Barrier-coated substrate, laminated packaging material and packaging container including the substrate

JP2025517299A5Pending Publication Date: 2026-05-25TETRA LAVAL HOLDINGS & FINANCE SA
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
TETRA LAVAL HOLDINGS & FINANCE SA
Filing Date
2023-05-15
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Current packaging materials for liquid food cartons, particularly those used for aseptic packaging, rely heavily on aluminum foil for gas barrier properties. However, there is a need for sustainable, cost-effective alternatives that can replicate the barrier properties of aluminum foil while being recyclable and environmentally friendly.

Method used

A method for producing a barrier-coated substrate using reduced graphene oxide, which involves coating a substrate web with an aqueous composition containing a reducing agent and a water-dispersible polymer, followed by the application of graphene oxide flakes. The reduction reaction continues even after drying, providing excellent gas barrier properties without the need for wet treatments or high-temperature processes.

Benefits of technology

The resulting laminate packaging material exhibits superior oxygen barrier properties, making it suitable for long-term aseptic packaging of liquid foods. It is cost-effective, recyclable, and maintains its integrity during processing and storage, addressing the limitations of traditional aluminum foil-based packaging.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to a method for producing a barrier-coated substrate web (10; 25a) coated with a first layer (12a) of a reducing agent and a water-dispersible polymer and a second layer (13a) of reduced graphene oxide. The present invention further relates to a laminate packaging material (20a) comprising the barrier-coated substrate web (10), in particular intended for liquid carton food packaging, and to a liquid carton packaging container made of this laminate packaging material.
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