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Which application areas are long glass fiber PP flowing to?

Views: 19     Author: Site Editor     Publish Time: 2022-06-09      Origin: Site

Which application areas are long glass fiber PP flowing to?

In recent years, long glass fiber modified PP has been extremely popular in the modified plastics industry. Long glass fiber reinforced PP material is cheap and has excellent performance no less than that of reinforced engineering plastics. The combination of these two points shows the advantages of high cost performance and is widely favored by the industry.

At present, these manufacturers have invested a lot of manpower and material resources in the production, research and development and market development of this type of material.

PP material

As one of the general plastic materials, PP has excellent comprehensive properties, good chemical stability, good molding performance and relatively low price; however, PP has low strength, modulus, hardness, poor low temperature impact strength, and molding. The disadvantages of large shrinkage and easy aging.

Therefore, it is modified so that it can be adapted to the needs of the product. Today, each modified PP has a large number of applications in the field of household appliances and vehicles. Today, each modified PP has a large number of applications in the field of household appliances and vehicles.

long glass fiber

Glass fiber (English name: glass fiber or fiberglass) is an inorganic non-metallic material with excellent performance. Its advantages are good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, but its disadvantages are brittleness, resistance Poor abrasiveness. One of the main uses of glass fiber is the reinforcement of composite materials. Long glass fiber generally refers to glass fiber with a length of more than 10mm.

Long glass fiber reinforced PP plastic

Long glass fiber reinforced PP plastic refers to a modified PP composite material containing glass fibers with a length of 10 to 25 mm. After injection molding and other processes, a three-dimensional structure with a glass fiber length greater than 3.1 mm is formed. The English is LongGlassFiberpolypropylene, abbreviated as LGFPP. There are many materials at home and abroad that refer to long fiber reinforced thermoplastics as LFT (ie Long-fiberreinforcethermoplastic). From the material definition point of view, LGFPP belongs to a kind of LFT.

As an automotive module carrier material, the material can not only effectively improve the rigidity, impact strength, creep resistance and dimensional stability of products, but also can make complex automotive module products.

Particle Morphology of Long Glass Fiber Reinforced PP

Generally, it is a columnar particle with a length of 12mm or 25mm and a diameter of about 3mm. Among them, the pellets with a length of about 12mm are mainly used for injection molding, and the pellets with a length of about 25mm are mainly used for compression molding. In this particle, the glass fiber has the same length as the particle, the content of glass fiber can vary from 20% to 70%, and the color of the particle can be matched according to customer requirements.

Why do some fields use long glass fiber reinforced PP instead of short glass fiber reinforced PP?

Compared with short fiber reinforced thermoplastic composites, LFT has the following advantages:

• Longer fiber length significantly improves the mechanical properties of the product.

• High specific stiffness and specific strength, good impact resistance, especially suitable for the application of auto parts.

• Improved creep resistance, good dimensional stability, and high part forming accuracy.

• Excellent fatigue resistance.

• Better stability in high temperature and humid environments.

• During the molding process, the fibers can move relatively in the molding die, and the fiber damage is small.

Where is long glass fiber reinforced PP often used?

auto industry

Front-end modules, door modules, shifting mechanisms, electronic accelerator pedals, instrument panel skeletons, cooling fans and frames, battery brackets, bumper brackets, underbody protection panels, sunroof frames, etc., are used to replace reinforced PA or metal materials. The application of this material in these fields has been greatly promoted in Europe, and the current consumption is 20,000T/Y.

Appliance industry

Washing machine drum, washing machine triangle bracket, one brush machine drum, air conditioner fan, etc., used to replace short glass fiber reinforced PA, APS or metal materials.

Communication, electronics, electrical appliances industry

High-precision connectors, igniter components, coil shafts, relay bases, microwave oven transformer coil frames/frames, electrical connectors, solenoid valve packages, scanner components, etc. in the communication electronics industry.


Power tool casings, water pump or water meter casings, impellers, bicycle frames, snowboards, ground motorcycle pedals, military/civilian safety helmets, safety shoe toe caps, etc., used to replace short glass fiber reinforced PA, PPO, etc.

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