Walki®Line / Walki®EVO Line
Barrier lining for solid board – designed for circular performance
Advanced fibre-based barrier solutions for solid board packaging
Protect performance. Enable recyclability. Meet future packaging requirements.
Walki provides high-performance barrier lining solutions specifically developed for solid board packaging applications. These solutions protect against moisture, grease, and environmental stress while preserving the structural integrity of the board in demanding conditions.
Designed in line with evolving EU packaging requirements, including PPWR, Walki barrier liners support recyclability in standard paper waste streams while delivering reliable barrier performance for both food and non-food applications.
Whether for fresh produce, frozen food, industrial goods, or sensitive products, Walki solutions help converters and board producers balance performance, efficiency, and circularity.
Walki Experts
Watch Robert Björklind explain how Walki’s barrier lining solutions help solid board maintain strength in wet, greasy and demanding environments, while protecting products, enhancing packaging performance and supporting recyclability in fibre-based systems.
Barrier solutions for solid board, engineered for performance, compliance and real-world application needs.
Customisation
capabilities
Walki solutions are developed in close collaboration with customers to deliver fit-for-purpose solutions that perform efficiently across the supply chain.
Customisation options include:
- Barrier level (moisture, grease, oxygen, etc.)
- Coating or lamination technology
- Printability and visual appearance
- Mechanical performance and stiffness
- Size, grammage and structure
PPWR-ready
solutions
Walki barrier linings are designed to align with the EU Packaging and Packaging Waste Regulation (PPWR) direction:
- Designed for recyclability
- Reduced reliance on complex multi-material structures
- Compatible with existing paper recycling systems (especially dispersion solutions)
- Supporting 2030 recyclability targets
Industries
and Users
Walki solutions support a wide value chain:
Packaging distributors and traders
Solid board converters
Board producers
Packaging manufacturers
Food and non-food brand owners
Logistics and warehouse operators
Product overview
Walki offers a comprehensive portfolio of barrier lining solutions for solid board, each engineered to meet different performance and sustainability needs:
Walki®EVO Line
Dispersion-coated solution optimised for recyclability
Walki®Line Solid
Reliable PE-coated barrier with strong moisture protection
Walki®Line Aqua
Enhanced moisture barrier with flexible lamination structures
Walki®Line Ultra
High-performance grease and heat resistance with PET-based barriers
dispersion coatING
Walki®EVO Line
Next-Generation Dispersion Coated Barrier Technology
Walki®EVO Line represents the latest generation of dispersion coated barrier liners, designed to deliver strong barrier performance.
This solution supports future packaging requirements by combining functional barrier protection with recyclability in paper waste streams.
Key benefits:
- Water-based barrier coating
- Medium to high barrier performance
- Recyclable and repulpable
- Printable and glueable
- Natural paper-like appearance
Typical applications:
- Frozen food packaging
- Fresh produce packaging
- Sustainable retail packaging
Walki®EVO Line is designed to support converters preparing for future recyclability requirements and circular packaging targets.
PE coating
Walki®Line Solid
Reliable moisture barrier for solid board performance
Walki®Line Solid is a fibre-based, PE-coated barrier liner designed to maintain the strength and stability of solid board in humid and demanding conditions.
Key benefits:
- Good water and moisture barrier
- Maintains compression strength and stiffness
- Food contact approved (dry, moist and greasy)
- Printable surface, including PE layer
- Available in brown or white, wide grammage range
Typical applications:
- Fresh produce packaging
- Seafood and fish boxes
- Flowers and plants packaging
- Detergents and industrial goods
PE / glue lamination
Walki®Line Aqua
Versatile barrier solution for enhanced moisture protection
Walki®Line Aqua offers flexible structures and higher grammage options, delivering very good moisture resistance for a wide range of solid board applications.
Key benefits:
- Very good water and moisture barrier
- Multiple structure options (PE or glue lamination)
- Wide grammage range for tailored performance
- Suitable for printing
- Food contact approved
Typical applications:
- Fruit and vegetable packaging
- Plants and agricultural boxes
- Chemical and industrial packaging
- Spare parts and logistics packaging
PET laminate barrier
Walki®Line Ultra
High-performance grease and heat resistant solution
Walki®Line Ultra is designed for demanding applications requiring strong grease resistance and thermal durability, using advanced PET-based barrier technology.
Key benefits:
- Excellent grease and fat barrier (greaseproof)
- Heat resistant with ovenable options
- Suitable for demanding food and technical applications
- Printable on paper or PET surface
- Available in transparent or metallised PET
Typical applications:
- Meat, poultry and seafood packaging
- Bakery and confectionery packaging
- Fast food applications
- Electronics and sensitive goods packaging
Barrier Liner Solid Board Comparison
| Feature | Barrier type | Key Strength | Recyclability | Typical Use |
|---|---|---|---|---|
| Walki®EVO Line | Advanced dispersion coating | Recyclability focus | Paper waste stream | Sustainable packaging |
| Walki®Line Solid | PE coating | Moisture protection | Designed for recyclability | Fresh produce, Industrial |
| Walki®Line Aqua | PE / glue laminate | Enhanced moisture barrier | Designed for recyclability | Plants, industrial |
| Walki®Line Ultra | PET laminate | Grease & heat resistance | Optimised structures | Meat, fish, bakery |
Walki barrier lining solutions for solid board help the value chain deliver reliable product performance while meeting evolving sustainability and recyclability requirements.
Barrier lining is a protective layer applied to solid board packaging to prevent moisture, grease, and contaminants from weakening the structure and affecting product quality.
Solid board loses strength quickly in humid or greasy conditions. Barrier linings maintain compression strength, stability, and durability.
Yes. Solutions such as Walki®EVO Line are designed to be recycled in standard paper waste streams, supporting circular packaging systems.
Food packaging (fresh, frozen, bakery), agriculture, industrial goods, electronics, and chemicals.
They are designed for recyclability, reduced material complexity, and compliance with future PPWR requirements.
Build stronger, recyclable solid board packaging
Looking for the right barrier solution for your solid board application? Our experts will help you design a solution that meets performance requirements and future recyclability targets.
