By choosing the right PUD raw material , you can now actually adjust the activation temperature to your process.
The various Polyurethane dispersions are available in the market which are designed to suit different activation temperatures. They differ primarily in their polymer softening characteristics, which can be described by, for example, tack-life measurement (Figure 1) or by a TMA analysis (Figure 2).
Fig 1: PUD types of products tack-life
Fig 2: Thermomechanical analysis of various PUD types of products
Some standard gradesare suitable for most heat-activated applications because of their ideal property profile.
The extended range in the market offers the adhesives
formulator the chance to find the ideal product for a special application or for particular activation conditions. Some products are particularly suitable for heat-activated bonding at high application temperatures because of their special physical polymer properties, while some are ideal for low application temperatures, for example on heat-sensitive substrates.
Some standard grades are suitable for most heat-activated applications because of their ideal property profile. 
