Guided by: epoxy board, also known as epoxy glass fiber board, epoxy phenolic laminated glass cloth, epoxy resin is generally refers to molecules containing two or more epoxy groups of organic polymer compounds, except for a few, Their relative molecular mass is not high. The molecular structure of epoxy resin is characterized by the presence of active epoxy groups in the molecular chain. The epoxy group can be located at the end, in the middle or in a ring structure of the molecular chain. Due to the presence of reactive epoxy groups in the molecular structure, they can be cross-linked with various types of curing agents to form insoluble, infusible polymers having a three-dimensional network structure.
Epoxy board, also known as epoxy glass fiber board, epoxy phenolic laminated glass cloth board, epoxy resin is generally refers to organic molecules containing two or more epoxy groups in the molecule, with the exception of individual, their The relative molecular mass is not high. The molecular structure of epoxy resin is characterized by the presence of active epoxy groups in the molecular chain. The epoxy group can be located at the end, in the middle or in a ring structure of the molecular chain. Due to the presence of reactive epoxy groups in the molecular structure, they can be cross-linked with various types of curing agents to form insoluble, infusible polymers having a three-dimensional network structure.
Epoxy board is mainly used in electrical and electronic equipment for insulation structure, such as circuit breakers, switchgear, transformers, DC motors, AC contactors, explosion-proof electrical appliances and other electrical appliances.
Application characteristics
1, in various forms. A variety of resins, curing agents, and modifier systems can be adapted to suit the requirements of various applications, ranging from very low viscosity to high melting point solids.
2, easy to cure. With a variety of different curing agents, the epoxy resin system can be cured in the temperature range of 0-180°C.
3, strong adhesion. The presence of polar hydroxyl groups and ether bonds inherent in the epoxy resin chain gives it high adhesion to various substances. The shrinkage of the epoxy resin when cured is low and the resulting internal stress is small, which also helps to increase the adhesive strength.
4, low shrinkage. The reaction of the epoxy resin and the curing agent used is carried out by direct addition reaction or ring-opening polymerization of epoxy groups in the resin molecules, without the release of water or other volatile by-products. Compared with unsaturated polyester resins and phenolic resins, they show very low shrinkage (less than 2%) during curing.
5, mechanical properties. The cured epoxy resin system has excellent mechanical properties.
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