Generally, epoxy resin sheet manufacturers on the market are phenolic epoxy sheet, with yellow color, generally it is not used as a hard circuit board substrate, but used for electrical insulation. FR4 is a pure epoxy sheet of NEMA standard. Its normal color should be dark green, which is the actual color of epoxy material. There are also yellow ones. Generally speaking, yellow FR4 is called yellow material, and white (green) is called white material. FR-4 is more expensive than epoxy material, only according to the fiberglass sheet surface cannot confirm the price.

Glass fiber sheet, also known as fiberglass sheet, is generally used for soft-packing base layer, and then wrapped with fabric, leather, etc., it is used for making beautiful wall and ceiling decoration. The application is very extensive. Good performance such as sound absorption, sound insulation, heat insulation, environmental protection, flame retardant and so on.

FR-4 is also known as fiberglass sheet; fiberglass sheet; FR4 reinforcing sheet; FR-4 epoxy sheet; flame retardant insulation sheet; epoxy sheet, FR4 light sheet; epoxy glass cloth sheet; circuit sheet drilling pad.

Fiberglass sheet alias: fiberglass insulation sheet, glass fiber sheet (FR-4), glass fiber composite sheet, its made of glass fiber material and high heat resistance composite material, it does not contain harmful asbestos components. It has high mechanical and dielectric properties, good heat resistance,moisture resistance, and good processability. It is used in plastic molds, injection molds, machinery manufacturing, molding machines, drilling machines, injection molding machines, motors, PCB.ICT fixtures, countertop polishing pads.