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膨胀石墨又称柔性石墨,系继聚四氟乙烯密封材料之后,并可与之相匹敌的又一重要密封材料。这种膨胀石墨不但保持着天然石墨所具备的一切优良性质(例如耐热性及耐药性等),而且还具备以往石墨所没有的优良性能(例如质量轻、柔软及富于弹性等)。自美国联合碳化公司发明一种完全不含胶粘剂及添加剂的膨胀石墨片以来,近年由于原子能、火力发电及石油等成套设备对漏泄的要求十分苛刻,它作为填密材料或垫圈材料的使用量越来越广。
Expanded graphite, also known as flexible graphite, after the Teflon sealing material, and can rival another important sealing material. The expanded graphite not only retains all excellent properties (such as heat resistance and chemical resistance) of natural graphite, but also has the excellent properties (such as light weight, softness and elasticity, etc.) that graphite did not have in the past. Since American Union Carbide invented an expanded graphite sheet completely free of adhesives and additives, the requirements for leakages due to complete sets of equipment such as nuclear power, thermal power generation and petroleum have been very harsh in recent years. The more it is used as packing material or gasket material The more widely.