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A blend of polycarbonate (PC) and polybutylene terephthalate (PBT) blends or blends of polycarbonate (PC) and Polyterephthalate (PET) blends produced by our company, PC/PBT is a blend of PC and PBT, usually in the shape of a blend after blending. If we simply mix the two materials directly after injection, the effect will be very poor, and there will be stratification. PC / PBT has the comprehensive properties of PC and PBT, such as high toughness and geometric stability of PC, chemical stability, thermal stability and lubrication properties of PBT.
The advantage of PC is that the room temperature is rigid and tough, but the thermal deformation is serious under high temperature. The disadvantage is that the stress cracking and the viscosity are large; the advantage of PBT is that its rigidity is not affected by the temperature, and the deformation is small. The blending material, PC-PBT, has retained the advantages of both.
PC-PBT has high surface hardness, high rigidity and toughness, high resistance to high temperature, and high resistance to stress cracking. Its mechanical properties are between the two.
The significant properties of PC+PBT materials include:
High toughness (even in a low temperature environment)
Good chemical resistance
Stress cracking is not easy to occur
Good coating performance
Low hygroscopicity use
The application fields of the material are:
The application feature of automotive exterior parts is to replace steel with plastic and reduce vehicle weight. Automobile accessories include front and rear bumpers, hood, radiator grille, fender, car door handle, rear guide plate, body decoration strip, etc. In addition to the function of interior decoration, exterior decoration also requires high strength, high toughness, environmental resistance and impact resistance. Polyester (PBT) and polyester / polycarbonate alloy (PBT/PC), especially the elastomer toughened PBT/PC and PET/PC alloys are ideal materials for the manufacture of automotive exterior accessories, which are suitable for making automotive body panels, side panels, fenders, and door frames.
The automotive exterior materials not only have high weatherability, high heat resistance, but also have high surface gloss and high surface hardness, which can meet the requirements of the mechanical and weatherproof properties of the major host plants. The external decoration materials are mainly used in the outer triangular block, the column plate, the rearview mirror, the heat dissipation grille, the electroplating door handle, the plating ornament, the luggage bracket, the license plate and the hub cover, which have high appearance and weatherability.
PC + PBT is a kind of plastic alloy. It maintains the chemical resistance of crystalline PBT and its easy forming characteristics. It also has the toughness and dimensional stability of non-crystalline PC. Gear boxes, automobile bumpers and products requiring chemical and corrosion resistance, thermal stability, impact resistance and geometric stability. Its products are widely used in automotive bumpers, automotive handles, automotive interior parts, vacuum cleaner shell, electronic components, communication equipment, lighting equipment and so on. PC / PBT has the comprehensive properties of PC and PBT, such as high toughness and geometric stability of PC, chemical stability, thermal stability and lubrication properties of PBT.
Automotive Engineering
Electrical engineering / Electronics
• lighting technology
Characteristics of sports and leisure
Product color
- light milky white, opaque color range
Apart from natural and black, it also has a series of opaque standard colors. Special colors can also be made.
Appearance quality
- lustrous or glossy rigid
High tensile modulus: from 1800 MPa to 3900MPa according to different grades.
Impact and fracture resistance
Even at low temperatures, it has high toughness and high impact strength to resist stress cracking.
Resistance to heat resistance of various chemicals and solvents
Products of all grades have good heat resistance, dimensional accuracy and stability.
Good, obviously superior to semi crystalline thermoplastic plastics for chemical resistance.
Good electrical insulation especially for fuels, lubricants, solvents and cleaning agents.
High resistance machinability
Free flow
Fast curing and hygroscopicity
Significantly lower than semi crystalline thermoplastic
(PC+PBT) blends - impact modification
1. non enhanced grade
Injection molding grade, high flow performance, low temperature and high toughness applications: automotive bumper
Injection molding grade, low temperature and high toughness application: automotive bumper
Injection moulding grade, medium fluidity, high toughness at low temperatures, ideal coating performance applications: automotive body panels
Injection molding grades, low temperature, high toughness, ideal coating performance applications: automotive body panels
Injection molding grade, excellent toughness at low temperature, ideal coating properties.
Applications: automotive interior and exterior body panels, bumpers, electrical / electronic power tools
2. mineral filling grade
Injection molding grade, 10% mineral filled, low thermal expansion coefficient application area: Auto body panel
Injection molding grade, 20% mineral filled, low thermal expansion coefficient application area: Automotive external body panels
(PBT + PC) blends -- impact modification
1. non enhanced grade
Injection molding grade, excellent chemical resistance, high toughness at low temperatures, ideal coating performance applications: motorcycle body parts
(PC+PET) blends - impact modification
PC/PET alloy has good hardness and heat resistance, impact resistance, high strength, high gloss, high toughness (even in low temperature environment), good chemical resistance, stress cracking and good coating performance.
