A filter bag configured for use in a vacuum cleaner is provided. The filter bag includes a first layer of filter material with a selected value of efficiency in removing airborne particulates, and a second layer that is impregnated with silver or a silver compound with antimicrobial properties.

A solid adsorbent fiber includes a solid support fiber that is enveloped by a solidified polymeric binder and also adsorbent particles.

A method of preventing and handling indoor air pollution is disclosed and includes: providing a portable gas detection device to monitor the air quality in the indoor environment; disposing 1?75 gas exchangers within the indoor space to inhale outdoor gas, purify and filter the inhaled gas, and introduce the inhaled gas into the indoor space; and remotely controlling the gas exchangers to enable filtration, purification and gas exchange procedure by the portable gas detection device when the portable gas detection device detects an air pollutant in the indoor space, to reduce the air pollutant in the indoor space under a safe detection value within 1 minute, and form a breathable gas, and the air pollutant in the gas in the indoor space is exchanged and exported out to outdoor environment, the gas exchangers have an exported airflow rate of 200?1600 CADR, and the indoor space has a volume of 16.5?247.5 m.sup.3.

An active force electric field anti-pathogenic fabric is used to remove pathogens from an environment surrounding the fabric. The fabric can be woven into daily clothing items, personal protective equipment, or other clothing items typically worn by a user. The fabric includes a current-carrying mesh that is coated with active materials used to remove pathogens from the air. As such, the fabric operates as an anti-pathogenic material that is used to remove harmful particles from an area surrounding a user. Accordingly, microorganisms, smoke particles, industrial pollutants, odor molecules, allergens are structurally disassociated into harmless protein fragments and natural molecules when encountering the purifying agents in the fabric.

An antibacterial filter, a method for manufacturing the filter, and an air purifier comprising the filter. The antibacterial filter contains a specific range of active copper particles bound to the surface of fibers, and thus can effectively prevent microorganisms, such as bacteria, fungi, and viruses, harmful to the human body, from proliferating on or contaminating the filter surface, and further improve antibacterial performance and sustained antibacterial performance. Additionally, when the antimicrobial filter is applied to an air purifier, it is possible to supply purified air and, at the same time, further improve the durability and lifetime characteristics of the filter.

A particulate filter for use in an exhaust aftertreatment system includes a ceramic substrate and a plurality of ceramic nanofibers associated with pores of the ceramic substrate. The plurality of ceramic nanofibers may be positioned on pores of the ceramic substrate, within pore channels of the ceramic substrate, or both on pores of the ceramic substrate and within pore channels of the ceramic substrate.

Porous and/or curved nanofiber bearing substrate materials are provided having enhanced surface area for a variety of applications including as electrical substrates, semipermeable membranes and barriers, structural lattices for tissue culturing and for composite materials, production of long unbranched nanofibers, and the like. A method of producing nanofibers is disclosed including providing a plurality of microparticles or nanoparticles such as carbon black particles having a catalyst material deposited thereon, and synthesizing a plurality of nanofibers from the catalyst material on the microparticles or nanoparticles. Compositions including carbon black particles having nanowires deposited thereon are further disclosed.

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.

A system and a method of manufacturing continuous glass filament fiberglass media comprises melting glass within a temperature controlled melter. Molten glass exits through orifices in a bushing plate. The resulting fiberglass filaments are received on a rotating drum and sprayed with binder and aqueous solution. The resulting fiberglass mat is placed onto a let-off table then sprayed with aqueous solution before further processing.

A method of bonding a nanofiber web of nanofibers having diameters of between about 50 nanometers and about 2,000 nanometers onto a surface of a woven or nonwoven polymeric media having media fiber diameters of between about 700 nanometers and about 50,000 nanometers utilizes exposing the topmost layer of nanofibers and media fibers to a jet of heated air for a time and at a distance such that substantially only the topmost layer of fibers are bonded. The jet of heated air exits through a nozzle slot having a length of less than about 2 inches in the nanofiber web travel direction. The temperature of the heated air ranges from about 2 to about 10 times the nanofiber melting temperature, and heat air has a nozzle slot velocity of greater than about 500 feet/minute. An adhesive may bond the nanofibers, to a media, which may be bi-component fiber fibers.