Polyamide nanofiber nonwovens for filters
AssigneeAscend Performance Materials Operations LLC
InventorsWai-Shing Yung, Scott E. Osborn, Chris E. Schwier, Vikram Gopal, Albert Ortega, Joseph L. Menner
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Abstract
A filter comprising a nanofiber nonwoven product is disclosed which comprises a polyamide with a relative viscosity from 2 to 330, spun into nanofibers with an average diameter of less than 1000 nanometers (1 micron). In general, the inventive products are prepared by: (a) providing a polyamide composition, wherein the polyamide has a relative viscosity from 2 to 330; (b) melt spinning the polyamide composition into a plurality of nanofibers having an average fiber diameter of less than 1 micron, followed by (c) forming the nanofibers into the product.
Claims19
A filter product comprising one or more layers of a nanofiber nonwoven product, comprising polyamide nanofibers, wherein the polyamide of the nanofibers comprises at least one of N6, N66, N6T/66, N612, N6/66, N6I/66, N66/6I/6T, N11, N12, or combinations thereof, wherein “N” means Nylon, wherein the polyamide of the nanofibers have a relative viscosity from 4 to 330, and wherein the nanofibers have an average diameter from 100 to 950 nanometers.
A breathing filter product comprising:
- a support layer;
- and
- one or more layers of a nanofiber nonwoven product disposed on the support layer, wherein the nanofiber nonwoven product comprises polyamide nanofibers, wherein the nanofibers have an average diameter from 100 to 950 nanometers, and wherein the nanofiber nonwoven product has a TDI of at least 20 ppm and an ODI of at least 1 ppm.
Dependencies are inferred from the claim text.