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PP

Introduction to Polypropylene (PP) Material

Polypropylene (PP) is a thermoplastic polymer synthesized from propylene monomers. It belongs to the family of semi-crystalline polyolefin plastics. Due to its stable physical properties and strong chemical resistance, PP is widely used in packaging, textiles, automotive, electronics, construction, and daily consumer products.

Material Properties

01

Physical Properties

PP has a density of approximately 0.90–0.91 g/cm³, making it one of the lightest materials among common plastics. It exhibits good tensile strength and rigidity, along with moderate impact resistance.

02

Heat Resistance

The melting point of polypropylene ranges from 130°C to 170°C, enabling it to withstand high-temperature environments. It is suitable for heat-sealed packaging and certain applications requiring sterilization.

03

Chemical Resistance

PP offers excellent resistance to most acids, bases, and organic solvents. It is not easily corroded, making it ideal for chemical and humid environments.

04

Processability

PP has excellent forming and processing capabilities. It can be molded into a wide range of products using blow molding, injection molding, extrusion, and thermoforming, with high processing stability.

05

Environmental Compatibility

As a recyclable material (classified as plastic #5), PP does not emit harmful gases when burned and offers a certain degree of reuse potential. It is considered one of the more environmentally friendly plastic materials.

Main Applications

  • Industrial Packaging: Used in woven bags, blown packaging films, and bulk material packaging bags.
  • Household and Consumer Goods: Found in storage containers, water buckets, furniture components, and children's toys.
  • Textiles and Nonwoven Fabrics: Applied in agricultural covers, dust shields, weed control fabrics, and medical textiles.
  • Automotive and Electronics: Used in car interior components, household appliance casings, and electrical insulation parts.

Processing Technologies

PP raw materials can be modified by adding various additives and fillers to adjust rigidity, transparency, or degradability, depending on specific application needs. For example, in degradable packaging products, PP can be compounded with PLA or starch-based materials to achieve partial biodegradability.