Properties and Applications of Glass Fibers for Reinforcing Composite Materials

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In the past more than half a century, fiber-reinforced composite materials have been widely used due to their excellent properties, and the important role of reinforcing fibers in composite materials is self-evident.

At present, the most common reinforcing fibers include glass fibers, aramid fibers, carbon fibers, etc. This article will introduce the characteristics and applications of glass fibers for composite reinforcement.

What is fiberglass?

Glass fibers are widely used due to their cost-effectiveness and good properties, mainly in the composites industry. Hebei Yuniu Fiberglass Manufacturing Co., Ltd. produces spun fibers for weaving.

Glass fibers have both filaments and chopped strand fiberglass or flocs. Glass filaments are commonly used in composite materials, rubber products, conveyor belts, tarpaulins, etc. Short fibers are mainly used in non-woven felts, engineering plastics and composite materials.

Attractive physical and mechanical properties of glass fibers, ease of manufacture and compatibility with carbon fibers
The low cost of dimensional comparison makes it the material of choice for high performance composite applications. Glass fibers are composed of oxides of silica and have excellent mechanical properties.

Fiberglass properties

The main characteristics of glass fiber include the following aspects:

Not easy to absorb water: fiberglass woven roving is water repellent , because sweat will not be absorbed,because the material is not affected by water, it will not shrink.

High Strength: Fiberglass is extremely strong, almost as strong as Kevlar. However, when the fibers rub against each other, they break and cause the fabric to take on a shaggy appearance.
Insulation: In chopped fiberglass form, fiberglass is an excellent insulator

Heat Resistance: Glass fibers have high heat resistance, can withstand temperatures up to 315°C, they are not affected by sunlight, bleach, bacteria, mold, insects or alkalis.

Susceptible:Fiberglass are affected by hydrofluoric acid and hot phosphoric acid. Since the fiber is a glass-based product, some raw glass fibers should be handled with care, such as household insulation materials, because the fiber ends are fragile and can pierce the skin, so gloves should be worn when handling fiberglass.

Application of fiberglass

Fiberglass is an inorganic material that does not burn and retains about 25% of its initial strength at 540°C. It is an excellent electrical insulating material. Woven glass fiber fabric have properties such as low moisture absorption, high strength, heat resistance and low dielectric constant, making them ideal reinforcements for printed circuit boards and insulating varnishes.

The high strength-to-weight ratio of fiberglass makes it an excellent material for applications requiring high strength and minimal weight. For example, waterproofing fiber mesh, this strength can be unidirectional or bidirectional, allowing flexibility in design and cost for a wide range of applications in the automotive market, civil construction, sporting goods, aerospace, marine, electronics, Home and wind energy. They are also used in the manufacture of structural composites, printed circuit boards and various special-purpose products.

They are also used in the manufacture of structural composites, printed circuit boards and various special-purpose products. The world's annual glass fiber production is about 4.5 million tons, and the main fiberglass producers are China (60% market share), the United States and the European Union.

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