Classification of fiberglass

According to different product forms and production processes, the company's glass fiber products can be divided into four categories: roving, spun yarn, roving products, and spun yarn products. Rovings include direct yarns, plied yarns and chopped yarns; spun yarns can be divided into first-twisted spun yarns, double-twisted spun yarns, bulked spun yarns and direct spun yarns in terms of yarn form; roving products include multi-axial fabrics, checkered cloths and felts; Spun yarn products include electronic cloth and industrial cloth. According to the different matching matrix resin materials, it can be divided into two categories: thermosetting glass fiber and thermoplastic glass fiber. · The matrix resins matched with glass fibers for thermosetting resins are mainly phenolic resins, urea-formaldehyde resins, epoxy resins, unsaturated resins, polyurethane, etc. Thermosetting resin is a linear or branched polymer before solidification. After heating and solidification, chemical bonds are formed between the molecular chains to form a three-dimensional network structure. It can be formed once and cannot be heated and melted again. Mainly used in areas where heat insulation, wear resistance, insulation, and high voltage resistance are required, such as wind turbine blades and circuit boards. · The matrix resins matched with glass fibers for thermoplastic resins are mainly polyolefin, polyamide, polyester, polycarbonate, polyformaldehyde, etc. Thermoplastic resin is a high molecular weight solid at room temperature. It is a linear or slightly branched polymer. There is no cross-linking between molecules and they only attract each other through van der Waals force or hydrogen bonding. During the molding process, the thermoplastic resin softens and flows after being heated under pressure without chemical cross-linking. It can be shaped in the mold and cooled to form products of the desired shape. It is mainly used in fields where toughness, corrosion resistance, fatigue resistance and other effects are required, such as automobile manufacturing, household appliances, electronic appliances, and building materials. After the thermoplastic glass fiber composite material is processed, solidified and cooled, it can still achieve fluidity when heated again and has good recyclability.