Composite packaging adhesive film for solar packaging material and preparation method of composite packaging adhesive film

A solar encapsulation and encapsulation film technology, applied in the direction of adhesives, adhesive additives, film/sheet adhesives, etc., can solve the problems of air bubbles and low gel content in the cured film, and achieve a uniform and perfect cross-linked network , to achieve the effect of cross-linking curing efficiency and expanding the activation range

Active Publication Date: 2019-02-01
JIANGSU LUSHAN PHOTOVOLTAIC TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies in the prior art, one of the purposes of the present invention is to provide a composite encapsulation adhesive film for solar encapsulation materials, which solves the problems of low bubbles and gel content in the cured film, and has good light transmittance, The characteristics of high strength glass

Method used

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  • Composite packaging adhesive film for solar packaging material and preparation method of composite packaging adhesive film
  • Composite packaging adhesive film for solar packaging material and preparation method of composite packaging adhesive film
  • Composite packaging adhesive film for solar packaging material and preparation method of composite packaging adhesive film

Examples

Experimental program
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Effect test

preparation example Construction

[0043] A preparation method for a composite encapsulation adhesive film for solar encapsulation materials, comprising:

[0044] Melt extrusion steps of POE resin: Mix the POE resin, crosslinking agent, co-crosslinking agent, ultraviolet absorber, antioxidant, and tackifier in the formula to obtain a POE compound; then put the POE compound into the second A single-screw extruder melts and extrudes to obtain POE molten material;

[0045] The melt extrusion step of EVA resin: mix the EVA resin, composite cross-linking agent, auxiliary cross-linking agent, ultraviolet absorber, antioxidant and tackifier uniformly to obtain the EVA compound; then put the EVA compound into The second single-screw extruder melts and extrudes to obtain the EVA molten material;

[0046] Co-extrusion step: transport POE molten material and EVA molten material to the co-extrusion die, the distributor at the entrance of the die distributes the EVA molten material to the upper layer to form an EVA film la...

Embodiment 1

[0087] The cross-linking agent in the EVA mixture formula in comparative example 3 is replaced by a composite cross-linking agent, and the composite cross-linking agent is made of tert-butyl peroxycarbonate-2-ethylhexyl and N-methyldiallyl A mixture of base amines, the mass ratio of the two: tert-butyl peroxycarbonate-2-ethylhexyl:N-methyldiallylamine=5 / 1. Other components and consumption are identical with comparative example 3. According to the method and conditions described in Comparative Example 3, an EVA / POE cured film and a small component were prepared.

[0088] The laminated cured films and small components prepared in Comparative Example 1, Comparative Example 2, Comparative Example 3, Comparative Example 4 and Example 1 were analyzed and tested, and the results are shown in Table 4.

[0089] Table 4 comparative example 1, 2, 3, 4 and embodiment 1 make the performance of cured film and small assembly

[0090]

[0091]

[0092] Note: In comparative examples 3,...

Embodiment 2

[0095] The cross-linking agent in the EVA mixture formula in comparative example 3 is replaced by a composite cross-linking agent, and the composite cross-linking agent is made of tert-butyl peroxycarbonate-2-ethylhexyl and N-methyldiallyl A mixture of base amines, the mass ratio of the two is: tert-butyl peroxycarbonate-2-ethylhexyl:N-methyldiallylamine=5 / 1. The dosage (parts by weight) of the composite crosslinking agent is adjusted to: (1) 0.4 parts; (2) 0.5 parts; (3) 1 part; (4) 1.6 parts; (5) 1.7 parts. Other components and consumption are identical with comparative example 3. According to the method and conditions described in Comparative Example 3, an EVA / POE cured film and a small component were prepared.

[0096] The laminated cured film and small components prepared with different dosages of the composite crosslinking agent in Example 2 were tested, and the results are shown in Table 5.

[0097] Table 5 The performance of the cured film and small components made b...

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Abstract

The invention discloses a composite packaging adhesive film for a solar packaging material. The composite packaging adhesive film is composed of an ethylene vinyl acetate (EVA) adhesive film layer anda polyolefin elastomer (POE) adhesive film layer, and the EVA adhesive film layer is prepared from the following raw materials in parts by weight: 100 parts of EVA resin, 0.5-1.6 parts of a compositecross-linking agent, 0.5-1 part of a co-crosslinking agent, 0.05-0.2 part of an ultraviolet absorbent, 0.03-0.1 part of an antioxidant and 0.1-0.5 part of a tackifier, wherein the composite cross-linking agent comprises a peroxide and an crosslinking control agent. The invention further discloses a preparation method of the composite packaging adhesive film for the solar packaging material, and the preparation method comprises the following steps: melt extrusion of POE resin, melt extrusion of EVA resin and co-extrusion. According to the composite packaging adhesive film disclosed by the invention, the problems of bubbles and too low gel content of a cured film are solved, and meanwhile, the composite packaging adhesive film has the characteristics of good light transmittance and high glass strength. The preparation method can meet the requirements of process stability, laminating process stability and cross-linking curing efficiency during film preparation by casting at a same time.

Description

technical field [0001] The invention relates to an encapsulating adhesive film, in particular to a composite encapsulating adhesive film for solar encapsulating materials and a preparation method thereof. Background technique [0002] A solar cell is a device that directly converts solar energy into electrical energy, and the use environment of solar cell components is usually exposed to high temperature outdoors. Therefore, in order to prevent the cells from being damaged due to direct contact with the air, two layers of encapsulation film are generally used to sandwich the cells between the tempered glass and the back plate, and they are bonded together by vacuum heating lamination. These two layers of encapsulation film mainly play the role of sealing and protecting the battery sheet, so as to prolong the service life of the entire battery assembly. At present, the industrial packaging film for photovoltaic modules mainly uses ethylene-vinyl acetate (EVA) resin as the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/06C09J7/10C09J7/30
CPCC09J4/06C09J11/06C09J7/10C09J7/30
Inventor 汪加胜陈磊郭森杨同禄唐舫成白文韬
Owner JIANGSU LUSHAN PHOTOVOLTAIC TECH
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