A thermally bonded filtration media that can be used in high temperature conditions in the absence of any loss of fiber through thermal effects or mechanical impact on the fiber components is disclosed. The filter media can be manufactured and used in a filter unit or structure, can be placed in a stream of removable fluid, and can remove a particulate load from the mobile stream at an increased temperature range. The combination of bi-component fiber, other filter media fiber, and other filtration additives provides an improved filtration media having unique properties in high temperature, high performance applications.

The present invention relates to the field of water treatment/fluoride removal and to materials/devices useful in such processes. Specifically, the invention provides for hybrid materials comprising amyloid fibrils and ZrO2; and to composite materials further comprising a support material. The invention further provides for the treatment of water using such hybrid or composite materials.

A protective barrier having antimicrobial and antiviral properties. The protective barrier comprises a filtration media structure. The filtration media structure comprises inner melt blown nonwoven filtration media, an outer melt blown nonwoven filtration media, and a channeling layer. The channeling layer is sandwiched between the inner and outer filtration media layers. The channeling layer comprises a plurality of filaments. Each filament is constructed having a non-round cross-section. The filaments are arranged in a three-dimensional (3D) structure configured to disturb laminar flow through the protective barrier. The protective barrier may further comprise an inner layer and an outer layer encapsulating the filtration media structure.

A method includes: using a planar substrate having at least one acid-functionalized layer including at least one first acid having a pks1 value of 0 to 7 and at least one different second acid or derivative thereof selected from a group consisting of C.sub.8 to C.sub.18 fatty acids, esters, amides, and mixtures thereof, as a filter medium for depleting viruses from air and other gases.

A filtration media with improved filtration, strength, tear resistance and air permeability in the form of a relatively thin and lightweight wet-laid fibrous web that has a wet Mullen ratio of 60% to 80% to ensure that the media is flexible enough to be formed into a fluted structure, and strong enough to retain the fluted structure when wound into a roll and to permit further processing without the media becoming too brittle. The filtration media comprises a blend of cellulose and synthetic fibers having a weight percent of 81 wt % to 87 wt % of a weight of the media and a resin binder having a weight of 13 wt % to 19 wt % (preferably about 16 wt %) of the weight of the media.

An air scrubber/purifying filter includes filter material having a substrate, an adhesive coating applied to the substrate and a plurality of flock fibers flocked into the adhesive coating. In one embodiment, bi-component flock fibers are flocked on a Reticulated Foam (RF) substrate and subsequently fibrillated. In another embodiment, Cross-Flow Flock Fiber (CFF) filter material includes edgewise, cross cut, bonded, stacked fabric layers such that the passage of air through the flock fibers is normal to the flock fiber orientation. In some embodiments the flock fibers are coated with biocidal, virucidal and/or metalized coatings or finishes to provide biocidal or virucidal properties to the filter media.

Filter media and filters, such as air filters, face masks, gas turbine and compressor air intake filters, panel filters and the like, are provided that include nanoparticles dispersed throughout at least a portion of the filter media. A filter media comprises a fiber substrate with a first surface and an opposing second surface. The filter media includes nanoparticles disposed within the fiber substrate at least between the first and second surfaces such that an area density of the nanoparticles decreases from the first surface towards the second surface. This density gradient formed by the nanoparticles through at least a portion of the substrate improves the performance characteristics of the filter. The nanoparticles increase the overall surface area within the fiber substrate, which may increase its filtration efficiency and allows for the capture of submicron contaminants without significantly compromising other factors, such as pressure drop or air flow through the filter.

This disclosure describes filter media and mask filters and face mask systems including those filter media. In one aspect, the filter media includes a fibrous media including multi-component binder fibers, glass fibers, and microfibrillated cellulose fibers. In some aspects, the fibrous media further includes PET fibers. In another aspect, the filter media includes an electrostatically charged filter media, a fine fiber layer, and a scrim. In yet another aspect, the filter media includes two fine fiber layers, and two scrims. In additional aspects, the filter media includes bicomponent fibers, polyethylene terephthalate fibers, and microfibrillated cellulose fibers. In a further aspect, the filter media includes a support layer, a continuous fine fiber layer, and an efficiency layer. Combinations and composites of the filter media are also contemplated.

In one aspect, the disclosure relates to filtration layers comprising nanostructures, methods of making the same, and devices incorporating the same. In one aspect, the filtration layers allow for air flow while blocking passage of sub-micron-sized particles including viruses and environmental pollutants. In another aspect, the filtration layers are biocompatible, flexible, stable over a wide temperature range, and compatible with standard disinfection techniques. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

An erosion, sediment and pollution control product comprises a geotextile which includes cellulose based threads treated to be hydrophobic and cellulose based filler within the tubular geotextile. The geotextile may be knitted and may include lyocell threads and wherein the lyocell threads are treated to be hydrophobic, and are treated with food grade mineral oil. A method of making a tubular knitted geotextile comprises the steps of: supplying cellulose based threads to a circular knitting machine and knitting a tubular substrate, treating the cellulose based threads with one of mineral oil, beeswax, paraffin, petroleum jelly, lanolin, plant-based oils, and combinations thereof, whereby the threads are rendered hydrophobic.