(1) The color of the PTFE Expanded Sheet is the original color of the resin. (2) It should be uniform in texture and smooth in appearance, and no defects such as cracks, bubbles, delamination, mechanical damage, knife marks, etc. are allowed. (3) The PTFE Expanded Sheet is allowed to have a slight cloudy elastic phenomenon. (4) No more than one non-metallic impurity with a diameter of 0.1-0.5mm and no more than one non-metallic impurity with a diameter of 0.5-2mm are allowed on an area of ​​10×10 cm. (5) The density is 2.1-2.3T/m3.

　　Advantages of PTFE Expanded Sheet

　　High temperature resistance - working temperature up to 250 ℃.

　　PTFE Expanded Sheet is resistant to low temperature - has good mechanical toughness; even if the temperature drops to -196℃, it can maintain 5% elongation.

　　Corrosion resistance - inert to most chemicals and solvents, strong acid and alkali resistance, water and various organic solvents.

　　PTFE Expansion Panels are weather resistant - have the aging life in plastics.

　　High Lubrication - The lowest coefficient of friction among solid materials.

　　PTFE Expansion Sheet Non-Adherent - The smallest surface tension in a solid material, nothing sticks to it.

　　Non-toxic - It is physiologically inert, and it has no adverse reactions when it is implanted in the body as an artificial blood vessel and an organ for a long time.

　　PTFE Expanded Sheet electrical insulation - can withstand 1500 volts of high voltage.

　　The relative molecular mass of polytetrafluoroethylene is relatively large, the low is hundreds of thousands, and the high is more than 10 million.