TWM544414U - Filter - Google Patents

Abstract

A filter comprises a first fiber layer and a second fiber layer which is attached to each other. The first fiber layer is formed with a plurality of first fibers which has first diameter ranging from 5 to 30 [mu]m. The first fiber layer has a first density ranging from 10 to 100 g/m2, a first thickness ranging from 0.1 to 2.0 mm, a first pressure drop ranging from 1.0 to 50 Pa, a first charge level ranging from 25 to 200 [mu]C/m2. The second fiber layer is formed with a plurality of second fibers which has second diameter ranging from 0.1 to 1.0 [mu]m. The second fiber layer has a second density ranging from 5 to 100 g/m2, a second thickness ranging from 0.01 to 0.3 mm, a second pressure drop ranging from 1.0 to 50 Pa, a second charge level ranging from 0 to 25 [mu]C/m2.

Description

Filter material

This creation relates to a filter material, especially a filter material having high filtration efficiency for fluid impurities of different particle sizes.

Regarding the filter medium for filtering fluid impurities, for example, the filter screen in the air cleaner can be roughly classified into charged and uncharged. However, the above two types of filter materials do not filter well for impurities in certain particle size ranges.

Please refer to Figure 3 for the filtration effect of fluid impurities traveling at a speed of 5 cm/s. Among them, the curve L2 represents a conventional filter medium with a charge, and the curve L3 represents a conventional filter material without a charge. In the case of the curve L2, when the impurity particle diameter is about 20 to 30 nanometers (nm), the conventional filter medium having the lowest filtration efficiency is about 0.72, that is, only 72% of the impurities can be captured; In the case of L3, when the impurity particle diameter is about 150 to 200 nanometers (nm), the conventional filter material having no charge has the worst filtration efficiency, and is only about 0.75, that is, only 75% of impurities are trapped.

In addition, please refer to the filtering effect of the fluid impurities traveling at a speed of 25 cm/s (cm/s) as shown in FIG. Among them, the curve L5 represents a conventional filter medium with a charge, and the curve L6 represents a conventional filter material without a charge. In the case of the curve L5, when the impurity particle diameter is about 20 nanometers (nm), the filtration efficiency of the charged conventional filter material is the worst, about 0.48. That is, only 48% of impurities can be captured; in the case of the curve L6, when the impurity particle size is about 100 nanometers (nm), the filter efficiency of the conventional filter material without charge is the worst, about 0.5, that is, only Can capture 50% of impurities.

Accordingly, how to have a "filter material" having high filtration efficiency for fluid impurities of different particle sizes is an urgent problem to be solved by those skilled in the relevant art.

In one embodiment, the present invention provides a filter material comprising: a first fiber layer composed of a plurality of first fibers, the first fiber layer having: a first diameter, which is the diameter of the first fiber, and the first diameter Between 5 and 30 microns; a first density of between 10 and 100 grams per square meter; a first thickness of between 0.1 and 2.0 millimeters; a first pressure loss, Between 1.0 and 50 Pa; a first charge level between 25 and 200 microcoulombs per square meter; and a second fibrous layer consisting of a plurality of second fibers, the second fibrous layer The first fiber layers are attached to each other and have a second diameter which is the diameter of the second fiber, the second diameter is between 0.1 and 1.0 micrometers, and a second density of between 5 and 100 grams per square. Between the meters; a second thickness, between 0.01 and 0.3 mm; a second pressure loss, between 1.0 and 50 Pa; a second charge level, between 0 and 25 Microcoulomb / square meter.

100‧‧‧ filter media

10‧‧‧First fiber layer

11‧‧‧First fiber

20‧‧‧second fiber layer

21‧‧‧second fiber

30‧‧‧Adsorbing materials or catalytic materials

40‧‧‧ third fibrous layer

50‧‧‧non-woven fabric

D1‧‧‧first diameter

D2‧‧‧second diameter

L1~L6‧‧‧ Curve

T1‧‧‧first thickness

T2‧‧‧second thickness

FIG. 1 is a schematic structural view of an embodiment of the present invention.

2 is a schematic enlarged view of a portion A of FIG. 1.

Fig. 3 is a graph showing the impurity filtration efficiency of one of the creation and conventional filter materials.

Fig. 4 is a graph showing another impurity filtration efficiency of the creation and conventional filter materials.

FIG. 5 is a schematic view showing the structure of an adsorbent material or a catalyst material disposed between the first fiber layer and the second fiber layer.

FIG. 6 is a schematic view showing the structure of providing a third fiber layer between the first fiber layer and the second fiber layer.

FIG. 7 is a schematic view showing the structure in which non-woven fabric fibers are provided outside the first fiber layer and the second fiber layer.

Please refer to a filter medium 100 shown in FIG. 1 which includes a first fibrous layer 10 and a second fibrous layer 20 which are uncharged (or naturally charged). The filter medium 100 is used to filter a fluid such as air to capture impurities contained in the fluid. The first fibrous layer 10 and the second fibrous layer 20 may be adhered to each other by a viscous substance, or the first fibrous layer 10 and the second fibrous layer 20 may be attached to each other by other substances or tools, and then The first fibrous layer 10 and the second fibrous layer 20 may be naturally attached without using any foreign matter.

Referring to FIGS. 1 and 2, the first fibrous layer 10 is composed of a plurality of first fibers 11 having a first diameter D1 and a first diameter D1 of between 5 and 30 micrometers (μm). The material of the first fiber 11 is not limited, and may be, for example, a plastic material, including: polyvinyl chloride (PolyVinyl Chloride, PVC), polypropylene (Polypropylene, PP), Polyethylene (PE), Polyethylene terephthalate (PET).

The first fibrous layer 10 has a first density of between 10 and 100 grams per square meter (g/m2); the first fibrous layer 10 has a first thickness T1 of between 0.1 and 2.0 mm. Between (mm); when the fluid passes through the filter medium 100 at a speed of 5 cm/s, the first fibrous layer 10 has a first pressure loss between 1.0 and 50 Pa (Pa); The first fibrous layer 10 has a first charge level of between 25 and 200 microcoulombs per square meter (μC/m2).

Referring to FIGS. 1 and 2, the second fibrous layer 20 is composed of a plurality of second fibers 21 having a second diameter D2 and a second diameter D2 of between 0.1 and 1.0 micrometers (μm). The material of the second fiber 21 is not limited, and may be, for example, a plastic material, including: PolyVinyl Chloride (PVC), Polypropylene (PP), Polyethylene (PE), Polyethylene terephthalate. Ester (PET, Polyethylene Terephthalate).

The second fibrous layer 20 has a second density of between 1.0 and 50 grams per square meter (g/m2); the second fibrous layer 20 has a second thickness T2 of between 0.01 and 0.3 mm. Between (mm); when the fluid passes through the filter medium 100 at a speed of 5 cm/s, the second fibrous layer 20 has a second pressure loss between 1.0 and 50 Pa (Pa); The second fibrous layer 20 has a second charge level between 0 and 25 microcoulombs per square meter (μC/m2).

Referring to FIG. 1 and FIG. 2, the first fiber layer 10 and the second fiber layer 20 have the following relationship: the relationship between the first diameter D1 and the second diameter D2 is: (first diameter D1/second diameter D2)= Between 20 and 300.

The relationship between the first density and the second density is: (first density / second density) = between 1.5 and 10.

The relationship between the first thickness and the second thickness is: (first thickness T1/second thickness T2) = between 5 and 50.

The relationship between the first pressure loss and the second pressure loss is: (second pressure loss / first pressure loss) = between 1 and 10.

Referring to Figure 3, when the fluid passes through the created filter material, the charged conventional filter material, and the uncharged conventional filter material at a rate of 5 cm/s (cm/s), respectively, for the particles in the fluid. The filtration efficiency of impurities with a diameter of 5 to 1000 nanometers (nm) (C/Co, C represents the concentration, Co represents the initial concentration), wherein the curve L1 represents the creation, the curve L2 represents the charged filter, the curve L3 Represents a conventional filter material without charge. In the case of the curve L2, when the impurity particle diameter is about 20 to 30 nanometers (nm), the conventional filter medium having the lowest filtration efficiency is about 0.72, that is, only 72% of the impurities can be captured; For L3, when the impurity particle size is about 150 to 200 nanometers (nm), the filter efficiency of the uncharged conventional filter material is the worst, about 0.75, that is, only 75% of the impurities can be captured; however, The filter material of the present invention, as shown by the curve L1, although the filtration efficiency when the impurity particle diameter is about 40 nm (nm) is slightly decreased, the impurities having a particle diameter of 5 to 1000 nm can be maintained higher than The filtration efficiency of 0.95, which captures more than 95% of the impurities in the fluid, is equivalent to the filtration efficiency of the N95 grade filter.

Please refer to Figure 4, when the fluid passes this at a rate of 25 cm / sec (cm / s) When creating a filter material, a conventional filter material with a charge, and a conventional filter material without charge, the filtration efficiency of the impurity having a particle diameter of 5 to 1000 nm (nm) in the fluid, respectively, wherein the curve L4 represents the creation Curve L5 represents a conventional filter material with a charge, and curve L6 represents a conventional filter material without charge. In the case of the curve L5, when the impurity particle diameter is about 20 nanometers (nm), the filtering efficiency of the charged conventional filter material is the worst, about 0.48, that is, only 48% of the impurities can be captured; as for the curve L6 In other words, when the impurity particle size is about 100 nanometers (nm), the filter efficiency of the uncharged conventional filter material is the worst, about 0.5, that is, only 50% of the impurities can be captured; however, the filter material of the present invention is utilized. As shown by the curve L4, although the filtration efficiency is slightly decreased when the impurity particle diameter is about 50 nm (nm), the filtration efficiency higher than 0.8 can be maintained for the impurity having a particle diameter of 5 to 1000 nm. That is, more than 80% of the impurities in the fluid can be captured.

Referring to FIG. 5, an adsorbent material or a catalyst material 30 may be added between the first fiber layer 10 and the second fiber layer 20 to increase the removal effect on odor or volatile pollutants; For example, activated carbon fibers, activated carbon particles, and zeolites may be used. The catalyst material may be, for example, gold (Au), silver (Ag), or photocatalyst (TiO2).

Referring to FIG. 6 , a third fibrous layer 40 of a mesh, a fiber or a non-woven fabric may be disposed between the first fibrous layer 10 and the second fibrous layer 20 , and the first FIG. 5 is coated, impregnated or adhered. The adsorbent material or catalyst material 30 is attached to the third fiber layer 40, and the third fiber layer 40 is disposed between the first fiber layer 10 and the second fiber layer 20, and the first fiber layer 10 and the first The two fiber layers 20 are combined.

Referring to FIG. 7, a non-woven fabric 50 may be disposed on the outside of the first fibrous layer 10 and the second fibrous layer 20 to protect the filter medium 100 itself.

In summary, the filter material provided by the present invention is attached to one of the charged first fiber layer and the second uncharged (or naturally charged) second fiber layer. The diameter, density, thickness, pressure loss and charge level of the first fiber layer and the second fiber layer have special design values, so that the present invention has high filtration efficiency for fluid impurities of different particle sizes.

However, the specific embodiments described above are only used to illustrate the features and functions of the present invention, and are not intended to limit the scope of implementation of the present invention, without departing from the spirit and technology of the present invention. The equivalent changes and modifications made by the present disclosure are still covered by the scope of the following patent application.

100‧‧‧ filter media

10‧‧‧First fiber layer

20‧‧‧second fiber layer

T1‧‧‧first thickness

T2‧‧‧second thickness

Claims (13)

A filter material for filtering a fluid, the filter material comprising: a first fiber layer, comprising a plurality of first fibers, the first fiber layer having: a first diameter, which is a diameter of the first fiber, the first diameter Between 5 and 30 microns; a first density, between 10 and 100 grams per square meter; a first thickness, between 0.1 and 2.0 mm; a first pressure loss, It is between 1.0 and 50 Pa; a first charge level between 25 and 200 microcoulombs per square meter; and a second fiber layer consisting of a plurality of second fibers, the second fiber The layer and the first fiber layer are attached to each other, and have a second diameter which is a diameter of the second fiber, the second diameter is between 0.1 and 1.0 micrometer; and a second density is between 5 Between 100 g/m2; a second thickness of between 0.01 and 0.3 mm; a second pressure loss of between 1.0 and 50 Pa; a second charge level, Between 0 and 25 microcoulombs per square meter. The filter medium of claim 1, wherein the relationship between the first diameter and the second diameter is: (first diameter / second diameter) = between 20 and 300. The filter medium according to claim 1, wherein the relationship between the first density and the second density is: (first density / second density) = between 1.5 and 10. The filter medium of claim 1, wherein the first thickness and the second The relationship of thickness is: (first thickness / second thickness) = between 5 and 50. The filter medium according to claim 1, wherein the relationship between the first pressure loss and the second pressure loss is: (second pressure loss / first pressure loss) = between 1 and 10. The filter medium of claim 1, wherein the first pressure loss and the second pressure loss mean that the fluid passes through the filter at a speed of 5 cm/sec. The filter material according to claim 1, wherein the first fiber and the second fiber are made of a plastic material, including: PolyVinyl Chloride (PVC), Polypropylene (PP), Polyethylene. (Polyethylene, PE), polyethylene terephthalate (PET, Polyethylene Terephthalate) and other high molecular polymers. The filter medium according to claim 1, wherein an adsorbent material including activated carbon fibers, activated carbon particles, and zeolite is added between the first fiber layer and the second fiber layer. The filter material according to claim 8, wherein the adsorbent material is first coated, impregnated or adhered to a third fibrous layer of a mesh, fiber or non-woven fabric, and the third fibrous layer is further coated or impregnated. And disposed between the first fiber layer and the second fiber layer, and combined with the first fiber layer and the second fiber layer. The filter medium according to claim 1, wherein a catalyst material such as gold (Au), silver (Ag) or photocatalyst (TiO ₂ ) is added between the first fiber layer and the second fiber layer. The filter material according to claim 10, wherein the catalyst material is first coated, impregnated or adhered to a third fibrous layer of a mesh, fiber or non-woven fabric, and the third fibrous layer is further coated or impregnated. And disposed between the first fiber layer and the second fiber layer, and combined with the first fiber layer and the second fiber layer. The filter medium according to claim 1, wherein the first fiber layer and the first The two fiber layers are adhered with a viscous substance. The filter medium according to claim 1, wherein the first fiber layer and the second fiber layer are each provided with a layer of non-woven fibers.