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Method of preparing PTFE micropowder through electron beam combined with ozone and carbon tetrachloride

A carbon tetrachloride and electron beam technology, applied in the chemical industry, can solve the problems of high production cost and increased production cost, and achieve the effects of stable product performance, easy control, and simple preparation process

Inactive Publication Date: 2013-07-31
HUAYA AUTOMOBILE FITTINGS FOSHAN CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the production cost of irradiation with electron beam and Co-60 gamma ray radiation equipment is very high, and the need for high standards of safety protection further increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of method that electron beam combines ozone and carbon tetrachloride to prepare PTFE superfine powder, comprises the steps:

[0044] 1) Pack the dried PTFE raw material in a low-temperature resistant container, put it in liquid nitrogen, and take it out after quenching;

[0045] 2) Grinding the polytetrafluoroethylene raw material after the quenching treatment with a pulverizer, and the particle size after pulverization is 100-1000 μm;

[0046] 3) Put the pulverized polytetrafluoroethylene raw material into the sealed cavity on the circulating trolley of the electron accelerator;

[0047] 4) Seal the electron accelerator, and open the air intake mechanism, and pass ozone on the surface of the polytetrafluoroethylene on the circulating trolley, and the weight ratio of the introduced ozone to the polytetrafluoroethylene raw material in the tray is 0.3%;

[0048] 5) Turn on the electron accelerator, which generates high-energy electron beams to irradiate the PTFE ...

Embodiment 2

[0052] A kind of method that electron beam combines ozone and carbon tetrachloride to prepare PTFE superfine powder, comprises the steps:

[0053] 1) Pack the dry polytetrafluoroethylene raw material in a low-temperature-resistant container, place it in liquid nitrogen, and take it out after quenching;

[0054] 2) Grinding the PTFE raw material after quenching treatment with a pulverizer, the particle size after pulverization is 100-1000 μm;

[0055] 3) Place the pulverized polytetrafluoroethylene raw material in the sealed cavity on the circulating trolley of the electron accelerator;

[0056] 4) Turn on the spraying device, and the spraying device sprays carbon tetrachloride on the polytetrafluoroethylene raw material on the circulating trolley, and the sprayed carbon tetrachloride and the polytetrafluoroethylene on the circulating trolley The weight ratio of ethylene raw material is 5%;

[0057] 5) Turn on the electron accelerator, which generates high-energy electron bea...

Embodiment 3

[0061] A kind of method that electron beam combines ozone and carbon tetrachloride to prepare PTFE superfine powder, comprises the steps:

[0062] 1) Pack the dried PTFE raw material in a low-temperature resistant container, put it in liquid nitrogen, and take it out after quenching;

[0063] 2) Grinding the polytetrafluoroethylene raw material after the quenching treatment with a pulverizer, and the particle size after pulverization is 100-1000 μm;

[0064] 3) Put the pulverized polytetrafluoroethylene raw material into the sealed cavity on the circulating trolley of the electron accelerator;

[0065] 4) Seal the electron accelerator, and open the air intake mechanism, and pass ozone on the surface of the polytetrafluoroethylene on the circulating trolley, and the weight ratio of the introduced ozone to the polytetrafluoroethylene raw material in the tray is 0.3%;

[0066] 5) Turn on the spraying device, and the spraying device sprays carbon tetrachloride on the polytetrafl...

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Abstract

A method of preparing PTFE micropowder through electron beam combined with ozone and carbon tetrachloride comprises packaging dried polytetrafluoroethylene (PTFE) raw materials with low-temperature-resistant container, rapidly cooling in liquid nitrogen, pulverizing the rapidly cooled PTFE raw materials with a pulverizer, putting the pulverized PTFE raw materials into a cyclic trolley of an electron accelerator, sealing the electron accelerator, opening an air inlet mechanism, introducing the ozone onto surface of the PTFE, opening a spraying apparatus which can spray the carbon tetrachloride to the PTFE raw materials on the cyclic trolley, opening the electron accelerator which generates high-energy electron beams to irradiate the PTFE raw materials, putting the irradiated PTFE into an air-flow crushing system, fully crushing and grading to obtain the PTFE micropowder. According to the invention, the preparation method is simple, and can reduce irradiation time and the irradiation dose, thereby reducing cost.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing PTEE superfine powder by electron beam irradiation combined with ozone and carbon tetrachloride. Background technique [0002] Polytetrafluoroethylene (PTFE) ultrafine powder is a low molecular weight fine powder, also known as "PTFE wax". The average particle size of PTFE ultrafine powder is less than 5μm, and the specific surface area is greater than 10m 2 / g, the friction coefficient is about 0.06-0.07, it has good lubricity and can be well dispersed in many materials. [0003] The purity of PTFE products is 100%, the molecular weight is less than 10,000, and the PTFE micropowder series with a particle size of 0.5 μm not only maintains the original excellent properties of PTFE, but also has many unique properties, such as no self-coagulation, no Electrostatic effect, good compatibility, low molecular weight, good dispersibility. High self-lub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08L27/18B02C21/00B02C19/06
Inventor 顾建忠吴明红蔡建球
Owner HUAYA AUTOMOBILE FITTINGS FOSHAN CITY
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