Overview
PC sheet, or polycarbonate sheet, is a high-performance thermoplastic polymer prized for its exceptional impact resistance—up to 250 times stronger than glass. It combines optical clarity (up to 90% light transmission) with lightweight properties, making it a preferred material for safety glazing and transparent barriers. Developed in the 1950s, PC sheets have evolved to include UV-resistant and anti-scratch variants. Their versatility spans industries from construction (skylights, noise barriers) to medical devices (sterilizable equipment), owing to their biocompatibility and ease of thermoforming.
Physical and Chemical Properties
PC sheets exhibit a unique balance of strength and flexibility, with a tensile strength of 55-75 MPa. They maintain dimensional stability between -40°C to +120°C, outperforming acrylic in thermal resistance. The material’s refractive index (1.584) makes it suitable for optical applications. Chemically, PC resists dilute acids, alcohols, and oils but is susceptible to strong alkalis and aromatic hydrocarbons. Its hydrolytic stability requires controlled humidity during processing to prevent molecular weight degradation. Grades with additives (e.g., glass fiber reinforcement) enhance specific properties like stiffness or flame retardancy (UL94 V-0 rating achievable).
Main Applications
In construction, multiwall PC sheets are used for energy-efficient roofing and soundproof partitions. Their 90% light transmission with UV filtering makes them ideal for greenhouses and stadium covers. Automotive applications include headlamp lenses and bullet-resistant police vehicle windows. The electronics industry utilizes PC sheets for LED light guides and touchscreen overlays due to their dielectric properties. Medical-grade sheets meet ISO 10993 standards for surgical instruments and IV connectors. Emerging uses include 3D printing substrates and anti-microbial surfaces for healthcare environments.
Safety and Storage
While PC is inherently flame-retardant (self-extinguishing), processing above 300°C may release bisphenol A vapors—adequate ventilation is critical. Sheets should be stored horizontally on flat pallets to prevent warping, with protective film retained until installation to avoid surface scratches. UV-stabilized grades are essential for outdoor use to prevent yellowing; accelerated weathering tests (e.g., QUV 2000 hours) verify performance. For food-contact applications, ensure compliance with FDA 21 CFR or EU 10/2011 regulations. Always use carbide-tipped tools for cutting to prevent chipping.
B2B Procurement Guide
Key specifications to verify include thickness tolerance (±5% is industry standard), light transmission percentage (measured via ASTM D1003), and impact resistance (tested per ISO 6603-2). For architectural projects, request samples with mock-up installations to assess thermal expansion (0.065 mm/m°C typical). Supplier audits should confirm ISO 9001 certification and batch traceability. Bulk orders (over 1,000 sqm) often qualify for 10-15% discounts. Consider Just-In-Time delivery for large sheets to minimize warehouse handling damage. Preferred payment terms in the industry are 30% advance with 70% against BL copy.
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