6. Thermoplastic PU polyurethane adhesives

6.1 Solvent-based adhesives, based on flexible non-reactive polyurethanes

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...