US20100218761A1 - Unitary respirator with molded thermoset elastomeric elements - Google Patents
Unitary respirator with molded thermoset elastomeric elements Download PDFInfo
- Publication number
- US20100218761A1 US20100218761A1 US12/670,556 US67055608A US2010218761A1 US 20100218761 A1 US20100218761 A1 US 20100218761A1 US 67055608 A US67055608 A US 67055608A US 2010218761 A1 US2010218761 A1 US 2010218761A1
- Authority
- US
- United States
- Prior art keywords
- facepiece
- silicone
- body portion
- respiratory protection
- protection composite
- 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.)
- Abandoned
Links
Images
Classifications
-
- 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
- A62B18/02—Masks
- A62B18/025—Halfmasks
-
- 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
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14311—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0053—Producing sealings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14311—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
- B29C2045/14327—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles anchoring by forcing the material to pass through a hole in the article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2081/00—Use of polymers having sulfur, with or without nitrogen, oxygen or carbon only, in the main chain, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
- B29K2083/005—LSR, i.e. liquid silicone rubbers, or derivatives thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/48—Wearing apparel
- B29L2031/4807—Headwear
- B29L2031/4835—Masks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
Definitions
- the present disclosure relates to a unitary respirator with molded thermoset elastomeric elements and particularly to a respirator facepiece with a thermoset elastomeric face seal and another thermoset elastomeric element.
- Half-mask respirators provide respiratory protection from airborne substances with filtering processes and/or otherwise facilitating access to clean air.
- One characteristic of these devices is the seal that is formed between the user and other functional components of the respirator. Respirators often utilize an elastomeric material to form the seal which is often referred to as the “faceseal.”
- the present disclosure relates to a unitary respirator with molded thermoset elastomeric elements and particularly to a respirator facepiece with a thermoset elastomeric face seal and another thermoset elastomeric element.
- This disclosure further relates to a respirator facepiece having a polymeric rigid facepiece body portion and a silicone sealing facepiece element and a second silicone element that is chemically bonded to at least one major surface of the polymeric rigid facepiece body portion.
- the silicone sealing facepiece element and a second silicone element is chemically bonded to at least two major surfaces of the polymeric rigid facepiece body portion.
- the silicone sealing facepiece element and the second silicone element penetrates through at least one aperture in the polymeric rigid facepiece body portion.
- a respiratory protection composite facepiece in a first embodiment, includes a polymeric rigid facepiece body portion having a first surface and a second surface and a silicone sealing facepiece element chemically bonded to at least one of the first surface or the second surface.
- the first and second surfaces can be opposing major surfaces.
- a second silicone element is chemically bonded to at least one of the first surface or the second surface.
- the silicone sealing facepiece element and/or second silicone element may be chemically bonded to at least two opposing major surfaces of the polymeric rigid facepiece body portion.
- the silicone sealing facepiece element and/or second silicone element may in some cases also interpenetrate apertures that extend through the polymeric rigid facepiece body portion.
- the second silicone element may form a diaphragm for the inhalation valve, the exhalation valve, or speaking diaphragm, or form a sealing gasket about an inhalation port, or form at least a portion of headstraps.
- a respiratory protection composite facepiece in another embodiment, includes a polymeric rigid facepiece body portion having a first surface and a second surface and an inhalation port.
- a silicone sealing facepiece element is chemically bonded to at least one of the first surface or the second surface and forming a gasket about the inhalation port.
- the first and second surfaces can be opposing major surfaces.
- the gasket is chemically bonded to at least one of the first surface or the second surface.
- the silicone sealing facepiece element and/or gasket may be chemically bonded to at least two opposing major surfaces of the polymeric rigid facepiece body portion.
- the silicone sealing facepiece element and/or gasket may in some cases also interpenetrate apertures that extend through the polymeric rigid facepiece body portion.
- a method of forming a respiratory protection composite facepiece includes overmolding liquid silicone onto a polymeric rigid facepiece body portion having a first surface and a second surface, where the liquid silicone is in contact with at least one of the first surface or the second surface, and solidifying the liquid silicone to form a silicone sealing facepiece element that chemically bonds to one of the first surface or the second surface.
- a second silicone element is chemically bonded to at least one of the first surface or the second surface, forming a respiratory protection composite facepiece.
- the second silicone element may form a diaphragm for the inhalation valve, the exhalation valve, or speaking diaphragm, or form a sealing gasket about an inhalation port, or form at least a portion of headstraps
- a method of forming a respiratory protection composite facepiece includes overmolding liquid silicone onto a polymeric rigid facepiece body portion having a first surface and a second surface, where the liquid silicone is in contact with at least one of the first surface or the second surface, and solidifying the liquid silicone to form a silicone sealing facepiece element that chemically bonds to one of the first surface or the second surface, and forming a gasket about the inhalation port.
- FIG. 1 is a perspective view of an illustrative respiratory protection mask
- FIG. 2 and FIG. 3 are schematic cross-section views of an illustrative inhalation or exhalation diaphragm valve
- FIG. 4 is a schematic cross-section view of an illustrative speaking diaphragm
- FIG. 5 is a perspective view of an illustrative rigid facepiece body for a respirator protection mask
- FIG. 6 is a perspective front view of the rigid facepiece body shown in FIG. 5 illustrating a silicone sealing facepiece element overmolded onto half of the rigid facepiece body;
- FIG. 7 is a perspective rear view of the rigid facepiece body shown in FIG. 5 illustrating a silicone sealing facepiece element overmolded onto half of the rigid facepiece body;
- FIG. 8 is a schematic cross-sectional view of portion of a respiratory protection composite facepiece illustrating a mechanical interlock created when the liquid silicone interpenetrates an aperture through the rigid facepiece body;
- FIG. 9 is a perspective partial exploded view of an illustrative respiratory protection mask.
- respirator means a personal respiratory protection device that is worn by a person to filter air before the air enters the person's respiratory system. This term includes full face respirators, half mask respirators, supplied air hoods, powered air purifying respirators, and self contained breathing apparatus.
- the present disclosure relates to a unitary respirator with molded thermoset elastomeric elements and particularly to a respirator facepiece with a thermoset elastomeric face seal and another thermoset elastomeric element.
- the present disclosure also relates to a respirator facepiece having an inhalation port and a thermoset elastomeric face seal that also surrounds the inhalation port forming an inhalation port gasket.
- This disclosure further relates to a respirator facepiece having a polymeric rigid facepiece body portion and a silicone sealing facepiece element and a second silicone element that is chemically bonded to one or two major surfaces of the polymeric rigid facepiece body portion.
- the silicone sealing facepiece element and the second silicone element also penetrates through the polymeric rigid facepiece body portion.
- This respirator facepiece can be formed by molding a thermoset silicone sealing facepiece element and a second silicone element onto the polymeric thermoplastic rigid facepiece body portion sequentially or at the same time. These respirator facepieces have a robust bond between the silicone elements and the rigid facepiece body portion. While the present invention is not so limited, an appreciation of various aspects of the invention will be gained through a discussion of the examples provided below.
- the unitary respirator having an overmolded thermoset elastomeric seal and another overmolded element provides a face sealing element and other elastomeric element that is integrally or chemically bonded with the polymeric rigid facepiece body portion.
- This construction has been found to enhance the durability of the elastomeric elements and prevent debris from being interposed between the polymeric rigid facepiece body portion and the thermoset elastomeric elements.
- This integral construction also reduces the number of assembly parts and part size variability.
- the overmolded thermoset elastomeric materials described herein also do not require that the polymeric rigid facepiece body portion be primed in order for the thermoset elastomeric elements to be chemically attached or bonded to the polymeric rigid facepiece body portion.
- FIG. 1 is a perspective view of an illustrative respiratory protection mask 10 .
- the respiratory protection mask 10 includes a respiratory protection composite facepiece 11 attached to number of respiratory protection elements including, for example, one or more inhalation valves with an optional chemical or particulate filtration cartridge 28 connected to one or more of the inhalation valves, one or more exhalation valves 32 , one or more speaking diaphragms and/or one or more headstraps or straps 34 configured to secure the respiratory protection composite facepiece 11 to a user's head.
- respiratory protection composite facepiece 11 attached to number of respiratory protection elements including, for example, one or more inhalation valves with an optional chemical or particulate filtration cartridge 28 connected to one or more of the inhalation valves, one or more exhalation valves 32 , one or more speaking diaphragms and/or one or more headstraps or straps 34 configured to secure the respiratory protection composite facepiece 11 to a user's head.
- the respiratory protection composite facepiece 11 includes a silicone sealing facepiece element 12 overmolded onto a polymeric rigid facepiece body 20 (as described in more detail below).
- the chemical or particulate filtration cartridge 28 to can be either fixedly attached or removably attached to the one or more of the inhalation valves.
- the silicone sealing facepiece element 12 also forms a seal or gasket (as described in more detail below) between the chemical or particulate filtration cartridge 28 and the polymeric rigid facepiece body 20 or inhalation valve (as described in more detail below).
- the chemical or particulate filtration cartridge 28 can have any useful shape, other than the shape illustrated in FIG. 1 .
- FIG. 1 illustrates a respiratory protection mask 10 having two cheek inhalation valves attached to a chemical or particulate filtration cartridge 28 and one nose exhalation valve 32
- the respiratory protection mask 10 can have a single inhalation valve attached to a chemical or particulate filtration cartridge 28 or clean air supply and one or two exhalation valves or one or more speaking diaphragms, as desired.
- FIG. 2 and FIG. 3 are schematic cross-section views of an illustrative inhalation or exhalation valve.
- FIG. 4 is a schematic cross-section view of an illustrative speaking diaphragm. These inhalation or exhalation valves or speaking diaphragm are located within or adjacent to the plurality of openings of the rigid facepiece body 20 , described below.
- FIG. 2 illustrates a partial schematic diagram of a diaphragm valve disposed between an exterior area 1 or 2 and an interior area 2 or 1 of the illustrative respiratory protection mask 10 .
- the valve 25 is an inhalation valve when the diaphragm 26 is disposed between the rigid facepiece body 20 and the user's face or the interior area 2 of the illustrative respiratory protection mask 10 .
- the valve 25 is an exhalation valve when the diaphragm 26 is disposed between the rigid facepiece body 20 and the exterior area 1 of the illustrative respiratory protection mask 10 .
- FIG. 3 illustrates the valve allowing either inhalation air 5 or exhalation air 5 to pass between the diaphragm 26 and the valve body or rigid facepiece body 20 .
- the exemplary diaphragm 26 is attached to a valve support element 19 that anchors the diaphragm 26 to the valve body or rigid facepiece body 20 .
- One or more struts 17 can connect the support element 19 that anchors the diaphragm to the valve body or rigid facepiece body 20 .
- FIG. 4 illustrates a partial schematic diagram of a speaking diaphragm.
- the illustrative speaking diaphragm includes a diaphragm 27 fixed to the rigid facepiece body 20 . While the diaphragm 27 is illustrated being sandwiched between two rigid facepiece body 20 body portions, the diaphragm 27 may be simply chemically bonded to one or both of the first surface and a second surface (described below) and may penetrate through at least one aperture in the polymeric rigid facepiece body portion (described generally below).
- the diaphragm 27 is disposed between the exterior area 1 or 2 and an interior area 2 or 1 of the illustrative respiratory protection mask 10 .
- the speaking diaphragm 27 assists in the transmission of speech from the respiratory protection mask 10 user.
- FIG. 5 is a perspective front view of an illustrative rigid facepiece body 20 for a respirator protection mask 10 .
- the rigid facepiece body 20 includes a first surface 21 and a second surface 22 .
- the first surface 21 and a second surface 22 are opposing major surfaces of the rigid facepiece body 20 , separated by a body thickness T.
- the first surface 21 is an outer surface (directed toward the environment) and the second surface 22 is an inner surface (directed toward a user's face).
- the illustrated rigid facepiece body 20 includes a plurality of openings or ports such as, for example, a nose opening 16 and two cheek openings 18 .
- At least one inhalation valve including a diaphragm (not shown) and one exhalation valve including a diaphragm (not shown) are disposed within the plurality of ports or openings and forms the illustrated rigid facepiece body 20 .
- a speaking diaphragm is disposed within one or more of the plurality of ports or openings.
- one or more apertures 23 extend through the body thickness T.
- liquid silicone that forms the silicone sealing facepiece element 12
- the inhalation valve includes a chemical or particulate filtration cartridge attachment element 29 .
- the attachment element 29 is a bayonet attachment element that mates with a complementary element on the chemical or particulate filtration cartridge attachment element 29 .
- a bayonet attachment system is configured for attaching two portions together, where the two portions include elements other than mainly threads such that the two portions are attached by inserting one portion at least partially within the other portion and rotating one portion relative to the other portion so that the two portions can be joined without multiple turns.
- FIG. 6 is a perspective front view of the rigid facepiece body 20 shown in FIG. 5 with a silicone sealing facepiece element 12 overmolded onto half of the rigid facepiece body 20 .
- FIG. 7 is a perspective rear view of the rigid facepiece body shown in FIG. 5 with a silicone sealing facepiece element overmolded onto half of the rigid facepiece body.
- the exemplary respiratory protection composite facepiece 11 includes the silicone sealing facepiece element 12 overmolded onto both halves of the rigid facepiece body 20 , but is shown as a cross-section of the silicone sealing facepiece element 12 to more easily illustrate the contour of the silicone sealing facepiece element 12 .
- the rigid facepiece body 20 is described above.
- the silicone sealing facepiece element 12 is chemically bonded to at least one of a first surface and a second surface of the rigid facepiece body 20 , such the first surface 21 and/or the second surface 22 .
- the silicone sealing facepiece element 12 is chemically bonded to at least one of the first surface 21 and the second surface 22 , where the first surface 21 and a second surface 22 are major surfaces of the rigid facepiece body 20 , separated by a body thickness T, as described above.
- a second silicone element is chemically bonded to at least the first surface 21 and/or the second surface 22 .
- the second silicone element can be any silicone element or component useful in a respiratory protection mask.
- the second silicone element can be, for example, a diaphragm for the inhalation valve, exhalation valve, or speaking diaphragm, or form a sealing gasket about an inhalation port, or form at least a portion of headstraps, for example.
- the second silicone element can be formed (e.g., overmolded) at the same time or sequentially as the silicone sealing facepiece element 12 is formed (e.g., overmolded).
- liquid silicone that forms the silicone sealing facepiece element 12 or second silicone element
- the second silicone element is formed by liquid silicone that flows onto at least the first surface 21 and/or the second surface 22 and optionally through one or more apertures in the mask body and forms a mechanical interlock between the mask body and the second silicone element, once the liquid silicone is cured to its solid state.
- FIG. 8 illustrates a schematic cross-sectional view of portion of a respiratory protection composite facepiece 11 illustrating a mechanical interlock created when the liquid silicone interpenetrates an aperture 23 through the rigid facepiece body 20 .
- the silicone sealing facepiece element 12 and/or second silicone element can be disposed on and chemically bonded to the first surface 21 and/or the second surface 22 , where the first surface 21 and a second surface 22 are major surfaces of the rigid facepiece body 20 , separated by a body thickness T, as described above.
- the silicone sealing facepiece element 12 is configured to form an air-tight seal between a user's head or face and the rigid facepiece body 20 .
- air-tight seal refers to a connection of the silicone sealing facepiece element 12 to the user's face or head that substantially prevents unfiltered or ambient air from entering an interior portion of the respiratory protection composite facepiece 11 at the connection interface.
- the illustrated silicone sealing facepiece element 12 includes an in-turned feathered cuff 14 that contacts a user's face.
- Air-tightness is measured with a vacuum leak test.
- the test fixture consists of a sealed chamber with three ports. The volume of the chamber is approximately 750 cm 3 .
- a respirator attachment component is affixed to one of the three ports by means of its bayonet attachment element.
- a vacuum gauge capable of measuring the pressure differential between the inside of the chamber and the ambient air (to at least 25 cm water) is attached to a second port on the fixture.
- a vacuum source is attached to the third port through a shut off valve. To conduct the test, the shut-off valve is opened and the vacuum source is turned on to evacuate the chamber to a pressure of 25 cm water below atmospheric pressure (as indicated by the vacuum gauge). The shut-off valve is then closed and the vacuum source is turned off. The vacuum level inside the chamber is monitored for 60 seconds.
- the pressure differential between the chamber and the ambient air is greater than 15 cm of water after 60 seconds. More preferably, the pressure differential remains above 24 cm of water after 60 seconds.
- the respiratory protection composite facepiece 11 can be formed by overmolding a thermosetting silicone material onto a thermoplastic rigid facepiece body 20 .
- the thermosetting silicone material chemically bonds (i.e., adhesive bonding or covalent bonding) to the thermoplastic rigid facepiece body 20 .
- thermosetting silicone material is selected so that pretreatment of the thermoplastic rigid facepiece body 20 is not necessary.
- the thermosetting silicone material is self-adhesive with the thermoplastic rigid facepiece body 20 .
- the thermosetting silicone material is often heated to cure the thermosetting silicone material during the overmolding process to a temperature sufficient to cure the thermosetting silicone material but less than a glass transition temperature of the thermoplastic rigid facepiece body 20 .
- the level of chemical bonding can be determined by the average force to failure test method.
- the average force to failure is 25 N or greater, 50 N or greater, or 100 N or greater, or 150 N or greater, or 200 N or greater, or 300 N or greater.
- thermoplastic rigid facepiece body 20 can be formed of any useful thermoplastic material.
- the thermoplastic rigid facepiece body 20 is formed of a polyamide (e.g., nylon), a polycarbonate, polybutylene-terephthalate, polyphenyl oxide, polyphthalamide, or mixtures thereof.
- thermosetting liquid silicone rubber or material can be utilized to form the silicone sealing facepiece element 12 and second silicone element.
- Liquid silicone rubber is a high purity platinum cured silicone with low compression set, great stability and ability to resist extreme temperatures of heat and cold. Due to the thermosetting nature of the material, liquid silicone injection molding often requires special treatment, such as intensive distributive mixing, while maintaining the material cool before it is pushed into the heated cavity and vulcanized.
- Silicone rubber is a family of thermoset elastomerics that have a backbone of alternating silicone and oxygen atoms and methyl or vinyl side groups. Silicone rubbers constitute about 30% of the silicone family, making them the largest group of that family. Silicone rubbers maintain their mechanical properties over a wide range of temperatures and the presence of methyl-groups in silicone rubbers makes these materials hydrophobic.
- thermosetting silicone material includes self-adhesive liquid silicone rubbers available under the trade designation: ELASTOSIL LR 3070 from Wacker-Silicones, Kunststoff, Germany; the KE2095 or KE2009 series (such as, for example, KE2095-60, KE2095-50, KE2095-40) or X-34-1547A/B, X-34-1625A/B, X-34-1625A/B all from Shin-Etsu Chemical Co., LTD., Japan.
- ELASTOSIL LR 3070 from Wacker-Silicones, Kunststoff, Germany
- KE2095 or KE2009 series such as, for example, KE2095-60, KE2095-50, KE2095-40
- X-34-1547A/B X-34-1625A/B
- X-34-1625A/B all from Shin-Etsu Chemical Co., LTD., Japan.
- These self-adhesive liquid silicone rubbers do not require pretreatment of certain thermoplastic surfaces for
- FIG. 9 is a perspective partial exploded view of an illustrative respiratory protection mask 11 .
- the mask includes a rigid facepiece body 20 is described above, a silicone sealing facepiece element 12 is chemically bonded to the rigid facepiece body 20 , a nose opening 16 and two cheek openings 18 .
- At least one inhalation port 18 or valve including a diaphragm (i.e., second silicone element) and one exhalation port 16 or valve including a diaphragm 26 (i.e., second silicone element) is disposed within the plurality of ports or openings.
- a silicone gasket 31 i.e., second silicone element
- the silicone gasket 31 forms an air-tight seal with the chemical or particulate filtration cartridge 28 and the rigid facepiece body 20 .
- silicone gasket 31 and silicone exhalation diaphragm 26 can be formed simultaneous or sequentially and chemically bonded to the to the rigid facepiece body 20 .
- silicone gasket 31 and silicone exhalation diaphragm 26 (and inhalation diaphragms) penetrate through the rigid facepiece body 20 as illustrated in FIGS. 2 , 3 , and 8 .
- the chemical or particulate filtration cartridge 28 to can be either fixedly attached or removably attached to the chemical or particulate filtration cartridge attachment element 29 .
- the chemical or particulate filtration cartridge 28 can have any useful shape, other than the shape illustrated in FIG. 9 .
- the test strip is prepared by molding a rigid, flat substrate piece 51 mm long, 25 mm wide, and 2 mm thick with thermoplastic material. The substrate is then clamped into a second mold such that 6 mm of one end of the substrate protrudes into the cavity of the second mold.
- the cavity of the second mold is 27 mm wide and 49 mm long.
- the depth of the mold is 2 mm, expanding to 4 mm in the immediate vicinity of the protruding substrate end, such that when silicone is injected into the mold cavity it forms a layer 1 mm thick on all sides of the protruding substrate end.
- the resulting test strip is thus 94 mm long, with a rigid thermoplastic substrate piece on one end and silicone rubber on the other end.
- the strength of the bond between the substrate material and silicone is measured by gripping the two ends of the test strip in the jaws of a mechanical tester such as an MTS Model 858 Material Test System (MTS Systems Corporation, Eden Prairie, Minn.), stretching it until the test strip breaks apart, and recording the force at which failure occurs. Examples of the force to failure are shown in Table 1. Examples 1 through 4 show that bond strengths greater than 300 N can be achieved with the appropriate combination of materials. For Comparative Examples C1 and C2, the silicone did not bond to the thermoplastic material.
- Thermoplastic Average Force Example Silicone Substrate to Failure (N) 1 Shin-Etsu KE2095 60 RTP Nylon 6/6 136 2 Wacker 3070-60 RTP Nylon 6/6 303 3 Dow LC-70-2004 Zytel PA 174 4 Wacker 3070-60 Zytel PA 166 C1 Dow LC-70-2004 RTP Nylon 6/6 No bonding C2 Shin-Etsu KE2095 60 Zytel PA No bonding Dow LC-70-2004 silicone is produced by Dow Corning Corporation, Midland MI; RTP Nylon 6/6 is a polyamide produced by RTP Company, Winona, MN; Zytel PA is a polyamide produced by E.I. du Pont de Nemours, Wilmington, DE.
Landscapes
- Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- General Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Pulmonology (AREA)
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
A respiratory protection composite facepiece is disclosed and includes a polymeric rigid facepiece body portion having a first surface and a second surface and a silicone sealing facepiece element chemically bonded at least one of the first surface or the second surface. The first and second surfaces can be opposing major surfaces. A second silicone element is chemically bonded to at least one of the first surface or the second surface. Methods of making the same are also disclosed.
Description
- The present disclosure relates to a unitary respirator with molded thermoset elastomeric elements and particularly to a respirator facepiece with a thermoset elastomeric face seal and another thermoset elastomeric element.
- Half-mask respirators provide respiratory protection from airborne substances with filtering processes and/or otherwise facilitating access to clean air. One characteristic of these devices is the seal that is formed between the user and other functional components of the respirator. Respirators often utilize an elastomeric material to form the seal which is often referred to as the “faceseal.”
- One design consideration with these respirators is the air-tight fastening of the elastomeric faceseal with the solid structural components of the respirator. This air-tight seal often requires a mechanical seal that adds complexity and cost to the respirator design. Another design consideration is the formation and attachment of other elastomeric elements of the respirator. These other elastomeric elements also add complexity and cost to the respirator design.
- The present disclosure relates to a unitary respirator with molded thermoset elastomeric elements and particularly to a respirator facepiece with a thermoset elastomeric face seal and another thermoset elastomeric element. This disclosure further relates to a respirator facepiece having a polymeric rigid facepiece body portion and a silicone sealing facepiece element and a second silicone element that is chemically bonded to at least one major surface of the polymeric rigid facepiece body portion. In many embodiments, the silicone sealing facepiece element and a second silicone element is chemically bonded to at least two major surfaces of the polymeric rigid facepiece body portion. In some embodiments, the silicone sealing facepiece element and the second silicone element penetrates through at least one aperture in the polymeric rigid facepiece body portion.
- In a first embodiment, a respiratory protection composite facepiece includes a polymeric rigid facepiece body portion having a first surface and a second surface and a silicone sealing facepiece element chemically bonded to at least one of the first surface or the second surface. The first and second surfaces can be opposing major surfaces. A second silicone element is chemically bonded to at least one of the first surface or the second surface. In some embodiments, the silicone sealing facepiece element and/or second silicone element may be chemically bonded to at least two opposing major surfaces of the polymeric rigid facepiece body portion. The silicone sealing facepiece element and/or second silicone element may in some cases also interpenetrate apertures that extend through the polymeric rigid facepiece body portion. The second silicone element may form a diaphragm for the inhalation valve, the exhalation valve, or speaking diaphragm, or form a sealing gasket about an inhalation port, or form at least a portion of headstraps.
- In another embodiment, a respiratory protection composite facepiece includes a polymeric rigid facepiece body portion having a first surface and a second surface and an inhalation port. A silicone sealing facepiece element is chemically bonded to at least one of the first surface or the second surface and forming a gasket about the inhalation port. The first and second surfaces can be opposing major surfaces. The gasket is chemically bonded to at least one of the first surface or the second surface. In some embodiments, the silicone sealing facepiece element and/or gasket may be chemically bonded to at least two opposing major surfaces of the polymeric rigid facepiece body portion. The silicone sealing facepiece element and/or gasket may in some cases also interpenetrate apertures that extend through the polymeric rigid facepiece body portion.
- In a further embodiment, a method of forming a respiratory protection composite facepiece includes overmolding liquid silicone onto a polymeric rigid facepiece body portion having a first surface and a second surface, where the liquid silicone is in contact with at least one of the first surface or the second surface, and solidifying the liquid silicone to form a silicone sealing facepiece element that chemically bonds to one of the first surface or the second surface. A second silicone element is chemically bonded to at least one of the first surface or the second surface, forming a respiratory protection composite facepiece. The second silicone element may form a diaphragm for the inhalation valve, the exhalation valve, or speaking diaphragm, or form a sealing gasket about an inhalation port, or form at least a portion of headstraps
- In a still further embodiment, a method of forming a respiratory protection composite facepiece includes overmolding liquid silicone onto a polymeric rigid facepiece body portion having a first surface and a second surface, where the liquid silicone is in contact with at least one of the first surface or the second surface, and solidifying the liquid silicone to form a silicone sealing facepiece element that chemically bonds to one of the first surface or the second surface, and forming a gasket about the inhalation port.
- The invention may be more completely understood in consideration of the following detailed description of various embodiments of the invention in connection with the accompanying drawings, in which:
-
FIG. 1 is a perspective view of an illustrative respiratory protection mask; -
FIG. 2 andFIG. 3 are schematic cross-section views of an illustrative inhalation or exhalation diaphragm valve; -
FIG. 4 is a schematic cross-section view of an illustrative speaking diaphragm; -
FIG. 5 is a perspective view of an illustrative rigid facepiece body for a respirator protection mask; -
FIG. 6 is a perspective front view of the rigid facepiece body shown inFIG. 5 illustrating a silicone sealing facepiece element overmolded onto half of the rigid facepiece body; -
FIG. 7 is a perspective rear view of the rigid facepiece body shown inFIG. 5 illustrating a silicone sealing facepiece element overmolded onto half of the rigid facepiece body; -
FIG. 8 is a schematic cross-sectional view of portion of a respiratory protection composite facepiece illustrating a mechanical interlock created when the liquid silicone interpenetrates an aperture through the rigid facepiece body; and -
FIG. 9 is a perspective partial exploded view of an illustrative respiratory protection mask. - The figures are not necessarily to scale. Like numbers used in the figures refer to like components. However, it will be understood that the use of a number to refer to a component in a given figure is not intended to limit the component in another figure labeled with the same number.
- In the following description, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration several specific embodiments. It is to be understood that other embodiments are contemplated and may be made without departing from the scope or spirit of the present invention. The following detailed description, therefore, is not to be taken in a limiting sense.
- All scientific and technical terms used herein have meanings commonly used in the art unless otherwise specified. The definitions provided herein are to facilitate understanding of certain terms used frequently herein and are not meant to limit the scope of the present disclosure.
- Unless otherwise indicated, all numbers expressing feature sizes, amounts, and physical properties used in the specification and claims are to be understood as being modified in all instances by the term “about.” Accordingly, unless indicated to the contrary, the numerical parameters set forth in the foregoing specification and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by those skilled in the art utilizing the teachings disclosed herein.
- The recitation of numerical ranges by endpoints includes all numbers subsumed within that range (e.g. 1 to 5 includes 1, 1.5, 2, 2.75, 3, 3.80, 4, and 5) and any range within that range.
- As used in this specification and the appended claims, the singular forms “a”, “an”, and “the” encompass embodiments having plural referents, unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term “or” is generally employed in its sense including “and/or” unless the content clearly dictates otherwise.
- The term “respirator” means a personal respiratory protection device that is worn by a person to filter air before the air enters the person's respiratory system. This term includes full face respirators, half mask respirators, supplied air hoods, powered air purifying respirators, and self contained breathing apparatus.
- The present disclosure relates to a unitary respirator with molded thermoset elastomeric elements and particularly to a respirator facepiece with a thermoset elastomeric face seal and another thermoset elastomeric element. The present disclosure also relates to a respirator facepiece having an inhalation port and a thermoset elastomeric face seal that also surrounds the inhalation port forming an inhalation port gasket. This disclosure further relates to a respirator facepiece having a polymeric rigid facepiece body portion and a silicone sealing facepiece element and a second silicone element that is chemically bonded to one or two major surfaces of the polymeric rigid facepiece body portion. In some embodiments, the silicone sealing facepiece element and the second silicone element also penetrates through the polymeric rigid facepiece body portion. This respirator facepiece can be formed by molding a thermoset silicone sealing facepiece element and a second silicone element onto the polymeric thermoplastic rigid facepiece body portion sequentially or at the same time. These respirator facepieces have a robust bond between the silicone elements and the rigid facepiece body portion. While the present invention is not so limited, an appreciation of various aspects of the invention will be gained through a discussion of the examples provided below.
- The unitary respirator having an overmolded thermoset elastomeric seal and another overmolded element provides a face sealing element and other elastomeric element that is integrally or chemically bonded with the polymeric rigid facepiece body portion. This construction has been found to enhance the durability of the elastomeric elements and prevent debris from being interposed between the polymeric rigid facepiece body portion and the thermoset elastomeric elements. This integral construction also reduces the number of assembly parts and part size variability. The overmolded thermoset elastomeric materials described herein also do not require that the polymeric rigid facepiece body portion be primed in order for the thermoset elastomeric elements to be chemically attached or bonded to the polymeric rigid facepiece body portion.
-
FIG. 1 is a perspective view of an illustrativerespiratory protection mask 10. Therespiratory protection mask 10 includes a respiratoryprotection composite facepiece 11 attached to number of respiratory protection elements including, for example, one or more inhalation valves with an optional chemical orparticulate filtration cartridge 28 connected to one or more of the inhalation valves, one ormore exhalation valves 32, one or more speaking diaphragms and/or one or more headstraps or straps 34 configured to secure the respiratoryprotection composite facepiece 11 to a user's head. - The respiratory
protection composite facepiece 11 includes a siliconesealing facepiece element 12 overmolded onto a polymeric rigid facepiece body 20 (as described in more detail below). The chemical orparticulate filtration cartridge 28 to can be either fixedly attached or removably attached to the one or more of the inhalation valves. In some embodiments, the siliconesealing facepiece element 12 also forms a seal or gasket (as described in more detail below) between the chemical orparticulate filtration cartridge 28 and the polymericrigid facepiece body 20 or inhalation valve (as described in more detail below). The chemical orparticulate filtration cartridge 28 can have any useful shape, other than the shape illustrated inFIG. 1 . - While
FIG. 1 illustrates arespiratory protection mask 10 having two cheek inhalation valves attached to a chemical orparticulate filtration cartridge 28 and onenose exhalation valve 32, any useful respiratory protection configuration is possible. For example, therespiratory protection mask 10 can have a single inhalation valve attached to a chemical orparticulate filtration cartridge 28 or clean air supply and one or two exhalation valves or one or more speaking diaphragms, as desired. -
FIG. 2 andFIG. 3 are schematic cross-section views of an illustrative inhalation or exhalation valve.FIG. 4 is a schematic cross-section view of an illustrative speaking diaphragm. These inhalation or exhalation valves or speaking diaphragm are located within or adjacent to the plurality of openings of therigid facepiece body 20, described below. -
FIG. 2 illustrates a partial schematic diagram of a diaphragm valve disposed between anexterior area interior area respiratory protection mask 10. Thevalve 25 is an inhalation valve when thediaphragm 26 is disposed between therigid facepiece body 20 and the user's face or theinterior area 2 of the illustrativerespiratory protection mask 10. Thevalve 25 is an exhalation valve when thediaphragm 26 is disposed between therigid facepiece body 20 and theexterior area 1 of the illustrativerespiratory protection mask 10.FIG. 3 illustrates the valve allowing eitherinhalation air 5 orexhalation air 5 to pass between thediaphragm 26 and the valve body orrigid facepiece body 20. Theexemplary diaphragm 26 is attached to avalve support element 19 that anchors thediaphragm 26 to the valve body orrigid facepiece body 20. One or more struts 17 (seeFIG. 5 ) can connect thesupport element 19 that anchors the diaphragm to the valve body orrigid facepiece body 20. -
FIG. 4 illustrates a partial schematic diagram of a speaking diaphragm. The illustrative speaking diaphragm includes adiaphragm 27 fixed to therigid facepiece body 20. While thediaphragm 27 is illustrated being sandwiched between tworigid facepiece body 20 body portions, thediaphragm 27 may be simply chemically bonded to one or both of the first surface and a second surface (described below) and may penetrate through at least one aperture in the polymeric rigid facepiece body portion (described generally below). Thediaphragm 27 is disposed between theexterior area interior area respiratory protection mask 10. The speakingdiaphragm 27 assists in the transmission of speech from therespiratory protection mask 10 user. -
FIG. 5 is a perspective front view of an illustrativerigid facepiece body 20 for arespirator protection mask 10. Therigid facepiece body 20 includes afirst surface 21 and asecond surface 22. In the illustrated embodiment, thefirst surface 21 and asecond surface 22 are opposing major surfaces of therigid facepiece body 20, separated by a body thickness T. In the illustrated embodiment, thefirst surface 21 is an outer surface (directed toward the environment) and thesecond surface 22 is an inner surface (directed toward a user's face). The illustratedrigid facepiece body 20 includes a plurality of openings or ports such as, for example, anose opening 16 and twocheek openings 18. At least one inhalation valve including a diaphragm (not shown) and one exhalation valve including a diaphragm (not shown) are disposed within the plurality of ports or openings and forms the illustratedrigid facepiece body 20. In some embodiments, a speaking diaphragm is disposed within one or more of the plurality of ports or openings. - In many embodiments, one or
more apertures 23 extend through the body thickness T. During the overmolding manufacture of the respiratoryprotection composite facepiece 11 liquid silicone (that forms the silicone sealing facepiece element 12) flows through the one ormore apertures 23 and forms a mechanical interlock between the siliconesealing facepiece element 12 and therigid facepiece body 20. In some embodiments, the inhalation valve includes a chemical or particulate filtrationcartridge attachment element 29. In many embodiments, theattachment element 29 is a bayonet attachment element that mates with a complementary element on the chemical or particulate filtrationcartridge attachment element 29. A bayonet attachment system is configured for attaching two portions together, where the two portions include elements other than mainly threads such that the two portions are attached by inserting one portion at least partially within the other portion and rotating one portion relative to the other portion so that the two portions can be joined without multiple turns. -
FIG. 6 is a perspective front view of therigid facepiece body 20 shown inFIG. 5 with a siliconesealing facepiece element 12 overmolded onto half of therigid facepiece body 20.FIG. 7 is a perspective rear view of the rigid facepiece body shown inFIG. 5 with a silicone sealing facepiece element overmolded onto half of the rigid facepiece body. It is understood that the exemplary respiratoryprotection composite facepiece 11 includes the siliconesealing facepiece element 12 overmolded onto both halves of therigid facepiece body 20, but is shown as a cross-section of the siliconesealing facepiece element 12 to more easily illustrate the contour of the siliconesealing facepiece element 12. - The
rigid facepiece body 20 is described above. The siliconesealing facepiece element 12 is chemically bonded to at least one of a first surface and a second surface of therigid facepiece body 20, such thefirst surface 21 and/or thesecond surface 22. In many embodiments, the siliconesealing facepiece element 12 is chemically bonded to at least one of thefirst surface 21 and thesecond surface 22, where thefirst surface 21 and asecond surface 22 are major surfaces of therigid facepiece body 20, separated by a body thickness T, as described above. - A second silicone element is chemically bonded to at least the
first surface 21 and/or thesecond surface 22. The second silicone element can be any silicone element or component useful in a respiratory protection mask. The second silicone element can be, for example, a diaphragm for the inhalation valve, exhalation valve, or speaking diaphragm, or form a sealing gasket about an inhalation port, or form at least a portion of headstraps, for example. The second silicone element can be formed (e.g., overmolded) at the same time or sequentially as the siliconesealing facepiece element 12 is formed (e.g., overmolded). - During the overmolding manufacture of the respiratory
protection composite facepiece 11 liquid silicone (that forms the siliconesealing facepiece element 12 or second silicone element) flows through the one ormore apertures 23 and forms a mechanical interlock between the siliconesealing facepiece element 12 and therigid facepiece body 20 once the liquid silicone is cured to its solid state. During this overmolding process, or in a sequential overmolding process, the second silicone element is formed by liquid silicone that flows onto at least thefirst surface 21 and/or thesecond surface 22 and optionally through one or more apertures in the mask body and forms a mechanical interlock between the mask body and the second silicone element, once the liquid silicone is cured to its solid state. -
FIG. 8 illustrates a schematic cross-sectional view of portion of a respiratoryprotection composite facepiece 11 illustrating a mechanical interlock created when the liquid silicone interpenetrates anaperture 23 through therigid facepiece body 20. The siliconesealing facepiece element 12 and/or second silicone element can be disposed on and chemically bonded to thefirst surface 21 and/or thesecond surface 22, where thefirst surface 21 and asecond surface 22 are major surfaces of therigid facepiece body 20, separated by a body thickness T, as described above. - Referring back to
FIG. 6 andFIG. 7 , the siliconesealing facepiece element 12 is configured to form an air-tight seal between a user's head or face and therigid facepiece body 20. The term “air-tight seal” refers to a connection of the siliconesealing facepiece element 12 to the user's face or head that substantially prevents unfiltered or ambient air from entering an interior portion of the respiratoryprotection composite facepiece 11 at the connection interface. The illustrated siliconesealing facepiece element 12 includes an in-turnedfeathered cuff 14 that contacts a user's face. - Air-tightness is measured with a vacuum leak test. The test fixture consists of a sealed chamber with three ports. The volume of the chamber is approximately 750 cm3. A respirator attachment component is affixed to one of the three ports by means of its bayonet attachment element. A vacuum gauge capable of measuring the pressure differential between the inside of the chamber and the ambient air (to at least 25 cm water) is attached to a second port on the fixture. A vacuum source is attached to the third port through a shut off valve. To conduct the test, the shut-off valve is opened and the vacuum source is turned on to evacuate the chamber to a pressure of 25 cm water below atmospheric pressure (as indicated by the vacuum gauge). The shut-off valve is then closed and the vacuum source is turned off. The vacuum level inside the chamber is monitored for 60 seconds. Inward leakage of air causes the pressure inside the chamber to increase, thereby reducing the vacuum level. For the current invention, the pressure differential between the chamber and the ambient air is greater than 15 cm of water after 60 seconds. More preferably, the pressure differential remains above 24 cm of water after 60 seconds.
- The respiratory
protection composite facepiece 11 can be formed by overmolding a thermosetting silicone material onto a thermoplasticrigid facepiece body 20. The thermosetting silicone material chemically bonds (i.e., adhesive bonding or covalent bonding) to the thermoplasticrigid facepiece body 20. - The terms “chemical bonding or chemically bonded” refer to physical processes responsible for the attractive interactions between atoms and molecules and includes covalent and ionic bonds, as well as hydrogen and van der Waal's bonds and can often depend on available functional groups on the
rigid facepiece body 20 surface and their reactivity with the thermosetting silicone material. In many embodiments, the thermosetting silicone material is selected so that pretreatment of the thermoplasticrigid facepiece body 20 is not necessary. In other words, the thermosetting silicone material is self-adhesive with the thermoplasticrigid facepiece body 20. The thermosetting silicone material is often heated to cure the thermosetting silicone material during the overmolding process to a temperature sufficient to cure the thermosetting silicone material but less than a glass transition temperature of the thermoplasticrigid facepiece body 20. - As shown in the Examples below, the level of chemical bonding can be determined by the average force to failure test method. In many embodiments, the average force to failure is 25 N or greater, 50 N or greater, or 100 N or greater, or 150 N or greater, or 200 N or greater, or 300 N or greater.
- The thermoplastic
rigid facepiece body 20 can be formed of any useful thermoplastic material. In many embodiments, the thermoplasticrigid facepiece body 20 is formed of a polyamide (e.g., nylon), a polycarbonate, polybutylene-terephthalate, polyphenyl oxide, polyphthalamide, or mixtures thereof. - Any useful thermosetting liquid silicone rubber or material can be utilized to form the silicone
sealing facepiece element 12 and second silicone element. Liquid silicone rubber is a high purity platinum cured silicone with low compression set, great stability and ability to resist extreme temperatures of heat and cold. Due to the thermosetting nature of the material, liquid silicone injection molding often requires special treatment, such as intensive distributive mixing, while maintaining the material cool before it is pushed into the heated cavity and vulcanized. Silicone rubber is a family of thermoset elastomerics that have a backbone of alternating silicone and oxygen atoms and methyl or vinyl side groups. Silicone rubbers constitute about 30% of the silicone family, making them the largest group of that family. Silicone rubbers maintain their mechanical properties over a wide range of temperatures and the presence of methyl-groups in silicone rubbers makes these materials hydrophobic. - Illustrative thermosetting silicone material includes self-adhesive liquid silicone rubbers available under the trade designation: ELASTOSIL LR 3070 from Wacker-Silicones, Munich, Germany; the KE2095 or KE2009 series (such as, for example, KE2095-60, KE2095-50, KE2095-40) or X-34-1547A/B, X-34-1625A/B, X-34-1625A/B all from Shin-Etsu Chemical Co., LTD., Japan. These self-adhesive liquid silicone rubbers do not require pretreatment of certain thermoplastic surfaces for the liquid silicone rubbers to chemically bond to the thermoplastic surface.
-
FIG. 9 is a perspective partial exploded view of an illustrativerespiratory protection mask 11. The mask includes arigid facepiece body 20 is described above, a siliconesealing facepiece element 12 is chemically bonded to therigid facepiece body 20, anose opening 16 and twocheek openings 18. At least oneinhalation port 18 or valve including a diaphragm (i.e., second silicone element) and oneexhalation port 16 or valve including a diaphragm 26 (i.e., second silicone element) is disposed within the plurality of ports or openings. A silicone gasket 31 (i.e., second silicone element) is disposed about the chemical or particulate filtrationcartridge attachment element 29 andinhalation port 18 or valve. Thesilicone gasket 31 forms an air-tight seal with the chemical orparticulate filtration cartridge 28 and therigid facepiece body 20. - The
silicone gasket 31 and silicone exhalation diaphragm 26 (and inhalation diaphragms) can be formed simultaneous or sequentially and chemically bonded to the to therigid facepiece body 20. In some embodiments,silicone gasket 31 and silicone exhalation diaphragm 26 (and inhalation diaphragms) penetrate through therigid facepiece body 20 as illustrated inFIGS. 2 , 3, and 8. - The chemical or
particulate filtration cartridge 28 to can be either fixedly attached or removably attached to the chemical or particulate filtrationcartridge attachment element 29. The chemical orparticulate filtration cartridge 28 can have any useful shape, other than the shape illustrated inFIG. 9 . - Several tests were used to identify suitable combinations of silicone rubbers and thermoplastic materials. Of particular interest is the strength of the bond between the silicone rubber and thermoplastic material, which affects the durability of the air-tight seal.
- The test strip is prepared by molding a rigid, flat substrate piece 51 mm long, 25 mm wide, and 2 mm thick with thermoplastic material. The substrate is then clamped into a second mold such that 6 mm of one end of the substrate protrudes into the cavity of the second mold. The cavity of the second mold is 27 mm wide and 49 mm long. The depth of the mold is 2 mm, expanding to 4 mm in the immediate vicinity of the protruding substrate end, such that when silicone is injected into the mold cavity it forms a
layer 1 mm thick on all sides of the protruding substrate end. The resulting test strip is thus 94 mm long, with a rigid thermoplastic substrate piece on one end and silicone rubber on the other end. - The strength of the bond between the substrate material and silicone is measured by gripping the two ends of the test strip in the jaws of a mechanical tester such as an MTS Model 858 Material Test System (MTS Systems Corporation, Eden Prairie, Minn.), stretching it until the test strip breaks apart, and recording the force at which failure occurs. Examples of the force to failure are shown in Table 1. Examples 1 through 4 show that bond strengths greater than 300 N can be achieved with the appropriate combination of materials. For Comparative Examples C1 and C2, the silicone did not bond to the thermoplastic material.
-
Thermoplastic Average Force Example Silicone Substrate to Failure (N) 1 Shin-Etsu KE2095 60 RTP Nylon 6/6 136 2 Wacker 3070-60 RTP Nylon 6/6 303 3 Dow LC-70-2004 Zytel PA 174 4 Wacker 3070-60 Zytel PA 166 C1 Dow LC-70-2004 RTP Nylon 6/6 No bonding C2 Shin-Etsu KE2095 60 Zytel PA No bonding Dow LC-70-2004 silicone is produced by Dow Corning Corporation, Midland MI; RTP Nylon 6/6 is a polyamide produced by RTP Company, Winona, MN; Zytel PA is a polyamide produced by E.I. du Pont de Nemours, Wilmington, DE. - Thus, embodiments of the UNITARY RESPIRATOR WITH MOLDED THERMOSET ELASTOMERIC ELEMENTS are disclosed. One skilled in the art will appreciate that the present invention can be practiced with embodiments other than those disclosed. The disclosed embodiments are presented for purposes of illustration and not limitation, and the present invention is limited only by the claims that follow.
Claims (22)
1. A respiratory protection composite facepiece comprising:
a polymeric rigid facepiece body portion having a first surface and a second surface;
a silicone sealing facepiece element chemically bonded to at least one of the first surface or the second surface; and
a second silicone element chemically bonded to at least one of the first surface or the second surface.
2. A respiratory protection composite facepiece according to claim 1 , wherein the polymeric rigid facepiece body portion further comprises an inhalation valve or an exhalation valve and the second silicone element forms a diaphragm for the inhalation valve or the exhalation valve.
3. (canceled)
4. A respiratory protection composite facepiece according to claim 1 , wherein the polymeric rigid facepiece body portion further comprises a speaking port and the second silicone element forms a diaphragm for the speaking port.
5. A respiratory protection composite facepiece according to claim 1 , wherein the silicone sealing facepiece element is chemically bonded to the first surface and the second surface.
6. A respiratory protection composite facepiece according to claim 1 , wherein the polymeric rigid facepiece body portion comprises a plurality of apertures extending through the polymeric rigid facepiece body portion and the silicone sealing facepiece element interpenetrates at least a portion of the apertures.
7. A respiratory protection composite facepiece according to claim 1 , wherein the polymeric rigid facepiece body portion comprises a thermoplastic polymer and the silicone sealing facepiece element and the second silicone element is a thermoset polymer and the thermoset polymer chemically bonds directly onto the thermoplastic polymer.
8. A respiratory protection composite facepiece according to claim 1 , wherein the polymeric rigid facepiece body portion further comprises an inhalation valve and the second silicone element forms a gasket surrounding the inhalation valve.
9. A respiratory protection composite facepiece according to claim 1 , wherein the second silicone element forms at least a portion of one or more straps configured to secure the respiratory protection composite facepiece to a user's head.
10. A respiratory protection composite facepiece comprising:
a polymeric rigid facepiece body portion having a first surface and a second surface and a inhalation port;
a silicone sealing facepiece element chemically bonded to at least one of the first surface or the second surface and forming a gasket about the inhalation port.
11. A respiratory protection composite facepiece according to claim 10 , wherein the silicone sealing facepiece element is chemically bonded to the first surface and the second surface.
12. A respiratory protection composite facepiece according to claim 10 , wherein the polymeric rigid facepiece body portion comprises a plurality of apertures extending through the polymeric rigid facepiece body portion and the silicone sealing facepiece element interpenetrates at least a portion of the apertures.
13. A method of forming a respiratory protection composite facepiece comprising:
overmolding liquid silicone onto a polymeric rigid facepiece body portion having a first surface and a second surface, the liquid silicone in contact with at least one of the first surface or the second surface; and
solidifying the liquid silicone to form a silicone sealing facepiece element that chemically bonds to one of the first surface or the second surface, and a second silicone element chemically bonded to at least one of the first surface or the second surface, forming a respiratory protection composite facepiece.
14. A method according to claim 13 , wherein the polymeric rigid facepiece body portion further comprises an inhalation valve or an exhalation valve and the solidifying step forms a second silicone element diaphragm for the inhalation valve or the exhalation valve.
15. A method according to claim 13 , wherein the solidifying step solidifies the liquid silicone to form a silicone sealing facepiece element that chemically bonds to the first surface and the second surface.
16. A method according to claim 13 , wherein the polymeric rigid facepiece body portion comprises a plurality of apertures extending through the polymeric rigid facepiece body portion and the overmolding step interpenetrates liquid silicone into at least a portion of the apertures to form the silicone sealing facepiece element.
17. (canceled)
18. A method according to claim 13 , wherein the solidifying step second silicone element forms at least a portion of one or more straps configured to secure the respiratory protection composite facepiece to a user's head.
19. A method according to claim 14 , further comprising attaching a chemical or particulate filtration cartridge to the inhalation valve.
20. A method of forming a respiratory protection composite facepiece comprising:
overmolding liquid silicone onto a polymeric rigid facepiece body portion having a first surface and a second surface, the liquid silicone in contact with at least one of the first surface or the second surface; and
solidifying the liquid silicone to form a silicone sealing facepiece element that chemically bonds to one of the first surface or the second surface, and forming a gasket about the inhalation port.
21. A method according to claim 20 , wherein the solidifying step solidifies the liquid silicone to form a silicone sealing facepiece element that chemically bonds to the first surface and the second surface.
22. A method according to claim 20 , wherein the polymeric rigid facepiece body portion comprises a plurality of apertures extending through the polymeric rigid facepiece body portion and the overmolding step interpenetrates liquid silicone into at least a portion of the apertures to form the silicone sealing facepiece element.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/670,556 US20100218761A1 (en) | 2007-08-31 | 2008-07-15 | Unitary respirator with molded thermoset elastomeric elements |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US99974307P | 2007-08-31 | 2007-08-31 | |
US12/670,556 US20100218761A1 (en) | 2007-08-31 | 2008-07-15 | Unitary respirator with molded thermoset elastomeric elements |
PCT/US2008/070043 WO2009029349A1 (en) | 2007-08-31 | 2008-07-15 | Unitary respirator with molded thermoset elastomeric elements |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2008/070043 A-371-Of-International WO2009029349A1 (en) | 2007-08-31 | 2008-07-15 | Unitary respirator with molded thermoset elastomeric elements |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/573,301 Continuation US10065056B2 (en) | 2007-08-31 | 2014-12-17 | Unitary respirator with molded thermoset elastomeric elements |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100218761A1 true US20100218761A1 (en) | 2010-09-02 |
Family
ID=39809369
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/670,556 Abandoned US20100218761A1 (en) | 2007-08-31 | 2008-07-15 | Unitary respirator with molded thermoset elastomeric elements |
US14/573,301 Active 2030-06-29 US10065056B2 (en) | 2007-08-31 | 2014-12-17 | Unitary respirator with molded thermoset elastomeric elements |
US16/051,850 Active 2030-05-08 US11701528B2 (en) | 2007-08-31 | 2018-08-01 | Unitary respirator with molded thermoset elastomeric elements |
US18/328,016 Active US12070633B2 (en) | 2007-08-31 | 2023-06-02 | Unitary respirator with molded thermoset elastomeric elements |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/573,301 Active 2030-06-29 US10065056B2 (en) | 2007-08-31 | 2014-12-17 | Unitary respirator with molded thermoset elastomeric elements |
US16/051,850 Active 2030-05-08 US11701528B2 (en) | 2007-08-31 | 2018-08-01 | Unitary respirator with molded thermoset elastomeric elements |
US18/328,016 Active US12070633B2 (en) | 2007-08-31 | 2023-06-02 | Unitary respirator with molded thermoset elastomeric elements |
Country Status (11)
Country | Link |
---|---|
US (4) | US20100218761A1 (en) |
EP (2) | EP3398658B1 (en) |
JP (1) | JP2010537721A (en) |
KR (2) | KR101771333B1 (en) |
CN (1) | CN101784305B (en) |
AU (1) | AU2008293810B2 (en) |
BR (1) | BRPI0815244B8 (en) |
ES (1) | ES2682110T3 (en) |
PL (1) | PL2183031T3 (en) |
RU (1) | RU2437693C2 (en) |
WO (1) | WO2009029349A1 (en) |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100307506A1 (en) * | 2007-11-16 | 2010-12-09 | Detlef Kielow | Mask body for a respiratory half-mask |
US8613113B1 (en) * | 2009-02-25 | 2013-12-24 | Todd A. Resnick | Compact protective hood with vulcanized neck dam interface |
US20150047642A1 (en) * | 2012-04-30 | 2015-02-19 | Scott Technologies. Inc. | Half Facepiece |
US20150136142A1 (en) * | 2013-11-15 | 2015-05-21 | 3M Innovative Properties Company | Respirator With Floating Elastomeric Sleeve |
USD743536S1 (en) * | 2015-02-27 | 2015-11-17 | 3M Innovative Properties Company | Respirator mask having a circular button |
USD744088S1 (en) * | 2014-05-22 | 2015-11-24 | 3M Innovative Properties Company | Respirator mask having a circular button |
USD745962S1 (en) * | 2014-05-22 | 2015-12-22 | 3M Innovative Properties Company | Respirator filter retainer |
USD746438S1 (en) * | 2014-05-22 | 2015-12-29 | 3M Innovative Properties Company | Respirator filter cover |
USD757247S1 (en) * | 2014-05-22 | 2016-05-24 | 3M Innovative Properties Company | Respirator cartridge |
USD757928S1 (en) * | 2014-05-22 | 2016-05-31 | 3M Innovative Properties Company | Respirator cartridge body |
USD759807S1 (en) * | 2014-05-22 | 2016-06-21 | 3M Innovative Properties Company | Respirator mask exhalation port |
USD762845S1 (en) * | 2015-02-27 | 2016-08-02 | 3M Innovative Properties Company | Respirator cartridge |
USD763437S1 (en) * | 2015-02-27 | 2016-08-09 | 3M Innovative Properties Company | Respirator cartridge body |
USD767116S1 (en) * | 2015-02-27 | 2016-09-20 | 3M Innovative Properties Company | Respirator mask having an exhalation port |
US9517367B2 (en) | 2013-02-01 | 2016-12-13 | 3M Innovative Properties Company | Respiratory mask having a clean air inlet chamber |
USD778430S1 (en) * | 2013-11-15 | 2017-02-07 | 3M Innovative Properties Company | Filter cartridge |
US9700743B2 (en) | 2012-07-31 | 2017-07-11 | 3M Innovative Properties Company | Respiratory assembly including latching mechanism |
USD816209S1 (en) | 2016-03-28 | 2018-04-24 | 3M Innovative Properties Company | Respirator inlet port connection seal |
US9950202B2 (en) | 2013-02-01 | 2018-04-24 | 3M Innovative Properties Company | Respirator negative pressure fit check devices and methods |
USD827810S1 (en) | 2016-03-28 | 2018-09-04 | 3M Innovative Properties Company | Hardhat suspension adapter for half facepiece respirators |
US10065056B2 (en) | 2007-08-31 | 2018-09-04 | 3M Innovative Properties Company | Unitary respirator with molded thermoset elastomeric elements |
USD842982S1 (en) | 2016-03-28 | 2019-03-12 | 3M Innovative Properties Company | Hardhat suspension adapter for half facepiece respirators |
USD849239S1 (en) * | 2017-12-08 | 2019-05-21 | Louis M. Gerson Co., Ind. | Respirator mask |
US20200155878A1 (en) * | 2012-04-30 | 2020-05-21 | Scott Technologies, Inc. | Half facepiece |
US11020619B2 (en) | 2016-03-28 | 2021-06-01 | 3M Innovative Properties Company | Multiple chamber respirator sealing devices and methods |
US11052268B2 (en) | 2013-02-01 | 2021-07-06 | 3M Innovative Properties Company | Respirator negative pressure fit check devices and methods |
US20210379420A1 (en) * | 2020-06-05 | 2021-12-09 | The United States Of America As Represented By The Secretary Of Navy | Filtering face mask and respirator |
US11219787B2 (en) | 2016-03-28 | 2022-01-11 | 3M Innovative Properties Company | Respirator fit check sealing devices and methods |
US11254482B2 (en) * | 2018-05-04 | 2022-02-22 | Avon Polymer Products Limited | Filtration mask, packaged filtration mask, and tearable container |
USD1001271S1 (en) * | 2021-03-18 | 2023-10-10 | Tecmen Electronics Co., Ltd | Respirator |
USD1008450S1 (en) * | 2021-04-26 | 2023-12-19 | KEC-tech LTD | Mask |
US11992078B2 (en) | 2016-03-28 | 2024-05-28 | 3M Innovative Properties Company | Headwear suspension attachment element |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6579751B2 (en) * | 2011-08-01 | 2019-09-25 | スリーエム イノベイティブ プロパティズ カンパニー | Respiratory assembly with a latch mechanism |
GB201314886D0 (en) * | 2013-08-20 | 2013-10-02 | 3M Innovative Properties Co | Personal respiratory protection device |
GB201314887D0 (en) * | 2013-08-20 | 2013-10-02 | 3M Innovative Properties Co | Personal respiratory protection device |
GB201314885D0 (en) | 2013-08-20 | 2013-10-02 | 3M Innovative Properties Co | Personal respiratory protection device |
GB201314884D0 (en) | 2013-08-20 | 2013-10-02 | 3M Innovative Properties Co | Personal respiratory protection device |
US9603395B2 (en) | 2013-08-29 | 2017-03-28 | 3M Innovative Properties Company | Filtering face-piece respirator having darted mask body |
KR200489143Y1 (en) | 2014-01-17 | 2019-05-07 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Respiratory protection mask |
DE102014001938B4 (en) * | 2014-02-06 | 2015-10-22 | Moldex-Metric Ag & Co. Kg | Respirator with bayonet closure for a filter module |
AU362443S (en) * | 2015-01-14 | 2015-07-07 | Jsp Ltd | Respiratory mask component |
JP6502710B2 (en) * | 2015-03-19 | 2019-04-17 | 興研株式会社 | Protective mask |
JP2018531104A (en) | 2015-10-22 | 2018-10-25 | スコット テクノロジーズ インコーポレイテッドScott Technologies, Inc. | Respirator with voice transmission function |
WO2018052874A1 (en) | 2016-09-16 | 2018-03-22 | 3M Innovative Properties Company | Exhalation valve and respirator including same |
CN109663239A (en) * | 2017-10-15 | 2019-04-23 | 赣州卡迪瑞贸易有限公司 | Multifunctional face mask |
USD887553S1 (en) * | 2018-04-04 | 2020-06-16 | 3M Innovative Properties Company | Respirator filter |
US20210147677A1 (en) * | 2018-04-18 | 2021-05-20 | 3M Innovative Properties Company | Dual-Molded Polyamide-Silicone Composite Article and Methods of Making |
US11123583B2 (en) | 2018-04-19 | 2021-09-21 | Jackson Nestelroad | Emergency aircraft passenger oxygen respirator |
Citations (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4414973A (en) * | 1981-03-10 | 1983-11-15 | U.S.D. Corp. | Respirator face mask |
US4790306A (en) * | 1987-09-25 | 1988-12-13 | Minnesota Mining And Manufacturing Company | Respiratory mask having a rigid or semi-rigid, insert-molded filtration element and method of making |
US4886058A (en) * | 1988-05-17 | 1989-12-12 | Minnesota Mining And Manufacturing Company | Filter element |
US4910806A (en) * | 1989-05-01 | 1990-03-27 | Innovative Scuba Concepts, Inc. | Adjustable strap for use with a diver's face mask |
US5062431A (en) * | 1988-11-08 | 1991-11-05 | Health Research, Inc. | In vivo fluorescence photometer |
US5062421A (en) * | 1987-11-16 | 1991-11-05 | Minnesota Mining And Manufacturing Company | Respiratory mask having a soft, compliant facepiece and a thin, rigid insert and method of making |
US5095936A (en) * | 1989-03-16 | 1992-03-17 | Hutchinson | Bypass valve device, in particular for the fluid circuit associated with a heater |
US5325892A (en) * | 1992-05-29 | 1994-07-05 | Minnesota Mining And Manufacturing Company | Unidirectional fluid valve |
US5456027A (en) * | 1994-04-08 | 1995-10-10 | Vincent G. Tecchio | Athletic shoe with a detachable sole having an electronic breakaway system |
US5592937A (en) * | 1995-06-07 | 1997-01-14 | Mine Safety Appliances Company | Respirator mask with stiffening elements |
US5705275A (en) * | 1995-08-31 | 1998-01-06 | Shin-Etsu Polymer Co., Ltd. | Thermosetting resin composition and two-parts composite body thereof with silicone rubber |
US5720280A (en) * | 1995-05-03 | 1998-02-24 | Minnesota Mining And Manufacturing Company | Attenuator for use with respirators |
US6016804A (en) * | 1997-10-24 | 2000-01-25 | Scott Technologies, Inc. | Respiratory mask and method of making thereof |
US6176239B1 (en) * | 1997-08-06 | 2001-01-23 | The United States Of America As Represented By The Secretary Of The Army | Advanced chemical-biological mask |
US6216693B1 (en) * | 1995-01-20 | 2001-04-17 | 3M Innovative Properties Company | Respirator having a compressible press fir filter element |
US6298849B1 (en) * | 1999-10-14 | 2001-10-09 | Moldex-Metric, Inc. | Respirator mask with snap in filter cartridge |
US6298841B1 (en) * | 1995-06-19 | 2001-10-09 | Richard T. Cheng | Paintball gun and light emitting projectile-type ammunition for use therewith |
US20010035188A1 (en) * | 2000-04-17 | 2001-11-01 | Gleason Colin M. | Respiratory mask and service module |
US20020020416A1 (en) * | 2000-08-11 | 2002-02-21 | David Namey | Two-shot injection molded nasal/oral mask |
US20020094414A1 (en) * | 2001-01-17 | 2002-07-18 | Joachim Wagenblast | Composite structural article having a low internal stress |
US20020170563A1 (en) * | 1992-05-29 | 2002-11-21 | Japuntich Daniel A. | Filtering face mask that has a new exhalation valve |
US20020195109A1 (en) * | 2001-06-25 | 2002-12-26 | 3M Innovative Properties Company | Respirator valve |
US20030153934A1 (en) * | 2002-02-08 | 2003-08-14 | Scimed Life Systems, Inc. | Rapid exchange catheter and methods for delivery of vaso-occlusive devices |
US6629831B2 (en) * | 1999-04-16 | 2003-10-07 | Coach Wei | Apparatus for altering the physical properties of fluids |
US20040025880A1 (en) * | 2000-04-18 | 2004-02-12 | Andrew Capon | Self-sealing filter connection and gas mask filter assembly incorporating the same |
US6883518B2 (en) * | 2001-06-25 | 2005-04-26 | 3M Innovative Properties Company | Unidirectional respirator valve |
US20050109343A1 (en) * | 2003-11-21 | 2005-05-26 | 3M Innovative Properties Company | Respiratory facepiece and method of making a facepiece using separate molds |
US20060117469A1 (en) * | 2004-12-03 | 2006-06-08 | Giovanni Garofalo | Diving mask and method for the manufacture thereof |
US7117868B1 (en) * | 1992-05-29 | 2006-10-10 | 3M Innovative Properties Company | Fibrous filtration face mask having a new unidirectional fluid valve |
US20080133001A1 (en) * | 2006-12-04 | 2008-06-05 | Nicast Ltd. | Plastically deformable compositions and uses thereof |
US20090032024A1 (en) * | 2005-07-19 | 2009-02-05 | Map Medizin- Technologie Gmbh | Respiratory Mask and Method for Manufacturing a Respiratory Mask |
US8136973B2 (en) * | 2007-04-04 | 2012-03-20 | Lg Electronics Inc. | Lighting apparatus |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2108256A (en) * | 1936-05-13 | 1938-02-15 | Mine Safety Appliances Co | Breathing apparatus |
GB1360632A (en) | 1972-01-06 | 1974-07-17 | Roberts Ltd S F | Face masks |
US4308094A (en) * | 1977-02-02 | 1981-12-29 | Sanyo Electric Co., Ltd. | Diaphragm for speaker and method of producing same |
US4508936A (en) * | 1980-07-16 | 1985-04-02 | Gentex Corporation | Local external communication system |
US5235972A (en) * | 1991-08-12 | 1993-08-17 | Strong Michael A | Breathing mask apparatus |
GB2275614A (en) | 1993-03-03 | 1994-09-07 | Michael Beard | Seal for respiratory mask |
US5924420A (en) * | 1996-09-24 | 1999-07-20 | Minnesota Mining And Manufacturing Company | Full face respirator mask having integral connectors disposed in lens area |
US6105177A (en) * | 1997-12-26 | 2000-08-22 | Paulson Manufacturing Corp. | Protective goggles |
EP1471964B1 (en) * | 2002-02-04 | 2014-07-23 | Fisher & Paykel Healthcare Limited | Breathing assistance apparatus |
US20030168063A1 (en) | 2002-03-08 | 2003-09-11 | Gambone Anthony Joseph | Pressure face mask and nasal mask |
WO2005063327A1 (en) | 2003-12-31 | 2005-07-14 | Resmed Limited | Mask system |
US20050145249A1 (en) | 2003-12-31 | 2005-07-07 | Solyntjes Alan J. | Personal respiratory protection device that has a permanent or semi-permanent bayonet connection |
CN1846811A (en) * | 2005-04-12 | 2006-10-18 | 株式会社伍锐技术 | Multifunctional face cover |
WO2008011682A1 (en) * | 2006-07-28 | 2008-01-31 | Resmed Ltd | Delivery of respiratory therapy |
AU2008293825B2 (en) | 2007-08-31 | 2012-07-19 | 3M Innovative Properties Company | Respirator attachment component with molded thermoset elastomeric seal |
JP2010537721A (en) | 2007-08-31 | 2010-12-09 | スリーエム イノベイティブ プロパティズ カンパニー | Integrated respirator with molded thermoset elastomeric elements |
WO2009029363A1 (en) | 2007-08-31 | 2009-03-05 | 3M Innovative Properties Company | Respirator facepiece with thermoset elastomeric face seal |
-
2008
- 2008-07-15 JP JP2010522995A patent/JP2010537721A/en active Pending
- 2008-07-15 KR KR1020157017000A patent/KR101771333B1/en active IP Right Grant
- 2008-07-15 PL PL08781839T patent/PL2183031T3/en unknown
- 2008-07-15 RU RU2010106223/12A patent/RU2437693C2/en not_active IP Right Cessation
- 2008-07-15 US US12/670,556 patent/US20100218761A1/en not_active Abandoned
- 2008-07-15 KR KR1020107006792A patent/KR20100075459A/en active Search and Examination
- 2008-07-15 BR BRPI0815244A patent/BRPI0815244B8/en active IP Right Grant
- 2008-07-15 CN CN2008801037947A patent/CN101784305B/en active Active
- 2008-07-15 EP EP18173549.9A patent/EP3398658B1/en active Active
- 2008-07-15 EP EP08781839.9A patent/EP2183031B1/en active Active
- 2008-07-15 ES ES08781839.9T patent/ES2682110T3/en active Active
- 2008-07-15 WO PCT/US2008/070043 patent/WO2009029349A1/en active Application Filing
- 2008-07-15 AU AU2008293810A patent/AU2008293810B2/en not_active Ceased
-
2014
- 2014-12-17 US US14/573,301 patent/US10065056B2/en active Active
-
2018
- 2018-08-01 US US16/051,850 patent/US11701528B2/en active Active
-
2023
- 2023-06-02 US US18/328,016 patent/US12070633B2/en active Active
Patent Citations (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4414973A (en) * | 1981-03-10 | 1983-11-15 | U.S.D. Corp. | Respirator face mask |
US4790306A (en) * | 1987-09-25 | 1988-12-13 | Minnesota Mining And Manufacturing Company | Respiratory mask having a rigid or semi-rigid, insert-molded filtration element and method of making |
US5062421A (en) * | 1987-11-16 | 1991-11-05 | Minnesota Mining And Manufacturing Company | Respiratory mask having a soft, compliant facepiece and a thin, rigid insert and method of making |
US4886058A (en) * | 1988-05-17 | 1989-12-12 | Minnesota Mining And Manufacturing Company | Filter element |
US5062431A (en) * | 1988-11-08 | 1991-11-05 | Health Research, Inc. | In vivo fluorescence photometer |
US5095936A (en) * | 1989-03-16 | 1992-03-17 | Hutchinson | Bypass valve device, in particular for the fluid circuit associated with a heater |
US4910806A (en) * | 1989-05-01 | 1990-03-27 | Innovative Scuba Concepts, Inc. | Adjustable strap for use with a diver's face mask |
US5325892A (en) * | 1992-05-29 | 1994-07-05 | Minnesota Mining And Manufacturing Company | Unidirectional fluid valve |
US6843248B2 (en) * | 1992-05-29 | 2005-01-18 | 3M Innovative Properties Company | Filtering face mask that has a new exhalation valve |
US20030084902A1 (en) * | 1992-05-29 | 2003-05-08 | Daniel A. Japuntich | Unidirectional fluid valve |
US6854463B2 (en) * | 1992-05-29 | 2005-02-15 | 3M Innovative Properties Company | Filtering face mask that has a new exhalation valve |
US20020185133A1 (en) * | 1992-05-29 | 2002-12-12 | Japuntich Daniel A. | Filtering face mask that has a new exhalation valve |
US20020170563A1 (en) * | 1992-05-29 | 2002-11-21 | Japuntich Daniel A. | Filtering face mask that has a new exhalation valve |
US7117868B1 (en) * | 1992-05-29 | 2006-10-10 | 3M Innovative Properties Company | Fibrous filtration face mask having a new unidirectional fluid valve |
US20070119459A1 (en) * | 1992-05-29 | 2007-05-31 | 3M Innovative Properties Company | Method Of Making A Filtering Face Mask Having New Exhalation Valve |
US5456027A (en) * | 1994-04-08 | 1995-10-10 | Vincent G. Tecchio | Athletic shoe with a detachable sole having an electronic breakaway system |
US6216693B1 (en) * | 1995-01-20 | 2001-04-17 | 3M Innovative Properties Company | Respirator having a compressible press fir filter element |
US20010013347A1 (en) * | 1995-01-20 | 2001-08-16 | 3M Innovative Properties Company | Respirator having a compressible press fit filter element |
US5720280A (en) * | 1995-05-03 | 1998-02-24 | Minnesota Mining And Manufacturing Company | Attenuator for use with respirators |
US5592937A (en) * | 1995-06-07 | 1997-01-14 | Mine Safety Appliances Company | Respirator mask with stiffening elements |
US6298841B1 (en) * | 1995-06-19 | 2001-10-09 | Richard T. Cheng | Paintball gun and light emitting projectile-type ammunition for use therewith |
US5705275A (en) * | 1995-08-31 | 1998-01-06 | Shin-Etsu Polymer Co., Ltd. | Thermosetting resin composition and two-parts composite body thereof with silicone rubber |
US6176239B1 (en) * | 1997-08-06 | 2001-01-23 | The United States Of America As Represented By The Secretary Of The Army | Advanced chemical-biological mask |
US6016804A (en) * | 1997-10-24 | 2000-01-25 | Scott Technologies, Inc. | Respiratory mask and method of making thereof |
US6629831B2 (en) * | 1999-04-16 | 2003-10-07 | Coach Wei | Apparatus for altering the physical properties of fluids |
US6298849B1 (en) * | 1999-10-14 | 2001-10-09 | Moldex-Metric, Inc. | Respirator mask with snap in filter cartridge |
US20010035188A1 (en) * | 2000-04-17 | 2001-11-01 | Gleason Colin M. | Respiratory mask and service module |
US20040025880A1 (en) * | 2000-04-18 | 2004-02-12 | Andrew Capon | Self-sealing filter connection and gas mask filter assembly incorporating the same |
US20040149287A1 (en) * | 2000-08-11 | 2004-08-05 | David Namey | Two-shot injection molded nasal/oral mask |
US20020020416A1 (en) * | 2000-08-11 | 2002-02-21 | David Namey | Two-shot injection molded nasal/oral mask |
US20020094414A1 (en) * | 2001-01-17 | 2002-07-18 | Joachim Wagenblast | Composite structural article having a low internal stress |
US20020195109A1 (en) * | 2001-06-25 | 2002-12-26 | 3M Innovative Properties Company | Respirator valve |
US6883518B2 (en) * | 2001-06-25 | 2005-04-26 | 3M Innovative Properties Company | Unidirectional respirator valve |
US20030153934A1 (en) * | 2002-02-08 | 2003-08-14 | Scimed Life Systems, Inc. | Rapid exchange catheter and methods for delivery of vaso-occlusive devices |
US20050109343A1 (en) * | 2003-11-21 | 2005-05-26 | 3M Innovative Properties Company | Respiratory facepiece and method of making a facepiece using separate molds |
US20060117469A1 (en) * | 2004-12-03 | 2006-06-08 | Giovanni Garofalo | Diving mask and method for the manufacture thereof |
US20090032024A1 (en) * | 2005-07-19 | 2009-02-05 | Map Medizin- Technologie Gmbh | Respiratory Mask and Method for Manufacturing a Respiratory Mask |
US20080133001A1 (en) * | 2006-12-04 | 2008-06-05 | Nicast Ltd. | Plastically deformable compositions and uses thereof |
US8136973B2 (en) * | 2007-04-04 | 2012-03-20 | Lg Electronics Inc. | Lighting apparatus |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US12070633B2 (en) | 2007-08-31 | 2024-08-27 | 3M Innovative Properties Company | Unitary respirator with molded thermoset elastomeric elements |
US11701528B2 (en) | 2007-08-31 | 2023-07-18 | 3M Innovative Properties Company | Unitary respirator with molded thermoset elastomeric elements |
US10065056B2 (en) | 2007-08-31 | 2018-09-04 | 3M Innovative Properties Company | Unitary respirator with molded thermoset elastomeric elements |
US20100307506A1 (en) * | 2007-11-16 | 2010-12-09 | Detlef Kielow | Mask body for a respiratory half-mask |
AU2008323126B2 (en) * | 2007-11-16 | 2012-12-13 | Msa Europe Gmbh | Mask body for a respiratory half-mask |
US8613113B1 (en) * | 2009-02-25 | 2013-12-24 | Todd A. Resnick | Compact protective hood with vulcanized neck dam interface |
US20150047642A1 (en) * | 2012-04-30 | 2015-02-19 | Scott Technologies. Inc. | Half Facepiece |
US20200155878A1 (en) * | 2012-04-30 | 2020-05-21 | Scott Technologies, Inc. | Half facepiece |
US10744352B2 (en) * | 2012-04-30 | 2020-08-18 | Scott Technologies, Inc. | Half facepiece |
US9700743B2 (en) | 2012-07-31 | 2017-07-11 | 3M Innovative Properties Company | Respiratory assembly including latching mechanism |
US11052268B2 (en) | 2013-02-01 | 2021-07-06 | 3M Innovative Properties Company | Respirator negative pressure fit check devices and methods |
US9950202B2 (en) | 2013-02-01 | 2018-04-24 | 3M Innovative Properties Company | Respirator negative pressure fit check devices and methods |
US9517367B2 (en) | 2013-02-01 | 2016-12-13 | 3M Innovative Properties Company | Respiratory mask having a clean air inlet chamber |
US10786692B2 (en) | 2013-11-15 | 2020-09-29 | 3M Innovative Properties Company | Respirator with floating elastomeric sleeve |
US9814913B2 (en) * | 2013-11-15 | 2017-11-14 | 3M Innovative Properties Company | Respirator with floating elastomeric sleeve |
US11571591B2 (en) | 2013-11-15 | 2023-02-07 | 3M Innovative Properties Company | Respirator with floating elastomeric sleeve |
USD778430S1 (en) * | 2013-11-15 | 2017-02-07 | 3M Innovative Properties Company | Filter cartridge |
US20150136142A1 (en) * | 2013-11-15 | 2015-05-21 | 3M Innovative Properties Company | Respirator With Floating Elastomeric Sleeve |
USD757928S1 (en) * | 2014-05-22 | 2016-05-31 | 3M Innovative Properties Company | Respirator cartridge body |
USD744088S1 (en) * | 2014-05-22 | 2015-11-24 | 3M Innovative Properties Company | Respirator mask having a circular button |
USD745962S1 (en) * | 2014-05-22 | 2015-12-22 | 3M Innovative Properties Company | Respirator filter retainer |
USD746438S1 (en) * | 2014-05-22 | 2015-12-29 | 3M Innovative Properties Company | Respirator filter cover |
USD757247S1 (en) * | 2014-05-22 | 2016-05-24 | 3M Innovative Properties Company | Respirator cartridge |
USD759807S1 (en) * | 2014-05-22 | 2016-06-21 | 3M Innovative Properties Company | Respirator mask exhalation port |
USD762845S1 (en) * | 2015-02-27 | 2016-08-02 | 3M Innovative Properties Company | Respirator cartridge |
USD763437S1 (en) * | 2015-02-27 | 2016-08-09 | 3M Innovative Properties Company | Respirator cartridge body |
USD743536S1 (en) * | 2015-02-27 | 2015-11-17 | 3M Innovative Properties Company | Respirator mask having a circular button |
USD767116S1 (en) * | 2015-02-27 | 2016-09-20 | 3M Innovative Properties Company | Respirator mask having an exhalation port |
US11865375B2 (en) | 2016-03-28 | 2024-01-09 | 3M Innovative Properties Company | Respirator fit check sealing devices and methods |
USD842982S1 (en) | 2016-03-28 | 2019-03-12 | 3M Innovative Properties Company | Hardhat suspension adapter for half facepiece respirators |
US11020619B2 (en) | 2016-03-28 | 2021-06-01 | 3M Innovative Properties Company | Multiple chamber respirator sealing devices and methods |
USD827810S1 (en) | 2016-03-28 | 2018-09-04 | 3M Innovative Properties Company | Hardhat suspension adapter for half facepiece respirators |
US11219787B2 (en) | 2016-03-28 | 2022-01-11 | 3M Innovative Properties Company | Respirator fit check sealing devices and methods |
USD816209S1 (en) | 2016-03-28 | 2018-04-24 | 3M Innovative Properties Company | Respirator inlet port connection seal |
US11992078B2 (en) | 2016-03-28 | 2024-05-28 | 3M Innovative Properties Company | Headwear suspension attachment element |
USD849239S1 (en) * | 2017-12-08 | 2019-05-21 | Louis M. Gerson Co., Ind. | Respirator mask |
US11254482B2 (en) * | 2018-05-04 | 2022-02-22 | Avon Polymer Products Limited | Filtration mask, packaged filtration mask, and tearable container |
US20210379420A1 (en) * | 2020-06-05 | 2021-12-09 | The United States Of America As Represented By The Secretary Of Navy | Filtering face mask and respirator |
USD1001271S1 (en) * | 2021-03-18 | 2023-10-10 | Tecmen Electronics Co., Ltd | Respirator |
USD1008450S1 (en) * | 2021-04-26 | 2023-12-19 | KEC-tech LTD | Mask |
Also Published As
Publication number | Publication date |
---|---|
PL2183031T3 (en) | 2018-10-31 |
KR20100075459A (en) | 2010-07-02 |
EP3398658A1 (en) | 2018-11-07 |
KR20150082664A (en) | 2015-07-15 |
US10065056B2 (en) | 2018-09-04 |
CN101784305A (en) | 2010-07-21 |
RU2010106223A (en) | 2011-10-10 |
AU2008293810B2 (en) | 2011-10-06 |
JP2010537721A (en) | 2010-12-09 |
US12070633B2 (en) | 2024-08-27 |
CN101784305B (en) | 2013-10-23 |
US20150128936A1 (en) | 2015-05-14 |
EP3398658B1 (en) | 2021-01-20 |
RU2437693C2 (en) | 2011-12-27 |
ES2682110T3 (en) | 2018-09-18 |
BRPI0815244B1 (en) | 2018-11-06 |
WO2009029349A1 (en) | 2009-03-05 |
US20230321465A1 (en) | 2023-10-12 |
EP2183031A1 (en) | 2010-05-12 |
KR101771333B1 (en) | 2017-08-24 |
BRPI0815244B8 (en) | 2018-11-27 |
EP2183031B1 (en) | 2018-05-23 |
US11701528B2 (en) | 2023-07-18 |
US20180339178A1 (en) | 2018-11-29 |
BRPI0815244A2 (en) | 2015-06-30 |
AU2008293810A1 (en) | 2009-03-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US12070633B2 (en) | Unitary respirator with molded thermoset elastomeric elements | |
US8820326B2 (en) | Respirator facepiece with thermoset elastomeric face seal | |
US8839788B2 (en) | Respirator attachment component with molded thermoset elastomeric seal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: 3M INNOVATIVE PROPERTIES COMPANY, MINNESOTA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FLANNIGAN, PAUL J;HOOGENRAAD, JOHANNES;KNIVSLAND, DAVID P;SIGNING DATES FROM 20100120 TO 20100125;REEL/FRAME:023841/0848 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |