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Fiberglass Yarn Types

Glass fiber is also known as fiberglass which is the most important fiber in the reinforced polymer industry and one of the most versatile fibers by far . It is divided into alkali free glass fiber, alkali containing glass fiber, alkali resistant glass fiber, high-strength glass fiber, and so on.
There are many types of fibers made of glass, used for specific purposes. Generally, the content of silicon dioxide exceeds 50%, and the composition of different mineral oxides gives the product unique characteristics. The various glass types are shown below.
Fiberglass yarn type
A-glass fiber, made of sodium lime silicate. Used where E-glass resistivity is not required. A-Glass fiber is the main glass used for containers and window glass.
AR glass fiber, also known as alkali resistant glass fiber, is a 100% inorganic fiber that is an ideal substitute for steel and asbestos in non load-bearing cement components. Alkali resistant glass fiber is characterized by good alkali resistance, effective resistance to the erosion of high alkali substances in cement, strong gripping force, high modulus of elasticity, impact resistance, tensile strength, and bending strength, strong incombustibility, frost resistance, temperature resistance, and humidity change resistance, excellent crack resistance, and permeability resistance, with strong designability, easy molding, and other characteristics, Alkali resistant glass fiber is a new type of green and environmentally friendly reinforcing material widely used in high-performance reinforced (cement) concrete.
C-glass fiber - refers to medium alkali glass fiber, which is made of calcium borosilicate and is corrosion resistant glass. Used in acidic and corrosive environments.
D-glass fiber – Low dielectric constant glass made from borosilicate. For electrical applications.
E-glass fiber - Alkali free high resistance glass fiber made from aluminum oxide calcium borosilicate. E-glass is known in the industry as a general-purpose fiber due to its strength and resistance. It is the most commonly used fiber in the fiber reinforced polymer composite industry.
ECR glass fiber – E-glass made of calcium aluminate with higher resistance to acid corrosion. Used where strength, conductivity, and acid corrosion resistance are required.
R-Glass Fiber – A reinforced glass made of calcium aluminosilicate, used where higher strength and acid corrosion resistance are required.
S-glass fiber – High strength glass made from magnesium aluminum silicate. Used where high strength, high hardness, extreme temperature resistance, and corrosion resistance are required.

The fibers used in structural reinforced composites are generally classified into three categories: E-glass, AR-glass, and S-glass. Of all the fibers available for structural reinforcement and reinforcement, E-glass is currently the most widely used and cheapest.

Fiberglass Type	Density g/cm³	Tensile Strength kg/cm²	Elastic modulus	Elongation at break
A-glass	2.44	3300	7.2	4.8
AR-glass	2.7	1700	7.2	2.3
C-glass	2.56	3300	6.9	4.8
D-glass	2.11	2500	5.5	4.5
E-glass	2.54	3400	7.2	4.7
ECR-glass	2.72	3400	8.0	4.3
R-glass	2.52	4400	8..6	5.1
S-glass (also S-2 glass)	2.53	4600	89	5.2