FIELD
The present disclosure generally relates to a respiratory protection device capable of adhering to a user's face without straps, forming a bowl-shaped air chamber during use and becoming flat folded when packaged.
BACKGROUND
Respiratory protection devices are worn over the breathing passage of a wearer for preventing environmental impurities, contaminants or pathogens from entering user's breathing track. For example, people live in an air-polluted environment use respiratory protection devices to prevent inhaling harmful suspended particles and to protect the facial skin exposed to the air. Respiratory protection devices may also be used to block the air flow from wearer's breathing. For example, patients may use respiratory protection devices to prevent spreading pathogens, or people working in an operating room or clean room may use respiratory protection devices to keep the saliva particles from the environment.
Traditional respiratory protection devices are positioned on wearer's face by one or more harness straps for ears or head. However, the straps may not keep the masks seamlessly attached to the user's face for sufficient filtration and also may bring uncomfortable pressure to the wearer. When receiving tension from harness straps, the masks made of a flexible material are deformed and leave space at the periphery. The masks made of a rigid material may maintain its shape under tension, but the rigid masks may not fit everyone's face and will leave spaces, too. The unfiltered, polluted air is easily inhaled through the spaces. On the other hand, harness straps that come in one size may bring pain to some wearers' ears or head, and may lower user's willingness to use the masks.
Some accessories on the masks may help to isolate the unfiltered air. For example, sponge or other soft materials set on the mask periphery and metal piece on the nose bridge may augment the sealing engagement between the masks and the wearers' faces. But addition of the accessories increases the complexity and cost in manufacturing. The accessories may also increase the package volume of the masks.
The present disclosure provides a respiratory protection device made of soft materials comprising folds in zig-zag pattern on the main body and may adhere to wearer's face by adhesives instead of straps. The respiratory protection device with folds is expandable to transit from flat-fold configuration to open ready-to-use configuration, collapsible to transit from open ready-to-use configuration to flat-fold configuration, and flexible to keep adhered to wearer's face when the respiratory protection device is dragged in conjunction with the movement of wearer's face. The folding structures may not only reduce the storage volume but also support the main body of the respiratory protection device to provide large air chamber for breathing comfortably with a completely sealed space filled with filtered clean air. The present disclosure also provides a process of manufacturing the respiratory protection device by folding and fixing barrier layers and applying adhesive on the barrier layers.
BRIEF DESCRIPTION OF THE DRAWINGS
An embodiment of the present disclosure is described with reference to the accompanying drawings, in which:
FIG. 1 illustrates a respiratory protection device with no straps positioned on the face of the user according to one embodiment of the present disclosure.
FIG. 2 illustrates a front view of an expandable respiratory protection device with no straps in flat-fold configuration according to one embodiment of the present disclosure.
FIG. 3 illustrates a rear view of an expandable respiratory protection device with no straps in flat-fold configuration according to one embodiment of the present disclosure.
FIG. 4 illustrates a cross-section taken along line 2-2′ of an expandable respiratory protection device with no straps in flat-fold configuration shown in FIG. 2 according to one embodiment of the present disclosure.
FIG. 5 illustrate an enlarged front view in part of an expandable respiratory protection device with no straps in flat-fold configuration according to one embodiment of the present disclosure.
FIG. 6 illustrates a side view from the length of an expandable respiratory protection device with no straps in flat-fold configuration according to one embodiment of the present disclosure.
FIG. 7 illustrate an enlarged rear view in part of an expandable respiratory protection device with no straps in flat-fold configuration according to one embodiment of the present disclosure.
FIG. 8 illustrate a transition of an expandable respiratory protection device with no straps from flat-fold configuration to open ready-to-use configuration according to one embodiment of the present disclosure.
FIG. 9 illustrates a front view of a collapsible respiratory protection device with no straps in open ready-to-use configuration according to one embodiment of the present disclosure.
FIG. 10 illustrates a side view from the width of a collapsible respiratory protection device with no straps in open ready-to-use configuration according to one embodiment of the present disclosure.
FIG. 11 illustrates a rear view of a collapsible respiratory protection device with no straps in open ready-to-use configuration according to one embodiment of the present disclosure.
FIG. 12 illustrates a first transition of a collapsible respiratory protection device with no straps from arched state to flattened state according to one embodiment of the present disclosure.
FIG. 13 illustrates a second transition of a collapsible respiratory protection device with no straps from arched state to flattened state according to one embodiment of the present disclosure.
FIG. 14 illustrates an expandable respiratory protection device with no straps which is in half-fold configuration and is store in a container bag according to one embodiment of the present disclosure.
FIG. 15 illustrates a half of the collapsible respiratory protection device with no straps in open ready-to-use configuration dissected along line 2-2′ according to one embodiment of the present disclosure.
FIG. 16 illustrates concave notches in a form of key-hole according to one embodiment of the present disclosure.
DETAILED DESCRIPTION
In one embodiment of the present disclosure as shown in FIG. 1, a respiratory protection device with no straps 100 in open ready-to-use configuration forms a bowl-shaped air-chamber over the mouth and nose of a user and adheres to user's face at the periphery of the respiratory protection device bringing the respiratory protection device in sealing engagement with the user. The present disclosure may also be a respiratory protection device such as a surgical mask, a clean room mask, a dust mask, a breath warming mask, a face shield, and a variety of face coverings according to some embodiments of the present disclosure.
In one embodiment of the present disclosure as shown in FIGS. 2 and 3, a front view and a rear view of an expandable respiratory protection device with no straps 100 in flat-fold configuration may comprise a main body 110 in a flattened state, a sealing periphery 120 surrounds the main body 110, a central fold 130 and adhesive 140 substantially on the rear side of the sealing periphery 120. The main body 110 may further comprise a pair of top panels (first top panel 111a and second top panels 111b), a pair of bottom panels (first bottom panel 112a and second bottom panel 112b), and at least a pair of intermediate panels (not shown) between the top panels 111a, 111b and bottom panels 112a, 112b. Two of aforementioned panels (including top panels 111a, 111b, intermediate panels and bottom panels 112a, 112b) may be joined together by respective long side to compose a fold which comprises a folding line and an approximate area, which is substantially respective sides of the adjacent panels, along the folding line. In some implementations, each pair of the aforementioned adjacent panels may be formed as one piece but separated by a fold, and in other implementations, each pair of the aforementioned adjacent panels may further be joined through a seam, a weld or a bond. Referring to FIGS. 2 and 3 again, the folds with folding line on the side away from the center of the respiratory protection device and protruding outward are denoted as mountain folds 114a and 114b. The folds with folding line on the side near the center of the respiratory protection device and denting inward are denoted as valley folds 115a and 115b. In one embodiment of the present disclosure, the two top panels 111a and 111b, which are the uppermost panels, may be joined in parallel by respective long sides so that the two top panels 111a and 111b are located on opposite sides of an transverse axis (shown as a dash line) defined by the two ends of the long side connecting the uppermost panels of the first set and the second set. In some implementations, the top panels 111a and 111b may further be manufactured in one piece. In one embodiment of the present disclosure, the top panels 111a and 111b may respectively join the adjacent top one of a plurality of intermediate panels through mountain folds 114a and 114b. The bottom panels 112a and 112b may respectively join the adjacent bottom one of a plurality of intermediate panels through valley folds 115a and 115b.
In one embodiment of the present disclosure as shown in FIG. 4, a cross-section of the respiratory protection device in flat-fold configuration taken along line 2-2′, shows a first set of stacked panels and a second set of stacked panels comprised of the expandable respiratory protection device. Each of the first set and the second set comprises a top panel 111, one or more intermediate panels 113 and a bottom panel 112 joined one by one at long sides in a zig-zag pattern and are fixed together at two short sides. One of the long sides of an uppermost panel, the top panel 111a, of the first set merges with one of the long sides of an uppermost panel, the top panel 111b, of the second set so that the first set and the second set are located on opposite sides of the transverse axis defined by the two ends of the long side connecting the uppermost panels of the first set and the second set. The first set of stacked panels together forms the first half of main body 110, and the second set of stacked panels together forms the second half of main body 110. The top panels 111a and 111b may respectively join the adjacent top one of a plurality of intermediate panels 113 though mountain folds 114a and 114b. The bottom panels 112a and 112b may respectively join the adjacent bottom one of a plurality of intermediate panels 113 through valley folds 115a and 115b. Each of the intermediate panels 113 may join another adjacent intermediate panels 113 one by one through either mountain folds 114 or valley folds 115. In some implementations, the zig-zag patterns of the two sets of stacked panels are substantially symmetrical to each other. The numbers of panels in both sets with symmetrical zig-zag pattern are the same. Two panels at corresponding position in two respective sets of stacked panels with symmetrical zig-zag pattern are substantially in the same shape and area. A configuration of the mountain folds 114 and the valley folds 115 of the first half body is substantially symmetrical to a configuration of the mountain folds 114 and the valley folds 115 of the second half body. In one embodiment of the present disclosure, the top panels 111a and 111b and the intermediate panels 113 may be substantially equal in area. In one embodiment of the present disclosure, the top panels 111a and 111b and the intermediate panels 113 may be smaller than bottom panels 112a and 112b in area for forming specific shapes of air chamber in ready-to-use configuration. In some implementations, the top panels 111a and 111b, the intermediate panels 113 and the bottom panels 112a and 112b may further be different in area, such as gradually reduced in area from the bottom panels 112a and 112b, through the intermediate panels 113, to the top panels 111a and 111b. In some implementations, the number of intermediate panels 113 between the first top panel 111a and the first top panel 112a may be larger or smaller than the number of intermediate panels 113 between the second top panel 111b and the second bottom panel 112b for forming specific shapes of air chamber in ready-to-use configuration.
Referring to FIGS. 5 and 6, the sealing periphery 120 may contain edge seals 121 and may surround the main body 110. In one embodiment of present disclosure, the edge seals may be surface indentations in any configuration to compress and fix multi-layers of sheets forming main body 110 together. In some implantations, the sealing periphery 120 may be 1-15 mm in width and may be especially 8 mm in width for better sealing effect and not compressing the room for air chamber in ready-to-use configuration. In one embodiment of present disclosure, the edge seals 121 may be in the form of dots 121a, lines 121b and texts 121c each providing different strength of sealing and different softness while attaching to a user's face. In some implementations, the edge seals may be in the form of two-dimensional figures. The sealing periphery 120 may comprise two fold-gathering regions 122 on corresponding lateral sides of the respiratory protection device 100. Each of the fold-gathering regions 122 on corresponding sides may be respectively defined by the union of respective part of sealing periphery 120 receiving mountain folds 114 and valley folds 115. The fold-gathering regions 122 may seal a plurality of fold 114 and 115 and a plurality of panels 111, 112 and 113 at short sides. Therefore, by moving the fold-gathering regions 122 toward each other, the panels 111, 112 and 113 and the folds 114 and 115 may bend and form the air chamber in ready-to-use configuration accordingly.
In one embodiment of the present disclosure, the respiratory protection device 100 comprising a first half body and a second half body substantially in a plane shape. Each of the first and second half bodies comprises a plurality of mountain folds 114 protruding outward, a plurality of valley folds 115 denting inward, and a periphery 120 surrounding the half body. The mountain folds 114 and the valley folds 115 are substantially parallel and arranged alternatingly. The periphery 120 comprises two fold-gathering regions 122 and the folds are closed and fixed at the fold-gathering regions. The first half body and the second half body are joined by a side so that the first half body and the second half body are located on opposite sides of a transverse axis defined by two ends of the side connecting the first half body and the second half body.
In one embodiment of present disclosure, the edge seals in the form of lines 121b may provide higher sealing strength and hardness than edge seals in the form of dots 121a do. A combination of different forms and number of edge seals 121 (such as combinations of edge seals 121a, 121b and 121c) may be included in specific parts of sealing periphery 120 such as the fold-gathering regions 122 which bear large force during transition of the respiratory protection device 100 between ready-to-use configuration and flat-fold configuration.
In one embodiment of present disclosure, the fold-gathering regions 122 on the adjacent short sides may form two concave notches leaving space beside the respiratory protection device 100 for the panels 111, 112 and 113 and folds 114 and 115 moving during transition of the respiratory protection device 100. The presence of space prevents the fold-gathering regions 122 from bending outward or inward and leaving air pathway between the respiratory protection device 100 and the wearer. In some implementations, the concave notches leave space in form of a trapezoid, a triangle or a semicircle. In some implementations, the concave notches each comprises a pair of straight lines joined by a curved line. The two lines become closer to each other during transition and may be parallel when the transition is done. The curved line bends and prevents forming discomforting sharp structure on the respiratory protection device 100 during transition. In some implementations, the concave notches each comprising two straight lines joined by one curved line may be in form of a key-hole, as shown in dash line in FIG. 16.
In one embodiment of present disclosure, referring to FIGS. 2 and 6, the central fold 130 may be defined by a fold for folding the respiratory protection device 100 in substantial half and the curved structure nearby the fold referring to FIG. 6. The central fold 130 may be substantially perpendicular to the transverse axis and parallel to a vertical axis defined by centers of the side connecting the first half body and the second half body. The central fold 130 may be substantially perpendicular to the transverse axis and parallel to a vertical axis defined by centers of the long sides of the first set of panel and the second set of panel. The central fold 130 may cross all the plurality of panels and folds. The central fold 130 may be a positioning reference to user's face while in use.
In one embodiment of the present disclosure as shown in FIGS. 3 and 7, the adhesive 140 may be distributed on the lowermost panels along the outer edge of the respiratory protection device 100 bringing the respiratory protection device 100 in sealing engagement with the user. In some implementations, the adhesive 140 comprising two portions located apart from each other on the respiratory protection device 100 for adhering the respiratory protection device 100 to two sides on user's face. In some implementations, the adhesive 140 may be a substantially continuous sealing layer distributed on substantially an entire edge of the respiratory protection device 100 for sealing substantially an entire edge of the air chamber of the respiratory protection device 100 in open ready-to-use configuration. The width of the adhesive 140 may vary and the adhesive strength may positively correlate to the width of the layer 140. The adhesive 140 may provide enough adhesive strength with a minimum width and may provide least space for forming an air chamber with a maximum width. The width of the adhesive 140 may not diminish the volume of air chamber to an extent which hinders user's breathing. In one embodiment of the present disclosure, the width of the adhesive 140 may be close to the width of the sealing periphery 120. In some implementations, the adhesive 140 may be 1-15 mm in width and may be especially 8 mm in width based on the width of the sealing periphery 120.
The glutinous material may be distributed onto the respiratory protection device 100 in kinds of track which may affect the adhesion strength and surface structure of the adhesive 140. The glutinous material may be distributed in a non-linear track substantially along the edge of the respiratory protection device 100. The non-linear track may include curves and turns and may further be an uncrossed non-linear track, such as a serrated track, or a crossed non-linear track including one or more crossed points on the track, such as a helical track 141a and 141b as shown in FIG. 7. The glutinous material at crossed points on the crossed non-linear track may be thicker than the nearby structure.
Adhesion strength of the adhesive 140 may be stronger with a thicker or a wider layer. The topology of crossed non-linear distributing track or the discharging quantity of the glutinous material may affect the thickness of the adhesive 140. For example, referring to FIG. 7, a compact helical distributing track 141a of the glutinous material may include more crossed points and corresponding thicker structures therefore giving stronger adhesive strength. In one embodiment of present disclosure, an amount of the adhesive distributed on a portion of the outer edge of the respiratory protection device 100 is higher than an amount of the adhesive distributed on another portion of the outer edge. In some implementations, the compact helical distributing track 141a may be on the rear sides of two fold-gathering regions 122 to give a stronger adhesive strength than the loosen helical distributing track 141b on the rear side of remaining regions of the sealing periphery 120. In some implementations, the thicker adhesive may be in the regions contacting more skin secretions, such as regions contacting with the skin of the nose.
The surface of the adhesive 140 formed by a non-linear distributing track or by a distributing track with varying discharging quantity may be relatively uneven to the surface of the adhesive 140 formed by a linear distributing track with constant discharging quantity. For example, the helical distributing track 141a and 141b of the glutinous material shown in FIGS. 3 and 7 may result in the uneven surface of the adhesive 140. The uneven surface of the adhesive 140 may leave space for discharging secretions, such as air and liquid, from skin while providing enough adhesion strength.
In some implementations, the adhesive 140 may be a pressure sensitive adhesives possessing certain properties including the following: (1) permanent tack, (2) adherence with no higher than finger pressure, (3) sufficient ability to hold onto the skin, and (4) sufficient cohesive strength. The glutinous material may be polymers providing appropriate adhesion strength between the respiratory protection device and user's skin, such as various (meth) acrylate based copolymers, naturel rubbers, synthetic rubbers, and silicones. The glutinous material may be removable from user's skin. In one embodiment of present disclosure, the glutinous material may be a material whose glutinousness may positively relate to the temperature for providing high adhesiveness while attaching to skin of users in open ready-to-use configuration.
Referring to FIG. 8, there is a transition of a respiratory protection device with no straps 100 from flat-fold configuration to open ready-to-use configuration. The main body 110 transits from a flattened state to an arched state forming the air chamber. The respiratory protection device 100 in the flat-fold configuration may transit while the respective bottom panels 112a and 112b or the joining parts of sealing periphery 120 receiving two substantially antiparallel force 151a and 151b perpendicular to and away from the transverse axis and the folds 114 and 115, denoted as arrows in dash line. In the transition of the respiratory protection device 100, the bottom panels 112a and 112b may move along the directions of force 151a and 151b respectively and may pull a plurality of joined intermediate panels 113 outward. Centers of the panels 111, 112 and 113 move away from the transverse axis radially so that the panels 111, 112 and 113 unstack and become joined with each other angularly. The mountain folds 114 and valley folds 115 open and the centers of each mountain folds 114 and valley folds 115 move away from the transverse axis radially. The panels 111, 112 and 113 may gradually become unfolded at an angle in some degree. The central fold 130 may extend with the moving panels 111, 112 and 113 and may become arched. However, the panels 111, 112 and 113 and the folds 114 and 115 may be fixed at the fold-gathering regions 122, so the panels 111, 112 and 113 and the folds 114 and 115 may gradually become arched and may pull the fold-gathering regions 122 to move toward the middle of folds 114 and 115. The adjacent fold-gathering regions 122 of the first and second half bodies move toward each other so that the first half and the second half body become arched. Every point in the fold-gathering regions 122 may move toward the transverse plane 3-3′ (shown as a dash line) which is extended from the joined edge of two top panels 111a and 111b and perpendicular to the top panels 111a and 111b, except for the points already on the transverse plane 3-3′. The arched panels 111, 112 and 113 may gradually form the dome-shaped main body 110 and the respiratory protection device 100 may transit to the open ready-to-use configuration.
In one embodiment of the present disclosure as shown in FIGS. 9-10, a front view and a side view of a collapsible respiratory protection device with no straps 100 in open ready-to-use configuration, each of the arched panels 111, 112 and 113 may join the adjacent panels at an angle in some degree without overlapping in most of the area. The arched panels 111, 112 and 113 can be viewed as a set of arched part. Two sets of arched parts form the collapsible respiratory protection device 100. The main body 110 is in an arched state. The curved central fold 130 together with the arched panels 111, 112 and 113 and arched folds 114 and 115 may give the dome-shaped main body 110 a shear strength for maintaining its shape. The arched panels 111, 112 and 113 and the arched folds 114 and 115 may be sealed at the respective fold-gathering regions 122 and may be arranged in a radial pattern with two radial centers in each fold-gathering region (referring to FIG. 10) playing the role of framework defining the dome-shaped main body 110 and the corresponding air chamber. The fold-gathering regions 122 may bend in response to the structural stress from the dome-shaped main body 110. In one embodiment of present disclosure, the concave notches formed by the fold-gathering regions 122 may give enough space for said fold-gathering regions 122 to bend inward and keep the whole sealing periphery 120 on a substantial plane without extrusion due to the bending. The sealing periphery 120 on a substantial plane may provide a better sealing engagement between the respiratory protection device 100 and the user. In some implementations, the fold-gathering regions 122 may also be in the form of a straight line or a convex line. The fold-gathering regions 122 in straight or convex line may bend to the front or to the rear during the open ready-to-use configuration transition.
In one embodiment of the present disclosure as shown in FIG. 11, a rear view of a collapsible respiratory protection device with no straps 100 in open ready-to-use configuration, a bowl-shaped air chamber 116 may be defined by the dome-shaped main body 110 and the adhesive 140. The bowl-shaped air chamber 116 may provide space for breathing and air exchange through the main body 110. In one embodiment of present disclosure, the bowl-shaped air chamber 116 may keep a constant volume during breathing due to the shear strength of the main body 110. In one embodiment of present disclosure, the adhesive 140 comprising a first portion and a second portion located apart from each other for adhering the respiratory protection device 100 to two sites on an object. When the two sites of the object move in respect to each other, the first set and the second set move in conjunction with movement of the two sites and at least one angle between two adjacent parts of the first and second sets changes so that the respiratory protection device 100 remains adhered to the object.
Referring to FIG. 12, there is a first transition process of a collapsible respiratory protection device 100 from open ready-to-use configuration to flat-fold configuration. The main body 110 changes from an arched state to a flattened state. The respiratory protection device 100 in open ready-to-use configuration may change while the bottom panels 112a and 112b or the joining parts of sealing periphery 120 receiving two substantially antiparallel force perpendicular to and toward the folds 114 and 115, denoted as arrows in dash line. In the transition process of the respiratory protection device 100, the bottom panels 112a and 112b may move along the direction of force 151a and 151b respectively and may push a plurality of joined intermediate panels 113 inward. Centers of the panels 111, 112 and 113 and folds 114 and 115 move toward the transverse axis radially until the panels of the first and second sets stack in a zig-zag pattern. The two short sides and the two fold-gathering regions 122 of the first set and the second set move away from each other to cause the panels 111, 112 and 113 to be flattened. The angles comprised by panels 111, 112 and 113 may decrease to 0 degree and the panels 111, 112 and 113 may fold and overlapped. The respiratory protection device 100 may change into the aforementioned flat-fold configuration.
Referring to FIG. 13, there is a second transition process of a collapsible respiratory protection device 100 from open ready-to-use configuration to flat-fold configuration. The main body 110 changes from an arched state to a flattened state. The respiratory protection device 100 in open ready-to-use configuration may change while the two fold-gathering regions 122 respectively receiving two substantially antiparallel force 153a and 153b away from the middle of folds 114 and 115 and parallel to the folds 114 and 115, denoted as arrows in dash line. In the transition of the respiratory protection device 100, the two fold-gathering regions 122 move away from each other to cause the panels 111, 112 and 113 to be flattened. Centers of the panels 111, 112 and 113 move toward the transverse axis radially until the panels of the first and second sets stack in a zig-zag pattern. The arched panels 111, 112 and 113 and arched folds 114 and 115 may be pulled by the fold-gathering regions 122 and gradually become flattened. The angles comprised by panels may decrease to 0 degree. The bottom panels 112a and 112b and a plurality of intermediate panels 113 may move toward the top panels 111a and 111b and may overlap with each other. The respiratory protection device 100 may change into the aforementioned flat-fold configuration.
In one embodiment of the present disclosure as shown in FIG. 14, the respiratory protection device with no straps 100 in flat-fold configuration may be folded in half along the central fold 130 and may be stored in a container bag 202. The whole adhesive 140 may be covered by a releasing liner 201 having smooth surfaces (e.g. by polishing or coating with wax or silicone) for repeatable contact with adhesive 140. The releasing liner 201 with smooth surfaces may prevent adhesive 140 from adhering to each other or other inappropriate materials and may preserve the glutinousness of the adhesive 140 when the respiratory protection device is folded along the central fold. In one embodiment of present disclosure, a releasing liner 201 may be placed at the inner face of a substantial half-fold respiratory protection device 100 and may be clamped by the half-fold respiratory protection device 100. The container bag 202 may include space inside for storing one or more of half-fold respiratory protection device 100. In one embodiment of the present disclosure, the container bag 202 may comprise of soft materials. In some implementations, the soft container bag 202 may be a wrapper.
Referring to FIG. 15, a half of the respiratory protection device with no straps 100 in open ready-to-use configuration dissected along line 2-2′ is illustrated according to one embodiment of the present disclosure. The main body 110 of the respiratory protection device 100 may be made of soft materials. The soft materials may be comprised of one or more air permeable layers sealed at the periphery of the main body 110 by edge seals 121. The aforementioned layers may include one or more barrier layers that prevent the transfer of liquid, such as liquid aerosols or liquid splashes, from penetrating. The one or more barrier layers may also include a layer as a filter that blocks particles in specific size range (e.g. PM 2.5). The one or more barrier layers may further comprise a layer disposed with absorptive materials which may remove hazardous or odorous gases from the breathing air, such as activated carbon that may have been chemically treated, porous alumina-silica catalyst substrates and alumina particles. The one or more barrier layers may further comprise a water absorptive layer in some implementations. In one embodiment of the present disclosure, the respiratory protection device 100 may comprise three or more layers in equal area, an inner layer 117a, one or more intermediate layers 117b and an outer layer 117c. The inner layer 117a may comprise a skin-friendly surface (generally on the side toward user in ready-to-use configuration) for providing comfort to users while in ready-to-use configuration. The outer layer 117c may comprise a water-proof or hydrophobic surface for keeping the other layers dry while encountering water, especially in ready-to-use configuration. The intermediate layers 117b may include the aforementioned barrier layers having filtration and absorption capabilities. In some implementations, the intermediate filtration layers 117b may cover the whole area of main body 110 to filter all the gas passing through the main body 110, especially the region corresponding to the air chamber. In some implementations, one of the plurality of layers may be enlarged, such as an inner layer 117a enlarged and extended at the portion contacting user's nose.
In one embodiment of the present disclosure, a method for manufacturing the respiratory protection device 100 comprising: providing one barrier layer, forming a first set of zig-zag folds and a second set of zig-zag folds 114 and 115 on two opposite long sides of the barrier layer, closing and fixing two ends of the first set and the second set on two opposite short sides on the barrier layer, cutting the short sides of the barrier layer to form a concave notch on each of the short side and applying adhesive 140 on an outer edge of the barrier layer for allowing the respiratory protection device 100 to be adhered to an object. In some implementations, the adhesive 140 is applied along substantially all edge of the respiratory protection device 100. In some implementations, an amount of the adhesive 140 distributed on a portion of the outer edge of respiratory protection device 100 is higher than an amount of the adhesive 140 distributed on another portion of the outer edge. In some implementations, the adhesive 140 is applied along a non-linear track comprising one or more crossed points on the track. In some implementations, the short sides of the barrier layer are cut to form two concave notches leaving space beside the respiratory protection device 100. In some implementations, the respiratory protection device 100 is further folded in half so that the adhesive 140 faces an inner face side of the folded respiratory protection device and a releasing liner 201 is placed between the adhesive 140.
The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.
Patent Application
20210321687
