Synthetic lining and cover materials for solar panels
In the manufacture of solar panels, both temporary mounting and durable synthetic materials are used. For example, tedlar - lining non-woven material, EVA - shrinkable cover film, isovoltaik - a set of dual purpose, evasayf - interlayer for the glass.
Tedlar is the commercial name of a material more than 25 years old manufactured by the American firm DuPont, used for antiseptic purposes and has found wide application in recent years as a substrate for the production of solar panels.
Chemically, tedlar is a polyvinyl fluoride (PVP, PVF). Technologically, this is a non-woven fibrous material.
The advantages include high strength, all-weather and resistance to ultraviolet.
EVA is a polyamide film intended for outdoor coating of photovoltaic cells of solar panels. Milky white film cover the panels and fix it on the frame, then heat the film with a heat gun or a hair dryer until it sinks and becomes transparent. Small bubbles burst themselves, if the panel with a film put on a hot day in the sun, covering it with glass.
Tedlar's competitor is also more than 25 years old is a material based on polyamide from the Austrian firm ICOSOLAR. In solar panels, its following properties are used:
- High-strength adhesive film
- Exceptional light reflection
- High resistance to ultraviolet light
According to the firm, the adhesive layer of this material in the test mode continues to work after 3500 hours of wet heat.
By facilitating and strengthening the construction, the persistent light-permeable films are used for laminating and applying glass and various mounting elements.
Also, the thin outer solar panels are hardened, for example, using a duplex based on the interfacial film evassef from Bridgestone. For solar panels, the light-scattering film "daylight" is of interest, it is used in particular for greenhouses. The usual thickness of the films is 0.4 mm. They can be placed between the glasses as for technology of autoclaving, and without warming up.
The Dun-SOLAR TPE sublayer
Dan-solar-TPE from Dunmore (DUNMORE) is a three-layered proprietary lining kit consisting of the top layer of Tedlar (T), the core of polyester (P) and the lower layer of polyethylene (E) or polyethylene terephthalate (not to be confused with top and bottom, sometimes The bottom layer is made gray or black). The meaning of the three-layer is a thickening and relative cheaper liner, in order to increase the electrical safety of the modules giving out up to 1000 V DC.
Also, as an improvised film coating or in combination with it, an optically transparent, colorless compound pentelast 712 (except for the optical features - analogue of pentelast 710) is used. Its usual application is the sealing of cells of solar batteries, photodiodes, envelopes of light guides, shop windows and other.
Foam (4 cm thickness), adhesive tape, fiberboard and other materials that are not adapted, are used for installation as temporary. Without removing them completely, the manufacturer risks reducing the durability of the panels.