A barrier film for a cellulose-based substrate and a method of manufacturing a barrier film

EP4544116A4Pending Publication Date: 2026-06-24STORA ENSO OYJ
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
STORA ENSO OYJ
Filing Date
2023-06-19
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

Microfibrillated cellulose (MFC) films used in packaging suffer from reduced tear strength and poor elasticity, leading to breakage during lamination and converting operations, and require high amounts of plasticizers which can compromise barrier properties and violate regulatory standards.

Method used

A barrier film with a microfibrillated cellulose layer featuring a three-dimensional (3D) pattern, such as a creped pattern, that enhances elongation at break and maintains a low oxygen transfer rate, reducing the need for excessive plasticizers and improving durability during processing.

Benefits of technology

The 3D patterned MFC film exhibits improved stretchability and barrier properties, minimizing the risk of tearing during lamination and converting while maintaining effective gas, oil, and aroma barrier functions, and adhering to regulatory standards by using minimal plasticizers.

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Abstract

The present invention relates to a barrier film for a cellulose-based material, said barrier film comprising at least one microfibrillated cellulose layer (MFC layer), wherein said MFC layer comprises a three-dimensional (3D) pattern.
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