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Meltable fluorine-containing resin filament and production method thereof

A fluorine-containing resin, monofilament technology, applied in the manufacture of rayon, single-component halogenated hydrocarbon rayon, textiles and papermaking, etc., can solve the problems of poor production efficiency and performance, poor performance and low production efficiency, etc. Achieve excellent production efficiency and performance, and maintain the effect of heat resistance

Inactive Publication Date: 2015-03-25
杭州费尔过滤技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Obviously, there is a contradiction between the existing technology in terms of production efficiency and performance optimization. Either the production efficiency is high but the performance is poor, or the performance is excellent but the production efficiency is low and the cost is high. It is difficult to find a balance between production efficiency and performance. , and even result in poor production efficiency and performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA) containing 3 mol% of perfluoropropyl vinyl ether (PPVE) and perfluoroethylene propylene (FEP) with a melting point of 260°C were prepared at a mass ratio of 95:5 Mixed and sent to twin-screw extruder, extruded at a speed of 38r / min, the temperature of each zone is 60 ° C, 230 ° C, 280 ° C, 310 ° C, 310 ° C, through the metering pump (metering pump flow rate: 28g / min), spinning assembly (spinning assembly temperature: 330°C), spinneret (spinning opening length-to-diameter ratio L / D: 20, spinning opening diameter: 0.5mm), and multi-layer cooling (air cooling temperature : 30°C, air cooling distance: 20mm, water bath cooling temperature: 50°C, water cooling distance: 1000mm), pulled at a speed of 80 m / min, through three-stage stretching, heat setting, and wound at a speed of 200m / min The properties of the finished silk are shown in Table 1.

Embodiment 2

[0027] Tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA) containing 3 mol% of perfluoropropyl vinyl ether (PPVE) and perfluoroethylene propylene (FEP) with a melting point of 260°C were prepared at a mass ratio of 99:1 Mixed and sent to twin-screw extruder, extruded at a speed of 38r / min, the temperature of each zone is 60 ° C, 230 ° C, 280 ° C, 310 ° C, 310 ° C, through the metering pump (metering pump flow rate: 28g / min), spinning assembly (spinning assembly temperature: 330°C), spinneret (spinning opening length-to-diameter ratio L / D: 20, spinning opening diameter: 0.5mm), and multi-layer cooling (air cooling temperature : 30°C, air cooling distance: 20mm, water bath cooling temperature: 50°C, water cooling distance: 1000mm), pulled at a speed of 80 m / min, through three-stage stretching, heat setting, and wound at a speed of 200m / min The properties of the finished silk are shown in Table 1.

Embodiment 3

[0029] Tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA) containing 3 mol% of perfluoropropyl vinyl ether (PPVE) and low molecular weight polytetrafluoroethylene (L-PTFE) with a melting point of 285°C were used in a mass ratio of 95:5 for mixing, and sent to the twin-screw extruder, extruded at a speed of 38r / min, the temperature of each zone is 60 ° C, 230 ° C, 280 ° C, 310 ° C, 310 ° C, through the metering pump (metering pump Flow rate: 28g / min), spinning assembly (spinning assembly temperature: 350°C), spinneret (spinning hole length-to-diameter ratio L / D: 20, spinning hole diameter: 0.5mm), and then multi-level cooling (Air cooling temperature: 30°C, air cooling distance: 20mm, water bath cooling temperature: 50°C, water cooling distance: 1000mm), pulling at a speed of 50 m / min, through three-stage stretching and heat setting, at a speed of 150m / min The finished silk is obtained by speed winding, and the properties are shown in Table 1.

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Abstract

The invention relates to a meltable fluorine-containing resin filament and a production method thereof. Present preparation technologies of polytetrafluoroethylene-perfluoroalkyl vinyl ether (PFA) filaments have various disadvantages, and practical processing application cannot reach ideal effects. The meltable fluorine-containing resin filament comprises 90-99wt% of PFA and 1-10wt% of fluorine-containing resin with a low melting point, and the filament with excellent performances is obtained through a certain process. The fluorine-containing resin filament with excellent performances is prepared at a low spinning temperature under a high spinning speed, and has an optimum performance / efficiency ratio. The meltable fluorine-containing resin filament is mainly suitable for filtering webs.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a fusible fluorine-containing resin monofilament and a manufacturing method thereof. Background technique [0002] Polytetrafluoroethylene (Polytetrafluoroethylene, PTFE) is a fluorine-containing polymer material with special properties. Its molecular chain structure is composed of completely symmetrical fluorine atoms completely wrapping the central carbon chain. It has a series of excellent characteristics such as chemical inertness in acid-base reaction, good high and low temperature stability, excellent insulation and anti-ultraviolet radiation, low friction coefficient, and low water absorption. [0003] PTFE fiber has a wide range of application prospects, but because of its melt viscosity as high as 10 8 Pa·s, much higher than the viscosity of general melt spinning (less than 10 6 Pa s), and there is no suitable solvent for solution spinning, but can only be prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/48D01F1/10D01D13/00
Inventor 於挺张佳欢钱志江
Owner 杭州费尔过滤技术有限公司