Views: 75 Author: Site Editor Publish Time: 2022-07-07 Origin: Site
China Chuangbo has developed a complete set of equipment and technology for continuous extrusion and impregnation of polypropylene (PP) / glass fiber (GF), PP / basalt fiber (BF), nylon (PA) / carbon fiber (CF) long fiber pellets. Based on this technology, the residual fiber length in the prepared LFT-G products exceeds the critical length, so the reinforcement effect is remarkable, and the tensile strength of the resin can generally be increased by more than 3-5 times, which is significantly better than the short fiber reinforced (SFT) system.
LFT-G raw material can be efficiently and rapidly formed by injection molding process, so it has become an important development direction of thermoplastic composite materials, and it is also the main way for thermoplastic composite materials to be widely used in structural and secondary structural parts. The next development trend is to combine long fiber with continuous fiber reinforcement technology, thus enabling the wide application of thermoplastic composites in the field of high-performance structures.
Fiber-reinforced thermoplastic composites are classified into three types: short glass fiber (SFT), long glass fiber (LFT)and continuous glass fiber (CFT) reinforced composites according to the length of fiber retention. Short glass fiber reinforcement (SFT) cannot adapt to occasions that require high material properties (especially tensile strength).
Continuous fiber reinforcement (PP/CRFT) has higher mechanical properties, but its molding process is complex, low efficiency, and higher cost.
PP is a general-purpose plastic. It is widely used in many fields of life and production due to its advantages such as low density, good processing performance and thermal stability, and low cost. Generally, GF and BF are used to enhance and modify it, to significantly improve its mechanical properties.
Glass fiber (GF) has good insulation, heat resistance, excellent mechanical strength, and is an ideal metal replacement material. Since the 1940s, GF has been used as a plastic reinforcement material, and GF reinforced thermoplastic resin is widely used in aerospace, electronic communication, automobile lightweight parts manufacturing and other fields due to its excellent mechanical strength, good heat resistance and creep resistance.
Basalt fiber (BasaltFibre, BF) is made of natural basalt ore. After crushing and melting at 1450 ° C ~ 1500 ° C, it is made of platinum-rhodium alloy wire drawing bushing. It has many unique and excellent properties such as heat insulation, moisture-proof, waterproof, fireproof, acid and alkali resistance, heat preservation, sound absorption, good tensile strength, corrosion resistance, long-term use without deterioration and deterioration. Its raw materials are cheap and have certain advantages in the field of reinforcing fibers.
Carbon fiber (Carbon Fibre) is a new generation of reinforced fiber materials. At present, the total production capacity of carbon fiber under construction in China exceeds 50,000 tons. Therefore, the application of carbon fiber in a wider range of industrial fields is the general trend. CF has light weight, high strength and high modulus. Its high performance and high added value can only be achieved by combining with resin to form fiber composites of different lengths.
Nylon (PA) is an important engineering plastic with excellent comprehensive mechanical properties. It has a wide range of applications in electronic appliances, automobiles, aerospace and high-speed rail. The use of carbon fiber reinforcement can further improve its tensile strength, especially long fiber reinforcement. After that, it can reach and exceed the performance of aluminum alloy, so it can be widely used in structural parts and load-bearing parts.
Long glass fiber reinforced composite materials are widely used in automobile, electronics, electricity, communication, machinery, chemical industry, military industry, sports equipment, medical equipment and other fields, especially in the application of special plastics for auto parts and accessories. The development potential is very huge. Some modified plastics enterprises with output of more than 10,000 tons in China have developed or introduced LFT-G technology by themselves, including Guangzhou Kingfa, Shanghai Genius, Pret, Nanjing Julong, etc.
With the continuous improvement of society's requirements for lightweight technology, the application of LFT-G technology and products in many fields continues to deepen, which will significantly promote the application and development of fiber-reinforced thermoplastic composites.
As a professional manufacturer of LFT-G Line, Chuangbo will never stop exploring LFT-G technology and bringing the latest related information. If you have any questions about LFT-G Line, don't hesitate to contact us!