A9918 Datasheet

Americas Europe Asia Specialized Technology Resources, Inc. 24 Scitico Road PO BOX 813 Somers, CT 06071-0813 USA Phone: +1 860-763-7014 ext: 2560 Email: Susan.Wilson@STRSolar.com Specialized Technology Resources, España Parque Tecnologico de Asturias, parcela 36 33428 Llanera, Asturias SPAIN Phone: +34 985 73 23 33 Email: Raquel.Moran@STResp.com Specialized Technology Resources, Malaysia Plot 20, Jalan Tanjung A/3 Port of Tanjung Pelepas 81560 – Gelang Patah, Johor MALAYSIA Phone: +607 507 3185 ext:113 Email: Karen.Pong@STRSolar.com WWW.STRSOLAR.COM 2011-08 SRW Technical Data PHOTOCAP® A9918P/UF Photocap® A9918P/UF is a standard cure EVA (ethylene vinyl acetate copolymer) photovoltaic encapsulating film material. This product is the original EVA encapsulant that was first commercialized in 1979 and has been continuously produced and utilized for PV module constructions for over 30 years. Photocap A9918P/UF can be used for all crystalline silicon photovoltaic module constructions, and for many thin film photovoltaic designs. Photocap A9918P/UF is provided as extruded rolled film ready for use in thermal lamination processes. The extruded product can be provided smooth, or with surface texture to improve vacuum lamination. Suffix “P” on the Photocap product name indicates that his grade is self-priming for adhesion to glass. Suffix “UF” indicates User Friendly, or lower shrinkage product for improved lamination stability. Properties Test Method Units Condition Results ASTM Physical Mechanical Tensile Strength D638 MPa 23°C, 250 mm/min elongation rate 13 Ultimate Elongation D638 % 23°C, 250 mm/min elongation rate 550 10% Secant Modulus D638 MPa 23°C, 250 mm/min elongation rate 9.8 Hardness D2240 Shore A/D 23°C 69 / 21 Adhesion to Glass STR N/cm 23°C 70-90 Water Absorption D570 wt% 23°C < 0.1 Optical Optical Transmission E424 % 23°C, 0.46 mm thickness 92 UV Cutoff Wavelength E424 nm 23°C, 0.46 mm thickness 360 Refractive Index D542 - 23°C, 0.46 mm thickness 1.482 Electrical Volume Resistivity D257 ohm cm 23°C >1 x 1014 Dielectric Strength D149 kV/mm 23°C, 500V/sec 24 Dielectric Strength D149 V/mil 23°C, 500V/sec 600 Tests are made in accordance with the current issue of the ASTM, or other cited test method. Test data reported here are nominal values measured on extruded films, 0.5 mm thick, or compression molded sheets and test bars, which have been cured at 150°C for 7 minutes with a laboratory press. PHOTOCAP® is a registered trademark of Specialized Technology Resources, Inc. The data set forth above is believed to be accurate. It is for informational purposes only and is not to be used for specification purposes. Neither Specialized Technology Resources, Inc., nor any of its affiliates, makes any representation or warranty as to, and disclaims all liability for, the information herein. PHOTOCAP is to be used by technically skilled persons at their own discretion and risk. WWW.STRSOLAR.COM 2011-08 SRW Technical Data page 2 PHOTOCAP® A9918P/UF AGENCY APPROVALS: Modules that are properly constructed with Photocap A9918P/UF have passed the requirements for performance specifications UL 1703, IEC 61215, and IEEE 1262. Photocap A9918P/UF is UL listed with testing to 746D at all STR manufacturing plants. Please refer to UL file numbers E335471, E335472, E335473, and E335474. SHRINKAGE: STR's User Friendly (UF) technology results in nearly zero shrinkage during lamination with glass and PV cells. Sheets can be cut closer to final size, which results in the use of less material per module. Non shrinking material also allows for development of shorter cycle time through lamination. Many competitive EVA materials exhibit high shrink during lamination which can result in voids, shifting cells and ribbons, and longer cycle times to accommodate for these effects. PROCESS GUIDELINES: Vacuum Lamination Step Heat Cure Cycle Nominal Temperature 155°C Platen Temperature 155°C Vacuum Range < 60 mbar Cure Time 14 min Evacuation Time 4 min Applied Bladder Pressure 910 mbar Target Temperature within the Encapsulant 145°C Time Above the Target Temperature > 4 min Values shown are a recommended starting point for a crystalline silicon photovoltaic module processed with a typical vacuum lamination system. Actual values required to achieve desired cure levels will depend on the specific PV module design and the lamination process used. All Photocap grades are based upon over 30 years of STR’s commercial experience in the photovoltaic market. For further information, please contact the nearest Specialized Technology Resources office or agent.