Overview
High temperature resistant PC engineering plastic is a modified polycarbonate designed to retain its mechanical and electrical properties under elevated temperatures, typically up to 140°C. Unlike standard PC, it incorporates additives or copolymer structures to enhance thermal stability without sacrificing its inherent clarity or impact resistance. This material is favored in industries where components face prolonged heat exposure, such as automotive lighting, electrical connectors, and industrial machinery. Its balance of durability and processability makes it a versatile alternative to metals or thermosetting plastics.
Physical and Chemical Properties
The material maintains a tensile strength of 55–70 MPa even at high temperatures, with a glass transition temperature (Tg) often exceeding 150°C for specialized grades. Its thermal expansion coefficient is low (65–70 × 10−6/°C), ensuring dimensional stability in fluctuating environments. Chemically, it resists acids, oils, and alcohols but may degrade under prolonged exposure to strong bases or aromatic solvents. UV-stabilized variants are available for outdoor applications. The flame-retardant grades meet UL94 V-0 standards, a critical feature for electronics and automotive compliance.
Main Applications
In automotive systems, this PC is used for headlight lenses, sensor housings, and under-the-hood components due to its heat resistance and lightweight properties. The electronics industry employs it in LED diffusers, power tool housings, and circuit breaker enclosures. Industrial applications include sight glasses for high-temperature equipment and conveyor components. Medical-grade variants serve in sterilizable devices. Its optical clarity also makes it suitable for transparent shields or panels requiring heat resistance.
Safety and Storage
While PC is generally non-toxic, processing at high temperatures may release trace bisphenol A (BPA), necessitating proper ventilation. Pellets should be dried at 120°C for 3–4 hours before injection molding to prevent hydrolysis degradation. Storage requires moisture-proof packaging in cool, dark conditions to prevent UV-induced yellowing. Bulk bags should be stacked no more than five layers high to avoid compaction. Shelf life is typically 12 months under optimal conditions.
B2B Procurement Guide
Buyers should specify requirements such as continuous use temperature (CUT), UL certification needs, and color stability thresholds. Technical datasheets must include heat deflection temperature (HDT) at 1.82 MPa load and melt flow rate (MFR) data. Suppliers in Asia (e.g., China, South Korea) often provide cost-competitive grades, while European manufacturers may offer higher-performance variants. MOQs commonly start at 500 kg, with bulk discounts available. Always request material samples for pre-production testing, especially for critical applications.
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