Patent · US Expired

Flat nonwoven fiber aggregate with three-dimensional structure and method for its production

US6723416B1 · kind B1 · utility

12Cited by

5References

10Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Dieter Groitzsch · Hirschberg, DE
Gerhard Schaut · Radebeul, DE
Hans Grimm · Ochsenhausen, DE

Key dates

Filing date	Aug 22, 2001
Grant date	Apr 20, 2004
Priority date	—
Expiry date	Aug 22, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/641
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A three-dimensionally structured fibrous web made up of continuous-filament layers which alternate perpendicular to the surface plane, and denser short-fiber layers that are permanently thermally bonded in a continuous or spot-like manner to the filament layers, the wide-mesh continuous-filament layers representing a scrim, lattice, or netting, has on the short-fiber layers repeating, fold- or wave-shaped elevations. In the manufacturing process, all of the layers of the laminate are subjected together to a shrinkage process at a temperature which lies between the softening and melting points of the scrim material.

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