Oriented plastic film having specific surface topography

US4746703A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hermann Dallmann · Wiesbaden, DE
• Walter Seifried · Wiesbaden, DE
• Werner Schaefer · Hofheim, DE
• Siegfried Janocha · Wiesbaden, DE
• Harmut Hensel · Schlangenbad, DE

Key dates

• Filing date: Jan 8, 1986
• Grant date: May 24, 1988
• Expiry date: Jan 8, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

This invention relates to a biaxially or multi-axially oriented, heat set film, which has on its surface numerous unevenesses, which comprise indentations around a protrusion. The protrusions comprise crosslinked or hardened organic particles having an average particle size of from 0.01 to 5.0 microns and having a narrow particle size distribution. The film surface has a mean surface roughness value Ra of from 0.005 to 0.10 micron.