Patent · US Active

Multi-layer composite for use in an air filter

US9180394B2 · kind B2 · utility

0Cited by

13References

9Claims

0Family size

Assignee

Carl Freudenberg KG · DE

Inventors

Heiko Manstein · Speyer, DE
Robert Groten · Sundhoffen, FR
Anthony Hollingsworth · Birkenau, DE
Ingrid Ewald · Hirschberg, DE
Joachim Hendler · Weinheim, DE
Klaus Veeser · Weinheim, DE

Key dates

Filing date	Mar 13, 2008
Grant date	Nov 10, 2015
Priority date	—
Expiry date	Mar 3, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/689
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a multi-layer composite for use in an air filter, comprising at least one upstream ply and a support ply that is connected to the upstream ply. The upstream ply is made of a non-woven fabric and has a finer porosity than the support ply. The aim of the invention is to form and further develop a multi-layer composite for use in an air filter, in particular in a filter bag in such a manner that the upstream ply can be connected in a stable and economical manner to the support ply. The invention is characterised in that the upstream ply is embodied as a spun bonded non-woven, the continuous filaments of which are at least partially twisted or interwoven with the support ply.

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