If you’re wondering if there are any distinct differences between HDPE and PP, you’d be right to wonder. The answer is ‘yes’, with a host of differences in terms of density, temperature and UV and chemical resistance.

Density is a key factor that differentiates HDPE from PP. Because HDPE has a lower density, it can be more rigid. Thanks to its lower density, though, PP, can be used when moulding parts with lower weight.

Like HDPE, Polypropylene offers good chemical resistance. UV resistance, though, is poor; if it is stabilised with additives, it can be improved. Resistant to a wealth of solvents, HDPE and PP have a wide variety of applications.