Perforated laminate

US7390553B2 · kind B2 · utility

Assignee

• Fiberweb Corovin GmbH · DE

Inventors

• Mathias Muth · Wiesbaden, DE
• Joachim Bauer · Hamburg, DE
• Henning Roettger · Kaltenkirchen, DE

Key dates

• Filing date: Jul 3, 2002
• Grant date: Jun 24, 2008
• Expiry date: Feb 15, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/666
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present invention relates to a perforated thermoplastic structure comprising at least a first layer (8) and a plurality of perforations, which extend through the first layer (8). The perforations have a three-dimensional, preferably approximately conical or cylindrical shape (18). A second layer forms an inner surface (20) of the shape (18), whereas the first layer forms an outer surface (21) of the shape (18). The first layer contains a thermoplastic material, whose melting point is lower than a melting point of the thermoplastic material of the second layer.