CN104028109A - Ceramic filtering pipe with biaxial PTFE (Polytetrafluoroethylene) stretched film and preparation method of pipe - Google Patents
Ceramic filtering pipe with biaxial PTFE (Polytetrafluoroethylene) stretched film and preparation method of pipe Download PDFInfo
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- CN104028109A CN104028109A CN201410299279.8A CN201410299279A CN104028109A CN 104028109 A CN104028109 A CN 104028109A CN 201410299279 A CN201410299279 A CN 201410299279A CN 104028109 A CN104028109 A CN 104028109A
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Abstract
The invention relates to a ceramic filtering pipe with a PTFE (Polytetrafluoroethylene) biaxial stretched film and a preparation method of the pipe. The preparation method comprises the following steps: mixing materials; preparing blanks; pushing and pressing; calendering; vertically stretching after de-greasing treatment; carrying out arc-shaped biaxial stretching; transversely stretching, sintering and curing; winding the film; and sizing. A hydrophobic vent pipe prepared by adopting the steps can be used for purification of coal gas and natural gas, dust separation of a coal chemical industry, and the like; a pipe body is hydrophobic and ventilated; the pipe body can be used for filtering sewage; the porosity of a biaxial stretched PTFE basic film is more than 80% and the filtering efficiency is 99%-99.99%. The ceramic filtering pipe is simple in preparation process, affordable, uniform in pore diameter distribution and high in filtering efficiency.
Description
Technical field:
The present invention relates to film field, relate in particular a kind of ceramic filter tube with PTFE biaxial stretching film and preparation method thereof.
Background technology:
A kind of porous material that expanded polytetrafluoroethylsealing microporous barrier forms through techniques such as multi tension (being expanding treatment), calendering, heat treatments, it is a kind of pliable and tough and whippy poromerics, porosity Gao Shike has pervious function, even aperture distribution, there is sterilization, filtering function film, the surfacing of material, softness, but there is the micropore of a large amount of 0.4 μ m～1 μ m in the inside that can see material under ESEM, and its porosity can account for 80%.This material has following characteristics: without harm, lightweight, corrosion-resistant, resistance to environmental change, overcome the cold flow properties (creep) of pure PTFE stuffing materials, this material seal is even, ageing-resistant, good springiness, can along with the time, not harden or embrittlement, serviceability temperature scope is from-240 ℃～260 ℃, and it is outstanding that it has advantages of that many traditional filter membranes do not have, and its applicability is wide, be widely used in clothes, family, medicine, the fields such as agricultural and petrochemical industry filtration.
The general outer coated one deck pellumina of porous ceramics filter membrane of prior art, it can filter superparticle, but some petroleum chemical industry, coal gas is purified or dust separation does not need superparticle to filter out, only particulate need to be filtered out, now just need to a kind ofly atomic screen pipe can be filtered out.
Summary of the invention:
The object of the invention is for the deficiencies in the prior art part, a kind of hydrophobic, air-permeability pipe is provided; Another object of the present invention is to provide the preparation method with the ceramic filter tube of PTFE biaxial stretching film.
For achieving the above object, the present invention takes following technical proposals:
A preparation method with the ceramic filter tube of PTFE biaxial stretching film, comprises the following steps:
(1) batch mixing: polytetrafluoroethyldispersion dispersion resin powder and hydro carbons extrusion aid are fully mixed in proportion, at 50 ℃～70 ℃ standing 24 hours, form material;
(2) base: material is pressed in advance at 40 ℃～55 ℃ to the cylindrical base of Φ 120mm;
(3) pushing: cylindrical base is placed on pushing machine, is forced into the round bar of Φ 18～29mm under 55 ℃～60 ℃ conditions;
(4) calendering: circle bar is placed on calender, is rolled into oil-containing base band under 50 ℃ of conditions, thickness is 130～180um, and width is 20～35cm;
(5) longitudinal stretching after ungrease treatment: by the degreasing at 260 ℃～280 ℃ of oil-containing base band, remove extrusion aid, obtain degreasing base band, degreasing base band is carried out to longitudinal stretching for the first time at 280 ℃～300 ℃, after draw ratio is 2～5 times, obtain longitudinal stretching Ranvier's membrane;
(6) arc biaxial tension: again longitudinal stretching Ranvier's membrane is carried out to 2～5 times of arc biaxial tensiones, obtain extending Ranvier's membrane;
(7) sintering curing after cross directional stretch: will extend Ranvier's membrane on film balance at 120 ℃～200 ℃ cross directional stretch, then 320 ℃～380 ℃ sintering curings 50 seconds, obtain biaxial tension polytetrafluoroethylene (PTFE) basis film;
(8) volume film: by the upper biaxial tension polytetrafluoroethylene (PTFE) of the outer volume of porous ceramic pipe basis film, be rolled onto certain thickness, by cutting, cut off biaxial tension polytetrafluoroethylene (PTFE) basis film, then porous ceramic pipe continues rotation, in the time of rotation, by hairbrush, brush and attached the basic film close of biaxial tension polytetrafluoroethylene (PTFE) is applied ointment or plaster and on porous ceramic pipe, made volume film;
(9) sizing: volume film is placed in baking oven, baking oven is warmed up to 320 ℃～400 ℃ in 1 hour, insulation half an hour, be then slow cooling to room temperature in baking oven, taking-up.
As preferably, the standard specific gravity 2.16～2.165 of described polytetrafluoroethyldispersion dispersion resin powder.
As preferably, the thickness of described porous ceramic pipe is 2～10mm, and length is 1～1.2m.
According to the preparation-obtained hydrophobic, air-permeability pipe of technique scheme.
Beneficial effect of the present invention is:
When the membrane aperture of the PTFE biaxial stretching film of hydrophobic, air-permeability pipe of the present invention is 0.2um, can be used for the purification of coal gas, natural gas, the dust separation of Coal Chemical Industry industry etc., its body can hydrophobicly be ventilated; When the membrane aperture of the PTFE biaxial stretching film of hydrophobic, air-permeability pipe is 0.45um, can filter sewage.Its PTFE biaxial tension membrane porosity is more than 80%, filter efficiency 99%～99.9%.Preparation technology of the present invention is simple, economic and practical, even aperture distribution.Filter efficiency is high.
The specific embodiment:
Embodiment 1, a kind of ceramic filter tube with PTFE biaxial stretching film and preparation method thereof, and its step is as follows:
(1) batch mixing: the polytetrafluoroethyldispersion dispersion resin powder that the label that the polytetrafluoroethyldispersion dispersion resin powder (standard specific gravity 2.16) that the label that Sichuan morning twilight company is produced is 2165Y or hugeization of Quzhou are produced is 188 and the ISOPARK hydro carbons extrusion aid of Exxon Mobil Corporation fully mix in proportion, at 60 ℃ standing 24 hours, form material.
(2) base: the cylindrical base that material is pressed in advance at 50 ℃ to Φ 120mm;
(3) pushing: cylindrical base is placed on pushing machine, is forced into the round bar of Φ 20mm under 55 ℃ of conditions;
(4) calendering: circle bar is placed on calender, is rolled into oil-containing base band under 50 ℃ of conditions, thickness is 130um, and width is 20cm;
(5) longitudinal stretching after ungrease treatment: by the degreasing at 260 ℃ of oil-containing base band, remove extrusion aid, obtain degreasing base band, degreasing base band is carried out to longitudinal stretching for the first time at 280 ℃, after draw ratio is 2 times, obtain longitudinal stretching Ranvier's membrane;
(6) arc biaxial tension: again longitudinal stretching Ranvier's membrane is carried out to 2 times of arc biaxial tensiones, obtain extending Ranvier's membrane;
(7) sintering curing after cross directional stretch: will extend Ranvier's membrane on film balance at 120 ℃ cross directional stretch, then, 320 ℃ of sintering curings 50 seconds, obtain wide 1.6m, thick 20um, the biaxial tension polytetrafluoroethylene (PTFE) basis film that membrane aperture is 0.15um;
(8) volume film: be 5mm by thickness, length is the upper biaxial tension polytetrafluoroethylene (PTFE) of the outer volume of 1.2m porous ceramic pipe basis film, be rolled onto certain thickness, by cutting, cut off biaxial tension polytetrafluoroethylene (PTFE) basis film, then porous ceramic pipe continues rotation, in the time of rotation, by hairbrush, brush and attached the basic film close of biaxial tension polytetrafluoroethylene (PTFE) is applied ointment or plaster and on porous ceramic pipe, made volume film;
(9) sizing: volume film is placed in baking oven, baking oven is warmed up to 350 ℃ in 1 hour, insulation half an hour, be then slow cooling to room temperature in baking oven, taking-up.
The film thickness of the hydrophobic, air-permeability pipe being made by said method is 0.2mm, and membrane aperture is 0.2um, and gas flux is 2.5～6L/cm
2.min. this hydrophobic, air-permeability pipe can be used for the purification of coal gas, natural gas, the dust separation of Coal Chemical Industry industry etc.
Embodiment 2, a kind of ceramic filter tube with PTFE biaxial stretching film and preparation method thereof, and its step is as follows:
(1) batch mixing: the polytetrafluoroethyldispersion dispersion resin powder that the label that the polytetrafluoroethyldispersion dispersion resin powder (standard specific gravity 2.165) that the label that Sichuan morning twilight company is produced is 209M or Eastern Mountain company produce is 204 and the ISOPARK hydro carbons extrusion aid of Exxon Mobil Corporation fully mix in proportion, at 70 ℃ standing 24 hours, form material;
(2) base: the cylindrical base that material is pressed in advance at 55 ℃ to Φ 120mm;
(3) pushing: cylindrical base is placed on pushing machine, is forced into the round bar of Φ 25mm under 60 ℃ of conditions;
(4) calendering: circle bar is placed on calender, is rolled into oil-containing base band under 50 ℃ of conditions, thickness is 180um, and width is 35cm;
(5) longitudinal stretching after ungrease treatment: by the degreasing at 280 ℃ of oil-containing base band, remove extrusion aid, obtain degreasing base band, degreasing base band is carried out to longitudinal stretching for the first time at 300 ℃, after draw ratio is 5 times, obtain longitudinal stretching Ranvier's membrane;
(6) arc biaxial tension: again longitudinal stretching Ranvier's membrane is carried out to 5 times of arc biaxial tensiones, obtain extending Ranvier's membrane;
(7) sintering curing after cross directional stretch: will extend Ranvier's membrane on film balance at 200 ℃ cross directional stretch, then, 380 ℃ of sintering curings 50 seconds, obtain wide 1.6m, thick 1um, membrane aperture is 0.4um biaxial tension polytetrafluoroethylene (PTFE) basis film;
(8) volume film: be 6mm by thickness, length is the upper biaxial tension polytetrafluoroethylene (PTFE) of the outer volume of 1.2m porous ceramic pipe basis film, be rolled onto certain thickness, by cutting, cut off biaxial tension polytetrafluoroethylene (PTFE) basis film, then porous ceramic pipe continues rotation, in the time of rotation, by hairbrush, brush and attached the basic film close of biaxial tension polytetrafluoroethylene (PTFE) is applied ointment or plaster and on porous ceramic pipe, made volume film;
(9) sizing: volume film is placed in baking oven, baking oven is warmed up to 400 ℃ in 1 hour, insulation half an hour, be then slow cooling to room temperature in baking oven, taking-up.
The film thickness of the hydrophobic, air-permeability pipe being made by said method is 0.2mm, and membrane aperture is 0.45um, and gas flux is 20～40L/cm
2.min. this hydrophobic, air-permeability pipe can be used for filtering sewage.
Above-described embodiment is the specific descriptions that the present invention is carried out; just the present invention is further described; can not be interpreted as limiting the scope of the present invention, within those skilled in the art makes some nonessential improvement according to the content of foregoing invention and adjusts and all to fall into protection scope of the present invention.
Claims (4)
1. with a preparation method for the ceramic filter tube of PTFE biaxial stretching film, it is characterized in that: comprise the following steps:
(1) batch mixing: polytetrafluoroethyldispersion dispersion resin powder and hydro carbons extrusion aid are fully mixed in proportion, at 50 ℃～70 ℃ standing 24 hours, form material;
(2) base: material is pressed in advance at 40 ℃～55 ℃ to the cylindrical base of Φ 120mm;
(3) pushing: cylindrical base is placed on pushing machine, is forced into the round bar of Φ 18～29mm under 55 ℃～60 ℃ conditions;
(4) calendering: circle bar is placed on calender, is rolled into oil-containing base band under 50 ℃ of conditions, thickness is 130～180um, and width is 20～35cm;
(5) longitudinal stretching after ungrease treatment: by the degreasing at 260 ℃～280 ℃ of oil-containing base band, remove extrusion aid, obtain degreasing base band, degreasing base band is carried out to longitudinal stretching for the first time at 280 ℃～300 ℃, after draw ratio is 2～5 times, obtain longitudinal stretching Ranvier's membrane;
(6) arc biaxial tension: again longitudinal stretching Ranvier's membrane is carried out to 2～5 times of arc biaxial tensiones, obtain extending Ranvier's membrane;
(7) sintering curing after cross directional stretch: will extend Ranvier's membrane on film balance at 120 ℃～200 ℃ cross directional stretch, then 320 ℃～380 ℃ sintering curings 50 seconds, obtain biaxial tension polytetrafluoroethylene (PTFE) basis film;
(8) volume film: by the upper biaxial tension polytetrafluoroethylene (PTFE) of the outer volume of porous ceramic pipe basis film, be rolled onto certain thickness, by cutting, cut off biaxial tension polytetrafluoroethylene (PTFE) basis film, then porous ceramic pipe continues rotation, in the time of rotation, by hairbrush, brush and attached the basic film close of biaxial tension polytetrafluoroethylene (PTFE) is applied ointment or plaster and on porous ceramic pipe, made volume film;
(9) sizing: volume film is placed in baking oven, baking oven is warmed up to 320 ℃～400 ℃ in 1 hour, insulation half an hour, be then slow cooling to room temperature in baking oven, taking-up.
2. the preparation method of a kind of ceramic filter tube with PTFE biaxial stretching film according to claim 1, is characterized in that: the standard specific gravity 2.16～2.165 of described polytetrafluoroethyldispersion dispersion resin powder.
3. the preparation method of a kind of ceramic filter tube with PTFE biaxial stretching film according to claim 1, is characterized in that: the thickness of described porous ceramic pipe is 2～10mm, and length is 1～1.2m.
4. the preparation-obtained hydrophobic, air-permeability pipe of the preparation method of a kind of ceramic filter tube with PTFE biaxial stretching film claimed in claim 1.
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| CN201410299279.8A CN104028109A (en) | 2014-06-27 | 2014-06-27 | Ceramic filtering pipe with biaxial PTFE (Polytetrafluoroethylene) stretched film and preparation method of pipe |
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| CN201410299279.8A CN104028109A (en) | 2014-06-27 | 2014-06-27 | Ceramic filtering pipe with biaxial PTFE (Polytetrafluoroethylene) stretched film and preparation method of pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209020A (en) * | 2014-09-30 | 2014-12-17 | 常州膜邦新材料科技有限公司 | Preparation method of polytetrafluoroethylene microporous membrane with catalytic degradation function and polytetrafluoroethylene microporous membrane baseband extrusion device |
| CN109574148A (en) * | 2018-12-28 | 2019-04-05 | 广州市世来至福科技有限公司 | Water purification filter device and method |
| CN109647217A (en) * | 2018-12-28 | 2019-04-19 | 广州市世来至福科技有限公司 | Flexible ceramic film and its preparation method and application |
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| US5510176A (en) * | 1991-07-04 | 1996-04-23 | Mitsubishi Kasei Corporation | Polytetrafluoroethylene porous film |
| US20020170434A1 (en) * | 2001-03-16 | 2002-11-21 | Nitto Denko Corporation | Filtering medium for air filter and process for producing the same |
| CN103007788A (en) * | 2012-12-17 | 2013-04-03 | 浙江理工大学 | Preparation method of wrapped polytetrafluoroethylene ultra-micro filter tube membrane |
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| CN103481528A (en) * | 2013-09-04 | 2014-01-01 | 湖州森诺氟材料科技有限公司 | Biaxially-oriented porous expanded polytetrafluoroethylene expanded hollow tubular membrane and preparation method thereof |
| CN103585898A (en) * | 2013-10-22 | 2014-02-19 | 湖州森诺氟材料科技有限公司 | Polytetrafluoroethylene mask filtering membrane used for PM2.5 air filtering and preparation method of polytetrafluoroethylene mask filtering membrane |
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2014
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5510176A (en) * | 1991-07-04 | 1996-04-23 | Mitsubishi Kasei Corporation | Polytetrafluoroethylene porous film |
| US20020170434A1 (en) * | 2001-03-16 | 2002-11-21 | Nitto Denko Corporation | Filtering medium for air filter and process for producing the same |
| CN103007788A (en) * | 2012-12-17 | 2013-04-03 | 浙江理工大学 | Preparation method of wrapped polytetrafluoroethylene ultra-micro filter tube membrane |
| CN103112182A (en) * | 2013-02-17 | 2013-05-22 | 湖州森诺氟材料科技有限公司 | Highly waterproof seamless polytetrafluoroethylene expanded sheet and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209020A (en) * | 2014-09-30 | 2014-12-17 | 常州膜邦新材料科技有限公司 | Preparation method of polytetrafluoroethylene microporous membrane with catalytic degradation function and polytetrafluoroethylene microporous membrane baseband extrusion device |
| CN109574148A (en) * | 2018-12-28 | 2019-04-05 | 广州市世来至福科技有限公司 | Water purification filter device and method |
| CN109647217A (en) * | 2018-12-28 | 2019-04-19 | 广州市世来至福科技有限公司 | Flexible ceramic film and its preparation method and application |
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Application publication date: 20140910 |