Glass fiber (original name: glass fiber) is an inorganic non-metallic material with excellent performance. It has many advantages, such as good insulation, heat resistance, good corrosion resistance and high mechanical strength, but the disadvantage is fragility. Poor wear resistance. It is made of seven kinds of ore of pyrophyllite, quartz sand, limestone, dolomite, borosilicate and borax as raw materials by high-temperature melting, drawing, winding and weaving. The diameter of the monofilament is several. Micron to twenty micrometers, equivalent to 1/20-1/5 of a hair strand, each bundle of fiber strands consists of hundreds or even thousands of monofilaments. Glass fiber is commonly used as a reinforcing material in composite materials, electrical insulating materials and thermal insulation materials, circuit boards and other fields of the national economy.
On October 27, 2017, the World Health Organization's International Agency for Research on Cancer published a preliminary list of carcinogens, special-purpose fibers such as E-glass and '475' fiberglass in the list of Class 2B carcinogens, continuous fiberglass List of 3 types of carcinogens.