Which adhesives are available?
- Water-based dispersion adhesives
- Solvent adhesives
- UV-curing adhesives
What requirements must the adhesives meet?
- Chemical resistance
- High temperature
- Food fastness
- Toy fastness
What do "pot life" and "open time" mean?
Pot life is the amount of time remaining after mixing a 2-component system until the chemical reaction of curing begins. If the pot life has elapsed and the adhesive is still being used, it may result in poor quality because the adhesive will not find sufficient adhesion to the substrate.
The open time is the time used for flocking, during which, the flock fibres previously charged in the electric field, can be shot into the adhesive layer. Once the open time of an adhesive has expired, its surface begins to form a skin that prevents the flock fibres from anchoring properly. This results in a sparse flock pattern (insufficient density of flock fibres on the substrate).
How does drying work?
Depending on the adhesive used, drying can be carried out, for example, at room temperature or in an oven. During this process, the volatile components, such as solvents or water, are evaporated.
However, there are adhesives that only reach their resistance at elevated temperatures during the drying process. Here, the influence of heat over a certain period of time triggers a chemical reaction that cures the adhesive.
The manufacturers issue a so-called "technical data sheet" which details the adhesives required technical parameters, and also includes the correct drying method