A system and method of forming fiberglass air filtration media is disclosed which does not require the use of oil additives. A mixture of resin binder, polymer, and dry adhering agent is formed and applied to the fiberglass as it spins onto the drum. Additionally, the fiberglass filtration media density can vary such that the fiber on the air inflow is less dense than the fiber on the air outflow. After oven curing, the finished air filtration media has an improved ability to attract and hold dust and other contaminants.

A filter member has a filter that exhibits a long filter life and can maintain a particle concentration in a particle-containing liquid being filtered. The filter member has a filter that has an opening diameter that is smaller than the diameter of the filtration target contained in the particle-containing liquid. This filter is formed by a carbodiimide compound-treated fiber from an amide-based fiber that contains the amide bond and has a carboxyl group and/or amino group functional group.

Disclosed herein is a molecular imprinted protective face mask comprising a supportive structure, a surface material that receives and retains a molecular imprint and that is positioned to contact airborne molecules during use, a molecular imprint of a bioactive molecule wherein an imprinted cavity is at least one of a bioactive molecule with a molecular configuration that captures a specific airborne and/or microdroplet-borne molecule and a protein with a binding site that captures a specific molecule.

A filtration material comprising a blend of polypropylene and acrylic fibers of round, flat, dog bone, oval or kidney bean shape in any size from 0.08 to 3.3 Dtex. A preferred blend contains about 50 weight percent polypropylene fibers and about 50 weight percent acrylic fibers. The fibers can be blended ranging from 90:10 to 10:90 polypropylene to acrylic. The shape contains 25 weight percent round, flat, oval, dog bone and kidney bean shapes. The fiber blend contains 25 weight percent of at least one size between 0.08 and 3.3 Dtex. Electret fibers incorporated within these blends have 0.02 to 33 weight percent of a charge control agent. These fibers can be used in producing electret material by corona or triboelectric charging methods.

A retaining material that can sufficiently maintain the function of retaining a pollution control element in a pollution control device at high temperature. In one aspect, the retaining material has a mat shape and contains inorganic fiber material, with the retaining material containing: a surface layer containing inorganic colloid particles; and an internal region positioned further to the inside than the surface layer, impregnated with inorganic colloid particles and organic binder; wherein the surface layer contains inorganic colloid particles at a higher concentration than the internal region; and the amount of inorganic colloid particles in the internal region is 1 mass % to 10 mass % based on the total mass of the retaining material.

A filtration material is disclosed that may include a first layer comprising a first three-dimensional network of fibers including a first plurality of cells, including an extracellular matrix comprising -glucan and chitin. The filtration material may include a second layer fluidly downstream of the first layer comprising a second three-dimensional network of fibers including a second plurality of cells, including an extracellular matrix including -glucan and chitin and the second layer may be adhered to the first layer. The first layer and the second layer may be coated with a polymer mixture including a polymer configured to mitigate exposure of the first and second three-dimensional network of fibers to glucanases and chitanases and further resist thermal degradation below a predetermined temperature. The polymer mixture may further include an antioxidant at an amount sufficient to mitigate the polymer from thermally degrading below the predetermined temperature.

The invention relates to a method for adapting a filter medium to predefinable parameters, such as electrostatic charge, flow-rate behaviour, dynamic pressure behaviour or differential pressure behaviour, fraction filtration efficiency and preservation of a constant quantity and quality of fluid additives. Said method is characterised in that at least one of the aforementioned parameters is adapted by the targeted influencing of the surface energy of the filter medium (18).

Filter media and filters are provided having a fibrous web including first and second dissimilar electret fibers ultrasonically bonded to each other. The first and second electret fibers may be directly bonded to each other without needle punching, which substantially maintains the thickness or loft of the fibrous web of the filter media and filters. Maintaining the thickness or loft of the fibrous web during the bonding process decreases the pressure drop across the filter media and increases its dust holding capacity. Medical grade filters and/or self-supporting (i.e., self-pleatable) air filters are also provided. The medical grade filters and/or self-supporting air filters may include one or more support layers ultrasonically bonded to the fibrous web or fiber layers without needle punching, which maintains the stiffness of the support layers and allows the filter to be produced in a single manufacturing step.

An air filtering cover is configured to engage over an infant carrier to filter air communicated into an interior cavity thereof. A cover body has a top wall having a pocket with two sidewalls and a filter element and form a flowpath for air communicating through the body and filter to remove dirt, dust, and pathogens from air reaching the occupant of the interior cavity. The filter may be replaceable within a pocket formed in the cover body. A gauge strip may be positioned on the filter which changes in appearance when the filter needs replacement.

A cooking oil degradation suppression filter that can effectively and easily suppress degradation of cooking oil without using a filter aid or the like and can prevent a decrease in the taste of food caused by separation of a degradation suppression agent. The cooking oil degradation suppression filter includes fiber (10) and at least one degradation suppression agent (13) selected from a carbonate, a silicate, a tartrate, an oxide, a hydroxide, an alginate, and a phosphate.