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A kind of eva film for encapsulating solar photovoltaic modules and preparation method thereof

A solar photovoltaic and module technology, applied in adhesives, electrical components, semiconductor devices, etc., can solve the problems of limited reduction in thermal shrinkage of EVA film internal stress, increased raw material and energy consumption, and inability to achieve results. Simple in-line tempering, reduced stretching effect, low thermal shrinkage effect

Active Publication Date: 2015-10-14
TIANJIN CAIDA NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The EVA film prepared by this invention is made by two-stage calendering, the EVA film can maintain a natural state, will not be deformed due to casting and stretching, and the shrinkage rate of the EVA film is reduced; The calendering process not only increases the floor space, but also increases the consumption of raw materials and energy, and the production efficiency is low. In addition, the elimination of internal stress and the reduction of thermal shrinkage of the EVA film are limited, and the desired effect cannot be achieved.

Method used

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  • A kind of eva film for encapsulating solar photovoltaic modules and preparation method thereof
  • A kind of eva film for encapsulating solar photovoltaic modules and preparation method thereof
  • A kind of eva film for encapsulating solar photovoltaic modules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Prepare materials

[0033] Prepare materials according to the following weight ratio:

[0034]

[0035]

[0036] 2. Mixed material

[0037] Firstly, add all the coupling agent and crosslinking agent in the raw materials into the ethylene-vinyl acetate copolymer according to the above weight ratio, and mix evenly to obtain a primary mixture; secondly, add the antioxidant and light stabilizer in the above raw materials and ultraviolet absorber are all added to the primary mixture, and mixed uniformly to obtain a secondary mixture; finally, the lubricant in the above-mentioned preparation materials is added to the secondary mixture, and the mixture is uniformly prepared;

[0038] 3. Preparation of EVA film

[0039] The prepared mixture is sent to the feeding box of the extruder, and through the heating of the extruder barrel and the rotation of the screw, the mixture is heated, melted and kneaded in the extruder to form a melt; the screw will melt The body is c...

Embodiment 2

[0045] In addition to preparing materials, prepare materials according to the following weight ratio:

[0046]

[0047]

[0048] In the step of preparing the EVA film, the extruder barrel heating temperature is 80°C, the temperature of the mold is 85°C, and the speed of the production line is 3.5 m / min, all the other are the same as in Example 1, and the thickness of the prepared EVA film is It is 0.5mm and the shrinkage rate is 2.8%.

Embodiment 3

[0050] In addition to preparing materials, prepare materials according to the following weight ratio:

[0051]

[0052] In the step of preparing the EVA film, the extruder barrel heating temperature is 85°C, except that the temperature of the mold is 85°C, all the other are the same as in Example 1, the thickness of the prepared EVA film is 0.30mm, and the shrinkage rate is 2.0mm. %.

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Abstract

The invention discloses an EVA film for packaging a solar photovoltaic module and a preparation method thereof. The preparation method comprises the following steps of adding an anti-oxidant, a light stabilizer, an ultraviolet light absorber, a coupling agent, a crosslinking agent and a lubricant into an ethylene-vinyl acetate copolymer, uniformly mixing to obtain a mixture, putting the mixture into an extruder, heating and mixing the mixture in the extruder to obtain melt, extruding the melt by a mold, and carrying out molding treatment to obtain the EVA film. The EVA film has the advantages of small internal stress, low shrinking percentage, fast production line speed, high production efficiency, small land occupation area, and low energy and raw material consumption.

Description

technical field [0001] The invention relates to the field of solar photovoltaic module packaging, in particular to an EVA adhesive film for solar photovoltaic module packaging and a preparation method thereof. Background technique [0002] Solar power generation uses the quantum effect of silicon and other semiconductors to directly convert the visible light of the sun into electrical energy. Since silicon wafers are directly exposed to the atmosphere, their photoelectric conversion functions will attenuate. The thermosetting, elastic adhesive layer that can withstand atmospheric changes encapsulates the silicon wafer group, and is bonded with the upper protective material glass and the lower protective material TPT (polyvinyl fluoride composite film) to form a solar photovoltaic module (that is, a solar cell) plate). [0003] Liquid silicone resin and polyvinyl butyral resin sheet (PVB) have been used as encapsulation adhesive materials in the solar cell industry, but thei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/06B29C47/92H01L31/048B29C48/92
CPCB29C47/0021B29C48/08
Inventor 祁宏伟
Owner TIANJIN CAIDA NEW MATERIALS TECH CO LTD
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