SPUNBONDED WEB COMPRISING POLYLACTIC ACID FIBERS

USPTO Patent Application US 2017/0241054 A1
Application Date: Aug. 24th, 2017

ABSTRACT

Spunbonded electret webs comprising polylactic acid fibers, in which at least some of the polylactic acid fibers are meltspun, drawn, charged fibers that include charging additive; and, methods of making...
Application Number:
15/506,213
International Classification:
D04H 3/11 (20060101); D04H 3/011 (20060101); B01D 39/16 (20060101); B01D 46/52 (20060101); B01D 46/00 (20060101); D04H 3/14 (20060101); D01D 5/16 (20060101)
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CLAIMS

What is claimed is:

1. A spunbonded electret web comprising polylactic acid fibers, wherein at least some of the polylactic acid fibers are meltspun, drawn, charged fibers that comprise from about 0.1 wt. % to about 5.0 wt. % charging additive, and wherein the web is a through-air bonded web.

DESCRIPTION

BACKGROUND

Electret webs have found use in various applications involving filtration and the like.
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