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What is the difference between FR4 board, glass fiber board and epoxy board?

Views: 2     Author: Site Editor     Publish Time: 2022-03-29      Origin: Site

Fiberglass board (FR4)Also known as FR4 light board; Fiberglass board; FR4 reinforcement board; FR4 epoxy resin board; FR5 burning insulation board; epoxy board, FR4 board, FR5 board light board; epoxy glass cloth board;FR4 is a code name for a flame-resistant material grade, which means a material specification that resin materials must be able to extinguish themselves after being burned. It is not a material name, but a material grade with high mechanical and dielectric properties. , good heat resistance and moisture resistance, and good machinability.

The flatness of the board is better than that of plastic.Therefore, there are many types of FR4 grade materials used in general circuit boards at present, but most of them are composites made of so-called four-function (Tera-Function) epoxy resin plus filler (filler) and glass fiber. Material. Features: high insulation, high temperature resistance, chemical resistance, high mechanical strength, good flatness.

Fiberglass board (FR4), is an inorganic non-metallic material with excellent performance.It is made of pyrophyllite, quartz sand, limestone, dolomite, boronite, and boronite as raw materials through high-temperature melting, wire drawing, winding, and weaving. From a few microns to more than twenty microns, equivalent to 1/20-1/5 of a hair, each bundle of fiber precursors consists of hundreds or even thousands of single filaments.The glass fiber is often used as reinforcing material of composite material, electrical insulation and heat insulation materials, substrate and other national economy fields.

FR4 boardFiberglass panels, epoxy board, what is the difference between the three?

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 glass fiber cloth, epoxy board: binder is epoxy resin, FR4: base material cotton fiber paper.All three are fiberglass panels.

2. Different colors.Usually the epoxy board on the market is phenolic epoxy, yellow.It is not used as the base material of rigid circuit boards, and for electrical insulation purposes.FR4 is a NEMA standard pure epoxy sheet, and the normal color is dark green, which is the color of epoxy.There are also yellow ones. Generally speaking, yellow FR4 is called yellow material, and white (green) is called white material.FR4 is more expensive than epoxy board, and the price of glass fiber board cannot be confirmed.

3. Different in nature.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 glass fiber board; glass fiber board; FR4 reinforcement board; FR-4 epoxy resin board; flame retardant insulation board; epoxy board, FR4 light board.Epoxy glass cloth board; circuit board drilling backing board.

Epoxy boards and glass fiber boards contain active epoxy groups in their molecular structure, which can cross-link with various types of curing agents to form insoluble and infusible high polymers with a three-way network structure.

Fiberglass is versatile and can be used for a variety of purposes.

glass fiberIt is a fiber-reinforced plastic that uses glass fibers that can be rearranged, flattened into sheets, or woven into fabrics.Fiberglass was originally combined with polyester resin for wool home insulation.This combination creates a durable composite material used in a variety of industries around the world.

Fiberglass is lightweight, durable, and strong.It is impact resistant, corrosion resistant and has a moderately high strength to weight ratio.It is very flexible and can be made into various shapes, which adds to its value.Since fiberglass is a low-cost and highly elastic material, it is used in various household products and industries.Some common fiberglass planes, windows, roofs, boats and bathtubs.This high temperature insulating material is also a good heat insulator

glass fiberSome applications of fiberglass can be seen in our daily life or industry, such as breweries using fiberglass grids as bottling linings.Piers and piers also use fiberglass as a protective barrier to keep corrosion and rust from the natural elements.The application of fiberglass has greatly aided the shipbuilding industry due to the cost-effectiveness of fiberglass materials.These positive factors surrounding fiberglass also exist in the cooling tower industry.Cooling towers are often wet areas that require rust and corrosion protection.This versatile product is also used as a screen to differentiate hazardous areas.
Fiberglass board (FR4)
Fibersheet/EPOXY epoxy resin
fiberglass boardFR4

Product Description:

1. Fiberglassplate: Yellow, light green, black-common, black-antistatic (please consult separately)
※Board surface: both glossy and matte, please contact us for details.
2. Fiberglassround rod: Yellow (unrepaired)/green (filamentous)
3. Fiberglasspipe:Light green (filament/winding)
4. Glass fiber tape: please inquire
※All pipes can be painted (please inquire separately) ※Wound fiber pipes are all made-to-order products

glass fiber


Good mechanical strength, acid and alkali resistance, extremely low water absorption and high insulation, the highest temperature resistance can reach 180~200°C (continuous 2hr).
The material itself has the flame resistance of UL-94V0 grade, and the withstand voltage is 150KV.
glass fiber


1. FiberglasssheetIt is generally used in flexible circuit (FPC) reinforcement boards, electronics, motors, communications and other insulating parts.
2. Fiberglassthick plateGenerally used in PCB fixtures, test boards, electronics, and motor insulation materials.

fiberglass board

Glass Fiber Board (FR4) Performance Table

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