Double-chamber vacuum laminator

Vacuum lamination of terrestrial photovoltaic modules is a new production process requiring special equipment and a significant material development effort. Equipment design studies resulted in improved control and lower costs when using a double-chamber vacuum laminator. Application testing of new materials and primers showed the feasibility of two different back sheet materials, one encapsulant, two new primers for polymers and one primer for metals. 

By July 1979 a double-chamber vacuum laminator was developed, tested and put into production Z). This laminator used a proven thermoplastic, polyvinyl butyral (PVB), which requires humidity-and temperature-controlled storage and handling. Other problems with PVB were high cost and high viscosity at the 150°C process temperature. 

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See also in sourсe #XX -- [ ]

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