers are sent to ammonia fumigation equipment for ammonia fumigation, the ammonia concentration is ≥ 95% by volume, the ammonia fumigation te...

Embodiment 3

[0029] 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 75% by weight tetrakis hydroxymethyl phosphorus chloride-urea condensate aqueous solution 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-mentioned fibers are sent to ammonia fumigation equipment for ammonia fumigation, the ammonia gas concentration is ≥ 90% by volume, the ammon...

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Abstract

The invention relates to a method for producing a flame-retardant fiber from a vinylon production line and an obtained flame-retardant fiber. The method comprises the following steps: a) dissolving polyvinyl alcohol in water so as to obtain a spinning solution; b) adding an aqueous solution of a tetrahydroxymethyl phosphorus compound; c) spinning by using a mirabilite wet method, and performing condensation and stretching so as to obtain a primary fiber; d) drying the primary fiber obtained in the step c) so as to obtain a flame-retardant precursor fiber; e) performing ammonia fumigation on the flame-retardant precursor fiber obtained in the step d) so as to obtain an ammonia fumigation fiber; f) oxidizing the ammonia fumigation fiber obtained in the step e); and g) randomly performing washing, oiling and drying, thereby obtaining the flame-retardant fiber.

Description

technical field [0001] The invention relates to a method for producing flame-retardant fibers with a vinylon production line and the obtained flame-resistant fibers. 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 vinylon (also known as vinylon) produced after acetalization Vinylon) fiber can withstand high temperature and wet conditions in dyeing and finishing processing, and its products have the advantages of high strength, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/50D01F1/07D01F11/06
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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