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Advantages & Disadvantages of Glass Fiber Reinforced Plastics

View:2914/06/2019  

Glass fiber reinforced plastic is based on the original pure plastic, adding glass fiber and other additives to improve the use of the material.

In general, most of the glass fiber reinforced materials are used in structural parts of the product and are a structural engineering material; for example: PP ABS PA66 PA6 PC POM PPO PET PBT PPS.

Advantage:

1. After the glass fiber is reinforced, the glass fiber is a high temperature resistant material. Therefore, the heat resistant temperature of the reinforced plastic is much higher than before the glass fiber is added, especially the nylon plastic;

2. After the glass fiber is reinforced, the addition of the glass fiber limits the mutual movement of the polymer chains of the plastic. Therefore, the shrinkage rate of the reinforced plastic is greatly reduced, and the rigidity is also greatly improved;

3. After the glass fiber is reinforced, the reinforced plastic will not be stress cracked, and at the same time, the impact resistance of the plastic is improved a lot;

4. After the glass fiber is reinforced, the glass fiber is a high-strength material, which also greatly increases the strength of the plastic, such as: tensile strength, compressive strength, bending strength;

5. After the glass fiber is reinforced, due to the addition of glass fiber and other additives, the combustion performance of the reinforced plastic is greatly reduced, and most of the materials cannot be ignited, which is a flame retardant material.

Disadvantages:

1. Due to the addition of the glass fiber, the plastics will become opaque, not transparent any more;

2. After the glass fiber is reinforced, the toughness of all plastics is reduced, and the brittleness is increased;

3. Due to the addition of the glass fiber, the melt viscosity of all materials increases, the fluidity becomes worse, and the injection pressure is much higher than that without the glass fiber;

4. After the glass fiber is reinforced, the fluidity is poor. For normal injection molding, the injection temperature of all reinforced plastics is increased by 10 ° C to 30 ° C;

5. The addition of glass fiber and additives enhances the hygroscopic property of plastics. Originally, pure plastics will not absorb water. But now they must be dried during injection molding.


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