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Preparation device for fluorine-containing polymer fully drawn yarns

A technology of fully drawn yarn and preparation device, which is applied in the directions of drawing spinning, melting of filament raw materials, and complete sets of equipment for producing artificial yarns, can solve the problems of increased environmental burden, poor fluidity, and high melt viscosity, etc. Achieve the effect of strengthening heat setting, improving dimensional stability and reducing heat shrinkage

Inactive Publication Date: 2021-06-18
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when used as a sewing thread in the sewing of bag filters, the cross-section of the split fiber of the film is flat, which often brings certain difficulties to the sewing process.
In addition, although the cross-section of the polytetrafluoroethylene fiber produced by the polytetrafluoroethylene paste method is close to a circle, it will increase the burden on the environment because of the removal of various additives during the preparation of the paste in the later stage of production, and The PTFE paste method also affects the continuous, large-scale and automatic production process.
Due to the special structure of fluorine-containing polymers, it has high melting point, high melt viscosity, poor fluidity, and corrosive gas will be released during the melting process, which brings certain difficulties to the melt spinning process, so a kind of suitable for industrial production is designed. The preparation device of fluoropolymer fiber is imminent

Method used

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  • Preparation device for fluorine-containing polymer fully drawn yarns
  • Preparation device for fluorine-containing polymer fully drawn yarns
  • Preparation device for fluorine-containing polymer fully drawn yarns

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The polyperfluoroethylene propylene resin chip is used as a raw material, and the polyperfluoroethylene propylene fiber is prepared on the device. Feed the FEP resin chips into the hopper of the screw extruder 1, melt in the screw extruder 1, pass through the pump base 3, the metering pump 4, the pump base 3, and the melt pipeline, and extrude from the spinneret 5 The melt stream is formed; the melt stream passes through the suction device 6, the spinning shaft 7, and the upper oiler 8 vertically downwards, passes through the godet 9 in a tangential direction, and is wound on the first stretching roller 10 to form a primary The fiber is stretched, relaxed, heat-set, and wound to obtain the finished fiber. The corrosive gas produced is treated and discharged through the suction device 6.

[0034] The screw extruder 1 heating zone is divided into three zones, the temperature of the feeding zone is 240-260°C, the temperature of the compression zone is 360-380°C, the tempe...

Embodiment 2

[0037] The polyperfluoroethylene propylene resin chip is used as a raw material, and the polyperfluoroethylene propylene fiber is prepared on the device. The spinning process is the same as in Example 1.

[0038] Among them, the screw heating zone is divided into three zones, the temperature of the feeding zone is 250°C, the temperature of the compression zone is 370°C, and the temperature of the metering zone is 375°C; the temperature of the spinneret 5 is 375°C; the speed of the metering pump 4 is 8r / min; 8. The rotating speed is 10r / min; the temperature of the spinning tunnel 7 is 70°C; the temperature of the first stretching roll 10 is 160°C, and the speed is 100m / min; the temperature of the second stretching roll 11 is 165°C, and the speed is 220m / min; The temperature of the third stretching roll 12 is 180°C and the speed is 210m / min; the temperature of the relaxation heat setting roll 13 is 175°C and the speed is 190m / min; the speed of the winding machine 14 is 185m / min;...

Embodiment 3

[0041] Using polyvinylidene fluoride resin chips as raw materials, polyvinylidene fluoride fibers are prepared on the device. The spinning process is the same as in Example 1.

[0042] The screw heating zone is divided into three zones, the temperature of the feeding zone is 160-180°C, the temperature of the compression zone is 235-255°C, the temperature of the metering zone is 240-260°C; the temperature of the spinneret 5 is 240-260°C; the metering pump 4 The rotating speed is 10-12r / min; the rotating speed of the upper oil tanker 8 is 10-12r / min; the temperature of the spinning shaft 7 is 50-60°C; the temperature of the first drawing roller 10 is 95-110°C, and the speed is 150-170m / min The temperature of the second stretching roll 11 is 110~130°C, and the speed is 410~430m / min; the temperature of the third stretching roll 12 is 115~135°C, and the speed is 420~440m / min; 110-130°C, the speed is 360-380m / min; the speed of the winding machine 14 is 345-365m / min; the speed of th...

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Abstract

The invention discloses a preparation device for fluorine-containing polymer fully drawn yarns. The preparation device for the fluorine-containing polymer fully drawn yarns comprises a screw extruder, a spinning box, a suction device, a spinning channel, an oiling wheel, a godet wheel, a first drawing roller, a second drawing roller, a third drawing roller, a relaxation heat setting roller and a winding machine, wherein a metering pump and a spinning nozzle are integrated in the spinning box. According to the preparation device for the fluorine-containing polymer fully drawn yarns, the relaxation heat setting roller is additionally arranged and used for controlling shrinkage heat setting of fibers, internal stress of the fibers is relaxed, the heat shrinkage rate of the fibers is reduced, the creep resistance of the fibers is improved, the heat setting effect of the fibers is enhanced, and the size stability of the fibers is improved; the fluorine-containing polymer fully drawn yarns can be produced by a spinning-drawing-heat setting-winding one-step method, the device has the characteristics of high temperature resistance and corrosion resistance, the production process is simple and convenient, the production efficiency is high, and a basis is provided for industrial preparation of fluorine-containing polymer fibers.

Description

technical field [0001] The invention relates to the field of manufacturing equipment for chemical fibers, in particular to a preparation device for fully drawn fluoropolymer yarns. Background technique [0002] With the continuous advancement of science and technology and the improvement of living standards, the requirements for environmental protection are also getting higher and higher. Fluoropolymer fiber has good properties of anti-environment, high temperature resistance, low friction, self-cleaning, etc., so it can be used in high temperature, high humidity, high viscosity dust industry and industrial fume purification with acid, alkali and corrosive chemical gases , and can also be used as a preparation material for bag filters such as coal-fired furnaces, oil-fired boilers, and waste incinerators, and is playing an increasingly important role in the field of high-temperature corrosive flue gas filtration. [0003] The most used fluoropolymer fiber is polytetrafluoro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D13/00D01D13/02D01F13/04D01D10/02D01D4/02D01D5/16D01D1/04
CPCD01D1/04D01D4/02D01D5/16D01D10/02D01D13/00D01D13/02D01F13/04Y02P70/62
Inventor 肖长发安树林闫静静陈凯凯王纯
Owner SHANGHAI UNIV OF ENG SCI
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