The present invention relates to the field of air filtration, in particular to a polytetrafluoroethylene composite filter material and a preparation method and uses thereof. The polytetrafluoroethylene composite filter material comprises a support layer and a polytetrafluoroethylene microporous membrane layer, and the support layer and the polytetrafluoroethylene microporous membrane layer are compounded by an adhesive, wherein the adhesive comprises a two-component polyurethane adhesive, a pore forming agent and an inorganic filler. The present invention adopts a two-component solvent-free polyurethane adhesive, and by adding a low-temperature pore forming agent and an inorganic filler, the pore forming agent forms an irregular pore channel structure at the bonding interface during curing, and the inorganic filler prevents the adhesive from entering the micropores of the polytetrafluoroethylene membrane, so that the air permeability and filtration efficiency of the polytetrafluoroethylene microporous membrane are not affected after compounding; and the prepared polytetrafluoroethylene composite filter material has good air permeability, high peel strength, good filtration efficiency and good barrier effect.

Compositions and articles comprising a non-woven matrix for use as anti-microbial filters are provided. In some embodiments, the non-woven matrix comprises nanofibers suitable for capturing a droplet comprising a microbe (e.g. a virus particle). In some embodiments, the non-woven matrix comprises a biocide suitable for reducing propagation and/or inactivating a microbe.

The present invention is a particulate filter face mask with replaceable filter element, the filter element being inexpensive, easily replaceable and securely held within the mask when installed.

The present invention is a particulate filter face mask with replaceable filter element, the filter element being inexpensive, easily replaceable and securely held within the mask when installed.

Disclosed herein are systems and methods for treating air.

An improved device for use in decreasing the transmission of viral and pathogenic materials by capturing the bodily fluids after a wearer sneezes. The device includes a housing having a bottom portion, a cover, and a base. The bottom portion having receiving members 28 for housing a filter and ventilation openings 32. The cover is removably secured to the first mid-section perimeter of the bottom portion and includes a pair of moveable doors that extend downwards when a nose guide 34 is engaged to receive the sneeze of a user.

An improved device for use in decreasing the transmission of viral and pathogenic materials by capturing the bodily fluids after a wearer sneezes. The device includes a housing having a bottom portion, a cover, and a base. The bottom portion having receiving members 28 for housing a filter and ventilation openings 32. The cover is removably secured to the first mid-section perimeter of the bottom portion and includes a pair of moveable doors that extend downwards when a nose guide 34 is engaged to receive the sneeze of a user.

A respiratory protection mask includes detachably connected main body and front cover. The main body includes a shielding member for shielding a wearer's mouth and nose, and has air outlet with air-outlet valve and air inlets with air-inlet valves. The mask is characterized in a guide structure and a limiting structure provided between the main body and the front cover. The guide structure includes corresponding slide rail and slide channel capable of guiding the front cover to move along a linear path parallel to a longitudinal section of the air outlet to assemble to the main body and cover the air-outlet valve. The limiting structure includes corresponding male and female fasteners that are detachably engaged with each other when the front cover is assembled to the main body, preventing the front cover from moving in an opposite direction on the linear path to separate from the main body.

A respiratory protection mask includes detachably connected main body and front cover. The main body includes a shielding member for shielding a wearer's mouth and nose, and has air outlet with air-outlet valve and air inlets with air-inlet valves. The mask is characterized in a guide structure and a limiting structure provided between the main body and the front cover. The guide structure includes corresponding slide rail and slide channel capable of guiding the front cover to move along a linear path parallel to a longitudinal section of the air outlet to assemble to the main body and cover the air-outlet valve. The limiting structure includes corresponding male and female fasteners that are detachably engaged with each other when the front cover is assembled to the main body, preventing the front cover from moving in an opposite direction on the linear path to separate from the main body.

An article of manufacture for providing a combination personal protection device including a mask, a shield, and a veil is disclosed. The personal protection device includes a mask, a veil having a face opening and a pair of ear openings, a face shield having a mouth opening, a mouth flap configured to removably cover the mouth opening, a headband having an inner band coupled to the veil and an outer band coupled to the face shield. a crown support cap coupled to a top edge of the veil, and a crown air filter and a pair of ear air filters.