Multilayer film and its uses

A multilayer film with polyolefin, styrenic block copolymer, and thermoplastic polyester elastomer layers addresses the need for durable, cohesive, and temperature-resistant films, suitable for automotive applications by enhancing bonding and cohesion of substrates.

FR3166576A1Pending Publication Date: 2026-03-27BOSTIK SA(FR)
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Patent Information

Application Number
FR2024010045
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-09-20
Publication Date
2026-03-27

AI Technical Summary

Technical Problem

There is a need for multilayer films that exhibit good mechanical and adhesive properties over time, maintain cohesion without delamination, and withstand high temperatures, while being easy to prepare and cost-effective, particularly for automotive applications.

Method used

A multilayer film comprising an adhesive layer of polyolefin modified by a carboxylic acid, an intermediate layer of styrenic block copolymer, and a barrier layer of thermoplastic polyester elastomer, which can be prepared through coextrusion, ensuring good cohesion, temperature resistance, and bonding of various substrates.

Benefits of technology

The film demonstrates improved mechanical and adhesive properties, maintains cohesion, withstands high temperatures, and is cost-effective, facilitating applications in the automotive industry by bonding diverse substrates effectively.

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Abstract

The present invention relates to a multilayer film comprising: an adhesive layer A comprising at least one polyolefin modified by a carboxylic acid and / or one of its derivatives; an intermediate layer C comprising at least one styrenic block copolymer; a barrier layer B comprising at least one thermoplastic polyester elastomer; and its uses. Figure: None
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