Because there is a large variety of different
polyurethane materials that areexcellent for specific applications, the right polyurethane for the
particularapplication has to be selected. The type of polyurethane that is used has to bechemically stable
and easy enough to process without giving large batch-tobatchvariations that may cause service life problems.
The application conditionsmay change greatly from those originally specified after several yearsof use,
potentially causing changes to the service life.