Metal layer-free multi-layer film with low surface weight

US9289966B2 · kind B2 · utility

Assignee

• MARIA SOELL HIGH TECHNOLOGY FILMS GMBH · DE

Inventors

• Christian Erich Fischer · Bruckberg, DE
• Achim Borm · Bad Nauheim, DE
• Thomas Blum · Fond du Lac, US

Key dates

• Filing date: Dec 4, 2012
• Grant date: Mar 22, 2016
• Expiry date: May 12, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24802
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A metal layer-free multi-layer film with a surface weight of ≦33 g/m2, shrinkage behavior of ≦10% at 90° C. as described herein and a layer structure: a layer (a) composed of at least one thermoplastic olefin homopolymer or copolymer as an outer layer, an adhesive layer (b) inseparable under a cohesion peeling effect, a layer (c) of at least one homopolyamide and/or copolyamide, at least one internal gas barrier layer (d) adjoining layer (c) and differing from layers (c) and (e) in the composition of the polymer component(s), a layer (e) adjoining the gas barrier layer (d) and composed of at least one homopolyamide and/or copolyamide, and a layer (i) of at least one homopolyamide and/or copolyamide as an outer layer. Also disclosed is a method of using such a multi-layer film for the production of a buoyancy/lift body and a buoyancy/lift body made of such a multi-layer film.