Bioska film 506
Compostable Films for Packaging and Fibre Tray Lamination
Certified compostable films designed for converters producing flexible packaging and fibre-based packaging solutions.
Customisable compostable films for packaging and fibre-based lamination
Walki Bioska compostable films are based on a single material platform that can be customised for different converting processes and packaging formats.
The same compostable material can be tailored for:
- Flow-pack packaging for fresh produce and non-food products
- Lamination films for fibre-based food trays made from pulp or cardboard
- Compostable flexible packaging solutions for sachets and small packaging formats
This approach allows converters to work with a consistent compostable material concept across multiple packaging applications.
Bioska films meet the EN 13432 compostability standard, ensuring complete breakdown into natural components without leaving microplastics.
The materials deliver reliable sealing performance, transparent appearance and excellent runnability on industrial packaging lines.
Walki Experts
In this Walki Expert video, Marko Päiväniemi introduces Walki Bioska compostable films and explains how the material can be customised for different packaging applications. He discusses the use of Bioska films for flow pack packaging and lamination on fibre-based trays and flexible packaging. The video highlights compostability according to EN 13432 and the benefits for converters developing compostable packaging solutions.
One compostable material platform – multiple applications
Walki Bioska 506 compostable films are designed as a customisable material platform that can be adapted to different packaging applications.
Flow Pack Packaging
Customised Bioska films can be used on flow-pack lines for packaging both food and non-food products.
Typical applications include:
- Fruits and vegetables
- Bakery products
- Fresh produce
- Non-food items
Key benefits:
- Transparent film
- Reliable sealing
- Excellent runnability
- Printing compatibility
Food Tray Laminations
Bioska films can be customised as lamination films for fibre-based food trays, providing a compostable structure with reliable protection and food-contact suitability.
Typical applications include:
- Moulded pulp
- Solid board
- Folding board
Key benefits:
- Grease resistance
- Compostable structure
- Food-contact suitability
Compostable Sachet
Bioska films can also be used for small-portion flexible packaging.
Typical applications include:
- Sachets
- Small portion packaging
- Dry food packaging
- Single-use packaging formats
Key benefits:
- Compostable structures
- Good sealing performance
- Converting compatibility
- Printability
Walki compostable laminates are designed to deliver both industrial performance and certified compostability.
- EN 13432 industrial compostability certified
- No microplastic residue after composting
- Good grease resistance
- Reliable sealing performance
- Suitable for both horizontal and vertical flow-pack applications
- Transparent and printable structures
- Suitable for lamination on fibre trays
- Food contact compliant
- Compatible with existing converting equipment
- Highly breathable film
Customisation
Tailored compostable laminates for converters
Walki offers extensive customisation to meet specific converting and packaging requirements. We optimise compostable laminates for:
Film performance characteristics:
The film withstands liquids and protects the fibre or pulp substrate from becoming wet. Its relatively high water vapour transmission rate (WVTR) makes it highly breathable, helping to prevent condensation inside the pack. This is beneficial for fresh produce such as cut salads and berries. Thanks to the high WVTR, no perforation is needed, creating a favourable in-pack atmosphere that supports shelf life.
Walki offers extensive customisation to meet specific converting and packaging requirements. We optimise compostable laminates for:
Printing
- Flexographic printing compatibility
- Surface optimisation
- High ink adhesion
Converting performance
- Stable runnability
- Controlled friction
- Reliable sealing
- Consistent thickness
Dimensions
- Custom widths
- Custom thickness
- Reel lengths optimised for production efficiency
Designed for Professional Converters and Packaging Producers
Walki compostable laminates are designed for industrial partners across the packaging value chain.
Food tray producers
- Fibre moulding producers
- Tray manufacturers
- Thermoforming companies
Converters
- Lamination companies
- Printing converters
- Packaging material producers
Packaging suppliers
- Packaging distributors
- Food packaging traders
- Private label packaging suppliers
Food service packaging providers
- Catering packaging suppliers
- Takeaway packaging suppliers
Compostable Laminates vs Conventional Plastic Laminates for Fibre-based Packaging
| Feature | Walki compostable laminates | Conventional plastic laminates |
|---|---|---|
| End-of-life | Industrial composting | Landfill or incineration |
| Microplastics | None | Yes – persistent microplastics |
| Food waste compatibility | Yes | No |
| EN 13432 certified | Yes | No |
| Renewable content | Partly | Limited |
| Circularity | Returns nutrients to soil | Linear waste stream |
Compostable Solutions for Food-Contaminated Packaging
Food trays and fibre-based packaging are often contaminated with food residues after use, making recycling or repulping technically challenging and economically inefficient. In these situations, compostability provides a practical end-of-life alternative.
By enabling the packaging to be composted together with food waste, compostable laminates allow the material to return to the biological cycle and be transformed into compost that enriches the soil. This approach is particularly relevant in applications where organic waste collection systems are available and where food contamination limits conventional recycling options.
Walki compostable laminates support converters in developing packaging solutions designed for real end-of-life conditions, offering a responsible and functional alternative for food-contact applications.
Bioska compostable films are designed for converters producing compostable packaging. The material can be customised for different applications, including flow pack packaging for food and non-food products, lamination on fibre-based food trays made from pulp or cardboard and lamination on fibre-based flexible packaging such as sachets and small packaging formats. This allows converters to develop multiple compostable packaging solutions using one material platform.
Yes. Bioska films can be customised as lamination films for fibre-based trays made from moulded pulp or board materials. The films provide grease resistance while maintaining certified compostability. This makes them suitable for food trays used in food service, takeaway and fresh food packaging applications.
No. Bioska compostable films comply with the EN 13432 compostability standard and break down into carbon dioxide, water and biomass under industrial composting conditions. The materials do not leave persistent microplastics in the soil after composting.
Yes. Bioska compostable films are designed to run on standard converting and packaging equipment, including flow-pack machines and lamination lines. The films offer reliable sealing performance, stable runnability and good printability, allowing converters to integrate compostable materials with minimal process adjustments.
Fibre-based food trays are often contaminated with food residues, which makes recycling or repulping difficult. Compostable laminates provide an alternative end-of-life option by allowing the tray and laminate to be composted together with food waste. This enables the packaging to return to the biological cycle and be transformed into compost for the soil.
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