Polypropylene for rotomoulding
Polypropylene (PP) is a thermoplastic polymer. It is a popular choice in rotomoulding due to its many advantages. Polypropylene (PP) and polyethylene (PE) have some key differences. PP has a higher melting point than PE. PP also has a higher stiffness and is less permeable than PE. PP is also lightweight, which makes it easy to transport and handle. PE is better for applications that require impact resistance and cost-effectiveness, PP is very suitable for applications that require stiffness and high-heat resistance.
High service temperature
One of the main advantages of PP over PE in rotomoulding is its higher stiffness. This makes PP more suitable for creating products that need to maintain a specific shape under load whilst keeping weight low. Another advantage is its higher melting point. PP has a melting point of around 150°C, while PE has a melting point of around 125°C. This makes PP more suitable for high-heat applications, such as products that will be exposed to high temperatures or hot liquids. At temperatures below 0 °C though, PE will show a better impact resistance then PP.
Like PE, PP also has a good chemical resistance with an excellent ESCR, making it resistant to many acids, alkalis, and solvents. This makes it suitable for use in a wide range of applications. Other benefits of PP are the higher hardness and better abrasion and scratch resistance compared to polyethylene.
The product range of PP in rotomoulding
The product range of PP in rotomoulding is vast, from tanks to underground sewage systems and from automotive parts to devices that can be sterilized. Polypropylene is used in rotomoulding because of its high stiffness, chemical resistance, lightweight, and high service temperature. Do you have an idea for a polypropylene product? Share it with us to discover how your product can benefit from the potential of PP in rotomoulding.