Patent · US Expired

Thermobonded and perforated nonwoven

US7192392B2 · kind B2 · utility

2Cited by

6References

2Claims

0Family size

Assignee

Corovin GmbH · DE

Inventors

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

Key dates

Filing date	Jan 14, 2005
Grant date	Mar 20, 2007
Priority date	—
Expiry date	Jan 14, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24273
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The present invention relates to a method 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.