Polyamide nanofiber nonwovens for acoustic applications
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.
Claims18
1-22. (canceled)
An article for an acoustic application comprising:
- a scrim layer;
- a nanofiber nonwoven layer comprising polyamide nanofibers deposited on the scrim layer, wherein the polyamide nanofibers have a relative viscosity from 4 to 330, and wherein the polyamide nanofibers have an average diameter from 100 to 950 nanometers.
A method of producing an acoustic article comprising:
- (a) feeding a polyamide melt through a die into a high velocity gaseous stream comprising the polyamide composition;
- (b) spinning the polyamide composition into a plurality of nanofibers having an average fiber diameter from 100 to 950 nanometers
- (c) forming the polyamide nanofibers on a scrim layer, wherein the polyamide nanofibers have a relative viscosity from 4 to 330.
Dependencies are inferred from the claim text.