已经过去的 2 0世纪 ,是石棉在密封材料领域从崭露头角到淘汰出局的世纪。起初 ,人们觉得石棉密封件具有优异的耐温、耐腐蚀等性能 ,因而得到广泛应用。后来发现石棉粉尘能从呼吸道和毛细孔进入人体 ,危害人体健康。为此 ,人们努力寻求密封材料的“非石棉化”。在众多非石棉密 The 20th century has passed, is the asbestos in the field of sealing materials from budding to eliminate the century. At first, people think that asbestos seals have excellent heat resistance, corrosion resistance and other properties, which are widely used. Later found asbestos dust can enter the human body from the respiratory tract and pores, endangering human health. To this end, people are trying hard to find “non-asbestos” of the sealing material. In many non-asbestos dense