Sheetlike composite for producing dimensionally stable food and drink product containers having a polymer layer having a ratio of aromatic groups to carbonyl groups

US11878848B2 · kind B2 · utility

Assignee

• SIG Technology AG · CH

Inventors

• Ulrich Lemme · Bedburg, DE
• Andreas Lemsky · Troisdorf, DE
• Dirk Schibull · Baal, DE

Key dates

• Filing date: Nov 8, 2017
• Grant date: Jan 23, 2024
• Expiry date: Jun 21, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2439/70
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a sheetlike composite comprising, as layers of a layer sequence in the direction from an outer face of the sheetlike composite to an inner face of the sheetlike composite, a) a first polymer layer, b) a carrier layer, and c) a barrier layer, wherein the first polymer layer is characterized by a ratio of a proportion of aromatic groups in the first polymer layer to a proportion of carbonyl groups in the first polymer layer in a range from 0.18 to 0.34. The invention further relates to processes for producing a sheetlike composite, a container precursor and a closed container and to the aforementioned process products; to a further container precursor; to a further closed container; and to uses of the sheetlike composite, of a hardener and of a printing ink.