Asbestos, also known as “asbestos”, is a commercial term that refers to silicate mineral products with high tensile strength, high flexibility, resistance to chemical and thermal erosion, electrical insulation, and spinnability. It is the general term for natural fibrous silicate minerals. There are 6 types of minerals (serpentine asbestos, amphibole asbestos, actinolite asbestos, anthophyllite asbestos, amosite, tremolite asbestos, etc.) Asbestos is composed of fiber bundles, and the fiber bundles are composed of very long and thin fibers that can be separated from each other. Asbestos has a high degree of fire resistance, electrical insulation and heat insulation, and is an important fireproof, insulation and heat preservation material. However, because asbestos fibers can cause asbestos lung, pleural mesothelioma and other diseases, many countries have chosen to completely ban the use of this dangerous substance.
Asbestos has been used for weaving for a long time. Asbestos has high fire resistance, electrical insulation and thermal insulation, and is an important fireproof, insulation and heat preservation material. There are nearly 3000 kinds of asbestos products or products containing asbestos. Mainly used in mechanical transmission, braking, heat preservation, fire protection, heat insulation, anti-corrosion, sound insulation, insulation, etc. The more important ones are the manufacturing sectors such as automobiles, chemicals, electrical equipment, and construction.
The use of asbestos by humans has been proven to go back to ancient Egypt, when asbestos was used to make the pharaoh’s shroud. In Finland, asbestos fibers were also found in pottery workshops in the Paleolithic age. The Greek historian Herodotus (5th century BC) talked about the refractory containers used to hold the skeletons of burned corpses. It is said that Emperor Charlemagne (742-814) owned a white tablecloth made of asbestos, and he threw the tablecloth into the fire after a dinner for the guests to surprise the guests.
In the Zhou Dynasty of China, asbestos fibers can be used to make fabrics. Because they are as white as new after being stained and burned, they are called fire cloth or flame cloth. There is a record in Liezi’s book: “The cloth of the fire squash must be thrown into the fire, and the cloth is the color of the fire. The color of the dirt is the color. The fire and the vibrating, Hao Ran doubts the snow. Marco Polo once said that a “mineral substance” was used by the Tatars to make fireproof clothing.
Post time: May-06-2021