The invention provides a system for sanitizing fluids such as water and air. In particular, the invention provides a combination of solid chlorhexidine and a polymer matrix, for which effluents are essentially free of leached chlorhexidine. The systems enable rapid disinfecting of fluids, including in line at the point of use, and can be employed for both high volume applications and disposable single-use applications.

The present invention is intended to provide a spunbond nonwoven fabric having low pressure loss, high collecting performance, and excellent processability and an air filter fabricated using the spunbond nonwoven fabric, the spunbond nonwoven fabric including fibers formed of a polyolefin-based resin, in which an average single fiber diameter of the fibers is 6.5 μm or more and 22.0 μm or less, a hindered amine-based compound represented by Formula (1) is contained at 0.1% by mass or more and 5% by mass or less, a melt flow rate (MFR) of the nonwoven fabric is 32 g/10 minutes or more and 850 g/10 minutes or less, and the nonwoven fabric is processed into an electret.

An in situ system of filter rejuvenation has a fluid inlet on a first side of a reaction chamber, a fluid outlet disposed on a second side of the reaction chamber, a filtration chamber with a first wall comprising a ceramic glass material with a pass-band in the infrared spectrum. The filtration chamber is in fluid communication with the fluid inlet and the fluid outlet so that a fluid introduced into the inlet passes through the filtration chamber and exits through the fluid outlet. The system has at least one infrared heating element configured to transmit infrared energy within the pass-band of the ceramic glass material to heat the filter medium disposed within the filtration chamber to a temperature of at least 260° C., which can gasify contaminants without combustion.

A method of filtering water contained in a squeezable bottle includes filling the squeezable water bottle with water; screwing a portable filtration apparatus onto the squeezable water bottle, the portable filtration apparatus includes a cap piece, the cap piece having a mouthpiece and a threaded portion, wherein the threaded portion is configured to screw onto the squeezable bottle; and a filter fluidly connected to the cap piece, wherein the filter comprises a plurality of hydrophilic hollow fibers and hydrophobic hollow fibers, the hydrophobic fibers are configured to allow air to flow into the squeezable bottle; flowing a filtrate out through the mouthpiece from the filter in response to a pressure differential between an inside portion of the squeezable bottle and an outside portion of the squeezable bottle.

A high strength environmental control device comprising a mesh container having at least one interior and one exterior surface is provided. The interior of the mesh container can comprise a filler material. The mesh container can comprise a plurality of yarns, including viscose fibers, interlaced together.

A high strength environmental control device comprising a mesh container having at least one interior and one exterior surface is provided. The interior of the mesh container can comprise a filler material. The mesh container can comprise a plurality of yarns, including viscose fibers, interlaced together.

A system for thermally bonding nonwoven fibers of assemblages of nonwoven fibers loosely held together may include a processing duct including an inlet end, an outlet end, and an intermediate portion extending between the inlet end and the outlet end. The system also may include one or more heat inlets located in the intermediate portion and configured to facilitate introduction of heat and air flow into the intermediate portion. The system further may include an inlet air feed at the inlet end and configured to separate the assemblages upon entry into the inlet end and propel the assemblages into the intermediate portion. The system also may include one or more heating devices configured to heat the assemblages as the assemblages are conveyed toward the outlet end to form processed assemblages, each of the processed assemblages including at least some nonwoven fibers adhered to one another.

A system for thermally bonding nonwoven fibers of assemblages of nonwoven fibers loosely held together may include a processing duct including an inlet end, an outlet end, and an intermediate portion extending between the inlet end and the outlet end. The system also may include one or more heat inlets located in the intermediate portion and configured to facilitate introduction of heat and air flow into the intermediate portion. The system further may include an inlet air feed at the inlet end and configured to separate the assemblages upon entry into the inlet end and propel the assemblages into the intermediate portion. The system also may include one or more heating devices configured to heat the assemblages as the assemblages are conveyed toward the outlet end to form processed assemblages, each of the processed assemblages including at least some nonwoven fibers adhered to one another.

A flame-retardant antibacterial composite polypropylene filter material and a preparation method thereof are disclosed. The filter material includes the following components in weight percent: 70-90 wt % of isotactic polypropylene, 3-10 wt % of a functional negative ion-releasing material, 3-10 wt % of a nano-antibacterial agent, 2-5 wt % of graphene oxide, 0.5-5 wt % of a flame retardant and 1-3 wt % of a dispersant. The filter material of the present invention can be prepared into network, fabric and other forms by the melt-blending extrusion, which can be applied for air pollutant removal in different environments. The functional negative ion-releasing material is a piezoelectric material, which can spontaneously produce negative oxygen ions, without consumption of energy or producing secondary pollution such as ozone. The released negative oxygen ions interact with positively charged particles in the air for settling, so as to quickly remove the particles.

A flame-retardant antibacterial composite polypropylene filter material and a preparation method thereof are disclosed. The filter material includes the following components in weight percent: 70-90 wt % of isotactic polypropylene, 3-10 wt % of a functional negative ion-releasing material, 3-10 wt % of a nano-antibacterial agent, 2-5 wt % of graphene oxide, 0.5-5 wt % of a flame retardant and 1-3 wt % of a dispersant. The filter material of the present invention can be prepared into network, fabric and other forms by the melt-blending extrusion, which can be applied for air pollutant removal in different environments. The functional negative ion-releasing material is a piezoelectric material, which can spontaneously produce negative oxygen ions, without consumption of energy or producing secondary pollution such as ozone. The released negative oxygen ions interact with positively charged particles in the air for settling, so as to quickly remove the particles.