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Properties of polyethylene: key characteristics and comparison of types

Polyethylene is a versatile synthetic polymer that plays a leading role in packaging production, as well as in the manufacture of household and industrial goods. Its popularity is due to its unique physical, chemical, and mechanical properties. In this article, we will explore the main properties of polyethylene and compare the three most common types: LDPE, HDPE, and LLDPE.

Physical Properties of Polyethylene

  • Low density — depending on the type, from 0.91 to 0.97 g/cm³;
  • Flexibility and elasticity — especially true for LDPE and LLDPE;
  • High tensile strength — particularly for HDPE and LLDPE;
  • Wear resistance — withstands mechanical stress well;
  • Temperature resistance — operates from -60°C to +80°C (depending on the type).

Chemical Properties of Polyethylene

  • Inertness — does not react with water, acids, or alkalis;
  • Resistance to organic solvents;
  • UV resistance (with stabilizers);
  • Eco-friendliness — recyclable and suitable for multiple reuses.

Mechanical Properties of Polyethylene

  • High impact resistance;
  • Low coefficient of friction;
  • Good weldability — easy to shape when heated.

Main Types of Polyethylene

  • LDPE (Low-Density Polyethylene) — flexible, soft, used for lightweight bags and films;
  • HDPE (High-Density Polyethylene) — rigid and strong, used for durable bags, containers, and pipes;
  • LLDPE (Linear Low-Density Polyethylene) — combines flexibility and strength, ideal for stretch films and heavy-duty sacks.

Comparison Table: LDPE vs. HDPE vs. LLDPE

To help you choose the right type of polyethylene, we’ve summarized the main characteristics in the table below:

Property LDPE HDPE LLDPE
Density 0.91–0.925 g/cm³ 0.941–0.965 g/cm³ 0.915–0.940 g/cm³
Flexibility High Low High
Tensile strength Medium High High
Puncture resistance Low High High
Chemical resistance High Very high High
Temperature range -50°C to +80°C -60°C to +80°C -40°C to +70°C
Typical uses Films, food packaging Pipes, containers, strong bags Stretch film, heavy-duty sacks

Why Choose Polyethylene?

Polyethylene offers a combination of low production cost, excellent physical and chemical properties, and recyclability. That’s why it is the ideal material for packaging, product transportation, pipe systems, and a wide range of consumer goods.

Polyethylene Packaging from Cherpack

At cherpack.net, you can order high-quality polyethylene products — T-shirt bags, courier mailers, packaging pouches, and more for your business needs. We offer competitive wholesale pricing, custom printing options, and fast delivery across Ukraine. Choose secure and efficient packaging with Cherpack!