CN1166432C - Method for mfg. high air permeability filter material and product thereby - Google Patents
Method for mfg. high air permeability filter material and product thereby Download PDFInfo
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- CN1166432C CN1166432C CNB011339721A CN01133972A CN1166432C CN 1166432 C CN1166432 C CN 1166432C CN B011339721 A CNB011339721 A CN B011339721A CN 01133972 A CN01133972 A CN 01133972A CN 1166432 C CN1166432 C CN 1166432C
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Abstract
The present invention relates to a making method of a high air permeability filter material and a product thereof. The making method is characterized in that the making method comprises the following steps: a central layer for spacing and sticking is provided, and the central layer has a corresponding first surface and a second surface; filter materials are respectively attached to the first surface and the second surface of the central layer. Since the filter materials are attached to two surfaces of the central layer for spacing and sticking, an effect with high filtration efficiency and low pressure difference is obtained.
Description
[technical field]
The present invention relates to a kind of method for making and goods thereof of highly-breathable filter material, particularly relate to a kind of respectively in order at interval and two surfaces up and down in the intermediate layer of adhesion fit filter materials (filtration media) to reach method for making and the goods thereof that reduce pressure reduction and have the highly-breathable filter material of filtration efficiency.
[background technology]
Fig. 1 is high in the past filterability filter material, and it is that the surface that is used in adhesive-bonded fabric 11 is gone up with the sticker high efficiency filter material of fitting and formed.Generally speaking, requirement condition to high filterability filter material comprises filtration efficiency and low pressure reduction, its filter efficiency is meant that through behind the filter material, the particle number of removing is with respect to the ratio of the particle number before filtering, and pressure reduction is meant that the force value behind the air communication filter material deducts by the force value before the filter material.Though the filter efficiency of high in the past filterability filter material can reach rough height, yet its pressure reduction is also high.The problem that air mass flow behind the impurity screening reduces for instance, when high filterability material in the past is applied to filtered air, may take place in the problem that the too high high filterability material of pressure reduction may cause gas flow to reduce.Because the PTFE filter material is along with filter effect (as 99.99%) is higher, pressure reduction higher (as 151.4 millimeters of water) then, so, if can utilize the filter material (as 99.895%) of low filter effect, then effectively reduce High Pressure Difference (as reducing by 18.5 millimeters of water) in the past, so can utilize the filter material of the low filter effect of overlapping multilayer, then can reach high filter effect approximately in the past, but can significantly reduce pressure reduction.
[summary of the invention]
The object of the present invention is to provide a kind of method for making and goods thereof that filtration efficiency reaches the highly-breathable filter material of the effect of hanging down pressure reduction that reach.
So the method for making of highly-breathable filter material of the present invention comprises following steps:
Step 1: provide one in order to the intermediate layer of interval, and described intermediate layer has a relative first surface and a second surface with adhesion; And
Step 2: go up the filter efficiency of fitting respectively at first and second surface in described intermediate layer and be lower than 99.97% filter material.
Moreover, highly-breathable filter material of the present invention, be comprise at least one have a relative first surface and a second surface and have at interval go up filter efficiency with the intermediate layer of adhesion usefulness and a plurality of corresponding surface that fits in described intermediate layer respectively and be lower than 99.97% filter material, so as to the effect that reaches filtration efficiency and hang down pressure reduction.
[description of drawings]
The present invention is described in detail below in conjunction with drawings and Examples:
Fig. 1 is the structural representation of high in the past filterability filter material.
Fig. 2 is the structural representation of preferred embodiment of the present invention.
Fig. 3 is this preferred embodiment and high filterability filter material result's of test under the same terms overview in the past.
Fig. 4 is the structural representation of another preferred embodiment of the present invention.
Fig. 5 is the structural representation of another preferred embodiment of the present invention.
[specific embodiment]
Fig. 2 shows a preferred embodiment of the present invention, and it comprises an intermediate layer 2 and two filter materials 3.Intermediate layer 2 has opposite first 21 and second surface 22.The intermediate layer 2 of present embodiment is in order to keep the clearance space between two filter materials 3, the intermediate layer 2 of present embodiment is to be the composite fibre layer that fiber constituted of different melting points by two kinds in addition, and this composite fibre layer 2 can be the made cloth or the adhesive-bonded fabric of fiber of two kinds of different melting points thus, for example described intermediate layer 2 can be made by dacron fibre (PET) and upgrading dacron fibre (CoPET), perhaps by heart sheath type (sheat core type) composite fibre and each half mould (side by side type) composite fibre.Two filter materials 3 are to cover the first surface 21 and second surface 22 that fits in intermediate layer 2 respectively.The General Definition filter effect is then to be filtration efficiency more than 99.97%, in the present embodiment, two filter materials 3 are first surfaces 21 of being lower than filtration efficiency and being positioned over intermediate layer 2 respectively with second surface 22 on after, utilize heating and pressing mode, reach the effect in applying intermediate layer 2.And when adding hot pressing two filter materials 3, can make the wherein more low-melting a kind of fiber in intermediate layer 2 arrive fusing point and be the melting state, to come bonding two filter materials 3 as sticker.So intermediate layer 2 has the function that keeps the interval between two filter materials 3, and the function of bonding two filter materials 3.In addition, in the present embodiment, the material of filter material 3 is to can be polytetrafluoroethylene (PTFE), the all-glass paper (glass fiber paper) that is lower than filtration efficiency or melt and spray adhesive-bonded fabric or the like and so on.
According to preceding described structure, the manufacture method of present embodiment, comprise two steps substantially: step 1-intermediate layer 2 is provided, and step 2-respectively at utilizing heating and pressurization to make the fiber that fusing point is lower in the intermediate layer 2 molten on two surfaces 21,22 in intermediate layer 2 with applying filter material 3.Be provided with whereby, can reach filter efficiency greater than 99.995% and pressure reduction less than 37.1 millimeters of water (very less than in the past pressure reduction).
In order to prove that the present invention can solve the shortcoming of High Pressure Difference in the past really and reach high filter effect, please in the lump with reference to Fig. 3, be under 32 liters/second of flows (be called for short LPM) at 0.26 micron particulate respectively to high filterability (referring to 99.99%) filter material and highly-breathable filter material of the present invention were tested in the past, the intermediate layer 2 of the highly-breathable filter material of present embodiment is to use by PET (PET) and the made adhesive-bonded fabric of upgrading PET (CoPET) in this test, and the material of filter material 3 is 99.895% PTFE film:
1. pressure reduction:
High filterability (99.99%) filter material in the past, its pressure reduction is up to 151.4 millimeters of water, and the pressure reduction of the individual layer filter material 3 in the present embodiment is 18.5 millimeters of water, and calculate at the pressure reduction after two-layer filter material 3 overlapping pressings according to theory is 37 millimeters of water (the 18.5+18.5=37 millimeters of water), and pressure reduction only is 36.1 millimeters of water after tested, so the present invention is with respect to the advantage that can reach low pressure reduction really in the past.
2. filter efficiency
The film adhered adhesive-bonded fabric of PTFE in the past, its filter efficiency is 99.99%, the filter efficiency of the PTFE film that present embodiment adopted is 99.895%, so when through the PTFE filter material 3 of the top that being positioned at intermediate layer 2, its filter efficiency can reach 99.895%, promptly by only remaining 0.105% particulate behind the filter material 3, and after passing through the filter material 3 of the below that is positioned at intermediate layer 2 again, the filter effect of this filter material 3 also is 99.895%, so only remaining 0.000961% particulate (0.00105* (1-0.99895)=0.0000011025), so filter efficiency can reach 99.999% (1-0.0000011025=0.99999889), through the actual verification result is 99.995% filter efficiency near these data, so meet the definition of high efficiency filter material, thereby the present invention do not solve the problem of High Pressure Difference in the past only, with respect to the advantage that more can improve filter efficiency in the past.
In sum, in the present invention, two surfaces 21,22 that are used in intermediate layer 2 filter material 3 of fitting respectively can reach the advantage of low pressure reduction and filtration efficiency really.
Moreover, as Fig. 4, be another embodiment of the present invention, these embodiment three metafiltration materials 3 and two intermediate layers 2 that are arranged at intervals at wherein, because the structure of the multilayer of this embodiment stack, so also have the low pressure reduction of previous embodiment and the advantage of filtration efficiency.
Secondly, as Fig. 5, be another embodiment of the present invention, three layers of intermediate layer 2 of this embodiment and two filter materials 3 that are arranged at intervals at wherein, because the structure that this embodiment also superposes for multilayer, so the low pressure reduction of previous embodiment and the advantage of filtration efficiency are also arranged.
Though it should be noted that all define previous embodiment to the number of intermediate layer and filter material, yet be familiar with this operator when knowing, in fact can increase the number of plies of intermediate layer and filter material according to need, should not be subject in this specification cited.
Claims (13)
1. the method for making of a highly-breathable filter material is characterized in that comprising following steps:
Step 1) provides an intermediate layer in order to interval and adhesion, and described intermediate layer has one first and one relative second surface; And
Step 2) goes up the filter efficiency of fitting respectively at first and second surface in described intermediate layer and be lower than 99.97% filter material layer.
2. the method for making of highly-breathable filter material according to claim 1 is characterized in that:
Step 2) filter efficiency described in is lower than 99.97% filter material layer to be by polytetrafluoroethylene film, all-glass paper and to melt and spray adhesive-bonded fabric and constituted and select one in the group and constitute.
3. the method for making of highly-breathable filter material as claimed in claim 1 is characterized in that:
Described method for making comprises that also step 3) is respectively at step 2) the intermediate layer of fitting, the filter efficiency surface that is lower than 99.97% two filter material layers.
4. the method for making of highly-breathable filter material as claimed in claim 1 is characterized in that:
Described method for making also comprises step 4), in step 2) filter efficiency be lower than fit at least one surface of 99.97% filter material layer an intermediate layer and the filter efficiency of on the surface in described intermediate layer, fitting and be lower than 99.97% filter material layer.
5. as the method for making of claim 1 or 4 or 5 described highly-breathable filter materials, it is characterized in that:
It is to fit on the corresponding surface in described intermediate layer with pressing mode with heating that described filter efficiency is lower than 99.97% filter material layer.
6. as the method for making of claim 1 or 3 or 4 described highly-breathable filter materials, it is characterized in that:
Described intermediate layer is the composite fibre layer that fiber constituted by two kinds of different melting points, makes with heating and pressurization the time, and the fiber that fusing point is lower in the described composite fibre layer can melting be lower than 99.97% filter material layer with bonding described filter efficiency.
7. the method for making of highly-breathable filter material as claimed in claim 1 is characterized in that:
Described intermediate layer is the made adhesive-bonded fabric of a kind of composite fibre.
8. the method for making of highly-breathable filter material as claimed in claim 1 is characterized in that:
Described intermediate layer is weaving cotton cloth of being made into of a kind of composite fibre.
9. as the method for making of claim 7 or 8 described highly-breathable filter materials, it is characterized in that:
The composite fibre in described intermediate layer is made of heart sheath type composite fibre and half and half fiber type.
10. highly-breathable filter material is characterized in that comprising:
The intermediate layer and the plural filter efficiency of at least one interval and adhesion usefulness are lower than 99.97% filter material layer; And
Each described intermediate layer has a relative first surface and a second surface, and it is to fit in respectively on the corresponding surface in described intermediate layer that each described filter efficiency is lower than 99.97% filter material layer.
11. highly-breathable filter material as claimed in claim 10 is characterized in that:
Described intermediate layer is weaving cotton cloth of being made into of a kind of composite fibre.
12. highly-breathable filter material as claimed in claim 10 is characterized in that:
Described intermediate layer is the made adhesive-bonded fabric of a kind of composite fibre.
13. highly-breathable filter material as claimed in claim 10 is characterized in that:
The material that described filter efficiency is lower than 99.97% filter material layer is by polytetrafluoroethylene (PTFE), all-glass paper and melts and sprays and select one in the group that adhesive-bonded fabric constitutes and constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011339721A CN1166432C (en) | 2001-08-17 | 2001-08-17 | Method for mfg. high air permeability filter material and product thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011339721A CN1166432C (en) | 2001-08-17 | 2001-08-17 | Method for mfg. high air permeability filter material and product thereby |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1401407A CN1401407A (en) | 2003-03-12 |
| CN1166432C true CN1166432C (en) | 2004-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011339721A Expired - Lifetime CN1166432C (en) | 2001-08-17 | 2001-08-17 | Method for mfg. high air permeability filter material and product thereby |
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| Country | Link |
|---|---|
| CN (1) | CN1166432C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8083828B2 (en) * | 2009-06-19 | 2011-12-27 | Hollingsworth & Vose Company | Fiber web having a high stiffness |
| US11014030B2 (en) | 2016-02-17 | 2021-05-25 | Hollingsworth & Vose Company | Filter media including flame retardant fibers |
| US10252200B2 (en) | 2016-02-17 | 2019-04-09 | Hollingsworth & Vose Company | Filter media including a filtration layer comprising synthetic fibers |
| CN111974090B (en) * | 2020-08-19 | 2022-06-28 | 厦门市纳丝达无纺布有限公司 | Preparation method of static-free high-efficiency filtering fiber material |
-
2001
- 2001-08-17 CN CNB011339721A patent/CN1166432C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1401407A (en) | 2003-03-12 |
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Granted publication date: 20040915 |