CN1565700A - Felt materials for bag filter - Google Patents
Felt materials for bag filter Download PDFInfo
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- CN1565700A CN1565700A CN 03140722 CN03140722A CN1565700A CN 1565700 A CN1565700 A CN 1565700A CN 03140722 CN03140722 CN 03140722 CN 03140722 A CN03140722 A CN 03140722A CN 1565700 A CN1565700 A CN 1565700A
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- fibre
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- felt materials
- silica fibre
- bag filter
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Abstract
The invention provides a felt material which can collect coal dust from a heating equipment. The making process comprises the following steps: integrating the silica fiber, the fiber sheet into the base cloth by needle punching method, immersing the base cloth in fluoro resin containing disperse liquid, and forming convex structure on the surface of the felt fibre.
Description
Technical field
The present invention relates to capture effectively the bag filter of the coal dust that incinerator and boiler at high temperature emit or the felt materials of under other hot environments, using.
Background technology
In Japan, prevent method by atmosphere pollution, discharge standard for the incinerator of municipal refuse and trade waste and the coal dust of kiln or briquette boiler, stipulate by its scale, thus be installed in the outlet dust content of the bag filter in the deduster need be controlled at discharge below the mark.This dusty gas, the gas temperature height, and contain a lot of acidic materials, need have heat-resisting, acid resistance so be installed in the bag filter of this hot equipment.Therefore, fabric or needle punched felt materials such as the general polytetrafluoroethylene fibre (PTFE fiber) that uses heat-resisting, acid-proof of the material of bag filter, polyphenylene sulfide fiber (PPS fiber), polyimide fiber, aramid fibre.
In recent years, the base material of hear resistance felt materials has obtained further improvement, in Japanese patent laid-open publication gazette 2-14456 number and Japanese patent laid-open publication gazette 2-36704 number, propose, PTFE fiber and fiber number are after the thin glass fiber of 0.1～1 danier cooperates, to make its incorporate compound felt materials with needle point method.In addition, propose in No. 2594844, the Japan Patent, in the hear resistance organic fiber, sneak into glass fibre, PPS fiber, aramid fibre, PTFE fiber etc. are arranged as the organic fiber that adds.
Summary of the invention
In the felt materials of in bag filter, using, as aforementioned glass fibre of sneaking into a part, though reduced prime cost, but because glass fibre easy deterioration in acid atmosphere, therefore handle when containing the dusty gas of volume acidic materials, just need carry out frequent filter within a short period of time and change, its result is also uneconomical.In addition, glass fibre is hard and crisp, comes off so fracture easily in combing and the needling process, thereby causes the deterioration of felt processing operating environment.Glass fibre is because each fiber is straight firmly, so may stimulate felt processor's skin.
The object of the present invention is to provide felt materials, improve relevant foregoing problems of in felt materials, sneaking into glass fibre, be better than the silica fibre of glass fibre by the acidproof and hear resistance of main use, when in high temperature environment such as bag filter, using, compare with material in the past, the durable years of its felt materials is quite long.Another object of the present invention provides the felt materials of improving the felt processing environment.To provide the arresting efficiency of filter residues such as coal dust high and do not cause the felt materials of obstruction for another purpose among the present invention.
In order to achieve the above object, felt materials of the present invention, be suitable for conditions such as needed corrosion-resistant, the hear resistance of bag filter, be from fibrillation, to remove the silica fibre that burns till behind soluble component or the organic principle, be about more than 250 ℃ with fusing point or do not have the fibre plate that the hear resistance organic fiber of fusing point is formed, be clipped in wherein by the base cloth that becomes with the silk weaving that contains silica fibre, utilize needle point method to reach integrated.The felt materials that obtains has at last reached thickness and the density stipulated by heat treatment.
Felt materials of the present invention, the substrate for silica fibre and hear resistance organic fiber are formed utilizes needle point method to reach integrated, and then can flood the dispersion liquid of fluorine resin and make.The felt materials that obtains forms convex structure at fiber surface.
Felt materials of the present invention for the fibre plate that is made of silica fibre and hear resistance organic fiber, utilizes needle point method to make it integrated after adding the base cloth that becomes with the silk weaving that contains silica fibre, and then the dispersion liquid of dipping fluorine resin and making.The felt materials that obtains forms convex structure at fiber surface.
About felt materials of the present invention, base cloth preferably uses the fabric that contains silica fibre a kind of or and with containing the fabric of silica fibre and the fabric of hear resistance organic fiber.In containing the fabric of silica fibre, about 10～50 weight % that preferably constitute the silk of this fabric are silica fibre, remain to be the hear resistance organic fiber.
In the present invention, the silica fibre that uses in felt main body and base cloth mainly is to remove to burn till behind soluble component and the organic principle and make from the fibrillation of glass fibre.The silica fibre that is fit to has short fiber or the long fibre of making from E glass, sodium quartz glass, pyrex, sodium silicate glasses or soda-lime glass etc., and this fiber is by burning till the skeleton structure that forms silicon after the acid treatment stripping soluble component.
Description of drawings
The amplification profile diagram of the fibre plate that Fig. 1 uses among the present invention for expression.
Fig. 2 is for being used for the amplification profile diagram of the felt materials of bag filter among expression the present invention.
Fig. 3 is the amplification profile diagram of the variation of expression felt materials.
Fig. 4 has amplified its surperficial part in the drawings for the sectional drawing of the 2nd variation of expression felt materials.
Fig. 5 has amplified its surperficial part in the drawings for the sectional drawing of the 3rd variation of expression expression felt materials.
The specific embodiment
In felt materials 1, felt materials main body and the silica fibre 2 (Fig. 1) that uses in base cloth are also referred to as the silex glass fiber, burn till remove soluble component and organic principle from fibrillation after.Such as, as silica fibre 2, make short fibers such as E glass, sodium quartz glass, pyrex, soda-lime glass by blow moulding, this short fiber is removed the skeleton structure of burning till silicon behind the soluble component by acid treatment, and for example the content of silicon reaches more than 95%.Generally, as fibrillation, preferably use the E glass fibre in the borosilicate glass of alkali content below 1%, for example, Nippon Muki KK (Japan) etc. is producing, or the silica fibre (article number: FY-6) of Ji Ye Co., Ltd. (Japan) sale.
In order to obtain silica fibre 2, adjusted the silicate base that is suitable for spinning viscosity and carried out fibrillatable, and then burnt till after can removing the alkali composition by acid-treated mode by nozzle.In addition, adjust viscosity by polymerization alcoxyl silicon solution and make spinning, from the living fiber that obtains, remove burn till behind the organic principle also passable.In these long fibres, usually preferably add behind the filler severing and become specific length and use, for example, エ Application カ society or Asahi Glass Co., Ltd (Japan) are producing.
The acid resistance of silica fibre 2 and hear resistance are than common glass fibre height.These silica fibres are porous fibers of essence, and the flexibility also glass fibre than common is strong, with proportion be that about 2.5 glass fibre is quite lighter than the weight of this fiber.In addition, coefficient of thermal expansion is low to 1/10 of glass fibre, and therefore its dimensional stability is very good for felt materials.Also have, the electric insulating quality of silica fibre is well more a lot of than common glass fibre, and dielectric constant and dielectric tangent value are also very low.
On the one hand, employed organic fiber 3 (Fig. 1) is soft heat resistant fibre among the present invention, and it needs fusing point to be higher than 250 ℃ or do not have fusing point.Felt materials among the present invention, if when being installed in the bag filter of working under the hot environment, because the temperature of dusty gas has reached about 200 ℃ in the most of the time, so if its durability reduces after when the fusing point of hear resistance organic fiber does not reach 250 ℃.So-called in addition " no fusing point " when being meant heating decomposition temperature lower than melt temperature and the fiber of fusing point test difficulty just is difficult for thermal decomposition when this fiber is heated to 250 ℃.
The about organic fiber 3 more than 250 ℃ of fusing point has, PTFE (327 ℃ of fusing points), PPS fiber (287 ℃ of fusing points), a benzenedicarboxamide fiber (325 ℃ of fusing points), polyetheretherketonefiber fiber (345 ℃ of fusing points), 66 nylon fibers (250～160 ℃ of fusing points), polyester fiber (255～260 ℃ of fusing points) heterocycle fiber etc.The hear resistance organic fiber of no fusing point has, polyimide fiber (the vitrifying inversion temperature is 315 ℃), poly P phenylene terephathalamide fiber, poly fiber, copolymerization aromatic arginyl amine fiber etc.In addition, also have the composite fibre of these fibers and the form of composite fibre.
As shown in fig. 1, silica fibre 2 and hear resistance organic fiber 3 are made fleece mutually or are used independent each fiber to make fleece after the mixed cotton, and can form lamination according to different purposes is 100～1000g/m
2Fibre plate 5 and 5 '.As shown in Figures 2 and 3, in the felt materials main body of fibre plate 5, sandwich base cloth 6 dimensional stability of felt materials 1 is increased, as shown in Figure 4 and Figure 5, dipping fluorine resin dispersion liquid has obtained fluorine resin adhesion layer 7, therefore forms fine convex structure on the surface that constitutes fiber 9.In addition, as shown in Figure 5, sandwich base cloth 6 in the felt materials main body, and then the dispersion liquid of dipping fluorine resin is fine also.
In base cloth 6, can use composite filament weave cotton cloth and short fiber weave cotton cloth.Base cloth 6 is as long as use contains the fabric of silica fibre or also just passable with the fabric of fabric that contains silica fibre and stable on heating organic fiber.For the fabric that contains silica fibre, silica fibre accounts for 10～50 weight %, fiber except silica fibre is stable on heating organic fiber, silica fibre is during less than all 10 weight %, can not get felt materials in the base cloth dimensional stability and fixed hear resistance, on the other hand, when the content of silica fibre surpasses 50 weight %, not only cost increases but also the rerum natura of felt materials also can not get optimizing, so also be uneconomic on the cost problem.
In addition, as shown in Figures 4 and 5, in unilateral or two sides, form the adhesion layer 7 of fluorine resin in the process of resin of fluorine resin, wherein may form fine convex structure 8 in the surface of the formation fiber 9 in the felt materials 10.This fluorine resin generally uses the PTFE resin, and the concentration of the aqueous liquid dispersion of PTFE is about 60 weight %, adds non-ionic surface active agent usually and makes it stable.Employed fluorine resin, can be the hot-melt type of tetrafluoroethene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethene-hexafluoropropylene copolymer (FEP), polychlorotrifluoroethylene (PCTFE), tetrafluoroethylene-ethylene copolymer (ETFE), polyvinyl fluoride (PVF) etc., or be dispersed in the dispersion liquid in water or the organic solvent.
The dipping of fluorine resin dispersion liquid is undertaken by the spraying that utilizes dipping, coating, spray gun etc.Add dispersion liquid after super-dry, sintering, obtained in felt materials 10, constituting the convex structure 8 that disperses to form fluorine resin on the surface of fiber 9.Because there is fine convex structure in the fiber surface of felt materials, therefore improves the screening resistance effect and the arresting efficiency of filter residue in the coal dust, nor cause the obstruction of filter residue easily.
Embodiment
Below, embodiments of the invention are described, but the present invention is not subjected to the restriction of embodiment.
The fleece that uses among the present invention, as shown in Figure 1, by even mixing fiber number PTFE fiber 1 (trade name: ト ヨ Off ロ ン beautiful Co., Ltd. of, East (Japan) makes) 70 weight % that are 6.7 daniers and fibre diameter is that silica fibre 2 (Nippon Muki KK's manufacturing) the 30 weight % of 6 μ m make.Then, this fleece lamination being formed substance is 410g/m
2Fibre plate 5.
As shown in Figure 2,, and add between the fibre plate 5 ', 5 ' of 2 equal portions that 2 pieces of composite filaments that contain silica fibre as base cloth 6 are weaved cotton cloth and the composite filament fiber weaving cloth of PTFE fiber (trade name: the beautiful Co., Ltd. of ト ヨ Off ロ ン, East) with the several 300/cm of the crown
2Carry out acupuncture.Silica fibre accounted for 50 weight % during the composite filament that contains silica fibre was weaved cotton cloth, and remaining 50 weight % are carbon fiber.2 pieces of substances of weaving cotton cloth are 240g/m
2Then, heat-treating on the tentering plate 3 minutes under 300 ℃, having obtained substance is 650g/m
2, thickness is 1.1mm, venting quality is 14ml/cm
2The felt materials 1 of second.
The percent thermal shrinkage of the felt materials 1 that obtains (at 240 ℃, 24 hours) is vertical 2.1%, horizontal 1.0%.Thermal stretching rate (230 ℃, 1 hour) is 0.5%.
It below is the condition determination of the arresting efficiency of felt materials 1.
Rate of filtration 3m/ branch
Dirt kind off-white color fusion alumina (particle mean size: 4 μ m)
Duration of test 2300 seconds (100 fluctuation)
As a result, the arresting efficiency of felt materials 1 has reached 99.99%.
In order to measure the leaching effect of felt materials 1, having made diameter with this felt materials is 130mm, and length is the bag filter of 6.0m, is installed on Urban dust and burns in the precipitron of usefulness.The operating condition of this precipitron is, 190～210 ℃ of gas temperatures, and rate of filtration 1m/ branch has carried out intermittent operation.In the dusty gas, contain 50% moisture, the hydrogen chloride of 400ppm, the SO of 100ppm
X
Above precipitron operation after 7 months, in bag filter and do not find to occur any problem.The pressure loss of used bag filter is 1.6kPa.
Embodiment 2
Fiber number be 0.6～6 danier (average 2.2 daniers) 80 weight %PTFE fibers (trade name: プ ロ Off イ レ Application, レ Application チ Application society are made) and, fibre diameter is to manufacture fleece after the 20 weight % silica fibres (Nippon Muki KK's manufacturing) of 6 μ m mix.Secondly, this fleece formation substance of lamination is 480g/m
2Fibre plate.
Between the fibre plate 5 ', 5 ' of 2 equal portions, sandwich that to contain substance be 120g/m
2The composite filament of the silica fibre base cloth 6 of weaving cotton cloth, and with the several 320/cm of the crown
2Carry out acupuncture.40 weight % were silica fibre during the composite filament that contains silica fibre was weaved cotton cloth, and 60 remaining weight % are carbon fiber.Then, under 300 ℃ after heat-treating 3 minutes on the tentering plate, having obtained substance is 600g/m
2, thickness is 1.1mm, venting quality is 18ml/cm
2The felt materials 1 of second.
The percent thermal shrinkage of the felt materials that obtains has reached (at 240 ℃, 24 hours) vertical 2.0%, horizontal 0.6%.Thermal stretching rate (at 230 ℃, 1 hour) reaches 0.4%.
Under condition similarly to Example 1, measure the arresting efficiency of felt materials.As a result, the arresting efficiency of felt materials has reached 99.98%.
In order to measure the leaching effect of felt materials, having made diameter with this felt materials is 116mm, and length is the bag filter of 3.6m, is installed on the industry Litter and burns with in the precipitron.The operating condition of this precipitron is 180～200 ℃ of gas temperatures, rate of filtration 1.2m/ branch.
Any problem after 12 months, is not taken place in above precipitron running in the bag filter.The pressure loss of used bag filter is 1.5kPa.
Embodiment 3
With fiber number is that PPS fiber (trade name: the beautiful Co., Ltd. of ト Le コ ン, East makes) the 70 weight % and the fibre diameter of 2 daniers is silica fibre (Nippon Muki KK's manufacturing) the 30 weight % of 6 μ m, makes its even mixed cotton and manufactures fleece.Then, this fleece formation substance of lamination is 430g/m
2Fibre plate.
Between the fibre plate 5 ', 5 ' of 2 equal portions, sandwich that to contain substance be 120g/m
2The composite filament of the silica fibre base cloth of weaving cotton cloth, and with the several 300/cm of the crown
2Carry out acupuncture.20 weight % were silica fibre during the composite filament that contains silica fibre was weaved cotton cloth, and 80 remaining weight % are the PPS fiber.Then, heat-treating on the tentering plate 3 minutes under 220 ℃, obtaining substance is 550g/m
2, thickness is 1.5mm, venting quality is 17ml/cm
2The felt materials 1 of second.
Measure the arresting efficiency of felt materials under the condition similarly to Example 1.As a result, the arresting efficiency of felt materials has reached 99.99%.
In order to measure the leaching effect of felt materials, having made diameter with this felt materials is 116mm, and length is the bag filter of 3.6m, is installed on the industry Litter and burns with in the precipitron.The operating condition of this precipitron is 160～180 ℃ of gas temperatures, rate of filtration 1.3m/ branch.
Any problem after 12 months, is not taken place in above precipitron running in the bag filter.The pressure loss of used bag filter is 1.5kPa.
Embodiment 4
With fiber number is that (trade name: ト Le コ Application) 70 weight % and fibre diameter are silica fibre (Nippon Muki KK's manufacturing) the 30 weight % of 6 μ m, evenly mix and manufacture fleece for the PPS fiber of 2 daniers.Then, this fleece formation substance of lamination is 430g/m
2Fibre plate.
The fibre plate 5 ' of 2 equal portions, 5 ' between, sandwich that to contain substance be 120g/m
2The composite filament of the silica fibre base cloth of weaving cotton cloth, and with the several 320/cm of the crown
2Carry out acupuncture.40 weight % were silica fibre during the composite filament that contains silica fibre was weaved cotton cloth, and remaining 60 weight % is anti-flammability 66 nylon fibers.Then, heat-treated 3 minutes on 210 ℃ of drop-down formers, obtaining substance is 550g/m
2, thickness is 1.5mm, venting quality is 19ml/cm
2The felt materials 1 of second.
The arresting efficiency of the felt materials that measures under the condition similarly to Example 1.As a result, the arresting efficiency of felt materials has reached 99.98%.
In order to measure the leaching effect of felt materials, be 116mm with having made diameter in this felt materials, length is the bag filter of 3.6m, is installed on the industry Litter and burns with in the precipitron.The operating condition of this precipitron is 160～180 ℃ of gas temperatures, rate of filtration 1.3m/ branch.
Any problem did not take place after 12 months in above precipitron running in the bag filter.The pressure loss of used after-filter is 1.5kPa.
For the fiber surface of the felt materials 1 made in embodiment 2 forms fine convex structure, this felt materials was flooded 1 minute in the dispersion liquid of PTFE resin.The concentration of PTFE resin is 60 weight % in the aqueous liquid dispersion, adds the purpose that non-ionic surface active agent has reached stabilisation here.The felt materials 10 (Fig. 5) that obtains is at the about 20g/m of dipping PTFE resin dispersion liquid
2After, the fine convex structure 8 dry, that sintering has formed the fluorine resin on full surface.
There is fine male structure 8 in felt materials 10 by full surface, can improve the filter effect and the arresting efficiency of filter residue in the coal dust.In the felt materials 10, filter residue is not easy to stop up, and the filter residue of leaching also is easy to come off.So service life of having improved bag filter.
For the fiber surface of the felt materials 1 made in embodiment 4 forms fine convex structure 8, this felt materials was flooded 1 minute in the dispersion liquid of PFA resin.In aqueous liquid dispersion, the concentration of PFA resin is 60 weight %, adds non-ionic surface active agent here and has reached stabilisation.The felt materials 10 (Fig. 5) that obtains is the about 20g/m of dipping PTFE resin dispersion liquid
2After, the fine convex structure 8 dry, that sintering has formed the fluorine resin on full surface.
There is fine male structure in felt materials 10 by fiber surface, has improved the filter effect and the arresting efficiency of filter residue in the coal dust.In the felt materials 10, filter residue is not easy to stop up, and the filter residue of leaching also is easy to come off.So service life of having improved bag filter.
The invention effect
Felt materials of the present invention, the fibre plate that has used silica fibre and hear resistance organic fiber to be formed, and added the base cloth that the silk weaving that contains silica fibre becomes.Silica fibre and common glass fibre ratio, low weight and thermal expansion efficient is low, acid resistance and hear resistance are very high and soft.Therefore, the felt materials among the present invention has good dimensional stability and also be difficult for performance such as deterioration in acid atmosphere, also can use for a long time when handling the dusty gas that contains the volume acidic materials.Felt materials of the present invention can not exchange more than 2 years when using in the bag filter in various hot equipment, can save personnel and time in the exchange work yet.For felt materials of the present invention, the silica fibre price is more expensive than glass fibre, still than the PTFE fiber ratio or the low price of high valency, has reduced the use amount of PTFE fiber so in all directions, and is therefore both economical.
Felt materials among the present invention, by in felt materials main body and base cloth, containing silica fibre, thus all soft, so difficult drop-off fiber in combing and the acupuncture operation.So can keep good working environment in the felt processing, also can not be similar to the situation of the chafe etc. of worker in the glass fibre.
In the felt materials of the present invention, form fine convex structure at fiber surface behind the dispersion liquid of dipping fluorine resin, therefore optimized the filter effect and the arresting efficiency of filter residue in the coal dust.When the fiber surface of fluorine resin forms convex structure, be difficult for like this causing the obstruction that causes by filter residue, and the filter residue of leaching also is easy to come off.Fiber surface has the felt materials of convex structure, increases dimensional stability during use, therefore may more long-term use, and the strength retention of bag filter also can be maintained to many decades.
Claims (6)
1. corrosion-resistant, stable on heating felt materials that has that is applicable to bag filter etc., for from fibrillation, removing the silica fibre that burns till behind soluble component and the organic principle, about more than 250 ℃ or do not have a fibre plate that the hear resistance organic fiber of fusing point is formed with fusing point, sandwich the base cloth that becomes with the silk weaving that contains silica fibre, utilize needle point method to make its integral body integrated, and reach the thickness and the density of regulation by heat treatment.
2. corrosion-resistant, stable on heating felt materials that has that is applicable to bag filter etc., will be for from fibrillation, removing the silica fibre that burns till behind soluble component and the organic principle, about more than 250 ℃ or do not have a fibre plate that the hear resistance organic fiber of fusing point is formed with fusing point, make it integrated with needle point method, and reach the thickness and the density of regulation by heat treatment, and then, on fiber surface, form convex structure by flooding the dispersion liquid of fluorine resin.
3. corrosion-resistant, stable on heating felt materials that has that is applicable to bag filter etc., by from fibrillation, removing the silica fibre that burns till behind soluble component and the organic principle, about more than 250 ℃ or do not have in the base material that the hear resistance organic fiber of fusing point formed with fusing point, sandwich the base cloth that becomes with the silk weaving that contains silica fibre, make its integral body integrated by the acupuncture mode, and reach the thickness and the density of regulation by heat treatment, and then, on fiber surface, be formed with convex structure by flooding the dispersion liquid of fluorine resin.
4. according to claim 1 or 3 described felt materials, wherein said base cloth is use the fabric that contains silica fibre separately, or also usefulness to contain the fabric of silica fibre and the fabric of hear resistance organic fiber.
5. according to claim 1,3 or 4 described felt materials, about 10～50 weight % that wherein constitute the silk that contains the silica fibre fabric are silica fibres.
6. according to each described felt materials in the claim 1 to 5, wherein as the silica fibre that in felt main body and base cloth, uses, from short fiber or the long fibre that E glass, sodium silex glass, pyrex, alkali silicate glasses or soda-lime glass are made, this fiber is by burning till the skeleton structure that forms silicon after the acid treatment stripping soluble component.
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| CNB031407226A CN100386132C (en) | 2003-06-12 | 2003-06-12 | Felt materials for bag filter |
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| CNB031407226A CN100386132C (en) | 2003-06-12 | 2003-06-12 | Felt materials for bag filter |
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| CN1565700A true CN1565700A (en) | 2005-01-19 |
| CN100386132C CN100386132C (en) | 2008-05-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512878A (en) * | 2011-12-28 | 2012-06-27 | 南京际华三五二一特种装备有限公司 | Dust removal and waste gas decomposition double-effect filter material and preparation method thereof |
| CN105126455A (en) * | 2015-09-07 | 2015-12-09 | 中材金晶玻纤有限公司 | Preparation method for glass fiber filtering felt for processing exhaust gas denitration |
| CN114075791A (en) * | 2021-12-06 | 2022-02-22 | 浙江圆融科技有限公司 | Production method of novel fireproof fabric |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837212A (en) * | 2010-05-26 | 2010-09-22 | 宋朋泽 | Polyphenylene sulfide glass fiber composite filter material and method for preparing same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4361619A (en) * | 1981-05-20 | 1982-11-30 | E. I. Du Pont De Nemours And Company | Filter of poly(tetrafluoroethylene) and glass fibers |
| US4687720A (en) * | 1984-12-21 | 1987-08-18 | Hughes Aircraft Company | Side lobe suppression in holograms using pre-exposure |
| JP2594844B2 (en) * | 1991-03-05 | 1997-03-26 | 日本フエルト工業株式会社 | Heat resistant needle felt filter material |
| CN1057710C (en) * | 1998-10-28 | 2000-10-25 | 营口玻璃纤维有限公司 | Multi-function glass fibre composite filter material and making method |
| CN1156327C (en) * | 2001-08-15 | 2004-07-07 | 余国藩 | Compound spiked felt of purifying industrial smoke and its producing method |
-
2003
- 2003-06-12 CN CNB031407226A patent/CN100386132C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512878A (en) * | 2011-12-28 | 2012-06-27 | 南京际华三五二一特种装备有限公司 | Dust removal and waste gas decomposition double-effect filter material and preparation method thereof |
| CN102512878B (en) * | 2011-12-28 | 2013-10-09 | 南京际华三五二一特种装备有限公司 | Dust removal and waste gas decomposition double-effect filter material and preparation method thereof |
| CN105126455A (en) * | 2015-09-07 | 2015-12-09 | 中材金晶玻纤有限公司 | Preparation method for glass fiber filtering felt for processing exhaust gas denitration |
| CN114075791A (en) * | 2021-12-06 | 2022-02-22 | 浙江圆融科技有限公司 | Production method of novel fireproof fabric |
| CN114075791B (en) * | 2021-12-06 | 2023-11-21 | 浙江圆融科技有限公司 | Novel production method of fireproof fabric |
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| CN100386132C (en) | 2008-05-07 |
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