Multilayer film with lamination and heat-sealable sides, and having antifogging properties

US6576348B2 · kind B2 · utility

Assignee

• Wolff Walsrode AG · DE

Inventors

• Holger Eggers · Eindhoven, NL
• Rudi Klein · Walsrode, DE
• Claudia Muller · Trebsen/Mulde, DE
• Rainer Brandt · Walsrode, DE

Key dates

• Filing date: Apr 4, 2001
• Grant date: Jun 10, 2003
• Expiry date: Aug 28, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31928
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A multilayer film having a lamination side and a heat-sealable side is described. The multilayer film comprises, a) an inner layer (i) ethylene/vinyl alcohol copolymer; b) a coupling agent layer (ii) and a separate coupling agent layer (ii′), said inner layer (i) being interposed between and in contact with each of said coupling agent layer (ii) and said separate coupling agent layer (ii′); c) at least one further layer (iii), said separate coupling agent layer (ii′) being interposed between and in contact with each of said inner layer (i) and said layer (iii); d) at least one layer (iv), said coupling agent layer (ii) being interposed between and in contact with each of said inner layer (i) and said layer (iv); and e) a heat-sealable layer (v), said layer (iv) being interposed between and in contact with each of said coupling agent layer (ii) and said heat-sealable layer (v). Layers (i), (ii), (ii′), (iii) and (v) of the multilayer film contain 0.1 to 3 wt. % of a sorbitan monoester, based on the total weight of said multilayer film. Layer (iii) defines the lamination side of the multilayer film, and the heat-sealable layer (v) defines the heat-sealable sid…