Paper Coating: Plastic Film or Water-Based Dispersion?
- Karine Morel
- [wpcode id="48710"]
Table of content
Understanding technologies to successfully transition to more sustainable packaging
The shift toward more responsible packaging is accelerating. Driven by new European regulations (PPWR, AGEC law) and market pressure, manufacturers are seeking solutions capable of replacing plastic without compromising performance.
But one question keeps coming up:
👉 Which coating technology should be chosen to turn paper into a high-performance barrier material?
Two main families currently dominate the market:
- film coating (extrusion / lamination)
- water-based dispersion coating
Understanding their differences is essential to making the right choice.
1- Film coating: the historical performance benchmark
Film coating involves applying a molten polymer (PE, PP, PET, EVOH…) directly onto paper via extrusion, or laminating a pre-made film.
The plastic film forms a continuous layer that provides high barrier properties.
Advantages
- Excellent moisture barrier (low WVTR)
- Very good oxygen barrier (with EVOH)
- Strong heat sealing
- High mechanical resistance
- Stable performance on high-speed lines
This technology has historically been used for industrial bags, sensitive food packaging, and chemical applications.
Limitations
- Polymer content often above 10–15 g/m²
- More complex recyclability
- Difficulty meeting certain EN643 requirements
- Less favorable image in a “plastic reduction” strategy
Extrusion remains a benchmark solution for highly demanding applications, but it can become restrictive in a context of drastic plastic reduction.
2- Water-based dispersion coating: the new generation of barrier solutions
Water-based dispersion coating relies on applying a liquid formulation based on water, containing polymers in dispersion (acrylics, PVOH, latex, bio-based solutions…). After drying, a thin barrier film forms on the paper surface.
Advantages
- Low polymer content (often <5%)
- Improved recyclability
- Stronger environmental image
- Good printability
- Compatible with existing lines
- Plastic weight reduction up to 80–90%
This technology is particularly suited for dry food packaging, pet food, logistics solutions, or lightweight alternatives to plastic flowpack.
Limitations
- Moisture barrier generally lower than solid PE
- Oxygen barrier more challenging to achieve
- Heat sealing requires fine tuning
Performance strongly depends on formulation and coating expertise.
3- Film vs dispersion: which technology to choose?
| Criteria | Film coating | Water-based dispersion |
|---|---|---|
| Polymer content | High | Low |
| Recyclability | Medium | Good to very good |
| Moisture barrier | Excellent | Good |
| Oxygen barrier | Very good (multilayer) | Variable |
| Sustainability image | Medium | Strong |
| Plastic transition compatibility | Limited | Very favorable |
4- The real question: maximum performance or sustainable balance?
The choice does not depend solely on technical performance.
It must also consider:
- Regulatory requirements
- Company CSR objectives
- Expected recyclability
- Compatibility with existing lines
- Overall cost of the solution
- Brand image
Today, market trends are clear:
📈 Drastic reduction in plastic grammage
📈 Development of high-performance dispersions
📈 Search for a balance between barrier properties, recyclability, and processability
5- Toward hybrid solutions
More and more manufacturers are opting for:
- reinforced dispersions
- hybrid structures with low polymer content
- bio-based formulations
- optimized technical combinations
The goal is no longer just to replace plastic, but to rethink paper functionalization.
Conclusion
Coating is now the key technological lever in the transition toward high-performance paper packaging.
Film coating guarantees maximum performance.
Water-based dispersion opens the way to significant plastic reduction and improved recyclability.
The key to success?
Precisely analyze the application, the packaged product, logistical constraints, and environmental objectives.
The transition from plastic → paper is not a confrontation between two technologies.
It is a search for an intelligent balance between industrial performance and environmental responsibility.
Our team will help you find the solution that meets your needs.