Articles and methods involving filter media are generally provided. In certain embodiments, the filter media includes at least a first layer, a second layer, and an adhesive resin positioned between the first layer and the second layer. In some embodiments, the first layer may be a pre-filter layer or a support layer. The second layer may, for example, comprise fibers formed by a solution spinning process and/or may comprise fine fibers. In some embodiments, the adhesive resin may be present in a relatively low amount and/or may have a low glass transition temperature. The filter media as a whole may have one or more advantageous properties, including one or more of a high stiffness, a high bond strength between the first layer and the second layer, a high gamma, and/or a low increase in air resistance after being subjected to an IPA vapor discharge. The filter media may be, for example, a HEPA filter and/or an ULPA filter.

A pillar shaped honeycomb structure includes: a porous partition wall that defines a plurality of cells, the cells forming flow paths for a fluid, the cells extending from an inflow end face to an outflow end face; and an outer peripheral wall located at the outermost circumference. The cells include: a plurality of cells A wherein a side of the inflow end face is opened and the outflow end face has a plugged portion; and a plurality of cells B wherein a side of the outflow end face is opened and the inflow end face has a plugged portion, the cells B being arranged alternately with the cells A. One or both of the plugged portion of the cells A and the plugged portions of the cells B contain a magnetic substance and glass.

The disclosure discloses an anti-haze anti-harmful gas air filter membrane as well as a preparation method and application thereof. The air filter membrane comprises a nano fiber membrane made of nano fibers and having a two-dimensional or three-dimensional network structure. The nano fiber membrane can be a high-molecular polymer nano fiber membrane prepared by utilizing an electrostatic spinning process, and can also be doped with an organic or inorganic additive capable of adsorbing and absorbing harmful gases, such as VOCs, NO.sub.x, SO.sub.x and NH.sub.3, in the air and/or a photocatalyst capable of degrading these harmful gases in a photocatalysis manner, or the like. The anti-haze anti-harmful gas air filter membrane disclosed by the disclosure can efficiently filter PM2.5 and PM10 particulate pollutants and the like in the air and simultaneously can efficiently identify and clear multiple harmful gases in the air. The anti-haze anti-harmful gas air filter membrane has a wide application prospect in the field of air purification, for example, can be applied to air purification devices, such as screen windows, gauze masks and filter screens.

The present invention relates to an air filter using glass and aluminum substrates coated with a photocatalyst and a manufacturing method therefor. Disclosed is an air filter, which is more efficient in removing organic gas from air by using optical properties of a glass material and surface reflectance of an aluminum metal material to actively utilize the transmission and reflection of the light that is limitedly provided.

A system and method for laminating filter media can include applying an adhesive to a layer of the filter media and curing the adhesive. A multilayer filter assembly can include a first and a second layer laminated together using an inorganic adhesive.

The present invention relates to an air filter using glass and aluminum substrates coated with a photocatalyst and a manufacturing method therefor. Disclosed is an air filter, which is more efficient in removing organic gas from air by using optical properties of a glass material and surface reflectance of an aluminum metal material to actively utilize the transmission and reflection of the light that is limitedly provided.

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.

A system and method for laminating filter media can include applying an adhesive to a layer of the filter media and curing the adhesive. A multilayer filter assembly can include a first and a second layer laminated together using an inorganic adhesive.

The present invention relates to a dust collecting filter and a process for manufacturing the same. Specifically, according to an embodiment of the present invention, the filter medium contained in a dust collecting filter comprises a first nonwoven fabric layer, a porous layer, a second nonwoven fabric layer, and a polypropylene melt-blown layer sequentially laminated, wherein the melt-blown layer has a melt index and a basis weight in specific ranges, and the first nonwoven fabric layer and the second nonwoven fabric layer have a sum of the basis weights in a certain range, whereby it is possible to enhance the sustainability, processability, and bendability of the filter medium, enhance the workability at high temperatures and adhesion, and further enhance the durability and life span characteristics of the filter.

Filter media and filters are provided that include at least two layers and a plurality of nanoparticles dispersed in depth within at least one of the layers. A gas filter comprises a first layer of fibers, a second layer of fibers bonded to the first layer and a plurality of nanoparticles incorporated into the first layer. The nanoparticles increase the overall surface area within the filter, which increases its filtration efficiency and allows for the capture of submicron contaminants without significantly compromising other factors, such as pressure drop (i.e., air flow) through the filter. In addition, the filters disclosed herein are capable of withstanding rigorous conditioning, which allows the filter to achieve the same level of filtration performance throughout the lifetime of the filter. Systems, devices and methods are also provided for manufacturing such filters.