Polycarbonate sheets are rigid plastic panels known for high impact resistance, clarity, and light weight.
Polycarbonate sheets are rigid thermoplastic panels prized for their remarkable toughness. They combine transparency similar to glass with an impact resistance that glass cannot match, all at a fraction of the weight. This combination makes them the default choice for a wide range of glazing, protective, and construction applications where safety and durability are non-negotiable.
Defining Polycarbonate Sheet Material
A polycarbonate sheet is a flat form of polycarbonate plastic, a thermoplastic polymer known for its strength and optical clarity. The material’s formal specifications are defined under standards like BS EN ISO 11963:2019, “Plastics. Polycarbonate sheets. Types, dimensions and characteristics,” and ASTM D3935 for flat sheets.
Key Properties and Performance
Polycarbonate’s engineered performance comes from its unique molecular structure. It offers a density of 1.20 g/cm³ and tensile strength ranging from 60 to 70 MPa. Clear grades transmit 88% to 90% of visible light, while a high heat deflection temperature (around 130 to 140 °C) lets it withstand significant heat.
- Impact Resistance: Very high, with Izod impact values of 600 to 800 J/m.
- Water Absorption: Low at only 0.15%.
- Refractive Index: Approximately 1.586.
- Service Temperature: Generally from −40°C to +120°C.
- Flammability: Self-extinguishing, with UL94 V-2 standard and V-0 grades available.
Common Sizes and Thicknesses
Standard flat sheets are commonly available in a 48″ × 96″ size, with other stock options including 48″ × 120″ and 60″ × 96″. Thickness ranges vary by product line; one manufacturer specifies extruded sheets from.030 to.787 inch, while other sources list ranges from 0.020″ to 1.000″.
| Sheet Type | Common Thickness | Typical Use |
|---|---|---|
| Thin film/sheet | 0.020″ – 0.060″ | Machine guards, overlays |
| Standard flat sheet | 0.060″ – 0.500″ | Windows, skylights, signage |
| Thick plate | 0.500″ – 1.5″ | Security glazing, sound barriers |
| Multiwall sheet | 4 mm – 16 mm | Greenhouses, roofing panels |
| Extended range | 0.7 mm – 15 mm | Varied industrial uses |
Handling, Fabriction, and Outdoor Use
The material’s performance depends on how it is installed. Mechanical fastening and structural adhesives are recommended for joining; solvent welding should be avoided because it risks stress cracking.
For outdoor applications, UV-stabilized grades are essential; these versions absorb UV radiation at 380 nm and below, preventing yellowing and brittleness. Chemical compatibility is another key factor: polycarbonate resists acids, salts, and alcohols well, but is attacked by alkalis, ketones, esters, and aromatic solvents. It is not suitable for chemical-tank service or similar continuous chemical exposure.
Common applications for polycarbonate sheets span construction glazing, machine guards, safety shields, and interior design. The material’s ability to be easily thermoformed and machined extends its utility across many projects. If you are ready to start a project, exploring tested options in the 8×4 polycarbonate sheet roundup helps narrow the best choices for your specific needs.
Regarding specifications, the U.S. federal A-A-59502 standard for polycarbonate sheets outlines required property values, ensuring consistency across manufacturers. The current BS EN ISO 11963:2019 standard also governs types and dimensions for these panels.
You can find flat sheets with abrasion-resistant coatings for high-traffic areas and fire-rated grades for specialized applications. Available finishes include clear, gray, bronze, and opal, along with UV-stabilized and fire-rated options.
References & Sources
- Interstate Plastics. “Polycarbonate Sheet Material Specifications” Provides property values, sizes, and fabrication guidance.
- BSI Group. “BS EN ISO 11963:2019 — Plastics. Polycarbonate Sheets.” Current standard for types, dimensions, and characteristics.