The methods for impregnating carbon graphite mainly include the following:
Phenolic resin impregnation: Phenolic resin is water-soluble and alcohol-soluble. Alcohol-soluble resin is generally used. The impregnation steps include placing the graphite tube into the impregnation kettle, vacuuming and sucking the phenolic resin, and then pressurizing and heating to cure.
Furan resin impregnation: Furan resin has good acid and alkali resistance and is suitable for various media environments. The impregnation steps are similar to phenolic resin. The graphite tube is placed in the impregnation kettle, vacuuming and sucking the furan resin, and then pressurizing and heating to cure.
Epoxy resin impregnation: Epoxy resin is resistant to alkaline medium corrosion. The impregnation steps are similar to phenolic resin and furan resin. The graphite tube is placed in the impregnation kettle, vacuuming and sucking the epoxy resin, and then pressurizing and heating to cure.
PTFE impregnation: PTFE impregnant has excellent corrosion resistance and is suitable for various strong acid and alkali environments. The impregnation step includes placing the graphite tube into the impregnation kettle, vacuuming it, sucking in the polytetrafluoroethylene suspension, and then pressurizing and heating it for curing.
Coal tar impregnation: Coal tar is used as an impregnation liquid, mainly for specific applications. The impregnation step includes placing the graphite product in a preheating tank for preheating, then placing it in the impregnation tank for vacuuming, and pressurizing and heating it after sucking in the coal tar.
Application areas of impregnated carbon graphite: Impregnated carbon graphite rings are widely used in various mechanical sealing occasions, such as the sealing systems of pumps, compressors, reactors and other equipment to ensure the stable operation of the equipment and the sealing of the medium. In addition, impregnated carbon graphite is also used to manufacture graphite bearing materials, sealing rings, electrodes, etc., with excellent mechanical properties and sealing properties.
