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Details of the characteristics of Teflon

  In our daily life, our Teflon is common, but the use of it in the process, how many people know its characteristics of what is it? Property
  1, not sticky: Almost all the material is not bonded with Teflon coating, Thin film also showed good adhesion properties.
  2, heat resistance: Teflon coating has excellent heat resistance and low temperature properties. Short period of time can be high temperature to 300 ℃, generally between 240 ℃ -260 ℃ can be used continuously, with significant thermal stability, it can work without embrittlement in freezing temperatures, it does not melt at high temperatures.
  3, sliding: Teflon coating has a low coefficient of friction. Load sliding friction coefficient changes, but only in the values ​​between 0.05-0.15.
  4, anti-wet: Teflon coating surface water and oil production operations are not easy to dip solution, such as sticking a small amount of dirt, simply wipe clean.Downtime is short, save time and improve efficiency.
  5, wear resistance: under high load, with excellent wear resistance. In a certain load, wear-resistant and non-adherence with the dual advantages.
  6, corrosion resistance: Teflon is almost free from erosion of the drug, in addition to withstand molten alkali metal fluoride, a strong acid medium, and above all than 300 ℃ sodium hydroxide (including aqua regia), strong oxidizing agents, reducing agent and various organic solvents, can protect parts from being any kind of chemical corrosion.
  Physical properties
  Relative density: 2.14-2.2
  Water absorption (23 ℃, 24h): less than 0.01%
  Tensile strength MPa: 22-35
  Elongation%: 200-400
  The tensile modulus MPa: 400
  Flexural modulus MPa: 420
  Compressive elastic modulus MPa: 500
  Notched impact strength J / m: 163
  Heat distortion temperature ℃: 0.45MPa, 121,1.82MPa, 55
  Linear expansion coefficient of 10-5 / ℃: 10
  Flame retardancy (UL94): V-0
  Volume resistivity Ω / cm: 1017-1018
  Dielectric constant: <2.1
  Dielectric loss tangent: <2 × 10-4
  Dielectric strength KV / mm:> 17
  Arc resistance:> 300
  Chemical Properties
  Insulation resistance: unaffected by the environment and frequency, volume resistivity of up to 1018 ohms / cm, dielectric loss, high breakdown voltage.
  High and low temperature: The temperature influence changes little, wide temperature range range, temperature -190-260 ℃.
  Self-lubricating: With the smallest plastic friction coefficient, is the ideal oil-free materials.
  The surface is not sticky: known solid materials can not adhere to the surface, is a minimal surface energy of the solid material.
  Resistance to atmospheric aging resistance, radiation resistance and low permeability: Long-term exposure to the atmosphere, surface and performance remained unchanged.
  Non-flammable: limiting oxygen index of 90 or less.
  PTFE is widely used in high temperature, high viscosity requirements of industry. The strongest super acid - fluoroantimonic acid can also be used to do it to save.
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