Overview
Vacuum-formed PC sheets are manufactured by heating polycarbonate resin and shaping it under vacuum pressure onto molds. This process creates lightweight yet high-strength panels with precise dimensional stability. Polycarbonate's inherent properties make these sheets 250 times stronger than glass while maintaining 90% light transmission. Unlike injection-molded PC, vacuum-formed sheets allow for larger panel sizes and complex geometries at lower tooling costs. They dominate applications requiring both durability and design flexibility, such as industrial machine enclosures and architectural cladding.
Physical and Chemical Properties
These sheets exhibit exceptional impact resistance (IK10 rating achievable), with a service temperature range of -40°C to +120°C. Their thermal expansion coefficient of 65-70×10−6/°C requires consideration in fixed installations. Optical-grade variants transmit light comparably to glass (up to 92% transparency). Chemically, PC sheets resist dilute acids, alcohols, and oils but are attacked by strong alkalis and aromatic hydrocarbons. UV-stabilized versions maintain mechanical properties after prolonged outdoor exposure. The material's Rockwell M hardness typically ranges from 70-78, offering good scratch resistance when coated.
Main Applications
Industrial safety applications account for 45% of usage, including CNC machine guards and explosion-proof lighting covers. The automotive sector utilizes formed PC for instrument panels and headlight diffusers. In construction, they serve as vandal-resistant glazing for bus shelters and security windows. Retail displays benefit from the material's formability into curved signage and product showcases. Emerging applications include medical device housings (sterilizable at 134°C) and agricultural greenhouse panels with anti-fog coatings. Multi-wall vacuum-formed PC sheets provide thermal insulation for cold storage partitions.
Safety and Storage
While PC sheets are inherently flame-retardant (UL94 V-2 rating), smoke generation during fire requires proper ventilation design. Occupational exposure limits for PC dust during machining are 10mg/m³ (total particulate). Unprocessed sheets should be stored horizontally on flat racks to prevent warping. Protective film should remain installed until final application to prevent surface abrasion. For outdoor storage, cover stacks with UV-blocking tarpaulins. Avoid contact with alkaline cleaning agents which can cause stress cracking. Recycled content sheets may require verification of food-contact compliance for specific applications.
B2B Procurement Guide
Key specifications to request include: impact strength (ISO 6603-2 test results), light transmission percentage (ASTM D1003), and yellowing index after accelerated aging. For structural applications, ask for tensile modulus data (typically 2,300-2,500 MPa). Bulk orders (pallet quantities) typically offer 15-30% cost savings. Lead times vary from 2-6 weeks for custom colors/thicknesses. Verify supplier certifications like ISO 9001 and REACH compliance documentation. Sample testing should include forming trials if secondary processing is planned.
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