Multilayer composite films and articles prepared therefrom

Inactive Publication Date: 2006-07-27
PERFORMANCE MATERIALS NA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] The present inventors have made the surprising discovery that one or more physical properties of a polymer

Problems solved by technology

Poor light transmission reduces the efficiency and/or productivity of the photovoltaic generation process.
However, EVA may have certain limitations or deficiencies, such as its tendency to discolor.
Also, it can decompose and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0056] The Examples and Comparative Examples are presented for illustrative purposes only, and are not intended to limit the scope of the present invention in any manner.

[0057] In the following experiments cast film was made on a Sano multi-layer extrusion line. The total structure of thickness 460 microns structure comprised of 25 micron thick identical Surlyn® 1705-1 (Du Pont, Wilmington, Del.) outer layers bounding a 410 micron thick core layer comprising a second resin.

[0058] Secant Modulus was measured on film samples (Instru-Met load frame 1122 tensile tester using ASTM D 882-01)

[0059] % Haze was measured on film samples (BYK Gardner haze-gard plus using ASTM D 1003-00)

[0060] % Transmittance was measured on film samples (Varian Cary 5 uv / vis / nir, System I.D. Cary5-1081139 scanned from 800 nm to 200 nm and reported at 500 nm). The expectation value of the transmittance was calculated as the layer thickness weighted value calculated from the absorbance per unit thickness of ...

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PUM

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Abstract

The present invention is an optically transparent laminate film comprising: at least three layers of film, wherein at least two of the at least three layers comprise ionomeric films, and wherein the film can be suitable for use in a photovoltaic cell or in packaging.

Description

[0001] This application claims the priority from U.S. Application No. 60 / 634,421, filed Dec. 7, 2004.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates to laminate films useful in packaging in general and as encapsulants in photovoltaic modules in particular. The invention particularly relates to transparent packaging films comprising ethylene acid copolymer ionomers. [0004] 2. Description of the Related Art [0005] Good optical properties are important in packaging materials in general and solar cell modules in particular because good performance requires that light incident to the cell be transmitted efficiently and effectively to the voltage-generating layer. Poor light transmission reduces the efficiency and / or productivity of the photovoltaic generation process. [0006] For example, a common form of solar cell module is made by interconnecting individually formed and separate solar cells made for example of crystalline silicon, and then mec...

Claims

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Application Information

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IPC IPC(8): B32B27/08
CPCB32B17/10743Y10T428/1352B32B27/28B32B27/30B32B2250/03B32B2250/24B32B2307/412B32B2439/60B32B2457/12B32B2553/00Y02E10/50H01L31/048B32B17/10431B32B27/308B32B2250/40B32B2307/734B32B2333/00B32B27/08B32B27/304B32B27/36B32B7/02B32B27/00H01L31/042B32B2375/00B32B2327/06B32B2367/00H01L31/0481Y10T428/31786Y10T428/31928Y10T428/31551Y10T428/31645Y10T428/3158B32B2333/04B32B2323/04B32B27/32B32B2439/00B32B2605/006
Inventor LENGES, GERALDINE M.BOERI, DIEGO
Owner PERFORMANCE MATERIALS NA INC
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