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A method for processing and spinning spandex aqueous waste stock solution

A technology of spandex and dope, which is applied in spinning solution preparation, sustainable manufacturing/processing, rayon recycling, etc. It can solve the problems that there are no reports about spinning back spinning of aqueous waste dope, and achieve good benefits and high mechanical properties and resilience, reducing shipping and handling costs

Active Publication Date: 2021-09-03
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Up to now, there is no relevant report on the re-spinning of aqueous waste stock solution

Method used

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  • A method for processing and spinning spandex aqueous waste stock solution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1 Screening and granulating the waste stock solution to produce solid stock solution particles with a size of 2 to 5 mm;

[0027] 2 Fill the raw liquid particles into the dryer, take them out after drying for 5 hours, and put them into a sealed bag;

[0028] 3 In a melting tank equipped with a stirring device, add 450kg of DMCA solvent and 200kg of solid stock solution particles in sequence, stir and heat up to 50°C, add 0.3kg of viscosity stabilizer solution, add 1.2kg of antioxidant, and prepare a solution after mixing thoroughly And take a sample to detect the concentration; adjust the concentration by adding a solvent to dissolve, and measure the concentration of the stock solution at 31%, with a viscosity of 5500Poise, to prepare a uniform and stable polymerization stock solution;

[0029] 4. After the polymerization stock solution is filtered, it is transferred to the stock solution storage tank and stored for 26 hours to make it mature and stable;

[0030] 5. Co...

Embodiment 2

[0032] 1 Screening and granulating the waste stock solution to produce solid stock solution particles with a size of 10-15mm;

[0033] 2 Fill the raw liquid particles into the dryer, dry for 8 hours, and put them into a sealed bag;

[0034] 3 In a melting tank equipped with a stirring device, add 655kg of DMCA solvent and 303kg of solid stock solution particles in sequence, stir and heat up to 45°C, add 0.5kg of viscosity stabilizer solution, and add 1.3kg of antioxidant, and prepare the pre-mixed solution after mixing thoroughly. Dissolve the solution, and take a sample to detect the concentration; adjust the concentration by adding DMAC to dissolve, and measure the concentration of the stock solution at 31.5%, with a viscosity of 6700Poise, to prepare a uniform and stable polymerization stock solution;

[0035] 4. After the polymerization stock solution is filtered, it is transferred to the stock solution storage tank and stored for 30 hours to make it mature and stable;

...

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Abstract

The invention relates to a method for processing and spinning spandex water-containing waste stock solution. The spandex water-containing waste stock solution is granulated and dried by using a sub-sieve granulator and a dryer to obtain uniform stock solution particles; using the stock solution particle, adding viscosity The stabilizer is melted and matured to obtain a spinning stock solution with stable viscosity and concentration; the spinning stock solution is used to obtain spandex yarns with a denier of 140 or more by winding, which has high production efficiency and environmental protection effects. The stock solution particles are provided with particles required for stock solution melting through screening, granulation, drying and other processes; the melting device is used to melt stock solution particles into a high-uniform spandex stock solution through stock solution melting tanks and stock solution storage tanks.

Description

technical field [0001] The invention relates to a method for processing and spinning spandex aqueous waste stock solution, and belongs to the field of manufacturing and developing recycled polymer materials. Background technique [0002] Polyurethane elastic fiber material has the characteristics of high breaking strength, high breaking elongation and good elastic recovery at room temperature. Polyurethane elastic fibers with a denier of 140 and above are widely used in textile fields such as ribbons and meshes due to their excellent mechanical strength and good resilience, and have good market prospects. However, the redevelopment and utilization of the waste stock solution produced in production can better digest solid waste and have good ecological and environmental protection benefits. [0003] Domestically, there are few reports on the utilization of spinning waste stock solution from spandex production, and the more mature industrialization schemes mainly focus on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94D01F1/10D01F13/04D01D1/02
CPCD01D1/02D01F1/10D01F6/94D01F13/04Y02P70/62
Inventor 陈亦跑周建军阮晓岳李霞袁昆山
Owner ZHEJIANG HUAFENG SPANDEX
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