PBT plastic Polybutylene terephthalate, (PBT), belongs to the polyester series, is made of 1.4-pbt butylene glycol (1.4-Butylene glycol) and terephthalic acid (PTA) or terephthalic acid ester (DMT) polycondensation, the molecular formula is (C8H8-C4H6-C3H3N)x, and through the blending process made of milky white translucent to opaque Crystalline thermoplastic polyester resin. PBT is one of the toughest engineering thermoplastics, it is a semi-crystalline material with very good chemical stability, mechanical strength, electrical insulation properties and thermal stability. Specific gravity: 1.31g/cm. Melting point: 225~275℃ Glass transfer temperature (Tg): 22-43℃ Rockwell hardness (R scale): 118 Water absorption: 0.34% Molding shrinkage: 1.7~2.3% PBT-LGF reinforced plastic Excellent mechanical properties, high mechanical strength, fatigue resistance and good dimensional stability, creep is also small. These properties also rarely change under high temperature conditions. The production of PBT consumes less energy. Excellent heat resistance, with a UL temperature index of 120 to 140°C after reinforcement, and excellent long-term outdoor aging. Good solvent resistance and no stress cracking. PBT can be easily flame-retarded up to UL94V-0 level, and it is easy to develop reactive or additive flame retardant grades because of its good affinity with flame retardants. Flame-retardant products are widely used in the electrical and electronic industry. Select PBT is easy to decompose when it meets water, so it should be used with caution in high temperature and high humidity environment. Borrowing excellent electrical properties, high volume resistivity and dielectric strength, excellent arc resistance, minimal moisture absorption, and stable electrical properties even in humid and high temperature environments, making it an ideal material for electronic and electrical parts. It is easy to be molded and secondary processed, and can be injection molded or extruded with common equipment. Due to the fast crystallization speed and good fluidity, the mold temperature is lower than other engineering materials, and it takes only a few seconds to process thin-walled parts, and only 40-60s for large parts. Datasheet for reference Application 1、Electronic appliances: fuseless wire breakers, electromagnetic switches, Chie transformers, appliance handles, connectors, shells, etc. 2、Automobile: door handle, bumper, distributor cover, fender, wire guard shell, wheel cover, etc. 3、industrial parts: OA fan, keyboard, fishing reel, parts, lampshade, etc. Product processing Injection molding Details Number Color Length Sample MOQ Package Port of Loading Delivery time PBT-NA-LGF30 Natural color (can be customized) 12mm (can be customized) Available 1 ton 25kg/bag Xiamen Port 7-15 days after shipment Lab & Factory Frequently asked questions Q. Does long glass fiber and long carbon fiber injection have special requirements for injection molding machines and molds? A. There are certainly requirements. Especially from the product design structure, as well as the injetion molding machine screw nozzle and mold structure injection molding process must consider the requirements of long fiber. Q. After long glass fiber reinforced, glass fiber can enter the surface of the plastic product during injection molding process, so that surface of the product become rough and floating fiber. How to make the surface of the material smoothly? A. During injection molding process need to ensure that the plastic particles are well plasticized and dispersed, also ensure that the dry of plastic particles have no moisture removal, mold temperature adjestment to the appropriate temperature, mold surface is polished in place.

PBT materials Polybutylene terephathalate (PBT) is a crystalline thermoplastic engineering plastic made by polymerizing dimethyl terephthalate (DMT) and 1,4 butanediol (1,4-Butanediol). Due to the growth of the -CH2- chain of PBT resin, the molecular chain is easy to flex, so the glass transfer temperature is lower than that of PET, and the crystallization speed increases. PBT can also be called thermoplastic polyester plastics, applicable to different processing industries, generally more or less will add additives, or blended with other plastics, with different proportions of additives, can be manufactured with different specifications of the product. Because PBT has heat resistance, weather resistance, chemical resistance, good electrical properties, low water absorption, good gloss, widely used in electronic and electrical appliances, automotive parts, machinery, household goods, etc.. PBT's downstream applications include the automotive, electronics/electrical appliance, and machinery industries. Datasheet for reference Application LGF & SGF Advantages of Long glass fiber reinforced materials Glass fiber reinforced plastic is based on the original pure plastic, adding glass fibers and other additives, so as to improve the scope of use of the material. Generally speaking, most of the glass fiber reinforced materials are used in the structural parts of the products, which is a kind of structural engineering materials, such as: PP, ABS, PA66, PA6, PC, POM, PPO, PET, PBT, PPS and so on. Advantages After glass fiber reinforcement, glass fiber is a high temperature resistant material, therefore, the heat-resistant temperature of reinforced plastics is much higher than before without glass fiber, especially nylon plastics. After glass fiber reinforcement, due to the addition of glass fiber, it restricts the mutual movement of the polymer chain of the plastic, therefore, the shrinkage of the reinforced plastic decreases a lot and the rigidity is greatly improved. After glass fiber reinforced, the reinforced plastic will not stress cracking, at the same time, the impact resistance of the plastic improves a lot. After the glass fiber reinforcement, the glass fiber is a high strength material, which also greatly improves the strength of the plastic, such as: tensile strength, compression strength, bending strength, improve a lot. After glass fiber reinforcement, due to the addition of glass fiber and other additives, the combustion performance of the reinforced plastics decreases a lot, most of the materials can not be ignited, it is a kind of flame-retardant material. Warehouse & Lab Customers & Us Catalog