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Transparent PET backboard of double-layered structure and processing method thereof

A double-layer structure, transparent technology, applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of high cost, poor weather resistance and low yield of transparent backplanes, and achieve the reduction of PET Good water absorption, wear resistance, and high yield

Inactive Publication Date: 2019-06-28
CHANGZHOU HUITIAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims to solve the shortcomings of conventional transparent backboards such as high cost, low yield, poor weather resistance, and yellowing, and provides a double-layer structure transparent PET backboard

Method used

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  • Transparent PET backboard of double-layered structure and processing method thereof
  • Transparent PET backboard of double-layered structure and processing method thereof
  • Transparent PET backboard of double-layered structure and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0104] 1. Preparation of air layer PET particles (particle 1)

[0105] PET resin 100 parts

[0106] Compatibilizer SEBS 15 parts

[0107] Polycarbodiimide 4 parts

[0108] Primary antioxidant 1010 0.2 parts

[0109] Secondary antioxidant 168 0.4 parts

[0110] UV stabilizer UV1577 0.3 parts

[0111] UV absorber LA63P 0.5 parts

[0112] Nucleating agent NA05 0.2 parts

[0113] SiO2 0.3 parts

[0114] Lubricant AX-71 0.3 parts

[0115] White oil 0.2 parts

[0116] Wherein the intrinsic viscosity of the PET resin is 0.69, and the nucleating agent NA05 is produced by Japan Adike Company.

[0117] Dry the PET resin at 120°C for more than 8 hours, remove the water, add SEBS and white oil, mix for 3-5 minutes at a medium speed, add other powder additives, mix for 5-15 minutes at a medium speed, and pass the mixed material through the twin-screw Melt, knead, extrude and water-cool in the extruder, and then cut into pellets after drying. The temperature of each zone of the tw...

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Abstract

The invention relates to the technical field of solar power generation, in particular to a transparent PET backboard of a double-layered structure. The transparent PET backboard structurally comprisesan air layer and an EVA layer. Compatilizers are added into the air layer and the EVA layer for toughening. PE polyolefin is added into the EVA layer to improve the adhesive force with the EVA without PET surface coating treatment. The transparent PET backboard overcomes the defects that an existing transparent backboard is high in cost, yellow and relatively low in production yield and the like.High strength of PET is reserved by means of a double-layered co-extrusion and modified PET technique, and meanwhile, by adding the PE component into the inner PET, the problem of being adhered to EVA is solved, and meanwhile, the water vapor permeability and water absorption of PET are reduced, the weather resistance of PET is improved, yellowing of the backboard is reduced effectively, and meanwhile, the transparent PET backboard is simple in production process, is formed primarily, is relatively low in cost and good in wear resistance, and can meet using demands of a current photovoltaic module in some climate mild regions.

Description

technical field [0001] The invention relates to a PET backboard, in particular to a double-layer transparent PET backboard and a processing method thereof. Background technique [0002] The solar cell module is composed of 5-layer structure, photovoltaic glass, high-transparency EVA, battery sheet, high-ultraviolet high-blocking EVA, and photovoltaic backplane; the photovoltaic backplane is used as the packaging material for the backplane of the module, which mainly plays the role of insulation, water vapor barrier, and increased reflection. . [0003] Conventional solar backsheets are composed of multiple layers of materials. Taking the most common composite KPE structural backsheet on the market as an example, its structure is three layers, the outermost layer (the air contact surface of the backsheet) is PVDF, the middle layer is PET, The inner layer material (EVA adhesive layer) is modified polyolefin film. Common photovoltaic backsheets on the market are white, and ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L79/00C08L53/02C08L91/06C08L23/06C08K5/134C08K5/526C08K3/36C08K13/02B32B27/06B32B27/08B32B27/18B32B27/32B32B27/36H01L31/049
CPCY02E10/50
Inventor 张宪哲黄欢张鑫何甜甜杨琳
Owner CHANGZHOU HUITIAN NEW MATERIALS
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