Filter material and method for producing filter material

Abstract

The invention relates to a filter material and a method for manufacturing the filter material. The filter material (1000) comprises: a support layer (501); the first adsorption layer (601) is arranged on the supporting layer (501), and the first adsorption layer (601) comprises an adsorption layer formed by mixing activated carbon particles and adhesive particles; the second adsorption layer (602) is arranged on the first adsorption layer (601), and the second adsorption layer (602) comprises an activated carbon layer used for adsorbing specific gas with peculiar smell or harmful gas. According to the filter material, by arranging the adsorption layers with different structures, compared with a single adsorption layer, the adsorption range is expanded, and the overall filtering effect of the filter material is improved.

Description

Technical Field

[0001] This application relates to a filter medium and a method for manufacturing the filter medium. Background Art

[0002] Filter media containing activated carbon have been widely used.

[0003] In the filter media of the prior art, as Figure 1 shown, it has a three-layer structure, including a support layer, a filtration layer, and an adsorption layer sandwiched between the support layer and the filtration layer. This adsorption layer is usually formed by mixing activated carbon powder and rubber powder and then heating. Its composition is single and the structure is simple, and it has an adsorption effect on various odorous gases or harmful gases; however, when a relatively high adsorption requirement for a specific gas is needed, the usual treatment method is to mix modified activated carbon for adsorbing the specific gas into the adsorption layer. However, with the further improvement of the market's requirements for the adsorption performance of filter media, the applicant has found that the filter media formed in the above manner cannot meet the high requirements of the market for the adsorption energy of filter media.

[0004] Therefore, it is necessary to further improve the structure of the filter medium to improve the adsorption capacity of the filter medium. Summary of the Invention

[0005] According to one aspect of the present application, there is provided a filter medium, including: a support layer; a first adsorption layer disposed on the support layer, the first adsorption layer including an adsorption layer formed by mixing activated carbon particles and adhesive particles; a second adsorption layer disposed on the first adsorption layer, the second adsorption layer including an activated carbon layer for adsorbing specific odorous gases or harmful gases.

[0006] In this way, by providing an adsorption layer formed by mixing activated carbon particles and adhesive particles and an adsorption layer with an activated carbon layer, the adsorption range is expanded relative to a single adsorption layer, and the overall filtration effect of the filter medium is improved.

[0007] Further, the thickness of the first adsorption layer is greater than the thickness of the second adsorption layer.

[0008] In this way, by setting the thickness of the first adsorption layer to be greater than the thickness of the second adsorption layer, the adsorption capacity of the adsorption layer formed by mixing activated carbon particles and adhesive particles is increased.

[0009] Further, a filtration layer is disposed on the outermost adsorption layer, and the filtration layer is used for filtering particulate pollutants.

[0010] In this way, by providing a pre-set filtration layer, particulate pollutants in the air can be filtered out.

[0011] Further, the activated carbon particles in the first adsorption layer are unmodified activated carbon or contain modified activated carbon.

[0012] In this way, by setting unmodified activated carbon or containing modified activated carbon, effective physical adsorption can be carried out.

[0013] Further, in the first adsorption layer, the first adsorption layer is formed by dispersing activated carbon particles in heated and molten adhesive particles.

[0014] In this way, by dispersing activated carbon particles in heated and molten adhesive particles, the structure of the activated carbon particles in the first adsorption layer is more stable.

[0015] Further, the activated carbon in the second adsorption layer is modified activated carbon for adsorbing sulfur dioxide or hydrogen sulfide.

[0016] In this way, by setting modified activated carbon, sulfur dioxide or hydrogen sulfide in the air can be adsorbed.

[0017] Further, a spray adhesive layer is provided between the second adsorption layer and the first adsorption layer, and the activated carbon layer in the second adsorption layer adheres to the first adsorption layer through this spray adhesive layer.

[0018] In this way, by setting the spray adhesive layer, the activated carbon layer can be firmly fixed in the filter medium.

[0019] Further, the filter medium further includes a third adsorption layer provided on the second adsorption layer, and the third adsorption layer includes an activated carbon layer for adsorbing specific odorous gases or harmful gases.

[0020] In this way, by providing the third adsorption layer on the second adsorption layer, the adsorption effect can be further enhanced.

[0021] Further, the gas adsorbed by the activated carbon layer in the third adsorption layer is the same as or different from the gas adsorbed by the activated carbon layer in the second adsorption layer.

[0022] In this way, by providing a third adsorption layer that is the same as or different from the gas adsorbed by the activated carbon layer in the second adsorption layer, the adsorption effect of the second adsorption layer can be enhanced, or the adsorption range of the second adsorption layer can be expanded.

[0023] Further, a spray adhesive layer is provided between the third adsorption layer and the second adsorption layer, and the activated carbon layer in the third adsorption layer adheres to the second adsorption layer through this spray adhesive layer.

[0024] In this way, by setting this spray adhesive layer, the activated carbon layer of the third adsorption layer can be firmly fixed in the filter medium

[0025] According to another aspect of the present application, there is also provided a method for manufacturing a filter medium, the method comprising the following steps: providing a support layer; providing a first adsorption layer on the support layer, the first adsorption layer comprising an adsorption layer formed by mixing activated carbon particles and adhesive particles; and providing a second adsorption layer on the first adsorption layer, the second adsorption layer comprising an activated carbon layer for adsorbing specific odorous gases or harmful gases.

[0026] Further, the thickness of the first adsorption layer is set to be greater than the thickness of the second adsorption layer.

[0027] Further, the method further comprises the following steps: providing a filter layer on the uppermost adsorption layer, the filter layer being used for filtering particulate pollutants in the gas.

[0028] Further, the activated carbon particles in the first adsorption layer are unmodified activated carbon or contain modified activated carbon.

[0029] Further, the first adsorption layer is formed by dispersing activated carbon particles in heated and molten adhesive particles.

[0030] Further, the activated carbon in the second adsorption layer is modified activated carbon for adsorbing sulfur dioxide or hydrogen sulfide.

[0031] Further, a spray adhesive layer is provided on the first adsorption layer, and then the activated carbon layer of the second adsorption layer is adhered to the spray adhesive layer.

[0032] Further, the method further comprises the following steps: providing a third adsorption layer on the second adsorption layer, the third adsorption layer comprising an activated carbon layer for adsorbing specific odorous gases or harmful gases.

[0033] Further, the gas adsorbed by the activated carbon layer in the third adsorption layer is the same as or different from the gas adsorbed by the activated carbon layer in the second adsorption layer.

[0034] Further, a spray adhesive layer is provided on the second adsorption layer, and then the activated carbon layer of the third adsorption layer is adhered to the spray adhesive layer.

[0035] In this way, through the above method, the filter medium of the present application having the above advantages can be obtained.

[0036] Through the filter medium of the present application, at least the following beneficial technical effects can be achieved.

[0037] First, by providing adsorption layers with different structures, the adsorption range is expanded relative to a single adsorption layer, improving the overall filtration effect of the filter medium.

[0038] Second, by dispersing activated carbon particles in heated and molten adhesive particles to form the adsorption layer, the concentration of activated carbon particles at one position is avoided.

[0039] Thirdly, by adhering the activated carbon layer to the spray adhesive layer, the use of the activated carbon mixing process is reduced, and the emission of harmful gases during the production process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features and advantages of the present application will become apparent from the following description of the preferred embodiments of the present application provided in the accompanying drawings and given by way of non-limiting indication. In the drawings:

[0041] Figure 1 is a filter medium of the prior art, showing that it has a three-layer structure.

[0042] Figure 2 is a schematic diagram of a filter medium according to an embodiment of the present application, in which a first adsorption layer and a second adsorption layer are shown.

[0043] Figure 3 is a schematic diagram of a filter medium according to another embodiment of the present application, in which a first adsorption layer, a second adsorption layer, and a third adsorption layer are shown.

[0044] Wherein, the reference numerals are as follows:

[0045] 1000, filter medium; 501, support layer; 601, first adsorption layer; 602, second adsorption layer; 603, third adsorption layer; 701, filter layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restrictive of the present application and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form.

[0048] Figure 1 is a filter medium of the prior art, showing that it has a three-layer structure. Figure 2 is a schematic diagram of a filter medium according to an embodiment of the present application, in which a first adsorption layer and a second adsorption layer are shown.

[0049] According to one aspect of the present application, a filter medium 1000 is provided, comprising: a support layer 501; a first adsorption layer 601 disposed on the support layer 501, the first adsorption layer 601 including an adsorption layer formed by mixing activated carbon particles and adhesive particles; a second adsorption layer 602 disposed on the first adsorption layer 601, the second adsorption layer 602 including an activated carbon layer for adsorbing specific odorous gases or harmful gases.

[0050] In this way, by providing an adsorption layer formed by mixing activated carbon particles and adhesive particles and an adsorption layer with an activated carbon layer, the adsorption range is expanded relative to a single adsorption layer, improving the overall filtration effect of the filter medium.

[0051] The thickness of the first adsorption layer 601 is greater than the thickness of the second adsorption layer 602. In this way, by setting the thickness of the first adsorption layer 601 to be greater than the thickness of the second adsorption layer 602, the adsorption capacity of the adsorption layer formed by mixing activated carbon particles and adhesive particles is increased.

[0052] A filter layer 701 is provided on the outermost adsorption layer, and the filter layer is used to filter particulate pollutants. The activated carbon particles in the first adsorption layer 601 are unmodified activated carbon or contain modified activated carbon. By providing a pre-filter layer, particulate pollutants in the air can be filtered out, and by providing unmodified activated carbon or modified activated carbon, effective physical adsorption can be carried out.

[0053] In the first adsorption layer 601, the first adsorption layer 601 is formed by dispersing activated carbon particles in heated and molten adhesive particles. By dispersing activated carbon particles in heated and molten adhesive particles, the structure of the activated carbon particles in the first adsorption layer is more stable.

[0054] The activated carbon in the second adsorption layer 602 is modified activated carbon for adsorbing sulfur dioxide or hydrogen sulfide. By providing modified activated carbon, sulfur dioxide or hydrogen sulfide in the air can be adsorbed.

[0055] A spray adhesive layer is provided between the second adsorption layer 602 and the first adsorption layer 601, and the activated carbon layer in the second adsorption layer 602 is adhered to the first adsorption layer 601 through the spray adhesive layer. By providing a spray adhesive layer, the activated carbon layer can be firmly fixed in the filter medium.

[0056] The filter medium 1000 further includes a third adsorption layer 603 disposed on the second adsorption layer 602, and the third adsorption layer 603 includes an activated carbon layer for adsorbing specific odorous gases or harmful gases. By providing the third adsorption layer 603 on the second adsorption layer 602, the adsorption effect can be further enhanced.

[0057] Figure 3 FIG. 2 is a schematic view of a filter medium according to another embodiment of the present application, which shows a first adsorption layer, a second adsorption layer, and a third adsorption layer. The gas adsorbed by the activated carbon layer in the third adsorption layer 603 is the same as or different from the gas adsorbed by the activated carbon layer in the second adsorption layer 602. By providing the third adsorption layer 603 with the gas adsorbed by the activated carbon layer in the second adsorption layer 602 being the same as or different from that, the adsorption effect of the second adsorption layer 602 can be enhanced, or the adsorption range of the second adsorption layer 602 can be expanded.

[0058] A spray adhesive layer is provided between the third adsorption layer 603 and the second adsorption layer 602, and the activated carbon layer in the third adsorption layer 603 adheres to the second adsorption layer 602 through this spray adhesive layer. By providing this spray adhesive layer, the activated carbon layer of the third adsorption layer 603 can be firmly fixed in the filter medium.

[0059] According to another aspect of the present application, a method for manufacturing a filter medium 1000 is also provided. The method includes the following steps: providing a support layer 501; providing a first adsorption layer 601 on the support layer 501, the first adsorption layer 601 including an adsorption layer formed by mixing activated carbon particles and adhesive particles; and providing a second adsorption layer 602 on the first adsorption layer 601, the second adsorption layer 602 including an activated carbon layer for adsorbing specific odorous gases or harmful gases. The thickness of the first adsorption layer 601 can be set to be greater than the thickness of the second adsorption layer 602.

[0060] The method further includes the following steps: providing a filter layer 701 on the topmost adsorption layer, the filter layer 701 being used to filter particulate pollutants in the gas. The activated carbon particles in the first adsorption layer 601 are unmodified activated carbon or contain modified activated carbon. The first adsorption layer 601 is formed by spreading activated carbon particles in heated and melted adhesive particles. The activated carbon in the second adsorption layer 602 is modified activated carbon for adsorbing sulfur dioxide or hydrogen sulfide.

[0061] The method further includes the following steps: providing a spray adhesive layer on the first adsorption layer 601, and then adhering the activated carbon layer of the second adsorption layer 602 to this spray adhesive layer.

[0062] The method further includes the following steps: providing a third adsorption layer 603 on the second adsorption layer 602, the third adsorption layer 603 including an activated carbon layer for adsorbing specific odorous gases or harmful gases. The gas adsorbed by the activated carbon layer in the third adsorption layer 603 is the same as or different from the gas adsorbed by the activated carbon layer in the second adsorption layer 602.

[0063] The method further includes the following steps: providing a spray adhesive layer on the second adsorption layer 602, and then adhering the activated carbon layer of the third adsorption layer 603 to this spray adhesive layer.

[0064] In this way, through the above method, the filter medium of the present application with the above advantages can be obtained.

[0065] Through the filter medium of the present application, at least the following beneficial technical effects can be achieved.

[0066] First, by setting adsorption layers with different structures, the adsorption range is expanded compared with a single adsorption layer, improving the overall filtration effect of the filter medium.

[0067] Second, by dispersing activated carbon particles in the heated and melted adhesive particles to form an adsorption layer, the concentration of activated carbon particles in one position is avoided.

[0068] Third, by adhering the activated carbon layer to the spray adhesive layer, the use of the activated carbon mixing glue process is reduced, and the emission of harmful gases during the production process is reduced.

[0069] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A filter medium (1000), characterized in that, Comprising: A support layer (501); A first adsorption layer (601), the first adsorption layer (601) being disposed on the support layer (501), the first adsorption layer (601) comprising an adsorption layer formed by mixing activated carbon particles and adhesive particles; A second adsorption layer (602), the second adsorption layer (602) being disposed on the first adsorption layer (601), the second adsorption layer (602) comprising an activated carbon layer for adsorbing specific malodorous gases or harmful gases.

2. The filter medium (1000) according to claim 1, characterized in that, The thickness of the first adsorption layer (601) is greater than the thickness of the second adsorption layer (602).

3. The filter medium (1000) according to claim 1, characterized in that, A filter layer (701) is disposed on the outermost adsorption layer, and the filter layer is used for filtering particulate pollutants.

4. The filter medium (1000) according to claim 2, characterized in that, The activated carbon particles in the first adsorption layer (601) are unmodified activated carbon or contain modified activated carbon.

5. The filter medium (1000) according to any one of claims 1 to 4, characterized in that, In the first adsorption layer (601), the first adsorption layer (601) is formed by dispersing the activated carbon particles in the heated and melted adhesive particles.

6. The filter medium (1000) according to claim 5, wherein, The activated carbon in the second adsorption layer (602) is modified activated carbon for adsorbing sulfur dioxide or hydrogen sulfide.

7. The filter medium (1000) according to claim 1, characterized in that, A spray adhesive layer is disposed between the second adsorption layer (602) and the first adsorption layer (601), and the activated carbon layer in the second adsorption layer (602) is adhered to the first adsorption layer (601) through the spray adhesive layer.

8. The filter medium (1000) according to claim 1, characterized in that, The filter medium (1000) further comprises a third adsorption layer (603) disposed on the second adsorption layer (602), the third adsorption layer (603) comprising an activated carbon layer for adsorbing specific malodorous gases or harmful gases.

9. The filter medium (1000) according to claim 8, characterized in that, The gas adsorbed by the activated carbon layer in the third adsorption layer (603) is the same as or different from the gas adsorbed by the activated carbon layer in the second adsorption layer (602).

10. The filter medium (1000) according to claim 8 or 9, characterized in that, A spray adhesive layer is disposed between the third adsorption layer (603) and the second adsorption layer (602), and the activated carbon layer in the third adsorption layer (603) is adhered to the second adsorption layer (602) through the spray adhesive layer.

11. A method for manufacturing a filter medium (1000), characterized in that, The method comprises the following steps: Setting a support layer (501); Setting a first adsorption layer (601) on the support layer (501), the first adsorption layer (601) comprising an adsorption layer formed by mixing activated carbon particles and adhesive particles; and Setting a second adsorption layer (602) on the first adsorption layer (601), the second adsorption layer (602) comprising an activated carbon layer for adsorbing specific malodorous gases or harmful gases.

12. The method according to claim 11, wherein The thickness of the first adsorption layer (601) is set to be greater than the thickness of the second adsorption layer (602).

13. The method according to claim 12, wherein The method further comprises the following step: setting a filter layer (701) on the uppermost adsorption layer, and the filter layer (701) is used for filtering particulate pollutants in the gas.

14. The method according to claim 11, wherein The activated carbon particles in the first adsorption layer (601) are unmodified activated carbon or contain modified activated carbon.

15. The method according to any one of claims 11 to 14, characterized in that The first adsorption layer (601) is formed by dispersing the activated carbon particles in the heated and melted adhesive particles.

16. The method according to claim 15, wherein The activated carbon in the second adsorption layer (602) is activated carbon that has been modified and is used for adsorbing sulfur dioxide or hydrogen sulfide.

17. The method according to claim 11, wherein A spray adhesive layer is provided on the first adsorption layer (601), and then the activated carbon layer of the second adsorption layer (602) is adhered to this spray adhesive layer.

18. The method according to claim 11, wherein The method further includes the following step: a third adsorption layer (603) is provided on the second adsorption layer (602), and the third adsorption layer (603) includes an activated carbon layer for adsorbing specific malodorous gases or harmful gases.

19. The method according to claim 18, wherein The activated carbon layer in the third adsorption layer (603) adsorbs the same or different gases as the activated carbon layer in the second adsorption layer (602).

20. The method according to claim 18 or 19, characterized in that A spray adhesive layer is provided on the second adsorption layer (602), and then the activated carbon layer of the third adsorption layer (603) is adhered to this spray adhesive layer.

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