What’s the difference between mono-PE and mono-PP?

Sustainable packaging is becoming more essential than ever. From 2030, the new European PPWR legislation will require all packaging to be at least 70% recyclable. That means you’ll need materials that are easy to process and recycle. Monomaterial packaging is a widely used solution: these pouches are made entirely from a single type of plastic – usually PE or PP. But what’s the actual difference between the two? Rob Engelman explains.

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Rob

Commercial director

Compliant with upcoming legislation

Your pouch is ready for the 2030 PPWR regulations.

100% Recyclable

Both PE and PP can be fully recycled through existing plastic recycling streams.

Versatile Applications

Each material can be used for a wide range of pouch types, from stand-up to flat pouches.

Lightweight

PE and PP help reduce transport costs and lower CO₂ emissions across the supply chain.

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What is mono-PE?

Mono-PE packaging is made entirely from one plastic: polyethylene (PE). It’s one of the world’s most commonly used plastics, which comes with a key advantage, explains Rob Engelman: “PE can be easily recycled through regular plastic waste streams.”
PE is made from carbon and hydrogen atoms, which brings a practical benefit. “No toxic substances are released during recycling. Its pure composition and versatility make PE ideal for a wide range of applications.” Another advantage is its low weight – which is convenient for users and efficient in transport. PE is also wear-resistant, resistant to acids, bases, and chemicals, and has a long lifespan. There are several types of PE: LDPE (Low-Density PE), LLDPE (Linear Low-Density PE), and HDPE (High-Density PE). “LDPE is soft and flexible, often used in films and stand-up pouches”, says Rob.
Not sure which version suits your product best? Get in touch – we’ll be happy to help!

What is mono-PP?

Another popular option is mono-PP: packaging made entirely from polypropylene (PP). “PP is known for its high impact strength, excellent chemical resistance, and heat resistance”, says Rob. “This makes it ideal for packaging pet food or supplements. It offers a unique combination of rigidity and flexibility, and like PE, is highly recyclable – making it a future-proof choice.” One standout feature of PP? “It can be bent repeatedly without tearing”, says Rob. PP is also lightweight, durable, acid-resistant, and water-repellent. It can be used as a full monomaterial for pouches or as a specific seal or barrier layer in multi-layer constructions. It seals well thermally, resists high temperatures, and acts as a strong barrier against external influences. “Perfect for products that require reliable protection”, concludes Rob.

What are the key differences – and when do you choose which?

Polypropylene (PP) and polyethylene (PE) are both widely used in pouch packaging – but they each bring unique properties to the table. “PP is stiffer and stronger, handles heat better (up to ±100 °C), and is perfect for pouches that need to retain their shape”, explains Rob. “Think of sleek stand-up pouches for supplements or clear-window pouches for coffee or nuts.” PE, by contrast, is more flexible and impact-resistant, and performs better at low temperatures. “That makes it ideal for larger bags of pet food, flexible bulk packaging, or other shock-absorbing uses.” In terms of appearance, PP is typically clearer – handy when visibility of the contents is key. PE often has a milky appearance, but generally provides better protection against aggressive substances – for example, supplements with active ingredients. “Both are recyclable”, Rob says. “But PP tends to last longer, while PE is more cost-efficient. Use PP for structured, premium or heat-resistant pouches. Choose PE for flexible, impact-resistant applications.”

Smart material use

Choose mono-PE or mono-PP to reduce environmental impact.
Suitable for food & non-food

Both materials are safe and widely applicable – from pet food to supplements and coffee.
Strong & reliable

Whether you need a flexible or rigid pouch, PE and PP provide the right solution.
Future-ready

Monomaterial packaging prepares you for the PPWR legislation and a circular future.

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Are you having trouble sorting things out? Or do you need advice regarding which type of packaging is suitable for your product?

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