What is G-10

By Bester PCBA

Last Updated: 2023-12-25

Table of Contents

What is G-10

G-10, or Glass Fiber 10, is a high-pressure fiberglass laminate material. It is created by stacking multiple layers of glass cloth that are soaked in epoxy resin and then compressing the resulting material under heat until the epoxy cures. This process forms a tough and durable composite material.

The designation “10” in G-10 refers to the percentage of glass fiber in the G-10 sheet, which was initially 10%. G-10 was first used as a substrate for printed circuit boards and has since become favored in the industry due to its desirable properties.

G-10 possesses excellent insulation properties, making it suitable for electrical applications. It is also resistant to acid and alkali corrosion, as well as wear. Additionally, G-10 has a high level of electrical insulation and chemical resistance. These properties are maintained not only at room temperature but also under humid or moist conditions. G-10 is known for its low moisture absorption, high strength, and resistance to penetration by oil and other liquids. The density of G-10 insulation boards is low, making the processed products lightweight and handy. Furthermore, G-10 has a high hardness, which makes it suitable for various applications.

G-10 materials are commonly used in aviation due to their favorable properties. They are also used in various everyday items, such as tool holders like knives. However, it is important to note that G-10 should be handled with care, especially during cutting or grinding processes. The dust generated from cutting or grinding G-10 can contribute to respiratory disorders and increase the risk of developing lung cancer. Therefore, appropriate ventilation and the use of masks or respirators are necessary when working with G-10.

G-10 is generally safe to handle outside of extreme conditions. However, epoxy resin, which is used in the manufacturing process of G-10, is flammable. Once set on fire, epoxy resin will burn violently and release poisonous gases. Due to these hazards, similar materials like FR-4, which contain flame retardant additives, have replaced G-10 in many applications.

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