S glass Application

Main application of S glass

1 Aerospace

At present, S glass accounts for 20%-30% of the material market in world aviation industry. Common materials include Glare laminate, S glass unidirectional prepreg and S glass woven fabric. It is widely use as aircraft interior materials, floor, hatch, wing leading edge, radome, auxiliary fuel tank, helicopter wing and so on.

2 Defense Military

S glass has large elongation at break and good impact resistance,an ideal material for absorbing energy. The composite laminate with S glass roving and phenolic resin can be used in various military applications or bulletproof armor for civilian purposes.

3 General Civil Industry

3-1 Automotive Industry

Utilizing the high temperature resistance of S glass, it is used as a muffler filler to reduce noise; S glass and rubber material are combined to make a timing belt. This timing belt is more resistant to high temperature and corrosion than the metal chain in the automobile engine.

3.2 Pressure vessel reinforcement

S glass fiber can be directly used to wind various high-pressure gas cylinders (medical, coal mine, fire fighting, mountain sports), or used together with carbon fiber to enhance the impact resistance and friction resistance of the cylinder.

3.3 Motor Industry

The traditional steering ring is mostly a metal ring, which is not only low in strength but also insulative. The reinforcing ring produced by S glass not only has good insulation performance, but also can reach 2-3 times of the steel ring. It can ensure that the rotor shaft generates strong centrifugal force under high-speed operation and plays a fixed role on the enameled wire.

3.4 High-strength grille

The S glass has high strength and good corrosion resistance, and can be used for producing an ultra-long span grid, and the interval of the longitudinal ribs can be very large. The high-strength grille products passed the US Coast Guard test. It is widely used in offshore oil platforms, pedestrian passages, ship decks, subways, coal mines and other emergency escape routes or life-saving places.

3.5 Wind power generation

The power generation of a single wind turbine is proportional to the square of the length of the wind blade, which requires the wind blade size to be as long as possible to increase power generation efficiency and reduce power generation costs. The enlargement of the blade requires the blade itself to have a high rigidity and hardness to avoid bending deformation of the blade and collision of the tower body during strong wind.

3.6 Sports and leisure industry

S glass is used as a fiber-reinforced material to produce onshore and aquatic items such as skis, surfboards, yachts, and sailboats. It can also be used to manufacture fishing rods, hockey sticks, baseball bats and softball bats.

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S glass properties

Compared with common E glass fiber, S glass fiber has the following six characteristics: high tensile strength, high elastic modulus, good rigidity&high beak elongation , good impact resistance, good chemical stability, high temperature resistance&fatigue resistance and good radar wave .

1 Tensile strength and elastic modulus of S glass

The tensile strength and elastic modulus of S glass fiber are increased by 30%-40% and 16%-20%, respectively, than E glass fiber. Composites made of high-strength glass fibers have a strength and modulus that are nearly 50% higher than those of composites made of E glass.

2 Impact resistance

The break elongation indicates the ability of the fiber to resist impact deformation and is an important indicator of the impact resistance of the material. The elongation of the high-strength glass fiber is more than 5%. Compared with aramid fiber and carbon fiber, it has the largest deformation ability under certain stress and can fully absorb impact energy. This property determines that S glass can be used as an ideal bulletproof material.

3 fatigue resistance

The fatigue resistance of S glass fiber is 10 times higher than that of E-glass fiber. The modified characteristics determine that the composite material made of S glass has a longer working life.

4 Chemical stability characteristics

S glass has high chemical stability, and its strength retention rate after boiling, pickling and alkali washing is higher than that of E glass.

5 High temperature resistance

S glass fiber is melted at a higher temperature than E-glass fiber with a higher softening point. Usually, S glass fiber is 100-150 degrees Celsius more than E-glass fiber.

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What’s S glass

In 1938, Owens Corning invented the E glass, and then the United States Air Force required to develop a glass fiber with higher strength and modulus than the E glass fiber, which because of its high strength, named S glass.

S glass has a tensile strength increase of 30%-40% compared with conventional E glass, and the elastic modulus is increased by 15%-20%. In 1968, the commercialized product S2 glass was launched.

After 1998, S2 glass was produced and sold by AGY.

Since the 1970s, China has successfully developed its own HS series S glass with independent intellectual property rights, and its product performance is close to S2 glass AGY.

S Glass Fiber

In recent years, with the increasing demand, S glass has been developed rapidly in developed countries such as North America and Europe. The annual demand has increased by more than 25% since 2004. S glass fiber is mainly produced by  AGY Company. Its production and sales account for 80% of the world. In China, S glass is a new material that the government encourages to develop, and its develop speed is also very fast.

SiO2-Al2O3-MgO2 or SiO2-Al2O3-CaO-MgO is the main system of S glass. The mass fraction of various S glass components is slightly different, but the content of main oxides is higher than that of E-glass, among which the content of Al2O3 are all around 25%.

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