Patent · US Active

Filter medium for particulate filtration

US8709138B2 · kind B2 · utility

3Cited by

8References

16Claims

0Family size

Assignee

Carl Freudenberg KG · DE

Inventors

Alexandra Lazarevic · Weinheim, DE
Robert Bader · Toronto, CA
Rosemarie Kurzer · Kaiserslautern, DE
Heinz Reinhardt · Chadds Ford, US

Key dates

Filing date	Oct 5, 2009
Grant date	Apr 29, 2014
Priority date	—
Expiry date	Mar 15, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/699
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter medium including a carrier layer and a microfiber layer applied thereon is characterized in that, with respect to the aim of providing a filter medium which has a relatively low pressure drop, and at the same time a good fraction separation rate and excellent dust storage capacity, the carrier layer has first fibers, which are designed as endless bicomponent fibers and spunbonded fibers, and the microfiber layer has second fibers, which are designed as endless melt-blown fibers.

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