EVA Material Overview and Application in Photovoltaic Modules

EVA Material Overview and Application in Photovoltaic Modules

What is EVA Material?

EVA (Ethylene-Vinyl Acetate) is a copolymer produced from ethylene and vinyl acetate monomers. It features reduced crystallinity, enhanced flexibility, impact resistance, filler compatibility, and heat-sealing performance.

EVA Material Characteristics:

1. Flexibility: Excellent flexibility and elasticity.

2. Impact Resistance: Superior impact resistance.

3. Transparency: High transparency ensures good optical properties.

4. Aging Resistance: UV and weather resistance for long-term durability.

5. Heat-Sealing: Easy to heat seal, widely used in packaging.

What is EVA Photovoltaic Encapsulation Film? EVA photovoltaic encapsulation film is a cross-linkable copolymer film used for encapsulating and protecting solar cells in photovoltaic modules.

Application of EVA Photovoltaic Encapsulation Film: EVA film is primarily used in solar module encapsulation to protect cells from environmental factors like moisture, dust, and mechanical impact. It is laminated on both sides of the solar cells during the vacuum lamination process.

Film Structure in Modules: EVA film is positioned above and below the solar cells, providing encapsulation and protection.

EVA Film Characteristics:

1. Durability: Weather, high temperature, humidity, and UV resistance.

2. Adhesion: Excellent adhesion to glass, metal, PET, and TPT.

3. Optical Performance: High light absorption rate and transparency.

4. High Cross-Linking Rate: Ensures reliable encapsulation.

5. Encapsulation Performance: Comprehensive protection enhancing module durability.

Measures to Prevent EVA Film Shrinkage:

1. Stress Relief Devices: Eliminate residual stress from stretching or production.

2. Low-Temperature Extrusion: Ensure materials are fully mixed and plasticized, reducing shrinkage.

3. Optimized Production Process: Precise control of temperature and pressure to minimize shrinkage.

Features and Advantages of GWELL EVA Photovoltaic Encapsulation Film Equipment:

1. High Output: Dual or triple extrusion for increased efficiency, with line speeds up to 2x13m/min.

2. Automation: Equipped with automatic winding and thickness measurement for quality assurance.

3. Intelligent Control: High-precision intelligent control system ensures stability and efficiency, with integrated thickness measurement and defect detection for quick data analysis.

4. Energy-Saving Design: Far-infrared tempering process, precise temperature control, and insulation materials for energy efficiency.

5. Customization Options: Single screw, multi-screw, parallel twin-screw, and other configurations to meet customer needs, optimizing supply chain and cost reduction.

6. Online Scrap Recycling: Technology to reduce production costs and enhance material utilization.

7. Comprehensive Support: On-site layout and public works solutions, offering full engineering support and one-stop project solutions.

GWELL’s EVA photovoltaic encapsulation film equipment provides high-quality, efficient, and cost-effective solutions, making it a competitive choice in the market.