6. Thermoplastic PU polyurethane adhesives
These adhesives come in two forms: solvent-based and aqueous emulsions.
Types DESMOCOLL
Ò
from BAYER, PEARLSTICK
Ò
from Spanish company MERQUINSA... These raw materials are dissolved in fast-evaporating solvents (ethyl acetate, ketones, aliphatic hydrocarbons, etc.).
To use these adhesives, they are coated as a single bond (on only one of the materials to be joined) or as a double bond, part of the solvent is allowed to evaporate, the adhesive film is reactivated by heating (to around 60-90°C), joined and pressed for a few seconds. Contact setting, at a pressure of just...
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Thermoplastic PU polyurethane adhesives