Finnish packaging material provider Walki has launched a portfolio of recyclable materials for the frozen food segment.

The materials include Walki EVO Seal, which uses dispersion coating as a barrier against water vapour and grease, and WalkiEVO Seal, which features an optimised polyethylene (PE) extrusion coating.

The recyclable, paper-based packaging products are designed particularly for pillow pouches for frozen foods such as vegetables, seafood and bakery products.

Walki product development head Andreas Rothschink said: “The dispersion coating makes WalkiEVO Seal recyclable in the waste-paper stream without any separation process, while the minimised PE-coating on WalkiOpti Seal makes it suitable to be recycled with paper with an acceptable fibre yield.”

The new range also includes Lamibel MDO-PE, a film-based material for pillow pouches.

Lamibel MDO-PE is made from reverse-printed machine-direction orientation (MDO) film and solvent-free laminated with low-sealing low-density polyethylene (LDPE).

The material is suitable for various kinds of packaging such as doypack, flowpack and pouches for all types of frozen food, including vegetables, sharp-edged seafood and bakery.

Rothschink added: “The stretched film has better optics with high stiffness and mechanical properties than standard PE. The film can also be transparent, allowing the consumer to see the product.”

The range also features Walki Pack Tray, a board-based tray that is fully free of polyethylene terephthalate (PET) and designed to replace aluminium, plastic or plastic-coated trays for frozen ready-made meals.

Walki’s new materials are launched to address the growing demand for frozen food while being fully recyclable in the paper stream.

Walki consumer sales head Dudley Jones said: “Frozen food places high demands on the packaging. It needs to be both sturdy and puncture-resistant to handle diverse situations like pressures of sealing and mechanical tear during transportation.

“The packaging also needs to withstand variability in temperatures as some frozen food is defrosted in its packaging.”