Developed in Italy in 1957 by Giulio Natta, polypropylene (PP) is obtained by the radical polymerisation of propene, a gas obtained from fossil fuels. To process PP various ways are possible, one of them is extrusion. It is an odourless, tasteless, colourless material, appearing both translucent and opaque and can be easily coloured with high gloss surface coatings.
Three forms of polypropylene with different tactics can be obtained from propene:
Isotactic polypropylene is industrially the most interesting and widely used due to its high crystallinity, which gives it better chemical, physical and mechanical properties. As it is not a toxic material, it is particularly suitable for use in the food and pharmaceutical sectors.