DuPont™ PV5400 Series

Photovoltaic Encapsulant Sheets Based on DuPont™ SentryGlas® Ionomer

DuPont™ PV5400 Series encapsulant is an ionomer-based technology that brings interesting new performance properties to manufacturers of glass/glass PV modules, including:• Exceptionally low moisture ingress• High electrical resistivity• High melt flow (for processing speed)• Increased module strength• No acetic acid, no plasticizer• No refrigeration, no interleaving

Minimize Moisture IngressA key requirement for long-lasting PV modules is to prevent moisture ingress. To minimize moisture ingress, the inherent performance characteristics required in the encapsulant include:• low moisture pickup• low diffusion coefficients• low moisture equilibrium levels

DuPont ™ PV5400 ionomer encapsulants show outstanding performance in all three areas, resulting in overall low moisture ingress behavior.

DuPont ionomer-based photovoltaic encapsulant sheeting offers excellent strength, weathering and dielectric properties in a high-productivity roll stock

DuPont™ PV5400 Series encapsulant provides customizable solutions for innovative module designs.

Increase ResistivityAnother key feature for an encapsulant is its isolation performance or electrical resistivity. Surface and volume resistivity of DuPont™ PV5400 ionomer up to two orders of magnitude higher than EVA and three to four times higher than PVB’s resistivity (measured according to ASTM D257 at 23°C and 25% RH).

Increase System Rigidity, DurabilityDuPont ionomer encapsulants are up to 100 times stiffer and five times stronger than typical PVB encapsulants. The stiffer encapsulant significantly increases the mechanical load-sharing between the two layers of glass, resulting in a more durable structure. This also means that glass/glass PV modules can be designed to experience less than half the rate of deflection when compared to same modules with PVB, under the same load.

Reduce Lamination Cycle TimeA very important part of the total cost of PV modules is the lamination process. Lamination tests with commercial a-Si and CdTe modules on non-autoclave equipment show that using the new DuPont™ PV5400 ionomer can significantly reduce cycle time versus using PVB or EVA.

Table 1 provides a summary of key physical test data for DuPont™ PV5400 Series sheets.

DuPont offers the photovoltaic industry’s widest choice of solutions for encapsulating and protecting the sensitive power-generating layers of efficient solar modules.

Table 1 - Properties of DuPont™ PV5400 Ionomer-Based Encapsulant Sheet

Property Test Method Test Conditions Units Value

Physical Properties

Specific Gravity ASTM D792 23°C 0.95

Mechanical Properties

Tensile Strength ASTM D882 23°C / 50% RH Mpakpsi

24.13.5

Elongation at Break ASTM D882 23°C / 50% RH % 357

Young’s Modulus ASTM D882 23°C / 50% RH Mpakpsi

39457.2

Tensile Modulus ASTM D882 23°C / 50% RH Mpakpsi

29142.3

Shore D Hardness ASTM D2240 60

Moisture Properties

Max, Equilibrium Moisture at 85°C / 85% RH 2000 hrs 0.38 mm % .27

Water Vapor Transmission Rate ASTM F1249 38°C / 100% RH g mm / m2-day 0.66

Optical Properties

Refractive Index ASTM D542 23°C 1.49

Yellowness Index - 15 mil / 0.38 mm ASTM E313 1.9

Luminous Transmittance – 15 mil / 0.38 mm ASTM D1003 % 93.4

Haze ASTM D1003 % 2–3

Thermal Properties

Coefficient of Thermal Expansion ASTM D696 -20 to +32°C 10-5 cm / cm-°C 15–18

Melt Point (by DSC – peak enthalpy) ASTM D3418 °C 87.8

Melt Flow Rate ASTM D1238 190°C / 2160 g g / 10 min 25

Electrical Properties

Surface Resistivity ASTM D257 23°C / 25% RH Ohms 3 x 1016

Volume Resistivity ASTM D257 23°C / 25% RH Ohm-cm 6 x 1015

For more information about DuPont™ PV5400 Series encapsulants or other DuPont Photovoltaic Solutions, please visit our website:

www.photovoltaics.dupont.comCopyright © 2013 DuPont. All rights reserved. The DuPont Oval Logo, DuPont™, and all DuPont products denoted with ® or ™ are registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates.This information corresponds to our current knowledge on the subject. It is offered solely to provide possible suggestions for your own experimentations. It is not intended, however, to substitute for any testing you may need to con-duct to determine for yourself the suitability of our products for your particular purposes. This information may be subject to revision as new knowledge and experience becomes available. Since we cannot anticipate all variations in end-use conditions, DuPont makes no warranties, and assumes no liability in connection with any use of this information. Nothing in this publication is to be considered as a license to operate under or a recommendation to infringe any patent right.CAUTION: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, see “DuPont Medical Caution Statement,” H-50102-4. K-25339-2 09/13

Sheets Optimized for PV Module ManufacturingDuPont™ PV5400 Series encapsulant sheeting is available in thicknesses ranging from 0.25 mm (10 mil) to 0.50 mm (20 mil), providing a customizable solution to innovative module designs.

Unmatched Ionomer Science and R&D SupportDuPont has invested more than any other encapsulants supplier in R&D and capital facilities to serve the PV industry. No other partner can better help you find more productive paths to manufacturing speed and cost efficiencies using ionomer film and sheet technology.

DuPont™ PV5400 Series encapsulants are part of a broad and growing portfolio of PV-related products from DuPont, drawing not only from traditional PV supply experience but also from related industries such as packaging films and seals, roofing liners and membranes, and industrial panel manufacturing.

DuPont supports its DuPont™ PV5400 Series customers with a dedicated PV encapsulants application development team offering access to fully equipped DuPont™ PV materials, module assembly, and testing labs globally.

Technical development and test support capability from DuPont ranges from weathering and material interaction to full-scale module assembly, efficiency, dielectric and mechanical testing.