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Preparation method of fluorine-containing copolymer fibers

A technology of copolymer and fiber, which is applied in the field of preparation of fluorine-containing copolymer fiber, and achieves the effects of simple process, convenient industrial implementation and stable mechanical properties

Active Publication Date: 2014-05-28
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no literature about the specific preparation process of ECTFE fibers at home and abroad.

Method used

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  • Preparation method of fluorine-containing copolymer fibers
  • Preparation method of fluorine-containing copolymer fibers
  • Preparation method of fluorine-containing copolymer fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Ethylene-chlorotrifluoroethylene copolymer resin (provided by Solvay, USA 500LC product, the same below) placed in a vacuum drying oven at 70°C, dried for 16 hours and then used for later use; the dried resin was sent to a two-zone twin-screw spinning machine, and the spinning temperatures of the first and second twin-screw zones were respectively 265°C and 270°C, the screw speed is 3.0r / min, and the melt is obtained; the melt is extruded through the spinneret assembly at 270°C under the condition of extrusion speed of 0.4m / min, and the melt extruded thing;

[0022] The molten extruded product passed through a 1.0 m long air bath and was wound at a winding speed of 8.5 m / min to obtain ethylene-chlorotrifluoroethylene copolymer fibers.

[0023] In this embodiment, the diameter of the spinneret assembly is 1 mm, the average diameter of the obtained fibers is 214.966 μm, and the average density is 1.885 g / cm 3 , the average linear density is 684.055dTex; the glass trans...

Embodiment 2

[0025] Ethylene-chlorotrifluoroethylene copolymer resin (provided by Solvay, USA 500LC product) placed in a vacuum drying oven at 70°C, dried for 15 hours and then used for later use; the dried resin was sent to a two-zone twin-screw spinning machine, where the spinning temperatures of the first and second twin-screw zones were 265°C, 270°C, the screw speed is 3.0r / min, and the melt is obtained; the melt is extruded through the spinneret assembly at 270°C under the condition of extrusion speed of 0.4m / min, and the molten extrudate is obtained;

[0026] The molten extruded product passed through a 1.0 m long air bath and was wound at a winding speed of 8.5 m / min to obtain ethylene-chlorotrifluoroethylene copolymer fibers.

[0027] The prepared ethylene-chlorotrifluoroethylene copolymer fibers were relaxed and heat-treated in oil baths at three different temperatures of 130°C, 180°C, and 230°C for 30 minutes, taken out, washed, and dried to obtain heat-treated ethylene-trifluor...

Embodiment 3

[0032] Ethylene-chlorotrifluoroethylene copolymer resin (provided by Solvay, USA 500LC product, the same below) placed in a vacuum drying oven at 70°C, dried for 15 hours and then used for later use; the dried resin was sent to a two-zone twin-screw spinning machine, and the spinning temperatures of the first and second twin-screw zones were respectively 265°C and 270°C, the screw speed is 3.0r / min, and the melt is obtained; the melt is extruded through the spinneret assembly at 270°C under the condition of extrusion speed of 0.4m / min, and the melt extruded thing;

[0033] The molten extruded product passed through a 1.0 m long air bath and was wound at a winding speed of 8.5 m / min to obtain ethylene-chlorotrifluoroethylene copolymer fibers.

[0034] The prepared ethylene-chlorotrifluoroethylene copolymer fibers were stretched twice in oil baths at 25°C, 130°C, 180°C, and 230°C respectively, and fixed to length and heat-set for 20 to 40 minutes, then taken out, washed, and ...

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Abstract

The invention discloses a preparation method of fluorine-containing copolymer fibers. The preparation method comprises the steps as follows: 1) dried fluorine-containing copolymer resin is fed into a two-area twin-screw extruder, a melt is obtained through melting under the condition that the temperature of a first area is 240-350 DEG C and the temperature of a second area is 250-360 DEG C, and a melt extrudate is obtained through extrusion molding by a spinning assembly at the temperature of 250-360 DEG C; 2) the melt extrudate is subjected to an air bath of 0.8-1.2 m and then wound under the condition that the spinneret draft ratio is in a range of 20-25 to obtain the fluorine-containing copolymer fibers. According to the method, a melt spinning method is adopted, a fluorine-containing copolymer is extruded after being melted by the twin-screw extruder, the process is simple, the energy is saved, the spinning efficiency is high, and the mass industrial production is facilitated. The fluorine-containing copolymer fibers prepared with the method are good in mechanical property, excellent in chemical resistance and applicable under a harsh condition.

Description

technical field [0001] The invention relates to the field of fiber preparation, in particular to a method for preparing fluorine-containing copolymer fibers. Background technique [0002] As we all know, polytetrafluoroethylene (PTFE) fiber has been widely used in chemical industry, petroleum, textile and It has been widely used in medical, mechanical and other fields. It is also the preferred material for waste incineration, space suits, fire suits, filter materials and aerospace materials. However, only a handful of companies in the world have the ability to process PTFE materials into fibers and monofilaments. This is because PTFE's "insoluble and infusible" characteristics make its processing performance very poor, and it cannot be processed like traditional polymers such as acrylic (polyacrylonitrile) ), polyester (polyester) to prepare fibers by wet or melt spinning. [0003] While retaining the excellent performance of PTFE, the fluorine-containing copolymer has sig...

Claims

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Application Information

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IPC IPC(8): D01F6/28D01F6/32D01D5/08
Inventor 肖长发潘健黄庆林王纯
Owner TIANJIN POLYTECHNIC UNIV
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