Multilayered film and method for manufacturing same

A multi-layer film and coating technology, applied in chemical instruments and methods, coatings, layered products, etc., can solve the problems of long-term stability of photovoltaic cells, poor adhesion strength of fluoropolymers, complex manufacturing methods, etc. Achieve excellent durability, ensure adhesive strength, and achieve excellent adhesive strength effects

Active Publication Date: 2014-10-15
LG CHEM LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the manufacturing methods in the prior art are complex and may be susceptible to moisture, which will affect the long-term stability of photovoltaic cells
[0006] In addition, other fluoropolymers such as poly(vinylidene fluoride) (PVDF), chlorotrifluoroethylene (CTFE) or ethylene chlorotrifluoroethylene (ECTFE) have been gradually replaced by PVF membranes for photovoltaics. Backsheets for batteries, but fluoropolymers still suffer from poor bond strength

Method used

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  • Multilayered film and method for manufacturing same
  • Multilayered film and method for manufacturing same
  • Multilayered film and method for manufacturing same

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Embodiment approach

[0101] According to the present application, the above method is used first to form the primer layer, and then the coating method is used to form the fluoropolymer coating. In the present application, the coating solution for forming the fluoropolymer coating can be obtained by dissolving or dispersing the various components forming the above-mentioned fluoropolymer coating in a solvent having a relatively low boiling point (especially a solvent having a boiling point of 200° C. or lower). ) to prepare. According to an exemplary embodiment of the present application, when the fluoropolymer has an amorphous region or is mixed with an amorphous resin, the components forming the fluoropolymer coating can be effectively dissolved in a solvent having a relatively low boiling point. Therefore, in this application, since a high-temperature drying step is not required in the manufacturing process, the manufacturing cost can be saved, and the quality of the product can also be improved...

preparation Embodiment 1 to 6

[0130] Preparation Examples 1 to 6: Preparation of Primer

[0131] 300 g of toluene was put into the reactor, and the temperature in the reactor was kept at 80°C. In this case, the inside of the reactor was filled with nitrogen gas to suppress oxidation reaction due to external air, and the reaction product was continuously stirred in a stirrer to promote the reaction. The temperature condition was set at 80°C, and various acrylic monomers prepared as listed in Table 1 below were charged into the reactor. After the addition of the acrylic monomer is complete, add the silane coupling agent KBM503. In this case, the mixing ratio and addition amount of the acrylic monomer and the silane coupling agent prepared in each preparation example are listed in Table 1.

[0132] Next, 1 g of 2,2-azobis(2,4-dimethylvaleronitrile) (V-65) as an initiator was dissolved in 20 g of toluene, and added to the reaction with a syringe for radical copolymerization. The resulting mixture was stirre...

Embodiment 1 to 12

[0136] Preparation of Substrate Layers

[0137] The surface of a PET film (thickness: 250 μm, available from Kolon corp) whose surface was treated with an acrylic primer was subjected to corona treatment.

[0138] The surface of the PET film was coated with an adhesive, dried at 100° C. for 1 minute, and then adhered to an aluminum foil (Al foil) having a thickness of 20 μm using a laminator. The rolls of the laminator were kept at a temperature of 60°C when the PET film was adhered to the Al foil. Afterwards, sufficient curing time is used to cure the adhesive in an aging step in which the adhesive is left to stand at room temperature for 1 day, and then left to stand in an oven at a temperature of 40 to 60° C. for 4 days. The solid content of the adhesive is adjusted so that the thickness of the adhesive after drying is about 10 to 13 μm.

[0139] Preparation of Coating Solution for Fluoropolymer Coating

[0140] Preparation of White Fluoropolymer Coating Solution

[014...

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Abstract

The present invention provides a multilayered film, a method for manufacturing same, and a photovoltaic module. According to the multilayered film of the present invention, a barrier film having superior moisture barrier properties may be coated with fluoropolymer by using a primary layer including a silane-modified acrylic copolymer as a medium. Also, the multilayered film may secure interface adhesion in order to provide superior durability and weatherproofing and have superior interface adhesion with respect to a barrier film. In addition, when the multilayered film is manufactured, manufacturing costs may be reduced, productivity may be improved, and deterioration of quality due to thermal deformation or thermal shock may be prevented. Thus, the multilayered film may be, for example, effectively used for back surface sheets of various photovoltaic modules.

Description

technical field [0001] The present application relates to a multilayer film, its preparation method, auxiliary materials for the preparation of photovoltaic modules and photovoltaic modules. Background technique [0002] In recent years, renewable and clean energy sources have received much attention due to global environmental concerns and the depletion of fossil fuels. Among them, solar energy has attracted much attention as a representative non-polluting energy source, which can solve the problems of environmental pollution and fossil fuel consumption. [0003] A photovoltaic cell applying the principle of solar photovoltaic power generation is a device configured to convert sunlight into electricity. Since the photovoltaic cell needs to be exposed to the external environment for a long time to facilitate the absorption of sunlight, various packaging steps are performed to prepare the photovoltaic cell in the form of a unit to protect the photovoltaic cell. Such units a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J5/18C09D127/12B32B27/08C08J7/043
CPCC09D127/12H01L31/18B32B27/08H01L31/0487H01L31/049Y02E10/50C08J7/04B32B27/28C09D143/04C08J2427/12C08J2327/12C08J2333/00C08J7/0423C08J7/043C08F220/14C08F230/085C08F220/1802C08F220/325C08F230/08C08J7/042
Inventor 金贤哲高贤星
Owner LG CHEM LTD
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