CN102019051A

CN102019051A - Filtering face respirator having grasping feature indicator

Info

Publication number: CN102019051A
Application number: CN 201010290493
Authority: CN
Inventors: 菲利普·D·艾茨曼; 迪安·R·达菲; 斯科特·A·斯普
Original assignee: 3M Innovative Properties Co
Current assignee: 3M Innovative Properties Co
Priority date: 2009-09-18
Filing date: 2010-09-20
Publication date: 2011-04-20
Also published as: MX2010010234A; RU2010138662A; JP2011092698A; BRPI1010461A2; EP2298096A2; KR20110031144A; AU2010224323A1

Abstract

A filtering, face-piece respirator 10 that has a harness 14, a mask body 12, and first and second flanges 30a, 30b. The mask body 12 comprises a filtering structure 16 and has a grasping feature such as first and second flanges 30a, 30b disposed on first and second mask body sides. First and second indicia 32a, 32b is placed on the first and second flanges 30a, 30b, respectively. The provision of indicia on a grasping feature of a respirator mask body is beneficial for informing the wearer of where to grasp the mask body for donning, doffing, and adjustment.

Description

Flat folding filtering face-piece respirator with grip features indicator

Technical field

The present invention relates to have the respirator that is positioned at the grip features on the mask body.Grip features comprises the mark that the indication that grasping mask body wherein wears, extracts or regulate is provided to the user.

Background technology

Respirator is worn on the top of people's respiration channel usually, is used at least one of two most common uses: (1) prevents that impurity or pollutant from entering wearer's respiratory tract; (2) protect other people or thing to make it not be exposed to pathogen and other pollutant of breathing out by the wearer.Under first kind of situation, in air, contain in the environment of the particle that the wearer is harmful to and wear respirator, for example in body of a motor car repair shop.Under second kind of situation, in the environment that other people or thing is existed pollution risk, wear respirator, for example in operating room or toilet.

The needs that the various respiratory device satisfies any one (or both) in these purposes have been designed.Some respirator is classified as " filtering face ", because mask body itself is as filter mechanism.The filter cylinder that is different from and can be attached (is reviewed patent RE39 referring to the U.S. that for example authorizes people such as Yuschak, 493) or inserts moulding filter core (referring to the United States Patent (USP) 4 of for example authorizing Braun, 790,306 and authorize the United States Patent (USP) 4 of Dolby, 098,306) use the respirator of rubber or elastomer face shield in combination, filtering face-piece respirator is designed to make filter medium to cover a big chunk of whole mask body, thereby need not install or change filter cylinder.These filtering face-piece respirators usually have one of following two kinds of structures: molded respirator and flat-fold respirator.

Molded filtering face-piece respirator comprises hot adhesion fibrous nonwoven webs (web) or open-work plastic wire usually, so that provide cup-shaped conformation to mask body.Molded respirator use with the storage life between tend to the shape that keeps identical.The patent example that discloses molded filtering face-piece respirator comprises following United States Patent (USP): 7,131,442 (authorizing people such as Kronzer), 6,923,182 and 6,041,782 (authorizing people such as Angadjivand), 4,850,347 (authorizing Skov), 4,807,619 (authorizing people such as Dyrud), 4,536,440 (authorizing Berg) and Des.285,374 (authorizing people such as Huber).

As its name suggests, flat-fold respirator can be folded into flat being used for transportation and storing, and can be launched into cup-shaped conformation in use.Authorize people's such as Bostock United States Patent (USP) 6,568,392 and 6,484,722 and the United States Patent (USP) 6,394,090 of authorizing Chen the example of flat-fold respirator is disclosed.

Before wearing respirator, respirator wearer is read and understood operation instruction is very important.If for example the user is unfamiliar with flat-fold respirator, then may cause controlling improperly, wearing and extract the mistake of respirator.This misguided use may cause equipping inappropriate and uncomfortable, and this may cause lacking to user's protection and may influence the cognition of user to respirator.

Some filtering face-piece respirators provide grip features to help the user and have worn and extract.Authorize Griesbach, people's such as III United States Patent (USP) 6,948,499 and 6,945,249 disclose the example of this filtering face-piece respirator.Though this respirator is provided with the grip features of " drawing loop " form, this grip features do not comprise can allow the user wear, extract and regulate respirator during know the mark of any kind of grasping face shield wherein.Therefore, grip features is not very obvious, therefore may not can be used by the wearer.Yet, as mentioned below, the invention provides a kind of user-friendly mode come quick identification wherein the grasping face shield to equip.

Summary of the invention

The invention provides a kind of novel filtering face-piece respirator, described respirator comprises (a) band tool and (b) mask body, have grip features on described mask body, described grip features has and is used to indicate the wearer's mark of the described mask body of grasping to equip wherein.

The inventor has been found that the mark that uses on the grip features all is useful for fitting tightly of realization and maintenance and wearer's face.Grip features provides solid surface, and the finger by this surface wearer is the grasping mask body easily, thus wear and subsequently adjustment and excision process in suitably locate mask body.Mark indication wearer grip features where be positioned at and during equipment operation this feature of grasping how, thereby can make things convenient for the wearer to give training.

Image (and non-legible) has become popular means from the information relevant with the operation of various products to the user that pass on day by day.A lot of images gain public acceptance.The intention of mark of the present invention is the following association of formation in the heart the user: the tram of controlling mask body when locating once more and extracing respirator on the respirator.Mark can present various forms, for example fingerprint pattern.Thereby fingerprint pattern can be combined in and form contrast or image in the combination of ultrasound material area in welding and non-welding region, and can wearer's finger tip can be felt by the mask layer thickness that changes in these zones.Yet, also can on grip features, print image, thereby allow to form more obvious vision contrast with the remainder of face shield.When mark be shaped as circular the time, by in grip features, cutting out crescent, perhaps even an aperture, can be effective, this hole or opening have following additional function: allow face shield to hang on nail or the hook so that store away from contaminated surface, perhaps even as the means of distribution.

Nomenclature

Hereinafter described term has the implication of following qualification:

" to dividing " means and is divided into two basic parts that equate;

" comprising " and mean its definition as the standard in the patent term, is usually and the open-ended term of " comprising ", " having " or " containing " synonym.Though " comprise ", " comprising ", " having " and " containing " and they be deformed into open-ended term commonly used, but the present invention also can use term than narrow sense (for example " and roughly by ... form ") suitably describe, be that the reason of semi open model term is that it only gets rid of those that play its expectation function aspect and may have the thing or the element of illeffects to the performance of respirator of the present invention than the term of narrow sense;

" clean air " the atmospheric environment air of certain volume of pollutant that meant filtering;

" pollutant " means particle (comprising dust, mist and smog) and/or can not be regarded as particle in general but may be suspended in airborne other material (as organic steam etc.);

" across dimension " is when from the top view respirator, the dimension of from left to right laterally extending on whole respirator;

" cup-shaped conformation " means the nose that can fully cover the people and any container shapes of oral area;

The gas that " exterior gas space " means exhalation is passing and is surpassing the ambient air space that enters behind mask body and/or the outlet valve;

" filtering face " means mask body itself and is designed to filter the air that passes it; Do not exist and be attached on the mask body or be molded as the filter cylinder that can independently discern or the inserts moulding filter core that mask body is realized this purpose;

" filter " or " filter course " means one or more breathable material layers, and this layer is applicable to the main application of removing pollutant (for example particle) from the air stream that passes it;

" filter medium " means ventilative structure, and this structure is designed to remove the airborne pollutant that passes it;

" filtration " means and comprises filter medium or filter course and the optional structure of other layer;

" first side " means and is positioned at perpendicular to across the mask body zone of dimension to plane one side of minute mask body;

" equipment " means and wears, extracts and regulate arbitrary action or the combination in the face shield body position;

" flange " means has the projecting part that is enough to by the surface area of people's grasping;

" pro " mean when the face shield main body is in folded state and extend away from mask body perimeter;

" band tool " means and helps mask body is bearing in structure or parts combination on wearer's the face;

" mark " means (one or more) distinguishing mark, (one or more) pattern, (one or more) image, (one or more) opening, (one or more) texture or their combination.

" with ... one " mean simultaneously and make together, promptly make as parts, rather than two independent parts of making that are bonded together subsequently;

" internal gas space " means the space between mask body and the human face;

" laterally " mean when the face shield main body is in folded state away from perpendicular to across dimension to the plane of minute mask body and extend;

" line of demarcation " means fold line, seam, bonding wire, tack line, suture, hinge and/or its any combination;

" mask body " means ventilative structure, and it is designed to be fitted in people's nose and oral area top, and helps to limit the internal gas space of separating with exterior gas space (comprise and fall seam portion and the binding part that its a plurality of layers or parts combine);

" nose clip " means following mechanical device (being different from nose foam), and this device is suitable for using on mask body, to improve the sealing around wearer's nose at least;

" periphery " means the outward flange of mask body, and when someone put on respirator, this outward flange generally will be provided with near wearer's face;

" pleat crape " means and is designed to from one's body or from the part that is folded back on one's body;

" polymer " and " plastics " means the material that mainly comprises one or more polymer and also can comprise other composition;

" a plurality of " mean two or more;

The air filter of the clean air that is provided for breathing for the wearer that " respirator " means that the people wears;

" second side " means and is positioned at perpendicular to across the mask body zone (second side with first side relative) of dimension to plane one side of minute mask body;

" stickiness closely " or " closely fit " means (between mask body and wearer's face) airtight basically (or not leaking substantially) applying is provided;

" draw loop " and mean and show parts with the enough surface areas that are used for attached another parts; And

" horizontal expansion " means basically and extends on across dimension.

Description of drawings

Front perspective view when Fig. 1 goes up for filtering face-piece respirator 10 according to the present invention is worn on the human face;

Fig. 2 is the vertical view of respirator 10 shown in Figure 1;

Fig. 3 is a zoomed-in view;

Fig. 4 is the cutaway view along the mask body 12 of the line 4-4 intercepting of Fig. 2; And

Fig. 5 is the cutaway view along the filtration 16 of the line 5-5 intercepting of Fig. 4.

The specific embodiment

When enforcement is of the present invention, provide a kind of mask body to be provided with the filtering face-piece respirator of grip features.Grip features is provided with mark, is to be designed for the user to carry out grasping during equipping thereby the user can easily understand this feature.This grip features can be included in the deployment configuration from mask body laterally and first flange and second flange that pro extend.First flange and second flange provide " handle part " of each side that is positioned at mask body, thereby make the wearer suitably locate mask body in the trial employment period.The wearer does not need to pinch the state that mask body changes face shield into expectation fits with face.Like this, flange provides the very simple means that are used to realize the face shield adjusting.Mark is used to allow the user know that the flange person of being to use is at the position of wearing, excision and conditioning period should grasping.

Fig. 1 illustrates the example of flat folding filtering face-piece respirator 10 that can be used for providing to the wearer breathe air of cleaning according to the present invention.As shown in the figure, filtering face-piece respirator 10 comprises mask body 12 and band tool 14.Mask body 12 has filtration 16, and inhaled air must see through this structure before entering wearer's respiratory system.Filtration 16 removes the pollutant from surrounding environment, thereby the wearer breathes the air of cleaning.Mask body 12 comprises top 18 and bottom 20.Top 18 and bottom 20 are separated by line of demarcation 22.In this specific embodiment, line of demarcation 22 is the pleat crapes in the horizontal expansion of the middle part of whole mask body.Mask body 12 also comprises the periphery with upper curtate 24a and lower curtate 24b.Be with tool 14 to have and be fixed to the belt 26 that draws loop 28a with staple.As shown in the figure, drawing loop 28a is the integral part of flange 30a.

Fig. 2 illustrates, and respirator 10 can have the first flange 30a and the second flange 30b of the relative both sides that are positioned at mask body 12.Belt 26 usefulness for example staple are fixed to each and draw loop 28a and

28b.Flange

30a and 30b laterally and pro stretch out and so provide grip features for the user from mask body.Each flange laterally stretches out from mask body, this be because flange away from directions X, the plane P of minute mask body being extended.

Flange

30a and 30b also pro extend from mask body 12, and this is because flange extends towards the leading edge 22 (direction shown in arrow y) of mask body 12 away from peripheral 24a.The surface area that each flange accounts for typically is about 1 to 15 square centimeter of (cm ²), be more typically about 2 to 12 square centimeters, even be more typically about 5 to 10 square centimeters.In addition, flange extends typically at least 2 millimeters (mm) away from mask body, more typically is 5mm at least, even more typically is at least 1 to 2 centimetre (cm).Flange 30a, 30b can be integratedly or non-ly are arranged on the mask body integratedly, and can comprise one or more or whole in a plurality of layers that constitute mask body.That is to say that flange can be the extension of the material that is used to prepare mask body, or can be made by independent material (for example rigidity or semirigid plastic).Flange 30a, 30b have mark 32a, the 32b on the one or more sides that are positioned at flange respectively.As shown in the figure,

mark

32a, 32b can be the form of fingerprint, allow the user know can be between user's relative finger (for example thumb and forefinger) the grasping mask body where.This mark can present different shape and form, for example circular concentric, ellipse or rectangle.As selection, mark can comprise the hole that is arranged in flange, thereby the wearer can experience its contact between finger relatively.

Fig. 3 illustrates the example in the hole 33 that can be arranged among the mark 32b.Mark can be formed by welded pattern, printing image, one or more opening, (one or more) joint-cutting, perforation, adhesive part or above-mentioned every combination.The surface area that mark accounts for typically is about 1 to 6 square centimeter of (cm ²), be more typically about 2 to 4 square centimeters.Although other objects such as for example printing ink can be added on the surface of mask body and form mark, mark is exclusively integrally formed by the material of mask body itself typically, for example forms welded pattern.Mark can be an obvious visible welded pattern on the corresponding main surfaces of each flange, that is to say, the thickness that weld seam passes flange extends.Correspondingly, each layer that constitutes mask body can weld together, thereby makes that from the end face or the bottom surface welded pattern of grip features be obviously visible.The flange of one can have setting additive welds or binding part 34 thereon, to increase flange stiffness.As selection, can between a plurality of layers, use adhesive phase to increase flange stiffness.Use hereinafter described " flexible rigidity test ", when along the first type surface bending of flange, the flexural modulus of flange can be at least 10 MPas (Mpa), more typically 20Mpa at least.At upper end, flexural modulus is typically less than 100MPa, more typically less than 60MPa.These flexural modulus (promptly in top and bottom both place) are for big in the about twice when sample edge is tested.Can use the method I " Three Point Bend Testing (three-point bending test) " of improved ASTM D790 method " Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials (not enhancing and reinforced plastics and electrically insulating material flexural property) " to measure flange stiffness.Flexural modulus can be calculated in the range of linearity of stress-strain figure line according to ASTM D790.Though loop 28a and the 28b of drawing shown in Figure 2 has common edge as a peripheral section 24a part, when face shield being placed as shown in Figure 1 on wearer's the face, draw loop can extend beyond the peripheral part of mask body perimeter and facial contact.With the periphery of facial contact generally be positioned at bracketed regional 35, because of rather than a part of drawing the loop periphery.Mask body perimeter can have a series of binding parts or weld part 34 ', combine with a plurality of layers mask body 12.Can also tack line 36 be set at

flange

30a, 30b and filtration 16 crossing parts.Top 18 can comprise at least one pleat crape 38, and this pleat crape extends to second side of mask body from first side of mask body.The example of other grip features except the one flange comprises: add other elements that are additional to mask body, for example fin, ring and post etc., and can comprise: the injection molding member made, the cross cutting parts of making by plastics, metal and/or cellulosic material, the mechanical grip device, the attached device of making by plastics, metal and/or cellulosic material of employing adhesive, and adopt the attached device of mechanical system such as the rivet that in attach procedure, is out of shape etc.Denomination of invention is applicable to the filtering face-piece respirator of use flange of the present invention as grip features for the U.S. Patent application 12/338,084 of " Flat Fold Respirator Having Flanges Disposed On The Mask Body (the flat folding respirator with the flange that is arranged on the mask body) " discloses.

Fig. 4 illustrates the example of the pleat crape structure of the horizontal flat folding mask body 12 that can be used for the present invention.As shown in the figure, mask body 12 comprises

pleat crape

22 and 38, above is described with reference to Fig. 1 and 2.The top of mask body 12 or top panel 18 also comprise pleat crape 40.The bottom of mask body 12 or lower panel 20 comprise

pleat crape

42,44,46,48,50 and 52.The bottom 20 of mask body 12 can comprise the filter medium surface area bigger than top 18.Mask body 12 also comprises the peripheral fleece 54 that is fixed to mask body along its periphery.Nose clip 56 can medially be arranged on the top 18 of mask body, and and filtration 16 and peripheral fleece 54 between peripheral adjacent.Nose clip 56 can be made by flexible metal or plastics, and can be by the manual profile of adjusting with applying wearer's nose of wearer.The periphery fleece 54 can peripheral 24a, 24b place fold into mask body above.Periphery fleece 54 also can be the also extension of fixing interior covering fleece 58 of edge fold around peripheral 24a and 24b.As selection, peripheral fleece can be the outer extension that covers fleece 60.As shown in the figure, when face shield main body 12 was in folded state, top 18 seemed as playing the panel of pleat; Similarly, when face shield was in storing state after folding, bottom 20 (Fig. 1) seemed as playing the panel of pleat.When providing, can use than pleat crape more or less shown in the figure according to flat folding filtering face-piece respirator of the present invention.

Fig. 5 shows that filtration 16 can comprise one or more fibrous material layers, covers fleece 58 in for example, covers fleece 60 and filter course 62 outward.Cover fleece 58 and the outer fleece 60 that covers in can providing with protection filter course 62, thereby and avoid the fiber of the filter course 62 loose facepiece interior that enters that becomes.During using respirator, air passed

layer

60,62 and 58 successively before entering facepiece interior.Then, the wearer can suck the air in the facepiece interior gas compartment.When the wearer exhaled, air passed

layer

58,62 and 60 in the opposite direction successively.Perhaps, the outlet valve (not shown) can be set on mask body, the gas compartment blows out to enter exterior gas space to allow to exhale rapidly internally, makes through the air of filtration 16 minimum.Usually, cover

fleece

58 and 60 and made by the selected non-woven material with comfort, especially the side in filtration and wearer's facial contact has comfort.Can will be described in more detail below in conjunction with various filter courses and the fibroreticulate structure of covering that supporting structure of the present invention uses.In order to improve wearer's degree of applying and comfort level, elastomer face seals can be fixed to the periphery of filtration 16.When putting on respirator, this type of face seal can extend internally with contact wearer's face from peripheral radial.The example of face seal at the United States Patent (USP) 6,568,392 of authorizing people such as Bostock, authorize people's such as Springett United States Patent (USP) 5,617,849, authorize people's such as Maryyanek United States Patent (USP) 4,600,002 and authorize in the Canadian Patent 1,296,487 of Yard and describe to some extent.Filtration can also have with layer in 58,60 and 62 at least one or many persons and the structure of putting (also putting with outer fleece 60 outer surfaces that cover usually) knot or the net sheet.The use of this type of net sheet is the U.S. Patent application No.12/338 of " Expandable Face Mask with Reinforcing Netting (having the extensible face shield that adds consolidated web) " in denomination of invention, describes to some extent in 091.

The filtration that uses in conjunction with the present invention can adopt multiple different shape and structure.In general, the shape of filtration and structure are corresponding to the general shape of mask body.Although the filtration that illustrates has the filter course of comprising and two fibroreticulate a plurality of layers of covering, filtration can just comprise the combination of filter course or filter course.For example, can the pre-filtering layer be set in the upstream of more selected downstream filter layer.In addition, the material (for example active carbon) of adsorptivity can be arranged between the fiber and/or a plurality of layer with filtration.The layer of independent particle filter course in conjunction with adsorptivity can also be used, thereby realization is to the filtration of particle and steam.Filtration can comprise one or more enhancement Layers that help to provide this cup-shaped conformation.Filtration also can have one or more level and/or the vertical line of demarcation that helps its structural intergrity.

The filtration that uses in the mask body of the present invention can be granule capturing type filter or gas and vapor type structure of filter.Filtration also can be to prevent that liquid from transferring to the barrier layer of opposite side from a side of filter course, for example to prevent liquid aersol or liquid splash thing (as blood) permeatable filter layer.According to application demand, can use the similar or not similar filter medium of multilayer to construct filtration of the present invention.The filter that can be in layered mask body of the present invention advantageously uses is under low pressure drop (for example in pressure drop under the face velocity of 13.8 cels less than about 195 to the 295 Pascals) state, so that the respiratory work amount of face mask wearer minimizes in general.In addition, filter course can for flexibility and can have enough shearing strengths, thereby they the expection service condition under generally all can keep its structure.The example of granule capturing type filter comprises one or more tiny inorfils (for example glass fibre) net or polymer synthetic fiber net.Plastic wire can comprise by for example molten polymer-type microfibre that the electret charged that technology makes such as blows.The polyolefin microfibre that is formed by the polypropylene that has charged especially can be used for the granule capturing application.The filter course that substitutes can have the absorbent component that is used for removing from breathe air harmfulness or gas with foreign flavor.Adsorbent can comprise by bonding agent, binding agent or fibre structure and is defined in powder or particle in the filter course.Referring to the United States Patent (USP) 6,334,671 of authorizing people such as Springett and the United States Patent (USP) 3,971,373 of authorizing Braun.Adsorbent layer can form by coated substrate (for example fiber or reticulated polymer foam), to form thin adhesion layer.Sorbent material can comprise process or not pass through chemically treated active carbon, Woelm Alumina-SiO 2 catalyst substrate and alumina particle.The example that can be adapted to the adsorptivity filtration in the multiple structure is described in the United States Patent (USP) 6,391,429 of authorizing people such as Senkus to some extent.

Usually filter course is selected to realize required filter effect.In general, filter course will remove particle and/or other pollutant of high percentage from pass air-flow wherein.For fibrous filter layer, select fiber according to the substance classes that will filter out, thereby and select in molded operation them can not become to fiber usually to be bonded together.As noted, filter course can multiple shape and form occur, and thickness typically is about 0.2 millimeter (mm) to 10mm, is more typically about 0.3mm to 5mm, and it can be the fleece of general plane, thereby the surface area that can obtain stretching for corrugated maybe, for example referring to the United States Patent (USP) 5,804,295 and 5 of authorizing people such as Braun, 656,368.Filter course can also comprise a plurality of filter courses that are bonded together by adhesive or any other method.Roughly any suitable material that known (or exploitation from now on) is used to form filter course can be used as filtering material.The melt blown fiber net, for example at the Superfine Thermoplastic of Wente, Van A. Fibers, 48 Indus.Engn.Chem. (superfine thermoplastic fibres, the 48th volume, industry and engineering chemistry), described in the 1342nd page and continued page etc. (1956), be especially available so that forever the form of charged (electret) exists particularly (for example referring to the U.S. Patent No. 4 of authorizing people such as Kubik, 215,682).These meltblown fibers can be the microfibre (be called " blowing microfibre ", be called for short BMF) of effective fiber diameter less than about 20 microns (μ m), are generally the microfibre of about 1 to 12 μ m.Can be according to Davies, C.N., The Separation Of Airborne Dust Particles, Institution Of Mechanical Engineers, London, Proceedings 1B, 1952 (Davies, C.N., the separation of empty floating dust grain, The Institution of Mechanical Engineers (London), collection of thesis 1B, nineteen fifty-two) determine effective fibre diameter.Particularly preferably be the BMF net that comprises by polypropylene, poly-(4-methyl-1-pentene) and the fiber that is combined to form thereof.As U.S. review patent RE31 at van Turnhout, the fiber of the fibriilar film of charged formation of instruction also is suitable in 285, and the above-mentioned net of rosin-fiber fleece web and glass fiber mesh or solution blowing net or electrostatic spraying fleece, particularly mems thin film form also is suitable getting.As authorize people such as Eitzman United States Patent (USP) 6,824,718, authorize people's such as Angadjivand United States Patent (USP) 6,783,574, authorize people's such as Insley United States Patent (USP) 6,743,464, authorize people's such as Eitzman United States Patent (USP) 6,454,986 and 6,406,657 and the United States Patent (USP) 6,375 of authorizing people such as Angadjivand, 886 and 5,496,507 is disclosed such, can allow fiber contact water give fiber with electric charge.Can be disclosed like that by corona chargings as the United States Patent (USP) 4,588,537 of authorizing people such as Klasse, or as to authorize the United States Patent (USP) 4,798,850 of Brown disclosed like that by triboelectric charging, give fiber with electric charge.In addition, in fiber, can comprise additive, to strengthen the fibroreticulate strainability made by the water mise-a-la-masse method (referring to the United States Patent (USP) 5,908,598 of authorizing people such as Rousseau).Especially, fluorine atom can be arranged on the fiber surface place in the filter course, to improve the strainability in the mist of oil environment, referring to the United States Patent (USP) 6,398 of authorizing people such as Jones, 847B1,6,397,458B1 and 6,409,806B1.The common basic weight of electret BMF filter course be about 10 to 100 the gram/square metre.According to for example authorize people such as Angadjivand ' technology described in 507 patents charges, and as in the patent of authorizing people such as Jones, mention comprise fluorine atom the time, basic weight can be respectively about 20 to 40g/m ²With about 10 to 30g/m ²

Cover the smooth surface that fleece obtains being used to contacting wearer's face in can using, and can use the outer fleece that covers to collect the loose fiber in the mask body or obtain aesthetic.Though cover fleece does not provide any essence usually to filtration useful filter effect, can serve as prefilter when the outside that is arranged on filter course (or upstream).In order to obtain the comfort level of appropriate level, interior covering fleece typically has less relatively basic weight, and is formed by tiny relatively fiber.More particularly, can fashion into and have about 5 covering fleece to 50g/m ²(typically be 10 to 30g/m ²) basic weight, and the fiber diameter of the fiber that often uses typically is about 7 microns to 18 microns for being about 5 microns to 24 microns, is more typically about 8 microns to 12 microns.Be used to cover fibroreticulate suitable material and can be blowing microfibre (BMF) material, particularly polyolefin BMF material, for example polypropylene BMF material (comprise polypropylene blend, also comprise polypropylene and poly blend) and spun-bonded fibre.The covering fleece that uses among the present invention preferably has the fiber that stretches out from web surface seldom after handling, so has the smooth exterior surface face.The United States Patent (USP) 6 that the fibroreticulate example of the covering that can use is in the present invention for example being authorized Angadjivand, 041,782, authorizing people's such as Bostock United States Patent (USP) 6,123,077 and authorizing has disclosed among people's such as Bostock the international monopoly WO96/28216A.

Used belt can be made of a variety of materials in the band tool, for example thermoset rubber, thermoplastic elastomer (TPE), braiding or knitting yarn/building rubber compound, the non-resilient branch or the like that is woven into.Belt can be made by elastomeric material, for example the elasticity braided material.Belt preferably is extensible to the twice greater than its total length, and can recover its relaxed state.Belt also can rise to three times or four times of its relaxed state length, can return to its original state and can any damage not arranged to it when tension force removes.Two times, three times or four times of length when therefore, elastic limit preferably is not less than belt and is in its relaxed state.Usually, belt is about 20 to 30cm, wide about 3 to 10mm, thick about 0.9 to 1.5mm.Belt can be used as continuous belt and draws loop to extend to second from first to draw loop, or belt can have a plurality of parts, and available other fastener of these parts or clasp further are bonded together.For example, belt can have first and the second portion that is bonded together by fastener, and when when face removes mask body, the wearer can untie fastener rapidly.The example of the belt that can use in conjunction with the present invention is shown in the United States Patent (USP) 6,332,465 of authorizing people such as Xue.The example that can be used for the fastening or fastening mechanism that the one or more parts with belt are bonded together is at the United States Patent (USP) 6 of for example authorizing people such as Brostrom, 062,221, authorize the United States Patent (USP) 5 of Seppala, 237,986 and the United States Patent (USP) EP1 that authorizes Chien, 495, shown in the 785A1.

Outlet valve can be attached on the mask body, so that remove the air of gas compartment exhalation internally.By removing the damp-heat air of breathing out rapidly, use outlet valve can improve wearer's comfort level from facepiece interior.For example referring to the United States Patent (USP) 7,188,622,7,028,689 and 7,013 of authorizing people such as Martin, 895; Authorize people's such as Japuntich United States Patent (USP) 7,428,903,7,311,104,7,117,868,6,854,463,6,843,248 and 5,325,892; Authorize people's such as Mittelstadt United States Patent (USP) 6,883,518; And the U.S. review patent RE37 that authorizes Bowers, 974.Any basically outlet valve that suitable pressure drop is provided and can suitably be fixed on the mask body can use in conjunction with the present invention, promptly will arrive exterior gas space from the exhalation air delivery of internal gas space.

The nose clip that uses in conjunction with the present invention roughly can be for helping to improve any extra parts of the stickiness above wearer's nose.Because the profile to wearer's face has significant change in this zone, nose clip can help mask body to realize good applying better in this position.Nose clip can comprise for example pliable and tough dead-soft metal (as aluminium) band, and it can be configured as and make face shield reach nose and the required applying relation of cheek intersection maintenance above wearer's nose.The example of suitable nose clip is at the United States Patent (USP) 5,558,089 and the Des.412 that authorize Castiglione, shown in 573.Other nose clips are described in U.S. Patent application 12/238,737 (being filed on September 26th, 2008), U.S. Patent Publication 2007-0044803A1 (being filed on August 25th, 2005) and 2007-0068529A1 (being filed on September 27th, 2005) to some extent.

Although described the present invention in conjunction with some flat folding face shield, but the present invention can be used in combination with the flat folding face shield with other structures, for example at the United States Patent (USP) 7 of authorizing people such as Bostock, 069,930 and authorize the United States Patent (USP) 6 of Chen, 394, face shield described in 090, perhaps the present invention can be used in combination with molded face shield, for example referring to United States Patent (USP): 7,131,442 (authorizing people such as Kronzer), 6,923,182 (authorizing people such as Angadjivand) and 6,827,764 (authorizing people such as Springett).The present invention can also be used in combination with above-mentioned molded face shield.

Example

The respirator filtration is formed by three layers of non-woven material and other respirator parts.Face shield of the present invention is preparation of assembling-preformed member and face shield arrangement in twice operation.The preformed member preparatory phase comprises laminated and the fixing step of non-woven webs, formation pleat crape broken line and attached all not care about one's appearance material materials and nose clip.The face shield housekeeping operation comprises along the folding pleat crape of the broken line of impression, merges lateral face shroud rim and reinforcement flange material, will draw loop to cut into net shape and attached headband.

The body of respirator is formed by following three layers of non-woven material: cover fleece (205mm * 300mm), filtering material (205mm * 300mm) and interior covering fleece (238mm * 300mm) outward.Outer covering fleece and interior covering fleece are 34g/m ²(gsm) polypropylene spun-bonded non-woven fabric.The filtering material that uses in mask body is basic weight 59gsm, packing 6% and the effective electret blowing microfibre polypropylene net of the charging of 7.5 microns of fiber sizes.

Respirator body forms by laminated each layer, uses spot gluing pattern ultra-sonic welded then together.Use derive from Branson (Danbury, 2000 type ultrasonic welding systems Connecticut) are finished ultra-sonic welded, the stamping press of welding equipment is 483 kPas (kPa), horn amplitude, frequency and dwell time be respectively 100%, 20kHz and 0.6 second.Against the anvil operation with the square bolt of flat-top, wherein each bolt all has 1.6 square millimeters the surface area that is arranged to lattice, and the bolt center distance is about 1 centimetre.The plane soldering tip of welding machine is operated against anvil with the contact pressure of about 6MPa.After fixing non-woven layer, on fixing non-woven layer, impress out the broken line of qualification pleat crape position.Employing derives from USM Corporation, and (15 tons of flush shear forces use cutting die for Haverhill, Type B Hytronic Cutting Machine bicker impression broken line Massachusetts).Cutting die has the bar of nine band arc edges, and these cross the length of preformed member, forms lines in the time of in being pressed into preformed member in non-woven layer.The lines of impression force together fleece at the contact point place, and can not penetrate or obvious alloying material.

As the final step in the preformed member preparation manipulation, with the fibroreticulate extension of interior covering edge be wrapped in the edge of preformed member and edge around and be ultrasonically welded to suitable position.Use derive from Branson (Danbury, 2000X type ultrasonic welding system Connecticut) carries out ultra-sonic welded, the stamping press of welding equipment is 448kPa, horn amplitude, frequency and dwell time be respectively 100%, 20kHz and 0.5 second.Against surface area contacted anvil operation, use the punching press and the soldering tip condition of regulation, to produce the contact pressure of 8.5MPa, with the material of bonding preformed member with 4.1 square centimeters.Be used to the to bond zone of anvil of periphery edge of preformed member is constructed to the square bolt of flat-top, wherein each bolt all have be arranged to pattern 34 shown in Figure 2 ' 1.6 square millimeters surface area.The face bonding head rest of welding machine the anvil operation, thereby peripheral fleece is fixed on the preformed member.Utilize this method that nose clip is attached to the top of preformed member, and nose clip is encapsulated in outer the covering between fleece and the fibroreticulate folded edge of interior covering.Nose clip is the aluminium strip with ductile, plastically deformable of shape shown in Figure 2, long 9cm, wide 0.5cm, thick 1mm.

In the face shield housekeeping operation, along the folding pleat crape of broken line shown in Figure 4.The folding pleat crape that is positioned at face shield centre fold top makes that outside pleat crape faces down when face shield is opened, finishes this operation and gathers bulk matter when helping inhibition to wear face shield in the face shield broken line.After the suitably folding preformed member around centre fold, the ultra-sonic welded preformed member comprises the tack coat of the reinforcement flange of grasping mark (32a of Fig. 2 and 32b) with fusion face shield lateral edge (28a of Fig. 2 and 28b) and formation.Use derives from the 2000x type ultrasonic welding system of Branson and finishes ultra-sonic welded, and the stamping press of welding equipment is 483kPa, and horn amplitude, frequency and dwell time be respectively 100%, 20kHz and 0.8 second.Be used for being configured to the square bolt of flat-top in conjunction with the contact area of the anvil of flange material, each bolt all has 1.04 square millimeters surface area, and the spacing of being separated by with its planar side is 2.88 millimeters, and comprises the shape of the described mark of claims.Gained in conjunction with pattern shown in the 30a of Fig. 2.Form long 95.25 millimeters of the anvil bar of the lateral edge bond of face shield, wide 9.525 millimeters, gained in conjunction with pattern as Fig. 2 36 shown in.The face bonding head rest of welding machine the anvil operation, thus the mark welded pattern of formation shown in Fig. 2 and 3 and the tack coat of generation flange.Angled element of anvil sealed the lateral edge of face shield, and peg welding melt surface has also been reinforced flange material.As the final step in the face shield housekeeping operation, the flange of reinforcing cut into required form and headband is fixed to staple and draw loop.The wide 1.0cm of flange, long 5.0cm, and have the head of the radius 0.5cm that draws loop point place that is positioned at attached headband.Use derives from the P6C-8 type hand-held stapler of Stanley Bostitch (East Greenwich, Rhode Island) and the zinc-plated staple of No.STH50191/4 inch and headband is attached to draws loop circular arc head.Method according to regulation in " flexible rigidity test (Stiffness inFlexure Test) " is tested from face shield cutting flange segments.On two orientations, test flange segments: along the sample plane surface with along sample edge (for flange, along length orientation).During along the bending of sample plane surface, flexural modulus is 27MPa.When sample edge is tested, flexural modulus is 66MPa.The wide 7.9mm of headband, thick 0.8mm can derive from Providence Braid Co. (Pawtucket, Rhode Island) by sample number into spectrum No.125-1.Flange can rotate around the axis parallel with the attachment wire of mask body, and can form the mask body that has more rigidity when opening and put on face shield.As indicating the indicator of grasping mask body wherein, the mark that is arranged on the flange is in sight easily.

Under the premise without departing from the spirit and scope of the present invention, can carry out various modifications and change to the present invention.Therefore, the present invention is not limited to foregoing, but only is subjected to the restriction that following claims and any equivalent thereof are mentioned.

The present invention also can not exist this paper suitably not implement under the situation of specifically described any element.

All patents cited above and patent application are included in the background technology part those, and the mode that all calls by reference is in full incorporated this paper into.Conflict or during difference, state specification more than answering and be as the criterion when existing between the disclosure in the file that these are incorporated into and the above-mentioned specification.

Claims

1. filtering face-piece respirator comprises:

(a) band tool;

(b) mask body has grip features on described mask body, described grip features has and is used to indicate the wearer's mark of the described mask body of grasping to equip wherein.

2. filtering face-piece respirator according to claim 1, wherein,

Described grip features comprises flange.

3. filtering face-piece respirator according to claim 2, wherein,

Described grip features comprises first flange and second flange of the relative both sides that are positioned at described mask body.

4. filtering face-piece respirator according to claim 3, wherein,

Described mark comprises at least one notch portion that lays respectively on described first flange and described second flange.

5. filtering face-piece respirator according to claim 3, wherein,

Described mark comprises first sealing wire and second sealing wire that lays respectively on described first flange and described second flange.

6. filtering face-piece respirator according to claim 4, wherein,

Described sealing wire is similar to fingerprint.

7. filtering face-piece respirator according to claim 1, wherein,

Described mask body comprises first flange and second flange with described mask body one.

8. filtering face-piece respirator according to claim 7, wherein,

Described first flange and described second flange have obvious visible first mark and second mark on the corresponding main surfaces of each flange.

9. filtering face-piece respirator according to claim 8, wherein,

Described designate similar is in fingerprint.

10. filtering face-piece respirator according to claim 9, wherein,

Described flange respectively occupies about 2 to 12 square centimeters surface area.

11. filtering face-piece respirator according to claim 10, wherein,

Described flange respectively occupies about 5 to 10 square centimeters surface area.

12. filtering face-piece respirator according to claim 9, wherein,

Described flange leaves described mask body separately and extends at least about 2 millimeters.

13. filtering face-piece respirator according to claim 12, wherein,

Described first flange and described second flange leave described mask body separately and extend at least 5 millimeters.

14. filtering face-piece respirator according to claim 13, wherein,

Described first flange and described second flange leave described mask body separately and extend at least about 1 centimetre, by described first flange of grasping and described second flange, and away from described mask body is manually drawn described flange in the opposite direction to the plane of dividing, and need not more manual operations, just can make described mask body present flat folding state.

15. filtering face-piece respirator according to claim 1, wherein,

Described mark occupies about 1 to 6 square centimeter surface area.

16. a method of making filtering face-piece respirator, described method comprises:

(a) provide mask body, on described mask body, have grip features;

(b) on described grip features, mark is set, with indication respirator user wherein the described mask body of grasping to equip;

(c) will be with tool to be fixed in described mask body.

17. method according to claim 16, wherein,

18. method according to claim 17, wherein,

On described first flange and described second flange, first mark and second mark are set respectively.

19. method according to claim 18, wherein,

Described first mark and described second mark comprise first welded pattern and second welded pattern that lays respectively on described first flange and described second flange.

20. method according to claim 19, wherein,

Described first welded pattern and described second welded pattern are similar to fingerprint separately, and respectively occupy about 2 to 4 square centimeters surface area.