Do Masks With Antiviral Coating Offer Extra Safety?
Respective samples of a non-woven polypropylene of a conventional sort as used for surgical masks were coated with every of those options, the sample was allowed to empty off extra liquid, and then allowed to air dry. This procedure using the above options resulted in a ca. 10% w/w deposition of the acidic polymer onto the substrate material. A filter materials suitable for use within the face mask according to any certainly one of claims 1 to 26 comprising a fibrous substrate on which is deposited an acidic polymer together with an organic carboxylic acid.
The filter material of the invention in sheet kind can be adapted easily to the convex form acceptable for fitting to a user’s face. The face masks may additionally comprise one or more layer of a further materials, e.g. one layer backing the filter material, or two layers sandwiching the filter material, optionally with one or more further layer. Such a further layer of material may be situated within the face mask such that when the masks is used the layer of further material is positioned between the filter material and the user’s pores and skin to thereby cut back any irritation to the user’s pores and skin. In one other method filter supplies of the present invention may be made by identified electrospinning processes, by which an electrified liquid jet of a polymer, in the type of a solution or soften is fashioned, and is deposited on a grounded collector fibre. For example the filter material might incorporate a number of antimicrobial compound. Suitable examples of such compounds include quaternary ammonium compounds (e.g. benzalkonium chloride, cetrimide), phenolic compounds (e.g. triclosan, benzoic acid) biguanides (e.g. chlorhexidine, alexidine) and mixtures thereof.
Influenza virus an infection inhibitor and influenza virus an infection prevention product US B Sekisui Chemical Co., Ltd. A mask in accordance with declare 2 wherein the air-permeable substrate contains a non- woven polyester. It is due to this fact seen that each one the polypropylene swatches upon which the listed acidic polymer had been deposited brought on 3 or greater than 3 Log discount in the viral titer.
- The wetted substrate might then be dried, e.g. e.g. by evaporation in the ambient air or in a drying tunnel.
- Influenza virus an infection inhibitor and influenza virus infection prevention product US B Sekisui Chemical Co., Ltd.
- A mask according to any one of the preceding claims wherein the filter materials incorporates one or more surfactant.
7 A masks based on declare 6 wherein the acidic polymer comprises a polymer of acrylic acid or methacrylic acid. A mask based on any one of many previous claims whereby the acidic polymer contains a poly- polymer. The filter supplies of this invention could also be utilized in other types of respiratory air filter corresponding to nostril plugs. Such a filter may be of generally standard kind, incorporating the filter materials of the invention. A face masks of this invention may comprise one, two, three or extra layers of such a sheet or pad form filter material.
Assist Forestall The Spread Of Viruses
For example an alkali such as sodium hydroxide, or a buffer corresponding to a citrate e.g. sodium citrate, may be included into the loading resolution to achieve such a pH. The filter material described herein may be made in various methods, by which the air- permeable substrate is combined with the acidic polymer. Other appropriate acidic polymers are believed to incorporate polyvinyl phosphonic acids. Acidic polymers which have been discovered helpful for the purposes herein have been found to have molecular weights within the vary 30,000 to 2,000,000 however molecular weight doesn’t appear to be important, and this can be merely an exemplary vary.
Results confirmed that all three loaded swatches killed the virus as follows, by which the Log Reduction Titer / ml is listed. A Log Reduction of 3 corresponds to a 99.9% kill of virus. The loading options listed above were prepared in a hundred and sixty kg batches for utility to a polypropylene or polyester non-woven cloth by spraying or dipping using standard commercially available machinery, followed by drying the wetted fabric in a drying tunnel. A reduction within the viral titre of avian Influenza A NIBRG-14 H5N1 virus was noticed after remedy with the check articles 2 (loading resolution 1% ETD 2020 + 0.5% Citric acid), three (loading resolution 2% ETD 2020), and 4 (loading resolution 2% ETD 2020 + 1% Citric acid). No viral discount was noticed following remedy with check article 1 (loading answer 1% ETD 2020). 2) 200μl of diluted avian NIBRG-14 Influenza H5N1 virus at 1/10 (v/v) dilution in distilled water was added to each check or management article in a 6-nicely plate and incubated at Room temperature on a shaker (at 300MoT/minute) for 60 minutes.