石棉刹车片对人体健康和环境的危害（The harm of asbestos brake pads to human health and environment）.docVIP

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石棉刹车片对人体健康和环境的危害（The harm of asbestos brake pads to human health and environment）.doc

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石棉刹车片对人体健康和环境的危害（The harm of asbestos brake pads to human health and environment）

石棉刹车片对人体健康和环境的危害（The harm of asbestos brake pads to human health and environment） The harm of asbestos brake pads to human health and environment Asbestos is a silicate mineral fiber, natural mineral fiber is unique, it has good tensile strength and good heat resistance and corrosion resistance, not easy to burn, so it is widely used in automobile clutch brake manufacture, fireproof clothing, building materials and so on. Many types of asbestos, asbestos in the most abundant and most widely used, asbestos itself is not toxic, its the greatest harm from the fiber, which is a very small, almost invisible to the naked eye fiber, when these tiny fibers are inhaled, will be attached and deposited in the lungs that causes lung disease, such as asbestosis, pleural and peritoneal mesothelioma. These lung diseases tend to have a long incubation period (lung cancer usually 15 - 20 years, mesothelioma 20 - 40 years), causing lung cancer in severe cases. Asbestos has been recognized as a carcinogen by the International Centre for cancer research. Study on the national occupation safety and health Vinicius Antao the display, due to inhalation of asbestos caused by the mortality rate will continue, this is because of asbestos and has a time delay process between pulmonary symptoms, which is why the use of asbestos less today, asbestos fiber calm caused mortality did not decline the reason. Research shows that inhaled asbestos fibers can cause irreversible pulmonary fibrosis patients, make patients gradually lose the function of alveolar resulting in respiratory failure; in addition, because of the effects of asbestos fiber fines long-term stimulation, may also induce lung cancer and other respiratory malignant tumor. Such patients often end up with respiratory difficulties or asbestos related cancers. The researchers found a delayed 45 year delay in the use and aspiration of asbestos and deaths, meaning that the death of asbestos in 2005 can be traced back to 1960. According to t