Preparation method of medium modulus polyvinyl alcohol fiber

A fiber and modulus technology, applied in the field of preparation of polyvinyl alcohol fibers, can solve the problems of high operation risk, long washing time, and no advantages, and achieves low cost, improved physical and mechanical properties, and improved uniformity and quality. Effect

Active Publication Date: 2013-04-24
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-strength and high-modulus fiber spinning process is that the PVA stock solution added with boric acid is cross-linked and formed through an alkali bath (sodium hydroxide and sodium sulfate solution), and then cross-linked by an acid bath (a mixed solution of sulfuric acid and sodium sulfate), and then processed. Washing for a long time, and finally high-modulus PVA fiber is obtained by high-power heat stretching. This method produces a fiber modulus above 180cN / dtex; but its biggest disadvantage is that strong acid and alkali are involved in the spinning process, and the operation is dangerous. High resistance; washing time is very long and energy consumption is high, so this method has no advantage when preparing some medium modulus fibers
However, the application of montmorillonite in the preparation of PVA fibers has not been reported yet.

Method used

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  • Preparation method of medium modulus polyvinyl alcohol fiber
  • Preparation method of medium modulus polyvinyl alcohol fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 15 kg of PVA with a degree of polymerization of 1750±50 and a degree of alcoholysis of 95 mol%, 0.3 kg of 1500 mesh calcium-based montmorillonite, 0.1 kg of OP-10 additive, and 84 kg of water into the dissolving kettle. 98±2℃, pressure 0.01MPa, 4 hours after dissolving, filter by pump, defoaming under normal pressure for 18 hours, defoaming temperature of 97℃, the temperature of spinning dope is 97℃, measured by metering pump, the pore diameter is Spinneret spinneret of 0.10mm, 6000 holes, coagulated and formed in Glauber's salt coagulation bath, and the spinneret stretched -0.5 times. The spun nascent fiber was wet-heated, dried, stretched, and heat-set, the total stretched 6 times, The obtained fiber has a linear density of 3.1 dtex and a Young's modulus of 118 cN / dtex.

Embodiment 2

[0031] Add 15kg of PVA with a degree of polymerization of 1750±50 and a degree of alcoholysis of 99mol%, 0.3kg of 1800 mesh sodium-based montmorillonite, 0.2kg of TX-100 additive, and 84kg of water into the dissolving kettle. 98±2℃, pressure 0.02MPa, dissolve for 3 hours, filter by pump, defoam for 4 hours under normal pressure, defoam temperature 97℃, make spinning dope temperature 97℃, measure by metering pump, through pore size: Spinneret with a diameter of 0.10mm, 6000 holes, coagulated and formed in Glauber's salt coagulation bath, and the spinneret is stretched -0.2 times. The spun nascent fiber is wet-heated, dried, stretched, and heat-set, and the total stretch is 9 times. The obtained fiber has a linear density of 2.2 dtex and a Young's modulus of 160 cN / dtex.

Embodiment 3

[0033] Add 15kg of PVA with a degree of polymerization of 1850±50 and a degree of alcoholysis of 99mol%, 0.6kg of 3000 mesh sodium-based montmorillonite, 0.2kg of TX-100 additive, and 85kg of water into the dissolving kettle. 108±2℃, pressure 0.03MPa, dissolve for 6 hours, filter by pump, defoaming under normal pressure for 16 hours, defoaming temperature 97℃, the temperature of the spinning dope is 97℃, measured by the metering pump, the aperture is The spinneret of 0.08mm, 8000 holes spins, solidified and formed in Glauber's salt coagulation bath, the spinneret is stretched 0.1 times, and the spun nascent fiber is wet-heated, dried, stretched, and heat-set. The total stretch is 9 times. The resulting fiber has a linear density of 1.8 dtex and a Young's modulus of 198 cN / dtex.

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Abstract

The invention relates to a preparation method of a medium modulus polyvinyl alcohol (PVA) fiber. The invention is characterized in that the fiber comprises the following raw materials: 100 parts of PVA, 1-20 parts of montmorillonite and 400-800 parts of water. Compared with the process of high strength and high modulus PVA fiber, the preparation method of the PVA fiber provided in the invention has the characteristics of simple operation, low cost and greater environmental friendliness, thus being especially suitable for large-scale industrial production. The PVA fiber prepared by the invention has a linear density of 1.0-10.0dtex, dry breaking strength of 6.0-10.0cN / dtex, breaking elongation of 6-20%, and a Young's modulus of 110-200cN / dtex, thus being very suitable for application in the construction field or industrial fabrics.

Description

Technical field [0001] The invention relates to a method for preparing polyvinyl alcohol fibers, in particular to a method for preparing medium modulus polyvinyl alcohol fibers. Background technique [0002] Polyvinyl alcohol fiber (hereinafter referred to as PVA fiber), as a polymer material with corrosion resistance, weather resistance and good adhesion to the substrate, has a wide range of uses, except for asbestos substitutes, tire cords, and industrial use. Cloth etc. Because of its good tolerance, various functional fillers can be mixed into the PVA stock solution for spinning to meet different market needs. [0003] The method of preparing PVA fiber is mainly wet spinning, which includes conventional wet spinning process and high-strength and high-modulus fiber spinning process. In conventional wet spinning, the PVA stock solution is sprayed from the spinneret, solidified in a saturated sodium sulfate solution, and then processed to obtain fibers. The fiber Young's modulus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50D01D1/02D01D1/10D01D5/06D01D5/12D01D10/02D01D10/06
Inventor 徐小松王建蔡霞张振宇刘婵李利
Owner CHINA PETROCHEMICAL CORP
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