Method for preparing expanded polytetrafluoroethylene fiber for exhaust decomposition

A technology of polytetrafluoroethylene and expanded body, which is applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of low production efficiency, achieve the effects of avoiding pollution, shortening the process flow, and reducing production costs

Inactive Publication Date: 2007-06-13
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is completed on special cutting equipment, which requires extremely high precision and low production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] a. Sieve expanded polytetrafluoroethylene resin and catalyst powder

[0040] With 1 kg of expanded polytetrafluoroethylene resin (F-106, purchased from Japan Daikin Company), 0.5 kg of catalyst powder (O4-85, purchased from BASF Company, powder particle diameter 30 nanometers), sieved with 10 mesh Sieve, sieve no less than 3 times, prepare the sifted powder mixture;

[0041] b. Blending and screening

[0042] Add 0.15 kg of kerosene to the above-mentioned sieved powder mixture (the weight of the sieved powder mixture is 1.5 kg, kerosene is 15% relative to the weight of expanded polytetrafluoroethylene resin), and place it in a container with an airtight plug. Mix in a dry jar. To facilitate mixing, 1 / 3 to 2 / 3 of the bottle capacity is kept free. After mixing, the bottle is hermetically closed to prevent evaporation of the lubricant;

[0043] c. ripening

[0044] After mixing, gently shake the sealed bottle for about 30 minutes to disperse the lubricant, and let it ...

Embodiment 2

[0051] a. Sieve expanded polytetrafluoroethylene resin and catalyst powder

[0052] Expanded polytetrafluoroethylene resin F104 (purchased from Japan Daikin Company) 0.5 kilogram, expanded polytetrafluoroethylene resin F106 (purchased from Japan Daikin Company) 0.5 kilogram, catalyst powder (O4-86, purchased from BASF company, 1 kg of powder with a particle size of 1 micron), sieved with a 10-mesh sieve, and sieved no less than 3 times to prepare a sifted powder mixture;

[0053] b. Blending and screening

[0054] Add 0.25 kg of petroleum ether into the above-mentioned sieved powder mixture (the total weight of the sieved powder mixture is 2 kg, and petroleum ether is 25% relative to the weight of expanded polytetrafluoroethylene resin), and place it with an airtight plug Mix in a dry jar of sufficient volume. To facilitate mixing, 1 / 3-2 / 3 of the bottle capacity is left free. After mixing, the bottle is hermetically closed to prevent evaporation of the lubricant;

[0055] ...

Embodiment 3

[0063] a. Sieve expanded polytetrafluoroethylene resin and catalyst powder

[0064] With 1.2 kilograms of expanded polytetrafluoroethylene resin (CD123, purchased from Japan Asahi Glass Co., Ltd.), 1.2 kilograms of catalyst powder (titanium / vanadium catalyst produced by CRI company, powder particle diameter 4.2 microns), adopt 10 mesh sieves to sieve, pass Sieve for no less than 3 times to prepare the sifted powder mixture;

[0065] b. Blending and screening

[0066] 0.175 kilograms of lubricant isopar-E (purchased from Esso Chemical CO) and 0.175 kilograms of naphtha are added to the above-mentioned sifted powder mixture (2.2 kilograms of the total weight of the sifted powder mixture, isopar-E is 35% by weight of vinyl fluoride resin) in a dry jar of sufficient capacity with an airtight stopper for mixing. To facilitate mixing, 1 / 3-2 / 3 of the bottle capacity is left free. After mixing, the bottle is hermetically closed to prevent evaporation of the lubricant;

[0067] c. ...

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Abstract

The invention discloses varicosity polytetrafluoroethylene fiber manufacturing method used in waste gas decomposition. It includes the following steps: mixing varicosity polytetrafluoroethylene resin, waste gas catalyst powder, with lubricant; sieving; ageing; compacting; spinning; degreasing; drawing; and hot forming. The produced fiber has multi-microcellular structure which can decompose the waste gas while passing, good quality, can be widely used in filtering material. Compared with the existing technique, the invention has the advantages of simple technology, low cost, no pollution etc.

Description

technical field [0001] The invention relates to a preparation method of polytetrafluoroethylene fibers, in particular to a method for preparing expanded polytetrafluoroethylene fibers for exhaust gas decomposition by using a lubricant extrusion spinning method. Background technique [0002] Polytetrafluoroethylene fiber, commonly known as "Fluorolon" or "Teflon" in my country, has excellent heat resistance, chemical corrosion resistance and high strength, and is widely used in many industrial fields. PTFE fibers alone or mixed with glass fibers can be processed into high-temperature resistant filter felts for dust removal that are often used in power plants, metallurgical plants, and cement plants. Among them, the filter mat made of polytetrafluoroethylene fiber mixed with glass fiber can provide a more efficient filtering surface than pure fluorine fiber felt of the same weight; Between the fibers, it can greatly improve the separation efficiency of dust particles in the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/12D01F1/10D01D5/00
Inventor 郭玉海陈建勇张华鹏冯新星
Owner ZHEJIANG SCI-TECH UNIV
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