CN100421766C - Improved resin impregnated filter media - Google Patents
Improved resin impregnated filter media Download PDFInfo
- Publication number
- CN100421766C CN100421766C CNB028089650A CN02808965A CN100421766C CN 100421766 C CN100421766 C CN 100421766C CN B028089650 A CNB028089650 A CN B028089650A CN 02808965 A CN02808965 A CN 02808965A CN 100421766 C CN100421766 C CN 100421766C
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- China
- Prior art keywords
- resin
- filter medium
- fiber
- base material
- rheology modifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
- B01D39/163—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin sintered or bonded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
- Y10T442/102—Woven scrim
- Y10T442/109—Metal or metal-coated fiber-containing scrim
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Filtering Materials (AREA)
Abstract
A filter medium is made by coating and impregnating a woven or non-woven substrate with a thermosetting resin so that the yarns or fibres of the substrate are encapsulated and bonded at their points of contact. The resin is diluted to below 15 % e.g. 10 % solids and a rheology modifier such as hydroxy-ethyl cellulose is added before application. The resin is cured by heating to above its curing temperature. The resin may be pre-heated to drive of solvent after application but before curing.
Description
Invention field
The present invention relates to weave or the filter medium of nonwoven substrates improved comprising.
Background of invention
EP-A-0,741,815 disclose the manufacture method that is suitable for as the fabric of filter medium, and it comprises the network polymers film is coated on the suitable base material from releasing sheet.The filter medium that obtains provides micro porous filter, and it has good wearability and film durability.Yet when film was denuded, base material was easy to wearing and tearing and filter medium loses its microfiltration ability.
Useful life for the improved filter medium, wish to improve the wearability of filter cloth, belt lining etc., and, as possible, wish to reduce the speed that filter capacity worsens, when more coarse base material being carried out surface treatment or, being easy to take place the deterioration of filter capacity from one side or another side when carrying out the part dipping.Yet,, generally tend to be applied on the base material as discrete layer for the coating that applies, perhaps in base material, only infiltrate short distance, therefore when the base material that applies stands to rub, in case coating is worn, even only worn and torn partly, filter medium also can damage rapidly.
Japanese patent application No. 06301439, publication number 08131735 discloses the filter medium of the blend that comprises two types of fibers, but described two types of fibers are fibers of filter fiber and hot melt.When filter medium is heated with moulding, but described fiber connects together by means of the partial melting of described meldable fibre.Reinforcing material is connected to the crosspoint of described two types of fibers, and described reinforcing material can be for example water miscible phenolic aldehyde, epoxy resin, unsaturated polyester (UP) or polyamide.This class filter medium is intended for for example cylindric cartridge filter etc.But how unclear described reinforcing material is introduced, and does not also know how to make it be adhered to the crosspoint of described two types of fibers.The nonwoven substrates that use comprises the blend of two kinds of different fiber types has improved production cost, because described fiber must be at first by blend.Simultaneously, in described fibre blend, exist fusible component that the practicality of described filter medium is limited to the purposes of lower temperature,, cause filtering the fibrous material that hole is melted and cover because high temperature can cause the further fusion of fusible fibers.
Summary of the invention
The method that the purpose of this invention is to provide pliable and tough filter media material and manufacturing filter media material, described filter media material has improved wearability and higher dimensional stability, and it does not have above-mentioned shortcoming basically, has kept the compliance of the medium of producing simultaneously.
First aspect, the invention provides the method for making pliable and tough filter medium, it comprises with the thermosetting resin dipping weaves or nonwoven substrates, be heated to the solidification temperature that is suitable for employed resin by base material subsequently and make described resin solidification described dipping, the yarn of described base material or fiber are by described resin encapsulate whereby, make described yarn or fiber bonded to each other at their places intersected with each other, the compliance that has kept the medium of producing simultaneously, it is characterized in that, described resin is mixing with rheology modifier coated with preceding, with viscosity and the flow behavior of controlling described resin.
Rheology modifier can be added in the resin system, wherein said resin system is diluted to and is lower than 15% solids content, 10% solids content for example, and the addition of rheology modifier is for being lower than 5% weight, 3% weight for example.The example of operable rheology modifier is a hydroxyethylcellulose.
Second aspect, the invention provides filter medium, it comprises weaving or the base material of supatex fabric with thermosetting resin dipping, described thermosetting resin is cured by subsequently the base material of described dipping being heated to the solidification temperature that is suitable for used resin, the yarn of described base material or fiber are by described resin encapsulate, make described yarn or fiber bonded to each other at their places intersected with each other, the compliance that has kept the medium of producing simultaneously, it is characterized in that, described resin is mixing with rheology modifier coated with preceding, with viscosity and the flow behavior of controlling described resin.
Detailed Description Of The Invention
Described thermosetting resin can be anyly to be selected from following resin or any two or more are selected from the mixture of following resin: phenolic aldehyde, epoxy, formaldehyde, amino furans, melamine, polysiloxanes, unsaturated polyester (UP), polyurethane, polyamide, fluorocarbons or based on the thermosetting resin of crosslinked thermoplastic.
In addition, other known additives can be added described resin to improve other performance.Example can comprise: carbon (giving conduction or antistatic property), the grafting binding agent, it is connected to PTFE (improving filter cake discharges) on the chain terminating agent of phenol end group, perhaps for example 3-trimethoxysilyl, poly dimethyl octadecyl ammonium chloride and silane quaternary salt (to minimize the increase of crystallization or mushroom) of antiseptic.
Described thermosetting resin preferably is penetrated into the degree of depth that reaches certain in the base material, can obtain the dimensional stability of needs and the balance of compliance like this, and effectively with fiber or yarn encapsulate or coating in the dipping of the fabric part, and do not block weave or felting yarn or fiber between hole.If desired, described hole can be used to keep poromerics, for example flocculation, cohesion, foaming or other micro porous materials.
Described base material can be woven or non-woven felt, spunbond, heat bonding or melt and spray, comprise polymer yarns or fiber, and these can be any of polyester (for example PET) or polypropylene or other materials, for example polyamide (nylon) or polyethylene or polyurethane or two or more blend.Described base material also can comprise the mesh screen or the filter screen of metal or pottery.
Described resin can be used as liquid and applies, and by means of means known, for example cutter is coated with, spraying or lick apply, perhaps by means of described base fabrics is flooded in coating material.Fabric preferably continues time enough to the exposure of resin liquid, reaches the degree of depth that needs in the base fabrics to guarantee that liquid is penetrated into.The liquid of loaded resin can be moisture or nonaqueous dispersion or the emulsion etc. of described resin in liquid phase.Before solidifying, the fabric that applies is randomly through middle heating, its heating-up temperature is lower than solidification temperature, to remove moisture or other solvents and fiber sealed, this will guarantee described resin-bonding on described fiber or yarn and with its " wetting ", and the space of not blocking described fabric construction basically.Carry out the curing of resin then, be that 5 minutes to one hour or longer and typical solidification temperature are 100 ℃ to 200 ℃ typical hardening time.Middle heating and curing can be carried out in one way; Perhaps described step can be carried out respectively, and not necessarily closely be connected.
Method of the present invention is described now by way of example in more detail and by the embodiment of the filter medium of its production.
Embodiment
Example I
Apply the base fabrics of the needling non-woven felt that comprises PET (PETG) fiber with moisture thermosetting phenolic resin lick.
Then, in the temperature that approaches 100 ℃, with described felt heating 10 to 20 minutes, with by the evaporation water with the felt drying, and make resin softening, make its wetting effectively fiber, whereby with the fiber encapsulate in resin.
After drying steps is finished, the felt that applies is heated to 160 ℃, and under this temperature, kept 10 minutes, carry out the curing of thermosetting resin whereby.
Test specification is compared with untreated felt, and the filter medium that obtains only has the compliance and the air penetrability of infringement slightly, and dimensional stability and wearability are significantly improved in addition.
Example II
Comprise the base fabrics of weaving polypropylene cloth with moisture thermosetting phenolic resin coating.Described resin uses the scraper coating process to apply.
Then, the cloth that applies is heated to about 130 ℃ and this temperature maintenance 1 hour, guarantees the wetting effectively described fiber of described resin whereby, make described fiber, carry out resin solidification subsequently by described resin-encapsulate.
Equally, compare with untreated fabric, the filter medium that obtains has the dimensional stability and the wearability of raising, has only damaged compliance and air penetrability slightly.
This method is equally applicable to Woven fabric, is applicable to apply yarn or the fiber that constitutes this fabric.
Fig. 1 with the view specification of remarkable amplification the structural change of impregnation zone of the filter medium produced by non-woven felt in the example I of inferring.
Fig. 2 is the scanning electron micrograph of polyester Nomex of the coating of the foregoing description I preparation;
Fig. 3 is the scanning electron micrograph of polypropylene cloth uncoated before the processing of carrying out the foregoing description II;
Fig. 4 be the foregoing description II coating weave the polyacrylic scanning electron micrograph of multifilament;
Fig. 5 is the zoomed-in view of the meniscus of the coated fiber of two vicinities in multifilament yarn and binding resin;
Fig. 6 is the microphoto of weaving the multifilament yarn cross section that applies in the polypropylene cloth that is applying;
Fig. 7 shows the figure of coating processing of the present invention to the influence of permeability and filter throughput;
Fig. 8 is the improved figure that shows by the polypropylene ribbon dimensional stability of coating processing of the present invention; With
Fig. 9 shows the figure of weaving polyacrylic wearability of comparing the phenolic resins processing with untreated base material.
As shown in Figure 1, the impregnate fabric that is obtained by embodiment 1 comprises the fiber 20 of a series of random orientations, and some of them show with cutaway view. The fiber of every coating comprises the core 20 that is comprised of fiber itself and coating or the skin 22 of thermosetting resin, and its drying stage by the method that the resin wetted fiber is described at embodiment produces. When fiber 20 intersected and contacts with each other, resin formed bridge or converges body 24, and it firmly connects fiber each other. In case resin is cured, this bonding will forever maintenance.
The scanning electron micrograph of Fig. 2 has shown the part of the polyester needle punched blanket of the coating that said method 1 is produced. As shown, coating 22 is tended to converging gathering in the body 24 in the zone that intermeshes of fiber 20, and the skin portion that wherein thickens extends along fiber.
Fig. 3 shows yarn uncoated in the polypropylene cloth, and it does not have medium basically between yarn, therefore can not provide dimensional stability and wear prevention, is proven by there being fibrillation 25 on the yarn surface.
Fig. 4 has shown the situation after this yarn applies, and can notice that fibrillation is less obvious, and the bridge of resin for example 26 connects and suppressed their relative motion with yarn, thereby has improved stability and reduced wearing and tearing. Shown the resin meniscus between the yarn that amplifies among Fig. 5.
Fig. 6 has shown the infiltration of resin between the fiber of multifilament yarn, and this infiltration has reduced the inter deterioration in the yarn.
Fig. 7 has contrasted the filtration throughput (tolerance of permeability) of filter cloth, and described filter cloth is untreated or by the inventive method resin impregnating. Can notice that the reduction of permeability is less.
Fig. 8 has contrasted that process and dimensional stability untreated polypropylene ribbon similarly, and it is measured by stretching at weft direction.
The band (solid line) of processing shows larger dimensional stability than untreated band, shows and need to larger power produce identical " stretching ". For example, when applied stress was 20kgf/2.5cm, the band of processing showed about 7% strain (perhaps percentage elongation), and the demonstration of untreated band is higher than 12% strain.
At last, Fig. 9 has shown that process and untreated comparative test result of weaving polypropylene base. Untreated material shows the permeability that obviously improves behind 2000 abrasion cycles, the loss of expression microfiltration, but the material of processing does not manifest obvious deterioration.
The bonding dimensional stability that improved of producing like this, so yarn moves and the tendency of each other friction is reduced, and has reduced the fabric wearing and tearing and has finally reduced yarn breakage. Have similarly effect in weaving base fabrics, wherein yarn is coated and formed at weavy grain hinge place and to converge the body bridge, and perhaps in multifilament yarn or staple yarn situation, parallel fiber contacts with each other, and has a similarly effect equally.
Another benefit is, resin bridges or to converge body fastened to each other and the perforate between the fiber fixed with fiber provides more accurate with consistent aperture size like this. Whole service life of filter medium the mesoporous size will keep constant.
The performance of filter medium of the present invention and the filter medium produced by the inventive method can be controlled by change condition and material.
Resin enters the speed and the permeability of base material and can control by the viscosity that changes coating.The solids content of coating can change, thereby changes the thickness of the film of encapsulate yarn or fiber.
The performance of the resin that is used to apply is preferably controlled by means of dilution and rheology modifier (it changes the resin flow characteristic) according to the character of base material.
In an example, with pure (unmodified) resin of first sample coating of 373gm-2 nylon 66 monofilament double-layer woven cloths, this resin comprises 60% solid, 40% solvent and has the viscosity of 200cps.
Discovery has excessive glue-spread and low permeability, this be since little monofilament yarn surface by thick resin bed encapsulate.
Second sample coating of this cloth is diluted to 10% solid, has the resin than low viscosity (approximately 20cPs).This resin infiltration is by whole cloth thickness and cause not enough glue-spread, and the yarn quilt is encapsulate by halves.
The 3rd sample of this cloth applies the resin compound of special preparation.
This resin sample, prepares by the hydroxyethylcellulose thickening of adding as rheology modifier (promptly changing the resin flow characteristic) to 10% solids content then by letdown resin.The hydroxyethylcellulose rheology modifier is prepared according to Manufacturing Instruction in advance, and adds lentamente under strong agitation in the resin of dilution, reaches the rheology modifier of 3% weight in resin compound.The viscosity that is coated to the mixture of the 3rd cloth sample is 4500cps.The fabric that applies is cured with common mode baking oven by 160 ℃ in one way, and the time of staying is 10 minutes.
By using rheology modifier and letdown resin, find that resin system has the viscosity of the solids content that is beneficial to the best that improves wearability and the best that is beneficial to the base material infiltration, the loss minimum of base material compliance and permeability simultaneously.
| Sample 1 | |
Sample 3 | |
| Base material | 373gm-2 nylon 66 monofilament double-layer woven cloths | With sample 1 | With sample 1 |
| Resin | 60 |
10 |
10% solids content |
| Rheology modifier | Do not have | Do not have | Hydroxyethylcellulose |
| Viscosity | 200cPs | 20cPs | 4500cPs |
| Permeability | Low | High | Good |
| Encapsulate | It is excessive that thick coating applies | The coating infiltration of difference is by the amount of resin of fabric deficiency | Good encapsulate does not have blocked up |
Drying condition can determine fiber by the mode of encapsulate or degree, makes that the coating migration is less short drying time.
With respect to for example EPA 0,741,815, advantage of the present invention comprises: one way can be provided in the coating of variable depth in the base material, and, if necessary, by fabric can be applied whole base material substrate with the liquid-phase resin thorough impregnation.Use the method for described European patent,, must resin be coated to each side respectively with repetition methods if improve the wearability of fabric.
Above-mentioned result of the test shows that the inventive method changes the filtration throughput of filter medium indistinctively.The permeability of air and liquid only reduces slightly.In addition, therefore the inventive method can be used for low-surface-energy material, for example polypropylene owing to can seal single fiber.The coating that method by described European patent applies can be easily from this class sur-face peeling, because it can not be adhered on this class surface.
Because length of penetration is big, described coating is nonvolatil, and in the length of life of cloth, the remaining coating in the entire depth of coating and cloth will be resisted wearing and tearing constantly.
The yarn of base cloth or the hole between the fiber are not coated basically to be stopped, as what air penetrability proved, and these can be filled by cohesion known in the art, flocculation or microporosity foamed material, to give described filter medium with microporosity.Filter medium of the present invention can be used for any liquid or gas filtration is used, be used for jar, tin and disk filter sleeve and bag as filter cloth, perhaps be used for other filters, and conveyer belt, dewatering of pulp band, corrugating roll mill band, tower press band and filter press cloth.
Claims (17)
1. be used to make the method for filter medium, it comprises with the thermosetting resin dipping weaves or nonwoven substrates, the solidification temperature that is heated to employed resin by the base material with described dipping makes described thermosetting resin cured subsequently, use the yarn or the fiber of the described base material of described resin encapsulate whereby, make described yarn or fiber they contact with each other the place bonded to each other, it is characterized in that, described resin mixed with rheology modifier before dipping, with viscosity and the flow behavior of controlling described resin.
2. the process of claim 1 wherein that described resin was diluted in the past and is lower than 15% solids content adding rheology modifier.
3. claim 1 or 2 method, wherein said rheology modifier accounts for below 5% weight of described resin combination.
4. claim 1 or 2 method, wherein said rheology modifier comprises hydroxyethylcellulose.
5. claim 1 or 2 method, wherein said thermosetting resin is to be selected from the following any resin or the mixture of any two or more resins: phenolic aldehyde, epoxy, formaldehyde, amino furans, melamine, siloxanes, unsaturated polyester (UP), polyurethane, polyamide, fluorocarbons or based on the thermosetting resin of crosslinked thermoplastic.
6. claim 1 or 2 method, wherein said base material is to weave or supatex fabric, it comprises spunbond heat bonding or meltblown polymer yarn or fiber.
7. the method for claim 6, wherein said polymer yarns or fiber are following any or two or more blends: polyester, polypropylene, polyamide, polyethylene or polyurethane.
8. the method for claim 6, wherein said base material comprises metal or ceramic filter screen.
9. through middle heating, with except that anhydrating or other solvents, wherein heating-up temperature is lower than the temperature of described curing before solidifying for claim 1 or 2 method, the fabric of wherein said dipping.
10. filter medium, it comprises weaving or the base material of supatex fabric with thermosetting resin dipping, described thermosetting resin is cured by subsequently the base material of described dipping being heated to solidification temperature, it is characterized in that, described resin mixed with rheology modifier before dipping, with viscosity and the flow behavior of controlling described resin.
11. being diluted in the past at the described rheology modifier of interpolation, the filter medium of claim 10, wherein said resin be lower than 15% solids content.
12. the filter medium of claim 10, wherein said rheology modifier account for below 5% weight of described resin combination.
13. the filter medium of claim 10 or 11, wherein said rheology modifier comprises hydroxyethylcellulose.
14. the filter medium of claim 10 or 11, wherein said thermosetting resin are to be selected from the following any resin or the mixture of any two or more resins: phenolic aldehyde, epoxy, formaldehyde, amino furans, melamine, siloxanes, unsaturated polyester (UP), polyurethane, polyamide, fluorocarbons or based on the thermosetting resin of crosslinked thermoplastic.
15. the filter medium of claim 10 or 11, wherein said base material are to weave or supatex fabric, it comprises spunbond, heat bonding or meltblown polymer yarn or fiber.
16. the filter medium of claim 15, wherein said polymer yarns or fiber are following any or two or more blends: polyester, polypropylene, polyamide, polyethylene or polyurethane.
17. the filter medium of claim 15, wherein said base material comprise the filter screen of metal or pottery.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0104748.9 | 2001-02-27 | ||
| GBGB0104748.9A GB0104748D0 (en) | 2001-02-27 | 2001-02-27 | Improved filter media |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1531453A CN1531453A (en) | 2004-09-22 |
| CN100421766C true CN100421766C (en) | 2008-10-01 |
Family
ID=9909541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028089650A Expired - Fee Related CN100421766C (en) | 2001-02-27 | 2002-02-19 | Improved resin impregnated filter media |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20050032445A1 (en) |
| EP (1) | EP1390120A1 (en) |
| CN (1) | CN100421766C (en) |
| BR (1) | BR0207541A (en) |
| CA (1) | CA2439617A1 (en) |
| GB (1) | GB0104748D0 (en) |
| PL (1) | PL365331A1 (en) |
| WO (1) | WO2002068089A1 (en) |
| ZA (1) | ZA200306675B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10357197A1 (en) * | 2003-12-08 | 2005-07-07 | Herding Gmbh Filtertechnik | Filter element with heat resistance and / or chemical resistance |
| KR100678338B1 (en) | 2005-07-15 | 2007-02-05 | (주)크린앤사이언스 | Filter element for cleaning air and process for preparing the same |
| KR20070067884A (en) * | 2005-12-26 | 2007-06-29 | (주)크린앤사이언스 | Filter element for cleaning air and process for preparing the same |
| CN104955543A (en) * | 2012-12-18 | 2015-09-30 | Fl史密斯公司 | Filtration media and methods of manufacturing thereof |
| CN103599664A (en) * | 2013-10-30 | 2014-02-26 | 中国第一汽车股份有限公司 | Preparation method of ultrafine oxygen-containing inorganic fiber bundles reinforced by aldehyde resin |
| CN103599665B (en) * | 2013-10-30 | 2015-04-22 | 中国第一汽车股份有限公司 | Preparation method of hydrocarbon resin reinforced ultrafine carbon fiber bundles |
| CN104383751A (en) * | 2014-11-04 | 2015-03-04 | 厦门三维丝环保股份有限公司 | Stiffening filter material structure for high-temperature-resistant filter drum |
| CN105625042A (en) * | 2014-11-04 | 2016-06-01 | 厦门三维丝环保股份有限公司 | High temperature resistant filter cartridge substrate filter material stiffening finishing method |
| CN114159890A (en) * | 2021-11-17 | 2022-03-11 | 安徽元琛环保科技股份有限公司 | Preparation method of high-wear-resistance dedusting filter material |
| CN115467106B (en) * | 2022-08-25 | 2023-08-29 | 东华大学 | Multifunctional solution impregnating and foaming integrated device for preparing porous yarns |
| WO2024178315A1 (en) * | 2023-02-24 | 2024-08-29 | Schlumberger Technology Corporation | Solids separation screen with patterned encapsulation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4515848A (en) * | 1983-09-23 | 1985-05-07 | Gates Formed Fibre Products Inc. | Materials and methods for making resin-rigidified articles |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3251727A (en) * | 1961-08-17 | 1966-05-17 | Riegel Textile Corp | Laminated breathable textile product and method of manufacturing same |
| US3523408A (en) * | 1968-04-02 | 1970-08-11 | Pall Corp | Gas separator |
| US3463689A (en) * | 1968-06-07 | 1969-08-26 | Sheller Globe Corp | Method of forming filters from fibrous material |
| US5393840A (en) * | 1993-11-01 | 1995-02-28 | Eastman Chemical Company | Thermosetting coating compositions |
| US5928414A (en) * | 1996-07-11 | 1999-07-27 | W. L. Gore & Associates, Inc. | Cleanable filter media and filter elements |
| CA2301905A1 (en) * | 1997-09-11 | 1999-03-18 | Toray Industries, Inc. | Fabric |
| US6103643A (en) * | 1998-07-15 | 2000-08-15 | E. I. Du Pont De Nemours And Company | High performance fabrics for cartridge filters |
| EP1317516B1 (en) * | 2000-09-14 | 2006-02-15 | Rohm And Haas Company | Aqueous dispersions of comb copolymers and coatings produced therefrom |
-
2001
- 2001-02-27 GB GBGB0104748.9A patent/GB0104748D0/en not_active Ceased
-
2002
- 2002-02-19 EP EP02700436A patent/EP1390120A1/en not_active Withdrawn
- 2002-02-19 WO PCT/GB2002/000713 patent/WO2002068089A1/en not_active Application Discontinuation
- 2002-02-19 BR BR0207541-5A patent/BR0207541A/en not_active IP Right Cessation
- 2002-02-19 CN CNB028089650A patent/CN100421766C/en not_active Expired - Fee Related
- 2002-02-19 US US10/468,969 patent/US20050032445A1/en not_active Abandoned
- 2002-02-19 PL PL02365331A patent/PL365331A1/en not_active Application Discontinuation
- 2002-02-19 CA CA002439617A patent/CA2439617A1/en not_active Abandoned
-
2003
- 2003-08-27 ZA ZA200306675A patent/ZA200306675B/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4515848A (en) * | 1983-09-23 | 1985-05-07 | Gates Formed Fibre Products Inc. | Materials and methods for making resin-rigidified articles |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002068089A1 (en) | 2002-09-06 |
| EP1390120A1 (en) | 2004-02-25 |
| PL365331A1 (en) | 2004-12-27 |
| US20050032445A1 (en) | 2005-02-10 |
| CN1531453A (en) | 2004-09-22 |
| BR0207541A (en) | 2004-03-09 |
| GB0104748D0 (en) | 2001-04-18 |
| ZA200306675B (en) | 2004-04-29 |
| CA2439617A1 (en) | 2002-09-06 |
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