CN104233817A - Modified PPS (polyphenylene sulfide) and PTFE (polytetrafluoroethylene) layered coating method for glass fiber filter material - Google Patents
Modified PPS (polyphenylene sulfide) and PTFE (polytetrafluoroethylene) layered coating method for glass fiber filter material Download PDFInfo
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- CN104233817A CN104233817A CN201410481719.1A CN201410481719A CN104233817A CN 104233817 A CN104233817 A CN 104233817A CN 201410481719 A CN201410481719 A CN 201410481719A CN 104233817 A CN104233817 A CN 104233817A
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- polyphenyl thioether
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Abstract
A modified PPS (polyphenylene sulfide) and PTFE (polytetrafluoroethylene) layered coating method for a glass fiber filter material comprises the following steps: glass fiber needled base cloth is selected and prepared into filter material base cloth after carding, lapping and needling processes; linear PPS and hyperbranched PPS are mixed to prepare modified PPS emulsion; the modified PPS emulsion, PTFE emulsion and a fluorine-containing silane coupling agent are mixed to prepare priming paint; the PTFE emulsion, the fluorine-containing silane coupling agent and F46 emulsion are mixed to prepare surface paint; the filter material base cloth is dipped in the priming paint and subjected to high-temperature curing and furnace cooling to prepare a bottom layer; and the surface paint is sprayed to the surface of the bottom layer by a spray gun, and a finished product is obtained after high-temperature plasticizing. With adoption of the preparation method, the produced composite filter material has good thermal stability, corrosion resistance and higher mechanical strength, fiber dispersion and density of the finished product are improved, the manufacture process is simple and lower in cost, and large-scale industrial production is facilitated.
Description
Technical field
The present invention relates to a kind of surface coating process of glass fibre needle punched filter material, particularly relate to a kind of modified polyphenyl thioether/politef layered coated method of glass fibre filtrate.
Background technology
At present, fire resistant filter material has been widely used in industrial circles such as generating, cement, and filtrate is the chief component of gas-solid separating device, and its performance directly determines the quality of filter effect.Glass fibre acupuncture filter material is a kind of high temperature resistant filter material rational in infrastructure, of good performance.Not only there is the features such as glass fabric is high temperature resistant, corrosion-resistant, dimensionally stable, expansion and contraction are little, and filamentary structure, have three-dimensional micropore, porosity is high, little to gas filtration resistance, is a kind of high temperature filter material of more efficient.
In order to improve filtering accuracy, people are except constantly improving the preparation technology of filtrate own aborning, also use the hindlimb unload such as dipping, coating and overlay film, be intended to top layer and the internal structure of improving filter material, thus obtain the high efficiency filter material of even structure, dimensionally stable.Find in actual production, the oxidative resistance of single polyphenylene sulfide Nomex is bad, cannot adapt to the clean-up effect under high oxygen condition.Although single polytetrafluoroethylene fibre Nomex has WATER REPELLENCY, oxidation resistent susceptibility, it is expensive, requires also very high to post processing equipment, increases production cost.In addition, prepare coating with polytetrafluorethylepowder powder to be coated on filtrate base cloth and can to improve filtrate antistick characteristic, but due to polytetrafluoroethylene (PTFE) because melting viscosity greatly cannot melting levelling, the therefore bad mechanical property of this filtrate completely, easy needle outlet, the binding ability of coating is low.
In sum, at present in the urgent need to a kind of surface coating process of glass fibre needle punched filter material, the high-temperature stability of composite filtering material, acid-fast alkali-proof can be improved, and promote that coating be combined with each other, strengthen surface roughness, thus improve the strainability of finished product, increase finished product service life.
Summary of the invention
Hyperbranched polyphenylene sulfide has the chemical composition similar with linear polyphenylthioether, all contains phenyl ring and sulphur atom, but chemical constitution is different.By blended according to a certain ratio for the polyphenylene sulfide of hyperbranched polyphenylene sulfide and line style, can while reducing melt viscosity, improving end properties, both maintenances are compatibility preferably.Process provides a kind of modified polyphenyl thioether/politef layered coated method of glass fibre filtrate.Using profound fiberglass needled mat as filtrate base cloth, respectively modified polyphenyl thioether and polytetrafluoroethylene (PTFE) are prepared into coating, adopt the method for layered coated, primer coating and the strong modified polyphenyl thioether of base cloth binding ability, top layer coating has the polytetrafluoroethylene (PTFE) of antistick characteristic, thus improves filtrate mechanical strength, high-temperature stability, acid-fast alkali-proof, provides the degree of roughness of filtering layer surface composite coating simultaneously, promote coating and between be combined with each other, and improve dispersiveness and the compactness extent of fiber.
For achieving the above object, technical scheme provided by the present invention is:
Modified polyphenyl thioether/politef layered coated method of glass fibre filtrate, comprising:
1) choose glass fibre needle-punching substrate, through combing, lapping, needling process, make filter material base cloth;
2) linear polyphenylene sulfide and over-expense chain polyphenylene sulfide are mixed and made into modified polyphenyl thioether emulsion;
3) modified polyphenyl thioether emulsion, ptfe emulsion and fluorine containing silane coupling agent are mixed and made into subbing;
4) by ptfe emulsion, fluorine containing silane coupling agent and F
46emulsion is mixed and made into investment precoat;
5) described filter material base cloth is immersed in described subbing, hot setting, with stove cooling, make bottom;
6) with spray gun, investment precoat is sprayed on bottom surface, after high temperature plasticizing, obtains finished product.
Further, step 2) described in modified polyphenyl thioether emulsion be linear polyphenylene sulfide powder, the 2-4% hyperbranched polyphenylene sulfide powder of 6-12% by mass percent, surplus is water composition; Step 3) described in subbing by percentage be the modified polyphenyl thioether emulsion of 35-55%, the fluorine containing silane coupling agent of the ptfe emulsion of 40-60% and 5%-10% forms; Step 4) described in investment precoat be the ptfe emulsion of 45-55%, the F of 20-35% by percentage
46emulsion, surplus is water composition.
Further, step 2) described in modified polyphenyl thioether emulsion by mass percent be 8% linear polyphenylene sulfide powder, 3% hyperbranched polyphenylene sulfide powder, surplus is water composition; Step 3) described in subbing by percentage be the modified polyphenyl thioether emulsion of 40%, the ptfe emulsion of 55% and 5% fluorine containing silane coupling agent form; Step 4) described in investment precoat be the ptfe emulsion of 50%, the F of 30% by percentage
46emulsion, surplus is water composition.
Further, described hyperbranched polyphenylene sulfide joins in the 1-METHYLPYRROLIDONE of 0.8M by two chloro thiophenols of 50mmol and the Anhydrous potassium carbonate of 100mmol, be heated to 150 DEG C, be incubated 8.5 hours, after product hydrochloric acid washing and filtering, add oxolane and dissolve, hexane extraction, filtering drying is made, and the degree of polymerization is 8-12.
Further, the thickness of wherein said subbing is 8-10 μm, and surface layer coating layer thickness is 4-6 μm, surface layer spraying 1-2 layer.
Adopt technique scheme, beneficial effect of the present invention has:
1. base cloth in the present invention use hyperbranched polyphenylene sulfide and linear polyphenylene sulfide blended as primer coating, its crystallization temperature and crystallization rate are higher than polyphenylene sulfide coating linear merely, therefore, it is possible to improve heat endurance and the flow leveling of filtrate, be easier to processing.
2. adopt fiberglass needled mat as filter material base cloth, because its surface fiber is three dimensions resource distribution, porosity is large, reach more than 80%, there is the features such as good permeability, filter efficiency is high, filtration velocity reaches, effective collection limit dust, can ensure to be separated in high-temperature gas-solid the effect playing filtration.
3. adopt the method for layered coated, the modified polyphenyl thioether that bottom coating binding ability is strong, surface layer coating has the polytetrafluoroethylene (PTFE) of antistick characteristic, provides the mechanical strength of coating, prevents the generation of polyphenylene sulfide decomposing phenomenon simultaneously, can obtain coarse coating surface simultaneously.
4. the filtrate manufactured by preparation method of the present invention has good heat endurance, corrosion resistance, can improve dispersiveness and the compactness extent of finished fiber simultaneously, and manufacturing technique is simple, and cost is lower, is applicable to large-scale industrial production.
Detailed description of the invention
Embodiment 1
Preparation fiberglass fibers acupuncture felt: choose glass fibre needle-punching substrate, through combing, lapping, needling process, make filter material base cloth.
Prepare hyperbranched polyphenylene sulfide: in 250mL three-necked bottle, add 10g3, the 1-METHYLPYRROLIDONE of 4-bis-chloro thiophenol and 13.4g Anhydrous potassium carbonate and 80mL, be heated to 150 DEG C, insulation 8.5h.Product is with after hydrochloric acid washing and filtering, and add oxolane and dissolve, with hexane extraction, filtering drying, obtain light brown hyperbranched PPS powder, its degree of polymerization is 8-12.
Prepare modified polyphenyl thioether fibre emulsion: be the linear polyphenylene sulfide powder of 6%, 4% hyperbranched polyphenylene sulfide powder by mass percentage, surplus is the ratio mixing of water, then is mixed by supersonic wave cleaning machine, is mixed with emulsion.
Prepare subbing: be by mass percentage the modified polyphenyl thioether emulsion of 35%, the ptfe emulsion of 60% and 5% the ratio mixing of fluorine containing silane coupling agent, then to be mixed by supersonic wave cleaning machine, be mixed with emulsion.
Prepare investment precoat: be the ptfe emulsion of 45%, the F of 35% by mass percentage
46emulsion, surplus is the ratio mixing of water, then is mixed by supersonic wave cleaning machine, is mixed with emulsion.
Infusion process coating subbing: the filtrate base cloth after cleaning is immersed in subbing emulsion, then by padding machine roll compacting, preliminary drying, temperature is 90 DEG C, bakes, and temperature is 160 DEG C, and with stove cooling, subbing thickness is 8-10 μm.
Spraying process coated side coating: with spray gun by investment precoat emulsion even application in bottom surface, every layer thickness is 4-6 μm, is as the criterion not occur that gas is choked and gathered, spraying 1-2 layer, put into the baking oven preheating 30min of 60 DEG C, then in 360 DEG C of high temperature plasticizing forming.
Embodiment 2
Preparation fiberglass fibers acupuncture felt: choose glass fibre needle-punching substrate, through combing, lapping, needling process, make filter material base cloth.
Prepare hyperbranched polyphenylene sulfide: in 250mL three-necked bottle, add 10g3, the 1-METHYLPYRROLIDONE of 4-bis-chloro thiophenol and 13.4g Anhydrous potassium carbonate and 80mL, be heated to 150 DEG C, insulation 8.5h.Product is with after hydrochloric acid washing and filtering, and add oxolane and dissolve, with hexane extraction, filtering drying, obtain light brown hyperbranched PPS powder, its degree of polymerization is 8-12.
Prepare modified polyphenyl thioether fibre emulsion: be the linear polyphenylene sulfide powder of 12%, 3% hyperbranched polyphenylene sulfide powder by mass percentage, surplus is the ratio mixing of water, then is mixed by supersonic wave cleaning machine, is mixed with emulsion.
Prepare subbing: be by mass percentage the modified polyphenyl thioether emulsion of 35%, the ptfe emulsion of 55% and 10% the ratio mixing of fluorine containing silane coupling agent, then to be mixed by supersonic wave cleaning machine, be mixed with emulsion.
Prepare investment precoat: be the ptfe emulsion of 55%, the F of 20% by mass percentage
46emulsion, surplus is the ratio mixing of water, then is mixed by supersonic wave cleaning machine, is mixed with emulsion.
Infusion process coating subbing: the filtrate base cloth after cleaning is immersed in subbing emulsion, then by padding machine roll compacting, preliminary drying, temperature is 90 DEG C, bakes, and temperature is 160 DEG C, and with stove cooling, subbing thickness is 8-10 μm.
Spraying process coated side coating: with spray gun by investment precoat emulsion even application in bottom surface, every layer thickness is 4-6 μm, is as the criterion not occur that gas is choked and gathered, spraying 1-2 layer, put into the baking oven preheating 25min of 65 DEG C, then in 360 DEG C of high temperature plasticizing forming.
Embodiment 3
Preparation fiberglass fibers acupuncture felt: choose glass fibre needle-punching substrate, through combing, lapping, needling process, make filter material base cloth.
Prepare hyperbranched polyphenylene sulfide: in 250mL three-necked bottle, add 10g3, the 1-METHYLPYRROLIDONE of 4-bis-chloro thiophenol and 13.4g Anhydrous potassium carbonate and 80mL, be heated to 150 DEG C, insulation 8.5h.Product is with after hydrochloric acid washing and filtering, and add oxolane and dissolve, with hexane extraction, filtering drying, obtain light brown hyperbranched PPS powder, its degree of polymerization is 8-12.
Prepare modified polyphenyl thioether fibre emulsion: be the linear polyphenylene sulfide powder of 8%, 3% hyperbranched polyphenylene sulfide powder by mass percentage, surplus is the ratio mixing of water, then is mixed by supersonic wave cleaning machine, is mixed with emulsion.
Prepare subbing: be by mass percentage the modified polyphenyl thioether emulsion of 40%, the ptfe emulsion of 55% and 5% the ratio mixing of fluorine containing silane coupling agent, then to be mixed by supersonic wave cleaning machine, be mixed with emulsion.
Prepare investment precoat: be 50 ptfe emulsions of %, the F of 30% by mass percentage
46emulsion, surplus is the ratio mixing of water, then is mixed by supersonic wave cleaning machine, is mixed with emulsion.
Infusion process coating subbing: the filtrate base cloth after cleaning is immersed in subbing emulsion, then by padding machine roll compacting, preliminary drying, temperature is 90 DEG C, bakes, and temperature is 160 DEG C, and with stove cooling, subbing thickness is 8-10 μm.
Spraying process coated side coating: with spray gun by investment precoat emulsion even application in bottom surface, every layer thickness is 4-6 μm, is as the criterion not occur that gas is choked and gathered, spraying 1-2 layer, put into the baking oven preheating 30min of 60 DEG C, then in 360 DEG C of high temperature plasticizing forming.
In embodiment 1,2,3, end properties parameter sees the following form:
The above embodiment only have expressed embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (5)
1. modified polyphenyl thioether/politef layered coated method of glass fibre filtrate, is characterized in that, comprising:
1) choose glass fibre needle-punching substrate, through combing, lapping, needling process, make filter material base cloth;
2) linear polyphenylene sulfide and over-expense chain polyphenylene sulfide are mixed and made into modified polyphenyl thioether emulsion;
3) modified polyphenyl thioether emulsion, ptfe emulsion and fluorine containing silane coupling agent are mixed and made into subbing;
4) by ptfe emulsion, fluorine containing silane coupling agent and F
46emulsion is mixed and made into investment precoat;
5) described filter material base cloth is immersed in described subbing, hot setting, with stove cooling, make bottom;
6) with spray gun, investment precoat is sprayed on bottom surface, after high temperature plasticizing, obtains finished product.
2. modified polyphenyl thioether/politef layered coated the method for glass fibre filtrate according to claim 1, it is characterized in that, step 2) described in modified polyphenyl thioether emulsion be linear polyphenylene sulfide powder, the 2-4% hyperbranched polyphenylene sulfide powder of 6-12% by mass percent, surplus is water composition; Step 3) described in subbing by percentage be the modified polyphenyl thioether emulsion of 35-55%, the fluorine containing silane coupling agent of the ptfe emulsion of 40-60% and 5%-10% forms; Step 4) described in investment precoat be the ptfe emulsion of 45-55%, the F of 20-35% by percentage
46emulsion, surplus is water composition.
3. modified polyphenyl thioether/politef layered coated the method for glass fibre filtrate according to claim 2, it is characterized in that, step 2) described in modified polyphenyl thioether emulsion by mass percent be 8% linear polyphenylene sulfide powder, 3% hyperbranched polyphenylene sulfide powder, surplus be water composition; Step 3) described in subbing by percentage be the modified polyphenyl thioether emulsion of 40%, the ptfe emulsion of 55% and 5% fluorine containing silane coupling agent form; Step 4) described in investment precoat be the ptfe emulsion of 50%, the F of 30% by percentage
46emulsion, surplus is water composition.
4. modified polyphenyl thioether/politef layered coated the method for the glass fibre filtrate according to any one of claim 1-3, it is characterized in that, described hyperbranched polyphenylene sulfide joins in the 1-METHYLPYRROLIDONE of 0.8M by two chloro thiophenols of 50mmol and the Anhydrous potassium carbonate of 100mmol, be heated to 150 DEG C, be incubated 8.5 hours, after product hydrochloric acid washing and filtering, add oxolane to dissolve, hexane extraction, filtering drying is made, and the degree of polymerization is 8-12.
5. modified polyphenyl thioether/politef layered coated the method for the glass fibre filtrate according to any one of claim 1-3, is characterized in that, the thickness of wherein said subbing is 8-10 μm, and surface layer coating layer thickness is 4-6 μm, surface layer spraying 1-2 layer.
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| CN201410481719.1A CN104233817B (en) | 2014-09-19 | 2014-09-19 | Modified PPS (polyphenylene sulfide) and PTFE (polytetrafluoroethylene) layered coating method for glass fiber filter material |
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| CN201410481719.1A CN104233817B (en) | 2014-09-19 | 2014-09-19 | Modified PPS (polyphenylene sulfide) and PTFE (polytetrafluoroethylene) layered coating method for glass fiber filter material |
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Cited By (4)
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| CN104689643A (en) * | 2015-04-02 | 2015-06-10 | 抚顺天成环保科技有限公司 | KFCM fine-grain gradient filtration needled felt and manufacturing method thereof |
| CN105624885A (en) * | 2015-12-25 | 2016-06-01 | 浙江科力新材料科技有限公司 | High-temperature-resistance garment steamer cord fabric prepared from polyphenylene sulfide, polytetrafluoroethylene and glass fibers and preparation method of cord fabric |
| CN114108330A (en) * | 2021-11-01 | 2022-03-01 | 黄山美澳复合材料有限公司 | Composite Teflon high-temperature adhesive tape and production process thereof |
| CN114405157A (en) * | 2021-12-27 | 2022-04-29 | 重庆再升科技股份有限公司 | High-strength fluid separation medium |
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|---|---|---|---|---|
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| CN114405157A (en) * | 2021-12-27 | 2022-04-29 | 重庆再升科技股份有限公司 | High-strength fluid separation medium |
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