How Long Is “long Glass Fiber” in Reinforced LFT Material Plastics?

Long Glass Fiber Reinforced Plastics (LFT) refers to modified composite materials containing glass fibers with a length of 10 to 25 mm, referred to as LFT Material. Xiamen LFT-G® Company uses LFT-Granules, which are fiber-impregnated and wrapped with resin, to form LFT composites with a length of glass fibers of more than 5 mm by cutting the granules and other processes.

Then, How long is "long glass fiber" in LFT Reinforced plastics?

The length of glass fiber in the resin matrix is too short, only play the role of filler, do not play the role of enhancement; If too long, although the enhancement effect is significant, but affects the dispersion of glass fiber in the resin matrix, molding and processing performance and product performance.

Therefore, it is generally believed that the ideal length of glass fiber in the thermoplastic tree matrix should be 5 times its critical length. Critical length refers to a given diameter of fiber reinforced thermoplastics in the glass fiber to withstand the stress to reach its impact fracture stress value necessary for the minimum length.After many years of experience in materials research by LFT-G's Engineered Materials Division, the better mechanical properties of LFT Composite are maintained by keeping the fiber length in LFT Composite at 10-12mm (1/2 inch).

As one type of LFT material, the use of LFT PP composite materials to partially replace structural body parts and interior and exterior decorative parts is a proven method for automotive light weighting. Among many composite materials, long glass fiber reinforced polypropylene (PP-LGF) has gained more favor due to its low price, excellent mechanical properties and environmental friendliness.