Polycarbonate Sheet[2]

Updated: 2026-09-12

Overview

Polycarbonate Sheet is an engineering thermoplastic derived from bisphenol A (BPA) and phosgene. It combines glass-like clarity with exceptional durability, making it ideal for applications requiring transparency and impact resistance. Its molecular structure features carbonate groups linked by aromatic rings, contributing to its high-performance characteristics. First commercialized in the 1950s, polycarbonate sheets have evolved with advanced UV-resistant coatings and multiwall designs for enhanced insulation. Unlike acrylic sheets, they exhibit superior toughness, withstanding extreme weather conditions and vandalism.

Physical and Chemical Properties

Polycarbonate sheets boast a unique balance of properties. They transmit up to 90% of visible light (similar to glass) while offering 250 times the impact resistance. The material maintains dimensional stability between -40°C and 120°C, with a thermal conductivity of 0.19 W/m·K. Chemically, polycarbonate resists dilute acids, oils, and alcohols but may degrade in strong alkalis or aromatic hydrocarbons. UV-resistant variants incorporate stabilizers to prevent yellowing, extending outdoor service life to 10-15 years. The sheets typically exhibit Rockwell M70 hardness and a refractive index of 1.584.

Main Applications

In construction, polycarbonate sheets replace glass in skylights, canopy roofs, and noise barriers due to their safety and lightweight (half the weight of glass). Multiwall sheets provide thermal insulation for greenhouses and stadium enclosures. The automotive industry uses them for headlamp lenses, sunroofs, and bullet-resistant windows. Industrial applications include machine guards, cleanroom partitions, and LED light diffusers. Recent innovations include anti-fog coatings for refrigeration displays and EMI-shielding versions for electronic enclosures.

Safety and Storage

While polycarbonate sheets are inherently flame retardant (UL94 V-0/V-2 rated), they should not be used in direct contact with open flames. Processing generates minimal fumes, but adequate ventilation is recommended during laser cutting or thermoforming. Sheets should be stored horizontally on flat surfaces to prevent warping. Protective films prevent surface scratches during handling. Avoid stacking different colors/thicknesses to prevent stress marks. For long-term storage, maintain relative humidity below 60% to prevent hydrolysis degradation.

B2B Procurement Guide

Key specifications to evaluate include thickness tolerance (±5-10%), light transmission percentage, and impact strength (measured by Izod or Charpy tests). For outdoor use, confirm UV protection is on both sides (co-extruded preferred over surface-coated). Bulk buyers should request material certifications like ISO 9001, ROHS compliance, and specific fire ratings (e.g., DIN 4102 B1). Lead times vary by customization: standard sheets (1-2 weeks), colored/patterned (3-4 weeks). Consider MOQs (typically 100-500 kg) and pallet loading configurations to optimize logistics costs.