High purity graphite paper, also known as flexible graphite paper, is made of natural graphite flakes, which are chemically treated, heated and expanded at high temperature, and then rolled to form flexible graphite coil. Expanded graphite coil does not contain binder and filler, so it has high purity, good corrosion resistance, radioactivity resistance, high and low temperature resistance, outstanding compression resilience, self-lubrication and impermeability for low pressure sealing. Graphite sheets and sheet metal can be combined to form various forms of graphite composite panels.
Introduction to the properties of high purity graphite paper:
1. has excellent heat resistance and cold resistance. Flexible graphite has little change in physical properties from - 270 to 3650 degrees (in non-oxidizing gases), and can be used in air to about 450 degrees.
2. has excellent chemical resistance. High-purity flexible graphite has corrosion resistance to all inorganic and organic media except in aqua regia, concentrated nitric acid, concentrated sulfuric acid and high temperature dichromate, potassium permanganate and ferric chloride.
3. excellent self lubrication. Flexible graphite is the same as natural graphite. Under the action of external force, the sliding between layers occurs easily, so it has lubricity, good antiwear property and low friction coefficient.
4. high resilience. When the axle or sleeve has radial circular runout due to migration in fabrication and installation, it has satisfactory floating performance. Even if graphite shows cracks, it can be very close, so as to ensure tightness and avoid leakage.
5. Expanded graphite gasket has low requirement on flange surface. Small pretightening force can achieve sealing effect. Simple cutting is a more economical and practical gasket.
The main products are:
It can be used as graphite packing ring material.
It can be combined with metal sheet to form graphite composite plate and cut into various shapes of gaskets.
It is directly used for making various low pressure gaskets or processed into thick plates.