Overview
Glass-filled PC is a composite material where polycarbonate (PC) resin is reinforced with glass fibers, typically ranging from 10% to 40% by weight. This combination leverages PC's inherent impact resistance and optical clarity (when unfilled) with the mechanical strength and thermal stability imparted by glass fibers. The material is widely adopted in industries requiring lightweight yet durable components. Initially developed to address the limitations of standard PC in high-stress environments, glass-filled PC offers superior creep resistance and reduced thermal expansion. It is commonly processed via injection molding or extrusion, making it versatile for complex geometries.
Physical and Chemical Properties
Glass-filled PC exhibits a density of 1.3-1.5 g/cm³, depending on the glass fiber content. Its tensile strength can exceed 100 MPa, significantly higher than unfilled PC. The glass fibers also improve stiffness, reducing deflection under load. Thermal properties include a heat deflection temperature (HDT) of up to 140°C at 1.82 MPa, making it suitable for high-temperature applications. Chemically, it retains PC's resistance to acids, oils, and alcohols but remains vulnerable to strong bases and certain solvents like acetone. The material's electrical insulation properties are maintained, though glass fibers can increase dielectric constant slightly.
Main Applications
In the automotive sector, glass-filled PC is used for housings, connectors, and under-the-hood components due to its vibration resistance and thermal stability. Electronics manufacturers employ it for laptop frames, power tool housings, and LED fixtures where rigidity and flame retardancy are critical. Industrial applications include gears, bearings, and conveyor components, where low wear and high dimensional accuracy are required. Consumer goods like appliance parts and sporting equipment also benefit from its durability and lightweight nature.
Safety and Storage
Glass-filled PC pellets or sheets should be stored in moisture-proof packaging to prevent hydrolysis, which can degrade mechanical properties. Processing temperatures should not exceed 300°C to avoid thermal decomposition and fume generation. Proper ventilation is essential during machining or melting. Workers handling glass-filled PC should use gloves and eye protection to avoid irritation from glass fibers. Dust control measures, such as local exhaust ventilation, are recommended during grinding or sanding operations.
B2B Procurement Guide
When procuring glass-filled PC, specify the glass fiber percentage (e.g., 20% or 30%), which directly influences mechanical properties. UV-stabilized grades are advisable for outdoor applications. Verify compliance with industry standards like UL 94 (flame retardancy) or FDA regulations for food-contact uses. Supplier audits should include testing for batch consistency in fiber distribution and mechanical performance. Bulk pricing often applies for orders above 1 ton, with lead times varying based on customization (e.g., color additives or special additives).
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