The density of the foam was controlled by the amount of air introduced into the latex through mechanical agitation. The dry density of the final product was then determined. The foams were produced with a range of densities to compare their physical properties. Different densities of foam were fabricated to study their properties for different applications
such as cushions, pillows, mattresses and others. The densities of the foams produced
in this study were within the range of
0.06 – 0.07 g/cm3 for the soft foams and between 0.09 – 0.10 g/cm3 for the firm foams.
Determination of gelling pH. After the addition of sodium silicofluoride to the latex foam mix, a glass electrode was placed into the latex foam. A pH meter accurately measured the pH change in the latex during gelation.