Filtering structure having through holes and preparation method therefor

Abstract

A filtering structure having through holes, and a preparation method therefor. The filtering structure having through holes comprises filtering sheets (1) and supporting rubber strips (2). The filtering sheets (1) are distributed at intervals in the thickness direction thereof, and an area between adjacent filtering sheets (1) serves as a filtering channel. The supporting rubber strips (2) are arranged in parallel and are arranged in the filtering channels at intervals. Each supporting rubber strip (2) is connected to the adjacent filtering sheets (1), and an area between the supporting rubber strips (2) in a same filtering channel serves as a filtering through hole (6).

Description

A through-hole filter structure and a preparation method thereof

[0001] The present application claims priority to the Chinese patent application No. 202410472953.1, filed on April 19, 2024, and entitled "A through-hole filter structure and a preparation method thereof", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of filters, in particular to a through-hole filter structure and a preparation method thereof. BACKGROUND

[0003] The through-hole filter is generally used for adsorbing chemical pollutants, and has a straight-through flow channel. Compared with ordinary filters, the fluid passing through the through-hole filter can directly penetrate the filter body from the straight-through flow channel without being forced to pass through a medium layer with high resistance. Therefore, the through-hole filter has the advantages of low resistance and high flow efficiency.

[0004] At present, the most widely used through-hole filter is a corrugated filter. The corrugated filter includes flat filter layers parallel to the through-hole and corrugated support layers supported between the flat filter layers. When the corrugated filter is manufactured, the material must be pressed and bonded into a single corrugated sheet, and then the different parts of the single corrugated sheet are selectively bonded and stacked and solidified, and then cut. The process is complicated and has a low yield.

[0005] In addition, when the corrugated filter is prepared, the corrugated support layer can only be set to a corresponding size of the waveform according to the size of the through-hole diameter. The size of the waveform has strict limitations. In general, there are more bonding positions between the waveform and the flat filter layer, and more glue is used, which causes the filter material to be covered by the adhesive and lose more performance, thereby affecting the filtering performance and efficiency.

[0006] Therefore, the problems of large resistance, low yield, and complicated process restrict the large-scale production and application of the through-hole filter. How to improve the above problems is a technical problem faced and needed to be solved by those skilled in the art.

[0007] SUMMARY

[0008] The purpose of the present application is to provide a through-hole filter structure and a preparation method thereof to solve the problems existing in the prior art. The support adhesive tape is used as the support structure and the fixing structure of the filter sheet, which can eliminate the limitation of the corrugated waveform, reduce the bonding position, and thus reduce the flow resistance and the influence of the adhesive on the filtering performance, and improve the filtering performance and the yield.

[0009] To achieve the above purpose, the present application provides the following solutions.

[0010] The application provides a through-hole filter structure, comprising filter sheets and support rubber strips, the filter sheets are distributed in the thickness direction, the area between adjacent filter sheets is a filter channel, the support rubber strips are arranged in parallel and in the filter channel, the support rubber strips connect adjacent filter sheets, and the area between the support rubber strips in the same filter channel is a filter through-hole.

[0011] Preferably, the support rubber strips are arranged at the same position on the front and back of the filter sheet, and the filter through-holes of adjacent filter channels are arranged in alignment.

[0012] Preferably, the support rubber strips are arranged at different positions on the front and back of the filter sheet, and the filter through-holes of adjacent filter channels are arranged in misalignment.

[0013] Preferably, the filter sheet adopts at least one of filter paper containing adsorbent, non-woven fabric, carbon cloth, foam, electret film and polymer-covered electrode sheet.

[0014] Preferably, the support rubber strip adopts at least one of polymer materials with EVA, EPDM and PO hot melt properties.

[0015] The application also provides a preparation method of a through-hole filter structure, which adopts the through-hole filter structure as described above, and comprises the following contents:

[0016] Preparation of a base material, the base material has a matrix distribution of openings, and the base material on both sides of the openings in the length direction of the base material is a filter sheet;

[0017] Coating of a support rubber strip, the support rubber strip is parallel to the length direction of the base material; in the width direction of the base material, the first area is between adjacent openings, and in the length direction of the base material, the second area is between adjacent openings, and the support rubber strip is located at the intersection of the first area and the second area;

[0018] Pre-cooling of the support rubber strip to ensure the strength of the support rubber strip and the stable size;

[0019] Reheating of the support rubber strip, and wave collection of the base material, the filter sheet and the opening form a filter through-hole.

[0020] Preferably, the base material adopts an entire filter sheet, and the opening is formed on the filter sheet.

[0021] Preferably, a bending line is processed, the bending line is located on both sides of the opening in the length direction of the base material, and the bending line is a discontinuous virtual line or a continuous indentation line.

[0022] Preferably, the substrate comprises auxiliary strips arranged in parallel and filter sheets distributed at intervals in the length direction of the auxiliary strips and bonded on the auxiliary strips, and the area surrounded by the auxiliary strips and the filter sheets serves as the opening.

[0023] Preferably, the auxiliary strips are at least one of paper, non-woven fabric, polymer mesh, film and foam.

[0024] The present application has the following technical effects relative to the prior art:

[0025] The present application uses the support adhesive strips as the support structure and fixing structure of the filter sheets, and by reasonably setting the spacing between the support adhesive strips, the filter through holes can be formed in cooperation with the filter sheets. Compared with the traditional through hole filter (vertical corrugation), the through hole filter prepared by the present application has the advantages of small sizing amount and lower structural resistance. Under the same specification and equivalent resistance, the effective mass transfer area of the filter sheets and air is increased, and the filtration efficiency is improved. That is, the present application can eliminate the limitation of corrugated wave shape, reduce the bonding position, and thus reduce the flow resistance and the influence of adhesive on the filtration performance, and improve the filtration performance and yield.

[0026] The other technical solutions of the present application can also achieve the following technical effects:

[0027] The present application punches the sheet material or uses the auxiliary strips to assist, uses the change of bending modulus to guide the material to naturally bend at the desired bending position when receiving waves, and the support adhesive strips play the role of support and bonding, thereby forming a processing method of through hole filter. The above processing method can facilitate the implementation of the technical solutions of the present application, and finally improve the yield.

[0028] The preparation of the traditional through hole filter (vertical corrugation) needs to go through many processes such as pressing single tile, sizing and stacking, curing, and slitting, especially the cutting process. The non-toothed belt knife is used for friction cutting, the fracture surface is easy to pull out, the finished product has high resistance, and the yield is low. The present application does not involve many processes of the traditional through hole filter, and the prepared through hole filter has the advantages of short process, low cost, simple process and high automation, and by using shearing instead of friction cutting of single sheet, the finished product fracture surface is flat and not easy to pull out, further reducing the resistance of the finished product filter. The present application has small sizing amount, avoids the cutting pull-out condition, has high yield, and has low structural resistance.

[0029] The application solves the problems of difficult cutting and complex process when the sheet material is used to make a through-hole filter, and improves the production process of the existing filter without a baffle, expands the use of the common glue coating-wave collecting process of the filter without a baffle, and transforms the existing filter production line into a through-hole filter production line with a small degree of modification, which is mature and reliable in process and can efficiently produce the through-hole filter.

[0030] Due to the characteristics of the hot melt adhesive line, the prepared product has flexibility. The flexibility of the product can be further improved by alternatingly coating the front and back surfaces, and the through-hole filter of the application has lower resistance and flexibility than the existing through-hole filter (vertical corrugated), and is easy to bend. The problem of reduced filtering efficiency when the traditional through-hole filter is bent is also solved.

[0031] The traditional IFD dust collecting plate (plastic corrugated plate) has a large air resistance due to the material selection problem, and the preparation process needs printing, stacking and electrothermal wire cutting, which is complicated. The uneven heating in the electrothermal wire cutting process can cause material warping, low yield and slow production. Compared with the traditional IFD dust collecting plate, the application has the advantages of not easy to warp, high yield, low structural resistance, few forming process steps, simple processing, low cost and high automation level. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Fig. 1 is a schematic diagram of a base material formed by stamping processing of the application;

[0034] Fig. 2 is a schematic diagram of the front and back surface alternating coating method of Fig. 1;

[0035] Fig. 3 is a schematic diagram of a base material formed by pasting processing of the application;

[0036] Fig. 4 is a schematic diagram of the front and back surface alternating coating method of Fig. 3;

[0037] Fig. 5 is a schematic diagram of the base material wave collecting process using the glue coating method of Fig. 1 or Fig. 3;

[0038] Fig. 6 is a schematic diagram of the base material wave collecting process using the glue coating method of Fig. 2 or Fig. 4;

[0039] Fig. 7 is a schematic diagram of the finished product formed by Fig. 5;

[0040] Fig. 8 is a schematic diagram of the finished product formed by Fig. 6;

[0041] Wherein, 1, filter sheet; 2, support adhesive tape; 3, opening; 4, bending line; 5, auxiliary strip; 6, filter through hole. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0043] The purpose of the present application is to provide a through hole filtering structure and a preparation method thereof, so as to solve the problems existing in the prior art. The support adhesive tape is used as the support structure and fixing structure of the filter sheet, which can eliminate the limitation of the corrugated wave shape, reduce the bonding position, and thus reduce the flow resistance and the influence of the adhesive on the filtering performance, improve the filtering performance and the yield.

[0044] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0045] As shown in Figures 1-8, the present application provides a through-hole filter structure, comprising a filter sheet 1 and a supporting adhesive tape 2, the filter sheet 1 has the function of adsorbing pollutants for the fluid flowing through its surface, the filter sheet 1 can be processed by selecting known materials, in order to improve the mass transfer efficiency, the filter sheet 1 can be pressed into corrugated or other forms that can disturb the airflow, the supporting adhesive tape 2 itself has a certain spatial shape, through the setting of the supporting adhesive tape 2, it can not only connect the filter sheet 1 but also combine the filter sheet 1 into a filter through-hole 6. Specifically, the filter sheet 1 is spaced in the thickness direction, forming a parallel plate structure, the filter sheet 1 has a corresponding spacing, called interlayer spacing; the depth of the filter through-hole 6 is called the thickness of the through-hole filter structure; the size of the interlayer spacing matches the width of the filter through-hole 6 along the length direction of the base material, the thickness of the through-hole filter structure matches the size of the filter sheet 1 in the depth direction of the filter through-hole 6; it should be noted that the size of the filter through-hole 6 cannot be unlimitedly enlarged, otherwise it will affect the filtering effect, nor can it be too small, otherwise it will increase the resistance of the fluid passing through the filter through-hole 6, and the thickness of the through-hole filter structure cannot be too small, otherwise it will affect the filtering effect, nor can it be unlimitedly enlarged, otherwise it will increase the resistance of the fluid passing through the filter through-hole 6; therefore, it is necessary to reasonably design the size of the filter through-hole 6 through test or simulation. The area between adjacent filter sheets 1 is used as a filter channel, the filter channel is used for fluid flow and makes the fluid flow through the filter sheet 1, the supporting adhesive tape 2 is arranged in parallel and spaced in the filter channel, and the filter channel is separated by the supporting adhesive tape 2, thereby the supporting adhesive tape 2 connects adjacent filter sheets 1, and the area between the supporting adhesive tapes 2 in the same filter channel forms a filter through-hole 6, that is, the filter channel is divided into a plurality of filter through-holes 6, and each filter through-hole 6 forms a unit for filtering fluid.

[0046] The present application uses the supporting adhesive tape 2 as the supporting structure and fixing structure of the filter sheet 1, by reasonably setting the spacing between the supporting adhesive tapes 2, the filter through-hole 6 can be formed in cooperation with the filter sheet 1, compared with the traditional through-hole filter (vertical corrugated), the through-hole filter prepared by the present application has the advantages of small sizing amount and lower structural resistance, under the same specification and equal resistance, the effective mass transfer area of the filter sheet 1 and air is increased, and the filtering efficiency is improved, that is, the present application can eliminate the limitation of corrugated wave shape, reduce the bonding position, thereby reducing the flow resistance and the influence of adhesive on the filtering performance, and improving the filtering performance and yield.

[0047] As shown in FIG. 1, FIG. 3, FIG. 5 and FIG. 7, the support adhesive tape 2 can be arranged at the same position on the front and back of the filter sheet 1, and after the filter sheet 1 is bent, the same position on the front and back of the filter sheet 1 is bonded, thereby forming a finished product as shown in FIG. 7, at this time, the filter through holes 6 of adjacent filter channels are in alignment, and the multiple filter through holes 6 in the length direction of the base material are arranged in a straight line. In this form of structure, the shape of the filter through hole 6 is basically fixed, thus the deformation ability of the whole through hole filter structure is similar to the current corrugated filter structure, and cannot realize flexible bending deformation, but the position of the support adhesive tape 2 can be reasonably arranged according to the requirement, thereby forming a long and narrow filter through hole 6, reducing the resistance, and ensuring the flow and filtration efficiency.

[0048] As shown in FIG. 2, FIG. 4, FIG. 6 and FIG. 8, the support adhesive tape 2 can be arranged at different positions on the front and back of the filter sheet 1, and the dashed line in the figure represents the support adhesive tape 2 on the back, for example, one row in the length direction of the base material is arranged on the front, and the adjacent row is arranged on the back, and the product is received, the front adhesive line is bonded with the front adhesive line, and the back adhesive line is bonded with the back adhesive line, thereby forming a finished product as shown in FIG. 8, at this time, the filter through holes 6 of adjacent filter channels are distributed in staggered manner, and the multiple filter through holes 6 in the length direction of the base material are arranged in a zigzag line. In this form of structure, the position of the support adhesive tape 2 connected by the filter through hole 6 is not relatively fixed, thus the filter through hole 6 can be expanded and deformed in a diamond shape, so that the through hole filter structure can realize flexible bending deformation, and the bendability of the product can be further improved, thereby improving the adaptability of the structure.

[0049] Further, the filter sheet 1 can adopt at least one of filter paper containing adsorbent, non-woven fabric, carbon cloth, foam, electret film and polymer covered electrode sheet, and can be arranged by mixing multiple materials, and the free combination of the above-mentioned materials belongs to the adaptation and adjustment made by the person skilled in the art, and should be within the scope of the present application. It should be noted that the sheet materials such as fabric, non-woven fabric, paper and film made of materials with ferroelectricity or materials with electret property obtained by post-processing are used in the processing method or the product obtained by the processing method, and due to their characteristics, they can be applied to the dust collecting electrode, and are also within the protection scope of the present application. In addition, the electrode plate covered by the insulating polymer is processed by the processing method, and the dust collecting electrode is also within the protection scope of the present application.

[0050] The support adhesive tape 2 can adopt at least one of EVA, EPDM and PO hot melt polymer materials, and can be arranged by mixing multiple materials, and the free combination of the above-mentioned materials belongs to the adaptation and adjustment made by the person skilled in the art, and should be within the scope of the present application.

[0051] In the prior art, when the vertical corrugated layer and the flat plate layer are bonded, an adhesive must be applied, and the adhesive covers the surface of the material, causing the material to lose its adsorption capacity, resulting in invalid performance at this location, and the vertical corrugated bonding density is large, resulting in a large failure area. The adhesive bonding area of the parallel plate structure of the present application accounts for a small proportion, that is, the area that is invalid due to the coverage of the adhesive accounts for a small proportion. Under the same sheet thickness and the same opening rate, the invalid area of the vertical corrugated layer is higher than that of the present application. Therefore, when turbulence does not occur, the present application is superior to the vertical corrugated layer in the prior art. In addition, in terms of generating turbulence, the vertical corrugated layer has fewer applicable methods, while the present application can more flexibly adjust the shape of the punched single sheet to achieve the goal of increasing turbulence and improving efficiency, and the potential and later adjustment space are superior to the vertical corrugated layer. In summary, under the same specifications, the same materials, and the same resistance, the filtration efficiency of the present application is higher than that of the vertical corrugated layer.

[0052] In combination with FIGS. 1-8 again, the present application also provides a preparation method of the through-hole filter structure, which can use the through-hole filter structure as described above to prepare the through-hole filter structure as described above, and specifically includes the following contents:

[0053] A base material is prepared, which is a sheet-shaped long strip material that can form a through-hole filter structure after being bent in the later stage. When the base material is prepared, an opening 3 needs to be processed on the base material, or the opening 3 is formed during the preparation of the base material. The former can use a punching process, and the latter can use a splicing / overlapping forming method. The prepared base material has a matrix-distributed opening 3, and at least the base material on both sides of the opening 3 in the length direction of the base material serves as a filter sheet 1, which can serve as the wall of the filter through-hole 6 after being bent and formed.

[0054] A support adhesive tape 2 is applied, which should be parallel to the length direction of the base material, and after being bent, it is parallel to the axial direction of the filter through-hole 6, that is, the thickness direction of the through-hole filter structure. In the width direction of the base material, the first area is between adjacent openings 3, and in the length direction of the base material, the second area is between adjacent openings 3, and the support adhesive tape 2 is located at the intersection of the first area and the second area.

[0055] The support adhesive tape 2 is pre-cooled to ensure the strength and stable size of the support adhesive tape 2.

[0056] The support adhesive tape 2 is reheated, and the base material is coiled. When coiling, the base material needs to be bent alternately in the front and back directions to form a wave shape. After coiling, the filter sheet 1 and the opening 3 form the filter through-hole 6.

[0057] As shown in Fig. 1 and Fig. 2, the base material can adopt a whole filter sheet 1, and the filter sheet 1 is processed to form the opening 3 by punching, laser cutting, wire cutting and the like. Of course, the punching and shearing processing mode is preferred. The processing mode of processing more openings 3 on the filter sheet 1 and the like to achieve the improvement of auxiliary wave forming, reducing resistance and increasing the exposed area of the sheet material belongs to the conventional improvement of the structure of the present application, and should be included in the protection scope of the present application.

[0058] In a further aspect, the bending line 4 can also be processed, and the bending line 4 is located on both sides of the opening 3 in the length direction of the base material. It should be noted that the bending line 4 is parallel to the width direction of the base material, and the bending line 4 can be followed when the base material is waved, which facilitates bending at a determined position, thereby ensuring and improving the yield of the through-hole filter structure. More specifically, the bending line 4 can adopt a discontinuous connection dotted line, and of course, a continuous indentation line and the like can also be used.

[0059] As shown in Fig. 3 and Fig. 4, the base material can include an auxiliary strip 5 and a filter sheet 1, and the filter sheet 1 at this time is a slit strip, which is different from the whole sheet as described above and needs to be spliced / overlapped with the auxiliary strip 5. In the preparation of the base material, the auxiliary strip 5 is arranged in parallel, and the number and length of the auxiliary strip 5 are selected according to the width required by the through-hole filter structure, and the spacing between the auxiliary strip 5 is arranged according to the size requirement of the filter through-hole 6. The filter sheet 1 is spaced and bonded on the auxiliary strip 5 in the length direction of the auxiliary strip 5, and the spacing of the filter sheet 1 is set according to the size requirement of the filter through-hole 6. The area surrounded by the arranged auxiliary strip 5 and the filter sheet 1 is used as the opening 3, that is, the preparation of the base material is completed. The processing mode of forming more openings 3 on the filter sheet 1 by the cooperation of the auxiliary strip 5 and the filter sheet 1 to achieve the improvement of auxiliary wave forming, reducing resistance and increasing the exposed area of the sheet material belongs to the conventional improvement of the structure of the present application, and should be included in the technical solution of the present application.

[0060] Further, the auxiliary strip 5 can adopt at least one of paper, non-woven fabric, polymer net, film and foam, and can be mixed and arranged by multiple materials. The free combination of the above-mentioned materials belongs to the adaptation and adjustment made by the person skilled in the art, and should be included in the scope of the present application.

[0061] According to the foregoing description, the present application provides specific embodiments that can be implemented, for example as follows:

[0062] Embodiment one:

[0063] The processing flow can be divided into: 1 punching → 2 gluing → 3 pre-cooling, reheating → 4 wave forming

[0064] 1. Punching:

[0065] The sheet material in roll form (the sheet material itself can be used as the filter sheet 1, i.e. can play a filtering function) is punched to form a base material with openings 3. Without considering the thickness of the sheet material itself, the corresponding size of the openings 3 in the length direction of the sheet material (i.e. the base material) must be greater than or equal to the layer spacing of the through-hole filter to be prepared, i.e. the size of the openings 3 in this direction needs to be greater than or equal to the height of the filtering through-hole 6 on the through-hole filter to be prepared. In order to make the sheet material more easily bent when being rolled up, intermittent lines of weakness are pressed as bending lines 4 during punching, and two bending lines 4 on the same side of the opening 3 form a group, and the distance between the lines of weakness in the group is the layer spacing of the through-hole filter to be prepared, and the distance between the groups, i.e. the thickness of the through-hole filter to be prepared.

[0066] The corresponding size of the openings 3 in the width direction of the sheet material is the width of each filtering through-hole 6 of the through-hole filter to be prepared.

[0067] 2. Gluing:

[0068] The base material after punching is glued, and the gluing is intermittent. The gluing positions can be referred to in Figures 1 and 2, and the front and back surfaces are both glued, but two gluing methods are distinguished, one is that the front and back surfaces are both glued at corresponding positions, and the other is that the front and back surfaces are misaligned. The gluing is intermittent. After gluing, a glue line is formed, and the glue line is bonded to form a support glue strip 2, which supports and fixes the through-hole filter. The height (or thickness of the glue) of the support glue strip 2 needs to be slightly higher than half of the layer spacing of the through-hole filter to be prepared, and the glue lines on both sides overlap each other and are pressed to a width of the layer spacing, thereby achieving firm bonding.

[0069] 3. Pre-cooling, reheating:

[0070] Pre-cooling of the glue line is to achieve dimensional stability and strength during this process, and reheating is to give the surface layer of the glue line the ability to adhere to each other, facilitating mutual adhesion during the rolling process.

[0071] 4. Rolling up:

[0072] Referring to Figures 5 and 6, the rolling up forms a positive and negative bending wave shape. It needs to be noted that the support glue strip 2 shown in Figures 5 and 6 is only a schematic position and does not represent the specific structure size. Since the bending modulus of the sheet material at the punched line of weakness (bending line 4) is greatly weakened, the sheet material will bend at the line of weakness during rolling up, so the rolling up can be carried out as expected.

[0073] Example two:

[0074] The processing flow can be divided into: 1. Gluing of the auxiliary strip, pulling → 2. Sticking of the sheet material → 3. Gluing → 4. Pre-cooler, reheating → 5. Rolling up

[0075] 1. Auxiliary strip gluing and pulling:

[0076] Select a thin paper with high tensile strength but low bending modulus, a polymer film, a net, and other materials as the auxiliary strip 5. Glue the auxiliary strip 5 to make it can be pasted and fixed with the sheet material (as the filter sheet 1).

[0077] 2. Paste the sheet material:

[0078] Paste the sheet material on the auxiliary strip 5 with glue. Without considering the thickness of the auxiliary strip 5, glue, and sheet material itself, the length of the sheet material is the width of the through-hole filter, the width of the sheet material is the thickness of the through-hole filter, and the distance between the sheet materials is the layer spacing of the through-hole filter.

[0079] 3. Glue and glue:

[0080] The glue position is shown in Figures 3 and 4. Glue on both sides, but distinguish between two ways of gluing. One is to glue on both sides of the corresponding position, and the other is to glue on both sides of the corresponding position. The glue line is intermittent. The role of the glue line is to support and fix the filter. After gluing, a glue line is formed, which is bonded to form a support glue strip 2. The support glue strip 2 supports and fixes the through-hole filter. The height of the support glue strip 2 (or the thickness of the glue) needs to be slightly higher than half of the desired layer spacing of the through-hole filter. After the glue lines on both sides overlap and are pressed, the width of the layer spacing is reached, and thus firm bonding can be achieved.

[0081] 4. Pre-cooling and reheating: Pre-cooling of the glue line is to achieve dimensional stability and strength during this process. Reheating is to give the surface layer of the glue line the ability to bond with each other, making it easier to bond with each other during the wave collection process.

[0082] 5. Wave collection:

[0083] Referring to Figures 5 and 6, the wave collection forms a positive and negative bending wave. It should be noted that the support glue strip 2 shown in Figures 5 and 6 is only a schematic position and does not represent the specific structure size. Because the bending modulus of the auxiliary strip 5 is very small, and the bending modulus of the sheet material is much larger at the corresponding position, the bending will occur at the position where the sheet material is not bonded during wave collection, and the support glue strip 2 formed by the glue line will expand the layer spacing, thereby producing a through-hole filter.

[0084] The specific examples in the present application illustrate the principles and implementation methods of the present application. The above examples are only used to help understand the method and core idea of the present application. For those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A via filter structure, characterized by: The filter structure comprises filter sheets and support rubber strips, the filter sheets are arranged in the thickness direction of the filter structure, the areas between adjacent filter sheets are filter channels, the support rubber strips are arranged in parallel and in the filter channels, the support rubber strips connect the adjacent filter sheets, and the areas between the support rubber strips in the same filter channel are filter through holes.

2. The via filter structure of claim 1, wherein: The support rubber strips are arranged at the same positions on the front and back surfaces of the filter sheets, and the filter through holes of adjacent filter channels are arranged in alignment.

3. The via filter structure of claim 1, wherein: The support rubber strips are arranged at different positions on the front and back surfaces of the filter sheets, and the filter through holes of adjacent filter channels are arranged in misalignment.

4. The via filter structure of claim 1, wherein: The filter sheets adopt at least one of filter paper containing adsorbents, non-woven fabric, carbon cloth, foam, electret film and polymer-covered electrode sheet.

5. The via filter structure of claim 1, wherein: The support rubber strips adopt at least one of polymer materials with EVA, EPDM and PO hot melt properties.

6. A method of manufacturing a via filter structure, characterized by, The through-hole filter structure comprises the following contents: A base material is prepared, the base material has matrix-distributed open holes, and the base material on both sides of the open holes in the length direction of the base material is filter sheet; A support rubber strip is coated, the support rubber strip is parallel to the length direction of the base material, and the support rubber strip is arranged at the intersection of the first area and the second area between adjacent open holes in the width direction of the base material and in the length direction of the base material; The support rubber strip is pre-cooled to ensure the strength and stable size of the support rubber strip; The support rubber strip is re-heated, the base material is collected, the filter sheet and the The open holes form filter through holes.

7. The method of claim 6, wherein: The base material adopts an entire filter sheet, and the open holes are formed on the filter sheet.

8. The method of claim 7, wherein: A bending line is processed, the bending line is located on both sides of the open hole in the length direction of the base material, and the bending line is discontinuous connection dotted line or continuous arrangement indentation line.

9. The method of claim 6, wherein: The base material comprises an auxiliary strip and filter sheets, the auxiliary strip is arranged in parallel, the filter sheets are arranged in the length direction of the auxiliary strip and are bonded on the auxiliary strip, and the areas surrounded by the auxiliary strip and the filter sheets are the open holes.

10. The method of claim 9, wherein: The auxiliary strip adopts at least one of paper, non-woven fabric, polymer net, film and foam.

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