Preparation method of polyester chip for solar battery back film

A technology of solar cells and polyester slices, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as high production costs, uneven dispersion, and harm to human body, and achieve environmental and human friendliness, good light aging resistance, and promote The effect of crystallization ability

Inactive Publication Date: 2016-05-04
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deficiency of this document is that the addition of anti-hydrolysis agents and ultraviolet absorbers not only has problems such as environmental pollution and harm to the human body, but also reduces the optical and mechanical properties of the material to a certain extent.
The deficiency of this document is that the price of modified polyester resin chip is relatively high, resulting in high production cost
[0007] In addition, there is a common problem in the above two documents: two or more polyester chips need to be blended to prepare polyester film, which is very easy to produce uneven

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example

[0019] (Example 1)

[0020] The preparation method of the polyester chip for solar cell back sheet film of this embodiment has the following steps:

[0021] ① An aqueous solution of spherical silica with a particle diameter of 50 nm is ultrasonically dispersed and then added to the ethylene glycol solution, and heated to 105° C. for solvent replacement and water removal to obtain an ethylene glycol suspension containing nano-scale silica.

[0022] ② Mix anatase titanium dioxide with a particle size of 0.5 μm, a silane coupling agent and ethylene glycol, and then disperse them through a colloid mill and a ball mill to obtain an ethylene glycol suspension containing micron-sized anatase titanium dioxide.

[0023] ③Add the ethylene glycol suspension containing nano-sized silica obtained in step ①, the ethylene glycol suspension containing micron-sized anatase titanium dioxide obtained in step ②, terephthalic acid and ethylene glycol to the slurry kettle In, mixing and stirring to obtain ...

Example

[0030] (Example 2 to Example 4)

[0031] The preparation method of the polyester chips for solar cell backsheet films of each embodiment is basically the same as that of Example 1, and the differences are shown in Table 1.

[0032] Table 1

[0033]

Example

[0034] (Application example 1)

[0035] This application example uses the polyester chips prepared in Example 1 to prepare a solar cell back sheet film, which specifically includes:

[0036] The polyester chips prepared in Example 1 were dried at 165°C for 5 hours. When the moisture content of the polyester chips was lower than 50ppm, they were injected into the extruder and melted and extruded at 270°C to 290°C. After stretching, transverse stretching, and heat setting, the solar cell back sheet film is made by winding.

[0037] Among them, the longitudinal stretch ratio is 3.5 times, the transverse stretch ratio is 3.5 times, and the heat setting temperature is 220°C.

[0038] The various properties of the solar cell back sheet film were tested, and the results are shown in Table 2.

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PUM

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Abstract

The present invention discloses a preparation method of a polyester chip for a solar battery back film. A polyester chip semi-finished product with intrinsic viscosity of 0.60-0.64 dl/g and terminal carboxyl group content of 12-18 mol/t is subjected to solid phase polycondensation to obtain the polyester chip for solar battery back film with intrinsic viscosity of 0.75-0.80 dl/g and terminal carboxyl group content of 5-10 mol/t. The preparation method has simple reaction conditions and low production costs; the obtained polyester chip can be separately produced into polyester film suitable for solar battery back without the addition of an anti-hydrolysis agent or an ultraviolet absorber, wherein the polyester film has good water vapor barrier property, resistance to wet heat aging and resistance to light aging. The method is not only friendly to the environment and human, but also avoids the problems of uneven dispersion and inconsistency of product performance of blend film production.

Description

technical field [0001] The invention relates to a method for preparing a polyester chip, in particular to a method for preparing a polyester chip for a solar battery backplane film. Background technique [0002] Solar cells are mainly prepared by laminating toughened glass, EVA glue, battery sheets, and back sheets. Solar cells are easily corroded by water vapor, acid gas, etc., causing their performance to decline. The backsheet has reliable insulation, water resistance, and aging resistance, and supports and protects the solar cells to ensure the long-term service life and stability of the solar cells. [0003] Existing solar cell backsheet films mainly include glue-coated composite backsheet films and coated backsheet films. The common backsheet structures mainly include TPT, TPE, etc., where T stands for fluorine-containing film, E stands for EVA film, and P stands for PET film. [0004] PET film usually has good mechanical properties, optical properties, and chemical...

Claims

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Application Information

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IPC IPC(8): C08G63/80C08G63/183C08K9/06C08K3/22C08K3/36C08K3/30C08L67/02H01L31/049
CPCY02E10/50C08G63/80C08G63/183C08J5/18C08J2367/02C08K3/22C08K3/30C08K3/36C08K9/06C08K2003/2227C08K2003/2241C08K2003/265C08K2003/3045C08K2201/003C08K2201/011C08L67/02C08L2203/16C08L2203/204H01L31/0481
Inventor 王亮于维波朱新忠吕青峰
Owner HEFEI LUCKY SCI & TECH IND
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