Sustainable paper-based alternative to plastic films, offering high grease barriers and stable runnability at 300+ PPM.

Leoprint heat-sealable paper flow-pack mockup, representing recyclable flexible packaging for high-speed lines.

Recyclable paper flow-pack wrapper that runs as fast as plastic film.

We engineer high-performance printed flow-pack packaging designed as a 'drop-in' solution for automated lines. Our materials — ranging from PAP 22 to monoplastics and bio-based laminates — are tailored to your specific machinery.

Why our packaging outperforms standard solutions:

  • Multi-Layer Surface Technology: Instead of one thick, unstable layer, we use a multi-layered thin coating. This ensures the material doesn't twist or jam, even on wide formats (400mm+ width), where thickness fluctuations are critical.
  • Wide Sealing Window: Our materials are engineered to have a sealing window as close to polyethylene as possible, allowing stable operation across a wide temperature range. It heat-seals at both slow and high speeds.
  • Zero Deformation: We solve the issue of material shifting during folding and cutting. Our packaging remains truly flexible without the 10 gsm brittle glaze common in the market that often jams machines.
  • Plug-and-Play Integration: We adapt the raw material parameters to your equipment, not vice-versa, ensuring correct slipperiness and heat-seal performance for maximum speed.

Target market

Confectionery, bakery, dry snacks, and non-food flow-wrap applications.

Product details

  • 300+ PPM runnability
  • PAP 22 Recyclable
  • MOSH/MOAH Barrier
  • Low sealing temperature
  • Excellent optical properties

Sustainability and Certifications

FSC® logo

FSC®-certified paper available on request (license number FSC-C132885)

Recycling symbol (Mobius loop)

Recyclability

Compostable seedling logo (EN 13432)

Compostability

Usage benefits

High barrier protection

Customizable O2 and moisture barriers to extend shelf-life for bakery, confectionery and dry foods.

Plug-and-play stability

Engineered for wide sealing windows and consistent layer thickness, ensuring zero deformation even on high-speed machines (400mm+ width).

Sustainable materials

Recyclable heat-sealable paper and bio-based laminates (NatureFlex™, PLA), monoplastics (PP) for eco-compliance.

Reliable sealing

Low-temperature sealing capabilities ensuring package integrity and energy efficiency.

Gallery

Who PAP 22 flow-pack paper is for

This material is for manufacturers who pack on horizontal (HFFS) or vertical (VFFS) form-fill-seal lines and want to replace BOPP, PE or paper/PE laminates with paper, without buying new equipment. It is used in confectionery, bakery, dry snacks, dry food and non-food flow-wrap. Most of our customers have the same concern: a material that has run reliably for years is about to be replaced, and the line cannot afford jams, weak seals or lost speed.

Typical applications include:

  • Dry food staples: lentils, rice, grains, flour and pasta in kraft paper flow-packs, with the option of a crystal-clear window made from natural cellulose fibres.
  • Premium and specialty foods: paper flow-packs with a soft-touch water-based finish for brands that want a high-end feel without plastic laminates.
  • Sachets and sticks: instant porridge sachets and HORECA sugar sticks on VFFS lines, including machines with ultra-narrow sealing jaws.
  • Confectionery, bakery and snacks: products that need a grease barrier and a clean, sharp print.

How the paper runs like film

When a packer moves from film to paper, three properties decide whether the line keeps running: stiffness, friction and sealing behaviour. We set all three to match your current material. For UAB "Skanėja", which had packed grains, beans and sugar in a paper/PE laminate for two decades, our technical team calibrated the paper's tensile strength and stiffness to the old laminate. The switch to recyclable barrier paper happened with no disruption or speed loss.

Sealing is the second half of the job. Some VFFS machines use very narrow jaws to save material, and standard heat-seal paper fails to bond on such small areas. For UAB "Klingai" we developed a high-tack dispersion coating that activates at lower temperatures and creates a fibre-tearing bond on the machine's original sealing zones, with no mechanical changes.

How to choose the right structure

Our flow-pack materials range from PAP 22 paper to monoplastics and bio-based laminates. The choice depends on the product, the shelf and the end-of-life you are aiming for:

  • PAP 22 barrier paper is the default when the pack should go into paper recycling. Non-fibre content (barrier plus inks) is kept below 5%.
  • Kraft with a crystal window suits dry goods where shoppers want to see the product. In the RAPID FLOW project this structure replaced BOPP/PE film as a drop-in, validated at 300+ PPM with zero machine modifications.
  • Soft-touch paper (SENSE FLOW) gives premium brands a tactile finish on FSC® paper while staying PAP 22.
  • Compostable barrier and paper/PLA laminates are options where a compostable pack or a high oxygen barrier, for example for coffee, is the priority.

Before deciding, look at fat and oil content (grease and MOSH/MOAH barrier), moisture sensitivity, whether a window is needed, and how consumers in your markets will dispose of the pack.

Sustainability and end-of-life

A PAP 22 flow-pack goes into the standard paper stream: one bin, no layer separation and no sorting decision for the consumer. Removing the PE layer also cuts weight. In the Skanėja project the lighter pack produced savings on both material and logistics. FSC® certified paper is available on request (licence FSC-C132885). Recyclable and compostable structures are different materials with different end-of-life routes, so we agree the target with you at the start and keep claims on pack consistent with the structure chosen.

PPWR, EPR and packaging fees

The EU Packaging and Packaging Waste Regulation (PPWR) has applied since 12 August 2026. For food brands this brings recyclability, food-contact documentation and EPR registration into focus; our PPWR compliance checklist sets out what needs to be in place. Packaging classification also drives cost. A composite laminate sits in the "combined" category, while a PAP 22 paper pack falls under the paper category, which significantly reduces EPR exposure across EU markets. The exact saving depends on your countries and volumes.

How a project with Leoprint works

We adapt the material to your equipment, not the other way around. To start, we need your machine type (HFFS or VFFS), web width, the material you run today, the product you pack and the end-of-life target. Our team then tunes coating, slipperiness and sealing behaviour to those conditions, and prints with flexography for consistent colour across long runs. We have also supported variable batch sizes, for example private-label sugar sticks for smaller cafe chains. Minimums, lead times and prices are quoted per project. Talk to our team about moving your line to paper.

Specifications

Material options | PAP 22 heat-sealable barrier paper; monoplastics and bio-based laminates Compatible machines | HFFS and VFFS flow-pack lines Line speed | 300+ PPM Barrier | Grease, moisture and MOSH/MOAH barrier Sealing | Low sealing temperature; wide sealing window close to polyethylene Web width | Stable runnability on wide formats (400 mm+) Window option | Crystal-clear window from natural cellulose fibres Recyclability | PAP 22, paper recycling stream (<5% non-fibre content) Certifications | FSC® certified paper on request (FSC-C132885) Applications | Confectionery, bakery, dry snacks, dry food, non-food flow-wrap
Download data sheet (PDF)

Frequently asked questions

Will PAP 22 paper run on my existing flow-pack machine?

That is what it is designed for. The material is engineered for HFFS and VFFS lines at 300+ PPM, and we adapt its slipperiness and sealing parameters to your equipment. In the RAPID FLOW project our kraft flow-pack replaced BOPP/PE film with zero machine modifications, and for Skanėja the switch from paper/PE laminate caused no disruption or speed loss.

What does PAP 22 mean for my packaging?

PAP 22 is the recycling code for paper packaging. Our structures keep the non-fibre share, meaning the functional barrier plus inks, below 5%, so the pack is treated as paper rather than as a composite. For the consumer that means one bin and no separating layers. For you it usually means a lower EPR fee category than a combined paper/plastic laminate.

Which barriers does the paper provide?

Our flow-pack paper offers a grease barrier, protection against moisture and a MOSH/MOAH barrier against mineral oil migration. The barrier is applied as several thin layers instead of one thick coat, which keeps the paper flexible and stops it twisting or jamming. Where a high oxygen barrier is needed, for example for coffee, we can also look at paper/PLA laminates.

Can I have a window in a paper flow-pack?

Yes. We produce flow-packs with a crystal-clear window made entirely from natural cellulose fibres, with no PE film. The structure stays PAP 22 monomaterial with less than 5% non-fibre content. It is available on natural kraft paper for dry goods such as lentils, rice and flour, and on soft-touch FSC® paper for premium products.

What do you need from us to prepare an offer?

Please share your machine type (HFFS or VFFS) and model, web width, the material you use today, the product being packed and the end-of-life goal, recyclable or compostable. Artwork and approximate volumes help us plan printing. Minimums, lead times and prices are quoted per project, and our team will propose a structure adapted to your line.

PPWR compliance checklist

PPWR compliance checklist

A two-page checklist for getting food packaging ready for the EU PPWR: PFAS limits, Declarations of Conformity, EPR, and what can wait until 2030.

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Let’s create packaging that makes a difference

Whether you’re launching a new product or improving existing packaging, our team is ready to help you find the perfect solution — from concept to delivery.

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