Glass fiber reinforced PP is based on the original pure PP, 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.
advantage:
1. Glass fiber is a high temperature resistant material. Therefore, the heat resistant temperature of reinforced plastic is much higher than before the addition of glass fiber.
2. Due to the addition of glass fiber, the mutual movement of the polymer chains of the plastic is restricted. Therefore, the shrinkage rate of the reinforced plastic is greatly reduced, and the rigidity is also greatly improved.
3. Reinforced plastics will not stress cracking, and the impact resistance of plastics will increase a lot.
4. Glass fiber is a high-strength material, which also greatly increases the strength of plastics, such as tensile strength, compressive strength, and bending strength.
5. Due to the addition of glass fiber and other auxiliaries, the flammability of reinforced plastics is much reduced, and flame retardation becomes difficult.
Disadvantages:
1. Before the glass fiber is transparent, it will become opaque.
2. Plastics have reduced toughness and increased brittleness.
3. The melt viscosity of all materials increases, the fluidity deteriorates, and the injection pressure is much higher than that without glass fiber.
4. Poor fluidity, the injection temperature of the reinforced plastic is increased by 10 ° C - 30 ° C before the addition of glass fiber.
5. Due to the addition of glass fiber and additives, the hygroscopic property of the reinforced plastic is greatly enhanced. The original pure plastic will not absorb water, so it must be dried during injection molding.
6. During the injection molding process, the glass fiber can enter the surface of the plastic product, making the surface of the product rough and spotted. In order to achieve a higher surface quality, it is preferable to use a mold temperature machine to heat the mold during injection molding, so that the plastic polymer enters the surface of the product, but the appearance quality of the pure plastic cannot be achieved.
7. Glass fiber is a material with high hardness. The high-volatility of the additive is a highly corrosive gas, which is very wear and corrosion on the screw and injection mold of the injection molding machine. Therefore, the mold and injection molding using such materials are produced. When the machine is concerned, pay attention to the surface anti-corrosion treatment and surface hardness treatment of the equipment.
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