A product and method of manufacturing and producing antimicrobial fibers using an antimicrobial additive material. The method comprising using various antimicrobial metals incorporated and embedded into an inorganic material as metal ions within the additive material that can be formulated into a masterbatch precursor material and processed to manufacture fine or synthetic fibers using standard manufacturing processes for use in applications from face masks and respirators to air filters for HVAC and higher efficiency HEPA applications.

Air purification devices include an air inlet and outlet, upstream and downstream sections in air flow communication with the air inlet and outlet and a filter removably positioned between the upstream and downstream sections to filter at least pathogens from air being passed through the filter. One or more ultraviolet (UV) illuminating sources may be positioned in at least the upstream section proximate the filter to illuminate at least an upstream surface of the filter with sufficient UV radiation to kill viable pathogens that accumulate on the filter. One or more ozone generating sources may be positioned to generate ozone in sufficient concentrations to kill viable pathogens proximate the device. The UV illuminating sources and ozone generating sources may be positioned to provide a predetermined pressure drop across the sources and air flow pattern proximate the filter, and enable the filter to be removed without handling the sources.

A device and a method for removing fats, oils and/or grease (“FOGs”) from water comprise a separator, wherein the separator removes the FOGs that separate from the water under gravity, and a filter wherein the filter removes the FOGs remaining in the water after the water has passed through the separator. The filter comprises several layers having different compositions suitable for removing FOGs from water, including a layer comprising granular activated carbon bonded together and wrapped in polyester.

The present disclosure relates to an antibacterial composition, a filter using the same, and a home appliance such as an air conditioner comprising the filter. More specifically, the antibacterial composition according to the present disclosure comprises a polymer resin, and an antibacterial additive composed of an antibacterial metal and an antibacterial metal oxide, and thus a filter manufactured therefrom has excellent antibacterial activity and also maintains antibacterial performance even if washed.

An object is to provide a blood processing filter favorable in both of the effectiveness (leukocyte removing performance) and the safety (reduction in the amount of elutable substances). The object can be achieved by a blood processing filter comprising a filtration medium including a polyester fiber, wherein a surface area of the filtration medium is 6.0 m.sup.2 or more, and a maximum absorbance of an aqueous extract of the blood processing filter in the range from 240 to 245 nm is 0.03 or less.

An object of the present invention is to provide a chemical liquid purification method which makes it possible to obtain a chemical liquid having excellent defect inhibition performance. Another object of the present invention is to provide a chemical liquid. The chemical liquid purification method according to an embodiment of the present invention is a chemical liquid purification method including obtaining a chemical liquid by purifying a substance to be purified containing an organic solvent, in which a content of the stabilizer in the substance to be purified with respect to the total mass of the substance to be purified is equal to or greater than 0.1 mass ppm and less than 100 mass ppm.

A nonwoven fabric, including fibers, in which the fibers have an elongational viscosity, as measured under conditions at an elongational strain rate of 2.5×10.sup.2 (1/s) and a temperature of 160° C., of from 430 Pa.Math.s to 1200 Pa.Math.s, and a ratio of the elongational viscosity (Pa.Math.s) to a shear viscosity (Pa.Math.s) of the fiber, as measured under conditions at a shear strain rate of 2.5×10.sup.2 (1/s) and a temperature of 160° C., is from 35 to 65.

The invention relates to a fibrous nonwoven, in particular for a filter medium, having a first layer, wherein at least one single-piece fiber strand of said first layer has a first fiber portion and a second fiber portion in the longitudinal direction, and wherein the fiber strand has a thickening substantially in said second fiber portion.

Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The additives are substituted heterocyclic thiolate salts. The heterocyclic thiolate salt has 2 nitrogen groups and a third group that may be an NH, N—NH.sub.2, O, or S group. The substituent group is an aromatic or heterocyclic aromatic group. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

Provided are a sub-micron fibrous membrane in which sub-micron fibers aligned along one axis and sub-micron fibers in a random pattern form a network, and a method for producing the sub-micron fibrous membrane.