1. Different production raw materials and processes. Glass wool insulation materials use quartz sand, feldspar, sodium silicate, boric acid, etc. as the main raw materials. After high-temperature melting, the fiber-cotton shape of less than 2um is obtained, and then a thermosetting resin adhesive is added and pressed and shaped at high temperature to produce boards, felts, and pipe products of various shapes and specifications. Aluminum foil or PVC film can also be pasted on its surface.