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Polypropylene (PP) is the second most widely used plastic in the world. It is a thermoplastic polymer resin with a semi-crystalline structure. Given its durability and outstanding characteristics, PP has spread throughout different industries.

Given its durability and the possibility to melt and reform into plastic pellets, PP is both reusable and recyclable for producing new goods. This triggers the material’s desirability, especially for the increasing environmental concerns in the plastic industry. PP is known for being a versatile and durable thermoplastic that is lightweight and extremely rugged. Depending on the polymerization process used to create it, different properties and textures can be achieved. Here are some of its benefits:

  1. Tensile strength: Despite being lightweight, the material is capable of withstanding heavy loads.

  2. Elasticity and toughness: PP is regarded as a tough material because it can deform without breaking. It’s also very flexible, which makes it easy to mold in different shapes and ensures that it can take significant damage prior to breaking.

  3. Fatigue resistance: This property is exactly why your shampoo lid is made from PP! Polypropylene retains its shape after being bent or subjected to torsion. This makes it suitable for living hinges.

  4. Water resistance: PP is highly impermeable. This property is essential for total immersion applications in medical and industrial applications.

  5. Transmissivity: When having a biaxial orientation, high transmissivity can be obtained. Aesthetics or transfer of light require this property.

  6. Low cost: This makes it available to a wide range of users.

  7. High melting point: When compared to other plastics available in the market, PP's high melting point makes it an excellent option for food appliances (containers, kitchen utensils) where high temperatures are required, as a well as laboratory appliances.

  8. Allows for the addition of colors: This process does not degrade the properties of the plastic (dying process).

  9. Biological resistance: It does not mold or deteriorate by biological factors, such as bacteria or fungi (in the short term).

  10. Insulation: Given its high resistance to electricity it is commonly used in electronic components.

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