Asbestos is recognized as a hazardous substance in the international medical field. Once inhaled, it will stay in the lung tissues, causing various degrees of harm to the body. Long-term exposure to asbestos may cause the lung cancer, pleural and peritoneal mesothelial cancer and various malignant tumors. In recent years, countries have successively strengthened the supervision of the use of asbestos; the asbestos containing products are also subject to stringent standards.

Asbestos is a slender natural silicate mineral fiber that can be split. It is elastic, insulating, high heat resistant, heat-insulating, chemical resistant (acid and alkali resistant) and has good mechanical strength. Its fiber length can range from one hundred to hundreds of nanometers. It is an excellent fiber-reinforced composite. The main types of asbestos are shown in the table:

Application of asbestos

Due to the unique chemical and physical properties, asbestos fibers are used in the materials widely existing in people's daily life, such as the building materials, insulation materials, sealing materials, friction materials, etc. The health effects of asbestos fiber on the human body have been studied in depth -- if the asbestos fiber enters the human body, it may cause disease. With the increasing awareness of environmental protection, there is a growing concern over the hazards of asbestos, and more and more attention is paid to the safe use of asbestos materials and the disposal of the asbestos-containing wastes.