Production and sales of high temperature resistant insulation casing material [heat shrinkable tube, fiberglass pipe, iron iron fluorine spaghetti sleeving, woven network etc.); High temperature heat insulation material series [mica plate, mica gasket, mica tube, mica tape, mica products 】; High temperature resistant insulation film and adhesive tape series (high temperature polyimide insulation film, tape, teflon tape in electrical and electronic products, power transmission, auto and parts, ship manufacturing, aviation industry, petrochemical industry, machinery manufacturing, medical industry, unmanned aerial vehicles (uavs) and other fields has been widely used.