CN206996311U - Porous membrane - Google Patents
Porous membrane Download PDFInfo
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- CN206996311U CN206996311U CN201720624524.7U CN201720624524U CN206996311U CN 206996311 U CN206996311 U CN 206996311U CN 201720624524 U CN201720624524 U CN 201720624524U CN 206996311 U CN206996311 U CN 206996311U
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- porous matrix
- porous
- porous membrane
- matrix
- ultimate strength
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- 239000012528 membrane Substances 0.000 title claims abstract description 76
- 239000011159 matrix material Substances 0.000 claims abstract description 80
- 239000002184 metal Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 18
- 239000010408 film Substances 0.000 description 25
- 230000035699 permeability Effects 0.000 description 10
- 239000002002 slurry Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000009954 braiding Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- -1 wherein Substances 0.000 description 1
Landscapes
- Filtering Materials (AREA)
Abstract
The utility model discloses a kind of porous membrane, film layer including porous matrix and positioned at porous matrix surface, the porous matrix is formed by a diameter of 0.1~0.3mm metal wire knitted, the mesh size of the porous matrix is 180~380 μm, porosity is 25~60%, and ultimate strength is 0.8~2.7KN.Selecting the porous matrix of suitable wall thickness can solve the problems, such as that porous membrane break resistance is poor.Present applicant passes through discovery of largely working, when and using formed by metal wire knitted porous matrix when, the porous matrix with smaller aperture due, larger porosity and higher Resisting fractre intensity is easily obtained, porous membrane is had higher filtering accuracy, less filter pressure and higher mechanical strength concurrently.Empirical tests, when porous matrix is formed by a diameter of 0.1~0.3mm metal wire knitted, mesh size can be obtained as 180~380 μm, porosity is 25~60%, and ultimate strength is 0.8~2.7KN porous matrix, can fully meet requirement.
Description
Technical field
The technical field of the reverse gas cleaning in filtering is the utility model is related to, in particular to porous membrane.
Background technology
Metal dust (i.e. powder) is typically attached on porous matrix again sintered by the porous membrane used in filtering
Manufactured filtering material, the effect one of porous matrix are the carriers as adhesion metal powder, second, improving the power of porous membrane
Learn performance, particularly ultimate strength.For filtering material, the significantly filtering accuracy and filtration pressure of filtering material
Power.And in order to lift the filtering accuracy of porous membrane and reduce filter pressure, generally use mesh is smaller but porosity is larger
Porous matrix.But with having smaller mesh concurrently and the porous membrane of the porous matrix of larger porosity would generally in reverse gas cleaning
The problem of running into fracture or deformation, this becomes the weakness that this kind of filtering material is applied in the special operation condition.Therefore, how to prepare
The problem of going out the porous membrane of high ultimate strength turns into urgent need to resolve.
Utility model content
Main purpose of the present utility model is to provide porous membrane, to solve existing for porous membrane of the prior art
In blowback the problem of easy fracture.
To achieve these goals, there is provided a kind of porous membrane.The porous membrane includes porous matrix and positioned at porous
The film layer of matrix surface, the porous matrix are formed by a diameter of 0.1~0.3mm metal wire knitted, the net of the porous matrix
Hole size is 180~380 μm, and porosity is 25~60%, and ultimate strength is 0.8~2.7KN.
Present applicant have found that for common porous matrix (such as nickel foam, copper mesh, screen cloth), want
Have less aperture and larger porosity concurrently, then need the hole wall in porous matrix between adjacent pores sufficiently thin, this is to lead
Cause porous membrane during reverse gas cleaning easy fracture deform the main reason for.Therefore, the porous matrix of suitable wall thickness is selected i.e.
Can solve the problems, such as the deformation of porous membrane easy fracture.Present applicant is by discovery of largely working, when and using by gold
During the porous matrix that category silk braiding forms, the porous base with smaller aperture due, larger porosity and higher ultimate strength is easily obtained
Body, porous membrane is set to have higher filtering accuracy, less filter pressure and higher mechanical strength concurrently.Empirical tests, when porous
When matrix is formed by a diameter of 0.1~0.3mm metal wire knitted, it is 180~380 μm that can obtain mesh size, porosity
For 25~60%, ultimate strength is 0.8~2.7KN porous matrix, can fully meet requirement.
Further, the aperture of the porous membrane is 5~30 μm, and relative permeability is 300~700m3/m2·
KPah, ultimate strength are 1.2~2.4KN.When using the porous matrix with above-mentioned parameter, by controlling powder in film layer
Granularity and film layer thickness, you can obtain it is above-mentioned with small-bore, high relative permeability and high ultimate strength it is porous thin
Film, thus, the filtering accuracy and filter pressure for solve thing problems, such as porous membrane can not match with ultimate strength.
Further, the thickness of the porous matrix is 0.2~0.6mm, the thickness of the porous membrane for 0.4~
0.8mm.The film layer on porous matrix surface generally by the slurry comprising powder it is coated, it is dry, sintering form, because slurry has
Mobility, therefore, slurry can towards porous matrix inside move, film layer is not only contacted with the outer surface of porous matrix, also with
Pore surface contact inside porous matrix, as thickness >=0.2mm of porous matrix, it is easy to slurry towards in porous matrix
Portion's pore surface motion is to lift the contact area of the pore surface of slurry and porous matrix, so as to lift film layer and porous matrix
Adhesion；As the thickness G T.GT.GT 0.6mm of porous matrix, final porous membrane can be made thicker, cause filter pressure to increase, because
This, the thickness of porous matrix is preferably 0.2~0.6mm.Now, for the ease of the suitable porous matrix of braiding thickness, Ke Yizhi
Connect makes the thickness of porous matrix be twice of wire diameter, is woven two layers in braiding.Similarly, when the thickness of porous membrane
Higher filter pressure is also resulted in when spending ＞ 0.8mm, as the thickness ＜ 0.4mm of porous membrane, strainability is poor, by
This, the thickness of porous membrane is preferably 0.4~0.8mm.Wherein, forming the slurry of film layer mainly includes powder, binding agent and divides
Powder, wherein, powder is forms film layer and film layer is possessed the active material of strainability, such as metal simple-substance powder, alloyed powder.
Further, the porous matrix is formed by a diameter of 0.18~0.25mm metal wire knitted, the porous matrix
Mesh size be 212~270 μm, porosity be 30~45%, ultimate strength is 1.2~2.5KN.Thus, easily filtered
The best porous membrane of the matching degree of precision, filter pressure and ultimate strength.
Further, the aperture of the porous membrane is 15~20 μm, and relative permeability is 400~600m3/m2·
KPah, ultimate strength are 1.6~2.2KN.Thus, of the filtering accuracy of the porous membrane, filter pressure and ultimate strength
It is best with spending.
Further, the thickness of the porous matrix is 0.36~0.5mm, the thickness of the porous membrane for 0.55~
0.7mm.Thus, the performance of gained porous membrane is best.
Further, granularity≤38 μm of the powder of the film layer are formed.The granularity of powder is bigger, easily causes in film layer
More closed pore be present, so as to reduce the gas permeability of porous membrane.Thus it is preferred to make granularity≤38 μm of powder.
Further, the pattern for forming the powder of the film layer is spherical or elliposoidal.Thus, spherical or elliposoidal powder
It is stacked with being lifted the porosity of porous membrane.
Further, the both sides of the porous matrix are equipped with film layer.Thus, the two sides of porous membrane can be realized
Filter, practicality are stronger.
Further, the thickness of the film layer of the both sides is identical with composition.Thus, obtain a kind of more with symmetrical structure
Hole film, make the balancing performance of porous membrane everywhere.
It can be seen that porous membrane of the present utility model use by metal wire knitted form have small-bore, high porosity and
The porous matrix of high ultimate strength so that porous membrane has higher filtering accuracy, less filter pressure and higher disconnected concurrently
Split strength.
The utility model is described further with reference to the accompanying drawings and detailed description.What the utility model added
Aspect and advantage will be set forth in part in the description, and partly will become apparent from the description below, or pass through this practicality
New practice is recognized.
Brief description of the drawings
Form a part of accompanying drawing of the present utility model to be used for aiding in understanding of the present utility model, provided in accompanying drawing
Content and its relevant explanation in the utility model can be used for explaining the utility model, but do not form to it is of the present utility model not
Work as restriction.In the accompanying drawings：
Fig. 1 is a kind of structural representation of the utility model porous membrane.
Fig. 2 is another structural representation of the utility model porous membrane.
Embodiment
Clear, complete explanation is carried out to the utility model below in conjunction with the accompanying drawings.Those of ordinary skill in the art based on
The utility model can be realized in the case of these explanations.It is before being illustrated with reference to accompanying drawing to the utility model, it is necessary to special
It is not pointed out that：
(1) technical scheme in the utility model provided in each several part including the description below and technology are special
Sign, in the case where not conflicting, these technical schemes and technical characteristic can be mutually combined.
(2) embodiment of the present utility model being related in the description below is generally only the implementation of the utility model part
Example, rather than whole embodiments.Therefore, do not had based on the embodiment in the utility model, those of ordinary skill in the art
The every other embodiment obtained on the premise of making creative work, it should all belong to the scope of the utility model protection.
(3) on the explanation to term in the utility model.Specification and claims of the present utility model and relevant
Part in term " first ", " second " etc. be easily to cause the object confused for distinguishing, without specific for describing
Order or precedence.In addition, term " comprising " and " having " and their any deformation, it is intended that covering is non-exclusive
Include.Term " filtering accuracy " refers to that porous membrane allows the size of the largest particles passed through.Term " air transmission coefficient " refers to gas
The complexity that body flows in porous membrane.Term " ultimate strength " refers to during the tension test carried out under prescribed conditions
Required maximum, force when sample is pulled off.Term " porosity " refers to the ratio shared by unit volume porous membrane void volume.
Term " relative permeability " refers under every kPa of filter pressure the infiltration capacity of air under every square metre of filter area per hour.
Porous membrane of the present utility model, including porous matrix 1 and the film layer 2 positioned at the one or both sides of porous matrix 1, institute
Porous matrix 1 to be stated to be formed by a diameter of 0.1~0.3mm metal wire knitted, the thickness of the porous matrix 1 is 0.2~0.6mm,
Mesh size is 180~380 μm, and porosity is 25~60%, and ultimate strength is 0.8~2.7KN.The thickness of the porous membrane
For 0.4~0.8mm, aperture is 5~30 μm, and relative permeability is 300~700m3/m2KPah, ultimate strength be 1.2~
2.4KN。
The pattern for forming the powder of the film layer 2 is spherical or elliposoidal, granularity≤38 μm of powder.
Illustrate the beneficial effects of the utility model by the following examples.
It is the selection of porous matrix 1 first, 1~10 illustrates by the following examples.
The something in common of the porous matrix 1 of embodiment 1~5 is that mesh size is 250 μm, and thickness is corresponding metal
Twice of silk diameter, difference are that the diameter of wire is different with porosity, the ultimate strength of corresponding porous matrix 1
Difference, specific numerical value are shown in Table 1.
The performance parameter of the porous matrix 1 of the embodiment 1~5 of table 1..
As it can be seen from table 1 for the porous matrix 1 of certain mesh size, the increase of wire diameter can cause hole
Rate reduces, and the porous matrix 1 of above-described embodiment 1~5 is respectively provided with higher ultimate strength, a diameter of especially when wire
When 0.18~0.25, corresponding porous matrix 1 has higher porosity and higher ultimate strength concurrently, now, is easy to make correspondingly
Porous membrane obtain higher relative permeability and ultimate strength.
The something in common of the porous matrix 1 of embodiment 6~9 is 0.23mm for the diameter of wire, and thickness is
0.46mm, difference are that mesh size is different with porosity, and the ultimate strength of corresponding porous matrix 1 is also different, specifically
Numerical value be shown in Table 2.
The performance parameter of the porous matrix 1 of the embodiment 6~9 of table 2..
Mesh is bigger, and filtering accuracy is lower, and porosity is higher, and gas permeability is better, and filter pressure is lower.Can be with from table 2
Find out, for the certain porous matrix 1 of wire diameter, the increase of mesh size can cause porosity to increase, illustrate small-bore
It is difficult to take into account with high porosity.The porous matrix 1 of above-described embodiment 6~9 is respectively provided with higher ultimate strength, higher hole
Gap rate and less mesh, especially when a diameter of the 212~270 of wire, porous matrix 1 have concurrently higher porosity and
Higher ultimate strength, now, it is easy to make corresponding porous membrane obtain higher ultimate strength and less filter pressure.
To sum up, when the wire diameter of porous matrix 1 is 0.1~0.3mm, thickness is 0.2~0.6mm, mesh size is
180~380 μm, porosity be 25~60%, porous matrix 1 is respectively provided with higher ultimate strength, higher porosity and smaller
Mesh, be easy to make corresponding to porous membrane obtain high ultimate strength, small filter pressure and high filtering accuracy.It is preferred that
Ground, the wire diameter of porous matrix 1 is 0.18~0.25mm, thickness is 0.36~0.5mm, and mesh size is 212~270 μ
M, porosity is 30~45%.
Next to that the determination of film layer 2, understands by checking, when using same powder, pass through the screen cloth of different meshes
To screen powder, and if only if using the smaller powder of the diameter of the particle of the screen cloth than that can pass through 400 mesh, could obtain anti-disconnected
The preferable porous membrane of fragility energy, illustrates that the maximum particle size of particle in the powder should also be as≤38 μm.Meanwhile when using spherical
During powder, the porosity highest of porous membrane.
10~14 illustrate the determination of porous membrane thickness and aperture by the following examples, wherein, embodiment 10~14
Porous matrix 1 use embodiment 3 porous matrix 1, the composition of the film layer 2 of porous membrane is identical, form film layer 2 powder
Expect that for stainless steel alloy powder, the alloyed powder screen cloth of 400 mesh can be completely extended across, the pattern of powder is spherical.
The performance parameter of the porous membrane of the embodiment 10~14 of table 3..
In general, when the timing of thickness one using identical porous matrix 1 and gained porous membrane, the hole of porous membrane
Footpath is bigger, then relative permeability is higher, and required filter pressure is smaller, but ultimate strength and filtering accuracy are relatively low；When using phase
The timing of aperture one of same porous matrix 1 and gained porous membrane, the thickness of porous membrane is bigger, then the thickness of film layer 2 is thicker,
The ultimate strength and relative permeability of porous membrane are lower；Therefore, the thickness of porous membrane and aperture need to be mutually matched.From
The porous membrane that table 3 can be seen that embodiment 10~14 is respectively provided with the thickness to match and aperture, is breathed freely relatively with higher
Coefficient and ultimate strength.
In the above embodiments, film layer 2 is respectively positioned on the side of porous matrix 1, as shown in Figure 1.
Embodiment 15 is the reference examples of embodiment 12, and the difference of embodiment 15 and embodiment 12 is：It is as shown in Fig. 2 more
The both sides of hole matrix 1 are respectively provided with film layer 2, and the thickness and group of the thickness of both sides film layer 2 and composition with film layer 2 in embodiment 12
Into identical, empirical tests, the porous membrane of the porous membrane of embodiment 15 has higher ultimate strength.
Embodiment 16 is another reference examples of embodiment 12, and the difference of embodiment 16 and embodiment 12 is porous matrix
1 is different：Embodiment 16 using the thickness of the porous matrix 1 with embodiment 12, aperture, porosity all same copper mesh.Through
Checking, the ultimate strength for the porous membrane being made up of the porous matrix 1 of embodiment 16 is only 1.2~1.3KN, much smaller than embodiment
The ultimate strength of 12 porous membrane.
Claims (10)
1. porous membrane, including porous matrix (1) and the film layer (2) positioned at porous matrix (1) surface, it is characterised in that：It is described
Porous matrix (1) is formed by a diameter of 0.1~0.3mm metal wire knitted, the mesh size of the porous matrix (1) for 180~
380 μm, porosity is 25~60%, and ultimate strength is 0.8~2.7KN.
2. porous membrane as claimed in claim 1, it is characterised in that：The aperture of the porous membrane is 5~30 μm, relatively thoroughly
Gas coefficient is 300~700m3/m2KPah, ultimate strength are 1.2~2.4KN.
3. porous membrane as claimed in claim 1, it is characterised in that：The thickness of the porous matrix (1) is 0.2~0.6mm,
The thickness of the porous membrane is 0.4~0.8mm.
4. porous membrane as claimed in claim 1, it is characterised in that：The porous matrix (1) by a diameter of 0.18~
0.25mm metal wire knitted forms, and the mesh size of the porous matrix (1) is 212~270 μm, and porosity is 30~45%,
Ultimate strength is 1.2~2.5KN.
5. porous membrane as claimed in claim 4, it is characterised in that：The aperture of the porous membrane is 15~20 μm, relatively
Air transmission coefficient is 400~600m3/m2KPah, ultimate strength are 1.6~2.2KN.
6. porous membrane as claimed in claim 4, it is characterised in that：The thickness of the porous matrix (1) be 0.36~
0.5mm, the thickness of the porous membrane is 0.55~0.7mm.
7. the porous membrane as described in one of claim 1-6, it is characterised in that：Form the pattern of the powder of the film layer (2)
For spherical or elliposoidal.
8. the porous membrane as described in one of claim 1-6, it is characterised in that：Form the granularity of the powder of the film layer (2)
≤38μm。
9. the porous membrane as described in one of claim 1-6, it is characterised in that：The both sides of the porous matrix (1) are equipped with
The film layer (2).
10. porous membrane as claimed in claim 9, it is characterised in that：The thickness and composition phase of the film layer (2) of the both sides
Together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720624524.7U CN206996311U (en) | 2017-06-01 | 2017-06-01 | Porous membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720624524.7U CN206996311U (en) | 2017-06-01 | 2017-06-01 | Porous membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206996311U true CN206996311U (en) | 2018-02-13 |
Family
ID=61443734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720624524.7U Active CN206996311U (en) | 2017-06-01 | 2017-06-01 | Porous membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206996311U (en) |
-
2017
- 2017-06-01 CN CN201720624524.7U patent/CN206996311U/en active Active
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