Polycarbonate Sheet Types and Structural Formats
Polycarbonate Sheets are available in solid, hollow, multi-layer, corrugated, and textured formats. Each structure provides a different balance of impact resistance, light transmission, insulation, weight, and application suitability.
Solid Polycarbonate Sheets
Solid polycarbonate sheets range from 2 mm to 10 mm thick. They offer glass-like clarity, light transmission of approximately 85% to 92%, and extremely high impact resistance. These properties make them suitable for:
- Security barriers
- Protective windows
- Machine guards
- Safety glazing
- Riot shields
Hollow and Multi-Layer Sheets
Hollow and multi-layer polycarbonate sheets are available in 4 mm to 20 mm thicknesses. Their cellular air pockets reduce weight while providing excellent thermal insulation and soundproofing performance. Common applications include:
- Greenhouses
- Awnings
- Sunshades
- Roofing structures
Corrugated PC Roofing Sheets
Corrugated PC tiles typically range from 1.0 mm to 1.5 mm thick. Their wave-shaped profile improves rigidity while maintaining a lightweight, waterproof, and heat-insulating structure. They are used for:
- Roof coverings
- Skylights
- Lightweight roofing systems
Textured and Particle Panels
Textured and particle polycarbonate panels provide specialised patterned surfaces for projects requiring controlled light diffusion, a distinctive appearance, or increased visual privacy. Availability depends on the required design and production specification.
Polycarbonate Sheet Technical Specifications
Material choice affects clarity, impact strength, outdoor life, and structural stability. I use 100% virgin polycarbonate resin from SABIC and Covestro for consistent sheet quality and reliable production performance. Recycled content is not part of this product specification.
Key Material Features
| Feature | Specification |
|---|---|
| Raw material | 100% virgin polycarbonate resin |
| Resin sources | SABIC and Covestro |
| UV protection | Co-extruded UV layer |
| Outdoor service life | Typically 10–15 years under normal outdoor conditions |
| Recyclability | 100% recyclable |
| Quality standards | ISO 9001, CE, ISO 11963, and GB/T 44570 |
The UV co-extrusion layer helps protect UV-protected polycarbonate sheets from outdoor weathering, yellowing, embrittlement, and surface degradation. The UV-treated side should face the primary sunlight exposure during installation.
Light Transmittance and Tint
Polycarbonate sheet light transmittance generally ranges from 75% to 92%, depending on the sheet structure, thickness, colour, and surface treatment.
| Sheet type | Light transmittance | Thermal performance |
|---|---|---|
| Hollow or multi-layer | 75%–90% | Excellent insulation |
| Solid polycarbonate | 85%–92% | Moderate insulation |
| Corrugated PC tile | 80%–88% | Excellent insulation |
Higher light transmission improves daylight access, but it does not directly indicate lower solar heat gain. For roofs, walls, greenhouses, and enclosed spaces, I assess light transmission together with the sheet structure, colour, thickness, ventilation, and insulation requirements. Available colour and surface options can be selected for daylight control, privacy, or heat management.
Thermal Insulation
Multiwall polycarbonate sheets use cellular air pockets to reduce heat transfer. This makes them suitable for greenhouses, awnings, skylights, and other enclosed structures where temperature control matters.
Solid sheets provide strong impact protection but offer less thermal insulation than hollow and multi-layer structures. K-value and U-value data should be confirmed for the selected specification and project design, especially for climate-controlled buildings and commercial greenhouse systems.
Fire Performance
Fire performance depends on the specific sheet grade, thickness, structure, and installation environment. I recommend confirming the required fire classification and test documentation before ordering for a regulated building or industrial project. The applicable requirements should match local building codes and the installation conditions.
Polycarbonate Sheets vs. Acrylic vs. Glass
Material choice affects safety, weight, insulation, and installation details. Polycarbonate Sheets are the practical choice where impact protection, lower structural weight, or safer glazing matters most.
| Factor | Polycarbonate Sheets | Acrylic (PMMA) | Tempered Glass |
|---|---|---|---|
| Impact resistance | Extremely high | Higher than standard glass | Strong but can break under severe impact |
| Break behavior | Shatter-resistant | Can crack or fracture | Breaks into small pieces |
| Weight | Lightweight | Lightweight | Heavy |
| Light transmission | Up to 92% for solid sheets | High optical clarity | High optical clarity |
| Thermal insulation | Excellent in multiwall structures | Limited compared with multiwall PC | Limited in single-pane form |
| Surface hardness | Can scratch without hardcoat | Better scratch resistance | Strong scratch resistance |
| Thermal movement | Requires expansion allowance | Requires expansion allowance | Lower expansion than plastics |
Impact Protection and Safety
Solid polycarbonate sheets provide substantially greater impact resistance than glass and acrylic. They are suitable for security glazing, high-impact machine guards, protective screens, acoustic barriers, and safety windows where broken fragments are a concern.
Acrylic offers good clarity and lower weight, but it is less suitable for severe-impact environments. Tempered glass provides a hard, clear surface, yet its weight and breakage behavior may limit its use in protective applications.
Weight and Structural Load
Polycarbonate and acrylic are much lighter than glass. This can reduce frame loading, simplify handling, and support faster installation on canopies, roofing, partitions, and skylights.
For large overhead panels, lightweight Polycarbonate Sheets can help reduce demands on supporting structures while maintaining useful light transmission.
Clarity and Insulation
Clear solid polycarbonate delivers glass-like visibility, with light transmission reaching approximately 92% depending on thickness and finish. Acrylic and tempered glass can also provide high clarity, but multiwall polycarbonate offers a key advantage in enclosed spaces.
Its internal air channels improve thermal insulation, helping reduce heat transfer through greenhouse glazing panels, rooflights, and other covered structures. Solid acrylic and single glass panels generally provide less insulation than multiwall polycarbonate.
Expansion and Surface Care
All plastic glazing materials expand and contract with temperature changes. Polycarbonate requires sufficient movement allowance in frames and fastener holes to prevent stress cracking, buckling, or restricted movement. Glass has lower thermal expansion, but needs heavier framing and careful edge support.
Polycarbonate surfaces can scratch more easily than glass. For high-wear areas, hardcoat-treated panels improve surface durability while keeping the material’s impact resistance.
Choosing the Right Material
Choose Polycarbonate Sheets when the project needs:
- High-impact protection and shatter-resistant safety glazing
- Lower weight than glass for roofing or overhead installation
- Thermal insulation from multiwall or hollow structures
- High light transmission with safer panel behavior
- Flexible fabrication for practical site installation
Acrylic suits clear, lightweight applications with moderate impact exposure. Tempered glass remains suitable where surface hardness and traditional glazing appearance are the main priorities.
Polycarbonate Sheet Applications and Thickness Selection
I select polycarbonate sheets by matching the structure, thickness, light transmission, and insulation level to the project.
| Application | Recommended sheet | Main benefits |
|---|---|---|
| Greenhouse glazing | 4–8 mm twin-wall or multiwall sheets | Thermal insulation, lower weight, and diffused light |
| Roofing, canopies, and skylights | 8–16 mm multiwall sheets or 1.0–1.5 mm corrugated PC roofing | Lightweight coverage, weather resistance, and daylight access |
| Security glazing and machine guards | 6–10 mm solid polycarbonate sheets | Very high impact resistance and safer protection |
Greenhouse Glazing Panels
For agricultural structures, 4–8 mm multiwall polycarbonate sheets provide a practical balance between insulation, weight, and light transmission. Diffused light can help reduce direct glare and foliage burning while supporting heat retention overnight.
Roofing, Canopies, and Skylights
For architectural roofing and skylights, I consider:
- Wind and snow loads
- Roof slope and support spacing
- Sheet thickness and structure
- UV protection and weather exposure
- Leak-resistant sealing and compatible profiles
Multiwall polycarbonate sheets suit insulated roofs and canopies. Corrugated PC roofing sheets are suitable where a lightweight, weather-resistant roof covering is required.
Security Glazing and Machine Guards
For industrial safety barriers, machine guards, acoustic barriers, and security windows, 6–10 mm solid polycarbonate sheets provide high-impact protection. Solid panels do not shatter like conventional glass, which helps reduce dangerous fragments during impact.
The final polycarbonate sheet thickness should match the required impact resistance, span, support system, color, light transmission, and thermal insulation performance.
Polycarbonate Sheet Fabrication and Installation
I recommend confirming the required thickness, dimensions, colour, and surface treatment before production. Bonai supports custom polycarbonate sheet sizes and technical guidance for project-specific requirements.
During installation, handle sheets carefully to protect their clarity, impact performance, and UV co-extrusion layer. Use compatible framing, joining, and sealing systems suited to the selected solid, hollow, multi-layer, or corrugated structure.
For outdoor applications, install the UV-protected side toward the main sunlight exposure. Correct installation helps maintain the sheet’s weather resistance and supports its expected 10 to 15-year outdoor service life under normal conditions.
Polycarbonate Sheet Maintenance
I recommend cleaning polycarbonate sheets with warm water, mild soap, and a soft microfiber cloth. This removes dirt and residue while helping preserve the sheet’s surface finish and UV protection.
Avoid ammonia, benzene, acetone, harsh solvents, and abrasive pads. These materials can damage the finish, increase scratching, and reduce optical clarity.
During routine maintenance, inspect the seals, H-profile joiners, U-cap profiles, fasteners, anti-dust tape, and drainage paths. Repair damaged components promptly to help prevent moisture, dirt, or insects from entering hollow and multiwall channels.
Sourcing and Customizing Polycarbonate Sheets from Bonai
At Bonai, we manufacture Polycarbonate Sheets using 100% virgin raw materials sourced from SABIC and Covestro. This supports consistent clarity, impact performance, and long-term outdoor use.
Our quality system and products comply with:
| Quality standard | Application |
|---|---|
| ISO 9001 | Quality management |
| CE | Product conformity |
| ISO 11963 | Polycarbonate sheet requirements |
| GB/T 44570 | Technical product standard |
Custom Polycarbonate Sheet Options
We support project-based and OEM requirements with:
- Custom thickness, length, and width
- Clear, bronze, opal, milk white, and other color options
- Cut-to-size plastic sheets
- Anti-fog coatings for greenhouses and humid areas
- Hardcoat treatments for improved scratch resistance
- UV-protected surfaces for roofing, glazing, and exterior structures
Anti-fog polycarbonate coatings help maintain visibility in greenhouse applications. Hardcoat polycarbonate is suitable for machine guards, partitions, and other installations where surface wear is a concern.
Our weather-resistant thermoplastic sheets are available for:
- Roofing and skylights
- Greenhouse glazing
- Architectural canopies
- Industrial protection
- Exterior partitions and safety barriers
We provide direct factory sourcing, B2B OEM and reseller support, technical assistance, and delivery support for customers in different markets. Each order can be matched to its required Polycarbonate Sheet thickness, structure, color, surface treatment, and installation use.
Polycarbonate Sheets FAQs
Does Polycarbonate Yellow or Become Brittle?
UV-protected polycarbonate sheets are designed to resist yellowing, embrittlement, and outdoor degradation. With a UV co-extruded layer, the expected outdoor service life is typically 10 to 15 years under normal conditions.
| Protection | Main benefit |
|---|---|
| UV co-extrusion | Helps protect against sunlight damage |
| Virgin resin | Supports clarity, impact strength, and material stability |
| Correct installation | Helps preserve long-term outdoor performance |
Which Side Faces the Sun?
Install the UV-treated side toward the exterior or primary sunlight exposure. Protective film markings normally identify this side. Check the product marking before removing the film and follow the supplier’s installation instructions.
Can Polycarbonate Sheets Be Cold-Bent?
Some solid and multiwall polycarbonate panels can be cold-bent, but the permitted curve depends on the sheet structure, thickness, and manufacturer’s requirements. I recommend confirming the minimum bending radius before installation. Do not force the sheet into a tight curve, as this can create stress and affect its service life.
How Do Multiwall Sheets Reduce Energy Use?
Multiwall polycarbonate sheets contain trapped air pockets between their layers. These pockets act as thermal barriers and improve insulation compared with single-layer glazing. This can help reduce heating and cooling loads in greenhouses, skylights, and enclosed structures.
What Thickness Is Best?
The correct polycarbonate sheet thickness depends on impact, insulation, light transmission, span, and structural requirements.
| Application | Typical selection |
|---|---|
| Greenhouse glazing | 4–6 mm; 4–8 mm twin-wall or multiwall panels may be used |
| Canopies and skylights | 8–16 mm multiwall sheets or 1.0–1.5 mm corrugated PC roofing |
| Machine guards and security glazing | 6–10 mm solid polycarbonate sheets |
| General awnings and sunshades | Hollow or multiwall sheets selected according to span and support spacing |
For high-impact protection, I choose solid polycarbonate sheets. For thermal insulation and lower weight, I choose hollow or multiwall panels. For lightweight roof coverings and skylights, corrugated PC roofing sheets are usually more suitable.