Large-flux mining breathing mask filter element

Abstract

The utility model discloses a large-flux mining breathing mask filter element, and relates to the technical field of filtration, the large-flux mining breathing mask filter element comprises a main body, the edge of the main body is subjected to hot pressing to form a sealing edge, the main body is of a multi-layer structure and sequentially comprises a non-woven fabric, a filter layer and a melt-blown layer from top to bottom, the filter layer comprises electrostatic cotton and a heavy ion microporous membrane, the filter layer is of a broken-line-shaped structure, and the melt-blown layer is of a melt-blown structure. The non-woven fabric and the melt-blown layer are respectively connected to the highest point and the lowest point of the filter layer. The filter layer in a broken line form is adopted, the filter area is multiplied in a limited space, then the breathing resistance is effectively reduced, and the wearing comfort of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of filtration technology, and in particular to a high-flux mining breathing mask filter element. Background Art

[0002] Respirators are used for respiratory protection in environments with poor air quality, such as underground coal mines. The mask is worn on the user's face, with a filter covering the mouth and nose. The filter traps particulate matter from the outside air, purifying the air and protecting the user's health.

[0003] In mining scenarios, the particle size of airborne particles is relatively small, reaching the micron level. Currently, mask filters consisting solely of a meltblown layer and other auxiliary structures are ineffective in intercepting such particles. Consequently, mask filters using heavy ion microporous membranes have emerged on the market. These membranes, with numerous micron-sized through-holes, effectively filter airborne particles, preventing them from entering the human body, as seen in CN206275936U.

[0004] However, while the filter element using heavy ion microporous membrane has high filtration accuracy, it also has relatively large breathing resistance, causing users to experience discomfort after wearing the mask using this filter element for a long time. Utility Model Content

[0005] The embodiment of the present application provides a high-flux mining breathing mask filter element to solve the problem of large breathing resistance caused by the small through-hole diameter of the filter element in the prior art.

[0006] An embodiment of the present application provides a high-flux mining respiratory mask filter element, including a main body, the edges of the main body are sealed by hot pressing, the main body is a multi-layer structure, and from top to bottom includes a non-woven fabric, a filter layer and a melt-blown layer, the filter layer includes electrostatic cotton and a heavy ion microporous membrane, the filter layer is a zigzag structure, and the non-woven fabric and the melt-blown layer are respectively connected at the highest point and the lowest point of the filter layer.

[0007] In a possible implementation, the filter layer has a plurality of parallel edge bending lines, a straight portion is formed between two adjacent edge bending lines, the straight portion has a plurality of parallel central bending lines, and the straight portion is folded at the central bending line.

[0008] In a possible implementation, the heavy ion microporous membrane is coated with an adhesive on each central bending line, and the electrostatic cotton is bonded to the heavy ion microporous membrane on the central bending line.

[0009] In a possible implementation, the length of the straight line portion located in the center of the filter layer is greater than the length of the straight line portion located at the edge.

[0010] In one possible implementation, both the non-woven fabric and the melt-blown layer have curved structures, or the non-woven fabric has a curved structure, while the melt-blown layer has a flat structure.

[0011] In a possible implementation, the nonwoven fabric and the meltblown layer are respectively provided with pull rings on the sides facing away from the filter layer.

[0012] In a possible implementation, the filter layer is coated with an adhesive at the highest point and the lowest point, respectively, and the non-woven fabric and the meltblown layer are bonded to the highest point and the lowest point of the filter layer, respectively.

[0013] In a possible implementation, the electrostatic cotton in the filter layer is one or two layers.

[0014] The high-flux mining breathing mask filter element in this application has the following advantages:

[0015] The use of a zigzag filter layer multiplies the filter area in a limited space, thereby effectively reducing breathing resistance and improving the user's wearing comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 A side view of a high-flux mining breathing mask filter element provided in the first embodiment of the present application;

[0018] Figure 2 A side view of a high-flux mining breathing mask filter element provided in the second embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the internal structure of the high-flux mining breathing mask filter element provided in the first embodiment of the present application in a folded state;

[0020] Figure 4 This is a schematic diagram of the internal structure of the high-flux mining breathing mask filter provided in the first embodiment of the present application in the open state;

[0021] Figure 5 for Figure 4 A partial enlarged schematic diagram of area A in the middle.

[0022] Description of the accompanying drawings: 100, main body; 110, non-woven fabric; 120, melt-blown layer; 130, filter layer; 131, electrostatic cotton; 132, heavy ion microporous membrane; 200, edge sealing. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] Figure 1-5 Schematic diagram of the structure of a high-flux mining respiratory mask filter provided in an embodiment of the present application. The embodiment of the present application provides a high-flux mining respiratory mask filter, comprising a main body 100, the edges of which are heat-pressed to form an edge seal 200. The main body 100 is a multi-layer structure, comprising, from top to bottom, a non-woven fabric 110, a filter layer 130, and a melt-blown layer 120. The filter layer 130 comprises an electrostatic cotton 131 and a heavy ion microporous membrane 132. The filter layer 130 is a zigzag structure, with the non-woven fabric 110 and the melt-blown layer 120 connected at the highest and lowest points of the filter layer 130, respectively.

[0025] For example, at the edge of the main body 100, the non-woven fabric 110, the electrostatic cotton 131, the heavy ion microporous membrane layer 132 and the meltblown layer 120 are overlapped in sequence from top to bottom. After hot pressing treatment, the overlapping edges will melt and become a whole to form a sealing edge 200 for maintaining the shape of the main body 100.

[0026] In an embodiment of the present application, the non-woven fabric 110 and the meltblown layer 120 can both adopt a rectangular or circular structure, while the filter layer 130 adopts a structure similar in shape to the non-woven fabric 110 and the meltblown layer 120 but larger in size. For example, when the non-woven fabric 110 and the meltblown layer 120 adopt a rectangular structure, the filter layer 130 can adopt a rectangular structure with the same width as the non-woven fabric 110 or the meltblown layer 120, but a longer length. When the non-woven fabric 110 and the meltblown layer 120 adopt a circular structure, the filter layer 130 adopts an elliptical structure with a short axis length the same as the radius of the non-woven fabric 110 or the meltblown layer 120, but a longer long axis. After adopting the above-mentioned rectangular or elliptical structure, the filter layer 130 needs to be bent along the length direction of the rectangle or the long axis direction of the ellipse. The projected shape and size of the bent filter layer 130 are equivalent to those of the non-woven fabric 110 and the meltblown layer 120. Therefore, the non-woven fabric 110 and the meltblown layer 120 can be hot-pressed and bonded to the bent filter layer 130.

[0027] Furthermore, after being bent, the filter layer 130 forms a wavy shape with multiple highest points and multiple lowest points arranged in sequence. The edges of the wavy filter layer 130 at the first wave and the last wave are flat, so it can be hot-pressed with the non-woven fabric 110 and the melt-blown layer 120, and each wave is a curved surface in the direction of sequential arrangement. The curved surface needs to be flattened and then hot-pressed with the non-woven fabric 110 and the melt-blown layer 120. The final main body 100 is a three-dimensional structure with flat edge sealing 200 on all four sides.

[0028] Furthermore, the electrostatic cotton 131 in the filter layer 130 is one or two layers. The function of the electrostatic cotton 131 is to intercept larger particles in the air. After the outside air passes through the non-woven fabric 110, the largest particles are intercepted, forming the first filtration. After the filtered air passes through one or two layers of electrostatic cotton 131, a second filtration is formed. The air then continues to pass through the heavy ion microporous membrane 132. Particles with a particle size exceeding 5μm are intercepted by the heavy ion microporous membrane 132. Only a very small portion of small-sized particles pass through the meltblown layer 120 and enter the human body.

[0029] Furthermore, the filter layer 130 is coated with an adhesive at its highest and lowest points, respectively, and the non-woven fabric 110 and meltblown layer 120 are bonded to the highest and lowest points of the filter layer 130, respectively. In addition to bonding with an adhesive, the highest and lowest points of the filter layer 130 can also be connected to the non-woven fabric 110 and meltblown layer 120, respectively, through heat pressing. After bonding, the filter layer 130 is fixedly connected to the non-woven fabric 110 and meltblown layer 120, preventing significant displacement and deformation of the filter layer 130 within the connection between the non-woven fabric 110 and meltblown layer 120, which could result in uneven distribution of the filter layer 130 within the connection between the non-woven fabric 110 and meltblown layer 120 and reduce air flow.

[0030] In a possible embodiment, the filter layer 130 has a plurality of parallel edge bending lines, a straight portion is formed between two adjacent edge bending lines, the straight portion has a plurality of parallel central bending lines, and the straight portion is folded at the central bending line.

[0031] For example, the edge bend line is located at the highest point or lowest point of the filter layer 130, and the portion between two adjacent edge bend lines is the straight portion. The straight portion is usually planar, and the planar straight portion can provide sufficient support for the non-woven fabric 110 and the meltblown layer 120 to maintain the three-dimensional shape of the main body 100. However, while maintaining the three-dimensional shape of the main body 100, it also results in a larger volume of the main body 100. This larger volume is necessary when the filter element is in use, but it will lead to unnecessary waste of space during storage. Therefore, the present application also provides multiple central bend lines on the straight portion. The number of these central bend lines is at least two and preferably an even number. The multiple central bend lines are parallel to each other and are also parallel to the edge bend lines.

[0032] After the central bending line is set, the straight portion can bend an even number of times to return to a direction nearly parallel to its original direction, thereby achieving folding of the straight portion. This folding structure can effectively reduce the volume occupied by the main body 100 when stored. During use, by pulling the non-woven fabric 110 and meltblown layer 120 in opposite directions, the straight portion can be flattened, thereby allowing the main body 100 to enter a larger open state.

[0033] Furthermore, the non-woven fabric 110 and the melt-blown layer 120 are respectively provided with pull rings on the sides facing away from the filter layer 130. The pull rings can be provided at one or more positions on the outer sides of the non-woven fabric 110 and the melt-blown layer 120 to facilitate pulling the non-woven fabric 110 and the melt-blown layer 120 in opposite directions.

[0034] Specifically, the pull ring can be fixed to the non-woven fabric 110 and the melt-blown layer 120 by bonding or hot pressing, or can be integrally formed with the non-woven fabric 110 and the melt-blown layer 120. It should be understood that the pull ring is merely a relatively small protruding structure on the outer surface of the non-woven fabric 110 and the melt-blown layer 120, and it can be rotated to a direction parallel to the non-woven fabric 110 or the melt-blown layer 120 to reduce the space occupied during use.

[0035] Furthermore, the heavy ion microporous membrane 132 is coated with an adhesive on each central bending line, and the electrostatic cotton 131 is bonded to the heavy ion microporous membrane 132 on the central bending line.

[0036] Specifically, similarly to the connection of filter layer 130 with nonwoven fabric 110 and meltblown layer 120, heavy ion microporous membrane 132 can also be connected with electrostatic cotton 131 on the central fold line by means of heat pressing. Except central fold line, heavy ion microporous membrane 132 and electrostatic cotton 131 can also be connected by means of bonding or heat pressing on the edge fold line. After completing the connection of heavy ion microporous membrane 132 and electrostatic cotton 131, heavy ion microporous membrane 132 will be connected together with electrostatic cotton 131 at the bent position, and although the unbent position is not connected together, these positions are all planar states, and will be posted together under the drive of adjacent two joints, so that heavy ion microporous membrane 132 and electrostatic cotton 131 can simultaneously undergo identical shape change.

[0037] In a possible embodiment, the length of the straight line portion located in the center of the filter layer 130 is greater than the length of the straight line portion located at the edge.

[0038] For example, by adopting this method of reducing the length of the straight portion from the center to the edge, the main body 100 is formed into a shape with a high center and a low edge. By adopting this shape, the main body 100 can gradually transition from a flat state of the edge seal 200 to a state with a greater height, and the overall structure is streamlined and more beautiful.

[0039] Furthermore, the non-woven fabric 110 and the melt-blown layer 120 both have curved structures, or the non-woven fabric 110 has a curved structure, while the melt-blown layer 120 has a flat structure.

[0040] Specifically, when the non-woven fabric 110 and the melt-blown layer 120 are both curved structures, the shapes and sizes of the two can be exactly the same, and the formed main body 100 is a shape that is symmetrical up and down, such as Figure 1 As shown, the non-woven fabric 110 and the melt-blown layer 120 may also be of similar shape but different size. In this case, the curved surfaces formed by the non-woven fabric 110 and the melt-blown layer 120 will not be exactly the same when viewed from the side. When the non-woven fabric 110 is a curved surface structure and the melt-blown layer 120 is a flat structure, the flat melt-blown layer 120 can adapt to the shape of the side of the mask close to the user's mouth and nose, such as Figure 2 shown.

[0041] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0042] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A high-flux mining breathing mask filter element, comprising a main body (100), wherein the edge of the main body (100) is formed into an edge seal (200) by hot pressing, and the main body (100) is a multi-layer structure, which comprises, from top to bottom, a non-woven fabric (110), a filter layer (130) and a melt-blown layer (120), wherein the filter layer (130) comprises an electrostatic cotton (131) and a heavy ion microporous membrane (132), and is characterized in that: The filter layer (130) is a broken-line structure, and the non-woven fabric (110) and the melt-blown layer (120) are connected at the highest point and the lowest point of the filter layer (130), respectively.

2. A high-flux mining breathing mask filter according to claim 1, characterized in that: The filter layer (130) has a plurality of parallel edge bending lines, a straight portion is formed between two adjacent edge bending lines, the straight portion has a plurality of parallel central bending lines, and the straight portion is folded at the central bending line.

3. A high-flux mining breathing mask filter according to claim 2, characterized in that: The heavy ion microporous membrane (132) is coated with an adhesive on each of the central bending lines, and the electrostatic cotton (131) is bonded to the heavy ion microporous membrane (132) on the central bending line.

4. A high-flux mining breathing mask filter according to claim 2, characterized in that: The length of the straight line portion located in the center of the filter layer (130) is greater than the length of the straight line portion located at the edge.

5. A high-flux mining breathing mask filter according to claim 4, characterized in that: The non-woven fabric (110) and the melt-blown layer (120) are both curved structures, or the non-woven fabric (110) is a curved structure, while the melt-blown layer (120) is a flat structure.

6. A high-flux mining breathing mask filter according to claim 2, characterized in that: The non-woven fabric (110) and the melt-blown layer (120) are respectively provided with pull rings on the sides facing away from the filter layer (130).

7. A high-flux mining breathing mask filter according to claim 1, characterized in that: The filter layer (130) is coated with an adhesive at the highest point and the lowest point, respectively. The non-woven fabric (110) and the melt-blown layer (120) are bonded to the highest point and the lowest point of the filter layer (130), respectively.

8. The high-flux mining breathing mask filter according to claim 1, characterized in that: The electrostatic cotton (131) in the filter layer (130) is one layer or two layers.

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