Method for fabricating Teflon line with high content of graphite

A technology of polytetrafluoroethylene and processing method, which is applied in the sealing, yarn, application and other directions of the engine, can solve the problems of sealing failure, etc., achieve the effects of improved thermal conductivity, small friction coefficient, and reduced probability of disconnection

Inactive Publication Date: 2006-04-19
杨久新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The PTFE thread that has been widely used at present is made of raw material belt with oil and no oil, and there is also a PTFE thread with a small amount of graphite powder added. Due to the high-speed continuous operation of the sealed working environment during use, if Can not lubricate and dissipate heat well, will generate high temperature, and easily cause seal failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0011] Polytetrafluoroethylene dispersion resin (206 first-class product), 2500 mesh graphite powder with 99% carbon content, K-30 high temperature resistant silicone oil in the ratio of 10: 2.0: 3.0 by weight, add a gentle stirrer at room temperature Mixing and stirring for 1 hour, the mixture is molded into the required ∮50×60 cylindrical billet through a hydraulic press, and the density is controlled at 0.8g / cm 3 Put the cylindrical billet in a closed container, put it in a constant temperature drying box with a temperature of about 60°C, heat it for 8 hours, and then extrude the matured cylindrical billet into the required bar through the extrusion die ∮3.5mm, and then roll the bar into a thin strip with a thickness of 0.3mm, and then heat and stretch the thin PTFE tape through a heating stretching device. The temperature of the heating process is controlled at about 155°C, The ratio is controlled at about 20 times, and the obtained PTFE tape can be twisted, shaped, polish...

Embodiment 3

[0014] Put polytetrafluoroethylene dispersion resin (216 high-grade product), 3000 mesh graphite powder with 99.9% carbon content, K-30 high temperature resistant silicone oil in the ratio of 10:2.3:2.5 by weight, and add it to a gentle stirrer at room temperature Carry out mixing and stirring for 1 hour, and the mixture is molded into the required ∮50×60 cylindrical billet through a hydraulic press, and the density is controlled at 0.8g / cm 3 Put the cylindrical billet in a closed container, put it in a constant temperature drying box at a temperature of about 60°C, heat it for 8 hours, and then extrude the matured cylindrical billet into the required bar through the extrusion die ∮3.5mm, and then roll the bar into a thin strip with a thickness of 0.3mm, and then heat and stretch the thin strip of PTFE tape through a heating and stretching device. The ratio is controlled at about 23 times, and the obtained PTFE tape can be twisted, shaped, polished, and loaded.

[0015] ...

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Abstract

The present invention relates to a production method of polytetrafluoroethylene thread with high graphite content. It is made up by using polytetrafluoroethylene dispersible resin and adding superfine graphite micropowder and high-temperature-resistant lubricating oil through the processes of mixing materials, heating-curing, hot-extruding and thermal drafting. It can be extensively used for filling seal of various chemical equipments.

Description

technical field [0001] The invention relates to a processing method of polytetrafluoroethylene wire, in particular to a processing method of high graphite content polytetrafluoroethylene wire. Background technique [0002] The PTFE thread that has been widely used at present is made of raw material belt with oil and no oil, and there is also a PTFE thread with a small amount of graphite powder added. Due to the high-speed continuous operation of the sealed working environment during use, if Without good lubrication and heat dissipation, high temperature will be generated, which will easily cause seal failure. Contents of the invention [0003] The purpose of the present invention is to provide a processing method for polytetrafluoroethylene wire with high graphite content, which can improve the lubrication and thermal conductivity of polytetrafluoroethylene wire by increasing the graphite content, so that it can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02G3/06D02G3/44B29C70/88B29D7/00F16J15/22
Inventor 杨久新
Owner 杨久新
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