Packaging films coated with polyurethane

US5756170A · kind A · utility

Assignee

• BASF SE

Inventors

• Ulrike Licht · Mannheim, DE
• Hermann Seyffer · Heidelberg, DE
• Jens Rieger · Forchheim, DE
• Helmut Kaehs · Niederkirchen, DE
• Rainer Hummerich · Worms, DE

Key dates

• Filing date: Apr 15, 1996
• Grant date: May 26, 1998
• Expiry date: Apr 15, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Packaging films are coated with a polyurethane which bears hydrophilic groups which make the polyurethane water-dispersible and which has a melting point of from 20.degree. to 70.degree. C., with the enthalpy of fusion in this temperature range being at least 20 J/g.