What is PP?
PP stands for polypropylene which is virtually unbreakable. Printing with PP involves the challenge that the parts warp quickly after cooling due to the materials molecular structure, which makes it challenging to print PP models well. However, if done correctly, the models have great capabilities with a smooth visually appealing finish.
PP is a semi-crystalline plastic, which is different from the more common amorphous plastics ABS and PLA. This means that PP does not soften gradually as the temperature increases, but rather maintains its form until enough heat has been absorbed and then it liquefies rapidly.
PP is reasonably stiff, lightweight and has a great temperature resistance. PP models are water-resistant and can withstand fatigue due to repeated use.
PP is often used for packaging due to its flexibility and fatigue resistance. It is a great material for storage containers. PP is suitable for caps or lids with living hinges for example, which are often opened and closed.