Patent ID: 8487156
Filing Date: 2013-07-16
Classification: A61F,D04H,Y10T

Abstract:
1. A hygiene article comprising a nonwoven web having an average pore diameter of less than 15 microns and a coefficient of variation in pore size diameter of less than 20%, the nonwoven web comprising a nanofiber layer having at least 35% nanofibers with diameters less than one micron, wherein said nanofibers are a single component homopolymer selected from a group consisting of polyolefin, PLA, PHA, and thermoplastic starch, said nanofibers are made from a melt film fibrillation process comprising the steps of: a. providing polymer in the form of a polymeric melt; b. utilizing a central fluid stream to form an elongated hollow polymeric film tube, c. using a fluid to form multiple nanofibers from the hollow polymeric film tube; and d. providing an orifice having a die collector distance which is optimized to obtain the coefficient of variation in pore size diameter of less than 20%; wherein the hygiene article is selected from the group consisting of diapers, training pants, adult incontinence pads, catamenial products comprising feminine care pads and pantiliners, tampons, personal cleansing articles, personal care articles, and personal care wipes comprising baby wipes, facial wipes, body wipes and feminine wipes, and combinations thereof.