Due to the rapid development of the polymer chemistry and electrical industry in recent years, it is particularly significant in the field of insulation materials. For example, the heat resistance and flame retardant properties of 3240 epoxy resin boards are becoming higher and higher. Electrical strength, mechanical properties and electrical insulation properties. From the current point of view, most insulating materials are realized using halogen-containing flame retardants. This kind of material will not only cause serious pollution to the environment but also cause harm to the human body. So what is the flame retardant principle of 3240 epoxy?

Epoxy board processed parts

In order to obtain the 3240 epoxy resin board with excellent flame retardant and heat resistance, the high temperature resistant resin is pre-inserted into the molecules of the phosphorus-containing flame retardant to obtain a high temperature resistant flame retardant and then the flame retardant is modified with epoxy phenolic resin. Because the phosphorous polymer combustion chamber easily generates a non-combustible phosphoric acid liquid film with a boiling point of 300 degrees, it can isolate oxygen and dehydrate the phosphoric acid to generate metaphosphoric acid. The metaphosphoric acid is further polymerized into polymetaphosphoric acid, and it can dehydrate the polymer to form carbon The layer adheres to the surface of the 3240 epoxy board, while lowering the temperature.

Remind everyone that the flame retardant is divided into additive type and reactivity. The former will not react with the matrix, but when the amount must reach 50%, the flame retardant effect is good, but it affects the mechanical properties of the 3240 epoxy board. At present, the application of phosphorus-based flame retardants is becoming more and more widespread. It is a more common method to use phosphorus-based reactive flame retardants to modify 3240 epoxy boards.

The performance of 3240 epoxy resin board

We all know that 3240 epoxy resin board is a type of epoxy board that we often say. Its temperature resistance level is F level, that is, it can withstand 155 degrees high temperature, has good mechanical properties and dielectric properties, and is suitable for Machinery manufacturing insulation parts, transformer skeletons, etc. It is an insulating board made by combining glass cloth and epoxy resin through lamination and other processes. The common one in China is the insulating board

3240 epoxy resin board has an insufficient performance, that is, it is not flame retardant. Therefore, it is far less than the FR-4 epoxy board in the field of application. In the processing process, it can generally be processed by high-speed steel or cemented carbide tools. From the current perspective, the performance and quality of the 3240 epoxy resin board on the market are uneven. Therefore, the performance of the 3240 epoxy resin board requires everyone to polish their eyes. After all, safety production is the first guarantee, so I hope you will not believe some insulating boards on the market that are below the market price. The 3240 epoxy resin board has excellent mechanical properties and shrinkage properties and generates small internal stress which can improve the adhesion strength.