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Glass fiber is a kind of inorganic nonmetallic material with excellent performance, and there are many kinds. Its advantages are good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, while its disadvantages are brittleness and poor wear resistance. It is made of pyrophyllite, quartz sand, limestone, dolomite, xonotlite and magnesite through high temperature melting, drawing, winding and weaving. Its monofilament diameter ranges from a few microns to more than twenty microns, which is equivalent to 1/20- 1/5 of a hair filament, and each bundle of fiber precursors consists of hundreds. Glass fiber is usually used as reinforcement, electrical insulation and thermal insulation in the fields of national economy such as composite materials and circuit boards.
20 17 10 27. The list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was preliminarily sorted out for reference. Special-purpose fibers, such as E glass and "475" glass fiber, belong to Class 2B carcinogens, and continuous glass fiber belongs to Class III carcinogens.