In recent years, long glass fiber modified PP is extremely popular in the modified plastic industry. Long glass fiber reinforced PP material price is low, has the excellent performance no less than reinforced engineering plastics; Comprehensive these two points show the advantage of high cost performance, by the industry is widely optimistic. At present, these manufacturers have invested a lot of manpower and material resources in the production and development of this type of material and market development.

So what is long glass fiber modified PP?

PP material

As one of the general plastic materials, PP has excellent comprehensive performance, good chemical stability, better molding performance and relatively low price. But PP has low strength, modulus, hardness, low temperature impact resistance strength, forming shrinkage, easy aging and other shortcomings.

Generally speaking, the tensile strength of PP material is between 20~30MPa, the bending strength is between 25~50MPa, and the bending modulus is between 800~1500MPa. Therefore, it is modified to adapt to the needs of products. Nowadays, each kind of modified PP has a large number of applications in the field of household appliances and vehicles.

Long glass fiber

Glass fiber is a kind of inorganic non-metallic material with excellent performance. The advantages are good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, but the disadvantages are brittle and poor wear resistance. One of the main uses of glass fiber is to reinforce composite materials.

Long glass fiber generally refers to the length of more than 10mm glass fiber.

Long glass fiber reinforced PP plastics

Long glass fiber reinforced PP plastic refers to the modified PP composite material containing glass fiber length in 10 to 25mm, after injection molding and other processes to form glass fiber length greater than 3.1mm three-dimensional structure, abbreviated as LGF-PP. Many materials at home and abroad refer to Long fiber reinforced thermoplastic as LFT (that is, long-fiber reinforce thermoplastic). From the material definition, LGFPP belongs to a kind of LFT.

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

Generally 12 mm or 25 mm in length, diameter of about 3 mm columnar particles. The 12mm or so length of the grain is mainly used for injection molding, and the 25mm or so length of the grain is mainly used for pressure molding. In this particle, the glass fiber has the same length as the particle, the glass fiber content can vary from 20 to 70 percent, and the color of the particle can be matched according to the customer's requirements.

Why does Ford use long glass fiber reinforced PP instead of short glass fiber reinforced PP?

In order to improve the strength of glass fiber in plastics, the length of glass fiber must be greater than its critical length Lo. The relevant data show that when the fiber length is less than the critical length of the fiber reinforced plastics subjected to a certain load, the fiber will be pulled out, the fiber strength can not get full play. The critical length Lo is specific to the plastic variety. In the case of glass fiber reinforced polypropylene, the Lo is 3.1mm.

The results show that the failure mode is mainly the fiber is pulled out and cannot meet the strength requirement of the module carrier material. Therefore, the development and application of long glass fiber reinforced polypropylene and its injection molding technology, is to prepare the reinforced glass fiber length of about 10mm polypropylene raw materials, and through the improved injection molding process, ensure that the length of glass fiber in the product is more than 3.1mm.

Advantages of LFT compared with short fiber reinforced thermoplastic composites:

The mechanical properties of the product are obviously improved by the longer fiber length.

High specific stiffness and strength, good impact resistance, especially suitable for automotive applications.

The creep resistance is improved, the dimensional stability is good, and the parts forming precision is high.

Excellent fatigue resistance.

Better stability in hot and humid environments.

The fiber can move relatively in the molding mold during the molding process, and the fiber damage is small.

Long glass fiber reinforced PP manufacturing process

There are three production processes: GMT, LDT-G and LDT-D

Long glass fiber reinforced PP application

Industria del automóvil: módulo frontal, módulo de puerta, mecanismo de cambio, pedal de acelerador electrónico, esqueleto de tablero, ventilador y marco de refrigeración, soporte de batería, soporte de parachoques, placa de protección de bajos, marco de techo corredizo, etc., utilizados para reemplazar PA reforzado o materiales metálicos.

Industria de electrodomésticos: tambor de lavadora, soporte triangular de lavadora, tambor de una máquina de cepillo, ventilador de aire acondicionado, etc., utilizado para reemplazar PA reforzado con fibra de vidrio corta, ABS o materiales metálicos.

Comunicación, electrónica, industria de electrodomésticos: conectores de alta precisión, componentes de encendido, eje de bobina, base de relé, marco/marco de bobina de transformador de horno de microondas, conector eléctrico, paquete de válvula solenoide, componentes de escáner, etc. Otros: carcasa de herramienta eléctrica, bomba de

agua o carcasa de medidor de agua, impulsor, esqueleto de bicicleta, esquís, pedales de locomotoras terrestres, cascos de seguridad militar/civil, zapatos de seguridad, etc., utilizados para reemplazar PA reforzada con fibra de vidrio corta, PPO, etc.

Sobre nosotros

Xiamen LFT composite plastic Co., Ltd es una empresa de marca que se enfoca en LFT y LFRT. Serie de fibra de vidrio larga (LGF) y Serie de fibra de carbono larga (LCF). El termoplástico LFT de la compañía se puede usar para moldeo por inyección y extrusión LFT-G, y también se puede usar para moldeo LFT-D. Se puede producir de acuerdo con los requisitos del cliente: 5 ~ 25 mm de longitud. Los termoplásticos reforzados con infiltración continua de fibra larga de la compañía han pasado la certificación del sistema ISO9001 y 16949, y los productos han obtenido muchas marcas comerciales y patentes nacionales.