Patent · US Expired

Filler fleece material and method of manufacturing same

US4632858A · kind A · utility

10Cited by

2References

13Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Jurgen Knoke · Weinheim, DE
Helmut Jager · Remchingen, DE
Ludwig Dekant · Weinheim, DE
Dieter Groitzsch · Hirschberg, DE

Key dates

Filing date	Oct 30, 1984
Grant date	Dec 30, 1986
Priority date	—
Expiry date	Oct 30, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/641
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The filler fleece material of the invention consists of a laminate of two layers of fleece containing bonding fibers. The thinner layer, which serves as a covering fleece, consists to at least 60% of thermoplastic bonding fibers which melt at the same or a lower temperature than those of the central fleece. This combination makes it possible, after the depositing of the fiber layers and the thermal consolidation of the central fleece, to perform a process for smoothing the cover layer, in which the laminate is exposed in a roller gap to a temperature that is above the fiber melting point of the cover fleece. The filler fleece material of the invention, on account of its smooth yet still sufficiently air-permeable cover layer, is no longer subject to fiber protrusion. Furthermore, the clinging of projecting fibers during application to textile surface materials is reliably prevented.

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