Polyphenylene sulfide is a new functional engineering plastic.

PLA (Polylactic Acid) PLA, also known as polylactic acid, is a biodegradable and environmentally friendly polymer. Its production process is pollution-free, and the material can naturally degrade, making it one of the most representative green plastics. The structure of PLA has a significant impact on its heat resistance, toughness, mechanical strength, degradability, and biocompatibility. Among these, heat resistance is a key limitation. PLA molecular chains contain only one methylene group, forming a spiral structure with low chain mobility. As a result, PLA exhibits slow crystallization during injection molding, leading to low crystallinity and poor heat resistance. Additionally, during thermal processing, ester bonds may break, generating terminal carboxyl groups that accelerate thermal degradation through autocatalysis. LGF Reinforced PLA Long fiber reinforcement significantly enhances the performance of PLA. Fibers act as a structural skeleton within the polymer matrix, restricting molecular chain movement under heat and thereby improving thermal resistance. Various fibers can be used for PLA reinforcement, including: Natural plant fibers (sisal, flax, bamboo, coconut fiber, wood fiber) Animal fibers (silk) Mineral fibers (basalt fiber) Synthetic fibers (carbon fiber, glass fiber) Among these, carbon fiber and glass fiber are widely applied due to their high strength and modulus, while natural fibers are gaining attention for their sustainability and biodegradability. Studies show that reinforced PLA composites can achieve a Vicat softening temperature exceeding 140°C, significantly improving thermal performance compared to pure PLA. Comparison with Short Fiber (SGF) Compared to short fiber reinforced materials, long glass fiber (LGF) composites offer superior mechanical performance: 1–3 times higher toughness 50–100% increase in tensile strength and stiffness Better suitability for large structural parts Injection Molding Laboratory Warehouse Certifications Xiamen LFT Composite Plastic Co., Ltd. Xiamen LFT Composite Plastic Co., Ltd. specializes in long fiber reinforced thermoplastics (LFT & LFRT), including Long Glass Fiber (LGF) and Long Carbon Fiber (LCF) materials. Our materials are suitable for injection molding, extrusion (LFT-G), and direct molding (LFT-D). Fiber lengths can be customized from 5–25 mm according to customer requirements. Our products are manufactured using advanced continuous fiber impregnation technology and are certified under ISO9001 and IATF16949 systems, with multiple patents and registered trademarks.

PP (Polypropylene) Reinforced with Long Glass Fiber Polypropylene (PP) is one of the most widely used general-purpose thermoplastics, known for its low cost, excellent chemical resistance, and good processability. However, its inherent limitations—such as low strength, low heat resistance, poor stiffness, and weak low-temperature impact performance—restrict its use in structural applications. By introducing reinforcing materials such as glass fibers, the mechanical properties of PP can be significantly enhanced. When the fiber length exceeds the critical reinforcement size, the material performance improves dramatically. Long Glass Fiber Reinforced PP (LFT-PP) is a high-performance thermoplastic composite, typically supplied in pellet form with a length of 12–25 mm and a diameter of about 3 mm. The glass fibers inside maintain nearly the same length as the pellets, ensuring superior load transfer and mechanical strength. Fiber content can range from 20% to 70%, and colors can be customized according to customer requirements. Advantages of PP-LGF Long fiber length significantly improves mechanical strength and stiffness High impact resistance, suitable for automotive and furniture applications Excellent creep resistance and dimensional stability for precision parts Superior fatigue resistance under long-term loading Stable performance in high temperature and humid environments Reduced fiber breakage during molding due to optimized processing flow LGF vs SGF Compared with short glass fiber (SGF) reinforced materials, long glass fiber (LGF) composites provide: Higher mechanical strength and toughness Better load-bearing capacity Improved fatigue and creep resistance More stable performance in structural applications Applications Automotive Industry: front-end modules, door modules, gearshift systems, electronic pedals, instrument panel frames, cooling fan systems, battery trays, bumper brackets, underbody shields, sunroof frames, etc. Home Appliance Industry: washing machine drums, structural brackets, air conditioner fan systems, replacing metal or short glass fiber reinforced materials. Electrical & Electronics: connectors, relay bases, coil frames, microwave transformer housings, solenoid valve components, scanner parts, etc. Other Applications: power tools, pump housings, bicycle frames, ski components, helmet structures, safety footwear parts, replacing PA, PPO and metal materials. Processing Certification About Us Xiamen LFT Composite Plastic Co., Ltd. was established in 2009 and is a global supplier specializing in long fiber reinforced thermoplastic materials. We integrate R&D, production, and global marketing. Our products have passed ISO 9001 and IATF 16949 certifications and are widely used in automotive, aerospace, military, new energy, medical devices, wind energy, sports equipment, and industrial applications.