Overview
Heat-resistant ABS is a modified version of standard ABS, engineered to withstand higher temperatures without losing structural integrity. Through copolymerization or additives like stabilizers and reinforcing agents, its heat deflection temperature (HDT) can reach 100-120°C, compared to 85-95°C for conventional ABS. This thermoplastic combines acrylonitrile, butadiene, and styrene, inheriting toughness, rigidity, and processability while addressing thermal limitations. It is widely used in industries where components face sustained heat exposure, such as under-hood automotive parts or electronics enclosures.
Physical and Chemical Properties
Heat-resistant ABS exhibits a balanced profile of mechanical and thermal properties. Its HDT ranges from 100°C to 120°C under load (ASTM D648), with tensile strength of 40-50 MPa and elongation at break of 10-20%. The material maintains stability up to 80-90°C in continuous use. Chemically, it resists acids, alkalis, and oils but degrades under prolonged UV exposure unless stabilized. Additives like antioxidants or glass fibers further enhance performance. Electrical insulation properties (dielectric strength ~15 kV/mm) make it suitable for electronic applications.
Main Applications
The automotive sector accounts for over 40% of heat-resistant ABS usage, particularly in dashboards, vent systems, and radiator grilles, where temperatures exceed standard ABS limits. In electronics, it houses power tools, LED fixtures, and printer components. Industrial applications include conveyor system parts, HVAC components, and housings for machinery exposed to moderate heat. Medical device manufacturers utilize sterilizable grades for equipment handles. Custom-colored grades are common in consumer appliances like coffee makers and hairdryers.
Safety and Storage
While heat-resistant ABS is generally safe, processing at temperatures above 250°C may release fumes containing styrene and acrylonitrile, requiring fume extraction. Finished products are non-toxic under normal use but should avoid direct flame contact. Storage recommendations include keeping pellets in moisture-proof packaging at <30°C to prevent degradation. Prolonged UV exposure can cause yellowing; UV-stabilized grades are advised for outdoor use. Recycling codes (e.g., #7) vary by formulation.
B2B Procurement Guide
When sourcing heat-resistant ABS, specify key parameters: HDT (e.g., 110°C at 1.82 MPa), flame-retardant requirements (UL94 ratings), and color stability. Verify regulatory compliance (REACH, RoHS) for target markets. Suppliers typically offer compounded grades with additives like glass fiber (10-30%) for enhanced strength. MOQs range from 500 kg to 1 ton for standard grades, with lead times of 2-4 weeks. Sample testing for thermal cycling and impact resistance is recommended before bulk orders. Prices fluctuate with styrene monomer market trends.
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