CN111603941A - Flat membrane element and preparation method thereof - Google Patents
Flat membrane element and preparation method thereof Download PDFInfo
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- CN111603941A CN111603941A CN202010445623.5A CN202010445623A CN111603941A CN 111603941 A CN111603941 A CN 111603941A CN 202010445623 A CN202010445623 A CN 202010445623A CN 111603941 A CN111603941 A CN 111603941A
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- membrane element
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- 239000012528 membrane Substances 0.000 title claims abstract description 128
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000012943 hotmelt Substances 0.000 claims abstract description 111
- 229920005989 resin Polymers 0.000 claims abstract description 103
- 239000011347 resin Substances 0.000 claims abstract description 103
- 239000002131 composite material Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000003466 welding Methods 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 229920000620 organic polymer Polymers 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 7
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 7
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 7
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 239000004831 Hot glue Substances 0.000 claims description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000001471 micro-filtration Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000009295 crossflow filtration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/081—Manufacturing thereof
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to the field of ultra-micro filter membranes, and discloses a flat membrane element which comprises two layers of flat composite membranes which are mutually overlapped, wherein a plurality of hot-melt resins which are mutually crossed are arranged between the two layers of flat composite membranes. And a small opening for water outlet is reserved around the two stacked flat plate composite membranes, and the rest are in sealing connection. The invention also discloses a preparation method of the flat membrane element, which comprises the following steps: and S1, coating hot melt resin on the surfaces of the two rolls of flat plate composite films. S2, extruding the two rolls of flat composite films coated with the hot melt resin by double rolls to enable the hot melt resin on the flat composite films to be crossed and fused into a whole in a cross shape to obtain an initial flat membrane element; s3, cutting the initial flat membrane element prepared in the step S2 into a required size, welding the periphery of the initial flat membrane element, and leaving a small opening for water to obtain the flat membrane element. The flat membrane element and the preparation method thereof are simple and easy to implement, are convenient for industrial production, and have good application prospect and economic value.
Description
Technical Field
The invention relates to the field of ultra-micro filter membranes, in particular to a flat membrane element and a preparation method thereof.
Background
Membrane separation techniques have been widely used in many fields such as water treatment, and ultra-microfiltration membranes play an important role in the field of membrane water treatment. The ultra-microfiltration membranes can be classified into spiral membranes, hollow membranes and flat membranes according to the form and the module form. The flat membrane is one of important ultra-micro filtration products in the field of water treatment due to good pressure resistance, higher mechanical strength and higher pollution tolerance degree.
The traditional water treatment flat membrane generally has three layers, the outer layer is a flat composite membrane layer, the middle layer is a support plate which is generally made of ABS material, and a lining net or lining cloth is arranged between the membrane layer and the support plate for flow guide. The flat membrane in the form is firm and durable and has good stability, but because of the existence of the supporting plate and the guide net cloth, the membrane element is heavy and inconvenient to install and transport, and simultaneously, compared with a hollow membrane and a roll-type membrane, the production cost is higher, so that the application of the flat membrane is limited. Therefore, more and more attention is paid to the development of flat membrane elements with low cost and convenience.
Patent CN 102512963B discloses a flat membrane element for water treatment, the surface of the membrane element supporting plate is provided with a boss, and the adjacent membrane elements depend on the boss as an interval support, thereby not only reducing membrane pollution, but also reducing the cost of the supporting plate by 30%. Patent CN 104014246B discloses a double-membrane cross-flow filtration flat membrane module, in which a permeate diversion trench is arranged inside a support plate, so as to increase the effective area of the membrane and make the replacement of the membrane simple and convenient. Patent CN 104226119 a discloses a split flat membrane, in which the supporting plate can be reused, and the cost of the flat membrane is reduced. The above patents are all focused on improving the support plate and the water flow channel, and the invention of a brand new flat membrane is especially important in order to further reduce the cost to the level similar to that of a hollow membrane and a roll-type membrane, ensure that the performance of the membrane element is not reduced, simplify the production process and improve the production efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a flat membrane element and a preparation method thereof, the filtering performance of the prepared flat membrane element is similar to that of the traditional flat membrane with a supporting plate, but the cost is about one third, and the manufacturing specification of the membrane element is not limited by the size of the supporting plate and a welding machine, so that the membrane element can be adjusted at any time, the production equipment is greatly simplified, and the production efficiency is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a flat membrane element, which comprises two layers of flat composite membranes which are mutually superposed, wherein a plurality of hot-melt resins which are mutually crossed are arranged between the two layers of flat composite membranes; and a small opening for water outlet is reserved around the two stacked flat plate composite membranes, and the rest of the composite membranes are in sealing connection.
Further, the flat composite membrane comprises an organic polymer membrane layer and a non-woven fabric supporting layer, wherein the organic polymer membrane layer is attached to the non-woven fabric supporting layer, and the hot-melt resin is arranged on the non-woven fabric supporting layer.
Further, the hot-melt resin is an ethylene-vinyl acetate copolymer, an ethylene-vinyl alcohol copolymer, or an acrylonitrile-butadiene-styrene copolymer.
Further, the mutually crossed hot melt resin is in a cross shape.
Furthermore, the hot melt resin is parallelly spaced by 75-150mm and vertically spaced by 25-50mm.
Further, the length of the hot melt resin is 50-100mm, the width of the hot melt resin is 8-12mm, and the thickness of the hot melt resin is 2.5-10 mm.
The invention discloses a preparation method of a flat membrane element, which comprises the following steps:
and S1, passing the two rolls of flat composite films through a rolling shaft at the same speed, coating vertical 1-shaped hot melt resin on the upper surface of one roll, and coating horizontal 1-shaped hot melt resin on the upper surface of the other roll.
And S2, extruding the two rolls of flat composite films coated with the hot-melt resin by double rolls to enable the vertical hot-melt resin and the horizontal hot-melt resin on the flat composite films to be crossed and fused into a whole in a cross shape, and obtaining the initial flat membrane element.
S3, cutting the initial flat membrane element prepared in the step S2 into a required size, welding the periphery of the initial flat membrane element, and leaving a small opening for water to obtain the flat membrane element.
The flat composite membrane in the step S1 includes two layers, one layer is an organic polymer membrane layer, the other layer is a non-woven fabric support layer, and the organic polymer membrane layer is attached to the non-woven fabric support layer; the hot melt resin is coated on the non-woven fabric supporting layer.
The hot melt resin in step S1 is an ethylene-vinyl acetate copolymer, an ethylene-vinyl alcohol copolymer, or an acrylonitrile-butadiene-styrene copolymer, and a hot melt resin material that can be firmly bonded may be used depending on the nonwoven fabric material (PP, PET, etc.) of the flat composite film.
Further, the hot melt resin in the step S1 is spaced apart by 75-150mm in parallel and by 25-50mm in vertical.
Further, in step S1, vertical hot-melt resin in a shape like a "1" is coated by a vertically disposed hot-melt resin extruder, and horizontal hot-melt resin in a shape like a "one" is coated by a horizontally disposed hot-melt resin extruder; the interval of the hot melt resin can be adjusted by the interval of the discharge port of the hot melt resin extruder.
Furthermore, the length of the hot melt resin is 50-100mm, the width of the hot melt resin is 8-12mm, and the thickness of the hot melt resin is 2.5-10 mm.
Further, the temperature for extruding the hot melt resin is 100-200 ℃, and the temperature for the hot melt resin to reach the double-roller extrusion is 50-100 ℃.
Further, the double rollers of the step S2 are round stainless steel rollers, and the extrusion gap between the double rollers is 4-15 mm.
Furthermore, the welding in step S3 is hot melt welding or ultrasonic welding, and the welding may be performed in a corresponding welding manner according to the difference of the hot melt resin, so as to ensure that the membrane element has excellent sealing performance.
Furthermore, the two rolls of flat composite films are consistent in material, and the hot melt adhesive extruded on the two rolls of flat composite films is consistent in material and temperature.
The invention has the advantages that:
1. the flat membrane element prepared by the invention utilizes the self mechanical strength of the flat composite membrane as a support without any support plate or other supports, thereby greatly reducing the cost.
2. The preparation method of the flat membrane element is simple and easy, is convenient for industrial production, and has good application prospect and economic value.
Drawings
FIG. 1 is a flow chart of the preparation process of the present invention.
FIG. 2 is a flat composite film coated with a longitudinally arranged hot-melt resin according to the present invention.
FIG. 3 is a flat composite film coated with a horizontally arranged hot-melt resin according to the present invention.
Figure 4 is a finished flat sheet membrane element of the present invention.
Description of the main component symbols:
1-flat composite film, 2-rolling shaft, 3-vertical 1-shaped hot-melt resin, 4-horizontal one-shaped hot-melt resin, 5-round stainless steel rolling, 6-initial flat film element, 7-flat film element, 8-small opening, 9-longitudinal hot-melt resin extruder and 10-horizontal hot-melt resin extruder.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1:
as shown in fig. 1-4, two rolls of flat composite film 1 made of the same material are taken, the flat composite film 1 is two layers, one layer is an organic polymer film layer, the other layer is a non-woven fabric support layer, and the organic polymer film layer is attached to the non-woven fabric support layer. One roll is placed at the front end of a longitudinal hot-melt resin extruder 9, the other roll is placed at the front end of a transverse hot-melt resin extruder 10, two rolls of flat composite films 1 pass through a rolling shaft 2 at the same speed and then reach the extruder, ethylene-vinyl acetate copolymer is added into the two hot-melt resin extruders, the hot-melt temperature is set to be 100 ℃, the ethylene-vinyl acetate copolymer is heated and melted into liquid by isolating air, then the liquid is coated on a non-woven fabric supporting layer of the flat composite films 1 in a strip shape, the parameters of the hot-melt resin extruders are set, the parallel interval of the hot-melt resin is adjusted to be 75mm, the vertical interval of the hot-melt resin is adjusted to be 25mm, the length of the hot-melt resin is adjusted to be 50mm, the width of the hot-melt resin is adjusted to be 10mm, the thickness of the hot-melt resin is 2.5mm, a vertical hot-melt resin 3 film is coated, a horizontal one-line-shaped hot-melt, the hot melt resin is cooled to 50 ℃ in the air, the extrusion gap of a round stainless steel roller 5 is adjusted to be 4mm, after the extrusion of the round stainless steel roller 5, the two hot melt resins are crossed and fused together in a cross shape, so that the two rolls of the flat composite membrane 1 are made into an initial flat membrane element 6, the initial flat membrane element 6 is cut, the periphery of the initial flat membrane element is welded by a hot melt welding machine, a small opening 8 is reserved for water to be discharged, and a finished product of a flat membrane element 7 can be obtained, as shown in figure 4. The total mass of each square meter of the flat membrane element is only 500g, which is about one third of the mass of the flat membrane supported by the traditional support plate with the same area, the running flux of sewage is equivalent to that of the traditional flat membrane, and the manufacturing cost is about one third of that of the traditional flat membrane.
Example 2:
as shown in fig. 1-4, two rolls of flat composite film 1 made of the same material are taken, the flat composite film 1 is two layers, one layer is an organic polymer film layer, the other layer is a non-woven fabric support layer, and the organic polymer film layer is attached to the non-woven fabric support layer. One roll is placed at the front end of a longitudinally-arranged hot-melt resin extruder 9, the other roll is placed at the front end of a transversely-arranged hot-melt resin extruder 10, two rolls of flat composite films 1 pass through a rolling shaft 2 at the same speed and then reach the extruder, ethylene-vinyl alcohol copolymer is added into the two hot-melt resin extruders, the hot-melt temperature is set to be 180 ℃, the ethylene-vinyl alcohol copolymer is heated and melted into liquid by isolating air, then the liquid is coated on a non-woven fabric supporting layer of the flat composite films 1 in a strip shape, parameters of the hot-melt resin extruders are set, the parallel interval of the hot-melt resin is adjusted to be 150mm, the vertical interval of the hot-melt resin is adjusted to be 50mm, the length of the hot-melt resin is set to be 100mm, the width of the hot-melt resin is set to be 10mm, a vertical 1-shaped hot-melt resin 3 coated film is shown in a figure 2, a horizontal one-shaped hot-, the hot melt resin is cooled to 90 ℃ in the air, the extrusion gap of the round stainless steel roller 5 is adjusted to be 15mm, after the extrusion of the round stainless steel roller 5, the two hot melt resins are crossed and fused together in a cross shape, so that the two rolls of the flat composite membrane 1 are made into an initial flat membrane element 6, the initial flat membrane element 6 is cut, the periphery of the initial flat membrane element is welded by a hot melt welding machine, a small opening 8 is reserved for water to be discharged, and a finished product of the flat membrane element 7 can be obtained, as shown in figure 4. The total mass of each square meter of the flat membrane element is only 300g, which is about one fifth of the mass of a traditional support plate supporting flat membrane with the same area, the running flux of sewage is equivalent to that of the traditional flat membrane, and the manufacturing cost is about one third of that of the traditional flat membrane.
Example 3:
as shown in fig. 1-4, two rolls of flat composite film 1 made of the same material are taken, the flat composite film 1 is two layers, one layer is an organic polymer film layer, the other layer is a non-woven fabric support layer, and the organic polymer film layer is attached to the non-woven fabric support layer. One roll is placed at the front end of a longitudinal hot-melt resin extruder 9, the other roll is placed at the front end of a transverse hot-melt resin extruder 10, two rolls of flat composite films 1 pass through a roller 2 at the same speed and then reach the extruder, acrylonitrile-butadiene-styrene copolymer is added into the two hot-melt resin extruders, the hot-melt temperature is set to be 200 ℃, the acrylonitrile-butadiene-styrene copolymer is heated and melted into liquid by isolating air, then the liquid is coated on a non-woven fabric supporting layer of the flat composite films 1 in a strip shape, the parameters of the hot-melt resin extruders are set, the parallel interval of the hot-melt resin is adjusted to be 100mm, the vertical interval of the hot-melt resin is adjusted to be 40mm, the length of the hot-melt resin is adjusted to be 80mm, the width of the hot-melt resin is adjusted to be 10mm, the thickness of the hot-melt resin is 5mm, the film coated with vertical 1-shaped hot-melt resin 3 is shown in a figure 2, the film, the hot melt resin is cooled to 100 ℃ in the air, the extrusion gap of the round stainless steel roller 5 is adjusted to be 8mm, after the extrusion of the round stainless steel roller 5, the hot melt resin at two positions is crossly fused together in a cross shape, so that the two rolls of the flat composite membrane 1 are made into an initial flat membrane element 6, the initial flat membrane element 6 is cut, then the periphery is welded by an ultrasonic welding machine, a small opening 8 is reserved for water to be discharged, and a finished product of the flat membrane element 7 can be obtained, as shown in figure 4. The total mass of each square meter of the flat membrane element is only 400g, which is about one fourth of the mass of the flat membrane supported by the traditional support plate with the same area, the running flux of sewage is equivalent to that of the traditional flat membrane, and the manufacturing cost is about one third of that of the traditional flat membrane.
In conclusion, the flat membrane element prepared by the invention utilizes the self mechanical strength of the flat composite membrane as the support without any support plate or other supports, thereby greatly reducing the cost, the membranes are welded together through hot melt resin, the mechanical strength of the membrane element is enhanced, simultaneously, the interval between the hot melt resin is used as a water flow channel, and the membrane element does not need any lining cloth or lining net for flow guide, thereby further greatly reducing the cost. And the membrane element manufacturing specification is not limited by the size of the supporting plate and a welding machine, and can be adjusted at any time, so that the production equipment is greatly simplified, and the production efficiency is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention.
Claims (10)
1. A flat membrane element is characterized by comprising two layers of flat composite membranes which are mutually superposed, wherein a plurality of hot melt resins which are mutually crossed are arranged between the two layers of flat composite membranes; and a small opening for water outlet is reserved around the two stacked flat plate composite membranes, and the rest of the composite membranes are in sealing connection.
2. The flat sheet membrane element of claim 1, wherein: the flat composite membrane comprises an organic polymer membrane layer and a non-woven fabric supporting layer, wherein the organic polymer membrane layer is attached to the non-woven fabric supporting layer, and hot-melt resin is arranged on the non-woven fabric supporting layer.
3. The flat sheet membrane element of claim 1, wherein: the hot melt resin is ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer or acrylonitrile-butadiene-styrene copolymer.
4. The flat sheet membrane element of claim 1, wherein: the mutually crossed hot-melt resin is in a cross shape.
5. The flat sheet membrane element of claim 4, wherein: the hot melt resin is parallelly spaced by 75-150mm and vertically spaced by 25-50mm.
6. The flat sheet membrane element of claim 1, wherein: the length of the hot melt resin is 50-100mm, the width of the hot melt resin is 8-12mm, and the thickness of the hot melt resin is 2.5-10 mm.
7. A preparation method of a flat membrane element is characterized by comprising the following steps:
s1, enabling the two rolls of flat composite films to pass through a rolling shaft at the same speed, coating vertical 1-shaped hot-melt resin on the upper surface of one roll, and coating horizontal one-shaped hot-melt resin on the upper surface of the other roll;
s2, extruding the two rolls of flat composite films coated with the hot-melt resin by double rolls to enable the vertical hot-melt resin and the horizontal hot-melt resin on the flat composite films to be crossed and fused into a whole in a cross shape, and obtaining an initial flat membrane element;
s3, cutting the initial flat membrane element prepared in the step S2 into a required size, welding the periphery of the initial flat membrane element, and leaving a small opening for water to obtain the flat membrane element.
8. The method for producing a flat membrane element according to claim 1, characterized in that: the flat composite membrane in the step S1 has two layers, one layer is an organic polymer membrane layer, the other layer is a non-woven fabric support layer, and the organic polymer membrane layer is attached to the non-woven fabric support layer; the hot melt resin is coated on the non-woven fabric supporting layer.
9. The method for producing a flat membrane element according to claim 1, characterized in that: the hot-melt resin in step S1 is an ethylene-vinyl acetate copolymer, an ethylene-vinyl alcohol copolymer, or an acrylonitrile-butadiene-styrene copolymer.
10. The method for producing a flat membrane element according to claim 1, characterized in that: the hot melt resin in the step S1 is parallelly spaced by 75-150mm and vertically spaced by 25-50 mm;
in the step S1, vertical 1-shaped hot-melt resin is coated through a vertically arranged hot-melt resin extruder, and horizontal one-shaped hot-melt resin is coated through a horizontally arranged hot-melt resin extruder; the interval of the hot melt resin can be adjusted by the interval of the discharge port of the hot melt resin extruder;
the length of the hot melt resin is 50-100mm, the width of the hot melt resin is 8-12mm, and the thickness of the hot melt resin is 2.5-10 mm;
the extrusion temperature of the hot-melt resin is 100-200 ℃, and the temperature of the hot-melt resin reaching the double-roller extrusion is 50-100 ℃;
the double rollers of the step S2 are round stainless steel rollers, and the extrusion gap between the double rollers is 4-15 mm;
the welding of the step S3 is hot melt welding or ultrasonic welding;
the two rolls of flat composite films are consistent in material, and the hot melt adhesive extruded on the two rolls of flat composite films is consistent in material and temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010445623.5A CN111603941A (en) | 2020-05-25 | 2020-05-25 | Flat membrane element and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010445623.5A CN111603941A (en) | 2020-05-25 | 2020-05-25 | Flat membrane element and preparation method thereof |
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| CN111603941A true CN111603941A (en) | 2020-09-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003285359A (en) * | 2002-03-28 | 2003-10-07 | Du Pont Toray Co Ltd | Method for manufacturing composite film |
| CN1705551A (en) * | 2002-10-24 | 2005-12-07 | 东洋纺织株式会社 | Heat-resistant film and composite ion-exchange membrane |
| KR20060031909A (en) * | 2004-10-11 | 2006-04-14 | 한수영 | Preparation method of laminated cloth with fabricated mono- or multi-layer film by sandwich processing |
| CN201891110U (en) * | 2010-11-22 | 2011-07-06 | 任再永 | Novel adhering composite type drainage structural member |
| CN103014758A (en) * | 2012-12-14 | 2013-04-03 | 山东东岳高分子材料有限公司 | Ion exchange film operated under ultrahigh current density condition and preparation method of ion exchange film |
| CN104245101A (en) * | 2012-02-24 | 2014-12-24 | 东丽株式会社 | Separation membrane element and separation membrane module |
| CN205364577U (en) * | 2015-12-24 | 2016-07-06 | 北京康城科技有限公司 | Combined material's manufacture equipment |
| CN212492423U (en) * | 2020-05-25 | 2021-02-09 | 厦门世脉科技有限公司 | Flat membrane element |
-
2020
- 2020-05-25 CN CN202010445623.5A patent/CN111603941A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003285359A (en) * | 2002-03-28 | 2003-10-07 | Du Pont Toray Co Ltd | Method for manufacturing composite film |
| CN1705551A (en) * | 2002-10-24 | 2005-12-07 | 东洋纺织株式会社 | Heat-resistant film and composite ion-exchange membrane |
| KR20060031909A (en) * | 2004-10-11 | 2006-04-14 | 한수영 | Preparation method of laminated cloth with fabricated mono- or multi-layer film by sandwich processing |
| CN201891110U (en) * | 2010-11-22 | 2011-07-06 | 任再永 | Novel adhering composite type drainage structural member |
| CN104245101A (en) * | 2012-02-24 | 2014-12-24 | 东丽株式会社 | Separation membrane element and separation membrane module |
| CN103014758A (en) * | 2012-12-14 | 2013-04-03 | 山东东岳高分子材料有限公司 | Ion exchange film operated under ultrahigh current density condition and preparation method of ion exchange film |
| CN205364577U (en) * | 2015-12-24 | 2016-07-06 | 北京康城科技有限公司 | Combined material's manufacture equipment |
| CN212492423U (en) * | 2020-05-25 | 2021-02-09 | 厦门世脉科技有限公司 | Flat membrane element |
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