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HomePTFE Machining: Material Definition and Uses
The rigid polymer chain structure of PTFE makes it extremely difficult to process by traditional methods such as injection and extrusion, 3D printing, etc. The best process to handle this material is CNC machining service.
Shenzhen Tuofa latest machining guide outlines PTFE machining definitions and uses, and provides a comprehensive understanding of PTFE materials that will hopefully help make your custom projects easier.
What is PTFE
Polytetrafluoroethylene (PTFE) is a thermoplastic, abbreviated as PTFE, invented by DuPont in 1936 and registered as Teflon® in 1945. It has the characteristics of various other engineering plastics, PTFE is one of the best corrosion-resistant materials in the world today, and is widely used as a sealing material and filling material, and is also known as the "King of Plastics" in China.
PTFE Material Machining Considerations
Low thermal coefficient
The thermal conductivity of Polytetrafluoroethylene plastic is only 0.2%-0.5% of that of steel, making it susceptible to overheating and scorching during machining.
Tool sharpness
PTFE material has a coefficient of friction of 0.04, which requires the tool to be sharpened very sharply. So it is not recommended to use carbide tools.
Machine speed
CNC milling PTFE material can not add coolant, machine spindle speed control at 15000-25000, can reduce the burr on the surface of the parts.
High specific strength
The tensile strength has reached the level of steel, and the modulus of elasticity is low, which can effectively solve the various losses caused by excessive elastic deformation.
Teflon Materials for Prototyping and Production
Teflon material has the lowest coefficient of friction of any known solid material. What characteristics do you think it meets for the end use of the part?
Tuofa believes that teflon plastic is the most ideal material for oil-free lubrication of mechanical equipment parts. We do not ignore challenging projects in prototyping and manufacturing, and only innovate when we meet the challenge.
PTFE Material Properties
| Properties | Test Standards | UNIT | Value |
| Density | ISO 1183 | g/cm3 | 2.2 |
| Elongation | D638-14a | % | 200-300 |
| Bending strength | ASTM D695 | MPa | 20.7 |
| Compressive strength | ISO527 | PSI | 3,500 |
| Rockwell hardness | ASTM D785 | D55-D75 | |
| Melting point | ASTM D3418 | °C | 327 |
| Water absorption | ISO 294-4 | % | Less than 0.01 |
| Operating temperature | D648-16 | ℃ | -180 to 260 |
| Thermal expansion | ℃ | 151 x 10-6 per | |
| Friction coefficient | 0.1 | ||
| Elasticity Modulus | MPa | 280-400 |
Teflon Uses
Teflon material is a high-performance polymeric fiber that possesses extremely high chemical resistance. It has a very low coefficient of friction and a wide operating temperature range so that it can not only work in environments with large temperature differences, but also has efficiency and service life. These three characteristics make teflon used in the automotive, medical, petrochemical, electronics, and mechanical engineering industries, which include
Non-stick layer
Bearings
Valve seat
Pipe Flanges
Exchangers
Sealing parts)
Containers
Circuit boards
People Also Ask
What kind of plastic is polytetrafluoroethylene?
Polytetrafluoroethylene is a thermoplastic, a fluoropolymer composed of carbon and fluorine atoms. It has the property of softening by repeated heating and hardening by cooling within a certain temperature range. |
