The warranty period is a basic attribute that any product should have. The warranty period is the time for quality assurance. It is a kind of quality assurance for the product within a specified period of time. The same is true for PTFE products. Although we all know that PTFE products have a long service life, how long is the service life? Many people may not know much about it. So, let's take PTFE board as an example to share with you Introduce the service life of PTFE products.
The service life of the PTFE sheet is very long, because the PTFE sheet is a plate-shaped PTFE product processed by a special process (or die cutting or turning) from the PTFE material, and the PTFE material itself It is a material with many excellent performance properties, including high temperature resistance, which can be used at a temperature of 200~260 degrees for a long time; low temperature resistance, even at -100 degrees, the PTFE material is still soft; corrosion resistance, can withstand aqua regia And all organic solvents; weather resistance, long-term exposure to the atmosphere, the surface and performance are unchanged, its radiation resistance and low permeability are also better; high lubrication, with a small coefficient of friction in plastics, The coefficient of friction is only 0.04; it has a small surface tension in solid materials and does not adhere to any substances; it is physiologically inert and non-toxic; excellent electrical properties, it is an ideal Class C insulating material, and a thick layer of newspaper can block The high voltage of 1500V;... Therefore, the quality of the PTFE sheet made of PTFE material is very stable under normal circumstances, which is the most stable quality of the PTFE sheet listed in most books or on the Internet. We do not deny the characteristics, but we still have to explain the other characteristics of the PTFE sheet that need to be explained.
Any product will expand and contract with heat, while the PTFE sheet is more prone to thermal expansion and contraction, and the expansion coefficient of the PTFE sheet is about ten times that of steel. Therefore, when the PTFE sheet is subjected to temperature changes, it will It has a relatively large impact on the size of the PTFE sheet, such as spring, summer, autumn and winter. In many parts of our country, the temperature difference between the four seasons is relatively large. In the temperature changes of spring, summer, autumn and winter, the board is also getting bigger or smaller, and this situation exists. It is worth noting that although the PTFE sheet will be slightly deformed by the influence of heat and cold, its intrinsic quality will not change. will change.
The new PTFE sheet standard QB/T5257-2018 clearly stipulates that the warranty period of PTFE sheets is ten years. This is the first time that the warranty period of PTFE products has been included in the scope of national industry standards.
Post time: Oct-13-2022