CN105749624A - Polyamide filter material and production method thereof - Google Patents
Polyamide filter material and production method thereof Download PDFInfo
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- CN105749624A CN105749624A CN201610161022.5A CN201610161022A CN105749624A CN 105749624 A CN105749624 A CN 105749624A CN 201610161022 A CN201610161022 A CN 201610161022A CN 105749624 A CN105749624 A CN 105749624A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/566—Winding and joining, e.g. winding spirally for making tubular articles followed by compression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92514—Pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a polyamide filter material. The filter material adopts a hollow cylindrical structure produced through melt-blowing process treatment of a polyamide material and adhesion and winding of blown superfine fibers; the filter material adopts a loose structure and filter holes with different hole diameters are formed; the hole diameters of the filter holes sequentially and gradually decrease from the outer layer of the cylindrical structure to the inner layer. The characteristic that the polyamide material is resistant to corrosion by multiple chemical raw materials is used, melt-blowing process treatment is performed, the structure identical with that of a common polypropylene filter element is obtained, on the premise that oil and alcohol corrosion resistance of the material is guaranteed, the filter material has better filter precision, pollutant-holding capacity and circulation drag parameters, and the filter requirement of oils, chemical waste liquor and chemical waste gas is met.
Description
Technical field
The present invention relates to a kind of filtering material and preparation facilities thereof and preparation method, especially a kind of polyamide filter material for the filtration of oil product, chemical emission and waste liquid and preparation method thereof.
Background technology
Engine fuel is producing, is transporting and deposit and can produce and be mixed into a large amount of impurity in process.Clean fuel oil also can produce metal-oxide after storage a period of time, precipitate out the pollutant such as colloid, asphalitine.The fuel oil of severe contamination can cause that the abrasion at the positions such as electromotor injection system and combustor and carbon distribution generate so that fuel engines fuel consumption in use for some time increases, the hurried rising of exhaust emissions amount.Solution general at present is to install oil product filter on the engine, removes the impurity in fuel oil, colloid, asphalitine and moisture etc..Clean fuel oil can improve efficiency of combustion thus saving fuel oil, reduction discharge；Also can reduce electromotor heel and toe wear, increasing service life of engine, make electromotor slow down along with the trend extending oil consumption increase of the time of use.
The oil product filter of domestic more than 98% uses wood pulp filter paper, high accuracy composite filter paper or wire netting to be filter material at present, to reach to remove the purpose of impurity and moisture in oil product.The circulating resistance of high accuracy filter paper is big, water environment capacity is poor, service life is short；Though wood pulp paper and wire netting have the advantage that circulating resistance is little, but filtering accuracy is low, filter efficiency is poor.These several filter materials all can not meet the requirement that in industrial processes, oil product is filtered by equipment, causes the problems such as equipment failure rate height, low, the lost of life of operational efficiency.
Current material melt-blown process is widely used in the manufacture of polypropylene material for core.Melt-blown is exactly stretch polymeric material through thermal current after high temperature is extruded to form superfine cellosilk, and prepare into corresponding shape and structure, it is strong that polypropylene melt-blown filter material has water environment capacity, filtering accuracy advantages of higher, and it is prone to batch production, but it is currently only used for the filtration of air and water, this is because industrial oil generally all contains alkane, alkene, cycloalkane, aromatic hydrocarbon, polycyclic aromatic hydrocarbon and a small amount of sulfur, nitrogen compound etc., contact oil product can cause that polypropylene articles is dissolved corrosion for a long time, it is swelled into grume, lose filter capacity, therefore, polypropylene melt-blown filter material cannot be applied to industrial oil filtration art.
Further for containing the chemical waste liquid of macro-corrosion raw material, chemical emission, if adopting conventional polypropylene filter element, then equally exist filter material be corroded dissolving, lose the probability of filter capacity, therefore no matter it is the filtering perspective from industrial oil or chemical waste liquid and waste gas, it is badly in need of the melt-blown filter wanting a kind of special material to make through melt-blown process, and the advantage with conventional meltblown filter element, be capable of withstanding simultaneously by oil product, waste liquid, waste gas corrosion, and the chemical particle in medium, dust, mechanical admixture etc. can be filtered.
Application number be 200510040447.2 Chinese patent disclose " oil-water separating net of a kind of super-hydrophobic/super-oleophilic ", it is proposed to the thin film of and oleophylic hydrophobic at fabric web overlying lid layer, utilize the hydrophobic function of thin film, it is achieved the oil-water separation in oil product.This is the technical thought that current oil product filtration art is commonly used, namely adopts hydrophobicity filter material, is separated by water, and " dredging " aqueous of filter material can be more good from fuel oil, and its effect separating water is more good.But this film producing process of Problems existing is complicated, and other filtering function and index are not good, it is difficult to obtain practical popularization.
Summary of the invention
The problem to be solved in the present invention is to propose a kind of polyamide filter material made based on melt-blown process and manufacture method thereof, this filter material has the advantages such as the water environment capacity of melt-blown filter material is strong, filtering accuracy is high, circulating resistance is little, industrial chemicals is had stronger corrosion resistance, and in oil product filters, there is higher oil-water separation efficiency.
Technical scheme is as follows:
A kind of polyamide filter material, it is characterised in that described filter material is to adopt polyamide material to be processed by melt-blown process, and the superfine fibre silk of ejection is through bonding mutually and is wound around the hollow cylindrical structure made.
In above-mentioned polyamide filter material, filter material is open structure, forms the filter opening of different pore size；The size distribution mode of described filter opening is successively decrease gradually successively along tubular structure outer layer to internal layer pore size.
In above-mentioned polyamide filter material, filter material thickness is 0.5-30mm, and wherein the average pore size of cylinder portion outer layer filter opening is 10-100 μm, and the average pore size of cylinder portion internal layer filter opening is 1-50 μm, and the average diameter of meltblown fibers silk is 0.1-80 μm, and the porosity of filter material is more than 80%.
In above-mentioned polyamide filter material, filter material thickness is 5-20mm, and the average pore size of cylinder portion outer layer is 20-40 μm, the average pore size of cylinder portion internal layer is 10-20 μm, the average diameter range of meltblown fibers silk is 5-50 μm, and the porosity of filter material is more than 90%, and described filter material is used for fuel filter.
In above-mentioned polyamide filter material, filter material thickness is 5-20mm, the average pore size of cylinder portion outer layer is 40-80 μm, the average pore size of cylinder portion internal layer is 20-40 μm, the average diameter range of meltblown fibers silk is 5-50 μm, the porosity of filter material is more than 80%, and described filter material filters for air or industrial waste gas purifying.
In above-mentioned polyamide filter material, filter material thickness is 5-20mm, and the average pore size of cylinder portion outer layer is 20-40 μm, the average pore size of cylinder portion internal layer is 1-20 μm, the average diameter range of meltblown fibers silk is 5-50 μm, and the porosity of filter material is more than 80%, and described filter material is used for industrial wastes purification filtering.
In above-mentioned polyamide filter material, filter material thickness is 5-30mm, and the average pore size of cylinder portion outer layer is 80-100 μm, the average pore size of cylinder portion internal layer is 30-80 μm, the average diameter range of meltblown fibers silk is 5-50 μm, and the porosity of filter material is more than 90%, and described filter material is used for machine oil purification filtering.
In above-mentioned polyamide filter material, polyamide is PA6 and PA66.
In above-mentioned polyamide filter material, the medium of its filtration is oil product, chemical waste liquid or chemical emission.
In above-mentioned polyamide filter material, oil product includes fuel oil, machine oil or hydraulic oil.
The manufacture method of a kind of polyamide filter material, comprises the following steps:
[1] polyamide section being added extruder hopper, hopper heater is set as 40-50 DEG C, the baking material time is 4 hours；
[2] condition of spinning manifold temperature rises to 240-300 DEG C, and fast replacing device is warming up to 240 ± 10 DEG C, and extruder is warming up to 300 ± 10 DEG C, and polyamide raw materials is heated in an extruder after melting and is delivered to filter element, is assigned to manifold after described filter element filters out impurities；
[3] meltblown beam is forced into 0.05-0.07MPa, and temperature rises to 240-300 DEG C, and fused raw material is extruded through the aperture of meltblown beam, becomes meltblown fibers silk in the strong drawing-off of high-temperature high-speed airflow；The pressure 2MPa of extruder；
[4] mutually bond and be wrapped in the reception finite element rotation axle surface of rotation between meltblown fibers silk, ultimately form cylindric melt-blown filter material；By changing the reception speed and receiving angle receiving unit, it is achieved the structure that filter material successively decreases along tubular structure outer layer successively gradually to internal layer pore size；
[5] filter material is cut into the tubular filter material of appropriate length by cutter unit.
In the manufacture method of above-mentioned polyamide filter material, being additionally included in polyamide section the master batch being mixed in step [1], described master batch is one or more of calcium carbonate, Pulvis Talci, carbonic ester silane, Tissuemat E and stearic acid salt；The ratio of the section of described polyamide and master batch is 1:0.03.
In the manufacture method of above-mentioned polyamide filter material, master batch is particle diameter is 1-3mm.
The Advantageous Effects that the present invention has is as follows:
1, the present invention utilizes the feature that the resistant to many chemical raw material that polyamide material has corrodes, it is carried out melt-blown process process, obtain the structure the same with common polypropylene filter element, guarantee under the premise that material has the resistance to alcohol corrosion of oil resistant, there is preferably filtering accuracy, water environment capacity and circulating resistance parameter, meet the filtering requirement of oil product, chemical waste liquid and chemical emission.
2 it is known that polyamide is a kind of hydrophilic material, and according to the thinking in aforementioned background art, water wetted material is not to be suitable for the filtration of water in oil product, and main cause is it is non-hydrophobic material, it is difficult to realize the oil-water separation in oil product.The present invention proposes and a kind of utilizes meltblown polyamide material to make the scheme of filter material, filter element and filter, by controlling the structural parameters of filter material, achieve fuel oil or the filtration of lubrication wet goods oil product, under guaranteeing the premise that material has the resistance to alcohol corrosion of oil resistant, there is higher and oil and water separation capability, the program breaches tradition filter material can only select the restriction of hydrophobic material to meet oil-water separation index, the feature such as corrosion-resistant, highly reliable making full use of that polyamide material has in oil product, meets the filtering requirement of common oil product.
3, the present invention in melt-blown process by controlling the parameters such as the temperature of filametntary output aperture, melt-blown pressure, the temperature of extruder, the temperature of manifold and meltblown beam, melt-blown fibre diameter parameter is made to reach designing requirement, simultaneously by changing reception speed and the receiving angle receiving unit in melt blown process, control the aperture of the mean porosities on filter material and filter opening, filter opening is successively decreased gradually from outer layer to internal layer, is finally reached designing requirement.
4, the present invention is by the master batch additive that is mixed in cutting into slices at polyamide, substantially increases filametntary toughness and intensity, overcomes meltblown fibers silk fracture of wire, thickness is uneven, production efficiency is low problem.
Accompanying drawing explanation
Fig. 1 is the structural representation of the melt-blown filter material of the present invention；
Fig. 2 is the structural representation of melt-blown filter of the present invention；
Fig. 3 is the composite filter element structural representation that the present invention comprises filter paper and polyamide filter material；
Fig. 4 is the profile in F-F direction in Fig. 3；
Fig. 5 is the structural representation of device for melt blowing of the present invention；
Fig. 6 is meltblown beam operation principle schematic diagram of the present invention；
Fig. 7 is the sweating soldering device principle schematic of polyamide filter element of the present invention.
Accompanying drawing labelling is as follows: 60 compressing units；61 feeding units；62 right-hand member clamping units；63 right end caps；64 left end caps；65 left end clamping units；66 filter element bearings；67 heating mobile units；68 heating units；69 filter element parts；71 air compressors；72 extruders；73 filter elements；74 manifold；75 meltblown beam；76 receive unit；77 cutter units；81 air chamber；82 die head mainboards；83 hot plates；84 gas circuits；85 material roads；91 upper end covers；92 bottom end covers；93 melt-blown filter materials；94 oil-outs；95 melt-blown filter material internal layers；96 melt-blown filter material outer layers；97 skeletons；99 folded filter papers.
Detailed description of the invention
As it is shown in figure 1, the filter material of the present invention adopts the tubular structure made of polyamide melt-blown process, wherein the thickness of filter material i.e. wall thickness are 0.5-30mm, and height is determined according to different filter element yardsticks.Being dispersed with the filter opening successively decreased from the outer to the inner gradually in aperture on filter material, wherein the average pore size of cylinder portion outer layer is 10-100 μm, and the average pore size of cylinder portion internal layer is 1-50 μm, and the average diameter of meltblown fibers silk is 0.1-80 μm, and the porosity of filter material is more than 80%.
As in figure 2 it is shown, filter element includes melt-blown filter material 93, upper end cover 91 and bottom end cover 92, upper end cover 91 and bottom end cover 92 is connected in the two ends of polyamide filter material 93, skeleton is then arranged on inside filter material for pressure-bearing.Upper end cover 91 has oil outlet 94, and bottom end cover 92 is then sealed in the bottom of filter material melt-blown 93.Impurity is filtered through filter material body by filtered oil product from the outer layer of filter material, flows out then through oil outlet 94.As a kind of optimal way, upper end cover 91, bottom end cover 92 all adopt polyamide material, are integrated by hot plate welding technique welding with polyamide filter material, owing to the average void fraction of filter material is relatively big, therefore to control welding temperature and time in welding.
As shown in Figure 3 and Figure 4, as a kind of optimal way, outside the skeleton of filter element, tubular filter material be internally provided with the tubular folded filter paper 99 coaxial with filter material；Wherein polyamide filter material realizes filtering and emulsified water breakdown of emulsion, and folded filter paper 99 adopts existing conventional filter paper to make, and for further fine straining and oil-water separation, the two combination can improve filtering accuracy and oil-water separation rate further.
The present invention is by controlling the structural parameters of filter material, it is achieved that the filtration of fuel oil or lubrication wet goods oil product, has higher filtering accuracy, water environment capacity and oil and water separation capability.As a kind of optimal way, filter material thickness is 5-20mm, the average pore size of cylinder portion outer layer is 20-40 μm, the average pore size of cylinder portion internal layer is 10-20 μm, the average diameter of meltblown fibers silk is 5-50 μm, the porosity of filter material is more than 90%, and these parameters can further improve filtration index, optimizes performance.
Work principle of filter of the present invention is as follows: when oil product is exported by oil outlet through filter material by the outside of filter element again, Colophonium in oil product, dust and mechanical admixture are blocked and are adsorbed on filter material, and by higher mean porosities parameter, improve the carrying capacity to impurity；The setting of the filter opening successively decreased gradually to internal layer by outer layer in addition, stays the outer layer of filter material by the impurity of big particle diameter, and the impurity absorption of little particle diameter is in the inside of filter material.Its mechanism in oil product filters with high oil water separation function is described below:
Polyamide melt-blown filter materials is originally as hydrophilic oleophobic material, and its material itself has the hydrophilic of excellence, and the cellosilk of melt-blown formation is very thin, has been internally formed numerous capillary holes in the process being wound hollow tube-shape filter material.Result of study shows, in oil product, overwhelming majority water is to exist with the little water droplet of free state, and no matter the filter material of the present invention is the aperture in the capillary hole of filament diameter or the formation diameter that is respectively less than most little water droplet, microstructure is seen, the surface tension of oil product drop is much smaller than water droplet, so utilize surface tension that fine liquid particles is bigger and during by capillary hole with the mutual affine cohesion of water wetted material, it is aggregated into free water after making the emulsified water breakdown of emulsion in fuel oil, free water mutually collides and converges as larger-diameter water droplet, collect to rapid subsidence bottom filter element under gravity, finally discharged by blowoff valve.
Fig. 5 gives the manufacture device of polyamide filter material of the present invention, including air compressor 71, extruder 72, filter element 73, manifold 74, meltblown beam 75, receive unit 76 and cutter unit 77, air compressor 71 provides high-pressure air source for extruder 72, after filter element 73 is by contaminant filter, manifold 74 is entered after heating raw materials that extruder 72 adds is melted, manifold 74 side is provided with meltblown beam 75, fused raw material is extruded through the aperture of meltblown beam 75, and under high-temperature high-speed airflow effect melt-blown go out superfine fibre silk to receive unit 76, receive unit and cellosilk is rolled into tubular, receive unit 76 and be connected to cutter unit 77, realize the ends cutting of filter material.Receiving and be provided with rotating shaft on unit 76, meltblown fibers is repeatedly wound around on the rotary shaft and is formed long tubular element by traction continuously.Obtaining different fibre density, wall thickness and the differentiated aperture value of ectonexine by adjusting the parameter receiving unit, then cut unit 77 cuts off the melt-blown filter forming suitable dimension.
The effect of extruder 72 is the extruding of solid high polymer, aerofluxus, melted, mixing homogenizing, quantitatively exports high polymer melt under stationary temperature and pressure.Filter element 73 is used to the device that molten polymer is filtered, and has a circular groove, for placement of multiple layers drainage screen, it is achieved the contaminant filter in material inside it.The effect of manifold 74 is the melted chain rupture promoting polymer, and the flow path that material is in manifold is equal, absorbs heat energy equal, and finally measured pump continuous and quantitative extrusion is got to know.
Meltblown beam is illustrated as shown in Figure 6, supply and feed two parts it are divided into inside it, that expects road 85 both above and below has gas circuit 84, and between gas circuit and material road, have the angle of 60 °, die head mainboard 82 is internally provided with air chamber 81, it is provided with hot plate 83 between material road 85 and gas circuit 84, when two strands of airflow collisions form turbulent flow, promotes the molten polymer of material road 85 extrusion quickly to form fiber.Nylon meltblown fibers is received unit and receives the formation melt-blown filter material of tubular nylon, adjusts the reception speed receiving unit and makes the melt-blown tubular filter material of nylon depart from it；Cutter unit includes the buncher and the cutting knife that automatically control, and filter material is cut by the length according to setting.
The present invention preferably has the equipment of both-end meltblown beam, say, that two sides of manifold 74 are provided with meltblown beam 75 and the reception unit 76 matched and cutter unit 77, and two meltblown beam automatically control respectively, substantially increase production efficiency.
The manufacturing step of the polyamide filter material of the present invention is as follows:
[1] polyamide section being added extruder hopper, hopper heater is set as 40-50 DEG C, the baking material time is 4 hours；
[2] condition of spinning manifold temperature rises to 240-300 DEG C, and fast replacing device is warming up to 240 ± 10 DEG C, and extruder is warming up to 300 ± 10 DEG C.Polyamide raw materials is heated in an extruder after melting and is delivered to filter element, is assigned to manifold after described filter element filters out impurities；
[3] meltblown beam is forced into 0.05-0.07MPa, and temperature rises to 240-300 DEG C, and fused raw material is extruded through the aperture of meltblown beam, becomes melt-blown micro fibre in the strong drawing-off of high-temperature high-speed airflow, and wherein the pressure of extruder is 2MPa；
[4] meltblown fibers is received unit and is rolled into cylindric melt-blown filter material, and by changing the reception speed and receiving angle receiving unit, ensures the porosity parameter of filter material, and successively decrease from the outer to the inner gradually in the aperture realizing filter opening；
[5] filter material is cut into the tubular filter material of appropriate length by cutter unit.
Wherein when extruder pressure adjust 2MPa, fused raw material can be extruded into 0.1-80 μm thread.Receive device and move horizontally the reception long tubular element of formation, and size cuts off molding as requested.
As required, step [1] is additionally included in polyamide section the master batch being mixed into, described master batch includes one or more in filler, coupling agent or dispersant, wherein filler includes calcium carbonate, Pulvis Talci etc., coupling agent such as carbonic ester silane etc., dispersant such as Tissuemat E, stearic acid salt etc..Wherein the particle diameter of master batch is 1-3m, and polyamide section and the ratio adding master batch are 1:0.03.
Conventional bowl is to be undertaken bonding by filter material by epoxide-resin glue and two end caps and folded filter paper, is soluble in the organic solvents such as ethanol due to epoxy resin, limits the range of application of filter element；The corrosion of the corrosive impurities such as filter material and filter paper connector place are highly susceptible in industrial oil water frequently with fixing sheet metal in addition, acid, causes the secondary pollution to industrial oil.The frame of filter element of the present invention, upper end cover and bottom end cover all adopt polyamide to make, take full advantage of the corrosion resistance characteristic of polyamide material, it is to avoid the existence of the problems referred to above.
As shown in Figure 7, the sweating soldering device of the polyamide filter element of the present invention includes filter element bearing 66, left end clamping unit 65, right-hand member clamping unit 62, compressing unit 60, heating unit 68 and control unit, wherein filter element part 69 includes polyamide filter material, left end cap and right end cap, filter material is placed on filter element bearing 66, being fixed by filter material by compressing unit 60, left end cap and right end cap are individually positioned on left end clamping unit 65 and right-hand member clamping unit 62.Heating unit 68 drives in control unit and is moved to left and right end cap same level position, left end cap 64 and right end cap 63 inner surface are heated to molten condition, control unit drives cylinder, heating unit is removed, simultaneously left end clamping unit 65 and right-hand member clamping unit 62 move along the axial direction of filter element, make left end cap 64 and right end cap 63 be close to the two ends of filter material, bond rapidly, after cooling, be cured as one.Wherein heating unit 68 is the heating face of loop configuration；Filter element bearing is V-groove structure.
The sweat soldering method of above-mentioned polyamide filter element, comprises the following steps:
[1] filter material is placed on filter element bearing, compressing unit filter material is fixed；
[2] left end cap and right end cap are individually positioned on left end clamping unit and right-hand member clamping unit, and heating unit is to left end cap, the heating of right end cap inner surface；Heating-up temperature 280-300 DEG C, the time is 2 minutes, makes left end cap, right end cap inner surface reach molten condition；
[3] left end cap, right end cap move along filter element axis direction under clamping unit promotes, and are close to the two ends of filter material to two end caps；
[4] filter material and end cap bond rapidly, solidify to form one after cooling.
According to the filter element universal test method in oil product cleaner industry, the parameter of filter element having been detected, concrete detection method and condition are as follows:
(1) pollutant holding capability:
It is measured by the amount being trapped after cleaner under certain time, flow with certain standard pollutant, refers to the assay method particle counting of international standard ISO19438:2003 automobile engine diesel fuel filter and gasoline filter filtering efficiency and impurity storage capacity.
(2) original circulating resistance
Measuring cleaner when nominal volume flow, test oil is by the differential static pressure of cleaner.Refer to machinery industry standard JBT5239.4-2011 diesel filter for diesel engine the 4th part: test method 6.4 original resistance is tested；Or see automobile industry standard QCT772-2006 automobile diesel fuel filter test method；Or see the fuel filter part 1 of ISO4020-2001 road vehicle Diesel engine: test method.
(3) oil-water separation rate
Measure the percentage ratio that moisture standard oil is reduced by the water concentration before and after cleaner, refer to the appraisal procedure of international standard ISOTS163322006 diesel engine fuel oil cleaner oil-water separation usefulness or according to SAEJ1839 (97) coarse microdroplet water/fuel separation test code.
(4) filtering accuracy
According to the standard solid composition granule size intercepted by cleaner under nominal volume flow and quantitative measurement cleaner filtering accuracy and filter efficiency, refer to the assay method particle counting of international standard ISO19438:2003 automobile engine diesel fuel filter and gasoline filter filtering efficiency and impurity storage capacity or the diesel fuel filter of the domestic combustion engine of ISO/TR13353-2003, by original effect of calculating particles, vitality capacity and gravity effect.
(5) aperture and porosity
Immersion liquid is only allowed for access porous body when applying external force, when continuous supercharging, and when entering hydrargyrum volume as external pressure function, can obtain entering the hydrargyrum volume evacuated in sample under external force, thus recording the pore-size distribution of sample.Mensuration mode can adopt continuous supercharging mode, it is possible to adopts step-by-step pressurization mode, after namely certain interval of time reaches balance, then measures into hydrargyrum volume.Refer to GBT21650.1-2011/ISO15901:2005 mercury injection method and gas determination of adsorption method solid material pore-size distribution and porosity part 1: mercury injection method
Several group specific embodiments are given below:
Embodiment 1: material is PA6；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 10mm, the average pore size of filter core cylinder volume surrounding is 10 μm, the average pore size of filter element barrel inner is 1 μm, and the average diameter of meltblown fibers silk is 0.1 μm, porosity 80.2%；Filtering oil product type is gasoline；It is applied to the filter effect of gasoline filter: the filter efficiency to 5-10 μm of granule is 99.09%；Water environment capacity is 60.11g, and during nominal volume flow 10L/min, original circulating resistance 10kpa, oil-water separation rate is 98.99%.
Embodiment 2: material is PA6；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 10mm, the average pore size of filter core cylinder volume surrounding is 100 μm, the average pore size of filter element barrel inner is 50 μm, and the average diameter of meltblown fibers silk is 80 μm, porosity 91.2%；Filtering oil product type is lubricating oil；It is applied to the filter effect of oil filter: the filter efficiency to 5-10 μm of granule is 92.01%；Water environment capacity is 122.01g, and during nominal volume flow 10L/min, original circulating resistance 12.01kpa, oil-water separation rate is 91.88%.
Embodiment 3: material is PA6；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 10mm, the average pore size of filter core cylinder volume surrounding is 100 μm, the average pore size of filter element barrel inner is 30 μm, and the average diameter of meltblown fibers silk is 25 μm, porosity 90.2%；Filtering oil product type is lubricating oil；It is applied to the filter effect of oil filter: the filter efficiency to 5-10 μm of granule is 92.05%；Water environment capacity is 101.88g, and during nominal volume flow 10L/min, original circulating resistance 12.35kpa, oil-water separation rate is 90.53%.
Embodiment 4: material is PA6；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 5mm, and the average pore size of filter core cylinder volume surrounding is 20 μm, and the average pore size of filter element barrel inner is 1 μm, and the average diameter of meltblown fibers silk is 50 μm, porosity 81.1%；Filtering oil product type is gasoline；It is applied to the filter effect of gasoline filter: the filter efficiency to 5-10 μm of granule is 98.75%；Water environment capacity is 84.74g, and during nominal volume flow 10L/min, original circulating resistance 8.01kpa, oil-water separation rate is 95.13%.
Embodiment 5: material is PA66；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 20mm, and the average pore size of filter core cylinder volume surrounding is 100 μm, and the average pore size of filter element barrel inner is 1 μm, and the average diameter of meltblown fibers silk is 80 μm, porosity 86%；Filtering oil product type is gasoline；It is applied to the filter effect of gasoline filter: the filter efficiency to 5-10 μm of granule is 95.94%；Water environment capacity is 78.63g, and during nominal volume flow 10L/min, original circulating resistance 9.19kpa, oil-water separation rate is 92.14%.
Embodiment 6: material is PA6；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 10mm, the average pore size of filter core cylinder volume surrounding is 40 μm, the average pore size of filter element barrel inner is 10 μm, and the average diameter of meltblown fibers silk is 10 μm, porosity 84.1%；Filtering oil product type is diesel oil；It is applied to the filter effect of diesel fuel filter: the filter efficiency to 5-10 μm of granule is 95.19%；Water environment capacity is 108.46g, and during nominal volume flow 10L/min, original circulating resistance 7.27kpa, oil-water separation rate is 95%.
Embodiment 7: material is PA66；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 10mm, the average pore size of filter core cylinder volume surrounding is 100 μm, the average pore size of filter element barrel inner is 20 μm, and the average diameter of meltblown fibers silk is 15 μm, porosity 90.6%；Filtering oil product type is diesel oil；It is applied to the filter effect of diesel fuel filter: the filter efficiency to 5-10 μm of granule is 92.12%；Water environment capacity is 112.85g, and during nominal volume flow 10L/min, original circulating resistance 6.85kpa, oil-water separation rate is 95.66%.
Embodiment 8: material is PA66；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 10mm, the average pore size of filter core cylinder volume surrounding is 50 μm, the average pore size of filter element barrel inner is 20 μm, and the average diameter of meltblown fibers silk is 5 μm, porosity 83.6%；Filtering oil product type is diesel oil；It is applied to the filter effect of diesel fuel filter: the filter efficiency to 5-10 μm of granule is 96.12%；Water environment capacity is 88.3g, and during nominal volume flow 10L/min, original circulating resistance 7.77kpa, oil-water separation rate is 97.14%.
Embodiment 9: material is PA66；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 20mm, the average pore size of filter core cylinder volume surrounding is 100 μm, the average pore size of filter element barrel inner is 50 μm, and the average diameter of meltblown fibers silk is 25 μm, porosity 92%；Filtration types is chemical industry solutions；It is applied to the effect of triethylene glycol. solution purification filtering: the filter efficiency to 5-10 μm of granule is 95%.
Embodiment 10: material is PA66；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 20mm, and the average pore size of filter core cylinder volume surrounding is 60 μm, and the average pore size of filter element barrel inner is 40 μm, and the average diameter of meltblown fibers silk is 40 μm, porosity 90%；Filtration types is air；It is applied to the filter effect of heavy-duty engine air filter: the filter efficiency to 2.5 μm of granules is 99%.
Embodiment 11: material is PA66；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 20mm, and the average pore size of filter core cylinder volume surrounding is 20 μm, and the average pore size of filter element barrel inner is 5 μm, and the average diameter of meltblown fibers silk is 25 μm, porosity 86%；Filtration types is industrial wastewater；It is applied to the filter effect of device for processing papermaking wastewater: the filter efficiency to 5-10 μm of granule is 95%.
Embodiment 12: material is PA66；Filter material barrel lenght is 200mm, and filter material cylinder external diameter is 100mm, and the thickness of filter material cylinder is 20mm, and the average pore size of filter core cylinder volume surrounding is 80 μm, and the average pore size of filter element barrel inner is 50 μm, and the average diameter of meltblown fibers silk is 30 μm, porosity 86%；Filtration types is industrial waste gas；It is applied to the filter effect of enamel-covered wire waste gas filter: the filter efficiency to 5 μm of granules is 95%.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; it cannot be assumed that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention and be determined scope of patent protection by submitted claims.
Claims (10)
1. a polyamide filter material, it is characterised in that: described filter material be adopt polyamide material to be processed by melt-blown process, melt-blown go out superfine fibre silk through mutually bonding and be wound around the hollow cylindrical structure made.
2. polyamide filter material according to claim 1, it is characterised in that: described filter material is the open structure comprising some different pore size filter openings, and the size distribution mode of described filter opening is for successively decrease gradually successively along tubular structure outer layer to internal layer pore size.
3. polyamide filter material according to claim 1, it is characterized in that: described filter material thickness is 0.5-30mm, wherein the average pore size of cylinder portion outer layer filter opening is 10-100 μm, the average pore size of cylinder portion internal layer filter opening is 1-50 μm, the average diameter of meltblown fibers silk is 0.1-80 μm, and the porosity of filter material is more than 80%.
4. polyamide filter material according to claim 3, it is characterized in that: described filter material thickness is 5-20mm, the average pore size of cylinder portion outer layer is 20-40 μm, the average pore size of cylinder portion internal layer is 10-20 μm, the average diameter range of meltblown fibers silk is 5-50 μm, the porosity of filter material is more than 90%, and described filter material is used for fuel filter.
5. polyamide filter material according to claim 3, it is characterized in that: described filter material thickness is 5-20mm, the average pore size of cylinder portion outer layer is 40-80 μm, the average pore size of cylinder portion internal layer is 20-40 μm, the average diameter range of meltblown fibers silk is 5-50 μm, the porosity of filter material is more than 80%, and described filter material filters for air or industrial waste gas purifying.
6. polyamide filter material according to claim 3, it is characterized in that: described filter material thickness is 5-20mm, the average pore size of cylinder portion outer layer is 20-40 μm, the average pore size of cylinder portion internal layer is 1-20 μm, the average diameter range of meltblown fibers silk is 5-50 μm, the porosity of filter material is more than 80%, and described filter material is used for industrial wastes purification filtering.
7. polyamide filter material according to claim 3, it is characterized in that: described filter material thickness is 5-30mm, the average pore size of cylinder portion outer layer is 80-100 μm, the average pore size of cylinder portion internal layer is 30-80 μm, the average diameter range of meltblown fibers silk is 5-50 μm, the porosity of filter material is more than 90%, and described filter material is used for machine oil purification filtering.
8. according to one of any described polyamide filter material of claim 1-7, it is characterised in that: described polyamide is PA6 and PA66.
9. the manufacture method of a polyamide filter material, it is characterised in that comprise the following steps:
[1] polyamide section being added extruder hopper, hopper heater is set as 40-50 DEG C, the baking material time is 4 hours；
[2] condition of spinning manifold temperature rises to 240-300 DEG C, and fast replacing device is warming up to 240 ± 10 DEG C, and extruder is warming up to 300 ± 10 DEG C, and polyamide raw materials is heated in an extruder after melting and is delivered to filter element, is assigned to manifold after described filter element filters out impurities；
[3] meltblown beam is forced into 0.05-0.07MPa, and temperature rises to 240-300 DEG C, and fused raw material is extruded through the aperture of meltblown beam, becomes meltblown fibers silk in the strong drawing-off of high-temperature high-speed airflow；The pressure 2MPa of extruder；
[4] mutually bond and be wrapped in the reception finite element rotation axle surface of rotation between meltblown fibers silk, ultimately form cylindric melt-blown filter material；By changing the reception speed and receiving angle receiving unit, it is achieved the structure that filter material successively decreases along tubular structure outer layer successively gradually to internal layer pore size；
[5] filter material is cut into the tubular filter material of appropriate length by cutter unit.
10. the manufacture method of polyamide filter material according to claim 9, it is characterized in that, being additionally included in polyamide section the master batch being mixed in described step [1], described master batch is one or more of calcium carbonate, Pulvis Talci, carbonic ester silane, Tissuemat E and stearic acid salt；The ratio of the section of described polyamide and master batch is 1:0.03.
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