With the progress of science and technology and the improvement of environmental awareness, solar energy, as a clean and renewable energy source, has attracted more and more attention and attention. As an important part of solar cells, solar backsheets have also attracted increasing attention from researchers and enterprises. According to the GB T 31034 standard, the tensile strength, elongation at break and peel strength of the solar backsheet are introduced in detail.
Recommended instrument: Ett-Am electronic tensile testing machine
1. Tensile strength and elongation at break.
Press GB T 135422-2009 Chapter 11. The length of the specimen is 200 mm, the width is (15 1) mm, and 5 are taken in the transverse and longitudinal directions. The measurement accuracy of the specimen width is not less than 01 mm。Two marking lines at least 50 mm apart are marked in the middle of the specimen, and the load is applied at a tensile speed of 100 mm min until the failure of a single component of the specimen is the end point. The median of the 5 test values in landscape and portrait orientation was taken as the result, respectively, and the minimum value was reported.
Solar Backsheet Tensile Strength Tester Solar Backsheet Elongation at Break Tester
Second, the EVA peel strength of the back plate.
According to GB T 2790-1995. Cut the specimen to a width (10
3. Backplate silicone peel strength.
Two 200 mmx15 mm backplates were taken and the specified silica gel was evenly spread on one backplate specimen.
Note: For the melt bonded backsheet, the backplate can be laminated at 145C for 20min before the test.
Fourth, the interlayer peel strength [composite type (including melt bonding type)].
According to GB T 2790-1995. The length of the specimen is 200 mm, the width is (15 1) mm, and 5 are taken in the transverse and longitudinal directions. The accuracy of the specimen width is not less than 0At 1 mm, the specimen tore a layer of the composite material along the length direction, and the peel test was performed at an angle of 180° at a peel speed of 100 mm min, as shown in Figure 1. The median of the 5 test values in the horizontal and vertical directions was taken as the results and reported.
Solar backsheet interlayer peel strength tester
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Overall, solar backsheets are an integral part of solar cells. With the continuous development of the solar energy industry, the research and application of solar backsheets will continue to deepen and improve. We believe that in the near future, more efficient, environmentally friendly and durable solar backsheets will emerge to make greater contributions to the sustainable development of mankind.