Polytetrafluoroethylene (PTFE/4F) is one of the best corrosion-resistant materials in the world today, so it has the reputation of “the king of plastics”. It can be used in any kind of chemical medium for a long time, and its production solves many problems in my country’s chemical, petroleum, pharmaceutical and other fields. PTFE seals, gaskets, gaskets.
Compared with other plastics, PTFE has the characteristics of excellent chemical corrosion resistance and temperature resistance, and it has been widely used as sealing material and filling material. It has high chemical stability and excellent chemical corrosion resistance, such as strong acid, strong alkali, strong oxidant, etc. It has outstanding heat resistance, cold resistance and abrasion resistance. The long-term use temperature range is -180-260 ° C, and excellent The electrical insulation is not affected by temperature and frequency. In addition, it has the characteristics of no sticking, no water absorption, and no burning.
O-ring (O-rings) is a kind of sealing ring with a circular cross-section. Because its cross-section is O-shaped, it is called an O-ring, also called an O-ring.
O-rings are the most common mechanical design for seals because of their simplicity of manufacture, reliable function, and simple installation requirements. O-rings are subjected to pressures of tens of megapascals (kilo pounds). O-rings can be used in static applications as well as in dynamic applications where there is relative movement between components, such as shafts of rotary pumps and pistons of hydraulic cylinders.
O-ring ptfe powder 1.6 micron
The most common sealing ring for electric pressure cookers on the market today is the O-ring.
O-rings are mostly transparent white and also brown. Application: heat resistance (250°), cold resistance (-60°), good weathering resistance, good resistance to phosphate ester-based non-flammable hydraulic oil, water, high pressure steam, chemicals, etc., not suitable for general mineral oil, Lubricants and hydraulic oils. Used in heat-resistant, steam-resistant gaskets, gas seals and electrical insulation seals.
The advantages of O-rings are first of all that the structure is simple, and the integral groove design reduces the cost of parts and design. The second is the compact design of the O-ring, which reduces the size of the parts. Furthermore, the O-rings are easy to install, reducing the risk of errors. Finally, the O-ring is suitable for many occasions.
Advantages of PTFE O-rings
High and low temperature resistance
Has good mechanical toughness; maintains 5% elongation even when the temperature drops to -196°C. High temperature working temperature up to 250 ℃.
For most chemicals and solvents, it is inert, resistant to strong acids and alkalis, water and various organic solvents.
Has the best aging life of any plastic.
It is the lowest coefficient of friction among solid materials.
Does not stick
It is the smallest surface tension in a solid material and does not adhere to anything.
It is physiologically inert and has no adverse reactions when implanted as artificial blood vessels and organs for a long time.
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