TPCW1 Transparent Solar Backsheet

Innovative Material Composition Design

The TPCw1 backsheet features a unique dual-layer composite structure:

1. Weather-resistant layer using DuPont™ transparent Tedlar® film

• Special polymer formulation with precise thickness control (125±5μm)
• High-efficiency UV stabilizers for long-term weather resistance
• Specially treated surface with self-cleaning functionality
• Complies with ISO 13468 light transmittance testing standard

2. Bonding layer with independently developed fluorinated coating technology

• Special fluorocarbon resin system forming 3D cross-linked structure
• UV-resistant modifiers to enhance weather durability
• Initial peel strength ≥70N/cm for reliable encapsulation
• Validated by 1000-hour aging test at 85°C/85%RH

Excellent Optical and Environmental Performance

1. Optical characteristics

• Total light transmittance ≥91.5%, maximizing rear-side power gain
• Haze <2%, ensuring consistent module appearance
• Color difference ΔE<1.5, no discoloration over time
• Light transmittance retention >95% after 3000-hour UV aging

2. Environmental durability

• Passes 3000-hour damp heat test (85°C/85%RH)
• No abnormalities after 200 thermal cycles (-40°C~85°C)
• Maintains structural integrity after 50 freeze-thaw cycles
• No corrosion after 1000-hour salt spray test

Reliable Module Encapsulation Performance

1. Interface compatibility with EVA

• Passes 1000-hour compatibility test at 85°C/85%RH
• Interface bonding strength >60N/cm for long-term reliability
• Bubble area <0.5%, minimizing optical loss
• Yellowing index ΔYI<2, maintaining aesthetic appeal

2. Long-term operation assurance

• UV aging resistance >120kWh/m², exceeding industry standards
• Passes hot spot test at 150°C local high temperature
• Excellent anti-PID performance for high-efficiency modules
• Certified to IEC 62788-7-2 and other international standards

Strict Quality Control System

Each production batch undergoes

• Comprehensive raw material inspection
• Real-time monitoring of key production parameters
• 100% finished product appearance and optical performance inspection
• Regular sampling for accelerated aging tests
• Complete quality traceability records

Wide Range of Applications

Particularly suitable for

• Utility-scale bifacial power plants
• Commercial and industrial bifacial module projects
• BIPV building-integrated applications
• PV installations in high-reflectivity environments
• Special applications like agrivoltaics