CN215551430U

CN215551430U - Waterproof breathable net film

Info

Publication number: CN215551430U
Application number: CN202121556688.3U
Authority: CN
Inventors: 周凯
Original assignee: Jiangyin Weikang Textile Co ltd
Current assignee: Jiangyin Weikang Textile Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2022-01-18
Anticipated expiration: 2031-07-09

Abstract

The utility model relates to a waterproof breathable net film which comprises a filter layer and a gauze layer which are attached to each other, wherein the filter layer is of a microporous structure, and the microporous structure can allow gas to pass through but cannot allow liquid to pass through. In precision equipment such as mobile phones and the like, the waterproof breathable net film can be used for protecting internal components and filtering impurities in the air; and when splashing, the water drop is prevented from permeating, so that the normal operation of the internal components of the precision equipment is ensured.

Description

Waterproof breathable net film

Technical Field

The utility model relates to the field of filter cloth, in particular to a waterproof breathable net film.

Background

The requirement of the internal components of the precision equipment on the working environment is high, and in order to guarantee the normal operation of the internal components, the impurities in the equipment are required to be reduced, so that a good working environment is provided, and the normal operation of each component is guaranteed. Therefore, at the end of a precision machine, a screen is typically installed to filter the air.

For example, electroacoustic accessories in mobile phones are generally provided with dustproof screens, and when air flows, impurities in the air can be filtered by the waterproof screens, so that the electroacoustic accessories can work normally.

The existing dustproof screen is difficult to filter water drops when impurities are filtered, so that water can permeate into equipment and damage internal components when precision equipment such as a mobile phone contacts water.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned deficiencies of the prior art, it is an object of the present invention to provide a waterproof breathable web that solves one or more of the problems of the prior art.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a waterproof breathable net film comprises a filtering layer and a net gauze layer which are attached to each other, wherein the filtering layer is provided with a microporous structure, and the microporous structure can be used for gas to pass through but can not be used for liquid to pass through.

Furthermore, a hot melt adhesive layer is arranged between the gauze layer and the filter layer.

Furthermore, the hot melt adhesive layer is bonded with the filter layer and the gauze layer.

Furthermore, the gauze layer is attached to the filter layer, and a part of the gauze layer is embedded into the filter layer.

Further, a portion of the mesh layer penetrates the microporous structure.

Further, the pore size of the microporous structure is smaller than the diameter of water drops and larger than the diameter of gas molecules.

Further, the pore size of the microporous structure ranges from 0.1 μm to 1.5 μm.

Further, the gauze layer includes warp yarns and weft yarns which are interwoven.

Furthermore, the material of the filter layer is EPTFE.

Furthermore, the gauze layer is made of PU.

Compared with the prior art, the utility model has the following beneficial technical effects:

(one) compound filter layer on the gauze layer, and the microporous structure of filter layer can supply gas to pass through, and can't supply liquid to pass through, then the filter layer can hinder the drop of water to permeate through when filtering impurity to play waterproof effect, and gas can permeate through from the filter layer. In precision equipment such as mobile phones and the like, the net film can be used for protecting internal components and filtering impurities in the air; and when splashing, the water drop is prevented from permeating, so that the normal operation of the internal components of the precision equipment is ensured.

And (II) the gauze layer and the filter layer are adhered by the hot melt adhesive layer, so that the problem that the hot melt adhesive layer is not fully melted possibly occurs in the production process, the processed waterproof breathable net film is easy to delaminate, and the product quality is reduced. A part of the gauze layer is embedded into the filter layer, so that a hot melt adhesive layer can be omitted, and the waterproof breathable net film product is prevented from being layered, thereby ensuring the product quality.

And (III) compounding the gauze layer and the filter layer by utilizing an ultrasonic compounding process, wherein one part of the gauze layer can permeate into the microporous structure of the filter layer, so that one part of the gauze layer is embedded into the filter layer, compounding of the gauze layer and the filter layer is realized, and the quality of the waterproof breathable net membrane is ensured.

The pore size of the (tetra) microporous structure ranges from 0.1 μm to 1.5 μm, is smaller than the diameter of the smallest water droplet (about 20 μm), and is larger than the diameter of a gas molecule or a water molecule. When the waterproof breathable filter layer is used, air or water vapor can pass through the waterproof breathable filter layer, and sundries or water drops can be filtered, so that the waterproof breathable function is achieved, the waterproof breathable filter layer is applied to precision equipment such as a mobile phone, water or sundries can be prevented from contacting internal components of the precision equipment, and normal operation of the internal components of the precision equipment is guaranteed.

Drawings

FIG. 1 is a schematic view of a waterproof breathable web according to one embodiment of the present invention;

FIG. 2 is a scanning electron microscope image of a filter layer according to a first embodiment of the present invention;

FIG. 3 is a schematic view showing the structure of a waterproof breathable web according to a second embodiment of the present invention;

FIG. 4 is an electron microscope scanning image showing a cross section of a water-repellent breathable film according to a second example of the present invention.

In the drawings, the reference numbers:

1. a screen layer; 2. a filter layer; 3. a hot melt adhesive layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, a waterproof breathable net film according to the present invention will be described in detail with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

Example one

Referring to fig. 1, the present application provides a waterproof breathable web, which includes a gauze layer 1 and a filter layer 2, wherein the filter has a microporous structure, and the microporous structure allows gas to pass through but does not allow water droplets to pass through. In the first embodiment, the filter layer 2 is made of EPTFE; the gauze layer 1 is composed of warp yarns and weft yarns which are interwoven with each other, and the material of the gauze layer 1 is PU.

Referring to fig. 1, further, the filter further includes a hot melt adhesive layer 3, the hot melt adhesive layer 3 is located between the gauze layer 1 and the filter layer 2, and the hot melt adhesive layer 3 is melted in a hot melt compounding manner, so that the hot melt adhesive layer 3 is bonded with the gauze layer 1 and the filter layer 2, and the compounding of the gauze layer 1 and the filter layer 2 is realized.

Referring to fig. 1 to 2, in detail, the filter layer 2 is prepared by a biaxial stretching process, the microstructure is a network structure of "microfiber-node", the network structure has a large number of micropores, thereby forming a microporous structure, and the pore size of the microporous structure ranges from 0.1 μm to 1.5 μm, is smaller than the diameter of the smallest water droplet (about 20 μm), and is larger than the diameter of the gas molecule or the water molecule. The use of waterproof ventilative nethike embrane promptly is, and filter layer 2 can supply air or vapor to pass through, and can strain debris or drop of water down to play waterproof ventilative effect, be applied to precision equipment such as cell-phone, can hinder water or debris contact precision equipment's inner assembly, with the inner assembly normal operating of assurance precision equipment.

The working principle of the waterproof breathable net film in the application is as follows: utilize hot melt complex technology, compound filter layer 2 and gauze layer 1 together, utilize filter layer 2 to strain debris or drop of water down to play waterproof ventilative effect, be applied to precision equipment such as cell-phone, can hinder water or debris contact precision equipment's internal component, in order to guarantee precision equipment's internal component normal operating.

Example two:

referring to fig. 3 and 4, the difference between the first embodiment and the second embodiment is that the filter layer 2 and the gauze layer 1 are directly attached to each other, and the waterproof breathable net film is processed by an ultrasonic composite process, so that a part of the material attached to the gauze layer 1 and the filter layer 2 can be forced to permeate into the microporous structure of the filter layer 2 and be embedded into the microporous structure, thereby tightly connecting the gauze layer 1 and the filter layer 2, avoiding the delamination problem of the waterproof breathable net film after the hot-melt composite process, and ensuring the product quality.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A waterproof breathable web, characterized by: the filter layer is embedded into one part of the gauze layer, the filter layer is provided with a microporous structure, and the microporous structure can allow gas to pass through but cannot allow liquid to pass through.

2. The waterproof breathable web of claim 1 wherein: a hot melt adhesive layer is arranged between the gauze layer and the filter layer.

3. The waterproof breathable web of claim 2 wherein: the hot melt adhesive layer is bonded with the filter layer and the gauze layer.

4. The waterproof breathable web of claim 1 wherein: a portion of the layer of mesh penetrates the microporous structure.

5. The waterproof breathable web of claim 1 wherein: the pore size of the microporous structure is smaller than the diameter of water drops and larger than the diameter of gas molecules.

6. The waterproof breathable web of claim 5 wherein: the pore size of the microporous structure ranges from 0.1 μm to 1.5 μm.

7. The waterproof breathable web of claim 1 wherein: the mesh layer includes warp yarns and weft yarns that are interwoven.

8. The waterproof breathable web of claim 1 wherein: the material of the filter layer is EPTFE.

9. The waterproof breathable web of claim 1 wherein: the gauze layer is made of PU.