Sustainable Packaging
Learn when paper-based flexible packaging can replace plastic, what barrier performance it needs, and where coated paper works best.
Pick up a coffee pouch, a packet of chips, or a spice sachet, and the packaging feels almost effortless. It bends, seals tightly, keeps the product protected, and takes up very little space.
Plastic became so common in flexible packaging because it does all of these jobs extremely well.
So when we talk about replacing plastic with paper, the real question is not whether paper can be shaped into a pouch. It can. The harder question is whether paper-based flexible packaging can protect the product as well as the plastic structure it is replacing.
The answer depends on what we ask the paper to do.
Paper starts with one major advantage: it is fibre-based
Paper is made primarily from cellulose fibres and can be sourced from wood, recycled pulp and agricultural residues. It is lightweight, printable and already familiar across cartons, bags, wraps and food-service packaging.
But flexible packaging asks much more from a material than simply holding a product.
A snack pouch may have to keep humidity out. Coffee packaging has to protect aroma while limiting oxygen exposure. An oily product needs grease resistance. Almost every sealed pouch also needs a surface that can close reliably under heat.
Untreated paper struggles with several of these requirements because its fibre structure is porous and naturally attracts moisture. Recent research on biopolymer coatings for paper-based food packaging highlights moisture, grease and gas resistance as some of the main challenges that coatings need to solve for paper packaging.
That is where paper-based flexible packaging becomes more interesting.
A functional coating can change what paper is able to do
When we add the right coating to paper, we can give the surface properties that ordinary paper does not naturally have.
Depending on the product, a coating may help provide:
Protection from oxygen
Resistance to water and water vapour
Oil and grease resistance
Aroma protection
Heat-sealing properties
A review on sustainable barrier coatings for food packaging identifies oxygen, moisture and grease barriers as key functions that coatings can add to paper.
This matters because many of the jobs performed by flexible plastic packaging are actually barrier functions.
If those functions can be provided through a coated paper structure, paper can become relevant for applications where plain paper would never work.
But “paper packaging” can still contain plastic
This is where the conversation gets more complicated.
A package may look and feel like paper while still containing a conventional plastic film or coating. The plastic might be there to prevent moisture from entering, create a seal or stop oil from soaking through the fibres.
A disposable paper cup is a familiar example. The outside looks like paper, but the inside generally needs a barrier layer so that the cup can hold liquid.
The same principle applies to flexible packaging.
Adding a plastic layer may solve the performance problem, but we can end up with another mixed-material structure that is harder to separate after use. The Cepi Paper-Based Packaging Recyclability Guidelines note that coatings and laminates can make paper recycling more challenging even though they provide important functional properties.
So replacing a plastic pouch with a paper pouch that contains a substantial plastic laminate does not necessarily remove the original problem. It may simply change its appearance.
The food determines how far paper can replace plastic
There is no single answer to whether paper can replace plastic because food products need very different levels of protection.
Take three familiar examples.
Dry grains are relatively forgiving. Their packaging may not require the same oxygen and aroma protection as coffee.
Chips need stronger moisture protection because even small amounts of humidity can affect crispness.
Coffee is more sensitive. Oxygen, moisture and aroma loss can all affect its quality, which means the packaging may require a much stronger barrier.
The more demanding the product, the harder it becomes to replace a high-performance plastic laminate with a simple paper structure.
That is why we should not begin with the statement, “We want paper.”
A better starting point is: What does this particular food need from its package?
Flexible also means it has to work on a machine
There is another part of the problem that we rarely see when looking at a finished pouch.
Flexible packaging is produced at speed.
On a form-fill-seal line, a roll of material may be shaped into a package, filled with product and sealed within seconds. The material needs to move smoothly through rollers, fold correctly and create consistent seals without tearing or slowing the machine.
Paper behaves differently from plastic. It can have different stiffness, friction and sealing characteristics. Even a material with excellent barrier properties may not become a practical alternative if it repeatedly jams the line or requires major machinery changes.
This is why FFS compatibility and heat sealing are as important as the material itself.
The package has to work in the factory before it can work on the shelf.
Shelf life remains the real test
A packaging trial is not complete when the pouch looks good.
We still need to put the actual product inside and see what happens over time.
Does a snack remain crisp after several weeks? Does coffee retain its aroma? Does the seal hold during transport? How does the pack behave in a humid warehouse or during a hot delivery journey?
These questions matter because packaging exists primarily to protect what is inside. The Cepi recyclability guidelines also emphasise that one of packaging's primary functions is protecting products through the logistics chain and preventing product loss.
A material that uses less plastic but causes more food to spoil is not necessarily a better packaging solution.
Performance and end of life have to be considered together.
Paper can replace plastic in some applications, not all
The most useful answer to the title of this article is therefore: yes, but selectively.
Paper-based flexible packaging can become a practical alternative when the required barriers can be achieved through an appropriate coating, the material can run on existing machinery and the completed pack can deliver the required shelf life.
In other applications, the barrier requirements may still be too demanding. A different packaging structure, including a mono-material plastic solution, may make more sense.
Research into newer paper barrier-coating technologies is increasingly focused on improving resistance to water, water vapour, grease and oxygen while also addressing the challenges of industrial scale-up.
The aim should not be to force every product into paper. It should be to identify where paper can genuinely perform the job with a simpler material structure.
Pippa is working on the performance gap
At Pippa, this is the problem we are trying to solve.
Our approach uses a bio-based coating made from agricultural waste to turn paper into a more functional flexible packaging material. The coated structure is designed to provide water, oxygen, oil, and grease barriers while also supporting heat sealing and form-fill-seal compatibility.
Pippa is also home compostable, PFAS-free, and designed to provide OTR and WVTR values below 1.
The idea is not that paper can automatically replace every plastic pouch. Coffee, snacks, spices, and other products each have different barriers and shelf-life requirements, and those applications still need to be tested individually.
What changes is the starting point.
Instead of building performance by adding several conventional plastic layers, we can explore how much functionality can be delivered through one coated paper structure.
So, can paper replace plastic?
For some flexible packaging applications, yes. But the better question is whether we can make paper perform the jobs plastic was doing without rebuilding the same complexity in another form.
FAQs
1. What makes paper suitable for flexible packaging?
Paper becomes suitable for flexible packaging when coatings provide the barrier, sealing and durability needed for the product.
2. Which food products are easier to pack in paper-based flexible packaging?
Dry foods and products with moderate barrier needs are generally easier to transition than highly oxygen- or moisture-sensitive foods.
3. Why is coffee harder to pack in paper than dry grains?
Coffee needs stronger protection from oxygen, moisture and aroma loss, which makes its packaging requirements more demanding.
4. Can paper-based packaging match plastic on shelf life?
It can in some applications, but shelf life must be tested with the actual product, storage conditions and final packaging structure.
5. How does Pippa make paper more functional?
Pippa uses a bio-based coating designed to add water, oxygen, oil and grease barriers along with heat-sealing properties.
6. Can Pippa replace multilayer plastic packaging?
Pippa may be suitable for selected applications, but each product still requires barrier, shelf-life and machinery testing.
7. What products can brands test with Pippa?
Pippa can be evaluated for flexible-packaging applications such as dry foods, snacks, tea, coffee and spices, depending on performance requirements.
8. Does Pippa use plastic layers to create its barrier?
Pippa’s approach is to provide multiple packaging functions through a bio-based coated structure rather than conventional multilayer plastic laminates.
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