Perforation device

US7386924B2 · kind B2 · utility

Assignee

• Fiberweb Corovin GmbH · DE

Inventors

• Mathias Muth · Wiesbaden, DE
• Axel Richter · Hersbruck, DE
• Ralf Sodemann · Peine, DE

Key dates

• Filing date: Feb 9, 2007
• Grant date: Jun 17, 2008
• Expiry date: Feb 9, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24273
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to perforation device for the manufacture of a perforated nonwoven material, whereby a prebonded nonwoven with embossing points is guided to a nonwoven perforation device, needles of a needle roller engage into the prebonded nonwoven and perforate it, and the perforated nonwoven material then undergoes further processing. A ratio is set between the number of needles to the number of embossed points of between 0.15 and 0.25 and a ratio of hole size to embossed point size of between 0.15 and 0.25.