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US 2012/0067420 A1Published application
Multilayer composite films and articles prepared therefrom
AssigneeE. I. Du Pont de Nemours and Company
InventorGeraldine M. Lenges
Life of this patent
Estimating the term…
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.
Claims26
An article for preparing a solar cell module which is a sandwich comprising:
- (a) a front support layer formed of light transmitting material,
- (b) at least one solar cell,
- (c) a transparent encapsulant laminate positioned adjacent to at least one surface of the solar cell(s), and
- (d) a backskin layer,
- wherein the transparent encapsulant laminate comprises:
- (A) two outer films layers of ionomer copolymer obtained by the copolymerization of ethylene and an about 8 wt % to about 25 wt % of ethylenically unsaturated C3-C8 carboxylic acid, based on the total weight of the copolymer, and
- (B) at least one layer of ethylene vinyl acetate between the outer films layer of ionomer copolymer.
4 more elements
An article for preparing a solar cell module which is a sandwich comprising:
- (a) at least one solar cell,
- (b) a transparent encapsulant material disposed adjacent to at least one surface of the solar cell which comprises a laminate article comprising:
- (i) a first outer layer that comprises a first ionomer;
- (ii) a core layer unit comprised of at least one core layer polymer located with a first surface next to a surface of the first outer layer;
- and
- (iii) a second outer layer that comprises a second ionomer located next to a second surface of the core layer unit,
- wherein the core layer polymer is ethylene vinyl acetate, and
- wherein the value of the transition temperature under tensile conditions at 1 Hz by DMA for the laminate material is greater than the value of the transition temperature under tensile conditions at 1 Hz by DMA of the core layer polymer measured under identical conditions and not in the laminate,
- (c) a front support layer formed of light transmitting material, and
- (d) a backskin layer disposed,
- wherein the at least one solar cell and transparent encapsulant material are disposed between the front support layer and the backskin layer.
8 more elements
An article for preparing a solar cell module which is a sandwich comprising in order:
- (a) a front support layer formed of light transmitting material,
- (b) a transparent encapsulant laminate,
- (c) at least one solar cell,
- (d) an encapsulant or seal layer, and
- (e) a backsheet layer;
- wherein the transparent encapsulant laminate comprises:
- (A) two outer films layers of ionomer copolymer obtained by the copolymerization of ethylene and an about 8 wt % to about 25 wt % of ethylenically unsaturated C3-C8 carboxylic acid, based on the total weight of the copolymer, and
- (B) at least one layer of ethylene vinyl acetate between the outer films layer of ionomer copolymer.
5 more elements
An article for preparing a solar cell module which is a sandwich comprising in order:
- (a) a front support layer formed of light transmitting material,
- (b) a first transparent encapsulant laminate,
- (c) at least one solar cell,
- (d) a second encapsulant laminate, and
- (e) a backsheet layer;
- wherein the first transparent encapsulant laminate and the second encapsulant laminate each comprise:
- (A) two outer films layers of ionomer copolymer obtained by the copolymerization of ethylene and an about 8 wt % to about 25 wt % of ethylenically unsaturated C3-C8 carboxylic acid, based on the total weight of the copolymer, and
- (B) at least one layer of ethylene vinyl acetate, between the outer films layer of ionomer copolymer.
5 more elements
An article for preparing a solar cell module which is a sandwich comprising in order:
- (a) a front support layer formed of light transmitting material,
- (b) a transparent encapsulant laminate,
- (c) at least one solar cell, and
- (d) an encapsulant or seal layer, which also comprises a backsheet layer;
- wherein the transparent encapsulant laminate comprises:
- (A) two outer films layers of ionomer copolymer obtained by the copolymerization of ethylene and an about 8 wt % to about 25 wt % of ethylenically unsaturated C3-C8 carboxylic acid, based on the total weight of the copolymer, and
- (B) at least one layer of ethylene vinyl acetate between the outer films layer of ionomer copolymer.
4 more elements
Dependencies are inferred from the claim text.