US 9,312,415 B2 · Multi-layered sheet and method of preparing same

Abstract

Provided are a multi-layered sheet, a backsheet for a photovoltaic cell, a method of preparing the same and a photovoltaic module. The multi-layered sheet in which a resin layer including a fluorine-based resin has excellent durability and weather resistance, and also exhibits strong interfacial adhesion to a substrate or polymer coating layer is provided. When a drying process is performed at a low temperature in preparation of the multi-layered sheet, production cost can be reduced, producibility can be increased, and degradation in the quality of a product caused by thermal deformation or thermal shock can be prevented. Such a multi-layered sheet may be effectively used as a backsheet for various photovoltaic cells.

Claims18

Dependent claims

A multi-layered sheet comprising:

a substrate;
and
a fluorine-based resin layer,
wherein the multi-layered sheet further comprises a polymer coating layer that is compatible with a fluorine-based resin between the substrate and the fluorine-based resin layer,
wherein the fluorine-based resin layer includes a fluorine-based resin having an amorphous region and having a crystallinity of 10% to 50%,
wherein the fluorine-based resin is a copolymer including vinylidene fluoride and a comonomer in a polymerized type or a branched polymer,
wherein the comonomer in the copolymer is 10 to 30 wt % based on the total weight of the copolymer, and
wherein the overall crystallinity of the fluorine-based resin layer is 10 to 35%.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/695,739Filed 29 Apr 2011

Priority

KR 10-2010-00425316 May 2010

Published

US 2013/0171447 A14 Jul 2013

Granted

12 Apr 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification33 codes

C08J 7/043
Coating: improving the adhesiveness of the coatings per se, e.g. forming primers
C08J 7/042
Coating: with two or more layers, where at least one layer of a composition contains a polymer binder
H10F 19/804
Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells: materials of encapsulations
H10F 19/85
Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells: protective back sheets

Multi-layered sheet and method of preparing same

Life of this patent

Multi-layered sheet and method of preparing same

Life of this patent

Abstract

Claims18