An entrainment-based filtering system for use in connection with a facemask or respirator that includes: a filter housing defining an interior volume comprising at least one airflow pathway having an airflow pathway length that is longer than the length of the interior volume and spaced within the interior volume; and a plurality of entrainment substrates. The plurality of entrainment substrates is positioned within the at least one airflow pathway and the plurality of substrates and the dimensions of the at least one airflow pathway together function to entrain particles on the surface of the chemically coated entrainment substrates and prevent at least 95% of particles traveling through the at least one airflow pathway from exiting the entrainment-based filter.

Respiratory devices and methods for their manufacture and use are disclosed. The device features a resiliently deformable element configured to form a perimeter seal with the inner nostril wall and to swab the distal portion of the internal nostril region with a disinfectant during device installation. A first filter stage includes a first filter layer characterized by first geometric convolutions and a first MPPS1 value; and a second filter stage includes a second filter layer characterized by second geometric convolutions and a second MPPS2 value.

Disclosed is a filter arrangement comprising: a first body, into which an inlet of the first container for containing liquid is inserted and coupled together in a sealing manner, the first body including an inlet, an outlet and a lower face formed on the outlet; a second body, into which an inlet of the second container is inserted and coupled together in a sealing manner, the second body including an inlet, an outlet and an upper face formed on the inlet; a passage fluidly connecting the inlet of the first body, the outlet of the first body, the inlet of the second body and the outlet of the second body; a filter provided on the lower face of the first body and the upper face of the second body; and a plurality of raised bumps provided between the filter and the upper face of the second body.

Respiratory devices and methods for their manufacture and use are disclosed. The device features a resiliently deformable element configured to form a perimeter seal with the inner nostril wall and to swab the distal portion of the internal nostril region with a disinfectant during device installation. A first filter stage includes a first filter layer characterized by first geometric convolutions and a first MPPS1 value; and a second filter stage includes a second filter layer characterized by second geometric convolutions and a second MPPS2 value.

A blood processing filter includes a container having 2 ports respectively functioning as an inlet for a liquid to be processed and as an outlet for the processed liquid, and a filtration medium filled in the container, wherein an airflow resistance of the filtration medium is 55.0 kPa.Math.s/m or more and less than 85.0 kPa.Math.s/m, the filtration medium includes a filter material A having an airflow resistance per unit basis weight of 0.01 kPa.Math.s.Math.m/g or more and less than 0.04 kPa.Math.s.Math.m/g and a filter material B having an airflow resistance per unit basis weight of 0.04 kPa.Math.s.Math.m/g or more, at least a part of the filter material A is disposed on a side closer to the inlet for a liquid to be processed than the filter material B, and a sum of airflow resistances of the filter material A is 6.0 kPa.Math.s/m or more.

A mask according to an embodiment of the present disclosure includes a filter structure provided in a form in which a plurality of members are laminated, and a fiber sheet coupled to a circumferential part of the filter structure and configured to come into contact with a user's face, wherein the fiber sheet may be manufactured using an isotropic fiber sheet.

In one aspect, a composition is disclosed that includes an agglomeration of a plurality of porous microparticles forming a hierarchically porous material structure. The porous microparticles can be formed of a biogenic and/or a synthetic material. In some embodiments, a plurality of binder can be distributed among the microparticles to facilitate the agglomeration of the plurality of the microparticles.

The invention relates to an air filter for an air treatment system of a vehicle and method for manufacturing such an air filter (1), the air filter (1) comprising at least one foam filter element (2), wherein the foam filter material is or comprises a material with inherent electrostatic triboelectric charging characteristics, and to a method for manufacturing such an air filter.

A method for modifying a cellular polymer foam with apparent porosity, which includes providing a cellular polymer foam with apparent porosity, placing the cellular polymer foam in contact with at least one compound in order to obtain a cellular polymer foam including on the surface thereof an intermediate phase formed from the compound having at least one catechol unit. The foam may be used as a catalyst substrate.

The present application relates to an integrated washer-dryer, including a box body, an inner and outer drum assembly installed in the box body, a drying air duct provided between the box body and the inner and outer drum assembly, and a heat exchange device provided in the drying air duct. An air inlet and an air outlet of the drying air duct are both in communication with the inner and outer drum assembly, the air inlet is configured with a first filter member, and a second filter member is provided between the first filter member and the heat exchange device. A water spray nozzle is provided within the drying air duct, and the water spray nozzle is provided between the first filter member and the second filter member, and is used for washing off debris trapped on the first filter member.