WO2010023370A1 - Composition multicouche pour masque respiratoire - Google Patents
Composition multicouche pour masque respiratoire Download PDFInfo
- Publication number
- WO2010023370A1 WO2010023370A1 PCT/FR2009/000985 FR2009000985W WO2010023370A1 WO 2010023370 A1 WO2010023370 A1 WO 2010023370A1 FR 2009000985 W FR2009000985 W FR 2009000985W WO 2010023370 A1 WO2010023370 A1 WO 2010023370A1
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- WO
- WIPO (PCT)
- Prior art keywords
- intermediate layer
- composition according
- mask
- fibers
- layer
- Prior art date
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Classifications
-
- 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
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- 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
Definitions
- the invention relates to a multi-layer filtering composition for single-use respiratory protection masks, against any particles in suspension in the air having dimensions that can reach the sub-micron domain, increasing the performance of the inspiration-expiration pair and making it at least equivalent. to that of disposable masks with breathing valves.
- the invention relates to the use of this multilayer filtering composition in the production of respiratory protection masks, in particular for intense physical activity, allowing the abandonment of the single-use respiratory mask provided with a breathing valve.
- a respiratory protection mask generally comprises a part intended for the contact of the face covering the nose and the mouth, made in one or more layers of filter material made integral by their welded or glued edges, placed on the face in a sealed manner and kept in contact with each other. of the face by means of fixation.
- Respiratory protection masks must comply with normative constraints in force, in particular with regard to inward leakage, the penetration of the filter medium by means of agents specific to preset airflows, and the respiratory resistance in the air. inspiration or expiration at pre-established airflows.
- Document US 2008/0110469 describes an ovoid-shaped protective breathing mask whose contour is provided with an adhesive tape.
- the mask is composed of two filter layers, an inner layer of a tribo-filled felt-type fabric and an outer layer of a meltblown nonwoven. An additional anti-odor layer may also be provided.
- this type of mask can irritate the skin and create feelings of discomfort.
- the adhesive strip can peel off and the mask can then lose its filtration efficiency.
- EP 1 014 815 describes a multi-layered breathing mask including a first outer layer of a trilaminated nonwoven obtained by spunbond / extrusion / spunbond (SMS), an intermediate layer into an electret and an inner layer made in a wet-formed surface web, or a spunbond layer or a trilaminated non-woven fabric identical to that of the outer tick (SMS).
- SMS spunbond / extrusion / spunbond
- Such a stack of successive layers is certainly beneficial for filtration, but opposes much resistance to breathing, which is tiring and uncomfortable for the user.
- gaps between the mask and the face may appear during the expiration, making the mask is detached from the face and no longer fulfills its filtration function.
- the filtration capacity and the flow rates of air delivered by a simple breathing mask in inspiration or in expiration is defined and limited by the composition of the filter layer or layers, the air flow rates to the minute and the filtration capacities of the composition being concerned in particular by the quality of the textile or paper fibers constituting their dimensioning, their origin, by the practical methods for the manufacture of the layer or layers used in the production of the mask, the binder used during the formation of the layer or layers, to create an inter-fiber cohesion and an appropriate air porosity.
- the simple breathing mask whatever the composition of the layer or layers, has been fitted with a breathing valve to artificially increase the flow of exhaled air to eliminate the user's feeling of being choked by a protective respirator, as soon as the user moves from quasi-rest state to a physical work state requiring greater airflow.
- a single or multi-layer respirator with a breathing valve that allows for at least a quicker expiration of the inspired and used air during its passage in the respiratory tract of the user is at the origin of disadvantages some of which are major, such as: the increase of the weight of the simple mask, which can be multiplied by a factor 5 or 6, and becomes significant discomfort for the user; - A little changed inspiration that requires the user in physical work, a much greater effort for a volume of air demand necessarily increased by the effort; a loss of a part of the total inspiration surface of the respiratory mask, of the order of 7% to 12% occupied by the implantation of the valve (valve); the requirement of a change of shape of the respiratory mask to provide a necessary reception surface for mounting a valve.
- the objects assigned to the invention are numerous and diverse because they derive from both the disadvantages noted in the respiratory masks described in the state of the art, as well as the particularly technical needs that manifest themselves in the use of masks respiratory protection in various fields in the broadest sense of the term, such as, for example, that of industry, construction and public works, or that of the medical sector requiring an improved respiratory capacity.
- a first object is to create a new-generation breathing mask whose weight does not exceed that of single or multilayer single-layer respiratory masks of the state of the art (from 5g to 8g) by eliminating the valve (valve) present on the masks of single or multilayer respiratory protection of the state of the art, and which has enhanced breathing performance for a user providing physical effort, said new-design respirator having at least the same respiratory capacity as that of a Respirator mask of the state of the art equipped with this valve (valve).
- Another object is to create a new generation respiratory protection mask, without valve (valve), but whose design gives it at least the same respiratory capacity as that of a breathing mask with a valve (valve) giving it during its use a polyfunctional character, allowing use of said mask as well when the user wearing it performs a low physical effort and when it performs intense physical effort.
- Another object is to increase the respiratory capacity of the respiratory protection mask which is measured by a volume of air per minute passing through the respiratory mask.
- Another object is to provide a simplified respiratory mask, lightened, but able to facilitate for the user of the mask both the inspiration and the expiration of the air through said mask so that inspiration it does not feel a sensation of effort and that the expiration mask does not peel off the face, thus ensuring effective filtration and protection of the user.
- Another object is to provide a respirator mask capable of filtering very fine particles, for example dust or microorganisms, while improving the performance of the inspiration / expiration pair, even during a significant physical effort.
- Another object of the invention is a respiratory protection mask capable of providing good protection against harmful solid or liquid particles, while being ergonomic and comfortable to wear.
- Another object of the invention is an effective respiratory protection mask, ensuring the respiratory comfort of the user, while being able to be manufactured economically in large series.
- Another object of the invention is a respirator mask whose manufacture can be easily automated and which, by the removal of the valve (valve), allows a significant reduction in cost.
- Another object of the invention is a respiratory protection mask which makes it possible to greatly reduce during its manufacture the use of fossil raw materials.
- the invention relates to a multilayer filtering composition for a protective respiratory mask, characterized in that this multilayer filtering composition comprises outside to inside: a) an outer layer made of a spunbonded nonwoven fabric; b) a first intermediate layer of felt-type tribocharged nonwoven fabric made from at least two different types of fibers capable of delivering opposite electrical charges to the fabric, reinforcing the filtration; c) at least a second intermediate layer made of a nonwoven web of microfibers meltblown, said web being electrostatically charged; and d) an inner layer in contact with the face made of a spunbond nonwoven fabric.
- the multilayer filtering composition according to the invention for a protective respiratory mask leads to a filtration capacity and a respiratory capacity at least equal to that of a single or multilayer protective respiratory mask equipped with a valve (valve), whereas said composition is free of such a valve (valve).
- the composition comprises a first and a second intermediate layer intended more particularly to perform an effective filtration placed between two end layers forming a support of the assembly, each layer having been the subject of selection of its composition among the layers intended for the realization of respiratory masks simultaneously having filtration capabilities (for filtering fine particles, sub-micron) and respiratory capabilities (to reduce the respiratory effort).
- the end layers comprise an outer layer and an inner layer, each made of a spunbond nonwoven fabric capable of imparting strength to the assembly and supporting the intermediate filter layers.
- the first intermediate layer selected is a tribocharged felt-type nonwoven fabric made from at least two different types of fibers capable of delivering opposite electrical charges to the fabric, reinforcing the filtration.
- This first intermediate layer is an electrostatically charged filter medium comprising at least two fibers having different electrical properties which are transformed, during their manufacturing process, so that a charge transfer is created between two different types of fibers and that discrete charges, positive and negative, are present on the surface of the fibers.
- One of the fibers of this filter media being a very good insulation, the charge transfer is stable and permanent.
- This first intermediate layer thus has very good filtration properties, it is able to retain particles having dimensions smaller than one micron, while being able to be made based on coarse fibers, which oppose a low resistance to the passage of air at through this filter media.
- the second intermediate layer selected is a nonwoven web of meltblown microfibers charged with static electricity.
- This layer is able to retain even finer particles, such as viruses or bacteria. It is an electret-type fabric, charged with static electricity so as to hold on its surface the particles suspended in the air. Such a layer is also a barrier to liquid particles suspended in the air.
- the arrangement of the layers in the composition of the invention follows a precise order, more particularly, arranging, from the outside towards the inside, after a first support layer, firstly the first intermediate layer a nonwoven fabric. tribocharged felt-type, then the second intermediate layer made of a nonwoven web of microfibers meltblown, charged with static electricity.
- This arrangement makes it possible to obtain a selective filtration of the particles in suspension, the particles having larger dimensions being retained by the first intermediate layer and the finer particles by the second.
- This makes it possible to obtain an effective filtration, without immediate clogging of the filtering layers, which makes it possible to have a functional mask for a duration of operation at least equivalent to that of the respiratory masks of the state of the art.
- the second intermediate layer being the first filter layer coming into contact with the air exhaled by its carrier, it effectively stops the liquid particles suspended in the air blown, preventing its emission into the surrounding air.
- the weight of a mask made with such a composition is less than or equal to 6 g, much less than the masks of the state of the art, especially those comprising a valve (valve) breathing.
- a mask has a soft touch and allows the reduction or elimination of perspiration and prevents fogging giving comfort to the wearer.
- the first intermediate layer has a resistance to the passage of an air flow at an average speed of 8.2 m / min which is less than 10 Pa.
- the first intermediate layer has a basis weight of about 50 g / m 2 to 100 g / m 2 .
- its thickness is about 1.3 mm to 2 mm (before implementation).
- the first intermediate layer is chosen so that the penetration to the particles of sodium chloride of
- 0.6 ⁇ m with an air flow having an average speed of 9.5 m / min is (it is understood that it reaches in laboratory condition) of 31% for a first intermediate layer having a basis weight of 50 g / m 2 and 10.2% for a first interlayer having a basis weight of 100 g / m 2 .
- the fibers that make up the first intermediate layer have a fiber diameter of about 20 ⁇ m to 25 ⁇ m.
- these fibers making up the fabric of the first intermediate layer are chosen from natural fibers, such as wool, cotton, linen, silk, animal hair; or among artificial fibers, such as viscose, cellulose acetate, cellulose triacetate, rayon; or among synthetic fibers, such as polyamide, polyvinyl alcohol, polyester, acrylic, polyolefin (polyethylene, polypropylene and copolymers thereof), polytetrafluoroethylene, polyvinyl chloride, polyurethane; these fibers can be taken alone or in mixture.
- natural fibers such as wool, cotton, linen, silk, animal hair
- artificial fibers such as viscose, cellulose acetate, cellulose triacetate, rayon
- synthetic fibers such as polyamide, polyvinyl alcohol, polyester, acrylic, polyolefin (polyethylene, polypropylene and copolymers thereof), polytetrafluoroethylene, polyvinyl chloride, polyurethane; these fibers can be taken alone or in mixture.
- the second intermediate layer is made based on two layers of superposed polypropylene fibers each having a basis weight of between 27 g / m 2 and 64 g / m 2 .
- the second intermediate layer is chosen so that the resistance against the passage of an air flow having a flow rate of 32 l / min is about 26 Pa for a second intermediate layer having a basis weight of 27 g / m 2 and it is about 50 Pa for a second intermediate layer having a basis weight of 64 g / m 2 .
- the thickness of the second intermediate layer (12) is between 0.2 mm and 0.8 mm.
- the thicknesses of the various layers are chosen to obtain a composition for a breathing mask that is in compliance with the standards in force specific to the different types of protection.
- Respiratory protection masks are classified according to the European standard EN149 in three protection classes: FFP1, FFP2 and FFP3 and, according to the American NIOSH nomenclature, in N95 and N99.
- the classification of the filters relates to their filtration capacity against particles of a certain size, limited to about 0.6 ⁇ m, it being 95% for the masks FFP2 and N95 and 99% for the masks FFP3 and N99.
- the penetration to particles of sodium chloride with a flow of air having a flow rate of 32 l / min is 3% for a second intermediate layer having a basis weight of 27 g / m 2 and 0.2% for a second intermediate layer having a basis weight of 64 g / m 2 .
- the second intermediate layer is made of polypropylene microfibers.
- the inner layer and the outer layer are made of a needled spunbonded nonwoven fabric, its grammage being between 10 g / m 2 and 30 g / m 2 , preferably 20 g / m 2 .
- the inspiratory breathing resistance measured with a flux of 95 l / min passing through its layers is less than 100 Pa.
- the inhalation resistance to inspiration measured during tests performed with a mask of type FFP3 (or N99) was about 93 Pa to 99 Pa
- tests performed with FFP2 (or N95) type masks established the values of the resistance to expiration of about 43 Pa at 50 Pa
- tests performed with FFP1 type masks established the values of the resistance to expiration of about 40 Pa at 47 Pa.
- the respiratory resistance at expiration measured with a flow of 160 l / min passing through its layers is less than 175 Pa.
- the respiratory resistance at expiration measured during tests performed with a mask of type FFP3 (or N99) was about 159 Pa at 172 Pa
- tests performed with FFP2 (or N95) type masks established the values of the resistance to expiration of about 76 Pa at 86 Pa
- tests performed with FFP1 type masks established the values of the resistance to expiration of about 71 Pa at 75 Pa.
- a protective respiratory mask comprising a composition according to the invention.
- Such a mask provides increased breathing comfort for high filtration capacity.
- the protective respiratory mask of the invention has a weight which is equal to or less than 6 g.
- the present invention also relates to the use of a composition according to the invention for a respiratory protective mask in the field of hygiene and health, environmental protection, DIY, in the food industry, in the clean rooms, in the building and public works, in the metallurgical industry, in the automotive industry and in a broader way in all areas of activity in which operators are placed in contact with dust and particles.
- FIG. 1 illustrates a view from above of the respiratory protection mask comprising a multilayer composition according to a preferred embodiment of the invention
- FIG. 2 is a cross-sectional view showing the stack of the layers of the mask of FIG. 1.
- the multilayer filter composition according to the invention can be applied to respiratory masks having various shapes, for example masks in the form of a shell, a duckbill, a parrot's beak, or others.
- the respiratory protection mask 1 shown in FIG. 1 is of the "duckbill" type.
- the mask is made in a uniform stack of flexible layers, as will be explained later. To facilitate its conditioning, it is folded along its longitudinal plane of symmetry and it then has a generally trapezoidal shape.
- the mask comprises a peripheral edge 2 connected to lateral edges 4.5 extended by a fold 3 located in a frontal area facing the mouth of the user when worn.
- the mask also has a nasal bar 6 and two brackets 7,8.
- the nasal bar 6 is disposed in an outer layer of a nonwoven material and is raised on the outer face of the mask.
- the fixing flanges are elastic, each being fixed inside the lateral edges 4,5.
- the nasal bar 6 is made of a non-expandable and malleable metal or plastic material allowing the mask to be adapted to the morphology of the face and thus to be adjusted to reduce the leakage that may occur between the mask and the face.
- the respiratory protection mask 1 of the invention comprises a stack of filtering layers and compound support, from the outside towards the inside, of: an outer layer 10a, a first layer intermediate 11, two second intermediate layers 12 and an inner layer 10b.
- the mask of the invention is designed to isolate and protect its carrier against the risk of inhalation of infectious agents transmissible by air, such as dust, pollution, viruses, allergens, etc.
- infectious agents transmissible by air such as dust, pollution, viruses, allergens, etc.
- Existing masks standards exist in different countries, standards with specific characteristics, but must broadly meet identical needs. For example, these masks are classified according to:
- a spunbond material is understood to mean a spunbonded web or nonwoven fabric obtained by an extrusion technique, the resulting yarns having a diameter of between 13 ⁇ m and 16 ⁇ m; and "meltblown” material is a nonwoven web of meltblown microfibres obtained by an extrusion blow molding technique, the resulting yarns having a diameter of between 2 ⁇ m and 5 ⁇ m.
- the inner layer 10b and the outer layer 10a are made of a spunbond non-woven fabric (or "spunbond” type) which may be composed of different fibers: polypropylene, polyethylene terephthalate, polyamide, polyethylene, polylactic acid, etc. .
- a spunbond non-woven fabric or "spunbond” type
- Such a fabric has good mechanical strength properties.
- a combination of these fibers can be used to improve the properties of the fabric, for example by combining its strength properties with those of soft touch.
- Chemical additives can further enhance the properties of the fabric, for example by antistatic, antibacterial, etc. treatment.
- the inner layer 10b and the outer layer 10a are each made of a hydrophilic needle spunbond nonwoven fabric of the brand DIPRYL having a basis weight of 20g / m 2 .
- the average values of its tensile strength is 27 kgf / cm z (MD) and 35 kgf / cm 2 (CD) and the maximum elongation (MD / CD) is min 35%.
- This layer forms a support and gives mechanical strength properties to all the layers forming a mask, it plays little or no role in filtration.
- the same needle-bonded spunbond material (having the same characteristics physical or compositional) is used for the three types of European masks FFP1, FFP2, and FFP3 or both types of American masks N95 and N99.
- the second intermediate layer 12 is made of at least one nonwoven web of microfibres meltblown, for example polypropylene, charged with static electricity by Corona effect. This layer has a role of filtration. It is preferably folded in two during its placement between the adjacent layers of the mask, so that, in a preferred embodiment of the invention, the breathing mask 1 comprises two such second intermediate layers 12.
- such a layer is for example of MB08 type from Hollingsworth & Vose, has a basis weight of 27 g / m 2 , a thickness of 0.31 mm, a NaCl penetration of 3% (measured with an air flow of 32 l / min) and a resistance to the passage of an air flow of 32 l / min of about 26 Pa.
- such a second intermediate layer 12 is for example of the MB73 type from Hollingsworth & Vose, has a basis weight of 64 g / m 2 , a thickness of approximately 0.73 mm, a penetration with NaCl (measured with an air flow of 32 l / min) of 0.2% and a resistance to the passage of an air flow of 32 l / min of about 50 Pa.
- the first intermediate layer 11 is a web or a tribocharged nonwoven fabric of felt type, made based on at least two different types of fibers capable of delivering to the fabric opposite electrical charges reinforcing the filtration.
- the resistance to the passage of an air flow at an average speed of 8.2 m / min through this first intermediate layer is less than 10 Pa.
- These fibers may be natural fibers, such as wool, cotton, flax, silk, animal hair (camel, goat lama, etc.) or artificial fibers, such as viscose (which is a cellulose xanthate), cellulose acetate, cellulose acetate tri or rayon, or synthetic fibers, such as polyamide, polyvinyl alcohol, polyester, acrylic, polyolefin (polyethylene, polypropylene and copolymers thereof), polytetrafluoroethylene, polyvinyl chloride, polyurethane, these fibers can be taken alone or in a mixture.
- the fabric includes a mixture of two fibers which can be selected from the preceding fibers so that they are electrostatically charged in an opposite manner.
- this first intermediate layer 11 is made based on a mixture of fibers having a diameter of approximately 20 ⁇ m to 25 ⁇ m, selected so as to exhibit, during their manufacturing process, triboelectric properties and to generate discrete electrical charges of opposite sign on the surface of the fibers, the fibers being cleaned, mixed, and then carded to obtain a controlled weight network.
- the intersecting networks are fixed by needling on a support in a nonwoven spunbond fabric ("spunbond" type).
- spunbond Such a material may for example be made based on a pair of acrylic and polypropylene fibers, and may be, for example, of the Technostat type of Hollingsworth & Vose.
- the electrostatic properties and its realization based on coarse fibers gives to this layer a high capacity of loading of the dust, a low resistance to the passage of air and a good efficiency against the submicron particles.
- the material chosen for the FFP1 type masks has a basis weight of 50 g / m 2 , the surface weight of its support being 15 g / m 2 , a thickness of 1.3 mm, a penetration to the particles (diameter of 0.3 .mu.m) of NaCl of 31% and resistance to the passage of an air flow of average speed of 8.2 m / min estimated at 4.3 Pa.
- the FFP1 mask is intended to protect against non-toxic dusts, for example cellulose, cotton, flour, clay, vegetable and animal oils, or against pollution. It finds its application in the textile industry, agribusiness, DIY, hygiene and cleaning.
- the results of the tests carried out with a mask of FFP1 type of the invention showed a maximum leakage rate of 2.87% which is therefore significantly lower than the maximum allowed by the current standard which is set at 22%.
- the penetration of the filter media with NaCl was found at a maximum of 2.9%, while the maximum rate allowed by the standard in force is 20%.
- the penetration of the filter media with paraffin oil was found to be a maximum of 12.4%, while the maximum rate allowed by the standard in force is 20%.
- Respiratory resistance to inspiration when measured with a flow of 30 l / min, was set at maximum 15 Pa, so it is well below the maximum value allowed by the standard which is 60 Pa; and when measured with a flow rate of 95 l / min, was set at maximum 47 Pa and is therefore well below the normative value of 210 Pa.
- Respiratory resistance at expiration measured with a flow of 160 l / min was maximum 75 Pa, also well below that maximum allowed by the standard is 3 Pa.
- the FFP2 (or N95) mask is designed to protect against concrete dust, cement, plaster (for example during demolition work, rough work, sanding), softwood (from sanding work, cutting), fine particles of paint and resin, plastic materials (eg from impact stripping, sanding, etc.); against viruses (bird flu, SARS, tuberculosis), against environmental pollution or allergens. It finds its application in industry, construction, DIY, woodworking, automotive industry, bodywork and health.
- Respiratory resistance to inspiration when measured with a flow of 30 l / min, was established at maximum 16 Pa, it is therefore lower than the maximum value allowed by the standard which is 70 Pa; and when measured with a flow rate of 95 l / min, was set at maximum 50 Pa and is therefore well below the normative value of 240 Pa.
- Respiratory resistance at expiration measured with a flow of 160 l / min was maximum 86 Pa, also much lower than the maximum allowed by the standard is 300 Pa.
- the FFP3 mask is intended to protect against asbestos fibers with a concentration of less than 1 fiber / cm 3 / h (for example for material handling or diagnosis), rockwool dust, wool dust glass (during handling or insulation work), lead (when sanding paints), hard wood particles, metal fumes; viruses (infectious respiratory diseases), bacteria (such as legionella). It finds its application in industry, construction, woodworking, metallurgy or health.
- Respiratory resistance at inhalation when measured with a flow of 30 l / min, was set at maximum 31 Pa, it is therefore lower than the maximum value allowed by the standard which is 100 Pa; and when measured with a flow of 95 l / min, was set at maximum 99 Pa and is therefore well below the normative value of 300 Pa.
- Respiratory resistance at expiration measured with flow of 160 l / min was maximum 172 Pa, also much lower than the maximum allowed by the standard is 300 Pa.
- the surface of the mask of the invention is between 200cm and 250cm 2 2.
- the mask does not have a breathing valve and, as a result, the filtering and breathing surface is increased with better protection and breathing comfort.
- its weight is less than 6g, which is significantly lower than the weight of a valve mask (valve) which itself is about 12g to 30g.
- the difference in weight is related to the absence of the valve, which reduces the consumption of fossil raw materials and consequently reduces the price of raw materials, and therefore the cost of the breathing mask.
- the respiratory protection mask of the invention is of the flexible and disposable type.
- the respiratory protection mask of the invention is manufactured in
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Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801334632A CN102131549A (zh) | 2008-08-26 | 2009-08-06 | 用于呼吸面罩的多层制品 |
BRPI0917894A BRPI0917894A2 (pt) | 2008-08-26 | 2009-08-06 | composição de múltiplas camadas para máscara respiratória |
CA2734824A CA2734824A1 (fr) | 2008-08-26 | 2009-08-06 | Composition multicouche pour masque respiratoire |
EP09809385A EP2328657A1 (fr) | 2008-08-26 | 2009-08-06 | Composition multicouche pour masque respiratoire |
US13/060,464 US20110209711A1 (en) | 2008-08-26 | 2009-08-06 | Multilayer Composition for a Breathing Mask |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0804700A FR2935272B1 (fr) | 2008-08-26 | 2008-08-26 | Composition multicouche pour masque respiratoire |
FR0804700 | 2008-08-26 |
Publications (2)
Publication Number | Publication Date |
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WO2010023370A1 true WO2010023370A1 (fr) | 2010-03-04 |
WO2010023370A9 WO2010023370A9 (fr) | 2011-03-24 |
Family
ID=40524559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2009/000985 WO2010023370A1 (fr) | 2008-08-26 | 2009-08-06 | Composition multicouche pour masque respiratoire |
Country Status (7)
Country | Link |
---|---|
US (1) | US20110209711A1 (fr) |
EP (1) | EP2328657A1 (fr) |
CN (1) | CN102131549A (fr) |
BR (1) | BRPI0917894A2 (fr) |
CA (1) | CA2734824A1 (fr) |
FR (1) | FR2935272B1 (fr) |
WO (1) | WO2010023370A1 (fr) |
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- 2009-08-06 CN CN2009801334632A patent/CN102131549A/zh active Pending
- 2009-08-06 BR BRPI0917894A patent/BRPI0917894A2/pt not_active IP Right Cessation
- 2009-08-06 WO PCT/FR2009/000985 patent/WO2010023370A1/fr active Application Filing
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- 2009-08-06 EP EP09809385A patent/EP2328657A1/fr not_active Withdrawn
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FR2952582A1 (fr) * | 2009-11-16 | 2011-05-20 | Deltalyo & Valmy | Objet jetable a usage unique |
WO2011058252A1 (fr) * | 2009-11-16 | 2011-05-19 | Deltalyo & Valmy | Objet jetable a usage unique |
KR101910312B1 (ko) * | 2010-05-07 | 2018-10-19 | 니혼바이린 가부시기가이샤 | 대전 필터 및 마스크 |
US20130047856A1 (en) * | 2010-05-07 | 2013-02-28 | Japan Vilene Company, Ltd. | Electrically charged filter and mask |
US9289632B2 (en) * | 2010-05-07 | 2016-03-22 | Japan Vilene Company, Ltd. | Electrically charged filter and mask |
EP2457618A1 (fr) | 2010-11-26 | 2012-05-30 | Eurofilters N.V. | Masque de visage doté de matériaux d'absorption sous forme de poudre appliquée sur des fibres empilées chargées de manière électrostatique |
WO2012069147A1 (fr) | 2010-11-26 | 2012-05-31 | Eurofilters N.V. | Masque facial à matériau absorbant pulvérulent déposé sur des fibres discontinues chargées électrostatiquement |
FR2970845A1 (fr) * | 2011-01-31 | 2012-08-03 | Maco Pharma Sa | Masque respiratoire ayant une grande respirabilite |
WO2012146883A1 (fr) * | 2011-04-28 | 2012-11-01 | Valmy Sas | Filtre hygienique pour masque respiratoire |
FR2974514A1 (fr) * | 2011-04-28 | 2012-11-02 | Deltalyo & Valmy | Filtre hygienique pour masque respiratoire |
WO2013036210A1 (fr) * | 2011-09-06 | 2013-03-14 | Supaphol Pitt | Masque médical revêtu d'extraits de coque de mangoustan |
US9999546B2 (en) | 2014-06-16 | 2018-06-19 | Illinois Tool Works Inc. | Protective headwear with airflow |
US11166852B2 (en) | 2014-06-16 | 2021-11-09 | Illinois Tool Works Inc. | Protective headwear with airflow |
US11812816B2 (en) | 2017-05-11 | 2023-11-14 | Illinois Tool Works Inc. | Protective headwear with airflow |
US20210093904A1 (en) * | 2018-04-30 | 2021-04-01 | Pinostory Co., Ltd. | Emergency anti-gas kit |
US12083365B2 (en) * | 2018-04-30 | 2024-09-10 | Pinostory Co., Ltd. | Emergency anti-gas kit |
Also Published As
Publication number | Publication date |
---|---|
CA2734824A1 (fr) | 2010-03-04 |
FR2935272B1 (fr) | 2010-09-03 |
CN102131549A (zh) | 2011-07-20 |
BRPI0917894A2 (pt) | 2018-02-06 |
US20110209711A1 (en) | 2011-09-01 |
WO2010023370A9 (fr) | 2011-03-24 |
EP2328657A1 (fr) | 2011-06-08 |
FR2935272A1 (fr) | 2010-03-05 |
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