Industry news: 1. As an important application field of epoxy resin, composite materials are increasingly showing a broad market prospect, and epoxy resin glass fiber reinforced plastic has become an important part of it. In many areas of the national economy. Experts said that it is also an important material in the field of defense technology, aerospace, and is listed as the highlight of epoxy resin composite materials.
2. The epoxy resin composite material is a low-pressure molding material composed of an epoxy resin matrix and a reinforcing material (fiber and fabric) through the interface between the two. According to its use, it can be roughly divided into structural composite materials, functional composite materials and general-purpose composite materials. Structural composite materials focus on the combination of thousands of mechanical properties. They are mainly used for load-bearing components and have certain performance properties such as heat resistance and humidity resistance. Functional composites focus on functional compounding but also require certain mechanical properties. Epoxy functional composite materials are mainly used as corrosion-resistant materials, wave-transmitting materials, etc.; general-purpose epoxy composite materials are mainly used for general components that are not stressed and have low performance requirements. Epoxy structural composite materials are usually loaded with continuous long fibers (such as carbon fiber, aramid fiber, high-strength glass fiber, etc.) according to the force design orientation and quantitative laying due to the large load-bearing. Since functional composite materials and general composite materials do not have very high requirements on mechanical properties, in order to facilitate manufacturing and reduce costs, glass cloth and felt are often used as reinforcement materials, collectively referred to as epoxy glass fiber reinforced plastics.
3. Epoxy glass fiber reinforced plastics do not require very high mechanical properties, and generally do not make detailed structural design. The thickness of the glass fiber reinforced plastics can be estimated according to the load size and the strength of the glass fiber reinforced plastic standard sample under the set glue content , You can find the number of glass cloth or determine based on past experience. According to experts, most of the matrix resin used in FRP is unsaturated polyester resin. This is due to its low price in the morning, good manufacturability, and other acceptable properties. Epoxy fiberglass is used only when polyester fiberglass cannot meet the requirements. . In other words, epoxy glass fiber reinforced plastics are only used in occasions with high performance requirements, such as load-bearing liquid storage tanks and tank trucks.
4. There are many molding methods for composite materials. Because epoxy glass fiber reinforced plastics are only used as high-performance products, some molding methods are rarely used in epoxy composite materials. The molding methods of epoxy composite materials mainly include: the pasting method (wet method) is mainly used for the molding of epoxy glass fiber reinforced plastics; the laying method (dry method) is mainly used for the molding of high-performance epoxy structural composite materials; the winding method is mainly used for The forming of hollow revolving products; the pultrusion method is mainly used for the forming of epoxy composite profiles. The characteristic of epoxy composite molding process is low pressure molding (pressure <2.5Ma). This is because there is basically no low-molecular volatiles generated when the epoxy resin is cured, and high-pressure molding is not required. In addition, epoxy composite materials often have large areas and uneven shapes. If high-pressure molding is used, the cost is too high. At present, the application fields of epoxy fiberglass are very wide, such as: building envelopes, acid storage tanks, acid-resistant pumps, fans, chemical pipelines, reaction tanks, containers, car shells, yachts, minesweeper boats, submarine components, buoys, Speedboat, electric pole, motor guard ring, radome, pontoon, etc.