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Characteristics and applications, advantages and disadvantages of fiberglass reinforced plastic materials

February 22, 2024

Fiberglass reinforced plastic is a material that increases the range of use by adding glass fiber and other additives to the original pure plastic. Generally speaking, most fiberglass reinforcement materials are used in the structural components of products and are a type of structural engineering material; For example: PP, ABS, PA66, PA6, PC, POM, PPO, PET, PBT, PPS.




1. After glass fiber reinforcement, glass fiber is a high-temperature resistant material. Therefore, the heat resistance temperature of reinforced plastics is much higher than before without glass fiber, especially nylon plastics.


2. After glass fiber reinforcement, the addition of glass fiber restricts the mutual movement of polymer chains in the plastic, resulting in a significant decrease in the shrinkage rate of the reinforced plastic and a significant increase in its rigidity.


3. After fiberglass reinforcement, the reinforced plastic will not crack under stress, and at the same time, the impact resistance of the plastic is greatly improved.


4. After glass fiber reinforcement, glass fiber is a high-strength material, which greatly enhances the strength of plastics, such as tensile strength, compressive strength, and bending strength, which are greatly improved.


5. After glass fiber reinforcement, the combustion performance of the reinforced plastic decreases significantly due to the addition of glass fiber and other additives, and most materials cannot be ignited, making them a flame-retardant material.




1. After fiberglass reinforcement, due to the addition of fiberglass, it becomes transparent without fiberglass and becomes opaque.


2. After fiberglass reinforcement, the toughness of all plastics decreases while the brittleness increases.


3. After glass fiber reinforcement, due to the addition of glass fiber, the melt viscosity of all materials increases, the flowability decreases, and the injection pressure increases significantly compared to those without glass fiber.


4. After fiberglass reinforcement, due to the addition of fiberglass, the flowability is poor. In order to achieve normal injection molding, the injection temperature of all reinforced plastics is increased by 10 ℃ -30 ℃ compared to before without fiberglass.


5. After fiberglass reinforcement, the addition of fiberglass and additives greatly enhances the moisture absorption performance of the reinforced plastic. Even pure plastics that did not absorb water before will become absorbent. Therefore, drying is necessary during injection molding.


6. After glass fiber reinforcement, during the injection molding process, glass fiber can enter the surface of plastic products, making the surface of the products very rough and spotted. In order to achieve high surface quality, it is best to use a mold temperature machine to heat the mold during injection molding, so that plastic polymers can enter the surface of the product, but it cannot achieve the appearance quality of pure plastic.


7. After glass fiber reinforcement, glass fiber is a material with high hardness. After the high-temperature volatilization of additives, it becomes a highly corrosive gas, which causes significant wear and corrosion to the screws and injection molds of injection molding machines. Therefore, when producing molds and injection molding machines using such materials, attention should be paid to the surface anti-corrosion treatment and surface hardness treatment of the equipment.