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Problems solved by technology
[0016] However, such a thin film generally has a thickness of several tens of μm, so the cost becomes higher compared with the above-mentioned easy-bonding treatment
Method used
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Embodiment 1
[0243] Using sample 1 for adhesive force evaluation, the adhesiveness of the adhesive layer to the EVA film and the adhesiveness of the heat and humidity resistance test (after 500 hours, after 1000 hours, and after 2000 hours) were evaluated by the method described later.
[0244]
[0245] Cut 1 side of the solar cell back protection sheet of sample 1 for adhesive strength evaluation into a width of 15 mm with a cutter, and measure the gap between the adhesive layer formed on the solar cell back protection sheet 1 and the EVA film as a sealant. of adhesion. In the measurement, a 180-degree peel test was performed at a load speed of 100 mm / min using a tensile testing machine. The obtained measured values were evaluated as follows.
[0246] ◎: 50N / 15mm or more
[0247] ○: More than 30N / 15mm to less than 50N / 15mm
[0248] △: More than 10N / 15mm to less than 30N / 15mm
[0249] ×: Less than 10N / 15mm
[0250]
[0251] Under the environmental conditions of a temperature of ...
Embodiment 2 to 16
[0252] [Examples 2 to 16], [Comparative Examples 1 to 10]
[0253] In the same manner as in Example 1, the adhesiveness of the adhesive layer to the EVA film and the adhesiveness after the heat-and-moisture resistance test were evaluated using samples 2 to 26 for adhesive strength evaluation.
Embodiment 17
[0268]
[0269] White plate glass...solar cell front protection material (I)
[0270] EVA film...Sealant on light-receiving side (II)
[0271] Polycrystalline silicon solar cell element...solar cell (III)
[0272] EVA film...Sealant on the non-light-receiving side (IV)
[0273] Lay the above (I)-(IV) and the solar cell back protection sheet 1 in order so that the adhesive layer of the solar cell back protection sheet 1 is in contact with the sealant (IV) on the non-light-receiving side, and then put in vacuum lamination Machine, vacuum exhaust at about 1 Torr, apply atmospheric pressure as the pressing pressure, heat at 150°C for 30 minutes, and then heat at 150°C for 30 minutes to make a 10cm×10cm square Solar cell module 1 for photoelectric conversion efficiency evaluation.
[0274]
[0275] The solar cell output of the obtained solar cell module 1 was measured, and the photoelectric conversion efficiency was measured using a solar simulator (manufactured by Hideo Sei...
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PUM
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Measurement
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Abstract
Disclosed is a highly-adhesive agent for a solar-cell back-side protective sheet. Said highly-adhesive agent overcomes hitherto existing problems and exhibits excellent adhesiveness and adhesion durability. Also disclosed are a solar-cell back-side protective sheet and a solar cell module using said solar-cell back-side protective sheet. The disclosed highly-adhesive agent exhibits a specific glass transition temperature, number-average molecular weight, and hydroxyl number, and contains, in a specific ratio: a (meth)acrylic copolymer (A) that has a specific proportion of carbon-carbon double bonds in side chains; and a polyisocyanate compound (B).
Description
technical field [0001] The present invention relates to an adhesive for a solar cell back protection sheet, and more specifically, to an adhesive for a solar cell back protection sheet excellent in adhesiveness and adhesion durability. Furthermore, the present invention relates to a solar cell back protection sheet produced by using the adhesive for the solar cell back protection sheet, and further relates to a solar cell module produced by using the sheet. Background technique [0002] In recent years, due to the increasing awareness of environmental issues, solar cells have attracted attention as a non-environmentally polluting and clean energy source. From the aspect of using solar energy as a useful energy resource, great progress has been made in practical application through intensive research. [0003] There are various forms of solar cell elements, and as representative ones, crystalline silicon solar cell elements, polycrystalline silicon solar cell elements, amorph...
Claims
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