Fiberglass helmet use and classification of material to prevent damage to the person's head impact protective equipment. By a certain intensity of the cap shell and cap liner chin belt, rear hoop like. In the cap liner and cap shell and leave some space at the convergence constitute space buffer layer structure to withstand falling objects and dispersion of instant impact force, the cap shell to withstand the force points scattered around delivery. Power absorbed by the buffer layer up to 2/3. The remaining force but also by the entire area of ??conduction cap lining the human head, the focus became the focus plane, the force will be buffered. Fiberglass helmet type, variety, style a lot. (1) fiberglass helmet, suitable for high impact strength of oil drilling, deforestation, power lines, high-rise construction sites and outdoor cold, high temperature types of workplace use. (2) polycarbonate plastic fiberglass helmet, for oil drilling, deforestation, power lines, tall buildings and other types of operations use. ABS plastic fiberglass helmet, suitable for mining, industrial machinery and other high impact strength at room temperature of the interior work, can not touch the fire, not long-term use at low outdoor workplaces. (3) ultra-high molecular weight polyethylene plastic glass, steel helmets, a wider scope, metallurgy, petroleum, chemical, mining, construction, machinery, electric power, transportation, forestry, geology and other job types can be used. (4) Polypropylene plastic fiberglass helmet, suitable for construction, metallurgy, forestry, electricity, mining, Inoue, transportation and other types of farm operations use. (5) tape miners hat, suitable for mining, underground tunnels, culverts and other types of workplaces with use. (6) cold glass, steel helmets, a special protection against the cold glass, steel helmets, mainly for cold areas open operation. Another is equipped with cold glass, steel helmets, generally used Inoue operations. Paper, plastic glass, steel helmets, high temperature 140 ℃, low temperature -40 ℃, divided 1,2,3,4 type. Each with its scope of application. (7) wicker fiberglass helmets, ventilation, good resistance to temperature, light and durable, suitable for construction, deforestation, quarrying, transportation and other outdoor jobs. Electronic alarm fiberglass helmet is to protect the safety and indicates risk of electric shock head combination of new fiberglass helmets. http://www.botongdianli.net/