A rigid, channel-framed, pleated air filter, with a plurality of linear bridging filaments on at least an upstream face of the pleated air filter media of the filter.

An air purification system includes a conduit extending between an inlet and an outlet, each in fluid communication with an enclosed environment. Ambient air from the enclosed environment enters the conduit via the inlet and treated air exits the conduit and enters the enclosed environment via the outlet. The system further includes a fibrous filter disposed within the conduit and configured to treat the ambient air thereby generating the treated air, and a renewal unit disposed within the conduit and configured to renew the fibrous filter.

The instant invention, in one aspect, provides a process for decontaminating water to remove contaminants, said process comprising passing contaminated water through a filter comprising a plurality of filtering elements capable of lowering the contaminants by at least 70%. In another aspect is provides a filtering unit comprising a plurality of filtering elements arranged in individual layers, said individual layers independently selected from brick chips, hemp fibers, mixture of hemp fibers and charcoal, agave, jute fibers, sand, filter paper, and gravel.

This invention provides a composition and aqueous dispersion comprising magnesium oxide, as a sole active agent or in combination with ammonium phosphate/ammonium polyphosphate for imparting anti-bacterial and/or anti-viral properties to textile products. The present invention further provides methods for preparing such compositions and aqueous dispersions and methods of using the same for textile finishing.

The invention provides a respirator mask comprising a filter material piece made of an air-permeable material and at least one securing band, wherein the air-permeable material comprises at least one layer of a non-woven fabric and the layer of a non-woven fabric is creped, and wherein the at least one securing band is designed for securing the respirator mask to the head.

Provided is an antiviral filter medium. An antiviral filter medium according to one embodiment of the present invention includes a first member provided with an antiviral coating layer formed of fibers and including, on part or all of the outer surface of the fibers, an antiviral fusion protein in which an antiviral motif is bound to an adhesive protein. Accordingly, the antiviral filter medium exhibits antiviral properties, is excellent in filtration efficiency and ventilation amount (or flow rate), and has low pressure loss. In addition, the antiviral filter medium is characterized in that the coating layer exhibiting antiviral properties retains adhesiveness for a long period of time after being attached to the surface. Moreover, the antiviral filter medium can retain antiviral activity for a long time without loss of the antiviral activity due to external conditions during production, storage, and use.

Disclosed herein, among other things, is an improved filter media construction that comprises multiple layers for improved odor control that can be used for vacuum cleaner air filtration cartridge applications. The filter media comprises anti-microbial ePTFE HEPA filter media to prevent mold growth. The filter media may also be used for air cleaner filtration, central air filtration for home and industrial buildings (HVAC), cleanrooms, and microelectronic devices. In an embodiment, the improved filter media construction comprises at least a PTFE layer, a bi-component layer, and a base layer. In an embodiment the PTFE layer comprises ePTFE. In an embodiment, the bi-component layer comprises non-woven polyethylene/polyethylene terephthalate (PE/PET). In yet another embodiment, the base layer comprises activated carbon. Other aspects and embodiments are provided herein.

A filter medium includes first and second porous films mainly containing fluororesin, and a pre-collection member upstream of the first film. The second film is downstream of the first film. The pre-collection member has a pressure drop when air is passed through at a flow rate of 5.3 cm/s of between 15 Pa and 55 Pa, a collection efficiency of NaCl particles having a particle diameter of 0.3 μm when air containing the particles is passed hrough at a flow rate of 5.3 cm/s of between 25% and 80%, a thickness of 0.4 mm or less, and a PF value between 7 and 15. The PF value={−log((100−collection efficiency (%))/100)}/(pressure drop (Pa)/1000). A ratio of the PF value of the pre-collection member to the PF value when the first and second films are overlapped, is between 0.20 and 0.45. The filter medium can be used in a filter pack or filter unit, and may be produced by integrating the first and second films and the pre-collection member using heat lamination.

The present invention relates to an adsorption filter including activated carbon and a fibrillated fibrous binder, in which the activated carbon has a 0% particle diameter (D0) of 10 μm or more in a volume-based cumulative particle-size distribution and has a 50% particle diameter (D50) of 90 to 200 μm in the volume-based cumulative particle-size distribution; the fibrillated fibrous binder has a CSF value of 10 to 150 mL; and the adsorption filter includes 4 to 8 parts by mass of the fibrillated fibrous binder relative to 100 parts by mass of the activated carbon.

The technology disclosed herein relates to filter assemblies and methods of making filter assemblies. One filter assembly has a first sheet of filter media having a first perimeter region and a second sheet of filter media having a second perimeter region. The first perimeter region and the second perimeter region are bonded in a rim region. A plurality of adsorbent beads are disposed between the first sheet of filter media and the second layer of filter media, and a substantial portion of the plurality of adsorbent beads are unbonded. Other embodiments are also described.