This invention relates to a method of manufacturing a superabsorbent polymer fiber and a superabsorbent polymer fiber manufactured thereby.

A material comprising unique nanofiber layers, and more particularly, this invention relates to a method for creating a material that is made from multiple unique nanofiber layers that can be utilized as filter media among other applications. The nanofiber layers have a plurality of fine fibers with an average diameter of less than 1 micron. In embodiments, the fine fibers are formed from a polymer. The material can be created according to a method in which the fine fiber strands are formed from a polymer melt or a polymer solution. The fine fibers can then be layered on top of one another to form materials such as filter media.

In embodiments, the present invention provides a plurality of fine fiber strands made from a first polymer and a second polymer where the second polymer has a higher molecular weight than the first polymer. In preferred embodiments, the fine fiber strands have an average diameter of less than 2 micron, and the fine fiber strands have a length of at least 1 millimeter.

A material comprising a fine fiber pulp is provided. The fine fiber pulp has a plurality of fine fibers have an average diameter of less than 1 micron and an average length of less than 1 millimeter. In embodiments, the fine fibers formed of a polymer. The material can be created according to a method in which the fine fiber strands are formed from a polymer melt or a polymer solution, the fine fiber strands are cooled to a temperature of less than −25° C. to increase brittleness of the fine fibers, and the fine fiber strands are granulated into the fine fiber pulp.

A functionalized fine fiber is provided. In an embodiment, the functionalized fine fiber is usable in chromatography. The functionalized fine fiber includes a matrix of fine fiber. The fine fibers preferably have an average diameter of less than 2 micron, and each fine fiber preferably has a length of at least 1 millimeter. The fine fibers carry and immobilize functional molecules.

A functionalized fine fiber is provided. In an embodiment, the functionalized fine fiber is usable in chromatography. The functionalized fine fiber includes a matrix of fine fiber. The fine fibers preferably have an average diameter of less than 2 micron, and each fine fiber preferably has a length of at least 1 millimeter. The fine fibers carry and immobilize functional molecules.

Among other things, the inventive subject matter generally relates to bulk fill materials suitable for an insulative or cushioning material. The bulk fill material consists of a plurality of discrete units comprising clusters or loose webs of fibers. The fibers consist of superfine fibers and/or fibers in a range of 1 to 5 denier; the fibers being entangled to form the clusters or loose webs. In some embodiments the clusters or webs are multinode fiber structures that mimic natural down. The inventive subject matter is also directed to related methods of production.

Among other things, the inventive subject matter generally relates to bulk fill materials suitable for an insulative or cushioning material. The bulk fill material consists of a plurality of discrete units comprising clusters or loose webs of fibers. The fibers consist of superfine fibers and/or fibers in a range of 1 to 5 denier; the fibers being entangled to form the clusters or loose webs. In some embodiments the clusters or webs are multinode fiber structures that mimic natural down. The inventive subject matter is also directed to related methods of production.

Articles, such as sanitary tissue products, including fibrous structures, and more particularly articles including fibrous structures having a plurality of fibrous elements wherein the article exhibits differential cellulose content throughout the thickness of the article and methods for making same are provided.

Articles, such as sanitary tissue products, including fibrous structures, and more particularly articles including fibrous structures having a plurality of fibrous elements wherein the article exhibits differential cellulose content throughout the thickness of the article and methods for making same are provided.