virgin polypropylene pellet pp recycle granules pp UV resistance

PP Polypropylene long glass fiber pellets

When a fiber-reinforced plastic with a fiber length less than this critical length is subjected to a certain load, the fiber will be pulled out, and the strength of the fiber cannot be fully exerted. The critical length Lo is related to the specific plastic type. In terms of glass fiber reinforced polypropylene, its Lo is 3.1 mm, while the glass fiber length of ordinary short fiber reinforced plastic is generally only 0.2 to 0.6 mm. This shows that the failure mode is mainly due to the fiber being pulled out and unable to meet the strength requirements of the module carrier material. Therefore, the development and application of long glass fiber reinforced polypropylene and its injection molding technology is to prepare polypropylene raw materials with a reinforced glass fiber length of about 10mm, and through an improved injection molding process to ensure that the glass fiber length in the product is 3.1mm the above.

The advantage of long glass fiber PP replacing nylon and glass fiber is the most obvious. As a vehicle module carrier material, this material can not only effectively improve the rigidity, impact strength, creep resistance and dimensional stability of products, but also make complex automotive module products. This is something that metal materials cannot do.