Flexible coated substrate with barrier and heat-sealing properties

A flexible coated substrate with natural materials and heat-sealing polymers addresses curling issues and achieves optimal flatness and sealing properties, simplifying manufacturing and enhancing environmental sustainability.

FR3151311B1Active Publication Date: 2026-04-03GUYENNE PAPIER
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Patent Information

Application Number
FR2023007856
Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-07-21
Publication Date
2026-04-03
Estimated Expiration
2043-07-21

AI Technical Summary

Technical Problem

Conventional coated flexible substrates, particularly those with film-forming polymers, suffer from significant curling issues due to insufficient rigidity, which prevents their industrial use and requires multiple layers for adequate barrier properties.

Method used

A flexible coated substrate is developed with a composition containing at least 90% natural materials, including heat-sealing polymers like carnauba wax, soy wax, beeswax, or rice wax, and polysaccharides, which are biodegradable and provide barrier and heat-sealing properties, eliminating the need for additional adhesive layers.

Benefits of technology

The solution prevents curling and achieves optimal flatness, simplifies the manufacturing process, reduces material usage, and enhances environmental sustainability while maintaining excellent barrier and sealing properties.

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Abstract

Title: Flexible Coated Support with Barrier and Heat-Sealing Properties The invention relates to a flexible coated support (4), intended for the manufacture of a finished product, in particular packaging, the flexible coated support having a flat shape when freely laid flat, this flexible coated support comprising a flexible support containing, by weight, at least 90%, or at least 95%, of a first natural material, this flexible support being coated with a coated layer containing, by weight, at least 50%, or at least 80%, or at least 90%, or at least 95%, of a second natural material formed by at least one heat-sealing polymer, this or these heat-sealing polymers (10) having in particular at least one of the following properties: oxygen barrier, oil / grease barrier, water barrier. Figure for the abstract: Figure 1
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