Epoxy Glass Sheet is manufactured using electronic-grade alkali-free fiberglass fabric impregnated with epoxy resin and other modified materials, followed by high-temperature and high-pressure lamination. Epoxy Glass Sheets feature excellent electrical insulation, flame retardancy, high temperature resistance, and strong mechanical performance.
Epoxy Glass Sheets are widely used in electric motors and electrical equipment, wind power and hydropower systems, rail transportation, aerospace and marine industries, fixtures and molds, electronic heating systems, and control systems requiring insulation structural components. They are also used as new decorative structural materials in high-speed rail and railway vehicle systems.
FR-4 Epoxy Glass Sheet is manufactured by bonding glass fiber fabric with epoxy resin under heat and pressure. It maintains high mechanical strength at medium temperatures and stable electrical performance at elevated temperatures.
FR-4 is a laminated board produced from specialized electronic-grade fiberglass fabric impregnated with epoxy-phenolic resin and cured under high temperature and high pressure. It offers excellent mechanical strength, dielectric properties, good heat resistance, moisture resistance, and excellent machinability.
FR-4 Epoxy Glass Sheet is widely used as insulation structural components in electrical and electronic equipment, including switches, FPC reinforcement, electrical insulation parts, carbon film printed circuit boards, PCB drilling backup boards, and mold fixtures and test jigs. It is also suitable for use in humid environments and transformer oil conditions.
Thickness: 0.1 – 150 mm
Length: 1020 – 1220 mm
Width: 1220 – 3300 mm
l Wide formulation flexibility
Epoxy resin systems can be adapted to a wide range of application requirements by selecting different resins, curing agents, and modifiers. Viscosity can range from very low viscosity liquids to high-melting solid systems.
l Flexible curing conditions
By selecting different curing agents, epoxy resin systems can cure within a temperature range of 0°C to 180°C.
l Strong adhesion performance
The polar hydroxyl and ether groups in the epoxy molecular structure provide strong adhesion to various substrates. Low curing shrinkage also helps reduce internal stress and improve bonding strength.
l Low shrinkage rate
Epoxy resin curing occurs via addition reaction or ring-opening polymerization without releasing water or volatile by-products. Compared with unsaturated polyester and phenolic resins, epoxy systems show very low shrinkage (typically below 2%).
l Excellent mechanical properties
After curing, epoxy resin systems exhibit outstanding mechanical strength and structural stability.
Vertical bending strength (normal condition): ≥ 340 MPa
Vertical compressive strength: ≥ 350 MPa
Parallel impact strength: ≥ 33 kJ/m²
Parallel shear strength: ≥ 30 MPa
G10 is a glass fiber reinforced epoxy laminate, where “G” refers to glass fiber and “10” indicates the fiberglass content ratio in this material system. G10 is composed of electronic-grade fiberglass fabric combined with epoxy resin.
It meets UL94 V-0 flame retardant rating, offers continuous operating temperature up to 180°C, and short-term temperature resistance up to 288°C. It maintains good mechanical strength at elevated temperatures and provides excellent insulation, acid and alkali resistance, and moisture resistance.
G10 Epoxy Glass Sheet is suitable for electrical equipment requiring high insulation performance and higher temperature resistance, including industrial electrical systems and precision insulation applications.
3240 is manufactured by impregnating electronic-grade alkali-free fiberglass fabric with epoxy-phenolic resin and curing under heat and pressure. It offers high mechanical strength and reliable electrical insulation performance.
3240 is widely used in Class B electrical motors and electrical equipment as insulation structural components, as well as in other industrial insulation applications.
YILONG supplies high-quality Epoxy Glass Sheet materials and precision CNC-machined insulation components for global electrical, electronics, transportation, and industrial applications.
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Epoxy Glass Sheet is manufactured using electronic-grade alkali-free fiberglass fabric impregnated with epoxy resin and other modified materials, followed by high-temperature and high-pressure lamination. Epoxy Glass Sheets feature excellent electrical insulation, flame retardancy, high temperature resistance, and strong mechanical performance.
FR-4, which we commonly refer to in the PCB industry, is not actually a specific material name. It is a flame-retardant grade designation.
Phenolic Cotton Cloth Laminate is manufactured by impregnating cotton fabric with phenolic resin, followed by curing under heat and pressure. It is classified as a Thermal Class E insulating material and provides excellent mechanical properties, oil resistance, and reliable dielectric performance.
Epoxy Sheets are widely used in electrical and electronic applications due to their excellent combination of heat resistance, corrosion resistance, wear resistance, light weight, and electrical insulation properties.
Bakelite sheet, also known as Phenolic Paper Laminated Sheet, is manufactured using high-quality bleached wood pulp paper and cotton linter paper as reinforcing materials. These substrates are impregnated with phenolic resin produced from high-purity synthetic petrochemical raw materials and then processed through heat and pressure lamination.
Electrical resistance is the reciprocal of conductance, and resistivity refers to the resistance per unit volume of a material. The lower the conductivity of a material, the higher its resistance. For Electrical Insulation Materials, higher resistivity is always preferred. A higher resistivity indicates better insulation performance and lower leakage current under electrical stress.
If you're struggling to choose among various electrical insulation materials, this guide compares five commonly used laminated insulation sheets: 3240 epoxy sheet, FR4 Fiberglass Sheet, Bakelite Sheet, Phenolic Cotton Cloth Laminate, and Phenolic paper laminate, helping you quickly identify the most suitable material for your application.
Is your microwave oven suddenly failing to work? Are high-temperature industrial machines experiencing frequent breakdowns? In many cases, the problem may be traced back to a critical component—the mica board.
In today’s electronic era, electronic products are deeply integrated into our daily lives and are evolving at a rapid pace. It is difficult to imagine modern life without them. Epoxy glass sheets are a key insulating material widely used in electronic products. There are many types, including FR-4 Epoxy Glass Sheet, 3240 Epoxy Sheet, G11 Epoxy Glass Sheet, and G10 Epoxy Glass Sheet, each designed to meet different application requirements. Among them, G11 Epoxy Glass Sheet is considered one of the higher-performance materials, and it is important to understand its characteristics before use.
YILONG provides high-quality epoxy glass laminates widely used as engineering insulation materials. Among them, G10 Epoxy Glass Sheet and G11 are two commonly referenced grades in electrical and industrial applications. Although they share similar base structures, their performance and working environments differ due to material composition and manufacturing variations.
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