PC/PBT (Polycarbonate/Polybutylene Terephthalate) alloy is a thermoplastic blend that combines the beneficial properties of both polycarbonate (PC) and polybutylene terephthalate (PBT). This alloy offers a unique combination of high impact resistance, dimensional stability, chemical resistance, and excellent processing characteristics. PC provides toughness and heat resistance, while PBT contributes to chemical resistance and ease of processing, making PC/PBT alloy a versatile material for various demanding applications.
Applications of PC/PBT Alloy
Automotive Industry: Used for exterior parts such as bumpers, grilles, and mirror housings, as well as interior components like instrument panels and door handles, due to its excellent impact resistance and dimensional stability.
Consumer Electronics: Ideal for housings of laptops, smartphones, and other electronic devices, providing durability and a high-quality surface finish.
Electrical and Electronic Components: Employed in connectors, switches, and enclosures that require good electrical insulation properties and resistance to harsh environmental conditions.
Industrial Applications: Used in various industrial components that demand high mechanical strength, resistance to chemicals, and reliable performance under stress.
Appliances: Applied in parts of household appliances like washing machines and refrigerators, benefiting from its toughness and heat resistance.
Injection Molding Guidance for PC/PBT Alloy
Drying: PC/PBT alloy should be thoroughly dried before processing to prevent moisture-related defects. Typical drying conditions are 100-120°C (212-248°F) for 4-6 hours.
Mold Temperature: Optimal mold temperatures range from 60-100°C (140-212°F). Higher mold temperatures can improve surface finish and reduce internal stresses.
Injection Pressure: Moderate to high injection pressures are recommended to ensure proper filling and minimize the risk of defects.
Injection Speed: Medium to high injection speeds help in achieving uniform filling and avoiding flow marks and weld lines.
Cooling Time: Adequate cooling time is crucial to prevent warping and ensure dimensional accuracy. Cooling times will vary depending on the part's thickness and mold design.
Processing Temperatures: Barrel temperatures typically range from 240-280°C (464-536°F). It is important to avoid excessive residence times at high temperatures to prevent thermal degradation。
Ventilation: Proper mold ventilation is necessary to avoid gas trapping, which can cause burn marks and incomplete filling.
