Patent · US Active

Air-filter media comprising a relofted spunbonded web, and methods of making and using

US11839845B2 · kind B2 · utility

0Cited by

20References

23Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Zhiqun Zhang · Roseville, US
Edward Keith Willis · Goodlettsville, US
Jacob J. Thelen · Minneapolis, US
Daniel E. Johnson · Glenshaw, US
Bryan L. Gerhardt · Woodbury, US
Michael R. Berrigan · Oakdale, US

Key dates

Filing date	Jul 19, 2019
Grant date	Dec 12, 2023
Priority date	—
Expiry date	Nov 15, 2040

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD10B2505/04
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A relofted, spunbonded nonwoven web exhibiting a solidity of from less than 8.0%, to at least 3.0%, and exhibiting a Quality Factor of at least 0.30. Methods of making a relofted web; and, methods of using a relofted web as an air-filtration web, e.g. as a filter media or a layer thereof.

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