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What material is PP plastic?

What material is PP plastic?

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PP plastic refers to plastic made of polypropylene (PP for short). Polypropylene is a thermoplastic polymer, a synthetic plastic made by polymerizing propylene monomer. During the polymerization process, the molecular structure of propylene monomers are repeatedly connected to form polymer chains, ultimately forming polypropylene.

PP is a very common and versatile plastic with many excellent properties, such as lightweight, high melting point, chemical resistance, good electrical insulation, etc. Due to these properties, PP is widely used in a variety of applications, including but not limited to packaging materials, fibers, containers, furniture, medical devices, automotive parts, etc. Its thermoplastic properties also allow PP to be shaped through various processing methods, such as blow molding, injection molding, etc., to meet the needs of different shapes and uses.

10mm Polypropylene Sheet

Here are some of the main PP properties:

  • Lightweight: PP is a relatively lightweight plastic with a low density, making it ideal for applications where lightweighting is required.
  • High melting point and thermal stability: PP has a relatively high melting point and is able to maintain stability at high temperatures. This makes it suitable for high temperature machining and thermoforming processes.
  • Good chemical stability: PP has good resistance to many chemicals, making it perform well in chemical environments.
  • High tensile strength and modulus: PP has good tensile strength and modulus, making it useful in applications requiring strength and stiffness.
  • Good electrical insulation: PP is an electrical insulating material with good electrical insulation properties and is suitable for electrical and electronic fields.
  • Plasticity and formability: Due to its thermoplastic properties, PP can be made into various shapes through blow molding, injection molding and other processing methods.
  • Fatigue resistance: PP has good fatigue resistance under fatigue stress, making it perform well in some applications that require durability.
  • Weather resistance: PP has good weather resistance and can resist the effects of ultraviolet rays and weather conditions on the material.
  • Recyclability: PP is a recyclable plastic that helps reduce environmental impact and meets the requirements of sustainable development.

The difference between PP plastic and PVC plastic

PP plastic (polypropylene) and PVC plastic (polyvinyl chloride) are two different types of plastics with some significant differences, including material properties, uses and environmental impact. Here are their main differences:

Chemical composition:

  • PP plastic: polymerized from propylene monomer.
  • PVC plastic: polymerized from vinyl chloride monomer.

Chemical resistance:

  • PP plastic: has good resistance to most chemicals.
  • PVC plastic: can be attacked by certain chemicals, especially at high temperatures and in the presence of solvents.

Thermal performance:

  • PP plastic: has a high melting point and thermal stability, and is suitable for high temperature environments.
  • PVC plastic: It may decompose at higher temperatures and release harmful gases, so its application in high-temperature environments may be limited.

Hardness and Rigidity:

  • PP plastic: relatively soft, but the hardness can be adjusted by changing the formula and processing methods.
  • PVC plastic: Generally harder than PP.


  • PP plastic: usually translucent or opaque.
  • PVC plastic: can be transparent or translucent, suitable for some transparent or translucent applications.

Environmental impact:

  • PP plastic: relatively environmentally friendly and recyclable.
  • PVC plastic: Hazardous substances may be produced during production and handling, some of which may have potential effects on the environment and health. However, PVC plastic can also be recycled and reused.

Application areas:

  • PP plastic: commonly used in food packaging, textiles, medical equipment, auto parts and other fields.
  • PVC plastic: widely used in building materials, cables, pipes, window frames and other fields.
Product Characteristics of Polypropylene Sheets

Overall, the choice between PP plastic or PVC plastic depends on specific application needs and considerations of material performance and environmental impact.

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