The present invention relates to anti-microbial, antiviral, fibers, and fabrics and to devices made from said fabrics. The invention has particular utility in connection with personal protective equipment (PPE’s) such as surgical masks and respirators, and will be described in connection with such utilities, although other utilities are contemplated, including, for example for forming air handling filters for people movers, i.e., automobiles, trucks, buses, trains, ships and planes, as well as for forming filters for air handling equipment for buildings.

The present invention relates to a filter media for filtering condensate which includes oily contaminant. The present invention also relates to a filter comprising the filter media. The present invention also relates to a filtration machine comprising the filter media.

Disclosed herein are systems and methods for treating air.

Group of inventions relates to multilayer filtration materials for liquid or gas purification, which can be used purification systems for liquids, for example water from various sources, including drinking water, in ventilation systems or air filtration or for personnel or collective protective equipment production, including respiratory protective equipment, produced based on filtration materials.

Filtration material for liquid or gas purification, consisting of at least two layers, which liquid or gas flows one by one, where first layer is coarse filtration layer and is made on the base of nonwoven fibrous material, and second layer is a fine filtration layer on the base of filtration paper and/or filtration cardboard, characterized in that is configured to sorption filtration of liquid or gas, therein coarse filtration layer contains the particles with size of 2 to 500 mkm, predominantly from 5 to 200 mkm, at least of one type of sorbent, retained in the structure of nonwoven fibrous material, predominantly due to mechanical forces, and the second fine filtration layer contains particles with e size of 0.05 to 20 mkm, predominantly from 0.2 to 5 mkm of at least one fine-dispersed sorbent, retained in the structure of filtration paper and/or filtration cardboard predominantly due to adhesive forces.

Personal protective equipment made as helmet, consisting of body from predominantly transparent polymeric material with air inlet and outlet, collar from elastic polymeric material, and contains at least one air circulation means, therein air inlet and outlet openings are equipped with filters made of filtration material of the claim 1, therein in the inlet filter coarse filtration layer goes first to the environment, and the outlet filter—second fine layer of the filtration material.

Filter media comprising adsorptive particles are generally described. In some embodiments, the adsorptive particles are present in a relatively large amount, in a layer discrete from one or more other layers and/or fiber webs also present in the filter media, and/or in a layer that comprises a relatively low amount of fibers. In some embodiments, the filter media further comprises a non-woven fiber web comprising fibers with relatively small diameters.

An airborne particle removal system includes a wire filter having a housing that includes a wall. The wall has an interior surface and an exterior surface. The wire filter also has a plurality of layers of wires mounted to the interior surface of the wall of the housing. Each layer in the plurality of layers includes a plurality of wires designed to collect airborne particles from air and release the airborne particles. The system also includes a receptacle configured to receive the airborne particles released from the plurality of wires.

A replaceable air filter element has a multilayer filter medium panel configured for mounting on a reusable exoskeleton support frame. The exoskeleton support frame is installable on a flow face of the filter medium panel and is provided with U-shaped locking members configured to detachably engage with and mount the filter medium panel. The exoskeleton support frame is configured to be reused such that only the filter medium panel is replaced, thereby reducing the environmental waste and making for a “green” eco-friendly air filter element.

Disclosed are polyurethane-based foams. The foams may have one or more vicrucidal/bactericidal agents. The foams may be used as filters that capture and/or inactivate viral particles, such as, virions associated with COVID-19. Also described are methods of making the foams and methods of using the foams.

Systems and methods are provided for continuously manufacturing fibrous materials and products, such as filters. A system comprises a conveyor for advancing a substrate comprising fibrous materials from an upstream end to a downstream end, and a feeder for feeding groups of nanofibers into a fluid medium. A fiberization device is coupled to the feeder and configured to convert the groups of nanofibers into individual nanoparticles. A dispersion device coupled to the fiberization device disperses the nanoparticles into the substrate to form a fibrous material. This distributes the nanoparticles more uniformly throughout the fibrous material. In addition, the system continuously manufactures the material to form a product with improved quality, yield and reduced cost and time.

Systems, devices and methods are provided for producing a product comprising fibrous material, such as a filter. A system for manufacturing a product comprises a first device for isolating individual nanoparticles within a gaseous medium and a second device for combining the individual nanoparticles with fibers to form a product containing the fibers and the nanoparticles. This distributes the nanoparticles more uniformly throughout the product and in depth into the internal structure of the product. The nanoparticles increase the overall surface area within the filter media, which increases its filtration efficiency and allows for the capture of submicron contaminants without significantly compromising other factors, such as pressure drop through the filter. In addition, the filters produced with the systems and methods described herein are capable of withstanding rigorous conditioning, which allows a filter to achieve the same level of filtration performance throughout the lifetime of the filter.