Epoxy Resin Fiberglass Prepreg For G10, G11, FR3, FR4 Laminated Board

Fiberglass Prepreg is a semi-cured sheet composite material made by pre-impregnating glass fiber fabric with epoxy resin. It remains stable at room temperature, but when heated and pressurized, the resin flows and cures, bonding with the fibers to form a high-strength, lightweight, corrosion-resistant final product.
Primarily applied in aerospace (e.g., aircraft components, satellite structures), wind power (wind turbine blades), sports equipment (high-end racquets, bicycle frames), automotive industry (lightweight body parts), and shipbuilding sectors. Its advantages include excellent process consistency, high production efficiency, and the ability to fabricate complex-shaped high-performance structural components, making it one of the key materials for achieving lightweight design.
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Product description

Fiber arrangement:

Unidirectional

Fiberglass Prepreg: Single fiber direction: The fibers are basically arranged in one direction in the prepreg, and all fibers are distributed in parallel along the same direction. This makes the material have extremely high strength and stiffness in this specific direction. For example, when making structures such as aircraft wings and wind turbine blades, unidirectional glass fiber prepregs can be laid in key parts according to the direction of force to give full play to its excellent performance in a specific direction.
Strong directionality: Due to the unidirectional arrangement of fibers, the mechanical properties of unidirectional glass fiber prepregs have strong directionality. In the fiber direction, it can withstand huge tensile stress, but in the direction perpendicular to the fiber, the performance is relatively weak. For example, when subjected to lateral forces, unidirectional prepregs may be prone to delamination or breakage.

Fiberglass Prepreg:

Fiber interlaced arrangement: Glass fibers exist in the form of fabrics, and the fibers are interlaced to form different weaving structures, such as plain weave, twill, satin, etc. This weaving structure allows the fibers to be distributed in multiple directions, so that the material has certain strength and stiffness in different directions. For example, when making some structural parts that need to withstand multi-directional stress, glass fiber fabric prepreg can better adapt to complex stress conditions.
Relatively small anisotropy: Compared with unidirectional prepreg, glass fiber fabric prepreg has smaller anisotropy. Although the performance in different directions will still vary, it is not as extreme as unidirectional prepreg. This makes fabric prepreg advantageous in some applications that require more balanced isotropic performance.

Mechanical properties:

Unidirectional Fiberglass Prepreg:
High strength and high modulus: In the fiber direction, unidirectional glass fiber prepreg has very high tensile strength and elastic modulus. This allows it to withstand large tension and stress, and is suitable for structural parts with extremely high strength requirements. For example, in the aerospace field, unidirectional prepreg is often used to manufacture the main load-bearing structural parts of aircraft, such as fuselage frames, wing beams, etc.
Low lateral performance: However, in the direction perpendicular to the fiber, the strength and stiffness of unidirectional prepreg are lower. This is because the fiber is less distributed in this direction and the bonding effect of the resin is relatively weak. Therefore, when designing and using unidirectional prepregs, special attention should be paid to avoid excessive lateral force to avoid material damage.
Glass fiber fabric prepreg:

Multi-directional performance balance: The performance of Fiberglass Prepreg in different directions is relatively balanced. Due to the interwoven structure of the fibers, it can disperse stress in multiple directions, thus having good shear, torsion and impact resistance. For example, in automobile manufacturing, fabric prepreg can be used to make body structural parts that can withstand collision forces and vibrations from different directions.
Moderate strength and modulus: Although the strength and modulus of fabric prepreg may not be as high as those of unidirectional prepreg in the fiber direction, it can provide relatively reliable mechanical properties as a whole. At the same time, fabric prepreg has good flexibility, is easy to process and form, and is suitable for the production of complex-shaped structural parts.

 

Fiberglass Prepreg:

Laying is relatively easy: The fiber interlaced structure of glass fiber fabric prepreg makes it relatively easy to operate during the laying process. Since the fibers are distributed in multiple directions, the fiber direction does not need to be strictly controlled like unidirectional prepreg, so a simpler laying method can be used. For example, when making composite products by hand, fabric prepreg is easier to lay and adjust, which is suitable for small-scale production and personalized customization.

Simple tooling: Fabric prepreg has relatively low tooling requirements during the molding process. Due to its small anisotropy, deformation caused by inconsistent fiber directions is not likely to occur during the curing process. Therefore, simpler fixtures can be used, reducing production costs and process difficulty.

Benefits:

  • High tensile strength and elastic modulus

  • Good flexibility, easy to process and form

  • Good shear, torsion and impact resistance

Specifications:

Service:

  • Free Sample

  • Small batch trial orders can be accepted in the early stage

  • Product Usage Guide

  • Cost accounting and stable supply capability