A through-hole filtering structure and a preparation method thereof

Abstract

The application discloses a through-hole filtering structure and a preparation method thereof, and belongs to the technical field of filters. The through-hole filtering structure comprises filtering sheets and supporting rubber strips. The filtering sheets are distributed at intervals in the thickness direction. The area between adjacent filtering sheets is used as a filtering channel. The supporting rubber strips are arranged in parallel and at intervals in the filtering channel. The supporting rubber strips connect the adjacent filtering sheets. The area between the supporting rubber strips in the same filtering channel is used as a filtering through-hole. The supporting rubber strips are used as the supporting structure and the fixing structure of the filtering sheets. The limitation of the corrugated wave shape is eliminated. The bonding positions are reduced. The flow resistance is reduced. The influence of the adhesive on the filtering performance is reduced. The filtering performance and the yield are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filter, in particular to a through-hole filter structure and a preparation method thereof. BACKGROUND

[0002] The through-hole filter is generally used for adsorbing chemical pollutants, and has a straight-through flow channel. Compared with a common filter, a 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.

[0003] At present, the most widely used through-hole filter is a corrugated filter. The corrugated filter includes flat filter layers parallel to through-holes and corrugated support layers supported between the flat filter layers. When the corrugated filter is manufactured, the material is pressed and bonded into a single corrugated piece, and then different parts of the single corrugated piece are selectively bonded and stacked and solidified, and then cut. The process is complicated and has a low yield.

[0004] In addition, when the corrugated filter is prepared, the corrugated support layer can only be set to have a corresponding size of a wave shape according to the size of the through-hole diameter. The size of the wave shape has strict limitations. In general, there are more bonding positions between the wave shape 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.

[0005] 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. SUMMARY

[0006] 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 wave shape, 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.

[0007] To achieve the above purpose, the present application provides the following solutions.

[0008] The present application provides a through-hole filter structure, which comprises filter sheets and support adhesive tapes. The filter sheets are distributed at intervals in the thickness direction. The area between adjacent filter sheets serves as a filter channel. The support adhesive tapes are arranged in parallel and at intervals in the filter channel. The support adhesive tapes connect adjacent filter sheets. The area between the support adhesive tapes in the same filter channel serves as a filter through-hole.

[0009] Preferably, the support rubber strip is arranged at the same position on both sides of the filter sheet, and the filter through holes of adjacent filter channels are arranged in alignment.

[0010] Preferably, the support rubber strip is arranged at different positions on both sides of the filter sheet, and the filter through holes of adjacent filter channels are arranged in misalignment.

[0011] Preferably, the filter sheet is at least one of filter paper containing adsorbent, non-woven fabric, carbon cloth, foam, electret film, and polymer covered electrode sheet.

[0012] Preferably, the support rubber strip is at least one of EVA, EPDM, and PO hot melt polymer materials.

[0013] The application also provides a preparation method of the through-hole filter structure, which uses the through-hole filter structure as described above, and includes the following steps:

[0014] A base material is prepared, which has a matrix distribution of openings, and the base material on both sides of the openings in the length direction of the base material serves as a filter sheet;

[0015] A support rubber strip is applied, which 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;

[0016] The support rubber strip is pre-cooled to ensure the strength and stable size of the support rubber strip;

[0017] The support rubber strip is re-heated, and the filter sheet is collected to form filter through holes with the openings.

[0018] Preferably, the base material is a whole filter sheet, and the openings are formed on the filter sheet.

[0019] Preferably, a bending line is processed, which is located on both sides of the openings in the length direction of the base material, and the bending line is a discontinuous dotted line or a continuous indentation line.

[0020] Preferably, the base material includes an auxiliary strip and a filter sheet, the auxiliary strip is arranged in parallel, the filter sheet is arranged in intervals in the length direction of the auxiliary strip and is bonded on the auxiliary strip, and the area surrounded by the auxiliary strip and the filter sheet serves as the opening.

[0021] Preferably, the auxiliary strip is at least one of paper, non-woven fabric, polymer mesh, film, and foam.

[0022] The present application has the following technical effects relative to the prior art:

[0023] The present application uses support rubber strips as the support structure and fixing structure of the filter sheet, and by reasonably setting the spacing between the support rubber strips, the filter through holes can be formed in cooperation with the filter sheet.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 structure resistance.Under the same specification and equivalent resistance, the effective mass transfer area of the filter sheet 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, and thus reduce the flow resistance and the influence of the adhesive on the filtering performance, and improve the filtering performance and yield.

[0024] The other technical solutions of the present application can also achieve the following technical effects:

[0025] The present application punches the sheet material or uses 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 rubber strips play the role of support and bonding, thereby forming a processing method of a through hole filter.Using the above processing method can facilitate the implementation of the technical solutions of the present application, and finally improve the yield.

[0026] The preparation of the traditional through hole filter (vertical corrugated) needs to go through many processes such as pressing single tile, sizing stacking, curing and slitting, especially the cutting process, which uses a toothless belt knife to rub and cut, the fracture surface is easy to pull out hair, the finished product has high resistance and low yield.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 rubbing cutting single sheet, the finished product fracture surface is smooth and not easy to pull out hair, further reducing the resistance of the finished product filter.The present application has small sizing amount, avoids cutting hair, has high yield and low structure resistance.

[0027] The present application solves the problems of difficult cutting and complex process when using sheet material to make a through hole filter, and can improve the manufacturing process of the existing non-baffle filter, expand the use of the common gluing-receiving wave process of the non-baffle filter, and transform the existing non-baffle filter production line into a through hole filter production line with small modification, which is mature and reliable and can efficiently produce through hole filters.

[0028] Due to the characteristics of the hot melt glue line, the prepared product has flexibility. The product can be further improved in flexibility by interlacing the front and back surfaces with glue, and the through hole filter of the present application has lower resistance and flexibility than the existing through hole filter (vertical corrugated), and is easy to bend. It also solves the problem of reduced filtering efficiency when the traditional through hole filter is bent.

[0029] Compared with the traditional IFD dust collecting plate (plastic corrugated plate), the application has the advantages of not easy to warp, high yield, low structural resistance, less forming process steps, simple processing, low cost and high automation level. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0031] Figure 1 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure.

[0032] Figure 2 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure. Figure 1 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure.

[0033] Figure 3 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure.

[0034] Figure 4 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure. Figure 3 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure.

[0035] Figure 5 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure. Figure 1 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure. Figure 3 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure.

[0036] Figure 6 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure. Figure 2 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure. Figure 4 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure.

[0037] Figure 7 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure. Figure 5 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure.

[0038] Figure 8 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure. Figure 6 The schematic diagram of the base material formed by stamping processing of the application is shown in the figure.

[0039] Wherein, 1, filter sheet; 2, support adhesive strip; 3, opening; 4, bending line; 5, auxiliary strip; 6, filter through hole. DETAILED DESCRIPTION

[0040] Clearly, the described embodiments are only a part 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 skilled in the art without creative efforts fall within the protection scope of the present application.

[0041] 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, to support the adhesive tape as the support structure and fixing structure of the filter sheet, to eliminate the limitation of the corrugated wave shape, to reduce the bonding position, and to reduce the flow resistance, the influence of the adhesive on the filtering performance, and the filtering performance and the yield.

[0042] 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 in combination with the drawings and specific embodiments.

[0043] As shown in Figures 1 to 8 The present application provides a through-hole filter structure, which comprises a filter sheet 1 and a support 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 support adhesive tape 2 itself has a certain spatial shape. Through the arrangement of the support adhesive tape 2, the filter sheet 1 can be connected and combined with the filter sheet 1 into a filter through-hole 6. Specifically, the filter sheet 1 is distributed at intervals in the thickness direction, forming a structure in the form of parallel plates. The filter sheet 1 has a corresponding interval, which is called the interlayer interval. The depth of the filter through-hole 6 is called the thickness of the through-hole filter structure. The size of the interlayer interval 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. It also cannot be too small, otherwise it will increase the resistance of the fluid passing through the filter through-hole 6. The thickness of the through-hole filter structure cannot be too small, otherwise it will affect the filtering effect. It also cannot 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 support adhesive tape 2 is arranged in parallel and at intervals in the filter channel, which separates the filter channel. Thus, the support adhesive tape 2 connects adjacent filter sheets 1. The area between the support 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. Each filter through-hole 6 forms a unit for filtering the fluid.

[0044] The present application takes the support rubber strip 2 as the support structure and fixing structure of the filter sheet 1, and by reasonably setting the spacing between the support rubber strips 2, the filter through holes 6 can be formed in cooperation with the filter sheet 1. 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 structure resistance. Under the same specification and equivalent 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 the adhesive on the filtering performance, and improving the filtering performance and yield.

[0045] Combining Figure 1 , Figure 3 , Figure 5 and Figure 7 , the support rubber strip 2 can be arranged at the same position on the front and back of the filter sheet 1. When 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 Figure 7 . At this time, the filter through holes 6 of adjacent filter channels are in alignment, and the plurality of filter through holes 6 in the length direction of the base material are arranged in a straight line. The shape of the filter through hole 6 is basically fixed in this form of structure, so the deformation ability of the whole through hole filter structure is comparable to the corrugated filter structure at present, and cannot realize flexible bending deformation, but the position of the support rubber strip 2 can be reasonably set according to the demand, thereby forming a long and narrow filter through hole 6, reducing the resistance, and ensuring the flow and filtering efficiency.

[0046] Combining Figure 2 , Figure 4 , Figure 6 and Figure 8 , the support rubber strip 2 can be arranged at different positions on the front and back of the filter sheet 1. The dashed line in the figure represents the support rubber strip 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. The product is collected when the front rubber line is bonded with the front rubber line, and the back rubber line is bonded with the back rubber line, thereby forming a finished product as shown in Figure 8 . At this time, the filter through holes 6 of adjacent filter channels are distributed in staggered positions, and the plurality of filter through holes 6 in the length direction of the base material are sequentially arranged in a zigzag shape. In this form of structure, the position of the support rubber strip 2 connected by the filter through hole 6 is not relatively fixed, so 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.

[0047] Further, the filter sheet 1 can adopt at least one of filter paper containing adsorbent, non-woven fabric, carbon sandwich cloth, foam, electret film, polymer covered electrode sheet, and can adopt a mixed arrangement of multiple materials, free combination of the above-listed materials, which are made by adaptation and adjustment by those skilled in the art and should be within the scope of the present application. It should be noted that: for the fabric, non-woven fabric, paper, film and other sheet materials made of materials with ferroelectricity or materials with electret properties obtained by post-processing, using the processing method described in the present application or the product obtained by the processing method described in the present application, due to its characteristics, it can be applied to the dust collecting electrode, and it is also within the protection scope of the present application. In addition, for the electrode plate covered by the insulating polymer, the electrode plate is processed according to the processing method described in the present application to obtain the dust collecting electrode, which is also within the protection scope of the present application.

[0048] The support adhesive tape 2 can adopt at least one of EVA, EPDM, PO hot melt polymer materials, and can adopt a mixed arrangement of multiple materials. Similarly, free combination of the above-listed materials, which are made by adaptation and adjustment by those skilled in the art and should be within the scope of the present application.

[0049] 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, making it lose the adsorption capacity, resulting in invalid performance at this position. The bonding density of the vertical corrugated layer is large, and the invalid area caused by this is large. In the parallel plate structure of the present application, the adhesive bonding area accounts for a small proportion, that is, the area accounted for by the adhesive covering and becoming invalid is small. Under the same sheet thickness and the same opening rate, the invalid area accounted for by the vertical corrugated layer is higher than that of the present application. Therefore, it can be known that, when there is no turbulence, the present application is superior to the vertical corrugated layer in the prior art. In addition, in terms of manufacturing 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. The potential and the space for later adjustment are superior to those of the vertical corrugated layer. In summary, under the same specifications, the same materials and the same resistance, the filtering efficiency of the present application is higher than that of the vertical corrugated layer.

[0050] Again in combination Figures 1 to 8 The present application also provides a preparation method of the through-hole filter structure, which can adopt the through-hole filter structure as described above, and is used for preparing the through-hole filter structure as described above, and specifically includes the following contents:

[0051] The substrate is prepared as a sheet-shaped long strip material, which can form a through-hole filter structure after being bent and processed. In the preparation of the substrate, the opening 3 needs to be processed on the substrate, or the opening 3 is formed during the preparation of the substrate. The former can be processed by punching, and the latter can be processed by splicing / overlapping. The prepared substrate has a matrix-distributed opening 3. In the length direction of the substrate, at least the substrate on both sides of the opening 3 serves as a filter sheet 1. After being bent and formed, the filter sheet 1 can serve as the wall of the filter through-hole 6.

[0052] The support adhesive tape 2 is applied parallel to the length direction of the substrate, 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 substrate, the first area is between adjacent openings 3, and in the length direction of the substrate, the second area is between adjacent openings 3. The support adhesive tape 2 is located at the intersection of the first area and the second area.

[0053] The support adhesive tape 2 is pre-cooled to ensure the strength and stable size of the support adhesive tape 2.

[0054] The support adhesive tape 2 is reheated, and the substrate is coiled. When coiling, the substrate 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.

[0055] As shown in Figure 1 and Figure 2 , the substrate can be a whole filter sheet 1. The opening 3 is processed on the filter sheet 1 by punching, laser cutting, wire cutting, etc. Of course, the punching and shearing processing method is preferred. The processing method of processing more openings 3 on the filter sheet 1 to achieve auxiliary coiling forming, reduce resistance, and increase the exposed area of the sheet material is a common improvement of the structure of the present application, which should be included in the protection scope of the present application.

[0056] In a further scheme, a bending line 4 can also be processed. In the length direction of the substrate, the bending line 4 is located on both sides of the opening 3. It should be noted that the bending line 4 is parallel to the width direction of the substrate. When coiling the substrate, it can be coiled along the bending line 4, which is convenient for bending at a certain position, thereby ensuring and improving the yield of the through-hole filter structure. More specifically, the bending line 4 can be a discontinuous connection dotted line, and of course, it can also be in the form of a continuous indentation line.

[0057] As shown in Figure 3 and Figure 4As shown, the base material can include the auxiliary strip 5 and the filter sheet 1, which is a slit strip-shaped sheet at this time, different from the aforementioned whole plate, 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 arranged 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 the opening 3, that is, the preparation of the base material is completed. The improvement of forming more openings 3 on the filter sheet 1 by cooperating the auxiliary strip 5 with the filter sheet 1 and other processing methods belongs to the conventional improvement of the structure of the present application, and should be included in the technical solution of the present application.

[0058] Further, the auxiliary strip 5 can be at least one of paper, non-woven fabric, polymer net, film, and foam, and can be mixed and arranged with 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.

[0059] According to the foregoing description, the present application provides specific embodiments that can be implemented, for example as follows:

[0060] Embodiment one:

[0061] The processing flow can be divided into: 1 punching → 2 gluing → 3 pre-cooling, reheating → 4 wave collecting

[0062] 1. Punching:

[0063] The coiled sheet material (the sheet material itself can be used as a filter sheet 1, that is, it can play a filtering function) is punched into a base material with openings 3. Without considering the thickness of the sheet material itself, the corresponding size of the opening 3 in the length direction of the sheet material (i.e. the base material) must be greater than or equal to the interlayer distance of the through-hole filter to be prepared, that is, the size of the opening 3 in this direction needs to be greater than or equal to the height of the filter through-hole 6 of the through-hole filter to be prepared. In order to make the sheet material more easily bent when wave collecting, it is also necessary to press the intermittent connection of the dashed line as the bending line 4 in the punching process. The distance between the two bending lines 4 on the same side of the opening 3 is a group, and the distance between the groups, that is, the thickness of the through-hole filter to be prepared.

[0064] The corresponding size of the opening 3 in the width direction of the sheet material is the width of each filter through-hole 6 of the through-hole filter to be prepared.

[0065] 2. Gluing:

[0066] After stamping, the base material is glued, and the intermittent glue is applied. The glue position can be referred to Figure 1 and Figure 2 As shown, glue is applied on both sides, but the two gluing methods are distinguished. One is to glue the corresponding positions on both sides, and the other is to misalign the gluing on both sides. The glue is intermittent. After gluing, a glue line is formed, and the glue line is bonded to form a support glue strip 2. The support glue strip 2 functions to support and fix the through-hole filter. The height of the support glue strip 2 (or referred to as the gluing thickness) needs to be slightly higher than half of the desired interlayer spacing of the through-hole filter. The glue lines on both sides overlap each other and are extruded by a certain pressure to reach the width of the interlayer spacing, thereby achieving firm bonding.

[0067] 3. Pre-cooling, reheating:

[0068] 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 bond with each other, facilitating mutual bonding during the wave collection process.

[0069] 4. Wave collection:

[0070] Referring to Figure 5 and Figure 6 , the wave collection forms a positive and negative bending wave shape. It should be noted that Figure 5 and Figure 6 The support glue strip 2 shown is only a schematic position and does not represent the specific structure size. Since the bending modulus of the sheet material at the dashed line position (bending line 4) is greatly weakened during stamping, the wave collection will bend at the dashed line position, so the wave collection can be performed as expected.

[0071] Example two:

[0072] The processing flow can be divided into: 1. Gluing and pulling the auxiliary strip → 2. Sticking the sheet material → 3. Gluing → 4. Pre-cooler, reheating → 5. Wave collection

[0073] 1. Gluing and pulling the auxiliary strip:

[0074] A thin paper with high tensile strength but low bending modulus, a polymer film, a net, etc. is selected as the auxiliary strip 5, which is glued and pulled so that it can be fixed with the sheet material (as a filter sheet 1).

[0075] 2. Sticking the sheet material:

[0076] The sheet material is stuck 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 interlayer spacing of the through-hole filter.

[0077] 3. Gluing, gluing:

[0078] Gluing position reference Figure 3 and Figure 4 As shown in FIGS. 1 and 2, gluing is performed on both the front and back surfaces, but two gluing methods are distinguished, one is that gluing is performed on corresponding positions of the front and back surfaces, and the other is that gluing is performed on staggered positions of the front and back surfaces, and the gluing is intermittent. The function of the glue line is to support and fix the filter. After gluing, the glue line is formed, and the glue line is bonded to form a support glue strip 2. The function of the support glue strip 2 is to support and fix the through-hole filter. The height (or referred to as the gluing thickness) of the support glue strip 2 needs to be slightly higher than half of the desired interlayer spacing of the through-hole filter. After the glue lines on both sides overlap each other and are extruded by a certain pressure, the width of the interlayer spacing is reached, and thus firm bonding can be achieved.

[0079] 4. Pre-cooling and reheating: The pre-cooling of the glue line is to obtain the stability of the size and the strength in this process, and the reheating is to give the surface layer of the glue line the ability to bond with each other, which facilitates mutual bonding during the wave collecting process.

[0080] 5. Wave collecting:

[0081] Reference Figure 5 and Figure 6 During wave collecting, a wave shape with positive and negative bending is formed. It should be noted that Figure 5 and Figure 6 The support glue strip 2 shown in FIGS. 3 and 4 is only a schematic position and does not represent the specific structural size. Since the bending modulus of the auxiliary strip 5 is very small, and the bending modulus of the corresponding position of the sheet material is much larger, during wave collecting, bending will occur at the position where the sheet material is not bonded, and the support glue strip 2 formed by the glue line will expand the interlayer spacing, thereby obtaining the through-hole filter.

[0082] In the present application, specific examples are applied to explain the principles and implementation modes of the present application. The above examples are only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation mode and application range. In conclusion, the content of the present specification should not be understood as a limitation of the present application.

Claims

1. A method of manufacturing a via filter structure, characterized by, The application relates to a preparation method of a filter material, and discloses the following contents. A substrate is prepared, the substrate has a matrix distribution of openings, and the substrate on both sides of the openings in the length direction of the substrate serves as a filter sheet; A support adhesive tape is coated, the support adhesive tape is parallel to the length direction of the substrate, and in the width direction of the substrate, the first area between adjacent openings and the second area between adjacent openings in the length direction of the substrate are located at the intersection of the first area and the second area; The support adhesive tape is pre-cooled to ensure the strength of the support adhesive tape and the stability of the size; The support adhesive tape is re-heated, the substrate is collected, the substrate is alternately bent in the front and back directions to form a wave shape, and the filter sheet and the openings form filter through holes; The support adhesive tape connects adjacent filter sheets.

2. The method of claim 1, wherein: The substrate adopts an integral filter sheet, and the openings are formed on the filter sheet.

3. The method of claim 2, wherein: A bending line is processed, the bending line is located on both sides of the openings in the length direction of the substrate, and the bending line is a discontinuous virtual line or a continuous indentation line.

4. The method of claim 1, wherein: The substrate comprises an auxiliary strip and a filter sheet, the auxiliary strip is arranged in parallel, the filter sheet is distributed at intervals in the length direction of the auxiliary strip and is bonded on the auxiliary strip, and the auxiliary strip and the filter sheet form a region as the opening.

5. The method of claim 4, wherein: The auxiliary strip adopts at least one of paper, non-woven fabric, polymer net, film and foam.

6. A via filter structure, characterized by: The preparation method in any one of claims 1-5 is adopted, the filter sheet is distributed at intervals in the thickness direction of the filter sheet, the region between adjacent filter sheets serves as a filter channel, the support adhesive tape is arranged in parallel and at intervals in the filter channel, and the region between the support adhesive tapes in the same filter channel serves as a filter through hole.

7. The via filter structure of claim 6, wherein: The support adhesive tapes are arranged at the same positions on the front and back surfaces of the filter sheet, and the filter through holes of adjacent filter channels are arranged in alignment.

8. The via filter structure of claim 6, wherein: The support adhesive tapes are arranged at different positions on the front and back surfaces of the filter sheet, and the filter through holes of adjacent filter channels are arranged in misalignment.

9. The via filter structure of claim 6, wherein: The filter sheet adopts at least one of filter paper containing an adsorbent, non-woven fabric, carbon cloth, foam, electret film and polymer covered electrode sheet.

10. The via filter structure of claim 6, wherein: The support adhesive tape adopts at least one of EVA, EPDM and PO hot melt polymer materials.

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