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High-cohesiveness polyester film, method for preparing same as well as solar cell back panel

A polyester film, high adhesion technology, applied in the field of polyester film, can solve the problem of delamination or peeling off of solar back film, and achieve the effects of avoiding peeling, good adhesion, and increasing polarity

Active Publication Date: 2013-04-03
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the defects of delamination or peeling in the existing solar back film, the invention provides a kind of high adhesive polyester film, its preparation method and solar cell back sheet

Method used

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  • High-cohesiveness polyester film, method for preparing same as well as solar cell back panel
  • High-cohesiveness polyester film, method for preparing same as well as solar cell back panel
  • High-cohesiveness polyester film, method for preparing same as well as solar cell back panel

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preparation example Construction

[0041] The preparation method of the high adhesiveness polyester film provided by the invention comprises the steps:

[0042] (1) Put the polyester chip and modified masterbatch into the crystallization drying tower to dry, and after drying, enter the extruder to melt and extrude, cool the cast sheet, and stretch it longitudinally;

[0043] (2) Coating the ethyl acetate solution of maleic anhydride and hydroxyethyl methacrylate online, and coating the solution on the upper and lower surfaces of the substrate obtained in step (1), with a coating thickness of 0.1-5 μm;

[0044] (3) The base material obtained in step (2) is subjected to transverse stretching, heat setting treatment, microwave modification and grafting treatment, winding, and cutting to obtain the high-adhesive polyester film.

[0045] Prepare high adhesiveness polyester film according to above-mentioned method, the method for testing its adhesiveness is as follows:

[0046] Form a pressure-sensitive adhesive layer...

Embodiment 1

[0052] Configure the ethyl acetate solution of maleic anhydride and hydroxyethyl methacrylate; the weight ratio of maleic anhydride and hydroxyethyl methacrylate is 3:7, and in the solution, maleic anhydride and hydroxyethyl methacrylate The content of ethyl ester is 50%; the modified polyester masterbatch is prepared by a twin-screw granulator, and the obtained modified masterbatch contains 50% rutile titanium dioxide with a particle size of 0.3 μm, and 5% rutile titanium dioxide with a particle size of 2 μm. Silicon and 45% film grade polyester chips.

[0053] Prepare high-adhesive polyester film according to the above method, put 100 parts by weight of polyester chips and 5 parts by weight of modified masterbatch into a crystallization drying tower at 160 ° C for 4-5 hours, when polyester chips and modified When the moisture content of the masterbatch is lower than 50ppm, enter the extruder to melt and extrude at 260-280°C, pass through a 150-mesh filter for coarse filtrati...

Embodiment 2

[0055] Configure the ethyl acetate solution of maleic anhydride and hydroxyethyl methacrylate; the weight ratio of maleic anhydride and hydroxyethyl methacrylate is 2:3, and in the solution, maleic anhydride and hydroxyethyl methacrylate The content of ethyl ester is 30%; the modified masterbatch is prepared, and the obtained modified masterbatch contains 50% zinc oxide with a particle size of 0.5 μm, 8% silica with a particle size of 1.5 μm and 42% film-grade polyester chips .

[0056] Prepare high-adhesive polyester film according to the above method, put 100 parts by weight of polyester chips and 10 parts by weight of modified masterbatch into a crystallization drying tower at 160 ° C for 4-5 hours, when polyester chips and modified When the moisture content of the masterbatch is lower than 50ppm, it enters the extruder, melts and extrudes at 260-280°C, passes through a 150-mesh filter for coarse filtration, and a 400-mesh filter for fine filtration. Cool the cast sheet wi...

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Abstract

The invention relates to the technical field of polyester films, and in particular relates to a high-cohesiveness polyester film, a method for preparing the same and a solar cell back panel. In order to solve the defect of layering or falling off of the conventional solar back film, the invention provides the high-cohesiveness polyester film, the method for preparing the same and the solar cell back panel. The polyester film comprises a base layer, wherein the two sides of the base layer are respectively adhered with a high cohesive layer, and a high cohesive layer material is a copolymer of maleic anhydride and hydroxyethyl methacrylate. The high-cohesiveness polyester film provided by the invention has good cohesiveness, and the method for preparing the same is simple in technology and is easy to operate. The solar cell back panel which is prepared from the polyester film cannot layer or fall off.

Description

technical field [0001] The invention relates to the technical field of polyester films, in particular to a highly adhesive polyester film, a preparation method thereof and a solar cell backboard. Background technique [0002] Solar backsheet (also known as solar back film, solar battery back film) plays the role of waterproof, insulation, aging resistance and supporting cells in solar glass laminated panels. At present, the traditional solar cell back film on the market is a composite film with a three-layer structure of TPT or KPK, where "T" represents the Tedlar type polyvinyl fluoride film (PVF) produced by DuPont Company of the United States, and "P" represents polyvinyl fluoride film (PVF). Polyethylene terephthalate film (PET), "K" stands for polyvinylidene fluoride film (PVDF). Due to the excellent chemical resistance, aging resistance, corrosion resistance and high barrier properties of fluorine film, various companies have developed various fluorine films, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J135/00C09J133/14H01L31/048H01L31/049
CPCY02E10/50
Inventor 不公告发明人
Owner NINGBO CHANGYANG TECH
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