CN101091883B - Equipment for manufacturing composite membrane filter of polytetrafluoroethylene - Google Patents
Equipment for manufacturing composite membrane filter of polytetrafluoroethylene Download PDFInfo
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- CN101091883B CN101091883B CN200710067992XA CN200710067992A CN101091883B CN 101091883 B CN101091883 B CN 101091883B CN 200710067992X A CN200710067992X A CN 200710067992XA CN 200710067992 A CN200710067992 A CN 200710067992A CN 101091883 B CN101091883 B CN 101091883B
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Abstract
The invention publishes a preparation plant for producing polytetrafluoroethylene composite filter membrane, which includes feeding windin gearing, stitching device and control device. The feeding winding gearing includes roller of polytetrafluoroethylene, roller of backing material, roller of composite membrane. The characteristic is that the stitching device includes the roller of rotate speed control device and the roller of cooling. The pressure gearing is fixed on either of the roller of rotate speed control device and the roller of cooling. The heater is fixed on the roller of heating. The cooling device is fixed on the roller of cooling. Both of them have measure temperature component. The composite filter membrane can improve the contractibility and mould greatly and can also hold the shape and structure of polytetrafluoroethylene composite filter membrane.
Description
Technical field
The present invention relates to a kind of filter membrane manufacturing equipment, especially relate to a kind of manufacturing equipment of polytetrafluoroethylene (PTFE) supported composite filtering film.
Background technology
The polytetrafluoroethylene (PTFE) material is in macromolecular material, and performance is outstanding; High temperature resistant, acid and alkali-resistance, organic solvent have nontoxic and biocompatibility again.When the polytetrafluoroethylene (PTFE) miillpore filter of drawing and forming is used for gas or liquid filtering, have than other macromolecular material (as regenerated cellulose, nylon, Kynoar, polyether sulfone) percent opening that miillpore filter is bigger, better combination properties such as particulate obstruction and durability are the filtering materials that there is extensive use in fields such as current chemical industry, medical treatment, food, electronics.But before filter membrane is with the filter core form practical application that folds, need filter membrane is folded with the saturating amount of increase membrane area raising, and single polytetrafluoroethylene (PTFE) miillpore filter film is thin, matter is soft, yielding, can not self-supporting.The filter membrane work in-process needs the support ability moulding of one or more layers other porous material like this, but it is directly folding with backing material the polytetrafluoroethylene (PTFE) miillpore filter, folding forming difficulty not only, the percent defective height, and film and backing material break away from easily in application, influence result of use and life cycle.Therefore people consider polytetrafluoroethylene (PTFE) miillpore filter and backing material are combined with each other, but existing disclosed equipment complex mainly adopts the continuous composite spinning face of the gluing of extensive use auxiliary material equipment, plastics ultrasonic welding system in the textile industry, the hot pressing equipment for coating film that printing industry is used.But above equipment and method all have bigger defective for the polytetrafluoroethylene (PTFE) miillpore filter with high-melting-point, non-adhesion properties, general adhesive can be blocking microporous, reduce the permeability of the effective filtration area and the goods of film greatly, but and use special adhesive or heat-fusible materials very complicated on synthetic and processing technology.Backing material and microporous teflon membran surface often take place laminated firm inadequately, reduce service life greatly, or backing material are melted and cause waste product etc., composite effect to be difficult to reach the high-end applications demand.
Summary of the invention
Technical problem to be solved by this invention is the manufacturing equipment that a kind of polytetrafluoroethylene (PTFE) supported composite filtering film is provided at above-mentioned prior art present situation, manufacturing equipment by special use can be laminated to backing material on the surface of poly tetrafluoroethylene effectively, not only laminated firm, improve the yield rate of product and the service life of product, and do not influenced the gas permeability of polytetrafluoroethylene (PTFE) miillpore filter; The present invention has overcome single polytetrafluoroethylene (PTFE) miillpore filter can not self-supporting, yielding, be unfavorable for the folding defective that is processed into pleat shaped filter element commonly used, and the aperture that has kept original film morphosis and film, the gas permeability influence is very few, and has improved the shrinkage and the mouldability of filter membrane material greatly.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of manufacturing equipment of polytetrafluoroethylene (PTFE) supported composite filtering film, comprise feeding rolling transmission device, press fit device and control device, described control device outputs a control signal to described feeding rolling transmission device and described press fit device, described feeding rolling transmission device comprises polytetrafluoroethylene (PTFE) miillpore filter feeding roller bearing, backing material feeding roller bearing, composite membrane rolling roller bearing, roller is rolled in polytetrafluoroethylene (PTFE) miillpore filter feeding transmission, roller is rolled in backing material feeding transmission and roller is rolled in composite membrane rolling transmission, described press fit device is compoundly rolled roller and constitutes with the compound relative cooling combined roller that rolls of roller that rolls of described heating by at least one heating, described heating is compound rolls roller and the described cooling combined roller that rolls is provided with revolution speed control device, described heating is compound rolls roller and describedly cooling combinedly rolls that the axle of at least one is provided with the pressing Pressure Actuated Device in the roller, the compound inside of rolling roller of described heating is provided with heater, the described cooling combined roller that rolls is provided with cooling device, described heating is compound rolls roller and the described cooling combined roller that rolls is provided with and measures the temperature element that rolls roll surface temperature, and described temperature element is transported to described control device with measuring-signal.
Described heater can be to be arranged at the compound inner and equally distributed many Halogen lamp LEDs of roller that roll of heating, also can be to be the electrothermal tube or the heating element heater of medium with the Oil, Water, Gas, or the heater that adopts modes such as combustion gas, infrared, microwave, high frequency, radiation and steam to heat.Heater can be arranged on the compound roller outside of rolling, and also can be arranged on the compound inner or inside and outside setting simultaneously of roller of rolling.
Described cooling device can be to carry out air blast cooling in a described cooling combined side of rolling roller along the described cooling combined a plurality of fans that axially are set up in parallel that roll roller, also can adopt the mode of water-cooled or oil cooling.Under given conditions, as when environment temperature of living in lower, suitable combination process parameter makes the cooling combined roll surface temperature that rolls need not force to cool off in the time of also can being stabilized in the temperature range that described method requires, and can not use cooling device.
Described temperature element can be the thermocouple of direct contact measurement, also can be the thermal resistance of direct contact measurement, can also be contactless infrared measurement of temperature element.
The compound surface of rolling roller of described heating preferably coats mirror face stainless steel, and the described cooling combined roller that rolls can be to coat rubber outer outside the stainless steel internal layer.
Described feeding rolling transmission device can also be provided with tension force and correction control device, as being made up of magnetic tension control mechanism, torque motor and automatic tension controller.
Compared with prior art, the invention has the advantages that by being arranged on the compound heater that rolls in the roller of heating makes the compound surface temperature of rolling roller of the heating of pressing close to the polytetrafluoroethylene (PTFE) miillpore filter be higher than the melting temperature of backing material, and make the cooling combined surface temperature of rolling roller of pressing close to be lower than the heat distortion temperature of backing material with backing material by being arranged on the cooling combined cooling device that rolls the roller below, like this can with the surface portion fusing of the bonding backing material of polytetrafluoroethylene (PTFE) miillpore filter, can either guarantee that polytetrafluoroethylene (PTFE) miillpore filter and backing material are bonding effectively and compound for one, be unlikely again and backing material all melted or make the backing material thermal deformation; Using the polytetrafluoroethylene (PTFE) supported composite filtering film of manufacturing of the present invention to overcome single polytetrafluoroethylene (PTFE) miillpore filter can not self-supporting, yielding, be unfavorable for the folding defective that is processed into pleat shaped filter element commonly used, and improved the shrinkage and the mouldability of filter membrane material greatly; But composite membrane has the physicochemical characteristic of good anti-solvent high-temperature sterilization equally, and microporous teflon membran compound industrial production requirement continuously in enormous quantities can be regulated, can be satisfied to the compact conformation of equipment complex, complex parameter; The many uniform Halogen lamp LEDs of heating are evenly distributed on and roll roller inside, can guarantee rational heating rate and temperature homogeneity.According to production requirement, the drawing and setting that present device both can be combined in the microporous teflon membran production process carries out the online compound of film and backing material afterwards with before the rolling, also can be independently compound to microporous teflon membran.
Adopt equipment of the present invention, optimize complex condition and carry out serialization production, the polytetrafluoroethylene (PTFE) supported composite filtering film stable performance that obtains, do, the peel strength height of wet condition, compare with the polytetrafluoroethylene (PTFE) miillpore filter before compound, original morphosis and aperture that one side has kept film, gas permeability decline is few on the other hand, can remain on more than 85% of original film Air permenbility.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the structural representation of the embodiment of the invention two;
The structural representation that Fig. 3 cooperates with hydraulic transmission for press fit device of the present invention;
Fig. 4 is the structural representation of hydraulic transmission of the present invention;
Fig. 5 is the structural representation of press fit device of the present invention and temperature element and control device;
Fig. 6 is the structural representation of the cooling device of fan formation of the present invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment one: the manufacturing equipment that the polytetrafluoroethylene (PTFE) supported composite filtering film uses, its structure comprises feeding rolling transmission device 1, press fit device 2 and control device 3, control device 3 outputs a control signal to feeding rolling transmission device 1 and press fit device 2, feeding rolling transmission device 1 comprises polytetrafluoroethylene (PTFE) miillpore filter feeding roller bearing 11, backing material feeding roller bearing 12, composite membrane rolling roller bearing 13, roller 14 is rolled in polytetrafluoroethylene (PTFE) miillpore filter feeding transmission, roller 15 is rolled in backing material feeding transmission and roller 16 is rolled in composite membrane rolling transmission, press fit device 2 rolls roller 21 and rolls relative cooling combined of roller 21 and roll roller 22 and be arranged above and below and constitute with heating is compound by heating is compound, heat compound surface of rolling roller 21 and be coated with mirror face stainless steel, the cooling combined roller 22 that rolls is to coat rubber outer outside the stainless steel internal layer, heat and compoundly roll roller 21 and the cooling combined roller 22 that rolls drive to be rotated by the buncher (not shown), their rotating speed is controlled by the control signal that control device 3 outputs to buncher, the cooling combined axle that rolls roller 22 is provided with hydraulic pressure transmission device 23, as shown in the figure, hydraulic pressure transmission device 23 comprises two symmetrically arranged vertical direction motion slide blocks 231, Pressure gauge 232, hydraulic plumbing system 233 and hand supercharging handle 234, heat compound roller 21 inside of rolling and be provided with the heater 24 that constitutes by equally distributed 18 Halogen lamp LEDs, cooling combined below of rolling roller 22 has constituted cooling device 25 along cooling combined 5 fans that axially are set side by side with that roll roller 22, heat and compoundly roll roller 21 and the cooling combined roller 22 that rolls is provided with temperature element thermocouple 26 and measures the temperature of rolling the roller surface, temperature measurement signal is transported to control device 3, and feeding rolling transmission device 1 is provided with by the magnetic tension control mechanism, tension force that torque motor and automatic tension controller are formed and correction control device (not shown).
Embodiment two: the manufacturing equipment that the polytetrafluoroethylene (PTFE) supported composite filtering film uses, basic structure is identical with embodiment one, and to be press fit device 2 roll roller 21 and be arranged above and below and constitute with the compound cooling combined roller 22 that rolls of relative two of roller 21 that rolls of heating by two heating are compound difference.
In the foregoing description, heater 24 has no special requirements, can be to be the electrothermal tube of medium with the Oil, Water, Gas, or adopt modes such as combustion gas heating, infrared heating, heating using microwave, high-frequency heating, radiation heating, Steam Heating, heater 24 can be arranged on compound roller 21 inside of rolling of heating, also can be arranged on heating and compoundly roll roller 21 outsides, or inside and outsidely be provided with simultaneously.
Following examples are for adopting the said equipment, and the conditioning equipment structural parameters carry out the recombination process and the application of microporous teflon membran.
Embodiment three: form by polytetrafluoroethylene (PTFE) miillpore filter and one deck polypropylene mesh being superimposed together make, the parameter of conditioning equipment, carry out compound: 1. will be arranged on the polytetrafluoroethylene (PTFE) miillpore filter on the polytetrafluoroethylene (PTFE) miillpore filter feeding roller bearing and be arranged on polypropylene mesh on the backing material feeding roller bearing and be transported to by the heating that is arranged above and below is compound by driving control system and roll roller and cooling combined rolling in the press fit device that roller constitutes, polytetrafluoroethylene (PTFE) miillpore filter and the compound roller that rolls of heating are pressed close to, polypropylene mesh and the cooling combined roller that rolls are pressed close to; 2. by to make the compound surface temperature of rolling roller of heating be 300 ℃ by evenly being arranged on the heater that constitutes of compound 18 Halogen lamp LEDs that roll in the roller of heating, cooling combinedly roll cooling device that the roller below constitutes along cooling combined 5 fans that axially are set up in parallel that roll roller to make cooling combined surface temperature of rolling roller be 20 ℃ by being arranged on; 3. roll roller and cooling combined roll roller between provide the pressing of 3MPa pressure in the hydraulic pressure transfer mode in that heating is compound by being arranged on the cooling combined hydraulic pressure transmission device that rolls on the roll shaft, polytetrafluoroethylene (PTFE) miillpore filter and polypropylene mesh machinery are pressed together; 4. the recombination line speed of rotating speed controlling diaphragm by the control buncher is 5 meters/minute; 5. by composite membrane rolling roller bearing the supported composite filtering film after compound being wound up into the composite membrane rolling rolls on the roller.
Embodiment four: the parameter of conditioning equipment, carry out compound.Basic technology is identical with embodiment three, difference be step 2. in the heating compound surface temperature of rolling roller be 180 ℃, cooling combined surface temperature of rolling roller is 85 ℃, heating is compound in 3. rolls roller and the cooling combined pressing pressure that rolls between the roller is 20MPa for step, step 4. in recombination line speed be 15 meters/minute.
Embodiment five: the parameter of conditioning equipment, carry out compound.Basic technology is identical with embodiment three, difference be step 2. in the heating compound surface temperature of rolling roller be 230 ℃, cooling combined surface temperature of rolling roller is 40 ℃, heating is compound in 3. rolls roller and the cooling combined pressing pressure that rolls between the roller is 10MPa for step, step 4. in recombination line speed be 30 meters/minute.
Embodiment six: form by polytetrafluoroethylene (PTFE) miillpore filter and one deck polyester non-woven fabric being superimposed together make, the parameter of conditioning equipment, carry out compound: 1. will be arranged on the polytetrafluoroethylene (PTFE) miillpore filter on the polytetrafluoroethylene (PTFE) miillpore filter feeding roller bearing and be arranged on polyester non-woven fabric on the backing material feeding roller bearing and be transported to by the heating that is arranged above and below is compound by driving control system and roll roller and cooling combined rolling in the press fit device that roller constitutes, polytetrafluoroethylene (PTFE) miillpore filter and the compound roller that rolls of heating are pressed close to, polyester non-woven fabric and the cooling combined roller that rolls are pressed close to; 2. by to make the compound surface temperature of rolling roller of heating be 270 ℃ by evenly being arranged on the heater that constitutes of compound 16 Halogen lamp LEDs that roll in the roller of heating, cooling combinedly roll cooling device that the roller below constitutes along cooling combined 4 fans that axially are set up in parallel that roll roller to make cooling combined surface temperature of rolling roller be 15 ℃ by being arranged on; 3. roll roller and cooling combined roll roller between provide the pressing of 5MPa pressure in the hydraulic pressure transfer mode in that heating is compound by being arranged on the cooling combined hydraulic pressure transmission device that rolls on the roll shaft, polytetrafluoroethylene (PTFE) miillpore filter and polyester non-woven fabric machinery are pressed together; 4. the recombination line speed of rotating speed controlling diaphragm by the control buncher is 5 meters/minute; 5. by composite membrane rolling roller bearing the supported composite filtering film after compound being wound up into the composite membrane rolling rolls on the roller.
Embodiment seven: the parameter of conditioning equipment, carry out compound.Basic technology is identical with embodiment six, difference be step 2. in the heating compound surface temperature of rolling roller be 290 ℃, cooling combined surface temperature of rolling roller is 60 ℃, heating is compound in 3. rolls roller and the cooling combined pressing pressure that rolls between the roller is 17MPa for step, step 4. in recombination line speed be 12 meters/minute.
Embodiment eight: the parameter of conditioning equipment, carry out compound.Basic technology is identical with embodiment six, difference be step 2. in the heating compound surface temperature of rolling roller be 300 ℃, cooling combined surface temperature of rolling roller is 40 ℃, heating is compound in 3. rolls roller and the cooling combined pressing pressure that rolls between the roller is 9MPa for step, step 4. in recombination line speed be 28 meters/minute.
Embodiment nine: form by polytetrafluoroethylene (PTFE) miillpore filter and one deck nylon screen being superimposed together make, the parameter of conditioning equipment, carry out compound: 1. will be arranged on the polytetrafluoroethylene (PTFE) miillpore filter on the polytetrafluoroethylene (PTFE) miillpore filter feeding roller bearing and be arranged on nylon screen on the backing material feeding roller bearing and be transported to by the heating that is arranged above and below is compound by driving control system and roll roller and cooling combined rolling in the press fit device that roller constitutes, polytetrafluoroethylene (PTFE) miillpore filter and the compound roller that rolls of heating are pressed close to, nylon screen and the cooling combined roller that rolls are pressed close to; 2. by to make the compound surface temperature of rolling roller of heating be 300 ℃ by evenly being arranged on the heater that constitutes of compound 16 Halogen lamp LEDs that roll in the roller of heating, cooling combinedly roll cooling device that the roller below constitutes along cooling combined 4 fans that axially are set up in parallel that roll roller to make cooling combined surface temperature of rolling roller be 10 ℃ by being arranged on; 3. roll roller and cooling combined roll roller between provide the pressing of 5.0MPa pressure in the hydraulic pressure transfer mode in that heating is compound by being arranged on the cooling combined hydraulic pressure transmission device that rolls on the roll shaft, polytetrafluoroethylene (PTFE) miillpore filter and nylon screen machinery are pressed together; 4. the recombination line speed of rotating speed controlling diaphragm by the control buncher is 30 meters/minute; 5. by composite membrane rolling roller bearing the supported composite filtering film after compound being wound up into the composite membrane rolling rolls on the roller.
Embodiment ten: the parameter of conditioning equipment, carry out compound.Basic technology is identical with embodiment nine, difference be step 2. in the heating compound surface temperature of rolling roller be 250 ℃, cooling combined surface temperature of rolling roller is 30 ℃, heating is compound in 3. rolls roller and the cooling combined pressing pressure that rolls between the roller is 20MPa for step, step 4. in recombination line speed be 1 meter/minute.
Embodiment 11: the parameter of conditioning equipment, carry out compound.Basic technology is identical with embodiment nine, difference be step 2. in the heating compound surface temperature of rolling roller be 225 ℃, cooling combined surface temperature of rolling roller is 40 ℃, heating is compound in 3. rolls roller and the cooling combined pressing pressure that rolls between the roller is 10MPa for step, step 4. in recombination line speed be 10 meters/minute.
Adopt equipment of the present invention, the parameter of conditioning equipment, carry out compound serialization production, polytetrafluoroethylene (PTFE) (PTFE) the supported composite filtering film stable performance that obtains, do, the peel strength height of wet condition, compare the original morphosis and the aperture that have kept film on the one hand with polytetrafluoroethylene (PTFE) (PTFE) miillpore filter before compound, gas permeability decline is few on the other hand, can remain on more than 85% of original film Air permenbility.
Claims (6)
1. the manufacturing equipment of a polytetrafluoroethylene (PTFE) supported composite filtering film, comprise feeding rolling transmission device, press fit device and control device, described control device outputs a control signal to described feeding rolling transmission device and described press fit device, described feeding rolling transmission device comprises polytetrafluoroethylene (PTFE) miillpore filter feeding roller bearing, backing material feeding roller bearing, composite membrane rolling roller bearing, roller is rolled in polytetrafluoroethylene (PTFE) miillpore filter feeding transmission, roller is rolled in backing material feeding transmission and roller is rolled in composite membrane rolling transmission, it is characterized in that described press fit device is compoundly rolled roller and constitutes with the compound relative cooling combined roller that rolls of roller that rolls of described heating by at least one heating, described heating is compound rolls roller and the described cooling combined roller that rolls is provided with revolution speed control device, described heating is compound rolls roller and describedly cooling combinedly rolls that the axle of at least one is provided with the pressing Pressure Actuated Device in the roller, the compound inside of rolling roller of described heating is provided with heater, the described cooling combined roller that rolls is provided with cooling device, described heating is compound rolls roller and the described cooling combined roller that rolls is provided with and measures the temperature element that rolls roll surface temperature, and described temperature element is transported to described control device with measuring-signal.
2. the manufacturing equipment of a kind of polytetrafluoroethylene (PTFE) supported composite filtering film as claimed in claim 1 is characterized in that described heater is for being arranged at the compound inner and equally distributed many Halogen lamp LEDs of roller that roll of heating.
3. the manufacturing equipment of a kind of polytetrafluoroethylene (PTFE) supported composite filtering film as claimed in claim 1 is characterized in that described cooling device is along the described cooling combined a plurality of fans that axially are set up in parallel that roll roller in the described cooling combined side of roller of rolling.
4. the manufacturing equipment of a kind of polytetrafluoroethylene (PTFE) supported composite filtering film as claimed in claim 1 is characterized in that described temperature element is a thermocouple.
5. the manufacturing equipment of a kind of polytetrafluoroethylene (PTFE) supported composite filtering film as claimed in claim 1 is characterized in that the compound surface of rolling roller of described heating is coated with mirror face stainless steel, and the described cooling combined roller that rolls is to coat rubber outer outside the stainless steel internal layer.
6. the manufacturing equipment of a kind of polytetrafluoroethylene (PTFE) supported composite filtering film as claimed in claim 1 is characterized in that described feeding rolling transmission device is provided with tension force and the correction control device of being made up of magnetic tension control mechanism, torque motor and automatic tension controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710067992XA CN101091883B (en) | 2007-04-13 | 2007-04-13 | Equipment for manufacturing composite membrane filter of polytetrafluoroethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710067992XA CN101091883B (en) | 2007-04-13 | 2007-04-13 | Equipment for manufacturing composite membrane filter of polytetrafluoroethylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101091883A CN101091883A (en) | 2007-12-26 |
| CN101091883B true CN101091883B (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710067992XA Expired - Fee Related CN101091883B (en) | 2007-04-13 | 2007-04-13 | Equipment for manufacturing composite membrane filter of polytetrafluoroethylene |
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| CN (1) | CN101091883B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529291B (en) * | 2011-12-28 | 2014-08-13 | 浙江理工大学 | Bonding method for polytetrafluoroethylene cellular material |
| CN103191653A (en) * | 2012-01-10 | 2013-07-10 | 杭州科百特过滤器材有限公司 | Method for forming asymmetric polytetrafluoroethylene porous membrane |
| CN103273718B (en) * | 2013-05-10 | 2015-08-12 | 安徽洁滤环保科技有限公司 | For the production of the hot pressing equipment complex of coated filter material |
| CN104297422B (en) * | 2014-09-05 | 2016-02-17 | 国家电网公司 | Measure banded three metafiltration film bar and the manufacture methods of tenor tearing type in air |
| CN110676415B (en) * | 2019-10-09 | 2022-01-04 | 深圳中兴新材技术股份有限公司 | Preparation method of coating diaphragm with high air permeability consistency and prepared coating diaphragm |
| CN110723580A (en) * | 2019-11-06 | 2020-01-24 | 安徽百盛源包装材料有限公司 | Packaging material production machinery mechanism of rectifying |
| CN112108007B (en) * | 2020-09-24 | 2022-07-26 | 中原工学院 | Polytetrafluoroethylene nanofiber filtering material and processing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044411A (en) * | 1989-01-24 | 1990-08-08 | 上海市合成树脂研究所 | The continuous preparation method of heterogeneous ion-exchange membrane |
| CN1102748A (en) * | 1993-01-25 | 1995-05-17 | 大金工业株式会社 | Polytetrafluoroethylene porous film and method for manufacturing the same |
| CN1220192A (en) * | 1997-11-14 | 1999-06-23 | 通用电气公司 | Method for producing textured thermoplastic film |
-
2007
- 2007-04-13 CN CN200710067992XA patent/CN101091883B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044411A (en) * | 1989-01-24 | 1990-08-08 | 上海市合成树脂研究所 | The continuous preparation method of heterogeneous ion-exchange membrane |
| CN1102748A (en) * | 1993-01-25 | 1995-05-17 | 大金工业株式会社 | Polytetrafluoroethylene porous film and method for manufacturing the same |
| CN1220192A (en) * | 1997-11-14 | 1999-06-23 | 通用电气公司 | Method for producing textured thermoplastic film |
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Granted publication date: 20110209 Termination date: 20140110 |