1. Composition and manufacturing process of glass fiber resin composite board
-Ingredients: Mainly composed of glass fiber and resin. Glass fiber is a reinforcing material that provides excellent mechanical properties such as high strength and high modulus, which can enhance the tensile, bending, and impact resistance of composite panels. Resin is the matrix material, commonly including polyester resin, epoxy resin, phenolic resin, etc. Polyester resin has low cost and good formability; Epoxy resin has excellent adhesion, chemical corrosion resistance, and mechanical properties; Phenolic resin is known for its excellent heat resistance and flame retardancy.
-Manufacturing process: usually using hand lay up method, spray method, molding method or extrusion method, etc. The hand pasting method is easy to operate and suitable for small batch production and the production of large products. Glass fiber and resin are hand pasted and molded in molds; The spraying method has high production efficiency, as glass fibers and resin are sprayed onto the mold simultaneously through a spray gun; The molding method is suitable for manufacturing products with complex shapes and high dimensional accuracy requirements. The prepreg is placed in a mold and molded under pressure and temperature; The pultrusion method is mainly used to manufacture products with a constant cross-sectional shape, such as profiles. Glass fibers are impregnated with resin and then pultruded in molds.
2. Performance characteristics of glass fiber resin composite board
-Excellent mechanical performance: The reinforcing effect of glass fiber makes the composite board have high strength and stiffness. Its tensile strength can reach tens to hundreds of megapascals, and it can withstand large external forces without deformation or fracture. For example, when used in building structures, it can withstand external forces such as wind and snow loads.
-Good corrosion resistance: The resin matrix has resistance to many chemicals, especially epoxy resin and phenolic resin, which can resist the corrosion of chemicals such as acid, alkali, salt, etc. This allows composite panels to be used in harsh environments such as chemical and marine environments, such as as as protective panels for chemical equipment or structural materials for marine platforms.
-Good electrical insulation performance: Glass fiber and most resins have good electrical insulation properties, making composite boards suitable for insulation components of electrical equipment. Its high insulation resistance can effectively prevent current leakage and ensure the safe operation of electrical equipment.
-Good dimensional stability: In environments with temperature and humidity changes, the dimensional changes of glass fiber resin composite panels are relatively small. This is because the thermal expansion coefficient of glass fiber is relatively low, which can limit the expansion and contraction of composite panels during temperature changes, enabling them to maintain dimensional accuracy in applications such as precision instrument equipment casings and electronic equipment substrates.
-Heat resistance and fire resistance: Depending on the type of resin, composite boards have a certain degree of heat resistance. The heat resistance of phenolic resin composite board is particularly outstanding, and its thermal deformation temperature is relatively high. At the same time, some composite panels can improve fire resistance and reduce fire risks by adding flame retardants, such as meeting relevant fire safety standards when used in building interiors and transportation interiors.
