Patent · US Expired

Non-wovens of electret fiber mixtures having an improved charge stability

US5726107A · kind A · utility

45Cited by

2References

16Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Jorg Dahringer · Bobingen, DE
Ernst-August Albers · Göttingen, DE
Werner Groh · Lich, DE
Achim Heyer · Hattersheim, DE

Key dates

Filing date	Aug 28, 1995
Grant date	Mar 10, 1998
Priority date	—
Expiry date	Aug 28, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/698
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A non-wovens fabric of electret fibers having an improved charge stability and comprising materials which chiefly comprise a fiber-forming addition or condensation polymer and 0.01 to 30% by weight (preferably 0.01 to 10, in particular 0.1 to 5, % by weight), based on the weight of the material, of organic or organometallic charge control agents, wherein the non-woven fabric comprises at least two types of electret fiber which are made of different materials which differ from one another in that they comprise different fiber-forming addition or condensation polymers and if appropriate also different charge control agents is described.

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