February 3, 2026
Glass Fiber Reinforced Plastic (GFRP), commonly referred to as glass-filled plastic or fiberglass-reinforced polymer, is a broad category of composite materials created by combining a polymer resin matrix (like PP, PA, PET) with glass fibers. This process yields a versatile, high-performance material with properties superior to the base resin alone. Key features include:
(1) Excellent Corrosion Resistance to many chemicals and environmental factors.
(2) High Strength-to-Weight Ratio, being both lightweight and strong.
(3) Good Electrical Insulation properties.
(4) Favorable Thermal Properties, with enhanced heat deflection temperature.
(5) Excellent Processability via injection molding or compression molding.
(6) High Design Flexibility, allowing complex shapes. However, it also has limitations:
(7) A relatively Low Elastic Modulus compared to metals or carbon fiber composites.
(8) Limited Long-Term Continuous Service Temperature.
(9) Susceptibility to UV Aging if not stabilized.
(10) Relatively Low Interlaminar Shear Strength.
The primary advantages of using glass fiber reinforcement are substantial:
1. A dramatic increase in heat resistance, crucial for materials like nylon.
2. Significantly reduced shrinkage and greatly enhanced rigidity (stiffness).
3. Elimination of stress cracking tendencies and a notable improvement in impact resistance (in many cases).
4. Major increases in key mechanical strengths: tensile, compressive, and flexural.
5. Improved flame retardancy, as additives can be incorporated to meet various flammability standards.
