CN105797589A - Method for preparing composite polytetrafluoroethylene and ultrahigh-modulus polyethylene filtering membrane - Google Patents
Method for preparing composite polytetrafluoroethylene and ultrahigh-modulus polyethylene filtering membrane Download PDFInfo
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- CN105797589A CN105797589A CN201510000107.0A CN201510000107A CN105797589A CN 105797589 A CN105797589 A CN 105797589A CN 201510000107 A CN201510000107 A CN 201510000107A CN 105797589 A CN105797589 A CN 105797589A
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Abstract
The invention discloses a method for preparing a composite polytetrafluoroethylene and ultrahigh-modulus polyethylene filtering membrane. The method comprises the following steps: (1) separately feeding a raw material ingredient A and a raw material ingredient B from two plunger pumps of a plunger pump extruder; (2) introducing the ingredient A and the ingredient B in the step (1) into a microlayer co-extruding device under the action of the plunger pump extruder; (3) feeding a stacked material prepared in the step (2) to a hanger die, and extruding the stacked material into membrane melt; and (4) gradually thinning the membrane melt under the action of a drawing system with the temperature of 70 DEG C to 90 DEG C and the drawing speed of 30 meters per minute, thereby preparing the composite polytetrafluoroethylene and ultrahigh-modulus polyethylene filtering membrane. According to the method, polytetrafluoroethylene and polyethylene are of gap distribution, similarly, the polyethylene serves as a skeleton, the resistance to deformation is enhanced, the stress of the filtering membrane during service can be withstood, and the deformation is resisted, so that the filtering membrane can better meet the social needs on industrial filtering membranes.
Description
Technical field
The invention belongs to nano non-woven fabric technical field of material, be specifically related to a kind of ptfe composite and the preparation method of ultra high modulus polyethylene filter membrane.
Background technology
Microbedding coextrusion technology develops into decades now, but the only expanded application in local at present, more it is in the laboratory research stage.
Microbedding co-extrusion technology refers to and two or more polymer is formed by coextrusion tens layers or even thousands of layers of alternate multiple composite, and monolayer thickness can be as thin as micro/nano level.Microbedding coextrusion technology can make functional stuffing component in-situ fibrillation in polymeric matrix, thus preparing the alternate multiple composite of high-performance and functionalization.
The excellent properties of different polymer can be got up to prepare functional composite material by microbedding coextrusion technology by alternate multiple mixed binding, when the composite number of plies is abundant, monolayer can be as thin as the one-dimensional nano structure suitable with Chain Dimensions, and the microlayer structures of this uniqueness is by composite functional diversities.For filled-in composite, the appearance of nano-scale dimension Rotating fields can make the distribution of filler particles be two dimension by Simplified Three-dimensional, can not adopt complicated threedimensional model analysis in research with in improving interfacial property (such as diffusion and bonding) etc..
Rainbow film is the microbedding co-extrusion technology application examples that current application amount is more.Utilize two kinds of thermoplastic transparent resins (refraction coefficient difference 0.03) that refraction coefficient is different, more than 30 layers are made through MULTILAYER COMPOSITE coextrusion, on thickness direction, the alternating thickness of uniform parallel is the thin film having rainbow effect of 0.015-0.05mm, with viewing angle difference and color is different.The color effect of its riot of color is based on the refraction of optics, interference, principle of reflection, has rainbow phenomena to produce when the zone of reflections is in the wave-length coverage of light, and the color that rainbow film reflects is to be determined by the wavelength of reflection light.So it shows motley gorgeous color.Preparing rainbow film can also adopt the method for the method and multicoating of carving light coral to prepare, but both approaches manufacturing expense is high, and the area of manufacture is little, and speed of production is low, is only suitable for anti-counterfeiting mark, and trade mark etc. uses.And reflection multilayer plastics compound rainbow film manufacturing expense is low, production scale is big, and a unit can produce tens thousand of square metres in one day, is suitable for application on a large scale, uses in decoration material, printing, packaging etc..Especially in confection, flower packaging, effect is fine, and has sizable application prospect.
Before 2005, the technology of preparing of microbedding co-extrusion technology and rainbow film is held by Mearl company of the U.S., Angerer company and Taiwan He company etc. substantially, wherein having 10 multinomial patents to cover the key point of technology of preparing, the EDI company of the nearest U.S., the Yang Weimin of Beijing Chemical Engineering College, the Guo Shaoyun of Sichuan University, blue sky, absolute sincerity company etc. successively release the problem that patent type technology solves puzzlement thin-film barrier, optical, pin hole fault, flaw fracture, stretch-resistance and electric property.Polytetrafluoroethylene film is too soft, not easily shape, and is easily deformed, affects its use as filter membrane after stress.
Summary of the invention
The technical problem to be solved is in that to overcome the technical barrier that in prior art, politef and ultra high modulus polyethylene filter membrane cannot be prepared, join for reasonable group that utilizes microbedding coextrusion technology and stretching technique, develop ptfe composite and the preparation method of ultra high modulus polyethylene filter membrane, meet the social need of industrialization filter membrane.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
A kind of preparation method of ptfe composite and ultra high modulus polyethylene filter membrane, comprise the following steps: material component A and component B is fed by (1) respectively from two plunger displacement pumps of plunger displacement pump extruder, described component A is the mixture of white oil and politef, the weight ratio of white oil and politef is 95:5-50:50, described component B is the mixture of white oil and ultra high modulus polyethylene, and the weight ratio of white oil and ultra high modulus polyethylene is 95:5-50:50；(2) component A and B component in described step (1) are imported under the effect of plunger displacement pump extruder microbedding co-extruder, extrude the lamination material of more than 30 layers through microbedding co-extruder；(3) the lamination material that described step (2) prepares enters clothes hanger die head, and is extruded into the number of plies more than 30 layers, and thickness is the melt films of 50-1000um；(4) described melt films temperature be 70-90 degree, draft speed be 30 ms/min of drafting systems effect under thinning gradually, prepare ptfe composite and ultra high modulus polyethylene filter membrane；Described filter membrane, according to different demands and standard, is thinned to the filter membrane of special pore size distribution under the effect of drafting system, such as various criterions such as ultrafiltration, nanofiltration, reverse osmosiss；(5) politef and ultra high modulus polyethylene filter membrane coiled material are made by the rolled mechanism of filter membrane that step (4) prepares.Degree, draft speed be 30 ms/min of drafting systems effect under thinning gradually, prepare ptfe composite and the ultra high modulus polyethylene filter membrane filter membrane to special pore size distribution, the various criterion such as such as ultrafiltration, nanofiltration, reverse osmosis.
Plunger displacement pump extruder in described step (1) is duplex plunger pump extruder or three-throw ram pump extruder, it is preferable that three-throw ram pump extruder.
Described step (1) Raw component A and component B is nano-powder or nanometer master batch, prepares functional ptfe composite and the ultra high modulus polyethylene filter membrane of corresponding function.
The ratio of described step (1) A/B can adjust, and as required, the thickness between layers of stacking is adjustable, it is possible to be uniform thickness, it is also possible to is not uniform thickness.
For meeting different Production requirements, in described step (1) when processing ptfe composite and ultra high modulus polyethylene filter membrane, according to circumstances adjust corresponding component and proportioning.
As the extension of the present invention, industry person skilled is by changing the mouth die form of clothes hanger die head, it is also possible to preparation hollow fiber type filter membrane.
Compared with prior art, the invention have the benefit that the preparation method of the 1. present invention is simple to operate, mild condition, the cost of raw material is low；2. utilizing politef and ultra high modulus polyethylene filter membrane that method of the present invention prepares, even structure adjustable, mechanical performance is excellent, easy functionalization；3. preparation method operating process of the present invention is easy, utilize existing Weaving device to be directly realized by politef ultra high modulus polyethylene filter membrane to prepare, through the corresponding ripe accessory of reasonably design and coupling, politef and ultra high modulus polyethylene filter membrane can be obtained in a large number, it is simple to next step industrial applications；4. the raw material sources constructing politef and ultra high modulus polyethylene filter membrane utilized are extensive, and cost is low, it is possible to a large amount of productions continuously；5. politef of the present invention and polyethylene are spaced apart, be equivalent to using polyethylene as skeleton, strengthen the ability of resistance to deformation, filter membrane pressure in use and resistance to deformation can be born, it is more beneficial for the use of filter membrane, the present invention utilizes reasonable group of microbedding coextrusion technology and stretching technique to join, and develops ptfe composite and the preparation method of ultra high modulus polyethylene filter membrane, meets the social need of industrialization filter membrane.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Detailed description of the invention
For being best understood from the present invention, below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
As shown in Figure 1, the preparation method of the present embodiment ptfe composite and ultra high modulus polyethylene filter membrane, comprise the following steps: (1) is by material component A: the mixture of white oil and politef and component B: the mixture of white oil and ultra high modulus polyethylene is respectively from two plunger displacement pumps feedings of three-throw ram pump extruder, in component A, white oil is 95:5 with the weight ratio of politef, and in component B, white oil is 95:5 with the weight ratio of ultra high modulus polyethylene；(2) component A and B component in described step (1) are imported under the effect of three-throw ram pump extruder microbedding co-extruder, extrude the lamination material of 50 layers through microbedding co-extruder；(3) the lamination material that step (2) prepares enter clothes hanger die head and be extruded into the number of plies be 50 layers, thickness be the melt films of 50um；(4) described melt films temperature be 70 degree, draft speed be 30 ms/min of drafting systems effect under thinning gradually, prepare ptfe composite and ultra high modulus polyethylene filter membrane, the rolling of rolling for filter membrane mechanism is become ptfe composite and ultra high modulus polyethylene filters film roll.
Embodiment 2
As shown in Figure 1, the preparation method of the present embodiment ptfe composite and ultra high modulus polyethylene filter membrane, comprise the following steps: (1) is by material component A: the mixture of white oil and politef and component B: the mixture of white oil and ultra high modulus polyethylene is respectively from two plunger displacement pumps feedings of three-throw ram pump extruder, in component A, white oil is 85:15 with the weight ratio of politef, and in component B, white oil is 90:10 with the weight ratio of ultra high modulus polyethylene；(2) component A and B component in described step (1) are imported under the effect of three-throw ram pump extruder microbedding co-extruder, extrude the lamination material of 200 layers through microbedding co-extruder；(3) the lamination material that step (2) prepares enter clothes hanger die head and be extruded into the number of plies be 200 layers, thickness be the melt films of 500um；(4) described melt films temperature be 80 degree, draft speed be 30 ms/min of drafting systems effect under be thinned to the ultra filtration filter membrane of special pore size distribution gradually, prepare ptfe composite and ultra high modulus polyethylene filter membrane, the rolling of rolling for filter membrane mechanism is become ptfe composite and ultra high modulus polyethylene filters film roll.
Embodiment 3
As shown in Figure 1, the preparation method of the present embodiment ptfe composite and ultra high modulus polyethylene filter membrane, comprise the following steps: (1) is by material component A: the mixture of white oil and politef and component B: the mixture of white oil and ultra high modulus polyethylene is respectively from two plunger displacement pumps feedings of duplex plunger pump extruder, in component A, white oil is 90:10 with the weight ratio of politef, and in component B, white oil is 80:10 with the weight ratio of ultra high modulus polyethylene；(2) component A and B component in described step (1) are imported under the effect of duplex plunger pump extruder microbedding co-extruder, extrude the lamination material of 300 layers through microbedding co-extruder；(3) the lamination material that step (2) prepares enter clothes hanger die head and be extruded into the number of plies be 300 layers, thickness be the melt films of 1000um；(4) described melt films temperature be 90 degree, draft speed be 30 ms/min of drafting systems effect under be thinned to the ultra filtration filter membrane of special pore size distribution gradually, prepare ptfe composite and ultra high modulus polyethylene filter membrane, the rolling of rolling for filter membrane mechanism is become ptfe composite and ultra high modulus polyethylene filters film roll.
Embodiment 4
As shown in Figure 1, the preparation method of the present embodiment ptfe composite and ultra high modulus polyethylene filter membrane, comprise the following steps: (1) is by material component A: the mixture of white oil and politef and component B: the mixture of white oil and ultra high modulus polyethylene is respectively from two plunger displacement pumps feedings of duplex plunger pump extruder, in component A, white oil is 85:10 with the weight ratio of politef, and in component B, white oil is 90:5 with the weight ratio of ultra high modulus polyethylene；(2) component A and B component in described step (1) are imported under the effect of duplex plunger pump extruder microbedding co-extruder, extrude the lamination material of 256 layers through microbedding co-extruder；(3) the lamination material that step (2) prepares enter clothes hanger die head and be extruded into the number of plies be 256 layers, thickness be the melt films of 1000um；(4) described melt films temperature be 90 degree, draft speed be 30 ms/min of drafting systems effect under be thinned to the ultra filtration filter membrane of special pore size distribution gradually, prepare ptfe composite and ultra high modulus polyethylene filter membrane, the rolling of rolling for filter membrane mechanism is become ptfe composite and ultra high modulus polyethylene filters film roll.
Embodiment 5
As shown in Figure 1, the preparation method of the present embodiment ptfe composite and ultra high modulus polyethylene filter membrane, comprise the following steps: (1) is by material component A: the mixture of white oil and politef and component B: the mixture of white oil and ultra high modulus polyethylene is respectively from two plunger displacement pumps feedings of duplex plunger pump extruder, in component A, white oil is 20:10 with the weight ratio of politef, and in component B, white oil is 20:10 with the weight ratio of ultra high modulus polyethylene；(2) component A and B component in described step (1) are imported under the effect of duplex plunger pump extruder microbedding co-extruder, extrude the lamination material of 220 layers through microbedding co-extruder；(3) the lamination material that step (2) prepares enter clothes hanger die head and be extruded into the number of plies be 220 layers, thickness be the melt films of 550um；(4) described melt films temperature be 85 degree, draft speed be 30 ms/min of drafting systems effect under be thinned to the ultra filtration filter membrane of special pore size distribution gradually, prepare ptfe composite and ultra high modulus polyethylene filter membrane, the rolling of rolling for filter membrane mechanism is become ptfe composite and ultra high modulus polyethylene filters film roll.
Embodiment 6
As shown in Figure 1, the preparation method of the present embodiment ptfe composite and ultra high modulus polyethylene filter membrane, comprise the following steps: (1) is by material component A: the mixture of white oil and politef and component B: the mixture of white oil and ultra high modulus polyethylene is respectively from two plunger displacement pumps feedings of duplex plunger pump extruder, in component A, white oil is 50:50 with the weight ratio of politef, and in component B, white oil is 20:10 with the weight ratio of ultra high modulus polyethylene；(2) component A and B component in described step (1) are imported under the effect of duplex plunger pump extruder microbedding co-extruder, extrude the lamination material of 150 layers through microbedding co-extruder；(3) the lamination material that step (2) prepares enter clothes hanger die head and be extruded into the number of plies be 150 layers, thickness be the melt films of 600um；(4) described melt films temperature be 80 degree, draft speed be 30 ms/min of drafting systems effect under be thinned to the ultra filtration filter membrane of special pore size distribution gradually, prepare ptfe composite and ultra high modulus polyethylene filter membrane, the rolling of rolling for filter membrane mechanism is become ptfe composite and ultra high modulus polyethylene filters film roll.
As preferably, the present embodiment Raw component A and component B is nano-filled master batch.
Claims (3)
1. the preparation method of a ptfe composite and ultra high modulus polyethylene filter membrane, it is characterized in that comprising the following steps: material component A and component B is fed by (1) respectively from two plunger displacement pumps of plunger displacement pump extruder, described component A is the mixture of white oil and politef, the weight ratio of white oil and politef is 95:5-50:50, described component B is the mixture of white oil and ultra high modulus polyethylene, and the weight ratio of white oil and ultra high modulus polyethylene is 95:5-50:50；(2) component A and B component in described step (1) are imported under the effect of plunger displacement pump extruder microbedding co-extruder, extrude the lamination material of more than 30 layers through microbedding co-extruder；(3) the lamination material that described step (2) prepares enters clothes hanger die head, and is extruded into the number of plies more than 30 layers, and thickness is the melt films of 50-1000um；(4) described melt films temperature be 70-90 degree, draft speed be 30 ms/min of drafting systems effect under thinning gradually, prepare ptfe composite and ultra high modulus polyethylene filter membrane.
2. the preparation method of ptfe composite according to claim 1 and ultra high modulus polyethylene filter membrane, it is characterised in that: the plunger displacement pump extruder in described step (1) is duplex plunger pump extruder or three-throw ram pump extruder.
3. the preparation method of ptfe composite according to claim 1 and ultra high modulus polyethylene filter membrane, it is characterised in that: described step (1) Raw component A and component B is nano-filled master batch.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106540551A (en) * | 2016-10-06 | 2017-03-29 | 浙江大学 | High hydrophobicity polyethylene flat plate porous film and preparation method thereof |
| CN108686520A (en) * | 2018-06-12 | 2018-10-23 | 漳州龙文琪睿生物科技有限公司 | A kind of preparation method of hemodialysis membrane raw material |
| CN115404566A (en) * | 2022-09-02 | 2022-11-29 | 江苏文明人造草坪有限公司 | Production process of high-performance mesh |
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| WO2009089133A2 (en) * | 2008-01-08 | 2009-07-16 | 3M Innovative Properties Company | Nanoparticle dispersion, compositions containing the same, and articles made therefrom |
| CN102064301A (en) * | 2010-12-25 | 2011-05-18 | 佛山塑料集团股份有限公司 | Method for manufacturing porous multilayer composite diaphragm for lithium battery and diaphragm |
| CN103831976A (en) * | 2014-02-23 | 2014-06-04 | 青岛中科昊泰新材料科技有限公司 | Method for preparing strong-strength composite plastic film |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009089133A2 (en) * | 2008-01-08 | 2009-07-16 | 3M Innovative Properties Company | Nanoparticle dispersion, compositions containing the same, and articles made therefrom |
| CN102064301A (en) * | 2010-12-25 | 2011-05-18 | 佛山塑料集团股份有限公司 | Method for manufacturing porous multilayer composite diaphragm for lithium battery and diaphragm |
| CN103831976A (en) * | 2014-02-23 | 2014-06-04 | 青岛中科昊泰新材料科技有限公司 | Method for preparing strong-strength composite plastic film |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106540551A (en) * | 2016-10-06 | 2017-03-29 | 浙江大学 | High hydrophobicity polyethylene flat plate porous film and preparation method thereof |
| CN106540551B (en) * | 2016-10-06 | 2019-08-23 | 浙江大学 | High hydrophobicity polyethylene flat plate porous film and preparation method thereof |
| CN108686520A (en) * | 2018-06-12 | 2018-10-23 | 漳州龙文琪睿生物科技有限公司 | A kind of preparation method of hemodialysis membrane raw material |
| CN115404566A (en) * | 2022-09-02 | 2022-11-29 | 江苏文明人造草坪有限公司 | Production process of high-performance mesh |
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