Polypropylene (PP) is a thermoplastic polymer that is used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene. Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar. Its properties are similar to polyethylene, but it is slightly harder and more heat-resistant. Here are some key points about polypropylene:
- Polypropylene is the second-most widely produced commodity plastic after polyethylene.
- Polypropylene is classified as a “thermoplastic” material, which means that it becomes liquid at its melting point, roughly 130 degrees Celsius.
- Polypropylene is used in both household and industrial applications, including packaging, textiles, healthcare, pipes, automotive, and electrical applications.
- Polypropylene fabric is a nonwoven textile that is made directly from a material without any need for spinning or weaving. It is commonly used in clothing applications in which moisture transfer is desired.
- Polypropylene is considered one of the safer plastics and is FDA-approved for food contact. It is used in food containers like those that hold yogurt, cream cheese, and butter products, and in packaging of food that can be heated in a microwave.
In summary, polypropylene is a versatile and widely used thermoplastic polymer that is used in a variety of applications due to its unique properties.
