Glass fibers are generally classified based on the composition of glass raw materials, diameter of single fibers, fiber characteristics, fiber appearance, etc. Glass fiber includes stranded untwisted rovings, direct untwisted rovings, short cut raw fibers, untwisted coarse gauze, glass fiber felt, friction materials, continuous glass fiber, etc.

1、 Classification of glass raw material composition: generally distinguished by different alkali metal oxide contents

(1) Alkali free fiber (commonly known as E-glass): R2O content less than 0.8%, it is an aluminum borosilicate component. It has good chemical stability, electrical insulation performance, and strength. Mainly used as electrical insulation material, reinforcement material for fiberglass, and tire cord.

(2) Medium alkali fiber: R2O content is 11.9% -16.4%, which is a sodium calcium silicate component. Due to its high alkali content, it cannot be used as an electrical insulation material, but its chemical stability and strength are still good. Generally used as base materials for latex, checkered fabric, acidic filter cloth, window screen, etc.

(3) High alkali fiber: a glass component with R2O content equal to or greater than 15%. Glass fibers made by drawing raw materials such as broken flat glass and broken bottle glass. Can be used as waterproof and moisture-proof materials such as battery separators, pipe wrapping fabrics, and felt sheets.

2、 Classified by single filament diameter: Glass fiber single filaments are cylindrical in shape, and their thickness can be expressed by diameter

(1) Coarse fiber: Its single fiber diameter is generally 30um

(2) Primary fiber: Its single fiber diameter is greater than 20um;

(3) Intermediate fiber: single fiber diameter 10-20um

(4) Advanced fiber: (also known as textile fiber) with a single filament diameter of 3-10um.

3、 Classified by fiber characteristics: fiber high-strength glass fiber; High modulus glass fiber; High temperature resistant glass fiber; Alkali resistant glass fiber; Acid resistant glass fiber; Ordinary glass fiber (referring to alkali free and medium alkali glass fiber); Optical fiber; Low dielectric constant glass fiber; Conductive fibers, etc

Additional Information:

Glass fiber (formerly known as glass fiber or fiberglass) is an inorganic non-metallic material with excellent performance, with a wide variety of types. Its advantages include good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. It is made from seven types of ores, namely pyrophyllite, quartz sand, limestone, dolomite, bornite, and bornite, through high-temperature melting, drawing, winding, weaving, and other processes. The diameter of its single fibers ranges from a few micrometers to over twenty micrometers, equivalent to 1/20 to 1/5 of a single hair. Each bundle of fiber raw fibers is composed of hundreds or even thousands of single fibers.

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