Anti-static non-woven fabric filtering structure

Abstract

The utility model discloses an anti-static non-woven fabric filtering structure which comprises a non-woven fabric layer, a conductive coating arranged on one side of the non-woven fabric layer and a plurality of conductive yarns, and the conductive yarns extend into the non-woven fabric layer and are connected with the conductive coating. According to the anti-static filtering structure, electrostatic particles generated in the filtering structure are timely and effectively diffused and conducted under the combined action of the conductive yarns in the non-woven fabric layer and the conductive plating layer on the non-woven fabric layer after the conductive yarns are connected with the conductive plating layer, so that the filtering structure has excellent anti-static performance.

Description

Technical Field

[0001] The utility model relates to the technical field of filter materials, in particular to an antistatic nonwoven filter structure. Background Art

[0002] In related industries such as dust manufacturing and lithium battery manufacturing, the filter material needs to have a certain conductive property when filtering materials or materials to prevent static electricity from being generated, avoid static electricity generated by mutual collision and friction between particles during the filtration process, and avoid flammable and explosive safety hazards caused by high concentration of dust environment.

[0003] Due to its inherent porous properties, non-woven fabrics can be used in filter materials. By performing certain antistatic finishing on the non-woven fabrics, the conductive properties in the filtration process can be achieved, which can avoid flammable and explosive hazards. For example, an antistatic non-woven fabric for medical fabrics with application number 202320449730.4 discloses a wear-resistant layer, a meltblown non-woven inner layer, an antistatic layer and a skin-friendly layer that are stacked in sequence. The antistatic layer is woven from warp conductive fibers and weft conductive fibers. The antistatic layer can prevent static electricity from being generated by repeated friction or rubbing during use. However, the antistatic layer and the meltblown non-woven inner layer are stacked and do not extend to the meltblown non-woven inner layer. Therefore, the static electricity generated during the filtration process in the non-woven layer is not well diffused and conducted. Utility Model Content

[0004] The purpose of the utility model is to provide an antistatic non-woven filter structure, which can promptly and effectively diffuse and conduct the electrostatic particles generated in the filter structure through the conductive yarn located in the non-woven layer and the conductive coating on the non-woven layer. This makes the filter structure have excellent antistatic performance.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an anti-static non-woven fabric filter structure, including a non-woven fabric layer and a conductive coating arranged on one side of the non-woven fabric layer. The anti-static non-woven fabric filter structure also includes a plurality of conductive yarns, which extend into the non-woven fabric layer and are connected to the conductive coating.

[0006] As a further optimization, the contact portion between the conductive yarn and the conductive coating is bent, which can provide a larger contact surface and improve conductivity.

[0007] As a further optimization, the conductive yarn and the non-woven fabric layer are arranged vertically.

[0008] As a further optimization, the density of the conductive yarn on the non-woven fabric layer is 5-20 pieces / cm 2 .

[0009] As a further optimization, the antistatic non-woven fabric filter structure also includes a conductive fabric layer, which is attached to the side of the non-woven fabric layer away from the conductive coating layer, and can further improve the conductor performance of the non-woven fabric layer.

[0010] As a further optimization, the conductive yarn is in contact with the conductive fabric layer to achieve conductivity of the entire filtering structure in three-dimensional space.

[0011] As a further optimization, the conductive fabric layer includes a plurality of interwoven warp yarns and weft yarns, and its woven-like form can have better strength and can achieve a certain load-bearing effect.

[0012] As a further optimization, the conductive fabric layer and the non-woven fabric layer are bonded together by a conductive hot-melt adhesive layer arranged in a matrix shape, which can improve the strength of the non-woven fabric layer.

[0013] As a further optimization, the conductive coating is made of aluminum, copper, silver or graphite, and preferably aluminum powder is used to form the coating on the non-woven fabric layer.

[0014] As a further optimization, the conductive yarn and / or the conductive fabric layer is made of conductive silver fiber. The conductive silver fiber can be a blend of silver fiber and other fibers. The silver fiber can also achieve a certain antibacterial property.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The conductive yarn in the non-woven fabric layer and the conductive coating on the non-woven fabric layer work together to timely and effectively diffuse and conduct the electrostatic particles generated in the filter structure, so that the filter structure has excellent anti-static performance;

[0017] 2. The conductive fabric layer located on the other side of the non-woven fabric layer and connected to the conductive yarn can improve the conductive performance and increase the strength of the filtering structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the explosion structure of the utility model.

[0019] Figure 2 It is a cross-sectional view of the utility model.

[0020] Figure 3 The figure is a schematic diagram of the explosion structure of another embodiment of the utility model. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figures 1 to 2 As shown, an antistatic non-woven fabric filter structure includes a non-woven fabric layer 10 and a conductive coating 20 arranged on one side of the non-woven fabric layer. The antistatic non-woven fabric filter structure also includes a plurality of conductive yarns 31, which extend into the non-woven fabric layer 10 and are connected to the conductive coating 20.

[0023] In the present invention, in the process of filtering materials (such as powder materials) by the non-woven fabric layer 10, the electrostatic particles generated and accumulated between the materials due to friction and collision can be conducted through the conductive coating 20 connected to the non-woven fabric layer 10 with a large area. In addition, since the conductive yarn 31 is implanted in the non-woven fabric layer, it can also have excellent diffusion and conduction effects on the electrostatic particles generated by the friction and collision between the materials inside the non-woven fabric layer 10, or the friction and collision between the materials and the non-woven fabric layer 10 during the filtration process. That is, the conductive yarn 31 can effectively transfer the electrostatic particles generated in the non-woven fabric layer 10 to the conductive coating 20 to avoid the accumulation of static electricity in the non-woven fabric layer 10. In summary, the static electricity generated in the filter material (non-woven fabric layer 10) can be timely and effectively diffused and conducted through the conductive yarn 31 located in the non-woven fabric layer 10 and the joint action of the conductive coating 20 on the non-woven fabric layer 10, so that the filter material has excellent anti-static properties and can avoid safety hazards caused by excessive accumulation of static electricity.

[0024] For implanting the conductive yarn 31 into the non-woven fabric layer 10, it can be achieved by a method similar to electrostatic flocking, or by pre-implanting a longer conductive yarn into the material layer in the non-woven fabric layer 10 and then fixing it by acupuncture; of course, when it is not necessary to implant more conductive yarns 31 into the non-woven fabric layer 10, it can be implanted manually one by one or in multiple ways, for example, a single conductive yarn can be implanted into the non-woven fabric layer 10 by acupuncture.

[0025] Furthermore, the junction between the conductive yarn 31 and the conductive coating 20 is bent. Specifically, the conductive yarn 31 can be first implanted into the non-woven fabric layer 10, and then the conductive coating 20 is implemented on one side of the non-woven fabric layer 10. The conductive yarn is bent and adhered to the non-woven fabric layer 10 through the action of the coating particles on the conductive yarn, which can increase the area of ​​static electricity diffusion and conduction, thereby increasing the static electricity conduction speed and improving the anti-static ability.

[0026] Inside the non-woven fabric layer 10, the conductive yarn 31 is preferably arranged vertically to the non-woven fabric layer 10, which can avoid the conductive yarns 31 from intersecting due to mutual inclination, and can also make the conductive yarns 31 regularly arranged in the non-woven fabric layer 10, which helps to achieve uniform conduction.

[0027] The density of the conductive yarn 31 on the non-woven fabric layer 10 is 5-20 pieces / cm 2, when the quantity can have excellent conductive effect without affecting the filtering performance.

[0028] Combination Figure 3 As shown, in another embodiment of the utility model, the antistatic nonwoven filter structure also includes a conductive fabric layer 40, which is attached to the side of the nonwoven layer 10 away from the conductive coating 20. The conductive fabric layer 40 can further provide a diffusion path for electrostatic particles in the process of allowing the material to pass through it and enter the nonwoven layer 10, thereby improving the antistatic performance. Based on the above configuration, the conductive yarn 31 is in contact with the conductive fabric layer 40, so that the inner conductive layer 30 is formed by a plurality of conductive yarns 31. After passing through the nonwoven layer 10, the two sides are respectively connected to the conductive coating 20 and the conductive fabric layer 40, forming a conductive network in a three-dimensional space, which can have a better antistatic effect.

[0029] Preferably, the conductive fabric layer 40 includes a plurality of interwoven warp yarns 41 and weft yarns 42. The conductive fabric layer 40 has a structure similar to that of a woven fabric, and has better fastness under the premise that there are larger gaps between adjacent yarns than the non-woven fabric 10. When combined with the non-woven fabric layer 10, the antistatic non-woven fabric filter structure can have better strength without affecting the filtering performance.

[0030] Specifically, the conductive fabric layer 40 and the non-woven fabric layer 10 are bonded together through a conductive hot melt adhesive layer arranged in a matrix shape, that is, hot melt adhesive is coated at the junction of the warp yarn 41 and the weft yarn 42 of the conductive fabric layer 40, and bonding is performed through the formed hot melt adhesive layer; of course, the hot melt adhesive layer also needs to have good conductive properties.

[0031] In the utility model, the conductive coating 20 is made of aluminum, copper, silver or graphite, preferably aluminum, which has excellent conductive properties, and the formed coating is not easy to disperse in water, and can better maintain its coating structure; the conductive yarn 31 and the conductive fabric layer 40 are made of conductive silver fiber, wherein the conductive fabric layer 40 can be blended to add polyester filaments to ensure the strength of the warp yarn 41 and the weft yarn 42 in the conductive fabric layer 40.

[0032] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An antistatic nonwoven fabric filter structure, comprising a nonwoven fabric layer and a conductive coating layer disposed on one side of the nonwoven fabric layer, characterized in that: It also includes a plurality of conductive yarns, which extend into the non-woven fabric layer and are connected to the conductive plating layer.

2. The antistatic nonwoven fabric filter structure according to claim 1, characterized in that: The contacting portion between the conductive yarn and the conductive coating is in a bent shape.

3. The antistatic nonwoven fabric filter structure according to claim 1 or 2, characterized in that: The conductive yarn and the non-woven fabric layer are arranged vertically.

4. The antistatic nonwoven fabric filter structure according to claim 1, characterized in that: The density of the conductive yarn on the non-woven fabric layer is 5-20 pieces / cm 2 .

5. The antistatic nonwoven fabric filter structure according to claim 1, characterized in that: It also includes a conductive fabric layer, which is attached to a side of the non-woven fabric layer away from the conductive coating.

6. The antistatic nonwoven fabric filter structure according to claim 5, characterized in that: The conductive yarn is in contact with the conductive fabric layer.

7. The antistatic nonwoven fabric filter structure according to claim 5, characterized in that: The conductive fabric layer includes a plurality of warp yarns and weft yarns interwoven with each other.

8. The antistatic nonwoven fabric filter structure according to any one of claims 5 to 7, characterized in that: The conductive fabric layer and the non-woven fabric layer are bonded together by a conductive hot-melt adhesive layer arranged in a matrix shape.

9. The antistatic nonwoven fabric filter structure according to claim 1, characterized in that: The conductive coating is made of aluminum, copper, silver or graphite.

10. The antistatic nonwoven fabric filter structure according to claim 1 or 9, characterized in that: The conductive yarn and / or the conductive fabric layer is made of conductive silver fiber.

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