What is the difference between 3240, FR4 and G11 epoxy sheets?

Let’s first understand the characteristics of 3240 epoxy sheet.

3240 epoxy sheet is made of electric glass cloth and epoxy resin by hot pressing. There are no bubbles, pitting or wrinkles on the surface. It has excellent mechanical properties, excellent mechanical properties, arc resistance, specifications and other characteristics. For example, in the medium temperature, 3240 epoxy resin sheet can give full play to its mechanical properties; In high temperature environment, it can give full play to its electrical properties. Therefore, due to these characteristics, epoxy resin sheet is very suitable for high insulation structural parts of electrical, electronic and other fields.

But its processed materials of 3240 epoxy resin sheet are halogenated. The halogen elements here are fluorine, chlorine, bromine, iodine and Ah. They act as flame retardants but are toxic. If burned, they give off harmful gases such as dioxins and benzofurans. They also have a strong smoke smell, easy to cause cancer and have great harm. Therefore, the use of halogen-free epoxy plates is now advocated. So its material is not very environmentally friendly, there is a certain harm to the environment and human body. But the price is relatively cheap.

What are the characteristics of FR4 board?

FR4 board is usually aqua green in color. It is made of special electronic cloth, epoxy resin and other materials by high temperature and high pressure. Compared with 3240 epoxy sheet, it has the advantages of high temperature resistance (grade B), insulation, dielectric, flame retardant (94V-0 standard), moisture-proof, good toughness, smooth surface, no pits and thickness tolerances. FR4 board is suitable for high performance electronic insulation products. Even today's high speed and bullet trains use this insulation material. FR4 board can be simply understood as an upgrade to 3240 epoxy sheet.

What are the characteristics of garolite g11 sheet?

Garolite g11 sheet is the best of the three models. At present, the thermal stress in epoxy resin sheet is high, up to 288℃. Its heat resistance value is as high as 160-180 degrees, especially low water absorption rate (water absorption rate is almost 0. 24 hours later, water absorption rate is only: 0.09%). Garolite g11 sheet is the best choice of high voltage switchgear, high-end electrical and electronic products. But the price is naturally higher than the previous two models.

Garolite g11 sheet has high mechanical and dielectric properties, good heat and moisture resistance, as well as good processing performance. G11 fiberglass sheet is used for plastic abrasives, injection abrasives, machine manufacturing, molding machines, drilling machines, injection molding machines, motor, printed circuit board fixture, and table grinding pad.