A purification device for disinfecting and filtering intake air is disclosed. The purification device comprises a housing provided with a number of inlet perforations for allowing the intake air to enter the housing and a number of air outlet perforations for allowing air purified by the purification device to leave the housing. The purification device moreover comprises a fan arranged inside the housing to suck the intake air into the housing and blow the purified air out of the housing. The purification device further comprises an ultraviolet radiation lamp arranged inside the housing to irradiate the intake air. The purification device also comprises a high-efficiency particulate air (HEPA) filter arranged to filter the intake air before the intake air leaves the housing as purified air. The filter comprises a plurality of pleats arranged in such a manner that the angle between adjacent pleats is 30 degrees or less.

A facemask having a graphene layer providing antibacterial and antiviral properties. The facemask is also able to generate electricity from the wearer's breath. The graphene is a three dimensional graphene produced in situ the facemask by burning a suitable material in the facemask with a laser, i.e. laser induced graphene (LIG). Typically, the graphene comprises hydrophilic graphene, in such a way that the graphene is more hydrophilic towards one side of the substrate and less hydrophilic towards the other side of the substrate, which provides the possibility of generating an electrical potential difference using human breath.

An antibacterial deodorizing mask including titanium dioxide according to the present disclosure includes: a mask body configured to surround at least one of a wearer's mouth and nose; and a pair of ear loops provided at both sides of the mask body so as to be hung on the wearer's ears and each having both ends coupled to upper and lower portions of the mask body, respectively, in which the mask body includes titanium dioxide particles having an average particle diameter D50 of 0.2 mm to 2 mm.

A method includes: using a planar substrate having at least one acid-functionalized layer including at least one first acid having a pks1 value of 0 to 7 and at least one different second acid or derivative thereof selected from a group consisting of C.sub.8 to C.sub.18 fatty acids, esters, amides, and mixtures thereof, as a filter medium for depleting viruses from air and other gases.

The invention aims to provide a crosslinked polymer having excellent moisture retention properties, an excellent ethanol absorption capacity, excellent adhesiveness to the skin when applied to the skin as a cosmetic, and a high concentration of an effective component. The invention relates to a N-vinyl lactam-based crosslinked polymer including: a structural unit derived from a N-vinyl lactam; and a structural unit derived from a crosslinking agent, the N-vinyl lactam-based crosslinked polymer having an ethanol absorption capacity of 3 to 40 g per 1 g of the N-vinyl lactam-based crosslinked polymer, the N-vinyl lactam-based crosslinked polymer containing a particle having an aspect ratio determined by the following method of 1.15 to 10 in a proportion of 10% to 100% (by number) of the total number of the N-vinyl lactam-based crosslinked polymer and having a proportion of an extractable of 35 mass % or less in 100 mass % of the entire polymer, the method being “method of measuring aspect ratio” in which the aspect ratio is determined as a value obtained by measuring the major and minor axes of a primary particle of the N-vinyl lactam-based cross-linked polymer with an optical or electron microscope and dividing the major axis by the minor axis.

A purification device of exercise environment is provided and includes a main body, a purification unit, a gas guider and a gas detection module. The main body has at least one gas inlet and at least one gas outlet. The purification unit, the gas guider and the gas detection module are disposed in the main body. The purification unit filters a gas in an exercise environment introduced through the at least one gas inlet. The gas guider operates continuously to transport the gas in the exercise environment to be introduced through the at least one gas inlet and to flow through the purification unit. The gas detection module detects a gas information and a particulate cleanliness of the air in the exercise environment, and the particulate cleanliness of the gas in the breathing region around the nose of the exerciser reaches 0˜20 μg/m.sup.3 accordingly.

The present invention provides an air filter comprising a polymer foam and an adsorbent material wherein said polymer foam comprises metal particles.

The present disclosure relates to a double swirl type air purifier including: a main body configured to accommodate a liquid for purifying an inflow air; a suction part located at one side of the main body and configured to suction the inflow air; and a discharge part located at a predetermined position of the main body and configured to discharge an outflow air introduced from the main body. The main body includes a rotation part located at a lower portion of the main body and configured to rotate the liquid. A contact area between the liquid swirled by the rotation part and the inflow air swirled by inflow pressure of the suction part is increased so as to improve air purification efficiency.

The invention aims to provide a crosslinked polymer having an excellent liquid absorption capacity and sufficient gel-pulverizability. The invention relates to a N-vinyl lactam-based crosslinked polymer including: a structural unit derived from a N-vinyl lactam-based monomer; and a structural unit derived from triallyl cyanurate, the N-vinyl lactam-based crosslinked polymer containing the structural unit derived from triallyl cyanurate in a ratio of 0.12 to 0.48 mol % to 100 mol % of all structural units.

The formation of sterilization tubes by plates with parts that match in whole or in part, that when assembled together form ducts, passages, channels, or tubes in a mass or block of heat resistant material. The size of the block may be reduced by forming the ducts as curved passages or tubes that will keep or increase the length of the tube while keeping the same or more exposure time while the gas is passing through. If the length of the curved duct is the same as a straight tube would have been, the overall size of the assembly may be reduced from what it otherwise would have been. If the curved length is made longer while the size of the assembly is kept the same, the exposure time is increased for a more effective sterilization.