Product Briefing Outline: Bluestar Silicones has introduced a new range of high performance adhesives. ‘CAF 530’ optimizes the longevity performance of solar modules by extending their resistance to weather erosion under conditions where performance must be constant for at least 25 years.
Problem: Long-term sticking and sealing of the solar module is required to provide long-life protection of the photovoltaic cells and associated connections against humidity, the main cause of efficiency troughs in modules over time.
Solution: Bluestar Silicones CAF 530 adhesive has a very high degree of elasticity, which resists and absorbs differential dilations of the assembled materials. This new range includes mono and bi-component silicone elastomers (RTV 1 & 2) designed for sticking and sealing the frame and junction box as well as bi-component products designed for the encapsulation of components in the junction box and of photovoltaic cells. CAF adhesives are room temperature vulcanizing (RTV-1) silicone elastomers which cure at room temperature as soon as the product comes into contact with atmospheric moisture. The cure rate also increases with temperature and ambient moisture level.
Applications: Sealing and bonding of PV Junction box and general module applications, including thermal solar panels. Quick curing, high mechanical properties, self-adhesion of metal & plastics and is non corrosive.
Platform: Bluestar Silicones has performed ageing test according to IEC 61215 in order to check the bonding properties of the CAF adhesives on PVF and also on composite PVDF/PET composite materials for 1000 hours at 85°C with 85% relative humidity, which is the damp heat test. The thermal cycle test is less aggressive for the silicone performances than the damp heat test, as it’s only a variation in temperature from – 40°C to + 85°C. Lap shear tests are carried out in order to measure the lap shear strength and the cohesion failure.
Availability: March 2010 onwards.