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High-strength polyvinyl alcohol fiber for yarn and preparation method and application of high-strength polyvinyl alcohol fiber

A technology of polyvinyl alcohol fiber and polyvinyl alcohol, which is applied in the direction of fiber chemical characteristics, wet spinning method, stretch spinning method, etc., can solve the problems of poor hot water resistance of fibers, affecting fiber application, and easy breakage of spinning, etc., to achieve The effect of high yarn tenacity, good crimp stability and high crimp count

Inactive Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are all based on wet production. Although the strength and modulus of the fiber have been greatly improved, the fiber has poor hot water resistance, low elongation, and easy to break when spinning, so it cannot be used as work clothes, tents, backpacks or training clothes. etc., thus directly affecting the application of fibers in the textile field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The polyvinyl alcohol fiber is prepared from the following raw materials according to the following proportions: 20 kg of polyvinyl alcohol with a degree of polymerization of 3400-3500 and an alcoholysis degree of 99.0 mol%, 1.2 kg of boric acid and 120 kg of deionized water.

[0065] The preparation method of the polyvinyl alcohol fiber, the concrete steps are:

[0066] (1) Preparation of spinning stock solution: add polyvinyl alcohol, boric acid and deionized water into a stainless steel dissolving kettle, dissolve for 7 hours at a system pressure of 0.15 MPa and a temperature of 105-115 °C under stirring, and transport it through a pump. Filtration and defoaming at 98°C for 8 hours to obtain spinning stock solution;

[0067] (2) Spinning: The spinning dope is metered by a metering pump and then sent to a spinneret with a diameter of 0.06-0.15mm, a number of holes of 11,000, and a drafting ratio of 1.5 times for spinning, and the ejected dope is a fine stream. Into t...

Embodiment 2

[0078] The polyvinyl alcohol fiber is prepared from the following raw materials according to the following proportions: 20 kg of polyvinyl alcohol with a degree of polymerization of 3400-3500 and an alcoholysis degree of 98.0 mol%, 1.2 kg of nanomontmorillonite and 110 kg of deionized water.

[0079] The preparation method of the polyvinyl alcohol fiber, the concrete steps are:

[0080] (1) Preparation of spinning stock solution: Add polyvinyl alcohol, nano-montmorillonite and deionized water into a stainless steel dissolving kettle, and dissolve for 8 hours at a system pressure of 0.12 MPa and a temperature of 105-115 °C under stirring for 8 hours. , filtered by pump and defoamed at 97°C for 7h to obtain spinning dope;

[0081] (2) Spinning: the spinning dope is metered by a metering pump and sent to a spinneret with a diameter of 0.12 mm, a number of holes of 5000, and a drafting ratio of 2.0 times for spinning, and the ejected dope stream enters solidification In the bath,...

Embodiment 3

[0092] The polyvinyl alcohol fiber is prepared from the following raw materials according to the following proportions: 20 kg of polyvinyl alcohol with a degree of polymerization of 2600 and an alcoholysis degree of 95.0 mol%, 0.5 kg of ammonium titanyl sulfate and 100 kg of deionized water.

[0093] The preparation method of the polyvinyl alcohol fiber, the concrete steps are:

[0094] (1) Preparation of spinning stock solution: add polyvinyl alcohol, ammonium titanyl sulfate and deionized water into a stainless steel dissolving kettle, and dissolve for 8 hours under the conditions of a system pressure of 0.10 MPa and a temperature of 100-105 °C under stirring. Filtration by pump and defoaming at 97°C for 7 hours to obtain spinning dope;

[0095] (2) Spinning: The spinning dope is metered by a metering pump and then sent to a spinneret with a diameter of 0.10 mm, 8,000 holes, and a drafting ratio of 3 times for spinning, and the ejected dope stream enters solidification In t...

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Abstract

The invention belongs to the technical field of synthesizing polymer artificial filaments and analogues through unsaturated alcohol polymers and particularly relates to a high-strength polyvinyl alcohol fiber for yarn. The polyvinyl alcohol fiber comprises polyvinyl alcohol, an auxiliary and deionized water, wherein the auxiliary is boric acid or montmorillonite or titanium salt. The polyvinyl alcohol fiber has a smooth surface, a round section, high strength, high elongation, excellent hot water resistance, a large number of crimps and good crimp stability; when the polyvinyl alcohol fiber isused for spinning and weaving, yarn strength is high; and the polyvinyl alcohol fiber can be used for making work clothes, tents, backpacks or training clothes.

Description

technical field [0001] The invention belongs to the technical field of synthesizing polymer man-made filaments and the like with unsaturated alcohol polymers, and in particular relates to a high-strength polyvinyl alcohol fiber for yarn and a preparation method and application thereof. Background technique [0002] Training clothes and work clothes are general personal protective equipment. Although they do not require special protection functions such as fire prevention, bulletproof and chemical resistance, they are required to protect against mechanical damage such as collision and friction, and to isolate sludge, water stains and other contaminants in the workplace. pollution to human body. At the same time, training clothes and workwear are required to be comfortable and durable, so that they can have a long service life in harsh operating environments. Early training suits and workwear materials were pure cotton fabrics, which had low strength and were easily damaged. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50D01F1/10D01F11/06D01D5/06D01D5/12D01D10/02
CPCD01F6/50D01F1/10D01F11/06D01D5/06D01D5/12D01D10/02
Inventor 李海英何云王华全冷平刘婵
Owner CHINA PETROLEUM & CHEM CORP