2.2. Sample preparation
Composite samples were prepared by mixing textile waste with a polyurethane formulation including isocyanate
and forms of polyol. The polyurethane foam was prepared by mixing the polyol and isocyanate at a 1:1.5 ratio at
room temperature of 22÷25°C by a process described bellow.
At the beginning of the study different weight percentage (wt%) of textile waste in polyurethane foam were
established. For this purpose the maximum weight percentage was established. In order to determine the maximum
amount of textile waste that can be added to polyurethane foam, several samples with different textile waste weight
percentage were produced. The weight percentage range of textile waste used varies between 0 and 50 (Table 1). When
textile waste weight percentage is above 50%, the obtained composite material is not homogenous and cannot be handled.