Polyamide nanofiber nonwovens
AssigneeAscend Performance Materials Operations LLC
InventorsWai-Shing Yung, Scott E. Osborn, Chris E. Schwier, Vikram Gopal, Albert Ortega
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Abstract
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.
Claims21
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 has a relative viscosity from 4 to 330, and wherein the nanofibers have an average diameter from 100 to 950 nanometers.
A nanofiber nonwoven product comprising a polyamide which is spun into nanofibers with an average diameter from 100 to 950 nanometers and formed into said nonwoven product, 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 has a relative viscosity from 4 to 330.
A method of making a nanofiber nonwoven product, the method comprising:
- (a) providing a polyamide composition, wherein the polyamide has a relative viscosity from 4 to 330 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;
- (b) spinning the polyamide composition into a plurality of nanofibers having an average fiber diameter from 100 to 1000 nanometers and a relative viscosity from 4 to 330;
- and
- (c) forming the nanofibers into the nanofiber nonwoven product, wherein the polyamide nanofiber layer has an average nanofiber diameter from 100 to 950.
A nanofiber nonwoven product comprising a nylon 66 polyamide which is melt spun into nanofibers and formed into said nonwoven product, wherein the polyamide of the nanofibers has a relative viscosity from 4 to 330, a TDI of at least 20 ppm and an ODI of at least 1 ppm.
A nanofiber nonwoven product comprising a nylon 66 polyamide which is melt spun into nanofibers and formed into said nonwoven product, wherein the polyamide of the nanofibers has a relative viscosity from 4 to 330, and wherein no more than 20% of the nanofibers have a diameter of greater than 700 nanometers.
Dependencies are inferred from the claim text.