Workshops in Temperature and Humidity

A low temperature (less than 10°C) and a high humidity (higher than 80%) causes condensation of humidity on the surface of the parts to be bonded or at the surface of the adhesive film, and this may forbid a good bond, because the condensed humidity may be deposited between the materials or on the glue line. 

Therefore, the workshops should be conditioned in temperature (from 15 to 30°C) and in humidity (preferably between 30 and 65% RH). Very hot and humid countries require special formulations, probably with different solvents for instance, adhesives used in South China in summer (which is very hot and very humid with perhaps 95% RH and 35°C) may need to be reformulated to match these special conditions. 

Dust and pollution must be eliminated. It is very important to refrain from using oils, greases and silicones near the bonding area because these products could jeopardise the adhesion. 

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