Polyester film photovoltaic backboard with high hydrolysis resistance

A technology of polyester film and photovoltaic backsheet, applied in the field of composite materials, can solve the problems of high unidirectional shrinkage rate, can not meet the thermal shrinkage rate of solar cell backsheet, etc., achieve low thermal shrinkage rate, meet performance requirements, and be environmentally friendly Effect

Pending Publication Date: 2019-11-29
SHANGHAI HIUV NEW MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high shrinkage rate in one direction, the transverse shrinkage rate within 2 to 3 seconds at 120 ° C is ≥ 70%, which cannot meet the thermal shrinkage rate of solar cell backsheets (150 ° C, 30 min thermal shrinkage rate ≤ 1.5) requirements

Method used

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  • Polyester film photovoltaic backboard with high hydrolysis resistance
  • Polyester film photovoltaic backboard with high hydrolysis resistance
  • Polyester film photovoltaic backboard with high hydrolysis resistance

Examples

Experimental program
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Effect test

Embodiment 1

[0049] In this embodiment, the polyethylene terephthalate-1,4-cyclohexanedimethanol ester used in the upper surface layer A1 or the lower surface layer A2 is 1,4-cyclohexanedimethanol (CHDM) with a molar content of 50% of the total molar content of ethylene glycol and 1,4-cyclohexanedimethanol (CHDM), the specific component content of the upper surface layer A1 or the lower surface layer A2 is as follows:

[0050] The polyethylene terephthalate-1,4-cyclohexanedimethanol is 97wt.%, and the total amount of various additives is 3wt.%.

[0051] The substrate layer B is prepared from titanium dioxide white pigment and polyethylene terephthalate. In this embodiment, the specific component content of the substrate layer B is as follows:

[0052] The polyethylene terephthalate is 94wt.%, the total amount of various additives is 3wt.%, and the titanium dioxide white pigment is 3wt.%.

[0053] The preparation method of the highly hydrolysis-resistant polyester film photovoltaic backpla...

Embodiment 2

[0059] Used in this example, polyethylene terephthalate-1,4-cyclohexanedimethanol is 1,4-cyclohexanedimethanol (CHDM) with a molar content of ethylene glycol and 1,4 -80% of the total molar content of cyclohexanedimethanol (CHDM), the preparation method of other raw materials, substrate layer B and highly hydrolysis-resistant polyester film photovoltaic backplane is the same as that of Example 1.

Embodiment 3

[0061] The polyethylene terephthalate-1,4-cyclohexanedimethanol used in this example is 1,4-cyclohexanedimethanol (CHDM) with a molar content of ethylene glycol and 1,4- The total molar content of cyclohexanedimethanol (CHDM) is 100%, the preparation method of other raw materials, substrate layer B and highly hydrolysis-resistant polyester film photovoltaic backboard is the same as that of Example 1.

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Abstract

The invention relates to a polyester film photovoltaic backboard with high hydrolysis resistance. The backboard comprises a base material layer, a surface layer is arranged on at least one side of thebase material layer, the base material layer comprises a polyester composition of polyethylene glycol terephthalate, the surface layer comprises a polyester composition of polyethylene terephthalate-1, 4-cyclohexanedimethanol ester, and the molar content of 1, 4-cyclohexanedimethanol in the polyethylene terephthalate-1, 4-cyclohexanedimethanol ester is greater than 50% of the total molar contentof ethylene glycol and 1, 4-cyclohexanedimethanol. After biaxial orientation stretching, the polyester film photovoltaic backboard has excellent hydrolysis resistance, ultraviolet aging resistance andthe like.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a photovoltaic backplane, in particular to a highly hydrolysis-resistant polyester film photovoltaic backplane. Background technique [0002] As a key component of crystalline silicon solar modules, the backsheet plays a vital role in the safety, service life and reduction of power attenuation of the modules. To achieve the purpose of protecting the cells, the backsheet must have good mechanical strength and toughness, weather resistance, insulation, water vapor barrier, chemical corrosion resistance and other balanced properties. Backsheets can be divided into two categories: fluorine-containing backsheets and non-fluorine backsheets according to material types. There is a consensus in the industry on the choice of backsheet materials to use fluorine-containing films and fluorine-containing coatings. At present, only fluorine-containing materials have undergone long-...

Claims

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Application Information

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IPC IPC(8): H01L31/049C08K3/22C08L67/02
CPCH01L31/0481H01L31/049C08K3/22C08K2003/2241C08L67/02Y02E10/50
Inventor 李民孟繁寅黄伟光李庆北
Owner SHANGHAI HIUV NEW MATERIALS
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