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Superposition method for multilayer film and solar battery backplane manufactured by method

A technology of laminated film and manufacturing method, which is applied in the field of solar cells, can solve the problems of heat sealing performance reduction, not mentioned the lamination of fluorine-containing polymers and non-fluorine polymers, etc.

Active Publication Date: 2011-05-04
DUPONT ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Higher extrusion temperature will improve adhesion, but will reduce heat sealing performance
[0015] However, the prior art does not mention how to laminate fluoropolymers and non-fluoropolymers by extrusion compounding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Polyvinyl fluoride / ethylene-butyl acrylate copolymer / biaxially oriented polyethylene terephthalate laminate membrane

[0091] Polyvinyl fluoride film (25 μm thick, trade name (purchased from DuPont, USA) and a biaxially stretched polyethylene terephthalate film (250 microns, stretched 3.5 times in the longitudinal direction and 3 times in the transverse direction) were subjected to corona treatment.

[0092] On the extrusion coating / compositing equipment produced by Davis Standard, the above-mentioned biaxially stretched polyethylene terephthalate film is used as the first unwinding, the above-mentioned polyvinyl fluoride film is used as the second unwinding, and the vinyl- Butyl acrylate copolymer (25 microns thick, containing 17% by weight butyl acrylate, melt index is 7, purchased from U.S. DuPont) is melt-extruded in extruder (being 180 ℃ from feeding to die head temperature, 210 °C, 250 °C, 280 °C, 310 °C) between the polyvinyl fluoride film and the biaxially...

Embodiment 2

[0096] Polyvinyl fluoride / ethylene-acrylic acid copolymer / biaxially oriented polyethylene terephthalate laminate film

[0097] Use the same method as in Example 1 to polyvinyl fluoride film (25 microns thick, trade name (purchased from DuPont, USA) and a biaxially stretched polyethylene terephthalate film (250 microns, stretched 3.5 times in the longitudinal direction and 3 times in the transverse direction) were subjected to corona treatment.

[0098] On the extrusion coating / compositing equipment produced by Davis Standard, the polyvinyl fluoride film is used as the first unwinding, and the ethylene-acrylic acid copolymer (25μ, containing 12% by weight of acrylic acid, with a melt index of 13.5, purchased from DuPont, U.S. ) is melt-extruded in an extruder (from feed to die at 190°C, 230°C, 260°C, 290°C, 320°C) attached to polyvinyl fluoride and biaxially stretched polyethylene terephthalate On the interface of the alcohol ester film, after cooling, it is wound up to obt...

Embodiment 3

[0109] Polyvinyl fluoride / ethylene-acrylic acid copolymer / biaxially oriented polyethylene terephthalate / polyethylene fluoride vinyl laminated film

[0110] Use the same method as in Example 1 to polyvinyl fluoride film (25 microns thick, trade name Purchased from U.S. DuPont) and biaxially stretched polyethylene terephthalate film (PET, 250 microns, stretched 3.5 times in the longitudinal direction and 3 times in the transverse direction) for corona treatment, only the two surfaces of the PET are processed.

[0111] Polyvinyl fluoride film is used as the first unwinding on multi-die head continuous extrusion coating / composite equipment, and ethylene-acrylic acid copolymer (25 μ, containing 12 weight % acrylic acid, melt index is 13.5, is purchased from U.S. DuPont Company ) is melt-extruded in an extruder (from feed to die at 190°C, 230°C, 260°C, 290°C, 320°C) attached to polyvinyl fluoride and biaxially stretched polyethylene terephthalate On the interface of the alcoh...

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Abstract

The invention discloses a manufacturing method for a multiplayer superposed film, comprising the following steps: (a) providing a fluorine-containing polymer film; (b) providing a drawn polyester film; (c) providing an ethene polymer; and (d) at the temperature of 270 DEG C or above, adopting an extrusion coating method to form the multiplayer superposed film containing the fluorine-containing polymer, an ethene copolymer and the drawn polyester, wherein the ethene copolymer is selected from one or a mixture of an ethene / (methyl) acrylic copolymer, an ethene / (methyl) acrylic C1-6 carbalkoxy copolymer, and an ethene / olefinic bond unsaturated carboxylic acid [except for (methyl) acrylic acid] at any ratio; and the content of ethene in the ethene copolymer is 60-90wt%, 60-85wt% preferable, and 70-80wt% more preferable. The invention also discloses a multilayer superposed film manufactured by the method in the invention and a solar battery panel provided with the multilayer superposed film.

Description

technical field [0001] The invention relates to a method for laminating multilayer films and a multilayer laminated film formed by the method. The invention also relates to a solar cell made by using the multilayer laminated film as a back sheet. Background technique [0002] With the warming of the global climate, the governments of various countries have higher and higher requirements for energy conservation and emission reduction. Therefore, finding new energy sources to replace fossil fuels has become an urgent problem to be solved. [0003] Solar energy is a clean, pollution-free and inexhaustible source of energy. At present, solar energy is mainly converted into electrical energy through solar panels, which is then used to drive electric water heaters, electric vehicles, satellite components, etc. [0004] A solar panel is a photoelectric element that directly generates electricity from light, especially sunlight. Existing solar panels mainly include a backsheet, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/06H01L31/18B32B27/08H01L31/048H01L31/0203B29C48/08B29C48/154B29C48/21
CPCB32B17/10018B32B17/10788B32B27/08B32B27/304B32B27/308B32B27/36B32B2367/00Y02E10/50H01L31/049B32B7/12B32B15/08B32B15/20B32B27/32B32B27/322B32B2255/10B32B2255/20B32B2270/00B32B2307/206B32B2307/514B32B2307/712B32B2307/7244B32B2307/7246B32B2457/12B29C48/08B29C48/0011B29C48/154B29C48/21Y10T428/2848Y10T428/3154B32B37/02H01L31/04H01L31/18
Inventor 吴秋菊
Owner DUPONT ELECTRONICS INC
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