TABLE OF CONTENTS These materials are usually rotomoulded in the form of plastisols: however, powdered grades are available. The plastisols are dispersions of PVC in other compounding ingredients such as plasticisers, stabilisers, fillers and pigments. A major advantage of PVC is that it has a wide range of flexibilities depending on the ingredients of the plastisol see Figure 4.8). This material is widely used to manufacture flexible toys. An application is shown in Figure 4.7.
Materials such as polyvinylidene fluoride (PVDF) and ethylene-chlorotrifluorethylene (ECTFE) can be rotomoulded. Although expensive they provide excellent chemical resistance and high temperature capability. They are currently used for chemical vessels or for protective linings.
