Adhesion Test The good adhesion of silicone sealant to the frame and back sheet is conductive to improve the service life of solar modules. However, the materials of solar back sheet include TPT, TPE, BBF, APE, and EVA.
As far as the problems of silicone sealant applied in photovoltaic modules are concerned, the most common ones, bubbling and poor bonding are directly related to the service life of products, and excessive curing time will weaken the production flow efficiency. Bubble problem
Among these, solar cells are the core components of the solar photovoltaic power generation system. As solar cells are thin, brittle, and easy to oxidize, sealants, act as indispensable and critical roles in protecting those precision parts.
These properties make them ideal candidates as encapsulants for photovoltaic modules. Internal evaluations at Dow Corning and with select external partners have shown that very efficient solar cells using silicones as the encapsulant can be assembled and show very good reliability.
Silicone sealant is generally cured by absorbing moisture in the air. The curing speed is mainly related to the temperature and humidity of the environment. The curing time of silicone sealant can be shortened by increasing the temperature and humidity. Poor adhesion between sealant and back sheet
Silicones can also be used for the assembly of solar collectors, e.g. for bonding the front glass to the frame structure. WACKER silicone rubber grades are ideal for bonding the PV laminate, usually comprising a front glass, encapsulation films in front of and behind the solar cells, and a back-sheet, to the aluminum frame.