Virgin Grade PBT Injection Molding Long Glass Fiber Filling Composite For Electronic Appliances

Product information

Scientific Name: Polybutylene terephthalate (PBT), belonging to the polyester series, is formed by condensation of 1.4-pbt Butylene glycol (1.4-Butylene glycol) with terephthalic acid (PTA) or terephthalate (DMT), and is made by mixing process into a milky white semi-transparent to opaque, crystalline thermoplastic polyester resin. Together with PET, it is called thermoplastic polyester, or saturated polyester.

PBT crystallization speed is fast, the most suitable processing method for injection molding, other methods and extrusion, blow molding, coating, and various secondary processing molding.

Product feature

(1) Excellent mechanical properties, high strength, and fatigue resistance, good dimensional stability, and small creep. Under high-temperature conditions, the performance changes less.

(2) Easy to flame retardant, has a good affinity with flame retardant, easy to develop additive and reactive flame retardant grade, can meet the requirements of UL94 V-0. It has been widely used in the electronic and electrical industries.

(3) Heat resistance, aging resistance, organic solvent resistance. After the enhancement, the UL temperature index is maintained in the range of 120℃ to 140℃, and all have good outdoor long-term aging.

(4) Good processing performance. Easy secondary processing and molding processing, with the help of ordinary equipment, can be extruded molding or injection molding; With fast crystallization speed and good fluidity, mold temperature is relatively low

PBT is one of the toughest engineering thermoplastic materials, it is a semi-crystalline material, has very good chemical stability, mechanical strength, electrical insulation characteristics and thermal stability. These materials have excellent stability under a wide range of environmental conditions.

PBT has very weak hygroscopic properties. The tensile strength of the non-enhanced PBT is 50MPa, and the tensile strength of the glass additive is 170MPa. Too much glass additive will cause the material to become brittle. PBT; Crystallization is rapid and will result in bending due to uneven cooling.

For materials with glass additives, the shrinkage rate in the direction of the process can be reduced, but the shrinkage rate in the direction perpendicular to the process is basically no different from that of ordinary materials. The shrinkage rate of general materials is between 1.5% and 2.8%. Materials containing 30% glass additive shrink between 0.3% and 1.6%.

Melting point (225℃) and high-temperature deformation temperature are lower than PET material. The softening temperature of Vica is about 170℃. The glass trasitio temperature ranges from 22℃ to 43℃. Due to the high crystallization rate of PBT, its viscosity is very low, and the cycle time of plastic parts processing is generally low.

Product application

1. Electronic appliances

No fuse breaker, electromagnetic switch, return transformer, household appliance handle, connector, etc. PBT usually adds 30% glass fiber mixed as a connector, PBT is widely used because of its mechanical properties, solvent resistance, good formability, and low price.

2. Cooling fan

Glass fiber reinforced PBT is mainly used in the heat dissipation fan, the heat dissipation fan is placed in the machine for a long time to help heat dissipation, the physical properties of plastic requirements have heat resistance, flame resistance, insulation, and mechanical strength, PBT is usually in the form of fiber 30% applied as the heat dissipation fan outside the frame and the fan blade coil shaft.

3. Electrical components

Glass fiber reinforced PBT is also used as a transformer, and relay in the coil shaft, generally PBT plus fiber 30% injection forming. The required physical properties of the coil shaft include insulation, heat resistance, tin resistance, fluidity, strength, etc. The applicable materials include glass fiber-reinforced PBT, glass fiber-reinforced PA6, and glass fiber-reinforced PA66.

4. Automotive

a. external parts: mainly car bumper (PC/PBT), door handle, corner lesson, engine heat hole cover, window motor housing, fender, wire shield, wheel cover, car transmission gearbox, etc.;

b. Internal components: mainly include endoscope brace, wiper bracket, and control system valve;

c. automotive electrical parts: automotive ignition coil and various electrical connectors, etc.

At the same time, it can also be used in the charging gun housing of new energy vehicles.

5. Mechanical equipment

PBT material is also widely used in video tape recorder belt drive shafts, computer covers, mercury lampshades, iron covers, baking machine parts, and a large number of gears, cams, buttons, electronic watch housing, camera parts (heat resistant, flame retardant requirements)

Typical application scope:

Household appliances (food processing blades, vacuum cleaner components, electric fans, hair dryer housing, coffee utensils, etc.), electrical components (switches, electric housing, fuse boxes, computer keyboard keys, etc.), automotive industry (radiator grates, body panels, wheel covers, door and window components, etc.).

Product details

About us

Xiamen LFT composite Plastic Co., Ltd. is a brand-name company that focuses on LFT&LFRT. Long Glass Fiber Series (LGF) & Long Carbon Fiber Series (LCF). The company's thermoplastic LFT can be used for LFT-G injection molding and extrusion, and can also be used for LFT-G molding. It can be produced according to customer requirements: 5~25mm in length. 

The company's long-fiber continuous infiltration reinforced thermoplastic has passed ISO9001 & 16949 system certification, and the products have obtained lots of national trademarks and patents.