CN105040275B - Wet method base material non-woven fabrics for reverse osmosis membrane and preparation method thereof - Google Patents
Wet method base material non-woven fabrics for reverse osmosis membrane and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of wet method base material non-woven fabrics for reverse osmosis membrane and preparation method thereof, its product substrate non-woven fabrics is with its upper strata as ES composite fibres, lower floor is COPET/PET terylene composite fibres, middle level is PET, the composite fibre of ES and COPET/PET composite fibres, Jing hot melts are rolled and integral, and which is integrally principal character in single layer structure, and its preparation method is with its hydrophilic treated successively including raw fibre, manufacture paper with pulp into net, drying and processing, hot melt is rolled for the first time, cooling meat process, second hot melt is rolled and 7 steps of quality testing and winding, and 7 step continuous synchronizations are carried out as principal character, with favorable quality of finished products, preparation method technique is advanced rationally, the energy-saving and low feature of process costs.
Description
Technical field
The present invention relates to a kind of non-woven fabrics manufactured paper with pulp by wet method, it is a kind of base material for being coated with reverse osmosis membrane, Yi Jisuo
State the preparation method of base material non-woven fabrics.Belong to wet nonwoven fabricss technical field.
Background technology
As industrial and agricultural production is developed rapidly, and urbanization is quickly propelled, and water pollution increasingly sharpens.So as to promote at water
Reason technology is developed rapidly.
In existing water technology, it is much to carry out water process using membrane technology.Reverse osmosis membrane technology is used for example
Carry out desalinization process and direct drinking to process, household drinking water process and semi-conductor industry water for cleaning, food service industry water,
The process such as medical industry water.
And govern generally carries out the key factor of water process using reverse osmosis membrane technology, it is reverse osmosis membrane.
China has introduced developed country's reverse osmosis membrane manufacturing technology in last century the nineties, has been enter into quick sending out at present
The duration of an exhibition, most of masking raw material realize production domesticization.But the base material non-woven fabrics of anti-seepage membrane, temporarily nothing is reached a standard completely for China, and by day
This, US enterprise monopolization, it is expensive, had a strong impact on the international competing of masking enterprise of China and water purifier terminal enterprise product
Strive power.
The reverse osmosis membrane of prior art can be divided into the flat film of rolling and hollow fiber membrane.When reverse osmosis membrane film flat for rolling, this
Plant reverse osmosis membrane and the flat film for being formed mainly is coated with by synthesising macromolecule copolymer.As which has the polymer for being separated by filtration function
The mechanical strength of coating monomer film is extremely low, it is impossible to makes membrane module, and could use after must being combined into one with non-woven fabrics, because
This non-woven fabrics becomes the key foundation material that must possess for reverse osmosis membrane.
Reverse osmosis membrane is typically dissolved in after organic solution by polysulfones, makes infiltration coating solution, and Jing casting machines curtain coating is coated on
Non-woven fabrics one side layer, so as to high intensity reverse osmosis membrane is obtained.And must possess excellent as the non-woven fabrics of reverse osmosis membrane base material
Uniformity of the fiber into net distribution, good microcellular structure, higher tensile strength, the percent thermal shrinkage of very little are suitable ventilative
Amount, surface can not be fluffed, and deflection is little, and consistency of thickness etc. is required.
Base material non-woven fabrics bright finish is coated in polysulfones solution curtain coating（It is referred to herein as A faces, as follows）Afterwards, polysulfones solution must
Must infiltrate at the 1/2 or 2/3 of base material nonwoven thickness, and anchor structure is internally formed in non-woven fabrics after the solidification of polysulfones solution,
So that film layer will not occur layering, peeling with base material non-woven fabrics.But apply polysulfones solution it is impermeable to base material without
Spin reverse of the cloth non-coated layer（It is referred to herein as B faces, as follows）, during in order to avoid affecting reverse osmosis membrane to make drainage element, its base
Material non-woven fabrics B faces and the paste fastness of associated component.
And the film layer of polysulfones is very thin, about 0.03mm, it is desirable to which base material non-woven fabrics A faces surface smoothness is good, without fluffing
Phenomenon.Can not there is film layer uneven thickness because of base material nonwoven surface flatness difference in polysulfones coating, and because of base material non-woven fabrics
Wildness and make film layer produce pin hole and bubble.Due to be coated with polysulfones solution base material non-woven fabrics one side layer coating after
In its hot water cleaning, drying course, when the film layer being likely to form solidifies, coated surface shrinks inconsistent with non-coated surface, and leads
Two sides of the reverse osmosis membrane longitudinal direction after film layer solidification are caused to coated face（A faces）Center crimps or produces fold, therefore it is required that
The pre-existing difference of percent thermal shrinkage of base material non-woven fabrics A faces and B faces fiber in the fabrication process.The longitudinal direction of base material non-woven fabrics and horizontal stroke
To tensile strength be close to（1.3 can not be more than：1）, with prevent from being coated with the permeable membrane after polysulfones solidify when, two sides in longitudinal direction are to A
Roll is bent or produces fold.
In existing technology, patent publication No. CN101765456A（Toray）, it is proposed that with continuous fiber system
Into spinning building and with multilamellar spinning building superposition be bonded to one by heat bonding, make the base material non-woven fabrics of reverse osmosis membrane, or
Spinning building made by the compound continuous fiber be made up of Multiple components, is equipped with melt spraying non-woven fabrics made by meltblown.With this
Non-woven fabrics made by two kinds of distinct methods, are combined into one in the method for multiple-layer stacked, heating pressurization, make reverse osmosis membrane base
Material non-woven fabrics.Although the method can solve base material nonwoven surface fluffing problem and reach longitudinal direction to compare 2.7 with lateral pull：1
Require, but for the curling, fold that produce when overcoming the shortcomings of base material non-woven fabrics coating polysulfones solidify afterwards are dissatisfactory.Separately
There are inhomogeneities in micropore that outer spun-bonded non-woven fabrics and melt spraying non-woven fabrics are formed in fiber micro structure into the net, aperture, porosity.
And the technology equipment needed thereby complexity is various, technical process is difficult manipulation, invests huge.
In order to tackle in coating process, polysulfones solution can penetrate 1/3 to nonwoven layer or 1/2 position, and can not
Infiltrate into the uncoated face of non-woven fabrics（B faces）.Patent publication No. CN102188910A（Mitsubishi）Propose and synthesized with main body
The cross-sectional aspect ratio of fiber is 1.2-3.0, the technology of 1.4-2.5, but it has fiber cross section in nonwoven thickness direction
The modification of length-width ratio, and the technology manufactured paper with pulp using wet type molding the superposition of multilamellar nonwoven layers after by heating, pressurization is compound is obtained
Reverse osmosis membrane base material non-woven fabrics.
Raw fibre shape of cross section used in wet type is manufactured paper with pulp is typically all circular, and profiled filament is easy in water
Winding can not carry out wet method and manufacture paper with pulp；Enable and manufacture paper with pulp into non-woven fabrics, the fiber distribution of non-woven fabrics also will not be uniform.The technology institute
The length-width ratio of the main body synthetic fibers of proposition, is after the non-woven fabrics multiple-layer stacked of molding of manufacturing paper with pulp, after heating milling train pressurization
Caused by fiber cross section deformation.General thermoplastic fibre non-woven fabrics fiber cross section after heating pressurization can all be deformed,
Form pancake or ellipse.Thus the technology is beneficial to the A faces smoothness of base material non-woven fabrics, but can't resolve base material nonwoven
After cloth coating polysulfones solution, when the cleaning of Jing hot water, solidification, permeable membrane one side shrinks produced two sides in longitudinal direction and rolls up to A faces center
A bent, difficult problem for fold, can not avoid the nonwoven surface fluffing problem that chopped fiber wet method is manufactured paper with pulp.And prepared by the technology
Base material non-woven fabrics still need to MULTILAYER COMPOSITE, thus its complex process, and flow process is longer, relatively costly.
In order to tackle non-woven fabrics when polysulfones solution is coated with, as polysulfones solution coating is in the one side of non-woven fabrics（A faces）, apply
Non-woven fabrics after cloth hot water clean, during polysulfones solution film-forming, base material non-woven fabrics A faces longitudinal direction two sides to contract,
Curling or fold is caused painting membrane process is carried out.Patent CN103429327A（Japanese A Bo）.Propose and manufacture paper with pulp in a wet process
Into the different wet nonwoven fabricss of each layer vertical, horizontal tensile strength, technology base material non-woven fabrics A faces width after hot-pressing
Upper center produces raised bending, also just it may be said that base material non-woven fabrics A faces are different with the lateral shrinkage in B faces, i.e., using two sides
Shrinkage factor difference, make base material non-woven fabrics be shrunk to A faces width center and raise up, offset base material non-woven fabrics coating it is molten
After liquid, produced both sides are shunk during film-forming and is rolled to center, permeable membrane A face middle body problem in a concave shape.But should
Technology wet method manufacture paper with pulp multilamellar different stretch intensity non-woven fabrics when, need multiple stage set different flow, different in flow rate, different inclination angle
The inclined wire paper machine of degree.And inclined wire paper machine, equipment investment is huge, and each layer non-woven fabrics vertically and horizontally tensile strength ratio be difficult to it is correct
Control, complex process, high cost, technological process are long.The technology does not have the flatness to base material non-woven fabrics, suppresses in addition
Hair, coating polysulfones solution make consideration to the INF of base material non-woven fabrics, anti-permeability and adhesivity.
Take a broad view of the structure of the base material non-woven fabrics of prior art, be using wet type manufacture paper with pulp molding multilamellar nonwoven stacking
Plus after, by heating the compound obtained multi-layer compound structure of pressurization.Because there is structural not enough and work(in three's patented technology
Energy defect, and the use requirement of the reverse osmosis membrane can not be met.
The content of the invention
The first object of the present invention is to provide the base material non-woven fabrics that a kind of wet method for anti-seepage membrane is manufactured paper with pulp.The base material without
Spin cloth and will reach its coated face（A faces）Flatness is excellent；Coating polysulfones solution accessibility is good, and will not infiltrate into base material nonwoven
The uncoated face of cloth（B faces）；It is good with base material non-woven fabrics binding strength after polysulfones solution film-forming, it is not peeling-off；Base material nonwoven
Cloth A faces are phozy；Base material non-woven fabrics are being coated with when polysulfones solution solidifies the fold that do not bend, to overcome prior art not
Foot.
It is a second object of the invention to provide a kind of preparation method of the reverse osmosis membrane base material non-woven fabrics.The method
In single-layer nonwoven structure, process is easy to operation to manufactured goods to be accomplished, controllability is correct, and one-shot forming, technological process are short,
Low production cost, equipment is simple and small investment, to overcome the shortcomings of prior art.
The technical scheme for realizing an object of the present disclosure is：The base material nonwoven that a kind of wet method for reverse osmosis membrane is manufactured paper with pulp
Cloth, is rolled by hot melt Jing after wet type is manufactured paper with pulp by synthetic fibers and is formed, and its：
A, the base material non-woven fabrics are in integrally single layer structure；
B, base material non-woven fabrics of the entirety in single layer structure, its synthetic fibers by 3 level different material of upper, middle and lower
Composition；
And its upper strata is low melting point hot melt ES composite fibres, and the ES composite fibres are by top layer PE polyethylene and inner core
The circular concentric fiber constituted by PP polypropylene；
And its lower floor is low melting point hot melt COPET/PET terylene composite fibres, and the COPET/PET terylene is compound fine
Dimension, is the circular concentric fiber being made up of with inner core PET polyester the modified COPET polyester in top layer；
And its intermediate layer is that PET polyster fibres are fine with the mixing of ES composite fibres and COPET/PET terylene composite fibres
Dimension；
C, in the base material non-woven fabrics raw material gross weight, ES composite fibres account for 20 ~ 50%, COPET/PET terylene and are combined
Fiber accounts for 20 ~ 50%, and PET accounts for 15 ~ 50%.
In above-mentioned technical proposal, the present invention also advocates,
In the base material non-woven fabrics raw material gross weight, ES composite fibres account for the compound fibre of 30 ~ 40%, COPET/PET terylene
Dimension accounts for 30 ~ 40%, PET polyster fibres and accounts for 20 ~ 35%；The base material bonded fabric product thickness is 0.07 ~ 0.15mm..
The melting temperature of the PE on the ES composite fibres top layer of the base material non-woven fabrics upper strata ES composite fibres is 129 DEG C, and
The melting temperature of its inner core PP is 165 DEG C；The proportion of the ES composite fibres is 0.91, and percentage elongation is 20%, and percent thermal shrinkage is 2
~ 3%, hydroscopicity is 0；
The COPET/PET polyster fibres top layer of the base material non-woven fabrics lower floor COPET/PET terylene composite fibres is modified
The melting temperature of COPET polyester is 110 DEG C, and the melting temperature of inner core PET polyester is 265 DEG C；The COPET/PET terylene is multiple
The proportion of condensating fiber is 1.38%, and percentage elongation is 80 ~ 120%, and percent thermal shrinkage is 8 ~ 12%, and hydroscopicity is 0.4%；
The proportion of the PET polyster fibres in the base material non-woven fabrics middle level is 1.38, and percentage elongation is 50 ~ 60%, and hydroscopicity is
0.4%.
A diameter of 15 ~ 22 μm of the ES composite fibres, length be 2 ~ 6mm, the diameter of COPET/PET terylene composite fibres
For 8 ~ 15 μm, length is 2 ~ 6mm, and PET polyster fibres are superfine fibres directly for 4 ~ 8 μm.
The technical scheme for realizing second purpose of the invention is：
A kind of method for preparing above-mentioned reverse osmosis membrane base material non-woven fabrics, to meet the technical requirements advocated by the aforementioned present invention
Synthetic fibers be original, machine is manufactured paper with pulp as technological equipment with wet type, the preparation method is comprised the following steps successively：
A, the hydrophilic pretreatment of raw fibre；Step a selects hydrophilic efficient surfactant, with water:High-efficiency activated dose=
1000:3 ~ 5 weight portions prepare circular treatment liquid of manufacturing paper with pulp；Will be by ES composite fibres：COPET/PET terylene composite fibres：PET terylene
Fiber=20 ~ 50%:20 ~ 50%:The raw fibre of 15 ~ 50% weight percentage proportionings is put in beater, by adding water
Beating dispersion is prepared into fibre stuff；The blender of storage slurry cylinder is opened, by aforementioned fibre stuff input storage slurry cylinder, and with described
The dilution of circular treatment liquid is dispersed to fiber in single shape and is suspended in underwater, and hydrophilic treated fibre stuff of manufacturing paper with pulp is obtained；
B, manufactures paper with pulp into net；Fibre stuff of manufacturing paper with pulp prepared by step a, is input into elevated tank with liquid pump, and keeps Water in Water Tank
The highly constant and stable water pressure in position；Thereafter it is delivered to by pipeline Jing flow controllers control technique flow and is manufactured paper with pulp in machine flow box,
Jing Duckbill types spout flows out again, and makes the fiber being suspended in serosity form polyaxial distribution；Then fibre stuff is manufactured paper with pulp by net
Front case bottom up is overflowed, and flows through horizontal buffer board, and after slowing down flow velocity, fibre stuff smoothly flow to the inclination of the machine of manufacturing paper with pulp
Manufacture paper with pulp online；Due to the proportion difference of 3 kinds of raw fibres, and it is ES compound fine to pass through further be layered floating to constitute upper strata
Dimension, lower floor be COPET/PET terylene composite fibres, and middle level for PET wash dimension fiber wash with ES composite fibres and COPET/PET
The composite fibre slurry of synthetic fibre composite fibre, is obtained the nonwoven fibre being made up of 3 layers of different material fiber containing moisture content Jing after dehydration
Dimension net；
C, drying and processing；Nonwoven web containing moisture prepared by Jing steps b, is continuously introduced into by horizontal net band flat
Implement drying and processing in net baking oven, drying temperature is controlled under the melting temperature of raw fibre；
D, for the first time hot melt roll, by the cutting optimal court upward of layer above the nonwoven web of Jing step c drying and processings
Under, it is continuously introduced into two roller hot presses enforcement hot melt and rolls and the base material non-woven fabrics semi-products are obtained, and it is upper in its 2 rolls
Metallic mirror surface roller of the roll for heat-conducting oil heating, its surface temperature are higher than top fiber layer ES composite fibres melting temperature 5 ~ 30
℃；And the surface in 2 rolls is coated with silicone elastomer bottom roll by topping roll conduction heating, its surface temperature is fine higher than lower floor
3 ~ 20 DEG C of Vc OPET/PET terylene composite fibres melting temperature；And the secondary linear velocity of roll and diddle-net, dry that net is synchronous and enforcement nothing
Stretch exercise；And the upper surface of nonwoven web is contacted with topping roll；And the underlying surfaces and bottom roll of nonwoven web
Contact；
E, cooling meat process, the base material non-woven fabrics semi-products that Jing steps d hot melt is rolled are continued through immediately preceding two rollers
Implement cooling in cooling zone after hot press；By cooling treatment make base material non-woven fabrics semi-products make thickness for 0.15 ~
The base material non-woven fabrics semi-finished product of 0.20mm；
F, second hot melt are rolled；Base material non-woven fabrics semi-finished product prepared by step e are continuously introduced into into three-roll hot-rolling mill reality
Apply hot melt again to roll；And the intermediate calender rolls of the three-roll hot-rolling mill are the metallic mirror surface roller of heat-conducting oil heating, its surface temperature is
120 ~ 150 DEG C, and its upper and lower roll is the resilient roller that silica gel is coated with by the surface of intermediate calender rolls conduction heating, its surface temperature
For 100 ~ 140 DEG C；Base material non-woven fabrics semi-finished product import three-roll hot-rolling mill after, by the intermediate calender rolls respectively with upper and lower roll institute
The 2 linear hot rolling points for constituting are derived, that is, the product substrate non-woven fabrics for meeting thickness calibration are obtained；
G, quality testing and winding；Base material non-woven fabrics manufactured goods obtained in step f are imported into quality detection device, by right
The defect and Thickness sensitivity on its surface, and after making actual observation record, rolling is wound by winder.
And net, step c drying and processing, step d first are manufactured paper with pulp in the hydrophilic pretreatment of the step a raw fibre, step b
Secondary hot melt is rolled, step e is shunk second hot melt of cooling treatment, step f and rolled, and the quality testing of step g with 7 steps of winding is
What continuous synchronization was carried out.
In above-mentioned technical proposal, the present invention also advocates：
The raw fibre of step a is 1.0 ~ 1.4 with the weight ratio of circular treatment water:1000.
The dehydration of step b, is to carry out vacuum dehydration after nonwoven web voluntarily drips draining again.
The oven temperature of the step c is 80 ~ 95 DEG C, and nonwoven web is 1.5 ~ 2min by the time of baking oven.
The line pressure of two roller hot presses of step d is not less than 50kg/cm；Its linear velocity is that 8 ~ 10m/min passes through first
The secondary thickness for heating the nonwoven web for rolling is 0.14 ~ 0.16mm.
The described middle roll surface temperature of step f is 120 ~ 140 DEG C, and upper and lower roll surface temperature is 110 ~ 120 DEG C；It is middle
Line pressure between roller and upper and lower roll is respectively 42kg/cm and 38kg/cm；And the operation linear velocity of three-roll hot-rolling mill is than step d
Two roller hot presses operation linear velocity it is big by 0.5 ~ 1%, make the cooling meat area being between three-roll hot-rolling mill and two roller hot presses
Base material non-woven fabrics semi-products longitudinally tighten, to control its shrinkage factor；After base material bonded fabric product is rolled by secondary hot melt
THICKNESS CONTROL is in the range of 0.07 ~ 0.15mm
Beneficial effects of the present invention are specifically described below in conjunction with above-mentioned steps a to f, but be not limited thereto.
Here should be noted that in the first technical scheme of the invention determined by reverse osmosis membrane base material non-woven fabrics original
Material fiber species, can ensure that the performance of the processing technology and reverse osmosis membrane that meet reverse osmosis membrane, this is because：
The characteristic 1 of the ES composite fibres, is constituted with double-component concentric structure, and the exodermiss of its fiber are poly- second
Alkene, 129 DEG C of melting temperature, the inner core of fiber is polypropylene, 165 DEG C of melting temperature.Pass through heating into after fleece in non-woven fabrics
To temperature higher than fiber surface polyethylene melting temperature when, the cross-connection point of the fiber of fleece and fiber produce fusing,
Bonding.And the polypropylene of fiber inner core is not up to melting temperature, fiber maintains the original state.The appearance of ES fibers in non-woven fabrics are constituted
Layer plays cementation, it may also be said to which it is viscose fibre.ES composite fibres characteristic 2, as the fiber is by polyethylene and polypropylene
It is composited using twin-screw extrusion technology in spinning, the proportion of its fiber is 0.91, and hydroscopicity is 0.The fiber is in wet method
Do not sink when manufacturing paper with pulp, float in water, dewing method is manufactured paper with pulp and brings certain difficulty.And step b of the present invention just utilizes this of the fiber
Feature.ES composite fibre characteristics, the percentage elongation of the fiber are 20%, and during fiber hot melting cohesion, shrinkage factor is little, the percent thermal shrinkage of fiber
For 1.5-2%, in the present invention, step d, e, f make use of this characteristic of the fiber.
The characteristic 1 of the COPET/PET terylene composite fibre, is that the fiber is made up of double-component concentric structure, fiber
Exodermiss be low-melting point polyester（COPET）, melting temperature be 110 DEG C, the inner core of fiber is polyester（PET）Melting temperature is
265℃.The fiber is composited using twin-screw extrusion technology in spinning.Fiber effect in non-woven fabrics composition is multiple with ES
Condensating fiber is identical, plays fibres bond effect.Its characteristic 2 is, the fiber by COPET polyester, PET polyester Jing spinning it is compound and
Into its proportion is 1.38, and hydroscopicity is 0.4%, and the lower floor of water is sunk to when wet nonwoven fabricss are manufactured paper with pulp.Step b profit in the present invention
With this characteristic of the fiber.It is 80-120% that its characteristic 3 is the percentage elongation of COPET/PET composite fibres, and fiber is in hot melting cohesion
When shrinkage factor it is big, percent thermal shrinkage is 8-10%.Step d, e of the present invention make use of this characteristic of the fiber.
The ultra-fine polyester fiber（PET）, the fiber melt temperature is 265 DEG C, and proportion is 1.38, hydroscopicity 0.4%, should
Fiber plays increase fiber lay down reticular density in non-woven fabrics composition, forms porous, the effect of small-bore.And PET and COPET and
ES constitutes the proportion of mixture between ES and COPET, constitutes intermediate layer so as to be between ES upper stratas and COPET lower floors.
Beneficial effects of the present invention one are：
The fiber that above-mentioned steps a have been prepared mixes slurry of manufacturing paper with pulp, and Jing water pumps are input in elevated tank, water in water tank
It is highly constant, to guarantee stable water pressure.Jing aqueducts flow through flow controller, control the flow needed for technique.Step b Jing
The Duckbill type jet that the flow of flow controller control fibre stuff is entered in flow box is projected to tank wall.Its injection flow velocity
About 8-10m/s.Current are overflowed upwards by the lower floor in flow box, and flow rate of water flow is slack-off.Current continue flow forward and set to before netting
On the horizontal buffer board put, horizontal buffer board length is 1.5-2m, and width is 1.2-1.3m, water when current are passed through on buffer board
Depth 4-5cm, the flows decrease of current to 15-20cm/s, current are 13-10s through the time of horizontal buffer board.Current exist
During horizontal buffer board, the composite fibre contained in current under gravity, COPET/PET composite fibres,
Proportion 1.38, fibre diameter 10-12 m（Small diameter fiber）Take the lead in gradually sinking down on horizontal buffer board, and continue with current direction
Front flowing.And ES composite fibres, 0.91 fibre diameter 15-22 m of proportion（Particle size fiber）, equally under gravity, ES is multiple
Condensating fiber gradually floats up to the upper strata of water, and with current flow forward.Contained PET polyster fibres proportion 1.38 in current
Fibre diameter 4-6 m（Superfine fibre）, as diameter is thin, small volume, under gravity, subsidence velocity is compared with COPET/ for fiber
PET is slow, and PET gradually sinks to down the middle level of water, and with current flow forward.Control the stream of water on horizontal buffer board
Fast 15-20cm/s, control current water on horizontal buffer board depth 4-5cm, such current when through horizontal buffer board, water
In contained different fibers divide upper, middle and lower-ranking, spatially shape is distributed in water.At least 2/3 ES composite fibres（Particle size
Fiber）On upper strata；At least 2/3 COPET/PET terylene composite fibres are in lower floor；Intermediate layer is PET ultra-fine polyester fibers and ES
The mixture of composite fibre and COPET/PET composite fibres.Contained in water different work(when horizontal buffer board of current
Can the fiber point upper, middle and lower-ranking of effect spatially shape is distributed in water, flow to inclined wire manufacture paper with pulp machine diddle-net on.Inclined wire is manufactured paper with pulp
Inclined wire angle 20-25 ° of machine, current carry fiber and flow on inclined wire, and water is flowed out from mesh, dehydration, and fiber is into net.Now fiber
Net is made up of the different fibers in three kinds of upper, middle and lower, is shaped to Single layer nonwoven fleece.
The fiber on the upper strata of the nonwoven web at least 2/3 is ES composite fibres composition（Particle size fiber）, as coating
Reverse osmosis membrane polysulfones solution coating face A faces.The lower floor of the nonwoven web is at least by 2/3 fiber by the compound fibres of COPET/PET
Dimension composition（Small diameter fiber）, as the uncoated face B faces of reverse osmosis membrane base material non-woven fabrics.Nonwoven web Jing subsequently heats,
After pressing technology, made by the A faces of base material non-woven fabrics be mainly made up of ES composite fibres（Particle size fiber）.And in A face thickness sides
Aperture to 1/3 thickness is larger, and when base material non-woven fabrics A faces are coated with polysulfones solution, solution easily infiltrates into thick to base material non-woven fabrics
The 1/3 of degree direction, after the polysulfones solution solidification of coating, to penetrate into and play anchorage effect inside base material non-woven fabrics, enhance coating
Polysulfone membrane and base material non-woven fabrics binding strength, be not easily stripped layering.And the fibre in the intermediate layer in base material nonwoven thickness direction
Dimension is mainly made up of PET superfine fibres, and formation base material nonwoven thickness direction intermediate layer fibre density is high, porosity is high, aperture is little,
Prevent the polysulfones solution of coating to penetrate further into, reduce the coating weight of polysulfones solution, reduce masking cost.
The present invention by multiple fiber, using the characteristic of various raw fibres, with non-woven fibre cloth made by single layer structure, it
Without the need for multilamellar difference fibre diameter, the different non-woven fabrics superimposions into network method.
Beneficial effects of the present invention two are：
By beneficial effects of the present invention one, the method for step a, b will be the composite fibre slurry for preparing input high-order
In water tank, highly constant, the holding water pressure invariableness of water in elevated tank is kept.Water flows through conveyance conduit through flow controller,
Control necessary flow, Jing pipelines are input in flow box and are ejected by Duckbill type spout.As the pressure of elevated tank is acted on, water
Flow the flow velocity about 8-10m/s in aqueduct.In water, contained fiber is moved with water, due to the water flow velocity in pipeline
Hurry up, in water contained fiber at the volley with inner-walls of duct friction, fibre length direction and the current advance side of water exercise
To being identical, it may also be said in single direction distribution when fiber is moved in the aqueduct.If not changing its fiber list
As soon as direction arranged distribution, is made into non-woven fabrics, then occur that longitudinal tensile strength is too strong, transverse tensile strength is too small to ask
Topic, its tensile strength ratio are 6：1, it is clear that the technical standard requirement of base material non-woven fabrics can not be met, also easily cause base material nonwoven
Cloth produces fold, wrinkle strip when polysulfones is coated with.
For this purpose, the present invention is provided with Duckbill type water jet in flow box, it is connected with water-supply-pipe outside flow box, in a high position
In the presence of tank pressure, current are sprayed to the inwall of flow box from Duckbill type spout with 8-10m/s speed, are collided,
And water in flow box, is filled with, in the presence of injection pressure, in case, the water of bottom produces rolling, contained fiber in water
Change single direction arranged distribution.Current are raised to top gap upwards by flow box bottom and flow to horizontal buffer board.Here
During contained fiber in current be distributed in water in crisscross shape.Current when horizontal relief area is flowed through, flow velocity
15-20cm/s and water flow stationary are greatly slowed to, the fiber in current still keeps crisscross shape, flow to manufacturing paper with pulp on inclined wire, take off
Water, is shaped to nonwoven web, and vertically and horizontally fiber compares 1.2 to its fleece in a jumble：1-1.3：1.Fleece Jing is subsequently heated
The vertically and horizontally tensile strength ratio of base material non-woven fabrics made by pressurization is 1.2：1~1.3：1.Wet nonwoven fabricss are with water to carry in itself
Body, made by the flow motion of water, generally existing longitudinal direction is bigger than difference with lateral pull.The present invention changes this existing
Shape.And be with beneficial effect of the present invention while, synchronous carry out, it is not necessary to technique and equipment in addition, it is not required that multilamellar
The vertically and horizontally different non-woven fabrics superimposion of tensile strength.Nonwoven web base material nonwoven made by after follow-up hot melt pressurization
Cloth, after which is coated with polysulfones solution, during 90 DEG C of hot water cleaning solidifications of Jing, even if the non-woven fabrics after being coated with this technical process are long
Longitudinally tense apart from open width and will not also produce longitudinal fold, wrinkle strip.
Beneficial effects of the present invention three are：
By beneficial effects of the present invention two, the nonwoven web obtained by step b imports continuous on the guipure of plain net baking oven
By baking oven, the moisture content contained by drying fibrous net, oven temperature are 90-95 DEG C, and the linear velocity for drying net is synchronous with net of manufacturing paper with pulp.
Nonwoven web after drying moisture content, upper layer is upward（A faces）Being continuously introduced into step d, e, f carries out heating, pressurizes, rolls, gluing
Knot, contraction.Fleece after for the first time hot melt pressurization of step d, the ES composite fibres contained by nonwoven web upper layer A faces
It is heated generation fusing with the CPOET/PET composite fibres contained by the B faces of fleece, fiber is produced with the cross-connection point of fiber
Adhesion, while enhancing the adhesive fastness of fiber junction point under the effect of the pressure.Base material after first time heating and rolling
Non-woven fabrics are continuously introduced into the cooling of step e, shrinking zone.Step f three-roll hot-rolling mill is entered afterwards.The operation of three-roll hot-rolling mill is accelerated in adjustment
Linear velocity, makes the base material non-woven fabrics run in cooling meat area longitudinally tighten, and controls its longitudinal contraction, and base material non-woven fabrics
Laterally（Width）Voluntarily shunk by which.In this contraction process, the coated face of base material non-woven fabrics（A faces）Fiber it is multiple by ES
Condensating fiber is constituted（Particle size fiber）, the percent thermal shrinkage of its fiber is 2-3%, and thus the A faces of base material non-woven fabrics are in cooling meat process
Middle shrinkage factor is little.And the uncoated face of base material non-woven fabrics（B faces）, it is made up of COPET/PET composite fibres, the thermal contraction of its fiber
Rate is 6-8%, and thus the shrinkage factor in base material non-woven fabrics B faces during cooling meat is big.In the base material non-woven fabrics of this traffic coverage
A faces, the contraction in B faces be while produce, due to the difference of A faces and the shrinkage factor in B faces, to make the widthwise central portion of base material non-woven fabrics
Divide upwards（A faces）Projection, and both sides are downward（B faces）Bending.Alternatively in the process using raw fibre shrinkage factor it
Difference, is that base material non-woven fabrics are provided with reverse prestressing force, after offsetting subsequent technique base material non-woven fabrics A faces coating polysulfones solution,
When polysulfones solution solidifies, produced one side shrinks, and solves in reverse osmosis membrane coating process running, coated film both sides to
The technical barrier of center curling.
It should be noted that beneficial effect of the present invention, two and three is carried out simultaneously, it is not necessary to which other processing steps set
It is standby.
Beneficial effect of the present invention four is：
Nonwoven web by obtained by step c continues through two roller mirror roller hot-rolling mill of step d, heated pressurization rolling
Afterwards, nip pressure is adjusted, the THICKNESS CONTROL to base material non-woven fabrics, is continuously introduced in 0.14-0.16mm behind cooling meat area
It is close to central roll in the A faces of the base material non-woven fabrics of three-roll hot-rolling mill（Heating mirror roller）B faces down and lower roll（Silicon rubber elastic roller）Connect
Touch, the THICKNESS CONTROL of pressure to base material non-woven fabrics of lower roll is adjusted in 0.11-0.12mm.Then the A faces of base material non-woven fabrics are close to
1/2, B of heating mirror roller circumference faces up and upper roller（Silicon rubber elastic rod）Contact, adjusts the pressure of upper roller, is forced into base material
Nonwoven thickness is controlled in the range of 0.09 ~ 0.11mm.Base material non-woven fabrics are rolled by first in this laser heating roller compaction process
During point, the top layer fusing of ES composite fibres and COPET/PET composite fibres produces adhesion strength, the undercoat that web surface is holded up
Floss strikes the beam and mutually bonds.As a result of the mirror roller that heating roller surface is smooth and bright like a mirror, the chopped fiber for having melted and minute surface
Roller is contacted, and reduces adhesion of the fiber to roller surface, so as to reduce after base material non-woven fabrics roll, when departing from hot roll by
Increase with hot roll surface adhesion in fiber, fiber undercoat floss is pulled up, the phenomenon for making then nonwoven surface fluff.Base material
When non-woven fabrics continue through three-high mill upper and lower and roll, the temperature of heating mirror roller is reduced to 130-140 DEG C, it may also be said to
The melt index of ES composite fibres is reduced, so as to reduce adhesion of the fiber to minute surface roller surface, while on further increasing,
The pressure of bottom roll, adjustment nonwoven thickness reach necessary requirement.The A faces of base material non-woven fabrics be all the time towards heating mirror roller,
The adhesive fastness between non-woven fabrics fiber is enhanced, the adhesion of fiber and roller surface is reduced, the A faces of base material non-woven fabrics would not
Fluffing.And the B faces of base material non-woven fabrics are by when rolling for three times, being that, towards silica gel roller, thus the B faces of base material non-woven fabrics are put down all the time
Slippery is reduced, and there is crude sense, and when being conducive to making reverse-osmosis membrane element, fastness is pasted with other objects in raising B faces.This
Bright chopped fiber wet nonwoven fabricss of having carefully studied after heating pressurization rolling, the reason for nonwoven surface is fluffed, using precision
Metallic mirror surface heating roller laser heating pressurization roll mill technical measures, so as to make base material non-woven fabrics A faces phozy, solve ultrashort
The universal phenomenon that fiber wet nonwoven fabricss surface is easily fluffed.
Foregoing invention beneficial effect one, two, three, four is the inherent character for taking full advantage of raw fibre, original wet
In method inclined wire papermaking process, local directed complete set technique, and Duckbill type nozzle is provided with, between horizontal buffer board and two groups of hot-rolling mills
Cooling meat area, and adopt surface acquired by the technical measures such as METAL HEATING PROCESS roller of accurate mirror.
After technical scheme is able to implement in full, the manufactured goods capability and performance which possesses is stable, technological process
Short, seriality is good, reaches one-shot forming and completes product manufacturing overall process, and low production cost, energy consumption are low, easy to operate easy to control, if
It is standby simple, it is self-evident the features such as small investment.
Description of the drawings
Fig. 1 is the structural representation of base material non-woven fabrics described in manufactured goods of the present invention.
Specific implementation method：
The invention will be further described with reference to embodiments, but is not limited thereto.
In each embodiment of described below, various raw materials used, unless otherwise indicated, are suitable for non-woven fabrics industry
Commercially available industrial goods.Efficient hydrophilic porous agent used selects anion surfactant PH6.5-7.5, effective active 70%.It is used to copy
The machine of making is that homemade wet method inclined wire is manufactured paper with pulp machine.Baking oven used is homemade hot blast plain net baking oven.Hot-rolling mill used is Jiangsu Jiangyin
The production of calender factory.
Embodiment 1, refers to accompanying drawing 1
The base material non-woven fabrics that a kind of wet method for reverse osmosis membrane is manufactured paper with pulp, pass through hot melt Jing after wet type is manufactured paper with pulp by synthetic fibers
Roll and form, and its：
A, the base material non-woven fabrics are in integrally single layer structure；
B, base material non-woven fabrics of the entirety in single layer structure, its synthetic fibers by 3 level different material of upper, middle and lower
Composition；
And its upper strata is low melting point hot melt ES composite fibres 1, and the ES composite fibres be by top layer PE polyethylene with it is interior
The circular concentric fiber constituted by core PP polypropylene；
And its lower floor is low melting point hot melt COPET/PET terylene composite fibre 2, and the COPET/PET terylene is compound fine
Dimension, is the circular concentric fiber being made up of with inner core PET polyester the modified COPET low-melting point polyesters in top layer；
And its intermediate layer is PET polyster fibres and ES composite fibres and the mixture of COPET/PET terylene composite fibres
Fiber 3；
C, in the base material non-woven fabrics raw material gross weight, ES composite fibres account for 20 ~ 50%, COPET/PET terylene and are combined
Fiber accounts for 20 ~ 50%, PET polyster fibres and accounts for 15 ~ 50%.
And in the base material non-woven fabrics raw material gross weight, ES composite fibres account for 30 ~ 40%, COPET/PET terylene and are combined
Fiber accounts for 30 ~ 40%, PET polyster fibres and accounts for 20 ~ 35%；The base material bonded fabric product thickness is 0.07 ~ 0.15mm..
And the melting temperature of the PE on the ES composite fibres top layer of the base material non-woven fabrics upper strata ES composite fibres 1 is 129 DEG C,
And the melting temperature of its inner core PP is 165 DEG C；The proportion of the ES composite fibres is 0.91, and percentage elongation is 20%, percent thermal shrinkage
For 2 ~ 3%, hydroscopicity is 0；
And the COPET/PET polyster fibres top layer of the base material non-woven fabrics lower floor COPET/PET terylene composite fibre 2 is modified
The melting temperature of COPET polyester is 110 DEG C, and the melting temperature of inner core PET polyester is 265 DEG C；The COPET/PET terylene is multiple
The proportion of condensating fiber is 1.38%, and percentage elongation is 80 ~ 120%, and percent thermal shrinkage is 8 ~ 12%, and hydroscopicity is 0.4%；
The proportion of the PET polyster fibres in the base material non-woven fabrics middle level is 1.38, and percentage elongation is 50 ~ 60%, and hydroscopicity is
0.4%.
A diameter of 15 ~ 22 μm of the ES composite fibres, length be 2 ~ 6mm, the diameter of COPET/PET terylene composite fibres
For 8 ~ 15 μm, length is 2 ~ 6mm, and PET polyster fibres are superfine fibres directly for 4 ~ 8 μm.
Embodiment 2：Refer to accompanying drawing 1：
A kind of preparation method of above-mentioned base material non-woven fabrics, with meet embodiment 1 the synthetic fibers of opinion technical requirements be
Raw material, manufactures paper with pulp machine as technological equipment with wet type, and its preparation process includes successively：
The hydrophilic pretreatment of a raw fibres：Tap water and efficient hydrophilic porous agent are used first, by weight 1000：4 mixing are matched somebody with somebody
Make hydrophilic recirculated water of manufacturing paper with pulp.Raw fibre is weighed by following weight：ES fibers（20 m length 4mm of diameter）
10.5kg.Accounting 35%；COPET/PET fibers（15 m length 4mm of diameter）10.5kg, accounting 35%;PET superfine fibres（Diameter 5
M length 2.5mm）9kg, accounting 30%.Raw fibre after weighing is put in beater the mixing beating that adds water.In beater cylinder
The weight proportion of water and fiber be 12：1.By in water in the fibre stuff accomplished fluently input storage slurry cylinder（Storage slurry cylinder volume 25M）It is dilute
Release, disperse, open blender.Fiber does not sink, and does not also bubble through the water column.Hydrophilic pretreatment of fiber slurry is obtained.Wherein raw material is fine
Dimension is 1.2 with the weight ratio of the recirculated water of manufacturing paper with pulp：1000.
B manufactures paper with pulp into net；Hydrophilic pretreatment of fiber slurry Jing water pumps prepared by step a are input to wet method inclined wire machine of manufacturing paper with pulp
Elevated tank.Keep height of water level in water tank constant.Jing aqueducts flow into flow controller, control flow 40M/h.Jing is defeated
The duckbilled spout that waterpipe is entered in flow box sprays（The basal area of duckbilled spout is 90cm × 0.7cm=63cm2）；In a high position
In the presence of tank pressure, the current of ejection roll in flow box collision movement, and the fiber contained in water becomes mixed and disorderly unordered,
It is crisscross.Current continue flow through horizontal buffer board, and when horizontal buffer board is passed through, its horizontal active cross-section area is current
120cm×5cm=600cm2Now the water flows gently, and flow velocity is slack-off, and flow velocity is 15-20cm/s.The fibre of the different specific weight contained in water
Dimension is sunk automatically, is floated, and flows to net of manufacturing paper with pulp.Fiber is ferreted out by net of manufacturing paper with pulp, dehydration, and the speed of service of net of manufacturing paper with pulp is 9m/min, Jing
Fleece after processed departs from net of manufacturing paper with pulp and constitutes nonwoven web；
C, drying and processing；The nonwoven web, continuously enters plain net hot-air oven by plain net band, implements at drying
Reason.In the range of 90 DEG C -95 DEG C, the speed of service for drying net is 9m/min to the temperature control of baking oven, and net is synchronous with manufacturing paper with pulp.Drying
The moisture that fleece contains, is obtained ES fibrous membranes in upper layer（A faces）, COPET/PET fibrous membranes layer below（B faces）, PET is fine
Dimension film is 1.2 in middle level, described 3 kinds of blended fiber ratios：1-1.3：1 weight is the drying of 75g/m, soap-free emulsion polymeization intensity
Fluffy nonwoven web.
D, heats for the first time and rolls；Nonwoven web obtained in step c is continuously introduced into into two roller hot presses.Nonwoven web
A face up with heating mirror roller contact；The B of nonwoven web is faced down and is contacted with elastic silicone rubber roller.Heating mirror roller
Surface temperature is 160 DEG C, and the operating linear velocity of roll is that 9m/min is synchronous with the linear speed of baking oven net, net of manufacturing paper with pulp.Roll is applied
Pressure, between roll, line pressure is 48kg/1cm.Nonwoven web is heated, is pressurizeed, molding bonded is base material non-woven fabrics semi-products.
Its thickness is 0.14-0.16mm.
E, cooling treatment；Base material non-woven fabrics semi-products enter cooling zone after departing from hot roll, continuously connect with cooling roller surface
Touch and pass through, reduce non-woven fabrics semi-products temperature, make the base material non-woven fabrics semi-products cross-direction shrinkage into thickness be by cooling treatment
The base material non-woven fabrics semi-finished product of 0.15-0.20mm；
F, second hot melt are rolled；The non-woven fabrics semi-finished product are continuously introduced into rolling between the lower roll of three-roll hot-rolling mill and central roll
Point.The A of non-woven fabrics semi-finished product is faced up and is contacted with central roll heating mirror roller；The B of non-woven fabrics semi-finished product faces down and lower roll elasticity
Silica gel roller is contacted.145 DEG C of heating minute surface roll surface temperature.Pressure is applied to bottom roll, line pressure is 42kg/1cm between roll,
Roll operating linear velocity is 9.1m/min.As the linear velocity of three-roll hot-rolling mill is more than the linear velocity of two roller hot presses, and make place
The non-woven fabrics semi-finished product of the cooling meat area operation between two roller hot presses and three-roll hot-rolling mill are longitudinally tightened, control non-woven fabrics half
Finished product longitudinal contraction, and non-woven fabrics semi-finished product is horizontal by its natural shrinking.Simultaneously because the ES fibers in non-woven fabrics semi-finished product A faces are received
Shrinkage is little（1.5%-3%）, and the contraction that non-woven fabrics semi-finished product A faces produce is also little（1.5%-3%）, while non-woven fabrics semi-finished product B faces
COPET/PET fibers shrinkage factor it is big（6%-8%）, and the shrinkage factor that non-woven fabrics B faces produce is also big（6%-8%）, thus formed
Longitudinal both sides of non-woven fabrics semi-finished product are bent to B faces, and the laterally middle portion of non-woven fabrics semi-finished product is raised to A faces.Through three rollers
Hot-rolling mill heating pressurization, after pressing, the A faces of non-woven fabrics semi-finished product define the different contraction prestressing force in two sides from B faces.Non-woven fabrics
Continue to run with after rolling a little between lower roll and central roll of the semi-finished product by three-roll hot-rolling mill, the A faces of non-woven fabrics semi-finished product are adjacent to centre
Roller heats mirror roller, and is close to mirror roller circumference 1/2, rolls a little into topping roll；The B faces of non-woven fabrics semi-finished product and topping roll elasticity
Silica gel roller is contacted.Topping roll is pressurizeed, line pressure is 40kg/1cm.Non-woven fabrics semi-finished product continue through hot rolling in the process
During machine, the A faces of non-woven fabrics semi-finished product are towards heating mirror roller all the time.The undercoat floss in non-woven fabrics semi-finished product A faces is pressed by continuous three times
, bond, and pressurize in three times, progressively compress nonwoven thickness, the undercoat floss and main fibre for making nonwoven surface enters one
Step is cemented, it is suppressed that the generation of base material non-woven fabrics semi-finished product A faces fluffing.The base material of prepared surface density 75g/m, thickness 0.12mm
Non-woven fabrics.Simultaneously B faces are to contact with silicon rubber elastic rod when being rolled by above-mentioned 3 all the time, keep then relative thick
Rough sense, is conducive to the bonding intensity in enhancing base materials non-woven fabrics B faces and other materials.Meet the technology of the present invention requirement so as to be obtained
Base material non-woven fabrics described in manufactured goods；
G, quality testing and winding；Base material non-woven fabrics finished product is imported into quality detection device, by the defect to its surface
And Thickness sensitivity, and make actual observation record, rolling is wound by winder.
Embodiment 3：A kind of preparation method of the base material non-woven fabrics, follow these steps to carry out
Step a, first with tap water and efficient hydrophilic porous agent by weight 1000：4 are hybridly prepared into hydrophilic circulation of manufacturing paper with pulp
Water.Raw fibre is weighed by following proportioning：ES fibers（18 m length 3mm of diameter）9.1kg, account for 33%；COPET/PET fibers（Directly
12 m length 4mm of footpath）9.6kg, account for 35%；PET superfine fibres（5 m length 3mm of diameter）8.8kg, account for 32%.Hydrophilic circulation of manufacturing paper with pulp
Water and total weight of fiber, than for 1000：1.1.Fiber after weighing is put into into mixing beating, the water in beater cylinder in beater
Weight ratio with fiber is 12：1.By be beaten in mixed fibre stuff input storage slurry cylinder it is hydrophilic manufacture paper with pulp in recirculated water, open
Open blender dilution, fiber be dispersed in water in a single state, do not emerge, do not sink.Hydrophilic pretreatment of fiber is obtained
Slurry.Hydrophilic recirculated water of manufacturing paper with pulp is 1000 with the weight ratio of fiber：1.And its step b to g is same as Example 2, face is obtained close
Degree weight 72g/m, the base material non-woven fabrics of thickness 0.11mm.Its correlated performance is shown in Table 1.
Embodiment 4：A kind of preparation method of the base material non-woven fabrics, follow these steps to carry out；
Step a, first with tap water and efficient hydrophilic porous agent by weight 1000：The hydrophilic recirculated water of manufacturing paper with pulp of 4 mixed preparing.
Weigh raw fibre by following proportioning：ES fibers（16 m length 5mm of diameter）7.5kg, account for 30%；COPET/PET fibers（Diameter
10 m length 6mm）10kg, account for 40%；PET superfine fibres（20 m length 6mm of diameter）7.5kg, account for 30%.By the raw material after weighing
Fiber is put into mixing beating in beater cylinder.Water in beater cylinder is 12 with the weight ratio of fiber：1, by the fiber after beating
Hydrophilic in slurry input storage slurry cylinder is manufactured paper with pulp in recirculated water, opens blender dilution, is dispersed to fiber in water in a single state,
Also do not emerge, do not sink, hydrophilic pretreatment of fiber slurry is obtained.Hydrophilic recirculated water of manufacturing paper with pulp with the weight ratio of fiber is
1000：1.1.B to g is same as Example 2 for its step.The base material non-woven fabrics of prepared surface density 70g/m, thickness 0.10mm.Its phase
Close performance and be shown in Table 1.
Embodiment 5：A kind of preparation method of the base material non-woven fabrics, follow these steps to carry out：
Step a, is by weight first 1000 with efficient hydrophilic porous agent with tap water：Hydrophilic the manufacturing paper with pulp of 4 mixed preparing is followed
Ring water.Weigh raw fibre by following proportioning：ES fibers（20 m length 2.5mm4.5kg of diameter, account for 20%；COPET/PET fibers
（8 m length 5mm of diameter）11.25kg account for 50%；PET superfine fibres（5 m length 2mm of diameter）6.75kg, account for 30%.After weighing
Raw fibre be put into mixing beating in beater cylinder.Water in beater cylinder is 12 with the weight ratio of fiber：1, after being beaten
Fibre stuff input storage slurry cylinder in it is hydrophilic manufacture paper with pulp in recirculated water, open blender dilution, be dispersed to fiber in water in single
One state, does not emerge, and does not also sink, and hydrophilic pretreatment of fiber slurry is obtained.Hydrophilic recirculated water and the weight of fiber of manufacturing paper with pulp
Than for 1000：0.9.B to g is same as Example 2 for its step.The base material non-woven fabrics of prepared surface density 68g/m, thickness 0.09mm.
Its correlated performance is shown in Table 1.
Embodiment 6：A kind of preparation method of the base material non-woven fabrics, follow these steps to carry out：
Step a, first with tap water and efficient hydrophilic porous agent by weight being 1000：The hydrophilic circulation of manufacturing paper with pulp of 4 mixed preparing
Water.Weigh raw fibre by following proportioning：ES fibers（18 m length 3.5mm of diameter）16.25kg, account for 50%；COPET/PET is fine
Dimension（13 m length 4.5mm of diameter）6.5kg, account for 20%；PET superfine fibres（6 m length 4mm of diameter）9.75kg, account for 30%.To claim
Raw fibre after weight is put into mixing beating in beater cylinder.Water in beater cylinder is 12 with the weight ratio of fiber：1, will beat
Hydrophilic in fibre stuff input storage slurry cylinder after slurry is manufactured paper with pulp in recirculated water, opens blender dilution, is dispersed to fiber in water
In single, do not emerge, liquid does not sink, hydrophilic pretreatment of fiber slurry is obtained.Hydrophilic recirculated water and the weight of fiber of manufacturing paper with pulp
Than for 1000：1.3.And its step b to g is same as Example 2.The base material nonwoven of prepared surface density 80g/m thickness 0.14mm
Cloth.
The correlated performance of the base material non-woven fabrics by prepared by above-described embodiment 2-6 is shown in Table 1
Table 1：
| Test event | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Surface density g/m | 75 | 72 | 70 | 67 | 80 |
| Thickness mm | 0.12 | 0.11 | 0.10 | 0.09 | 0.14 |
| Longitudinal strength N/1.5cm | 68 | 66 | 65 | 60 | 72 |
| Transverse strength N/1.5cm | 64 | 62 | 61 | 57 | 67 |
| Air permenbility CC/cm/S | 4.8-7.6 | 5.2-8.1 | 5.3-7.8 | 4.8-8.4 | 5.4-8.6 |
| Longitudinal contraction rate % | 0.8 | 0.5 | 0.3 | 0.6 | 0.3 |
| Lateral shrinkage % | 0.2 | 0.1 | 0.3 | 0.2 | 0.3 |
Note：The method of testing of indices in table 1, unless otherwise indicated, is performed both by electronics industry industry standard SJ/
T1071.1-1071.12-91.Air permenbility determines the assay method GB1T5453-1997 for performing textile fabric breathability.
The as shown by data tested by table 1, the sample of embodiment of the present invention 2-6, although respective surface density, weight, thickness
Differ, the diameter of raw fibre, length, proportioning combination are different, but each item data of its sample test meets reverse osmosiss
The base material non-woven fabrics performance specification of film.So as to overcome the deficiency of prior art, the original intention of the present invention is realized.
Claims (10)
1. a kind of wet method base material non-woven fabrics for reverse osmosis membrane, rolled by hot melt Jing after wet type is manufactured paper with pulp by synthetic fibers and
Into, it is characterised in that：
A, the base material non-woven fabrics are in integrally single layer structure；
B, base material non-woven fabrics of the entirety in single layer structure, it is made up of the synthetic fibers of the 3 layers of different material in upper, middle and lower；
And its upper strata is low melting point hot melt ES composite fibres（1）, and the ES composite fibres are by top layer PE polyethylene and inner core
The circular concentric fiber constituted by PP polypropylene；
And its lower floor is low melting point hot melt COPET/PET terylene composite fibres（2）, and the COPET/PET terylene composite fibre,
It is the circular concentric fiber being made up of with inner core PET polyester the modified COPET polyester in top layer；
And its intermediate layer is PET polyster fibres and ES composite fibres and the mixture fiber of COPET/PET terylene composite fibres
（3）；
C, in the base material non-woven fabrics raw material gross weight, ES composite fibres account for 20 ~ 50%, COPET/PET terylene composite fibres
Account for 20 ~ 50%, PET polyster fibres and account for 15 ~ 50%.
2. base material non-woven fabrics according to claim 1, it is characterised in that in the base material non-woven fabrics raw material gross weight,
ES composite fibres account for 30 ~ 40%, COPET/PET terylene composite fibres and account for 30 ~ 40%, PET polyster fibres and account for 20 ~ 35%；It is described
Base material bonded fabric product thickness is 0.07 ~ 0.15mm.
3. base material non-woven fabrics according to claim 1 and 2, it is characterised in that
The base material non-woven fabrics upper strata ES composite fibres（1）ES composite fibres top layer PE melting temperature be 129 DEG C, and its
The melting temperature of inner core PP is 165 DEG C；The proportion of the ES composite fibres be 0.91, percentage elongation is 20%, percent thermal shrinkage be 2 ~
3%, hydroscopicity is 0；
The base material non-woven fabrics lower floor COPET/PET terylene composite fibres（2）COPET/PET polyster fibres top layer be modified
The melting temperature of COPET polyester is 110 DEG C, and the melting temperature of inner core PET polyester is 265 DEG C；The COPET/PET terylene is multiple
The proportion of condensating fiber is 1.38, and percentage elongation is 80 ~ 120%, and percent thermal shrinkage is 8 ~ 12%, and hydroscopicity is 0.4%；
The proportion of the PET polyster fibres in the base material non-woven fabrics intermediate layer is 1.38, and percentage elongation is 50 ~ 60%, and hydroscopicity is
0.4%.
4. base material non-woven fabrics according to claim 1 and 2, it is characterised in that a diameter of the 15 ~ 22 of the ES composite fibres
μm, length is 2 ~ 6mm, and a diameter of 8 ~ 15 μm of COPET/PET terylene composite fibres, length is 2 ~ 6mm, and PET polyster fibres are
A diameter of 4 ~ 8 μm of superfine fibre.
5. a kind of method for preparing the base material non-woven fabrics as described in one of Claims 1-4, is advocated with meeting Claims 1-4
Technical requirements synthetic fibers be raw material, machine is manufactured paper with pulp as technological equipment with wet type, it is characterised in that the preparation method is wrapped successively
Include following steps：
A, the hydrophilic pretreatment of raw fibre；Step a selects hydrophilic efficient surfactant, with water:High-efficiency activated dose=
1000:3 ~ 5 weight portions prepare circular treatment liquid of manufacturing paper with pulp；Will be by ES composite fibres；COPET/PET terylene composite fibres：PET terylene
Fiber=20 ~ 50%:20 ~ 50%:The raw fibre of 15 ~ 50% weight percentage proportionings is put in beater, by adding water,
Beating dispersion is prepared into fibre stuff；The blender of storage slurry cylinder is opened, by aforementioned fibre stuff input storage slurry cylinder, and with aforementioned
The dilution of circular treatment liquid is dispersed to fiber in single shape and is suspended in underwater, and hydrophilic treated fibre stuff of manufacturing paper with pulp is obtained；
B, manufactures paper with pulp into net；Fibre stuff of manufacturing paper with pulp prepared by step a, is input into elevated tank with liquid pump, and keeps cistern water level high
Spend constant and stable water pressure；Thereafter it is delivered to by pipeline Jing flow controllers control technique flow and is manufactured paper with pulp in machine flow box, then Jing
Duckbill type spout flows out, and makes the fiber being suspended in slurry liquid form polyaxial distribution；Then before manufacturing paper with pulp fibre stuff by netting
Case bottom up is overflowed, and flows through horizontal buffer board, and after slowing down flow velocity, fibre stuff smoothly flow to the inclination of the machine of manufacturing paper with pulp and copies
Make online；Due to the proportion difference of 3 kinds of raw fibres, and it is ES compound fine to pass through further be layered floating to constitute upper strata
Dimension, lower floor be COPET/PET terylene composite fibres, and middle level for PET wash dimension fiber wash with ES composite fibres and COPET/PET
The fibre stuff of the mixture of synthetic fibre composite fibre, is obtained Jing after dehydration and constitutes one by 3 layers of different material fiber containing moisture content
Nonwoven web；
C, drying and processing；Nonwoven web containing moisture prepared by Jing steps b, is continuously introduced into plain net baking by horizontal net band
Implement drying and processing in case, drying temperature is controlled under the melting temperature of raw fibre；
D, for the first time hot melt roll, by layer above the nonwoven web of Jing step c drying and processings upward and cutting optimal down, even
The continuous two roller hot presses enforcement hot melt that imports rolls and the base material non-woven fabrics semi-products is obtained；And the topping roll in its 2 rolls
For the metallic mirror surface roller of heat-conducting oil heating, its surface temperature is higher than 5 ~ 30 DEG C of top fiber layer ES composite fibres melting temperature；And 2
Surface in individual roll is coated with the elastic bottom roll of silica gel by topping roll conduction heating, and its surface temperature is higher than lowermost fibre
3 ~ 20 DEG C of COPET/PET terylene composite fibres melting temperature；And the secondary linear velocity of roll is with diddle-net, baking net is synchronous and enforcement nothing is led
Stretch motion；And the upper surface of nonwoven web is contacted with topping roll；And the underlying surfaces of nonwoven web and bottom roll phase
Contact；
E, cooling meat process, the base material non-woven fabrics semi-products that Jing steps d hot melt is rolled are continued through immediately preceding two roller hot pressing
Implement cooling in cooling zone after machine；By cooling meat process make base material non-woven fabrics semi-products generate thickness be 0.15 ~
The base material non-woven fabrics semi-finished product of 0.20mm；
F, second hot melt are rolled；Base material non-woven fabrics semi-finished product prepared by step e are continuously introduced into three-roll hot-rolling mill to implement again
Secondary hot melt is rolled；And the intermediate calender rolls of the three-roll hot-rolling mill for heat-conducting oil heating metallic mirror surface roller, its surface temperature be 120 ~
150 DEG C, and its upper and lower roll is the resilient roller that silica gel is coated with by the surface of intermediate calender rolls conduction heating, its surface temperature is 100
~140℃；After base material non-woven fabrics semi-finished product import three-roll hot-rolling mill, constituted with upper and lower roll by the intermediate calender rolls respectively
2 linear hot rolling point is derived, that is, the product substrate non-woven fabrics for meeting thickness calibration are obtained；
G, quality testing and winding；Base material non-woven fabrics manufactured goods obtained in step f are imported into quality detection device, by its table
The defect and Thickness sensitivity in face, and after making actual observation record, rolling is wound by winder；
And net, step c drying and processing, step d heat for the first time is manufactured paper with pulp in the hydrophilic pretreatment of the step a raw fibre, step b
It is molten roll, the process of step e cooling meat, step f are heated for second and are rolled, and the quality testing of step g is with to wind 7 steps be continuous
Synchronously carry out.
6. the preparation method of base material non-woven fabrics according to claim 5, it is characterised in that the raw fibre of step a
Weight ratio with circular treatment water is 1.0 ~ 1.4:1000.
7. the preparation method of base material non-woven fabrics according to claim 5, it is characterised in that the dehydration of step b, be
Nonwoven web carries out vacuum dehydration after voluntarily dripping draining again.
8. the preparation method of base material non-woven fabrics according to claim 5, it is characterised in that the oven temperature of the step c
For 80 ~ 95 DEG C, nonwoven web is 1.5 ~ 2min by the time of baking oven.
9. the preparation method of base material non-woven fabrics according to claim 5, it is characterised in that two roller hot pressing of step d
The line pressure of machine is not less than 50kg/cm；Its linear velocity is 8 ~ 10m/min, by the thickness for heating the nonwoven web for rolling for the first time
Spend for 0.14 ~ 0.16mm.
10. the preparation method of base material non-woven fabrics according to claim 5, it is characterised in that the intermediate calender rolls table of step f
Face temperature is 120 ~ 140 DEG C, and upper and lower roll surface temperature is 110 ~ 120 DEG C；Line pressure difference between intermediate calender rolls and upper and lower roll
For 42kg/cm and 38kg/cm；And the operation linear velocity of three-roll hot-rolling mill is bigger by 0.5 than the two roller hot presses operation linear velocity of step d
~ 1%, the base material non-woven fabrics semi-products in the cooling meat area being between three-roll hot-rolling mill and two roller hot presses is longitudinally tightened,
To control its shrinkage factor；Base material bonded fabric product is by the secondary THICKNESS CONTROL heated after rolling in the range of 0.07 ~ 0.15mm.
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