Now the epoxy sheet on the market can be divided into halogen-free and halogen-free.The halogen epoxy sheet is added with fluorine, chlorine, bromine, iodine, astatine and other halogen elements to play a role in flame retardation.Although the halogen element is flame retardant, in case it is burned, it will release a lot of toxic gases, such as dioxins, benzofurans, etc., with heavy taste and thick smoke, it is easy to cause cancer when it enters the human body and seriously threatens life and health.

Halogen-free epoxy sheet, in order to achieve the effect of flame retardant, the main addition is phosphorus element nitrogen element.When the phosphorous resin is burned, it is heated and decomposed to form polyphosphoric acid.Poly phosphoric acid can form a layer of protective film on the surface of the epoxy plate, put an end to direct contact with air, there is not enough oxygen, the fire is naturally extinguished.And the phosphorus-containing resin in the combustion will produce incombustible gas, further achieve the effect of flame retardant.

In addition to being environmentally friendly and flame retardant, halogen-free epoxy sheet have many other advantages.It is often used as an insulating material, so the insulation performance is very good.It can play the role of support and insulation of various electronic components, in the harsh environment, such as humidity, high temperature, but also can work normally.Halogen-free epoxy sheets also have good thermal stability, thanks to the nitrogen and phosphorus elements, the ability of nitrogen and phosphorus resin molecules to move when heated.In addition, it does not absorb water, strong flexibility and other advantages.

As early as a few years ago, the European Union has banned the use of halogen-free epoxy sheets, but because of the high cost of halogen-free epoxy sheets, it has not been widely used in China, and many manufacturers are still using halogen epoxy sheets.With the development of China’s economy and the improvement of people’s awareness of environmental protection, the excellent performance of halogen-free epoxy board has been well received by people. I believe that in the near future, it will certainly be popular.