Dutch materials specialist DSM launched a new polyolefin-based backsheet that is claimed to have outstanding UV and abrasion resistance as well as good moisture barrier and hydrolysis resistance.
The solar manufacturer will expand its annual encapsulant manufacturing capacity by 1.35 GW and backsheet production by 1 GW.
Backsheet manufacturer Tomark-Worthen LLC has developed a new polyamide backsheet under the U.S. Department of Energy’s Sunshot initiative. The product is based on a novel polyamide-ionomer alloy created by U.S. chemicals producer Dow. The alloy, as well as the other materials in the backsheet, are stabilized with a UV/anti-oxidant package that slows down the damaging effects of ultraviolet radiation. The manufacturer claims that the backsheet is 25-30% more affordable than high-efficiency fluoropolymer products.
Five testing laboratories led by Germany’s Fraunhofer ISE have begun a ‘round robin’ project to test the effects of ultraviolet light on polymer backsheet materials. Initial results indicate a route to accurate accelerated testing of backsheet UV stability over module lifetimes of 20 years-plus.
A U.S. research team has discovered that backsheets are most affected by cracking and degradation on inner layers, as such areas tend to become more rigid. The scientists have also discovered that degradation is accelerated by chemicals descending from the solar cells’ EVA encapsulant to the backsheets themselves.
This year JinkoSolar launched its bifacial Swan module, one of the first to feature a transparent Tedlar backsheet made by DuPont. pv magazine had the chance to catch up with Gener Miao, JinkoSolar VP for global sales and marketing for an update on the module’s innovations, and on how the company sees solar markets this year.
India’s Directorate General of Foreign Trade (DGTR) has concluded that duties ranging from $537 to $1,559/metric ton will be needed to offset the impact of imports of solar ethylene vinyl acetate (EVA) sheets from China, Malaysia, Saudi Arabia and Thailand. The harshest duty — $1,559/metric ton (MT) — has been imposed on sheets supplied by all Saudi manufacturers other than Saudi Specialized Products.
Dutch materials specialist DSM developed its Endurance backsheet to offer reliable long-term performance in the harshest climates where solar is being deployed. The backsheet utilizes a unique combination of materials, put together in a coextrusion process which eliminates the potential for delamination.
At pv magazine’s 9th Quality Roundtable, held last month in Germany, a host of experts debated pressing quality issues, from LID in PERC modules, to hailstorm damage and faulty backsheets. In a video interview, Stephan Padlewski of DuPont goes into more detail about the quality debate, and how it has developed over the past years. He also discusses DuPont’s testing regime.
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