Polymer primer, applications testing

Table 32.4 displays the adhesion test results for different spray primers applied to T/F plasma-treated bare 7075-T6 alloys. The results demonstrate that this special plasma polymer coating gave rise to excellent water-insensitive adhesion of all three spray primers used in this study Turco solution could not delaminate any of the primers over a period of 24h. In addition, up to 6 days aging of T/F plasma coatings in air prior to primer application did not degrade the excellent adhesion performance of the systems. 

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. 

In order to produce chromate-free plasma coating systems, the adhesion of closed system TMS coatings to nonchromated primers (Spraylat EWAE118 and Dexter lO-PW-22-2) was also investigated, and the adhesion test results are summarized in Table 32.9. Closed system TMS plasma polymers showed superior primer adhesion performance to those obtained from a flow system. Similar to chromated primers, summarized in Table 32.8, excellent primer adhesion was always achieved with closed system TMS plasma polymers treated with subsequent Ar plasma applications. 

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