Preparation method of novel polyoxymethylene fibers

A polyoxymethylene fiber, a new technology, applied in the direction of fiber chemical characteristics, melt spinning, stretch spinning, etc., can solve the problems of increasing the difficulty of preparing polyoxymethylene fibers

Active Publication Date: 2015-04-08
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem in the prior art that the spinnability of POM is adjusted by controlling the content of comonomers, and a special process is adopted, wh

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The polyoxymethylene raw material containing 5.00% mass fraction crystallization inhibitor is selected for use, and its tensile yield strength is 750kgf / cm 2 , with a notched Izod impact strength of 8.0kgf cm / cm; the spinning process is as follows: POM raw materials are added to the hopper, passed through the screw extruder, melt filter, spinning box and components, and cooled by side blowing to obtain primary fibers , and then after drafting and heat setting, the finished fiber is finally obtained. Among them, the temperatures of the screw inlet, melting section, metering section and compression section during spinning are 150°C, 190°C, 210°C, and 225°C respectively; the winding speed of the pre-spinning is 400m / min. After the as-spun fiber is wound, the static stop condition is 48 hours, and the temperature is 5°C. Four-stage drafting, in which the first-stage drafting ratio is 95% of the total multiple, and the temperatures of the second, third, and fourth-stage dra...

Embodiment 2

[0026] Select the polyoxymethylene raw material containing 0.01% mass fraction crystallization inhibitor, and its tensile yield strength is 600kgf / cm 2, with a notched Izod impact strength of 7.0kgf cm / cm; the spinning process is as follows: POM raw materials are added to the hopper, passed through the screw extruder, melt filter, spinning box and components, and cooled by side blowing to obtain primary fibers , and then after drafting and heat setting, the finished fiber is finally obtained. Among them, the temperatures of the screw inlet, melting section, metering section and compression section during spinning are 135°C, 210°C, 215°C, and 240°C respectively; the winding speed of the pre-spinning is 50m / min. After the as-spun fiber is wound, the static stop condition is 2 hours, and the temperature is 40°C. Four-stage drafting, in which the first-stage drafting ratio is 85% of the total multiple, and the temperatures of the second, third, and fourth-stage drafting are 150°C...

Embodiment 3

[0028] The polyoxymethylene raw material containing 1.2% mass fraction crystallization inhibitor is selected for use, and its tensile yield strength is 900kgf / cm 2 , with a notched cantilever beam impact strength of 10.5kgf cm / cm; the spinning process is as follows: POM raw materials are added to the hopper, passed through the screw extruder, melt filter, spinning box and components, and cooled by side blowing to obtain primary fibers , and then after drafting and heat setting, the finished fiber is finally obtained. Among them, the temperatures of the screw inlet, melting section, metering section and compression section during spinning are 152°C, 197°C, 200°C, and 212°C respectively; the winding speed of the pre-spinning is 300m / min. After the as-spun fiber is wound, the static stop condition is 24 hours, and the temperature is 20°C. Four-stage drafting, in which the first-stage drafting ratio is 91% of the total multiple, and the temperatures during the second, third, and ...

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Abstract

The invention relates to a preparation method of novel polyoxymethylene fibers. The preparation method of the novel polyoxymethylene fibers adopts a two-step-method spinning technology and selects a polyformaldehyde raw material containing a crystallization inhibitor; the requirements on the tensile strength and the impact performance are provided; and high-strength and high-modulus polyoxymethylene (POM) fibers are prepared through controlling a spinning temperature, keeping a lower preparatory spinning speed, and controlling static stopping conditions of nascent fibers and a rear path drawing process with the help of a high-pressure heat treatment process. The preparation method of the novel polyoxymethylene fibers does not need to control the content of copolymerized monomers by a polymerization process and can obtain the high-strength and high-modulus POM fibers without excessive demands on equipment.

Description

technical field [0001] The invention relates to a preparation method of novel polyoxymethylene fibers. Background technique [0002] Polyoxymethylene, also known as polyoxymethylene (POM), is a crystalline polymer material with a crystallinity of more than 70%, insoluble in water, acetone, and alkaline solutions, and extremely difficult to dissolve in dilute acid solutions. It has good comprehensive performance, strength, rigidity, impact strength and creep resistance, excellent colorability, and good fatigue resistance. Due to the difficulty in preparing POM fibers, the research on POM in the past mainly focused on thermoplastic engineering plastics, and there are many literatures on the wear resistance of polyoxymethylene. [0003] Inheriting the excellent properties of POM raw materials, POM fiber has high strength and high modulus, excellent wear resistance, alkali resistance, and high elongation recovery characteristics; especially POM fiber has excellent impact durabi...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10D01D5/08D01D5/12D01D10/02
Inventor 阳知乾刘建忠刘加平徐德根李林吕进张丽辉韩方玉
Owner JIANGSU SOBUTE NEW MATERIALS
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