CA2555847A1 - Face mask for the protection against biological agents - Google Patents
Face mask for the protection against biological agents Download PDFInfo
- Publication number
- CA2555847A1 CA2555847A1 CA002555847A CA2555847A CA2555847A1 CA 2555847 A1 CA2555847 A1 CA 2555847A1 CA 002555847 A CA002555847 A CA 002555847A CA 2555847 A CA2555847 A CA 2555847A CA 2555847 A1 CA2555847 A1 CA 2555847A1
- Authority
- CA
- Canada
- Prior art keywords
- mask
- valve
- layer
- flap
- biological agents
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003124 biologic agent Substances 0.000 title claims abstract 10
- 238000007789 sealing Methods 0.000 claims abstract 9
- 238000001914 filtration Methods 0.000 claims abstract 6
- 239000000463 material Substances 0.000 claims 9
- 239000004033 plastic Substances 0.000 claims 7
- 229920003023 plastic Polymers 0.000 claims 7
- -1 polypropylene Polymers 0.000 claims 5
- 239000004743 Polypropylene Substances 0.000 claims 4
- 239000000835 fiber Substances 0.000 claims 4
- 229920001155 polypropylene Polymers 0.000 claims 4
- 230000001681 protective effect Effects 0.000 claims 4
- 239000004745 nonwoven fabric Substances 0.000 claims 3
- 229920001296 polysiloxane Polymers 0.000 claims 3
- 239000011347 resin Substances 0.000 claims 3
- 229920005989 resin Polymers 0.000 claims 3
- 230000029058 respiratory gaseous exchange Effects 0.000 claims 3
- 241000711549 Hepacivirus C Species 0.000 claims 2
- 241000725303 Human immunodeficiency virus Species 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 2
- 229920006173 natural rubber latex Polymers 0.000 claims 2
- 229920000728 polyester Polymers 0.000 claims 2
- 241000193738 Bacillus anthracis Species 0.000 claims 1
- 241000700721 Hepatitis B virus Species 0.000 claims 1
- 241000589516 Pseudomonas Species 0.000 claims 1
- 241000607720 Serratia Species 0.000 claims 1
- 241000191967 Staphylococcus aureus Species 0.000 claims 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims 1
- 238000005299 abrasion Methods 0.000 claims 1
- 229940065181 bacillus anthracis Drugs 0.000 claims 1
- 229920002678 cellulose Polymers 0.000 claims 1
- 239000001913 cellulose Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000000356 contaminant Substances 0.000 claims 1
- 125000001153 fluoro group Chemical group F* 0.000 claims 1
- 239000003365 glass fiber Substances 0.000 claims 1
- 230000002209 hydrophobic effect Effects 0.000 claims 1
- 239000011159 matrix material Substances 0.000 claims 1
- 239000000178 monomer Substances 0.000 claims 1
- 150000002825 nitriles Chemical class 0.000 claims 1
- 229920001778 nylon Polymers 0.000 claims 1
- 229920000098 polyolefin Polymers 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 229920003051 synthetic elastomer Polymers 0.000 claims 1
- 229920001059 synthetic polymer Polymers 0.000 claims 1
- 239000005061 synthetic rubber Substances 0.000 claims 1
- 238000003856 thermoforming Methods 0.000 claims 1
Classifications
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
- A41D13/1138—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a cup configuration
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
- A62B18/10—Valves
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
- A62B23/02—Filters for breathing-protection purposes for respirators
- A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
- A62B18/084—Means for fastening gas-masks to heads or helmets
Abstract
The invention relates to a new mask for the protection against biological agents having additional features to improve the efficiency. The mask is in particular equipped with a filtering layer providing outstanding performances against biological agents, with a high efficiency exhalation valve and with a boundary sealing layer to enhance the seal between mask and face.
Claims (25)
1. A mask for the protection against biological agents consisting in a plurality of layers, characterized in that at least one of them, having filtering functions, is composed of borosilicate micro-glass fibers bound together by a vinyl acetate resin, the fiber matrix being supported by a strong, cellulose based, substrate and the structure being treated with a silicone based coating to impart hydrophobic properties.
2. A mask as claimed in claim 1 composed of three layers of material:
- a central layer having filtering function and the features described in claim 1 - an inner layer having shape-retaining function - an outer layer having covering function
- a central layer having filtering function and the features described in claim 1 - an inner layer having shape-retaining function - an outer layer having covering function
3. A mask as claimed in claim 2 characterized in that the filter layer has thickness ranging between 150 and 400 microns and unit area ranging between 25 and 65 g/m2.
4. A mask as claimed in claim 2 characterized in that the inner layer, with the function of providing support for the filtration layer and structure to the mask body, is made from non-woven fabric obtained by polypropylene or polyester fibers
5. A mask as claimed in claim 2 characterized in that the inner layer is made from non-woven fabric consisting in polypropylene fibers
6. A mask as claimed in claim 2 characterized in that the outer layer, with the function of protecting the filtration layer from abrasion, is made from non-woven fabric obtained by polyolefins, polyester or nylon fibers
7. A mask as claimed in claim 2 characterized in that the outer layer is made from meltblown polypropylene fibers
8. A mask as claimed in claim 1, equipped with a valve to facilitate the breathing which opens, in response to increased pressure, when the wearer exhales, allowing air to be rapidly evacuated from the mask interior, and which closes during inhaling
9. A mask as claimed in claim 8, characterized in that the valve comprises a valve seat over which is secured a raised valve cover, carrying apertures.
The seat is composed by a flat surface, having orifices which allow the air flow.
In the centre of the seat, a low thickness relief rises.
The cover is equipped with apertures allowing the air passing through.
Inside the cover, in the centre, a valve flap (h) is attached by an appropriate support; the flap is made from flexible material and represents the mobile component which opens and closes the valve. The valve can be made from the various materials suitable for thermoforming, preferably is made from moulded polypropylene; the flap is made from an elastic flexible material such as, for example, synthetic rubber.
The valve is attached to the centre of the mask where an aperture is also created.
When the wearer inhales, the valve flap seals against the relief, preventing air from flowing, while, when the wearer exhales, the valve flap lift away from the relief, letting air pass through.
Consequently, inhaled air enters the mask exclusively through the filter media of the mask whereas exhaled air passes through the aperture of the mask and the orifices in the valve.
The seat is composed by a flat surface, having orifices which allow the air flow.
In the centre of the seat, a low thickness relief rises.
The cover is equipped with apertures allowing the air passing through.
Inside the cover, in the centre, a valve flap (h) is attached by an appropriate support; the flap is made from flexible material and represents the mobile component which opens and closes the valve. The valve can be made from the various materials suitable for thermoforming, preferably is made from moulded polypropylene; the flap is made from an elastic flexible material such as, for example, synthetic rubber.
The valve is attached to the centre of the mask where an aperture is also created.
When the wearer inhales, the valve flap seals against the relief, preventing air from flowing, while, when the wearer exhales, the valve flap lift away from the relief, letting air pass through.
Consequently, inhaled air enters the mask exclusively through the filter media of the mask whereas exhaled air passes through the aperture of the mask and the orifices in the valve.
10. A mask as claimed in claim 9 characterized in that the relief of the valve seat owns a concave surface wherein a continuos, cylinder shaped, plastic lays all along the surface of the relief.
The plastic can be made from synthetic polymers obtained from different monomers and can be produced with different mixtures, for example, with fluoro, silicone or nitrile based mixtures.
The plastic is designed, in terms of dimensions and structure, to provide the highest seal during closing. In fact, when the valve flap seals against the relief, it goes into direct contact with the plastic; then, due to the dimensions of the flap support and the plastic thickness, the valve flap flexes up on the edges.
The flap material, thanks to its intrisec memory and to elastic properties, perfectly seals onto the plastic surface; in addition, the compatibility of the two materials, having the same chemical-physical superficial properties, ensures a perfect adherence.
The plastic can be made from synthetic polymers obtained from different monomers and can be produced with different mixtures, for example, with fluoro, silicone or nitrile based mixtures.
The plastic is designed, in terms of dimensions and structure, to provide the highest seal during closing. In fact, when the valve flap seals against the relief, it goes into direct contact with the plastic; then, due to the dimensions of the flap support and the plastic thickness, the valve flap flexes up on the edges.
The flap material, thanks to its intrisec memory and to elastic properties, perfectly seals onto the plastic surface; in addition, the compatibility of the two materials, having the same chemical-physical superficial properties, ensures a perfect adherence.
11. A mask as claimed in claim 10 characterized in that the relief of the valve seat is circular, the valve flap is round shaped and the continuos, cylinder shaped, plastic is an O-ring which lays all over the circumference of the relief.
12. A mask as claimed in claim 11 characterized in that the valve's components have shapes and dimensions as shown in fig. 13.
13 a: valve seat, front view x: 45 mm y: 30 mm z: 26 mm 13b: valve seat, side view x: 1mm y: 4.2 mm z: 4 mm 13 c: valve cover, front view x: 32 mm y: 30 mm z: 18 mm 13d. valve cover, side view x: 8 mm y: 3 mm z: 1 mm w: 3.5 mm 13e: valve flap x (diameter): 30 mm 13. A mask as claimed in claim 1 characterized in that the mask is equipped, on the edges, with a boundary sealing layer to improve the seal; the boundary layer is applied all along the perimeter of the mask, starting from the side joins; the seal layer tightly fits over the wearer's face perfectly adapting to any face shape; that ensures a leak free contact to the wearer's face, without pin holes and distorsions which would allow contaminants to pass through the mask body without being removed by the filtering material.
14. A mask as claimed in claim 13 characterized in that the material of the boundary sealing layer is made from a natural rubber latex resin or a silicone based resin
15. A mask as claimed in claim 13, characterized in that the boundary sealing layer is made from natural rubber latex applied in some 2 mm thickness and in unit area ranging between 200 and 400 g/m2
16. A mask as claimed in claim 1, characterized in that, adjoining the boundary sealing layer as claimed in claim 13, a strip, made from the same material than the boundary sealing layer, is applied in the nose clip area; the strip makes the mask more comfortable to wear and, further on, improves the seal between the mask and the face at the nose portion wherein deformations and plies may normally be present
17. Use of the mask as claimed in claim 1 as protective mean against biological agents
18 Use of the mask as claimed in claim 1, equipped with a valve as claimed in claim 10, as protective mean against biological agents.
19. Use of the mask as claimed in claim 1, equipped with a valve as claimed in claim 10 and with a boundary sealing layer as claimed in claim 13, as protective mean against biological agents
20. Use of the masks as claimed in claim 17, 18 and 19 as protective mean against Hepatitis C Virus (HCV), Hepatitis B Virus (HBV), Human Immunodeficiency Viruses (HIV), Sp. Pseudomonas, Staphylococcus aureus, Serratia Marcescescens, Bacillus Anthracis
21. A valve to facilitate the breathing as claimed in claim 10
22. A valve to facilitate the breathing as claimed in claim 11
23. A boundary sealing layer as claimed in claim 13 to improve the hermetic seal against biological agents
24. A boundary staling layer as claimed in claim 14 to improve the hermetic seal against biological agents
25. A boundary sealing layer as claimed in claim 15 to improve the hermetic seal against biological agents
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000007A ITPS20040007A1 (en) | 2004-02-18 | 2004-02-18 | PROTECTION MASK AGAINST BIOLOGICAL AGENTS |
| ITPS2004A000007 | 2004-02-18 | ||
| PCT/IT2005/000060 WO2005077214A1 (en) | 2004-02-18 | 2005-02-10 | Face mask for the protection against biological agents |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2555847A1 true CA2555847A1 (en) | 2005-08-25 |
| CA2555847C CA2555847C (en) | 2010-09-14 |
Family
ID=34856958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2555847A Active CA2555847C (en) | 2004-02-18 | 2005-02-10 | Face mask for the protection against biological agents |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US7686018B2 (en) |
| EP (1) | EP1715768B1 (en) |
| JP (1) | JP4705049B2 (en) |
| CN (1) | CN100592878C (en) |
| AT (1) | ATE481890T1 (en) |
| BR (1) | BRPI0507869B8 (en) |
| CA (1) | CA2555847C (en) |
| DE (1) | DE602005023709D1 (en) |
| ES (1) | ES2352447T3 (en) |
| IT (1) | ITPS20040007A1 (en) |
| MX (1) | MXPA06009498A (en) |
| RU (1) | RU2006133324A (en) |
| UA (1) | UA94381C2 (en) |
| WO (1) | WO2005077214A1 (en) |
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| ITPS20060008A1 (en) * | 2006-04-12 | 2007-10-13 | C L Com Srl | METHOD FOR THE EVALUATION OF PROTECTION FROM BIOLOGICAL AGENTS OF INDIVIDUAL DEVELOPMENT DEVICES FOR RESPIRATORY WAYS |
| US9770611B2 (en) | 2007-05-03 | 2017-09-26 | 3M Innovative Properties Company | Maintenance-free anti-fog respirator |
| US20080271739A1 (en) | 2007-05-03 | 2008-11-06 | 3M Innovative Properties Company | Maintenance-free respirator that has concave portions on opposing sides of mask top section |
| US8240302B1 (en) * | 2007-06-20 | 2012-08-14 | Amad Tayebi | Breathing mask with debris deflector |
| US8113201B2 (en) * | 2008-06-30 | 2012-02-14 | Kimberly-Clark Worldwide, Inc. | Collapse resistant respirator |
| RU2481050C2 (en) * | 2008-07-22 | 2013-05-10 | Спидо Интернешнл Лимитед | Clothing article |
| US11083916B2 (en) * | 2008-12-18 | 2021-08-10 | 3M Innovative Properties Company | Flat fold respirator having flanges disposed on the mask body |
| KR20110137291A (en) * | 2009-01-11 | 2011-12-22 | 휴미드 미드 테크놀로지 (피티와이) 리미티드 | Humidification face mask |
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| EP2501440A2 (en) * | 2009-11-18 | 2012-09-26 | 3M Innovative Properties Company | Reinforced filter media |
| MX2012010078A (en) | 2010-03-03 | 2012-09-12 | 3M Innovative Properties Co | Dispensable face mask and method of making the same. |
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| BR112014005473A2 (en) * | 2011-09-09 | 2017-04-04 | 3M Innovative Properties Co | face mask, dispenser, stack of folded face masks, method of making a face mask and extendable flat face mask |
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| US6332465B1 (en) * | 1999-06-02 | 2001-12-25 | 3M Innovative Properties Company | Face masks having an elastic and polyolefin thermoplastic band attached thereto by heat and pressure |
| JP2003174873A (en) * | 2001-12-12 | 2003-06-24 | Wakunaga Pharmaceut Co Ltd | Method for removing inhibitory substance against enzymatic gene amplification reaction |
| CN1267033C (en) * | 2003-05-22 | 2006-08-02 | 刘靖北 | Medical three-proofing fully-sealed protective hood |
| CN2599943Y (en) * | 2003-06-16 | 2004-01-21 | 王壮 | Protective mask for preventing SARS virus spread |
| US7188622B2 (en) * | 2003-06-19 | 2007-03-13 | 3M Innovative Properties Company | Filtering face mask that has a resilient seal surface in its exhalation valve |
| US7371464B2 (en) * | 2005-12-23 | 2008-05-13 | 3M Innovative Properties Company | Adhesive compositions |
-
2004
- 2004-02-18 IT IT000007A patent/ITPS20040007A1/en unknown
-
2005
- 2005-02-10 DE DE602005023709T patent/DE602005023709D1/en active Active
- 2005-02-10 BR BRPI0507869A patent/BRPI0507869B8/en active IP Right Grant
- 2005-02-10 CN CN200580005214A patent/CN100592878C/en not_active Expired - Fee Related
- 2005-02-10 JP JP2006553770A patent/JP4705049B2/en not_active Expired - Fee Related
- 2005-02-10 RU RU2006133324/12A patent/RU2006133324A/en not_active Application Discontinuation
- 2005-02-10 WO PCT/IT2005/000060 patent/WO2005077214A1/en active Application Filing
- 2005-02-10 ES ES05709210T patent/ES2352447T3/en active Active
- 2005-02-10 EP EP05709210A patent/EP1715768B1/en active Active
- 2005-02-10 UA UAA200609864A patent/UA94381C2/en unknown
- 2005-02-10 US US10/589,874 patent/US7686018B2/en active Active
- 2005-02-10 AT AT05709210T patent/ATE481890T1/en not_active IP Right Cessation
- 2005-02-10 MX MXPA06009498A patent/MXPA06009498A/en active IP Right Grant
- 2005-02-10 CA CA2555847A patent/CA2555847C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2555847C (en) | 2010-09-14 |
| ATE481890T1 (en) | 2010-10-15 |
| US7686018B2 (en) | 2010-03-30 |
| CN1929755A (en) | 2007-03-14 |
| ES2352447T3 (en) | 2011-02-18 |
| DE602005023709D1 (en) | 2010-11-04 |
| JP2007522867A (en) | 2007-08-16 |
| BRPI0507869A (en) | 2007-07-24 |
| ITPS20040007A1 (en) | 2004-05-18 |
| WO2005077214A1 (en) | 2005-08-25 |
| RU2006133324A (en) | 2008-03-27 |
| US20070157932A1 (en) | 2007-07-12 |
| BRPI0507869B1 (en) | 2018-02-14 |
| JP4705049B2 (en) | 2011-06-22 |
| BRPI0507869B8 (en) | 2021-07-27 |
| UA94381C2 (en) | 2011-05-10 |
| CN100592878C (en) | 2010-03-03 |
| MXPA06009498A (en) | 2007-10-08 |
| EP1715768A1 (en) | 2006-11-02 |
| EP1715768B1 (en) | 2010-09-22 |
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| EEER | Examination request |