Unoriented surface-protection film of polypropylene block copolymers

US6803101B1 · kind B1 · utility

Assignee

• tesa AG · DE

Inventors

• Nicolai Böhm · Hamburg, DE
• Ralf Hirsch · Quickborn, DE
• Jobst-Waldemar Klemp · Schenefeld, DE
• Robert Meyer · Hamburg, DE
• Bernhard Mussig · Seevetal, DE

Key dates

• Filing date: Mar 6, 2002
• Grant date: Oct 12, 2004
• Expiry date: Mar 6, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31935
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A self-adhesive protective film having a backing layer and an adhesive layer, characterized in thatthe backing layer is an undrawn film,the backing layer comprises at least one polypropylene block copolymer andthe amount of polypropylene block copolymer makes up from 10 to 95% (w/w) of the protective film.