773 565 5640

The Difference Between Epoxy Board, Fiberglass Board and FR-4 Epoxy Board

FR4 G10 Sheet, Light Green

Epoxy board, fiberglass board, and FR-4 epoxy board are actually called differently. Epoxy boards are also called fiberglass boards, but not all epoxy boards are FR-4. FR-4 is aqua, and epoxy boards are divided into 3240 and FR-4. Although they are all insulating materials, they still have their own characteristics.

1. Different uses.
The main raw materials for the production of circuit boards are alkali-free glass cloth, fiber paper, and epoxy resin.
Fiberglass board: base material fiberglass cloth,
Epoxy board: The adhesive is epoxy resin.
FR4: Base material cotton fiber paper.
All three are fiberglass boards.

2. Different colors.
Usually the epoxy board on the market is phenolic epoxy, which is yellow. Not used as base material for hard circuit boards or electrical insulation. FR4 is a NEMA standard pure epoxy sheet. The normal color is dark green, which is the color of epoxy.

3. Different properties.
Fiberglass board has the characteristics of sound absorption, sound insulation, heat insulation, environmental protection, flame retardant and so on.
FR-4 is also known as fiberglass board; fiberglass board; FR4 reinforced board; FR-4 epoxy resin board; flame retardant insulation board; epoxy board, FR4 light board. Epoxy glass cloth board; circuit board drilling pad.

Epoxy board is also called epoxy fiberglass board, epoxy phenolic laminated glass cloth board, and epoxy resin generally refers to organic polymer compounds containing two or more epoxy groups in the molecule. Except for a few, their The relative molecular mass is not high. The molecular structure of epoxy resin is characterized by active epoxy groups in the molecular chain. The epoxy groups can be located at the end, middle or in a cyclic structure of the molecular chain. Because the molecular structure contains active epoxy groups, they can undergo cross-linking reactions with various types of curing agents to form insoluble, infusible polymers with a three-dimensional network structure.

3240 epoxy board: The 3 in 3240 epoxy board represents laminates, which are also said to be pressed from multiple layers of cloth. 2 represents the inorganic substrate board, 4 represents that its maximum operating temperature is 155°, the heat resistance grade is Class B, and 0 represents the code of the product type. The color is mainly yellow. It is widely used in the manufacturing of electrical and mechanical insulating parts, and its performance is average.

FR4 epoxy board: The main material is imported semi-solid sheet, which still has high mechanical strength at room temperature of 150°C, good electrical performance in dry and wet states, flame retardant, using imported raw materials, domestic presses and standard processes. manufacture. Available in white, yellow, green, and black, they are used for insulating structural parts, fixtures, partitions, and supporting back plates in electrical, electronic and other industries.

The epoxy glass cloth board is yellow and made of epoxy resin. The epoxy fiberglass board is made of glass fiber and is usually aqua. Its temperature resistance is higher than that of the epoxy glass cloth board and its insulation properties are also better in all aspects. Compared with epoxy glass cloth board, the price is also higher. The basic properties of both of them are the same, they are both insulating, wear-resistant, high-pressure resistant, and corrosion-resistant.

Leave a Replay

About Me

Through advanced technology and sincere services, we are able to achieve a high degree of customer satisfaction. Mature production techniques and a professional staff allows us to provide premium engineering plastics and high-precision processing services for clients all over the world.

Recent Posts


Let's have a chat