Shirred filter media and methods of making and using the same
Assignee3M Innovative Properties Company
InventorsNathan E. Schultz, Daniel J. Zillig, Wenli Wang, Zhiqun Zhang
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Abstract
Described herein is method for making a shirred filter media and articles made therefrom, wherein a first series of substantially parallel non-bonded elastic filaments are positioned between a first and a second non-woven porous fibrous web and wherein the first non-woven porous fibrous web is directly bonded to the second non-woven porous fibrous web. At least one portion of the shirred filter media is resiliently extensible under tension. Such shirred articles may be used for the filtering particulates from air or vaporous fluids.
Claims26
A shirred filter media comprising a first series of substantially parallel non-bonded elastic filaments between a first and a second non-woven porous fibrous web, wherein the first non-woven porous fibrous web is directly bonded to the second non-woven porous fibrous web, wherein at least one portion of the shirred filter media is resiliently extensible under tension.
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The method of making a shirred filter media, the method comprising:
- stretching a first series of substantially parallel non-bonded elastic filaments to a first length forming stretched filaments;
- placing the stretched filaments between a first and a second non-woven porous fibrous web forming a multilayered construction;
- bonding the first non-woven porous fibrous web to the second non-woven porous fibrous web with the stretch filaments therebetween;
- and
- releasing the stretched filaments to form the shirred filter media, wherein at least one portion of the shirred filter media is resiliently extensible under tension.
Dependencies are inferred from the claim text.