The importance of solar photovoltaic adhesives applications in solar photovoltaic modules
Photovoltaic (PV) adhesives utilize moisture in the air to cure at room temperature，
then providing excellent bonding and sealing properties for solar PV module outer frame and junction box applications.
When manufacturing and assembling PV modules, it is necessary to select adhesives with excellent properties such as:
High light transmission, weatherability, and high adhesion to ensure the quality and long-term stability of PV modules.
The importance of adhesives in PV modules is mainly reflected in the following:
1. Bonding: The various components of a PV module, such as the cell, EVA film, glass, backsheet, etc.,
need to be bonded together. As an important auxiliary material, adhesive can effectively bond these materials
together to form a stable and solid structure.
2. Sealing: Some parts of PV modules, solar cell & EVA film, laminates & frames, junction boxes & backsheets, etc.
need to be sealed in order to prevent the entry of moisture and gas,
So as to maintain their long-term performance and stability.
Adhesive can form a sealing film, play the role of moisture-proof, waterproof, dustproof and so on.
3. Potting: In some cases, in order to protect some sensitive parts of the PV module,
Such as the wires inside the junction box, etc.It is necessary to use adhesives for potting.
This can effectively protect these parts from the influence of the external environment,
thus prolonging the service life of PV modules.
4. Improve efficiency: The efficiency of PV modules not only depends on the quality and performance of the cells,
But also on the structure and design of the entire module.
The selection and use of adhesives can affect the light transmission, sealing and stability of the entire module,
thus improving the efficiency of PV modules.
In photovoltaic modules, there are many layers of adhesives, and there are differences in the varieties.
Application areas include between solar cell & glass, laminate & frame, solar cell & backsheet,
junction box & backsheet, and the potting of the junction box.
Photovoltaic adhesives are mainly organic silicone-based,
supplemented by polyurethane adhesive, epoxy resin adhesive,
but also use a small number of other adhesives.
