Polymer, polymer microfiber, polymer nanofiber and applications including filter structures
AssigneeDonaldson Company, Inc.
InventorsHoo Y. Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
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Abstract
Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
Claims102
A fine fiber comprising an addition polymer and about 2 to 25 wt. % of an additive, the additive comprising a resinous material having a molecular weight of about 500 to 3000 and an aromatic character, wherein the additive is miscible in the polymer, the fiber having a diameter of 0.01 to 2 microns, the fibers after exposure to air at 140° F. and 100% humidity for 6 hours, at least 50% of the fiber remains substantially unchanged.
A fine fiber comprising a condensation polymer, other than a copolymer of a cyclic lactam and a C6-10 diamine monomer or a C6-10 diacid monomer, and an additive composition having a molecular weight of about 500 to 3000;
- the fiber having a diameter of 0.01 to 2 microns, the fibers after exposure to air at 140° F. and 100% humidity for 6 hours, at least 50% of the fiber remains substantially unchanged.
A fine fiber comprising a fiber having a diameter of about 0.01 to 0.5 micron, the fiber comprising a polymer comprising polyvinyl alcohol and a crosslinking agent.
A fine fiber comprising the reaction product of an addition polymer and a crosslinking agent, the fiber having a fiber size of about 0.01 to 0.5 micron wherein the fiber, when exposed to an air stream having a temperature of about 140° F. and a relative humidity of about 100%, greater than about 50% of the fiber survives for more than 16 hours.
A fine fiber comprising the reaction product of a condensation polymer and a crosslinking agent, the fiber having a fiber size of about 0.01 to 0.5 micron wherein the fiber, when exposed to an air stream having a temperature of about 140° F. and a relative humidity of about 100%, greater than about 50% of the fiber survives for more than 16 hours.
A fine fiber comprising the reaction product of a polyurethane polymer and a crosslinking agent, the fiber having a fiber size of about 0.01 to 0.5 micron wherein the fiber, when exposed to an air stream having a temperature of about 140° F. and a relative humidity of about 100%, greater than about 50% of the fiber survives for more than 16 hours.
A fine fiber comprising the reaction product of a polyurethane polymer and a resinous additive comprising an oligomer having a molecular weight of about 500 to 3000 and an aromatic character wherein the additive miscible in the polymer, the fiber having a fiber size of about 0.01 to 0.5 micron wherein the fiber, when exposed to an air stream having a temperature of about 140° F. and a relative humidity of about 100%, greater than about 50% of the fiber survives for more than 16 hours.
Dependencies are inferred from the claim text.