Biocide-loaded electrospun nanofibers supported by an adhesive-free tissue for filter removal of pathogens
An electrospinning and nanofiber technology, applied in the field of portable water supply systems, can solve the problems of reduced water flow rate and increased water pressure drop, and achieve the effects of low water pressure drop, high water flow rate and good sterilization effect
Active Publication Date: 2018-01-26
THE BF GOODRICH CO
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[0002] However, when potable water systems use biocide-containing nanofibrous fabrics bonded to filter media via an adhesive layer for disease control, it has been found that regardless of the incorporated No matter how thin the nanofiber fabric and adhesive layer, it usually results in a significant decrease in water flow rate and an increase in water pressure drop
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[0015] Electrospun nanofiber fabrics containing biocides can be incorporated into pathogen-retaining water filtration media such as NanoCeram-PAC TM medium to kill pathogens it contacts (see US 2011 / 0297609). However, bonding nanofiber fabrics to filter media without the use of adhesive pastes or layers is a challenge. When used, the adhesive paste or layer can block nanofiber pores and biocidal sites, or introduce chemical contaminants from the adhesive into the water system.
[0016] The present invention relates to the use of biocide loaded electrospun nonwoven polymeric nanofiber fabrics for providing filter media with enhanced pathogen killing efficacy for potable water systems, said fabrics being thermally bonded directly to the pathogen retaining filter media or via Thermal binders to bind to filter media that retain pathogens. Alternatively, the present invention provides filter media comprising a plurality of nanofiber fabrics joined together to provide pathogen kil...
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The present invention provides a novel type of filter media which, in use, provides an effective bactericidal effect while achieving a lower water pressure drop and a higher water flow rate. Specifically, the filter media of the present invention comprise microbiocidal membranes comprising electrospun nanofibrous fabrics loaded with biocidal nanoparticles. The filter media of the present invention has no adhesive layer and contains at least one thermally bonded layer made of a spunbonded nonwoven polymer fabric. The invention also provides a water purification filter cartridge and a portable water supply system thereof.
Description
Background of the invention [0001] In aircraft, potable water systems are generally used to supply cabin water outlet facilities (eg washbasins in toilets and sinks in onboard galleys) with fresh water. Such drinking water systems can use water filtration media (eg, pathogen-retaining filtration media) in combination with nanofibrous fabrics containing biocides to kill pathogens contained in water or air (see US Patent Application US 2011 / 0297609 A1) . [0002] However, when potable water systems use biocide-containing nanofiber fabrics bonded to filter media via an adhesive layer for disease control, it has been found that no matter how thin the nanofiber fabric and adhesive layer are incorporated, generally results in water Significant reduction in flow rate and increase in water pressure drop. Therefore, there is a need to develop new filtration systems that can be used in drinking water systems in the aviation field. There is a need for such filtration systems to provid...
Claims
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IPC IPC(8): B01D39/16B01D29/13B01D46/00B32B27/06B32B27/32B32B27/34B32B27/36C02F1/50C02F1/00C02F9/04A61L9/00
CPCB01D39/1623B01D67/002B01D2323/39B01D2325/48C02F1/001B01D2239/025B01D2239/0442B01D2239/0627B01D2239/0631B01D2239/0668C02F1/50C02F1/505B01D71/48B01D67/00043B01D69/1213B01D69/148
Inventor J.胡
Owner THE BF GOODRICH CO