Versatile, Beautiful, Functional
Polypropylene (PP) is a versatile thermoplastic material, compatible with many processing techniques and used in many commercial applications.
PP is available in a wide variety of melt flow rates, ranging from 0.3 to over 1000 g/10 min, and it is easily recyclable. It can be processed by all methods, including injection molding, blow molding, extrusion, blown, cast film, and thermoforming.
At Milliken, we’ve created advanced additive technologies, including clarifying agents, nucleating agents, and reinforcing agents, that enhance the natural properties of polypropylene, making it clearer, stronger, and more versatile for use in everyday products.
Advantages of Polypropylene
- Low density, reducing environmental impact
- Chemical and thermal resistance
- Fully recyclable
- Excellent moisture and oxygen barrier
- Hot fill and retort capable
Applications of Polypropylene
- Automotive equipment
- Caps and closures
- Consumer goods
- Houseware parts
- Garden furniture
- Storage containers
Leading the Way in Sustainability
PP, together with PE, consumes the least amount of energy during production and produces the lowest carbon dioxide emissions when compared to other plastics. Its lower density also means that switching to PP reduces the absolute amount of waste. Parts made from PP can be recycled multiple times in a wide variety of applications before incineration is necessary. When that time comes, it is possible to recover more energy from PP during incineration than from any other comparable plastic. It also flows more easily as it degrades, without cross linking, gel forming or off-gassing.
Both Starbucks and McDonald's have switched to polypropylene cold cups rather than polyethylene terephthalate (PET), using less plastic and lowering their greenhouse gas emissions.
Quick Facts on the Sustainability of Polypropylene
- Polypropylene produces less solid waste by weight than PET, PS or PVC
- Polypropylene can be recycled into many applications, including battery cases, paint cans, home storage, flower pots, pallets, crates, composite lumber, and more
- 44 out of 51 the largest US municipalities by state collect polypropylene
- Polypropylene and high-density polyethylene (HDPE) produce significantly less CO2 equivalents by weight than PET, PS, and PVC
Polypropylene parts can be 100% recycled into many applications. There is an existing market for recycled PP (rPP) in a very wide range of products such as automotive applications, buckets, caps and closures, garden furniture, pallets, pipes, and more.
Learn more about our performance additives for polypropylene >