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Low temperature super-fast setting EVA (Ethylene Vinyl Acetate) coating

An ultra-fast, adhesive film technology, used in adhesives, film/sheet adhesives, non-polymer organic compound adhesives, etc. The aging resistance deteriorates and other problems, to achieve the effect of improving the crosslinking rate, taking into account the efficiency and process adaptability

Active Publication Date: 2013-04-17
JIANGSU LUSHAN PHOTOVOLTAIC TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of EVA's own structure, only the hydrogen atom on the methyl group at the end of the main chain or side chain is more active, and it is easier to cause crosslinking. The limitation has a greater impact on the crosslinking rate, and the amount of peroxide added is too high. Too much or high processing temperature will make the aging resistance of the material worse, and at the same time, the lamination is easy to foam
There are obvious defects in these two methods. Increasing the lamination temperature will increase the production energy consumption and also increase the production risks such as positioning tape bubbling and cell displacement; increasing the amount of crosslinking agent in the EVA film will lead to peroxidation. Too much residue will seriously affect the aging resistance of the product, and will also increase the probability of problems such as air bubbles, lack of glue, and yellowing of the solder strip.

Method used

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  • Low temperature super-fast setting EVA (Ethylene Vinyl Acetate) coating
  • Low temperature super-fast setting EVA (Ethylene Vinyl Acetate) coating
  • Low temperature super-fast setting EVA (Ethylene Vinyl Acetate) coating

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 0.1 mass parts of 1,1-di-tert-butylperoxycyclohexane (rapid initiator) to 100 mass parts of EVA raw materials with a mass content of 33% vinyl acetate and a melt index of 40 g / 10min, 1.0 mass parts tert-butylperoxycarbonate-2-ethylhexyl (slow crosslinking agent), 0.1 parts by mass of N,N'-m-phenylene bismaleimide (active monomer), 0.3 parts by mass of Tris(2,4-di-tert-butylphenyl)phosphite (antiaging agent), 0.4 parts by mass of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole (ultraviolet absorber ), 0.2 parts by mass of bis-2,2,6,6-tetramethylpiperidinol sebacate (light stabilizer), 0.2 parts by mass of vinyltrimethoxysilane (tackifier), after mixing The feeder mixes evenly, puts it into the casting machine, and at 80°C, it is plasticized, extruded, stretched, drawn, and rolled to make an EVA film with a thickness of about 0.45mm.

Embodiment 2

[0033]In 100 parts by mass of vinyl acetate, the mass content is 33%, and the melt index is the EVA raw material of 40g / 10min. tert-butylperoxycarbonate-2-ethylhexyl (slow crosslinking agent), 0.3 parts by mass of N,N'-m-phenylene bismaleimide (active monomer), 0.05 parts by mass of (2,4-di-tert-butylphenyl) phosphite (antiaging agent), 0.5 parts by mass of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole (ultraviolet light absorber) , 0.1 parts by mass of bis-2,2,6,6-tetramethylpiperidinol sebacate (light stabilizer), 0.1 parts by mass of vinyltrimethoxysilane (tackifier), after mixing The machine mixes evenly, puts it into the tape casting machine, and at 80°C, it is made into an EVA film with a thickness of about 0.45mm after plasticizing, extruding, stretching, pulling, and winding.

Embodiment 3

[0035] Add 0.5 mass parts of 1,1-di-tert-butylperoxycyclohexane (fast initiator) to 100 mass parts of EVA raw materials with a mass content of 28% vinyl acetate and a melt index of 15g / 10min, 1.0 mass parts 2,5-di-tert-butylperoxy-2,5-dimethylhexane (slow crosslinking agent), 1.0 parts by mass of N,N'-m-phenylene bismaleimide (active mono body), 0.5 parts by mass of tris(2,4-di-tert-butylphenyl) phosphite (antiaging agent), 0.1 parts by mass of 2-(2'-hydroxy-5'-methylphenyl)benzo Triazole (ultraviolet absorber), 0.5 parts by mass of bis-2,2,6,6-tetramethylpiperidinol sebacate (light stabilizer), 1.0 parts by mass of vinyltrimethoxysilane ( Tackifier), mixed evenly by a mixer, put into a casting machine, at 80 ℃, plasticized extrusion, stretching, traction, winding to make an EVA film with a thickness of about 0.45mm.

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Abstract

The invention discloses a low temperature super-fast setting EVA (Ethylene Vinyl Acetate) coating which comprises the following components in parts by weight: 100 parts of EVA copolymer, 0.1-0.5 part of initiator, 0.1-1.5 parts of cross-linking agent, 0.1-1.0 part of grafting monomer, 0.05-0.5 part of antiager, 0.1-0.5 part of ultraviolet absorber, 0.1-0.5 part of optical stabilizer and 0.1-1.0 part of tackifier. According to the EVA coating provided by the invention, the packaging efficiency of an assembly can be improved to a greater extent, the stability of assembly production is ensured, and meanwhile, the laminating temperature does not need to be raised and excessive cross-linking agent does not need to be added.

Description

technical field [0001] The invention relates to an EVA adhesive film, in particular to a low-temperature ultra-fast curing EVA adhesive film, which is mainly used in the technical field of photovoltaic module packaging, and can also be used in the technical field of safety glass or other adhesives. Background technique [0002] In recent years, due to problems such as global warming, deterioration of the ecological environment, and shortage of conventional energy, the development of renewable energy has received attention and support from governments around the world. Driven by technological progress and incentive policies of various governments, the solar photovoltaic power generation industry and market have developed rapidly. During the period from 2001 to 2008, the new global photovoltaic power generation capacity continued to grow rapidly, with an average annual growth rate of 50.2%. In 2008, the global new photovoltaic power generation capacity was 5.95GW, an increase ...

Claims

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Application Information

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IPC IPC(8): C09J4/02C09J4/06C09J7/00C09J11/06C08J3/24C08L23/08H01L31/048
CPCY02E10/50
Inventor 余鹏李伟博唐舫成汪加胜李文革
Owner JIANGSU LUSHAN PHOTOVOLTAIC TECH
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