Basic Division of Electrical Insulation Board and Its Price Difference

There are more than one type of insulation board, so it is necessary to know how to distinguish various insulation boards in case everyone’s interests will be damaged. First, let’s look at the basic division of insulation boards, includ……

There are more than one type of insulation board, so it is necessary to know how to distinguish various insulation boards in case everyone’s interests will be damaged. First, let’s look at the basic division of insulation boards, including phenolic paper-base board, epoxy fiberglass board, and composite board. What are the differences in performance and price?

The phenolic paper-base board is a kind of insulating laminated material made of phenolic resin as a binder and wood pulp fiber paper as a reinforcing material, and generally can be punched, has the advantages of low cost, low price, and relatively low density. The market competition is also fierce. Many insulation board manufacturers have produced this type of plate in China, but its operating temperature is lower, humidity and heat resistance are slightly lower than epoxy fiberglass cloth board.

Epoxy fiberglass cloth substrate is the FR4 insulation board that we often say. It is a kind of board with epoxy resin as adhesive and electronic grade glass fiber cloth as reinforcing material. Its bonding sheet and inner core thin insulating board are important substrates for making multilayer printed circuit boards(PCB). Because of its high operating temperature, its performance is less affected by the environment, so it has greater advantages in processing technology than other fiberglass fiber substrates.

The composite substrate mainly refers to the CEM-1 and CEM-3 composite-based insulation boards, using wood pulp fiber paper or cotton pulp fiber paper as the core material reinforcement material, and the glass fiber cloth as the surface layer reinforcement material, both of which are immersed with flame retardant resin. And then copper clad laminate board is produced.

In comparison, the price of FR4 insulation board is the most expensive among the above three types of substrates, and the price may vary depending on the color of the substrate. Among them, yellow is the basic color, in addition, there are white, black, etc., white and black are about 10% more expensive than yellow.

In addition, the difference between the CEM-1 insulation board and the FR4 insulation board can also be seen from the paper base. It is difficult to distinguish from the surface observation. The method is to break the substrate to distinguish the FR4 insulation board cut surface, there will be gray-white fiberglass clips, while there will be a white resin clip on the CEM cut surface. Just like the difference between cement board and reinforced concrete board, FR4 insulation board has stronger bending resistance than CEM1 insulation board.

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