The present invention relates to a sheet filter material, in particular having an aerosol filter function and/or a particle filter function, preferably having a protective function against chemical, biological and/or chemical harmful and toxic substances, and to a method for the production thereof. The sheet filter material is particularly suitable for producing protective equipment, protective objects, sports and leisure clothing and filters and filter materials of all types.

A filter media pack with pleat folds, pleat panels and a plurality of glue bead sections is provided. The glue bead sections provide increased rigidity, dimensional stability and maintain spacing between adjacent pleat panels. Methods of manufacturing the filter media packs are provided. Filter elements including the filter media packs are contemplated.

Nanomaterials (100) in particular HEPA air filter media. One embodiment is a nanomaterial (100) that includes a plurality of nanofibers (140) that form a randomly interwoven network defining three-dimensional pores (160) therein. The nanomaterial further includes a plurality of beads (120) with a bead diameter of 2-20 m that are distributed randomly within the plurality of nanofibers (140). The beads (120) support the nanofibers (140) to prevent the pores (160) from collapsing.

The present invention is directed to a hybrid filter for filtering out fine and ultrafine dust. The hybrid filter, in which cellulose nanofibers are adhered to a porous support by an aqueous binder, according to the present invention is a hybrid filter that is not a conventional filter having a multilayer structure but a filter having a single layer. The hybrid filter according to the present invention has low airflow resistance and excellent fine pollutant filtration rate.

A filter may remove PM.sub.2.5 and/or other airborne pollutants, which filter has fibers of an average diameter of no more than 500 nm, the fibers of at least 90 wt. % polyacrylonitrile, relative to all fibers in the filter; and a catalyst of at least 90 wt. % TiO.sub.2, relative to all catalytic metals in the filter, dispersed onto the fibers. The fibers need not be charged. The TiO.sub.2 may be condensed or precipitated onto the fibers out of a liquid containing the TiO.sub.2 and the fibers by simple methods. The catalyst may be activated by UV irradiation to decompose particulate matter having an average particle size of 2.5 m or less, i.e., PM.sub.2.5, and/or other airborne pollutants from air. Such filters may be implemented around areas of vehicle traffic, e.g., as elements of traffic lights, and may be used to controllably purify polluted air.

A present invention is directed to a laminated filtration media comprising a nanofiber coating applied onto a synthetic substrate. Generally, the laminated filtration media can be produced by applying the nanofiber layer onto the synthetic substrate via an electrospinning process and then thermo-mechanically bonding the nanofiber layer onto the synthetic substrate via a thermal bonding process. The laminated filtration media exhibits superior durability and can be used in a wide array of air filtration applications.

Provided is a nanofiber vent device for a urea water tank including a filter unit for discharging gas generated in the tank main body and preventing external dust, foreign matter, and moisture from flowing into the tank main body, as a vent device that is installed in a tank main body storing urea water and discharging gas inside the tank main body to the outside.

A fabric material composite construction, for use as a filter means or media, characterized in that said construction comprises a combination of one or more nanofiber layers and a synthetic single-thread squarely knitted precision fabric.

The present disclosure relates to a fluid modification system having a container structure and a plurality of independent, ceramic elements. The ceramic elements may be arranged in random orientations and contained in the container structure, thus causing a fluid flow entering the container structure at any given cross-section location to flow over the surfaces of a first subplurality of the ceramic elements, and through the porous walls of a second subplurality of the ceramic elements, before exiting at a second location of the container structure. Each one of the ceramic elements has at least one of a nanofibrous or nanoporous microstructure to enable internal flow both through a wall structure thereof, and over and around the wall structure to affect performance.

The present disclosure relates to a modular fluid modification system having an outer container configured to permit a fluid flow there into at a first location, and to allow the fluid flow to exit the container at a second location spaced apart from the first location. A plurality of fluid contacting elements is housed in the outer container. The fluid contacting elements each form an independent filtering or reactor element. Each fluid contacting element includes a plurality of openings formed in a grid or lattice-like pattern.