Double-layer co-extrusion anti-polarization type EVA (ethylene-vinyl-acetate) composite adhesive film and preparation method thereof

A double-layer co-extrusion and anti-polarization technology, which is applied in the direction of chemical instruments and methods, layered products, and other household appliances, to achieve good compatibility, improved anti-PID performance, and high production efficiency.

Active Publication Date: 2019-08-02
CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a double-layer co-extrusion anti-polarization EVA composite adhesive film and its preparation method that can effectively solve the PID problem of photovoltaic modules

Method used

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  • Double-layer co-extrusion anti-polarization type EVA (ethylene-vinyl-acetate) composite adhesive film and preparation method thereof
  • Double-layer co-extrusion anti-polarization type EVA (ethylene-vinyl-acetate) composite adhesive film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add the measured EAA resin (25% acrylate content, 69°C melting point, and 8.5g / 10min melt index) into the first horizontal mixer; then add the measured and evenly mixed The mixed liquid of initiator, co-crosslinking agent, coupling agent, UV stabilizer, UV absorber and antioxidant is evenly sprayed into the resin particles through the liquid spraying device, stirring while spraying, stirring speed 5r / min, metering Spray for 10 minutes, and keep the horizontal mixer at a constant temperature of 40-50°C during the spraying process; after spraying, increase the stirring speed to 12r / min, first rotate forward for 20 minutes, then reverse for 20 minutes, so that the liquid mixing aid is completely absorbed The resin particles are absorbed, and the horizontal mixer is kept at a constant temperature of 40-50°C during the stirring process. At the same time, the measured EVA resin (melt flow rate is 25g / 10min, light transmittance> 86%, volume resistivity ≥ 1.0×10 14 , the m...

Embodiment 2

[0026] (1) Add the measured EMA resin (30% acrylate content, 61°C melting point, 4g / 10min melt index) into the first horizontal mixer; The mixed liquid of agent, co-crosslinking agent, coupling agent, ultraviolet stabilizer, ultraviolet absorber and antioxidant is evenly sprayed into the resin particles through the liquid spraying device, stirring while spraying, stirring speed 8r / min, metered spraying 10min, keep the horizontal mixer at a constant temperature of 40-50°C during the spraying process; after the spraying, increase the stirring speed to 18r / min, first rotate forward for 15min, then reversely stir for 15min, so that the liquid mixing aid is completely covered by the resin Particle absorption, keep the horizontal mixer at a constant temperature of 40-50°C during the stirring process. At the same time, the measured EVA resin (melt flow rate is 20g / 10min, light transmittance> 86%, volume resistivity ≥ 1.0×10 14 , melting temperature is 54°C, VA content 25%) into the ...

Embodiment 3

[0029] (1) Add the measured PTW resin (acrylate content 25.5%, melting point 73°C, melt index 12g / 10min) into the first horizontal mixer; The mixed liquid of agent, co-crosslinking agent, coupling agent, ultraviolet stabilizer, ultraviolet absorber and antioxidant is evenly sprayed into the resin particles through the liquid spraying device, stirring while spraying, stirring speed 5r / min, metered spraying 10min, keep the constant temperature of the horizontal mixer at 40-50°C during the spraying process; after the spraying, increase the stirring speed to 15r / min, first rotate forward and stir for 15min, then reversely stir for 15min, so that the liquid mixing aid is completely covered by the resin Particle absorption, keep the horizontal mixer at a constant temperature of 40-50°C during the stirring process. At the same time, the measured EVA resin (melt flow rate is 20g / 10min, light transmittance> 86%, volume resistivity ≥ 1.0×10 14 , melting temperature is 54°C, VA content ...

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Abstract

The invention relates to the technical field of packaging adhesive films for solar photovoltaic modules, in particular to a double-layer co-extrusion anti-polarization type EVA (ethylene-vinyl-acetate) composite adhesive film. The double-layer co-extrusion anti-polarization type EVA composite adhesive film comprises a copolymer resin anti-polarization layer and an EVA resin layer which are arranged from top to bottom in sequence, wherein the copolymer resin anti-polarization layer and the EVA resin layer are formed by double-layer co-extrusion. With the adoption of the structure and a method,the problems of bubbles, no melting and piece combination in a laminating process of the photovoltaic modules can be solved, the PID problem of the modules can also be solved, so that the packaging yield of the modules is increased, the PID risk of a photovoltaic power station is reduced, and besides, the preparation method has a simple and practical process and quite high industrial production value.

Description

technical field [0001] The invention relates to the technical field of packaging adhesive films for solar photovoltaic modules, in particular to a double-layer co-extrusion anti-polarization EVA composite adhesive film and a preparation method thereof. Background technique [0002] The traditional packaging film for solar photovoltaic modules is mainly ethylene-vinyl acetate copolymer (EVA) film, and the VA (vinyl acetate) content in the film needs to be greater than 25%. Since EVA is a polar resin, it has good compatibility with polar additives, and it is not easy to produce bubbles, unfused and laminated problems during component lamination. However, during the power generation process of the solar photovoltaic module, a negative voltage will be generated through the outer frame, which will cause the sodium ions and potassium ions in the glass to pass through the adhesive film layer to reach the surface of the battery sheet, and accumulate on the surface of the battery she...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/20B32B27/30B32B33/00B29C48/18B29C48/08H01L31/048
CPCB32B27/08B32B27/306B32B27/308B32B27/20B32B33/00H01L31/0481B29C48/08B29C48/18B32B2250/02B32B2250/24B32B2270/00B32B2307/714B32B2457/12Y02E10/50
Inventor 金旭张刚黄宝玉乔刚童伟吕松
Owner CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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