1. Different uses. The main raw materials for the production of circuit board are alkali free glass cloth, fiber paper and epoxy resin. Fiberglass board: base material fiberglass cloth, epoxy board: the binder is epoxy resin, FR4: base material cotton fiber paper. All three are fiberglass.
2、颜色不同。通常市面上的环氧板是酚醛环氧，黄色。不作为硬质线路板基材，电工绝缘用途。FR4是NEMA标准的纯环氧板材，正常的颜色是墨绿色，这是环氧的颜色。也有黄色的，一般说黄色的FR4叫黄料，白色的（绿色）叫白料 。FR4 比 环氧板贵，玻纤板无法确认价格。
2. Different colors. Usually the epoxy board on the market is phenolic epoxy, yellow. It is not used as hard circuit board substrate for electrical insulation. FR4 is NEMA standard pure epoxy plate. 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 fiberglass 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, also known as fiberglass board; Fiberglass board; FR4 reinforcing plate; FR-4 epoxy resin board; Flame retardant insulating board; Epoxy plate, FR4 smooth plate. Epoxy glass cloth plate; Circuit board drilling pad.
Epoxy board and glass fiber board contain active epoxy groups in the molecular structure, which can cross-linked with various types of curing agents to form insoluble and non molten polymers with three-dimensional network structure.
FR-4 epoxy glass fiber cloth substrate is a kind of substrate with epoxy resin as adhesive and electronic glass fiber cloth as reinforcing material. Its adhesive sheet and inner core thin copper clad laminate are important substrates for making multilayer printed circuit boards.
Properties: the mechanical properties, dimensional stability, impact resistance and moisture resistance of epoxy glass fiber cloth substrate are higher than those of paper substrate. Excellent electrical performance, high working temperature, and its performance is less affected by the environment. In the processing technology, it has great advantages over the glass fiber cloth base plate of other resins. This kind of products are mainly used for double-sided PCB, with a large amount.
应用：环氧玻纤布基板，应用更广泛的产品型号为FR-4 ，由于电子产品安装技术和PCB 技术发展需要，又出现高Tg 的FR-4 产品。
Application: epoxy glass fiber cloth substrate. The most widely used product model is FR-4. Due to the development needs of electronic product installation technology and PCB technology, FR-4 products with high Tg appear.
All three are fiberglass.
Generally, the epoxy board on the market is phenolic epoxy and yellow. It is generally not used as the base material of hard circuit board. It is used for electrical insulation.
FR4 is NEMA standard pure epoxy plate. The normal color should be 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.