CN108867154A - A kind of wet process substrate non-woven fabrics of the MBR plate membrane for water process and preparation method thereof - Google Patents
A kind of wet process substrate non-woven fabrics of the MBR plate membrane for water process and preparation method thereof Download PDFInfo
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- CN108867154A CN108867154A CN201810586031.8A CN201810586031A CN108867154A CN 108867154 A CN108867154 A CN 108867154A CN 201810586031 A CN201810586031 A CN 201810586031A CN 108867154 A CN108867154 A CN 108867154A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/06—Flat membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
- B01D69/105—Support pretreatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/102—Permeable membranes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/24—Polyesters
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses a kind of wet process substrate non-woven fabrics of MBR plate membrane for water process, and raw fibre includes main fibre and hot-melt prepreg machine；The material of the main fibre is PET；The hot-melt prepreg machine includes surface layer and inner core；The material on the surface layer is modified COPET；The material of the inner core is PET；The weight ratio of the main fibre is the 50~70% of total weight, and the weight ratio of the hot-melt prepreg machine is the 30~50% of total weight.And preparation method is by the hydrophilic pretreatment of raw material, diddle-net causes web, drying and processing, heats spreading, hot rolling thickness control, and quality testing is completed with 6 steps are wound.The step has the features such as having good quality, performance is stablized, and consistency is excellent, and process flow is short, and continuity is good, and one-pass molding, production cost is low, and easy operation control, equipment is simple, small investment with final gained finished product.
Description
Technical field
It is especially a kind of for being coated with the substrate non-woven fabrics for preparing MBR plate membrane the present invention relates to a kind of substrate non-woven fabrics
And preparation method thereof, belong to wet nonwoven fabrics technical field.
Background technique
Existing membrane bioreactor MBR technology has obtained apparent function in processing sanitary sewage and industrial wastewater
Effect.Wherein membrane module is the core of MBR, mainly uses hollow fiber film assembly and plate membrane group in engineering application at present
Part, plate membrane and hollow-fibre membrane have different characteristics, and the scope of application is also had any different.It is manufactured since the plate membrane strength of materials is high
Membrane ruggedness is high, and in actual motion use process, the service life of plate membrane is 1-2 times of hollow-fibre membrane, and has cleaning
The features such as period is long, easy cleaning, easily replaces.
And film group can not be made due to having the polymer coating monomer film-strength for being separated by filtration function extremely low in plate membrane
Part, it is necessary to which being combined into one with non-woven fabrics could use, therefore this non-woven fabrics becomes as the key basic material of MBR film.For
High performance plate membrane is made, the substrate non-woven fabrics as plate membrane must have excellent fiber networking and be uniformly distributed unanimously
Property, good microcellular structure, higher tensile strength, suitable Air permenbility, acid and alkali-resistance is anti-oxidant, and surface is phozy, deflection
It is small, the requirement such as consistency of thickness.
Since polysulfones film layer thickness is very thin（About 0.03-0.05mm), continue after substrate non-woven fabrics smooth surface coating behind
Hot water cleans, and in drying course, be likely to form film layer and the contraction of non-film layer heat are inconsistent, and cause coated surface longitudinal
Two sides crimp or generate wrinkle strip to center.Therefore the longitudinal direction of substrate non-woven fabrics and lateral pulling force ratio cannot be greater than 1.3:1, with
When preventing curing of coating, longitudinal two sides of film are crimped to center, and film not can be carried out.
In existing technology for coating, the substrate non-woven fabrics of MBR plate membrane generally selects meltblown to produce melt spraying non-woven fabrics,
Or the spun-bonded non-woven fabrics of spun-bond process production.Due to melt spraying non-woven fabrics, the fibre diameter of spinneret is single, it is difficult to coating solution is suitble to seep
Entering 1/2 or 1/3 requirement to inside non-woven fabrics, melt spraying non-woven fabrics diameter is single, it cannot accomplish that fibre diameter thickness is arranged in pairs or groups, and
The aperture of melt spraying non-woven fabrics, porosity, Air permenbility are difficult to control.Solution penetrates into excessive when the excessive film in aperture, and blocking non-woven fabrics is logical
Road, influences membrane module water yield, and waste note film liquid increases cost.If aperture is too small, film layer and substrate non-woven fabrics hold after film
Easily layering, removing, and melt spraying non-woven fabrics and spun-bonded non-woven fabrics generally use polyester slice PET for raw material, through spinneret or spinning
Journey forms non-woven fabrics.During subsequent spreading, since PET fiber softening point is small to melting range, in heating spreading
The textured fibre cross section for being difficult to control fiber cross section in journey is round, in heating pressurization spreading to platypelloid type or ellipse, comes
Adjust aperture and the Air permenbility of substrate non-woven fabrics.
In existing technology, the patent No.：CN104888627A (Environmental Studies institute of Heilongjiang Province）And CN102553456A
（University Of Tianjin) it proposes to terylene substrate non-woven fabrics progress hydrophilic modifying, the hydrophilic ability of non-woven fabrics is improved, there is no propose
The manufacturing method of substrate non-woven fabrics.MBR plate membrane is not mentioned to the technical requirements and characteristic of substrate non-woven fabrics, therefore is used yet
The non-woven fabrics of general technology is to be difficult to obtain qualified MBR diaphragm.
Summary of the invention
In order to solve the problems mentioned above in the background art, overcome after existing curing of coatings in conjunction with non-woven fabrics not
Jail, there is a situation where the non-woven fabrics of layering, removing, curling, deformation and non-single layer structure to need compound the case where could forming,
The present invention provides a kind of wet process substrate non-woven fabrics of MBR plate membrane for water process, and raw fibre includes main fibre
And hot-melt prepreg machine；The material of the main fibre is PET；The hot-melt prepreg machine includes surface layer and inner core；The table
The material of layer is modified COPET；The material of the inner core is PET；The weight ratio of the main fibre be total weight 50~
70%, the weight ratio of the hot-melt prepreg machine is the 30~50% of total weight.
Preferably, the fibre diameter of the hot-melt prepreg machine is 0.5~2dtex, fibre length is 2~5mm；The master
The fibre diameter of body fiber is 0.3~2dtex, and fibre length is 2~5mm.
Preferably, the surface layer（1）Melting temperature is 110 °C~195 °C, inner core（2）Melting temperature is 250 DEG C；It is described
Main fibre melting temperature is 250 DEG C；The hydroscopicity of the raw fibre is 0.4%, and percent thermal shrinkage is 8~12%.
Preferably, the preparation method successively includes the following steps：
A, the hydrophily pretreatment of raw fibre：Step a selects hydrophilic efficient surfactant, the circular treatment that will manufacture paper with pulp liquid and
Raw fibre is put into beater, and by the way that prepared circular treatment water is added, mashing dispersion is prepared into fibre stuff；By fiber
In slurry investment storage slurry cylinder, and the blender of storage slurry cylinder is opened, fibre stuff dilution is dispersed to fiber in single shape and suspension
In water, hydrophilic treated fibre stuff of manufacturing paper with pulp is made；
B manufactures paper with pulp into web：Fibre stuff of manufacturing paper with pulp prepared by step a is inputted in high-order pressure water tank with liquid pump, keeps water level
Highly constant and stable water pressure controls technique flow through flow controller, water distributor and water is arranged before the net in water tank
Flow injection pipe；Fibre stuff flow to inclination net of manufacturing paper with pulp through flow box and carries out being dehydrated into fiber wet web；
C, drying and processing：It is imported on plain net band, is continuously entered at baking oven drying by the fiber wet web that horizontal net prepares step b
Reason, oven temperature control below raw fibre melting temperature；With heating metal rod in upper, first hot-rolling mill of the transmission rod under
Web and transmission plain net are subjected to hot pressing together, web tentatively bonds, and the second hot-rolling mill reality can be continued on to after off-grid
It applies；
D heats spreading：The web tentatively bonded through the first hot-rolling mill is imported into the second hot-rolling mill implementation hot melt spreading and is made
The substrate non-woven fabrics of intensity is generated, and the upper roller in two rolls is the metallic mirror surface roller of heat-conducting oil heating, roll surface temperature
Degree is higher than fiber melt temperature, and lower roll is using composite roll as transmission rod；
E, hot rolling thickness control：Implement non-woven fabrics for third milling train is continuously introduced into through substrate non-woven fabrics obtained by step d
Thickness rolling, adjusts nip pressure, and the substrate non-woven fabrics for meeting thickness requirement is made；The third hot-rolling mill upper roller is conduction oil
The metallic mirror surface roller of heating, roll surface temperature are lower than fiber melt temperature, and lower roll is using compound rod as live-roller；
F, quality testing and winding：Substrate non-woven fabrics manufactured goods made from step e are imported into defect and thickness detecting system, automatically
Detection record data, are counted by winding meter counter and are wound；
Preferably, fiber described in step a online flow be 40~60M3 per hour；Water in the circular treatment liquid of manufacturing paper with pulp：It is living
Property agent ratio be 1000:4~6；Fibrous raw material mashing is than being 1000 in the fibre stuff:30~40；In the storage slurry cylinder
Water and fiber specific gravity be 1000:0.5~0.9.
Preferably, step b manufactures paper with pulp web dehydration be with vacuum pump suction dehydration, fibre diameter crude fibre, in
Fiber, finer fiber and superfine fibre, the web of the fiber composition of four kinds of different-diameters.
Preferably, the oven temperature of the step c drying and processing is 50~80 °C, the time that web passes through baking oven is
1.5~2min, the rolling of the first rolling mill strip net, metalling roll surface temperature are 130~160 °C, and line pressure is roll self weight.
Preferably, the step d heats 210~232 °C of spreading metalling roll surface temperature, roll line pressure is 70~
90kg/cm, compound roll surface temperature are 110~120 °C, and hardness is 70~90 degree.
Preferably, the step e hot rolling thickness control：160~190 °C of metallic mirror surface roll surface temperature, compound rod table
Face temperature is 100~120 °C, and roll line pressure adjusts nonwoven thickness between 60~100kg/cm.
Preferably, the hydrophilic pretreatment of step a raw material, step b diddle-net causes web, step c drying and processing, step
D heats spreading, step e hot rolling thickness control, and 6 steps of step f quality testing and winding are that continuous synchronization carries out.
Compared with prior art, the beneficial effects of the invention are as follows：
1. carse, medium and small, ultra-fine fibre that is above-mentioned steps a is prepared, being designed by the requirement of substrate non-woven fabrics aperture, Air permenbility
Mixed slurry is tieed up, inputs high water tank through water pump, height of water level is constant in water tank, to guarantee water pressure invariableness.Through aqueduct stream
Amount controller, control water flow to required technique flow.The proportion of step a raw fibre makes full use of in this technical process
The characteristic that wet process is manufactured paper with pulp, can with the fiber of different materials, different-diameter, different length, different characteristics functional fibre, press
Technique requires mixing match.The identical area average weight of obtained non-woven fabrics can be obtained different apertures, porosity and breathe freely
Amount, by the technical requirements of non-woven fabrics, adjusts carse, medium and small, the ultra-fine formula of fiber, operation controllability is simpler, and general
Non-woven fabrics craft technology cannot achieve.
2. manufacturing paper with pulp into web according to step b, fibre stuff is assigned to pipe inspection extremely through flow controller, flow distributor
It surfs the Internet on tank inner wall, fiber contained in water flows together with water, since the flow velocity in pipeline is fast, the fiber contained in water
In operation with inner wall of the pipe friction, the fibre length direction of underwater exercise and water flow direction of advance are identical in pipeline.This
Water distributor and water flow jet pipe is arranged in flow box section in invention, is filled with water in flow box, under the effect of jet pressure power,
The water of water tank lower part generates rolling, and fiber contained in water changes single direction arranged distribution, forms multi-direction mixed and disorderly point
Cloth, water flow rise to top gap by flow box lower part and flow to horizontal buffer board, and the fiber in flows decrease water flow is still at this time
It keeps being in criss-cross shape.Water flow to diddle-net inclined wire drainage, is molded into non-woven fabrics fiber net, meets substrate nonwoven fabric technology and want
It asks.Substrate non-woven fabrics obtained by step a of the present invention after subsequent wet manufactures paper with pulp hot rolling, the uniformity of substrate non-woven fabrics, aperture,
Porosity, which is conducive to meet coating liquid, to be infiltrated at the 1/2 of nonwoven thickness, and the combination anchoring strength of coating and non-woven fabrics is good, is not easy
Delamination.Non-woven fabrics obtained by step b of the present invention is after subsequent drying hot rolling, by the mixed and disorderly than being 1.2 of wet web fiber:
1 or 1.3:1, the vertically and horizontally pulling force ratio of non-woven fabrics is 1.2 after hot rolling:1 or 1.3:1, it thus solves substrate non-woven fabrics and is applying
In membrane process, because substrate non-woven fabrics vertically and horizontally pulling force than excessive, and cause two sides of diaphragm to central reduction crimp, coating process
The defect that cannot proceed normally.
3. fiber wet web is imported on plain net band by horizontal net, continuously enters baking oven by the fiber wet web prepared by step b
Drying and processing.And use the first hot-rolling mill and hot pressing is carried out simultaneously to transmission plain net and web, metalling roll surface temperature is
130-160 °C, which makes web surface fiber generate hot adhesion, shape within the scope of the initial melting temperature of COPET/PET fiber
At certain tension intensity, simultaneous transmission plain net bottom live-roller is room temperature, and web bottom will not generate bonding with transmission plain net,
Thus web can smoothly be detached from transmission plain net into the second hot-rolling mill, copy to solve polyester fiber non-woven fabrics wet process
Make the technical problem of rear hot melting cohesion.
4. there is the web obtained by step c of the present invention with preliminary adhesion strength to be continuously introduced into the second hot-rolling mill, into
Row hot rolling, the second hot-rolling mill upper roller are heating metallic mirror surface roller, and lower roll is non-heated vulcanie roller, metallic mirror surface roller surface
Temperature is 228-235 °C.Near or above the melting temperature of COPET/PET fiber, the line pressure of roll pressurization is 60-90kg/
Cm is heated in pressing technology engineering, substrate non-woven fabrics COPET/PET fiber skin as contained in substrate non-woven fabrics herein
Layer has been approached or bonds more than hot melting temperature and other fibers.Substrate non-woven fabrics intensity is greatly improved, thickness decline,
Aperture reduces.In order to which substrate non-woven fabrics film is made to the optimum aperture in aperture, porosity and Air permenbility.In the diameter of raw fibre
Proportion is arranged by different ratios using carse, medium and small, superfine fibre, formation substantially conforms to coating process to the aperture of substrate non-woven fabrics
Air permenbility requirement.During heating pressing technology herein simultaneously, the temperature and pressure of heating roller is adjusted, the cross section of fiber is become
Shape, by it is original it is round be pressed onto platypelloid type or ellipse, the deformation of fiber is pressed further by the area of reduced bore.Adjust heating
Pressure, the temperature of roller can be precisely controlled aperture and the Air permenbility of substrate non-woven fabrics, meet coating process to substrate non-woven fabrics
The requirement of different pore size, Air permenbility.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the hot melt of low melting point described in manufactured goods of the present invention terylene composite fibre COPET/PET.
Fig. 2 is the parameter lookup table of present pre-ferred embodiments and comparative example.
Such as figure：1. surface layer, 2. inner cores.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1：
A kind of wet process substrate non-woven fabrics of the MBR plate membrane for water process, raw fibre include that main fibre and hot melt are viscous
Tie fiber；The material of the main fibre is PET；The hot-melt prepreg machine includes surface layer and inner core；The material on the surface layer
For modified COPET；The material of the inner core is PET；The weight ratio of the main fibre is the 60% of total weight, and the hot melt is viscous
The weight ratio for tying fiber is the 40% of total weight.The fibre diameter of the hot-melt prepreg machine is 2dtex, fibre length 5mm；
The fibre diameter of the main fibre is 2dtex, fibre length 5mm.Hot-melt prepreg machine surface layer melting temperature is
150 °C, inner core melting temperature is 250 DEG C；The main fibre melting temperature is 250 DEG C；The hydroscopicity of the raw fibre is
0.4%, percent thermal shrinkage 12%.
Embodiment 2：
The preparation method of the wet process substrate non-woven fabrics of MBR plate membrane for water process successively includes the following steps：
A, the hydrophily pretreatment of raw fibre：Step a selects hydrophilic efficient surfactant, by water：The ratio of activating agent
By 1000:5 prepare circular treatment liquid of manufacturing paper with pulp, and are 30~50% by low melting point hot melt terylene composite fibre COPET/PET（Specific gravity accounts for
35 ~ 45% with relatively good, and it is best that specific gravity accounts for 38 ~ 42% proportions）, polyester fiber 2 is 50~70%（Specific gravity accounts for 55 ~ 65% with comparing
Good, it is best that specific gravity accounts for 58 ~ 62% specific gravity）Ratio be made into the fiber of raw material and be put into beater.The substrate non-woven fabrics fiber is long
Degree is 2 ~ 5mm, best in 2.5 ~ 4mm, and by the way that prepared circular treatment water is added, mashing dispersion is prepared into fibre stuff；It will
Fibrous raw material mashing is than being 1000:In the 40 fibre stuff investment storage slurry cylinders prepared, and the blender of storage slurry cylinder is opened, makes water
In fiber be dispersed in single shape, fiber does not sink in water, do not climb up on top of the water yet on, be uniformly suspended in single shape
In water, water and fiber specific gravity in storage slurry cylinder are 1000:0.8, fibre stuff dilution is dispersed to fiber in single shape and suspension
In water, hydrophilic treated fibre stuff of manufacturing paper with pulp is made；
B manufactures paper with pulp into web：Fibre stuff of manufacturing paper with pulp prepared by step a is inputted in high-order pressure water tank with liquid pump, keeps water level
Highly constant and stable water pressure, the interior setting water distributor of the water tank and water flow jet pipe；Water delivery through high water tank bottom
Pipeline flows through flow controller.Controller flow 50m3/h, the flow distributor for entering flow box through aqueduct distributes, by dividing
With on the supreme net tank inner wall of pipe inspection.It sprays flow velocity about 8-10m/s, and water bottom in this case is rolled.The fibre contained in water
Dimension is overflowed upwards by lower part in case in mixed and disorderly non-directional distribution, water flow, slows down the flow velocity of water flow through horizontal buffer area, then put down
On unhurried current to inclined wire, this technical process, water flow passes through the cross-sectional area 60cm2 of the injection pipe of flow distributor, and water flow spills over water
The active cross-section area of flat buffer area is 120 × 5=600cm2, and water flow velocity greatly slows down.It is aspirated through vacuum pump, sucks web
Middle about 80% moisture content, is prepared into the web containing moisture.It is constant in the flow of water at this time, the fibre contained in recirculated water of manufacturing paper with pulp
Under the premise of dimension concentration is constant, manufacture paper with pulp net, baking oven plain net conveyer belt, the first hot-rolling mill, the second hot-rolling mill, third hot rolling are opened
Machine, winder frequency control motor isochronous controller, run simultaneously each transmission section linear velocity, adjust linear speed about
7.5m/min, calculation formula：（Flow × fibre concentration per minute）÷（Design every square meter weight × web width）=linear speed
Degree/min；
C, drying and processing：It is imported on plain net band, is continuously entered at baking oven drying by the fiber wet web that horizontal net prepares step b
Reason, oven temperature control is at 80 °C hereinafter, it is preferred that moisture in 60 ~ 70 °C of drying fibrous nets of temperature, controls fiber with temperature
Shrinking percentage, web does not occur and is broken on foraminous conveyer, or generates web crack due to filament contraction.With heating gold
Belong to rod upper, web and transmission plain net are carried out hot pressing by first hot-rolling mill of the rubber stick under together, and web surface layer occurs
Incipient melting molding bonded, and the round floor of web and foraminous conveyer surface layer, due to passing through the contact dotted line time between upper and lower two roller
It is very short（About 0.3S）, and the non-heated roller of lower roll rubber rollers, so adhesion will not occur for web and foraminous conveyer, it can be smooth
Disengaging foraminous conveyer, the implementation of the second hot-rolling mill can be continued on to after off-grid；
D heats spreading：The web tentatively bonded through the first hot-rolling mill is imported into the second hot-rolling mill implementation hot melt spreading and is made
The substrate non-woven fabrics of intensity is generated, and the upper roller in two rolls is the metallic mirror surface roller of heat-conducting oil heating, roll surface temperature
Degree is higher than fiber melt temperature, and lower roll is using composite roll as transmission rod；185 ~ 200 °C of mirror surface roll surface temperature, preferably 190 ~
195 °C, composite roll is non-heated roller, after substrate non-woven fabrics imports, is pressurizeed to roll, and line pressure is 40 ~ 60kg/cm, preferably
50kg/cm, this hot rolling technical process, since the surface temperature of heating mirror roller has reached the fusing point temperature of COPET fiber sheath
Degree, COPET/PET fiber sheath fusing, bonds with PET fiber generate tension intensity under the effect of the pressure；
E, hot rolling thickness control：Implement non-woven fabrics for third milling train is continuously introduced into through substrate non-woven fabrics obtained by step d
Thickness rolling, adjusts nip pressure, and the substrate non-woven fabrics for meeting thickness requirement is made；The third hot-rolling mill upper roller is conduction oil
The metallic mirror surface roller of heating, roll surface temperature are lower than fiber melt temperature, and lower roll is using compound rod as live-roller；, heat mirror roller
Surface temperature be 120 ~ 140 °C, preferably 125 ~ 135 °C, 120 ° of composite roll hardness, substrate non-woven fabrics import milling train after to roll
Apply pressure, roll line pressure adjusts between 60kg/cm ~ 100kg/cm, so that the thickness of substrate non-woven fabrics is met design thickness and want
Ask, simultaneously because the operating temperature of mirror surface roller surface is within the scope of the softening incipient melting of COPET/PET fiber, due to being under pressure and
The effect of elastic hardness, the cross section of COPET/PET fiber is deformed to platypelloid type or ellipse, to further compress base
The superficial layer of material non-woven fabrics（Smooth surface）Aperture；
F, quality testing and winding：Substrate non-woven fabrics manufactured goods made from step e are imported into defect and thickness detecting system, automatically
Detection record data, are counted by winding meter counter and are wound；
Finally obtained surface density 80g/m2 substrate non-woven fabrics, related technical performance index are shown in Table 1.
Embodiment 3：
A kind of preparation method of the wet process substrate non-woven fabrics of the MBR plate membrane for water process, follows these steps to carry out：By hot melt
Viscose fibre COPET/PET fibre diameter 2dtex, length 3mm, accounting 38%, PET fiber diameter 1.5dtex, length 4mm are accounted for
Than 25%, PET fiber diameter 1dtex, length 3mm, accounting 20%.PET superfine fibre diameter 0.3dtex, length 2mm, accounting
17%, it puts into beater and is mixed with beating after fiber is weighed, divide in recirculated water in the fibre stuff input storage slurry cylinder after mashing
It dissipates, stirring.Its step is same as Example 1.Adjusting linear velocity is that substrate non-woven fabrics surface density 90g/m2 is made in 6.7m/min.,
Its related technical performance index is shown in Table 1.
Embodiment 4：
A kind of preparation method of the wet process substrate non-woven fabrics of the MBR plate membrane for water process, follows these steps to carry out：By hot melt
Viscose fibre COPET/PET fibre diameter 1.5dtex, length 5mm, accounting 42%, PET particle size fibre diameter 2dtex, length
2.5mm, accounting 28%, PET superfine fibre diameter 0.3dtex, length 2mm, accounting 30% are put into beater after fiber is weighed
It is mixed with beating, dispersion, stirring in recirculated water in the fibre stuff input storage slurry cylinder after mashing.Its step is same as Example 1.It adjusts
Whole linear velocity is that substrate non-woven fabrics surface density 95g/m2 is made in 6.2m/min., and related technical performance index is shown in Table 1.
Embodiment 5：
A kind of preparation method of the wet process substrate non-woven fabrics of the MBR plate membrane for water process, follows these steps to carry out：By hot melt
Viscose fibre COPET/PET fibre diameter 1.2dtex, length 3mm, accounting 40%, PET particle size fibre diameter 2dtex, length
4mm, accounting 30%, PET fiber diameter 1.5dtex, length 4mm, accounting 10%.PET fibre diameter 0.5dtex, length 2mm,
Accounting 20% puts into beater after fiber is weighed and is mixed with beating, in the fibre stuff input storage slurry cylinder after mashing in recirculated water
Dispersion, stirring.Its step is same as Example 1.Adjusting linear velocity is that substrate non-woven fabrics surface density 75g/m is made in 8.4m/min.
2, related technical performance index is shown in Table 1.
Comparative example 1：
A kind of preparation method of the wet process substrate non-woven fabrics of the MBR plate membrane for water process, follows these steps to carry out：By hot melt
Viscose fibre COPET/PET fibre diameter 2dtex, length 4mm, accounting 40%, PET particle size fibre diameter 2dtex, length 3mm,
Accounting 50%, PET fiber diameter 1.2dtex, length 2mm, accounting 10%. put into beater after fiber is weighed and are mixed with beating,
Dispersion, stirring in recirculated water in fibre stuff input storage slurry cylinder after mashing.Its step is same as Example 1.Adjust linear velocity
The line pressure 100kg/cm of third hot-rolling mill is adjusted for 6.7m/min..Substrate non-woven fabrics surface density 90g/m2 is made, in relation to skill
Art performance indicator is shown in Table 1.
Comparative example 2：
A kind of preparation method of the wet process substrate non-woven fabrics of the MBR plate membrane for water process, follows these steps to carry out：By hot melt
Viscose fibre COPET/PET fibre diameter 1dtex, length 3mm, accounting 42%, PET fiber diameter 1dtex, length 4mm, accounting
20%, PET superfine fibre diameter 0.3dtex, length 2mm, accounting 38%. put into beater after fiber is weighed and are mixed with beating,
Dispersion, stirring in recirculated water in fibre stuff input storage slurry cylinder after mashing.Its step is same as Example 1.Adjust linear velocity
The line pressure 50kg/cm of third hot-rolling mill is adjusted for 8.4m/min..Substrate non-woven fabrics surface density 75g/m2 is made, in relation to skill
Art performance indicator is shown in Table 1.
Table 1：Embodiment and comparative example parameter lookup table
In test table above：Example 2-5 test result meets MBR plate membrane to the technical requirements of substrate non-woven fabrics.Comparative example 1
Since fiber diameters content 2dtex thick in substrate non-woven fabrics is 90%, substrate non-woven fabrics aperture is big, and Air permenbility is big.In preparation process
Although the 3rd hot-rolling mill line pressure is increased to 100kg/cm, after fibre deformation, the effect of reduced bore is not achieved.Comparative example 2. by
The superfine fibre content in substrate non-woven fabrics：0.3dtex is 38%, and substrate non-woven fabrics aperture is small, and Air permenbility is lower.In preparation work
Although the line pressure of third hot-rolling mill is is down to 50kg/cm in skill, fiber cross sections deform very little, not up to improve Air permenbility
Effect.It can be seen that the substrate non-woven fabrics of comparative example 1, comparative example 2, fibre diameter thickness proportion is unreasonable, has exceeded the 3rd heat
The deformation range of fiber cross-sectional after milling train pressurization.3rd hot-rolling mill is aperture and the Air permenbility of control accurate substrate non-woven fabrics, adjustment
Range is smaller.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of wet process substrate non-woven fabrics of the MBR plate membrane for water process, it is characterised in that：Its raw fibre includes main body
Fiber and hot-melt prepreg machine；The material of the main fibre is PET；The hot-melt prepreg machine includes surface layer（1）And inner core
（2）；The surface layer（1）Material be modified COPET；The inner core（2）Material be PET；The weight ratio of the main fibre
It is the 50~70% of total weight, the weight ratio of the hot-melt prepreg machine is the 30~50% of total weight.
2. the wet process substrate non-woven fabrics for the MBR plate membrane of water process according to claim 1, it is characterised in that：It is described
The fibre diameter of hot-melt prepreg machine is 0.5~2dtex, and fibre length is 2~5mm；The fibre diameter of the main fibre is
0.3~2dtex, fibre length are 2~5mm.
3. the wet process substrate non-woven fabrics for the MBR plate membrane of water process according to claim 1, it is characterised in that：It is described
Surface layer（1）Melting temperature is 110 °C~195 °C, inner core（2）Melting temperature is 250 DEG C；The main fibre melting temperature is
250℃；The hydroscopicity of the raw fibre is 0.4%, and percent thermal shrinkage is 8~12%.
4. a kind of prepare the preparation method for the wet process substrate non-woven fabrics of the MBR plate membrane of water process as described in claim 1,
It is characterized in that, the preparation method successively includes the following steps：
A, the hydrophily pretreatment of raw fibre：Step a selects hydrophilic efficient surfactant, the circular treatment that will manufacture paper with pulp liquid and
Raw fibre is put into beater, and by the way that prepared circular treatment water is added, mashing dispersion is prepared into fibre stuff；By fiber
In slurry investment storage slurry cylinder, and the blender of storage slurry cylinder is opened, fibre stuff dilution is dispersed to fiber in single shape and suspension
In water, hydrophilic treated fibre stuff of manufacturing paper with pulp is made；
B manufactures paper with pulp into web：Fibre stuff of manufacturing paper with pulp prepared by step a is inputted in high-order pressure water tank with liquid pump, keeps water level
Highly constant and stable water pressure controls technique flow through flow controller, water distributor and water is arranged before the net in water tank
Flow injection pipe；Fibre stuff flow to inclination net of manufacturing paper with pulp through flow box and carries out being dehydrated into fiber wet web；
C, drying and processing：It is imported on plain net band, is continuously entered at baking oven drying by the fiber wet web that horizontal net prepares step b
Reason, oven temperature control below raw fibre melting temperature；With heating metal rod in upper, first hot-rolling mill of the transmission rod under
Web and transmission plain net are subjected to hot pressing together, web tentatively bonds, and the second hot-rolling mill reality can be continued on to after off-grid
It applies；
D heats spreading：The web tentatively bonded through the first hot-rolling mill is imported into the second hot-rolling mill implementation hot melt spreading and is made
The substrate non-woven fabrics of intensity is generated, and the upper roller in two rolls is the metallic mirror surface roller of heat-conducting oil heating, roll surface temperature
Degree is higher than fiber melt temperature, and lower roll is using composite roll as transmission rod；
E, hot rolling thickness control：Implement non-woven fabrics for third milling train is continuously introduced into through substrate non-woven fabrics obtained by step d
Thickness rolling, adjusts nip pressure, and the substrate non-woven fabrics for meeting thickness requirement is made；The third hot-rolling mill upper roller is conduction oil
The metallic mirror surface roller of heating, roll surface temperature are lower than fiber melt temperature, and lower roll is using compound rod as live-roller；
F, quality testing and winding：Substrate non-woven fabrics manufactured goods made from step e are imported into defect and thickness detecting system, automatically
Detection record data, are counted by winding meter counter and are wound.
5. the preparation method for the wet process substrate non-woven fabrics of the MBR plate membrane of water process according to claim 4, feature
It is：Fiber described in step a online flow be 40~60M3 per hour；Water in the circular treatment liquid of manufacturing paper with pulp：Activating agent
Ratio is 1000:4~6；Fibrous raw material mashing is than being 1000 in the fibre stuff:30~40；It is described storage slurry cylinder in water and
Fiber specific gravity is 1000:0.5~0.9.
6. the preparation method for the wet process substrate non-woven fabrics of the MBR plate membrane of water process according to claim 4, feature
It is：Step b manufacture paper with pulp web dehydration be with vacuum pump suction dehydration, it is fibre diameter crude fibre, middle fiber, relatively thin fine
Peacekeeping superfine fibre, the web of the fiber composition of four kinds of different-diameters.
7. the preparation method for the wet process substrate non-woven fabrics of the MBR plate membrane of water process according to claim 4, feature
It is：The oven temperature of the step c drying and processing is 50~80 °C, and the time that web passes through baking oven is 1.5~2min, the
The rolling of one rolling mill strip net, metalling roll surface temperature are 130~160 °C, and line pressure is roll self weight.
8. the preparation method for the wet process substrate non-woven fabrics of the MBR plate membrane of water process according to claim 4, feature
It is：The step d heats 210~232 °C of spreading metalling roll surface temperature, and roll line pressure is 70~90kg/cm, composite roll
Surface temperature is 110~120 °C, and hardness is 70~90 degree.
9. the preparation method for the wet process substrate non-woven fabrics of the MBR plate membrane of water process according to claim 4, feature
It is：The step e hot rolling thickness control：160~190 °C of metallic mirror surface roll surface temperature, compound rod surface temperature is 100
~120 °C, roll line pressure adjusts nonwoven thickness between 60~100kg/cm.
10. the preparation method for the wet process substrate non-woven fabrics of the MBR plate membrane of water process according to claim 4, special
Sign is：The hydrophilic pretreatment of step a raw material, step b diddle-net cause web, step c drying and processing, and step d hot melt is rolled over
Pressure, step e hot rolling thickness control, 6 steps of step f quality testing and winding are that continuous synchronization carries out.
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Application publication date: 20181123 |