Why is polypropylene used so often and what are the different types?

Polypropylene is used in both domestic and industrial applications, and its unique properties and ability to adapt to a variety of manufacturing techniques make it a valuable material for a wide range of uses. Another invaluable feature is that polypropylene can be used both as a plastic material and as a fiber (as in promotional tote bags given at events, competitions, etc.). Polypropylene's unique ability to be manufactured through different methods and for different applications meant it quickly began to challenge many older alternative materials, especially in the packaging, fiber and injection molding industries. Its growth has continued over the years and it still maintains a significant position in the global plastics industry.

   What are the different types of polypropylene?

   There are two main types of polypropylene: homopolymers and copolymers.

  Copolymers are further divided into block copolymers and random copolymers. Each category is more suitable for certain applications than the others. Polypropylene is often referred to as the "steel" of the plastics industry because it can be modified or tailored in various ways to better suit specific uses. This is usually made by introducing special additives to it or in a very special way. This adaptability is an important characteristic.

  Homopolymer polypropylene is a general-purpose grade. You can think of this as the default state of polypropylene material. Block copolymer polypropylene has comonomer units arranged in blocks (ie arranged in a regular pattern) and contains 5% to 15% ethylene. Ethylene improves certain properties, such as impact resistance, while other additives enhance others. Random copolymer polypropylene - as opposed to block copolymer polypropylene - has comonomer units arranged in an irregular or random pattern along the polypropylene molecule. They typically contain 1% to 7% ethylene and are suitable for applications requiring more ductile, cleaner products.