Composite electrostatic cotton filter material

Abstract

The utility model provides a composite electrostatic cotton filter material. The composite electrostatic cotton filter material comprises a gradient pre-filtering layer, an electrostatic filtering layer and a reinforcing layer which are arranged in sequence, the static filtering layer is in a sinusoidal waveform, an outer supporting layer is arranged between the gradient pre-filtering layer and the static filtering layer, an inner supporting layer is arranged between the gradient pre-filtering layer and the reinforcing layer, and the side, close to the static filtering layer, of the outer supporting layer and the side, close to the static filtering layer, of the inner supporting layer are in sinusoidal waveforms matched with the static filtering layer; according to the utility model, through the sinusoidal waveform electrostatic filtering layer, the filtering area of the electrostatic filtering layer in the unit filtering material area can be increased, the electrostatic adsorption area can be increased, and the electrostatic adsorption capacity of dust can be improved; the side, close to the electrostatic filtering layer, of the outer supporting layer and the side, close to the electrostatic filtering layer, of the inner supporting layer are both sinusoidal waveforms matched with the electrostatic filtering layer, the outer supporting layer and the inner supporting layer support the electrostatic filtering layer on the two sides of the electrostatic filtering layer, the sinusoidal waveforms are kept, and it is guaranteed that the electrostatic adsorption layer has the stable and large electrostatic adsorption area.

Description

Technical Field

[0001] This utility model belongs to the field of filter material technology, specifically relating to a composite electrostatic cotton filter material. Background Technology

[0002] Cotton filter material is a type of filter material used in respiratory protective equipment. It mainly uses its special material and structure to intercept impurities, dust, bacteria and other particulate matter in the air, thereby purifying the air.

[0003] In the prior art, Chinese utility model patent document with authorization announcement number CN211536869U discloses a composite electrostatic cotton filter material, including a first PP nonwoven fabric layer, a charged fiber cotton layer with uniformly arranged rivets on its surface, and a second PP nonwoven fabric layer. The top of the charged fiber cotton layer is covered by the first PP nonwoven fabric layer, and the bottom of the charged fiber layer is covered by the second PP nonwoven fabric layer. However, the area of ​​the charged fiber cotton layer is limited by the area of ​​the cotton filter material, and its electrostatic adsorption capacity for dust is limited.

[0004] Therefore, it is necessary to design a composite electrostatic cotton filter material that increases the electrostatic adsorption area and enhances the electrostatic adsorption capacity of dust to solve the current technical problems. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, this utility model provides a composite electrostatic cotton filter material that increases the electrostatic adsorption area and improves the electrostatic adsorption capacity of dust.

[0006] The technical solution of this utility model is as follows: a composite electrostatic cotton filter material, comprising a gradient pre-filtration layer, an electrostatic filter layer and a reinforcing layer arranged sequentially; the electrostatic filter layer has a sinusoidal waveform, an outer support layer is provided between the gradient pre-filtration layer and the electrostatic filter layer, and an inner support layer is provided between the gradient pre-filtration layer and the reinforcing layer; the outer support layer and the inner support layer on the side closest to the electrostatic filter layer both have a sinusoidal waveform that matches the electrostatic filter layer.

[0007] Furthermore, the outer support layer and the inner support layer are uniformly provided with support channels, and the interior of the support channels is filled with activated carbon.

[0008] Furthermore, the gradient pre-filter layer has a first pre-filter layer and a second pre-filter layer; the first pre-filter layer has a pore size of 50 μm and a thickness of 1~2 mm; the second pre-filter layer has a pore size of 30 μm and a thickness of 1~2 mm.

[0009] Furthermore, an acid and alkali resistant layer is provided on the side of the first pre-filter layer opposite to the second pre-filter layer, and the acid and alkali resistant layer is a polytetrafluoroethylene filter membrane.

[0010] Furthermore, the electrostatic filter layer is electrostatic cotton, and the pore size of the electrostatic filter layer is 20~30μm and the thickness is 1~3mm.

[0011] Furthermore, the reinforcing layer is a PET mesh fabric, and the thickness of the reinforcing layer is 1 mm.

[0012] Furthermore, a graphene coating is provided on the reinforcing layer, and the thickness of the graphene coating is 0.1 mm.

[0013] Furthermore, a skin-friendly layer is provided on the side of the reinforcing layer opposite to the gradient pre-filter layer, and the thickness of the skin-friendly layer is 0.1~0.2mm.

[0014] The beneficial effects of this utility model are:

[0015] (1) In this utility model, by using an electrostatic filter layer with a sinusoidal waveform, the filter area of ​​the electrostatic filter layer per unit filter material area can be increased, the electrostatic adsorption area can be increased, and the electrostatic adsorption capacity of dust can be improved.

[0016] (2) The outer support layer and the inner support layer are both sinusoidal waveforms that match the electrostatic filter layer. The outer support layer and the inner support layer support the electrostatic filter layer on both sides to maintain the sinusoidal waveform and ensure that it has a stable and large electrostatic adsorption area. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the composite electrostatic cotton filter material in this utility model.

[0018] Figure 2 This is a schematic diagram of the gradient pre-filtering layer in this utility model. Detailed Implementation

[0019] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are not intended to limit the present invention or its application or use in any way. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0020] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 and 2 As shown, the composite electrostatic cotton filter material includes a gradient pre-filtration layer 1, an electrostatic filter layer 2, and a reinforcing layer 5 arranged sequentially. The electrostatic filter layer 2 has a sinusoidal waveform. An outer support layer 3 is provided between the gradient pre-filtration layer 1 and the electrostatic filter layer 2, and an inner support layer 4 is provided between the gradient pre-filtration layer 1 and the reinforcing layer 5. The sides of the outer support layer 3 and the inner support layer 4 closest to the electrostatic filter layer 2 are both sinusoidal waveforms matching the electrostatic filter layer 2. In this embodiment, the sinusoidal waveform of the electrostatic filter layer 2 can increase the filtration area of ​​the electrostatic filter layer 2 per unit filter material area, increase the electrostatic adsorption area, and improve the electrostatic adsorption capacity of dust. The sides of the outer support layer 3 and the inner support layer 4 closest to the electrostatic filter layer 2 are both sinusoidal waveforms matching the electrostatic filter layer 2. The outer support layer 3 and the inner support layer 4 support the electrostatic filter layer 2 on both sides to maintain its sinusoidal waveform and ensure that it has a stable and large electrostatic adsorption area.

[0022] In some embodiments, support channels 6 are uniformly formed on the outer support layer 3 and the inner support layer 4, and the interior of the support channels 6 is filled with activated carbon 7. The activated carbon 7 can enhance the support strength of the electrostatic filter layer 2, making the electrostatic filter layer 2 less prone to large deformation and ensuring that it has a stable and large electrostatic adsorption area. The activated carbon 7 filled inside the support channels 6 can adsorb odors in the air. Specifically, the activated carbon 7 is coconut shell activated carbon. In addition, the outer support layer 3 and the inner support layer 4 themselves also have a certain effect of filtering particulate matter.

[0023] In some embodiments, the gradient pre-filter layer 1 has a first pre-filter layer 11 and a second pre-filter layer 12; the first pre-filter layer 11 has a pore size of 50 μm and a thickness of 1~2 mm; the second pre-filter layer 12 has a pore size of 30 μm and a thickness of 1~2 mm; the gradient pre-filter layer 1 can form a gradient pore size from 50 μm to 30 μm, thereby reducing the initial piezoresistive pressure.

[0024] In some embodiments, an acid and alkali resistant layer 13 is provided on the side of the first pre-filter layer 11 opposite to the second pre-filter layer 12. The acid and alkali resistant layer 13 is a polytetrafluoroethylene (PTFE) filter membrane. The PTFE filter membrane has good acid and alkali resistance properties, which can improve the acid and alkali resistance properties of the filter material.

[0025] In some embodiments, the electrostatic filter layer 2 is electrostatic cotton, with a pore size of 20~30μm and a thickness of 1~3mm. The electrostatic cotton is woven from charged fibers and actively adsorbs particles such as dust with opposite charges or neutrality through charged positioning, significantly improving dust collection efficiency.

[0026] In some embodiments, the reinforcing layer 5 is a PET mesh fabric with a thickness of 1 mm; wherein, the reinforcing layer 5 has good mechanical strength, and provides mechanical support for the filter material to prevent structural collapse.

[0027] In some embodiments, a graphene coating is provided on the reinforcing layer 5, the thickness of which is 0.1 mm; wherein, the graphene provides antibacterial properties, enabling the reinforcing layer 5 to not only provide continued support but also provide antibacterial properties.

[0028] In some embodiments, a skin-friendly layer 8 is provided on the side of the reinforcing layer 5 that is away from the gradient pre-filter layer 1. The thickness of the skin-friendly layer 8 is 0.1~0.2mm. Specifically, the skin-friendly layer 8 is a layered structure made of fluffy cotton, which is not only soft and skin-friendly, but also has a certain moisture absorption effect.

[0029] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0030] The embodiments described above only illustrate some implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A composite electrostatic cotton filter material, characterized in that: It includes a gradient pre-filter layer, an electrostatic filter layer, and a reinforcement layer arranged sequentially; The electrostatic filter layer has a sinusoidal waveform. An outer support layer is provided between the gradient pre-filter layer and the electrostatic filter layer. An inner support layer is provided between the gradient pre-filter layer and the reinforcing layer. The side of the outer support layer and the inner support layer closest to the electrostatic filter layer is a sinusoidal waveform that matches the electrostatic filter layer.

2. The composite electrostatic cotton filter material according to claim 1, characterized in that: The outer support layer and the inner support layer are uniformly provided with support channels, and the interior of the support channels is filled with activated carbon.

3. The composite electrostatic cotton filter material according to claim 1, characterized in that: The gradient pre-filter layer has a first pre-filter layer and a second pre-filter layer; the first pre-filter layer has a pore size of 50 μm and a thickness of 1~2 mm. The second pre-filter layer has a pore size of 30 μm and a thickness of 1~2 mm.

4. The composite electrostatic cotton filter material according to claim 3, characterized in that: An acid and alkali resistant layer is provided on the side of the first pre-filter layer opposite to the second pre-filter layer, and the acid and alkali resistant layer is a polytetrafluoroethylene filter membrane.

5. The composite electrostatic cotton filter material according to claim 1, characterized in that: The electrostatic filter layer is electrostatic cotton, with a pore size of 20~30μm and a thickness of 1~3mm.

6. The composite electrostatic cotton filter material according to claim 1, characterized in that: The reinforcing layer is made of PET mesh fabric, and the thickness of the reinforcing layer is 1 mm.

7. The composite electrostatic cotton filter material according to claim 6, characterized in that: The reinforcing layer is provided with a graphene coating, the thickness of which is 0.1 mm.

8. The composite electrostatic cotton filter material according to claim 1, characterized in that: A skin-friendly layer is provided on the side of the reinforcing layer opposite to the gradient pre-filter layer, and the thickness of the skin-friendly layer is 0.1~0.2mm.

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