Flexible graphite material belongs to non fiber material. Graphite powder flexible graphite made of plate after molded into sealed filler use. Flexible graphite, also known as expanded graphite, is to remove impurities from natural flake graphite.
After the strong oxidation mixed acid treatment, it becomes the oxidized graphite. The oxidized graphite decomposes the carbon dioxide, the volume expands rapidly, becomes the loose, soft and toughness flexible graphite. The main features are:
First, excellent heat resistance and cold resistance. Flexible graphite from 270 degrees of ultra-low temperature to 3650 degrees (in the oxidation of gas), the physical properties of almost no change in the air can also be used to about 600 degrees; Graphite Powder
Second, excellent chemical resistance. In addition to corrosion in strong oxidizing medium such as nitric acid and concentrated sulfuric acid, flexible graphite has little corrosion in other acids, alkalis and solvents.
Third, there is good self-lubricating. As with natural graphite, the graphite powder layer is easy to produce sliding under external force, so it has lubricating property, good antifriction property and small friction coefficient.
Third, rebound rate is high. When the shaft or bushing due to manufacturing, installation, such as the existence of eccentric radial circular runout, with sufficient floating performance, even if the graphite cracks, can also be very good close, so as to ensure that the paste tight, to prevent leakage.
