MATERIALSVENDORVIEW
Sticking to the best
Reliable application of adhesives and sealants in solar module production is becoming an ever increasing part of the industry goal of improving output while reducing cost. Wolfgang Merklein, CEO at ViscoTec Asia discusses his company’s approach to the challenges.
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simple. However, these applications when viewed closely have many requirements which will need to be fulfilled to produce a quality component. In principle, solar modules should be easy to install, have little weight and be dependable in the field. This requires resistance to all weather conditions, such as snow, rain, humidity, solar radiation, etc.
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To meet these quality requirements, appropriate adhesives and sealants contribute a key role and have to fulfil the highest quality standards in module manufacturing. The benefits of adhesives and sealants compared with other joining methods in production processes include lightweight and excellent sealing capability. These advantages allow manufacturers the flexibility to customize their operations and also allow the versatility to include many options in their applications.
Complex adhesives
These highly complex materials have been developed for extreme conditions. Solar modules are expected to last for 20 years in the field. The photovoltaic performance must be dependable and all electrical connections must not be compromised. In their life span solar modules are expected to stand up to all environmental conditions. Temperature ranges and fluctuations from -25 to +85° C and intense changes in moisture and humidity must not affect these units.
Because of the complex chemical and physical requirements of the adhesives and sealants used in the manufacturing process the application and dispensing of these
he construction of today’s typical solar modules appears at first glance quite
materials must playa key role. The adhesives and sealants must in fact be dispensed reliably and accurately and guarantee that absolutely no air pockets occur in the sealed areas of the modules. These air pockets can allow moisture to enter the module and thus the lifetime and efficiency of the module decreases rapidly.
It is therefore extremely important to have an appropriate dosing system, which ensures that these materials are precisely dosed and100% process reliable. This is particularly important when the dispensing system is integrated with the full automation and complex features of the modern manufacturing plant.
ViscoTec offers a complete solution for these highly critical solar module dispensing applications. ViscoTec Meter Mix Dispense systems are used in the potting of the control and connection boxes as well as the bonding and sealing of the solar module units themselves. This system is an automated solution for dispensing two-component adhesive or sealant. The static mixed adhesive can be dispensed, for example by using a robot or axis system to produce a uniform sealing bead on the solar module, or as potting of connections boxes.
www.solar-pv-management.com Issue III 2011
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