The working conditions of automobile fenders are extremely harsh, and the materials are required to have properties such as cold resistance, wear resistance, stress cracking resistance, atmospheric aging resistance, solvent resistance, and chemical corrosion resistance to meet the requirements of impact resistance, aging resistance, and anti-breaking Requirements, at the same time to achieve conditions such as light weight and easy processing. Materials that meet these conditions are mainly low carbon steel in metals and glass fiber reinforced polypropylene (GMT) in composites. Their performance is relatively stable, and they can also meet the performance requirements of fenders under various conditions of use.
After the heat treatment and surface treatment (plating, spraying, etc.) of the low carbon steel plate in the metal material, its performance is stable, easy to machine, and installation is relatively simple. GMT in composite materials not only has the above properties, but also has a lower density than steel plates, and can be directly processed into finished products without surface treatment, which can greatly reduce production costs. At the same time, GMT is a composite material, which can be recycled and reused, and the pollution generated during production and processing is even less. GMT is the English abbreviation for Glass Mat Reinforced Thermoplastics Sheet.The matrix resin used is mainly polypropylene (PP) resin, and the content of glass fiber is generally 20% to 45% (mass fraction). It is a thermoplastic composite material. Compared with traditional thermosetting composite materials, it has a short molding cycle, good toughness, low density, and can be recycled. It is called the green industrial material of the 21st century. . Considered one of the new materials of the century.