Epoxy board is also called epoxy glass fiber board, epoxy glass fiber cloth laminate board, epoxy phenolic laminated glass cloth board, epoxy resin board, glass fiber board. Divided into halogen-free, environmental protection, flame retardant V0 level and other grades, usually flame retardant epoxy board has FR-4 epoxy board, 3240 epoxy board.

Epoxy board is made of glass fiber cloth bonded with epoxy resin under heating and pressure. It has high mechanical properties at medium temperature and stable electrical properties under high humidity. Suitable for mechanical, electrical and electronic parts with high insulation structure, with high mechanical and dielectric properties, good heat resistance and moisture resistance. Heat resistance class F (155 degrees). In the case of high temperature 180 ℃, it is deformed by heat. Generally, other metals cannot be heated in one piece, which may cause deformation of the metal sheet.

Epoxy board is mainly used in products with high performance electrical insulation requirements, such as FPC reinforcement boards, PCB drilling pads, glass fiber mesons, precision test boards, electrical (electrical) equipment insulation struts, insulation pads, high voltage Electrical insulation boards, motor insulation parts, electronic switch insulation parts, jig fixture test stands, PCB testing, and can be used in transformers under humid environmental conditions, can also be used for precision planetary gears (grinding gears), etc.

Thicknesses are: 0.1mm to 120mm, sheet specifications: 1020mm * 1220mm, 1220mm * 2440m.

Colors are white (aqua green), yellow, black, and colored.

FR-4 is a code for a grade of flame-resistant materials, which means a material specification that resin materials must be able to extinguish by themselves after burning. It is not a material name, but a material grade. There are many types of FR-4 grade materials used in boards, but most of them are composite materials made of so-called Tera-Function epoxy resin with filler and glass fiber.

FR-4 is a material standard stipulated by NEMA (American Electrical Manufacturers Association). The corresponding IEC International Electrotechnical Commission standard is EPGC202. There is no domestic standard that corresponds to it. The closest domestic standard is 3240 For oxygen laminated glass cloth board, the corresponding IEC International Electrotechnical Commission standard for 3240 is EPGC201, and there is only a difference in flame retardancy between EPGC201 and EPGC202. Therefore, it can be simply considered that FR-4 is an improved product with enhanced flame retardancy of 3240.

The performance characteristics of epoxy board are as follows for reference.

Vertical layer bending strength (normal state): E-1 / 150, 150 ± 5 ℃ ≥340Mpa

Parallel layer impact strength (simple supported beam method): ≥230KJ / m

Insulation resistance after immersion in water (D-24 / 23): ≥5.0 × 108Ω

Vertical layer direction electrical strength (in 90 ± 2 ℃ transformer oil, plate thickness 1mm): ≥14.2MV / m

Parallel layer breakdown voltage (in 90 ± 2 ℃ transformer oil): ≥40KV

Relative permittivity (50Hz): ≤5.5

Relative dielectric constant (1MHz): ≤5.5

Dielectric loss factor (50Hz): ≤0.04

Dielectric loss factor (1MHz): ≤0.04

Water absorption (D-24 / 23, plate thickness 1.6mm): ≤19mg

Density: 2.1g / cm³

Flammability: V0