What is the classification for the most common fiberglass reinforcement material with high resistivity?

The classification for the most common fiberglass reinforcement material with high resistivity is E-glass. This type of glass fiber is widely used in various applications, including aerospace, automotive, and construction, due to its excellent electrical insulation properties and affordability. E-glass fibers are made from a specific combination of silica and alumina which results in a high resistivity, making them ideal for use in environments where electrical insulation is crucial. Additionally, E-glass has high tensile strength and good durability, further enhancing its utility in composite materials.

In contrast, other types of fiberglass, such as R-glass and S-glass, have different properties suited for specific applications. R-glass offers higher thermal resistance but is less common, while S-glass provides superior strength and is primarily used in high-performance applications like military and aerospace. C-glass, on the other hand, is designed for specific chemical resistance but does not have the same electrical insulating properties as E-glass. Consequently, E-glass is the best choice for applications requiring high resistivity and is recognized as the most common fiberglass reinforcement material.