MDO PE Film
Recyclable PET Alternative
for Mono-Material Flexible Packaging | POLIFILM
MDO PE Film combines excellent printability, transparency, and stiffness, making it an ideal alternative to
PET for recyclable mono-material flexible packaging structures
IN THIS ARTICLE
01 | The Hidden Problem in Everyday Packaging : Limitations of Multi-Material Structures & The Recycling Dead End
Every time you grab a snack, coffee pouch, or ready-meal, you are likely holding Flexible Packaging built from a hidden Multi-Material Structure. Here is what makes up these complex layers :
• Outer Print Layer (Carrier Film) : Typically made from PET (Polyethylene Terephthalate), BOPP (Biaxially Oriented Polypropylene), or OPA (Oriented Polyamide / Nylon) to provide tensile strength, puncture resistance, temperature durability (such as for frozen food), and sharp print quality
• Middle Barrier Layer : Utilizes materials like Aluminum Foil or MPET (Metallized PET) to block oxygen, moisture, light, and odor, which helps extend product shelf life and preserve freshness. Aluminum Foil offers exceptionally high barrier properties, while MPET delivers reliable barrier performance combined with a lightweight structure and cost-efficiency
• Sealing Layer : Primarily relies on PE (Polyethylene) film to enable heat sealing, ensuring a tightly closed package. While highly functional, PE is a completely different polymer from the outer print layers. Laminating these incompatible materials together creates a major limitation for recyclability
While this structure provides strength and aesthetic appeal, it is a primary driver of environmental issues and fails to align with the Circular Economy due to these critical limitations :
• Incompatible in Recycling Streams : Different polymers (such as PET // ALU // PE) possess distinct melting points and chemical properties. This makes them impossible to process together in Mechanical Recycling, causing these packages to inevitably end up in landfills or become plastic waste
• Non-Compliance with EU PPWR : Global environmental regulations are tightening annually, most notably the European Union's EU PPWR (Packaging and Packaging Waste Regulation), which mandates that all packaging must be Designed for Recycling by 2030
• Cost Burdens & Export Challenges for Brands : Non-recyclable packaging may face Plastic Taxes and international trade barriers, directly contradicting the demands of today's eco-conscious consumers
For Brand Owners and Converters, this presents a massive global challenge : How can we preserve premium print quality and packaging strength without harming the planet?
02 | The Future of Flexible Packaging : Mono-Material (All-PE) Sustainable Packaging & 100% PET Replacement
The global Flexible Packaging industry has found the answer to this challenge by redesigning structures into Mono-Material Packaging, utilizing a single polymer type. Today, the most recycling-friendly architecture available is the All-PE Structure (pure Polyethylene)
This involves using only PE film throughout the entire structure from the outer Print Carrier Film to the inner sealing layer. It is designed to replace PET, OPA and OPP in selected flexible packaging applications while supporting recyclable mono-material PE structures
The key advantages of transitioning to an All-PE packaging structure include :
• Designed for PE recycling streams when used in accordance with recyclable packaging design guidelines. Actual recyclability depends on the final structure, inks, adhesives and local recycling infrastructure
• Supply Chain Simplification : It helps packaging converters reduce complexities across the board—from raw material procurement and production processes to post-consumer waste management
• Supporting EU PPWR-aligned recyclable packaging strategies : Empowers brand owners to achieve tangible environmental goals. It eliminates concerns over international trade barriers or plastic taxes, enabling confident exports to Europe and global markets
However, a major engineering challenge remains : How can standard, highly elastic PE film provide the tensile strength, high transparency, and sharp print quality equivalent to a highly popular print carrier film like PET?
This is exactly where innovative MDO PE Film steps in as a game-changer to shatter these limitations
03 | What is MDO Technology? The Core Innovation Making MDO PE Film the Perfect PET Replacement
MDO (Machine Direction Orientation) is a process that stretches a polymer film in a single direction (the machine's running direction) under strict temperature and stretching controls. This specific process is the secret behind transforming standard PE into high-performance MDO PE Film
The Structural Transformation : Turning Soft PE into a Rigid Print Carrier Film
• Standard PE Film (Before MDO) : Naturally, the internal molecules of PE are tangled together like a messy ball of yarn. This makes the film soft, overly stretchy, and weak. Because it cannot handle the pulling tension of printing presses, standard PE is fundamentally unsuitable to be used as a Print Carrier Film
• MDO PE Film (After MDO) : The MDO technology stretches and untangles these molecules, forcing them to align into straight, parallel lines. This structural upgrade turns the soft film into a rigid, highly durable layer. It breaks the old limitations, making it the ultimate PET replacement for the sustainable packaging industry
4 High-Performance Properties of MDO PE Print Carrier Films
High Stiffness and Stability :
The newly aligned molecular structure gives the film high stiffness, preventing it from stretching or sagging while running through printing presses. This allows for consistent Tension Control and precise color registration (ensuring colors do not overlap). This mechanical stability makes it a strong print carrier film suitable for replacing PET in many flexible packaging applications
Premium Aesthetics :
MDO PE Film is available in both clear and matt finishes. This enhances printed graphic details and adds dimension, allowing it to seamlessly replace PET while meeting premium packaging design standards
Superior Printability & Wide Compatibility :
The film features an exceptionally smooth and consistent surface, ensuring strong ink adhesion and vibrant, sharp colors. It is highly compatible with Rotogravure, Digital Printing, and most importantly, UV Flexo presses—the most widely used printing system among Flexible Packaging converters
Enhanced Natural Barrier Properties :
As the molecules are densely packed together, it becomes much harder for air and water to pass through. This naturally equips the film with a superior oxygen and moisture barrier compared to standard PE film of the same thickness. It effectively helps preserve product freshness and extend shelf life
04 | POLIPURE MDO : The German-Standard MDO PE Film Innovation from POLIFILM
POLIFILM, an established global leader in polymer film manufacturing from Germany, developed the POLIPURE MDO series as a high-performance print carrier film designed as an alternative to PET, OPA and OPP in recyclable PE-based laminate structures. This solution enables converters to transition smoothly to sustainable, All-PE structure packaging without production disruption
POLIPURE MDO Model Comparison
| Feature | POLIPURE MDO Standard | POLIPURE MDO EVOH (High-Barrier OTR + WVTR) |
|---|---|---|
| Material Structure | 100% Mono-axially oriented PE (Mono-Material) | Mono-axially oriented PE blended with an EVOH barrier layer |
| Recyclability | Up to 100% recyclable packaging film in PE streams | Recy Class compliant (certificate available upon request (ratio below 5%) |
| Gas Barrier | Superior moisture and oxygen protection compared to standard PE | High-barrier protection against oxygen and moisture; excellent odor retention |
| Thickness & Finish | 25–50 microns (μm) / Available in Clear and Matt | 25–50 microns (μm) / Available in Clear and Matt |
| Ideal Applications | General goods, household items, dry food, pouches | Coffee, snacks, processed foods requiring extended shelf-life |
4 High-Performance Properties of MDO PE Print Carrier Films
| Property | PE | MDO PE | PET |
|---|---|---|---|
| Stiffness | Low | Medium-High | High |
| Transparency | Medium | High | High |
| Printability | Medium | High | Excellent |
| Recyclable in PE Stream | Yes | Yes | No |
Converting & Machinability Advantages
To eliminate production complexities, POLIFILM’s MDO PE Film is specifically engineered for the flexible packaging industry with 3 core advantages
• Drop-in Solution (No New Machinery Needed) : The film can be seamlessly processed on your facility's existing standard printing presses, laminators, and Form-Fill-Seal (FFS) machines without requiring new equipment investments
• High-Resolution Print Support : The film surface is developed for strong ink adhesion without flaking. It supports fine-dot screen printing, delivering sharp and vibrant color quality equivalent to using PET films
• Comprehensive Packaging Formats : Seamlessly convert this film into Stand-Up Pouches, 3-side seal pouches, automated FFS rolls, and labels. This ensures your entire packaging portfolio is fully prepared for EU PPWR compliance
05 | Drive Your Sustainable Packaging Strategy with PSG’s MDO PE Film
Successfully transitioning your structure to Mono-material Packaging (All-PE Structure) requires more than just selecting the right material. It demands a deep understanding of polymer chemistry, ink properties, laminating adhesives, and precise machine parameter tuning
As the official distributor of POLIFILM products in Thailand, Press Systems Group (PSG) is ready to partner with the Thai printing and packaging industry. We support your confident transition to sustainability through our comprehensive, end-to-end services :
• Expert In-Depth Consulting : We provide professional guidance on pairing MDO PE Film structures with PE sealing films to achieve precise High-Barrier (oxygen and moisture) properties, perfectly extending the shelf-life of specific product categories
• PSG Demo Center (Printing & Converting Trials) : Eliminate on-site production risks. You can test our films directly on real machinery at our facility before your actual production run to verify tension control, precise color registration, ink adhesion, and seal strength
• Dedicated Local Thai Support Team : Receive hands-on, on-site recommendations for machine tuning. We also keep you updated on global environmental standards, like the EU PPWR, ensuring your brand stays ahead of the curve
Elevate your packaging with a truly recyclable PET replacement film without compromising on premium quality. To request MDO PE Film trial samples or consult with PSG experts, contact us today
Address: 3030 Moo 10, Samrong Nuea, Mueang Samut Prakan, Samut Prakan 10270, Thailand
Phone: +66 (0) 2 118 3852 | +66 (0) 61 789 4744
Email: info@presssystems.co.th