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Hot-melt adhesive film for fixing solder strip reflective films

A technology of hot-melt adhesive film and reflective film, which is applied in the field of solar energy, can solve the problems of easy aging and yellowing, decreased electrical conductivity, and weakened battery life, etc., and achieves the reduction of manual operation difficulty, long-term stable performance, and consistent bonding strength Effect

Inactive Publication Date: 2015-04-01
祝根平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Component manufacturers mostly use ordinary glue or ordinary ethylene-vinyl acetate copolymer (EVA) hot melt adhesive. This type of hot melt adhesive mainly has the following problems: (1) The ordinary glue or hot melt adhesive has not been designed for aging resistance, In actual use, aging and yellowing are prone to occur, which accelerates the oxidation of the welding strip, resulting in a decrease in electrical conductivity; the bonding strength of the welding strip and the reflective film of the welding strip has not been tested for aging, and it is prone to delamination and other phenomena, which may accumulate water vapor that may penetrate, further Destroy the structure of the ribbon; (2) Ordinary glue or hot melt glue is easy to overflow the glue on the cell after hot pressing, covering the photoelectric conversion area. This kind of glue without anti-aging design is easy to age and yellow, shielding light from penetrating into At the same time, the acidic substances decomposed after aging and yellowing further catalyze the degradation of the packaged EVA film and the aging and yellowing, which weakens the service life of the battery; Deviating from the surface of the ribbon, blocking the effective area of ​​photoelectric conversion of the cell, resulting in power loss of the module, flaws in the appearance, and serious scrapping of the module

Method used

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  • Hot-melt adhesive film for fixing solder strip reflective films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of hot-melt adhesive film: select polyolefin material, according to the weight percentage, the formula of the hot-melt adhesive film is: polyolefin material 70% ~ 99.9%, tackifier 0.1% ~ 30%, ultraviolet absorption 0.1% to 5% of UV stabilizer, 0.1% to 5% of UV stabilizer, 0.1% to 5% of antioxidant, 0.1% to 5% of crosslinking agent, and 0.1% to 20% of coupling agent;

[0028] (2) Through high temperature extrusion or blown film into a film shape, the extrusion temperature is 50 ℃ ~ 300 ℃, and the thickness is 0.1 μm ~ 30 μm. Figure 1 is a structural schematic diagram of the prepared hot melt adhesive film fixed welding belt reflective film .

Embodiment 2

[0030] After testing, the size of the hot melt adhesive film prepared in Example 1 changes by 1% to 20% under the conditions of 50°C-160°C, pressure 0-1 atmosphere, and time 1-30 minutes.

Embodiment 3

[0032] The hot-melt adhesive film prepared in Example 1 is cross-linked and used under the conditions of 50° C. to 160° C., a pressure of 0 to 1 atmosphere, and a time of 1 to 30 minutes.

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Abstract

The invention relates to a hot-melt adhesive film for fixing solder strip reflective films. The hot-melt adhesive film comprises an ethylene-vinyl acetate copolymer (EVA) and / or a polyolefin material, and the melt index is less than 15 g / minute. The hot-melt adhesive film greatly lowers the flowability of the hot-melt adhesive under universal lamination technological conditions, thereby effectively avoiding the phenomena of adhesive overflow and reflective film shift. Besides, the hot-melt adhesive film is designed according to the tackifying or initial viscosity formula, so the binding force of the hot-melt adhesive film for the solder strip is greater than 2 N / cm. In addition, the hot-melt adhesive film can contain one or more of ultraviolet stabilizer, ultraviolet absorbent and antioxidant, thereby enhancing the aging resistance and preventing the hot-melt adhesive film from aging or yellowing under operating conditions without having adverse influence on other packaging materials in the component environment.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a hot-melt adhesive film for fixing a reflective film of a welding ribbon. Background technique [0002] At present, there is no targeted development of corresponding glue or film for the reflective film of the welding belt to cooperate with it. Component manufacturers mostly use ordinary glue or ordinary ethylene-vinyl acetate copolymer (EVA) hot melt adhesive. This type of hot melt adhesive mainly has the following problems: (1) The ordinary glue or hot melt adhesive has not been designed for aging resistance, In actual use, aging and yellowing are prone to occur, which accelerates the oxidation of the welding strip, resulting in a decrease in electrical conductivity; the bonding strength of the welding strip and the reflective film of the welding strip has not been tested for aging, and it is prone to delamination and other phenomena, which may accumulate water vapor that...

Claims

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Application Information

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IPC IPC(8): C09J7/00C09J123/08C09J123/00C09J11/06H01L31/048
CPCY02E10/50
Inventor 祝根平
Owner 祝根平
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