What do epoxy insulation materials include?

Epoxy insulation material is a kind of high-performance insulation material based on epoxy resin, which has good insulation, heat resistance and mechanical strength. It is widely used in electrical, electronic and other fields.

What is epoxy resin?

Epoxy resin refers to a polymer containing more than two epoxy groups (-CH2-O-CH2-). It has good chemical stability, machinability and mechanical properties. And it has been widely used in many fields. At room temperature, epoxy resins are solid and need to be heated to change into a flowing state.

What products do epoxy insulation materials include?

1.‌Epoxy sheet

‌Epoxy sheet ‌includes ‌G11 epoxy sheet, ‌G10 epoxy sheet, ‌3240 epoxy sheet and ‌FR4 epoxy sheet, etc. These epoxy sheets have different characteristics and uses.

· G11 epoxy sheet：G11 epoxy sheet is a hard cardboard-like insulating material made of imported electronic-grade alkali-free fiber glass cloth impregnated with imported epoxy resin, and added with corresponding imported flame retardants, adhesives, and other additives and processed by hot pressing. This material has high heat resistance, mechanical performance, and dielectric properties. G11 epoxy sheet is widely used in insulation components in motors, electrical equipment, as well as in aircraft, high-speed trains, transformer insulation boards, etc. It can also be used in humid environments and transformer oil. And it is suitable for high-voltage switchgear, high-voltage switches, and other occasions.

· G10 epoxy sheet：G10 epoxy sheet is a composite material made of fiber glass cloth and epoxy resin. Its color is generally aqua green. The glass transition temperature is 130°C. And the electrical breakdown voltage is greater than 60kv. G10 epoxy sheet originally developed for use in aircraft, and it is capable of withstanding great forces without deformation. This material has insulating and acid-alkali resistance properties, and is not permeable to water vapor or liquids, while being lightweight. These characteristics make G10 epoxy sheet an ideal choice for the manufacture of switchgear, transformers, explosion-proof appliances, etc.

· 3240 epoxy sheet：3240 epoxy sheet is an insulating material that mainly composed of electrical fiber glass cloth impregnated with epoxy resin and processed through drying and hot pressing. The temperature resistance grade of 3240 epoxy sheet is Class B, and colors include yellow, red, green, and black. The surface of 3240 epoxy sheet should be smooth, free of bubbles, pits, and wrinkles, with allowable defects that do not affect its use, such as scratches, indentations, stains, and minor spots. The edges should be neatly cut, and the end faces should be free from delamination and cracks. The thickness of 3240 epoxy sheet is typically 0.5 to 50mm, but can also be produced in thicknesses of 50 to 150mm as required. ‌3240 epoxy sheet is cheap and often used in low-grade, mid-grade electrical products.

· FR4 epoxy sheet：FR4 epoxy sheet is a common composite material that is widely used in the manufacture of electronic circuit boards. It consists of fiber glass cloth and imported epoxy resin, and has high mechanical properties, dielectric properties, electrical insulation properties. The insulation class is F, and the main colors are white (primary), light green, black and yellow. ‌FR4 epoxy sheet is often used in the manufacture of insulation plate, transformer insulation board, grinding gear‌.

2. Epoxy resin castable

Epoxy resin castable is an insulation material composed of epoxy resin, curing agent, filler and auxiliaries. It can be molded by the casting process and cured to form a hard insulator. Epoxy resin castable has high mechanical strength and electrical insulation properties. It is often used in winding insulation of motors, transformers, and support insulation of switchgear.

3. Epoxy resin adhesive

Epoxy resin adhesive is a kind of adhesive with excellent bond strength and insulation properties. It can be used to bond metals, ceramics, glass and other materials, while providing good electrical insulation protection. In the electronics industry, epoxy adhesives are often used in circuit board assembly, component fixing and other processes.

4. Epoxy resin paint

Epoxy resin paint is a kind of coating with epoxy resin as the main film forming substance. It has excellent corrosion resistance, wear resistance and electrical insulation properties. It can be used to protect the metal surface of electrical equipment to prevent corrosion and electrical failure. Epoxy resin paint is widely used in the insulation protection of generator, motor, transformer and other electrical equipment.

There are many kinds of epoxy insulation materials with different characteristics, which are widely used in various fields such as electrical and electronic. These products not only provide good electrical insulation protection, but also enhance the mechanical strength and corrosion resistance of the equipment. They provide strong support for the development of the electrical and electronic industry.