DELO, manufacturer of industrial adhesives for the automotive, consumer electronics and semiconductor industries, has expanded its product ranges and now offers adhesives for solar cells. These new light-curing products, made from epoxy resins or acrylates, are well suited for bonding the protective films of thin-film solar cells and can also act as effective barriers against humidity.
Thin-film solar cells are used for façades, lightweight roofs, or charging columns. Made up of several layers, with a thickness in the millimetre range, these solar cells feature active, energy-producing layers that are often vapor-deposited onto glass or an organic carrier material and covered with protective film on the front and back. DELO KATIOBOND LP655 can be used to reliably bond the protective film of the solar cell and also acts as a barrier to protect the active layers from humidity. This is extremely important at the edges, as penetrating humidity would impair the solar cells' functionality.
DELO states the raw materials used in the adhesive allow for a low water vapor transmission rate of 6g per mm/m² in 24-hour period, which has been tested at a temperature of 60°C and a relative humidity of 90%. This prevents premature degradation of the solar cells and contributes to a long lifetime. DELO KATIOBOND LP655 also features high peel resistance on PET, the plastic material typically used for protective films. The transparent product cures in seconds under UV light and has been optimised for slot-die coating.
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