CN100378262C - Forming method of interweaving composite filtering material using aerodynamic force and structure thereof - Google Patents
Forming method of interweaving composite filtering material using aerodynamic force and structure thereof Download PDFInfo
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- CN100378262C CN100378262C CNB031445233A CN03144523A CN100378262C CN 100378262 C CN100378262 C CN 100378262C CN B031445233 A CNB031445233 A CN B031445233A CN 03144523 A CN03144523 A CN 03144523A CN 100378262 C CN100378262 C CN 100378262C
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Abstract
The present invention relates to a forming method for interweaving compound filtering materials by gas dynamic force and a structure, which has the technical scheme that short fibers and functional particles are respectively delivered to a compound gas injection device by gas flow, and feeding gas flow of the short fibers and the functional particles simultaneously enter a diffusion mixing transmission area, and thus, the mixed feeding gas flow is diffused from top to bottom and flows across a flow guiding device; the gas flow is stably transferred to a multi-layer compound shaping area in the lower position; the short fibers and the particles are orderly absorbed and accumulated on a movable shaping net by a gas absorption device arranged below the multi-layer compound shaping area, and multiple layers of filtering materials with the sparse to dense layer structure; the filtering materials are heated and are shaped, and the filtering materials are cooled and are formed. Thus, the formed filtering materials comprise a multi-layer interwoven compound structure provided with a protective layer at the bottom, an adsorption layer in the middle and a flow equalization layer in the upper position.
Description
Technical field
The present invention relates to a kind of interweave forming method of Compound filtering material of aerodynamic force that utilizes.
Background technology
In the Application Areas of chemical contamination protection filter material, existing many mature technologies, wherein with value-added tax function particulate in the fiber web, as: activated carbon is the main flow of technology.Existing many invention documents are set forth the production technology of this type of filter material, as: US Patent Nos.4,795,668, Krueger etal.4,868,032 is disclosed 5,486 by Ei an et al., 410 fabric structures that disclosed by Groeger et al. contain relevant technology such as fixed functional particle shape material, it all is the procedure for producing that is applied to absorption filtering material mainly, is sticker with the fiber, and functional particle shape material is adhered in the fibre structure, and then filtered air or liquid, the toxic pollutant matter of passing through is adsorbed by functional particle reach the purpose that protection is filtered.
In the prior art, utilize meltblown (Melt-Blown) to become the net person, again with functional particle shape material, as: activated carbon, adding makes it to be adhered in the melt-blown web structure in processing procedure.So the filter material impedance (pressure drop) that the kind mode produces is higher, can't effectively be applied to the production of high fraction of particle filter material.And the melt-blown fiber is tiny, and the even and poor stability of web structure easily causes the displacement of functional particle shape material when following process and application, even the loss that comes off.
And the US.5 that is delivered by Groeger et al., 486,410 patents, wherein the stereochemical structure that becomes with the composite fibre type is a carrier, functional particle shape material is fixed in the fibroreticulate hole, utilize follow-up in layer coinciding to reach the purpose of high particulate content again, increase the stability of functional particle shape material in filter medium structure, be unlikely the loss that comes off in the following process application, and can produce the filter material of the functional particle shape material of high-load, as: when activated carbon protects in chemisorbed, the invisible lengthening of Use Limitation.
Yet with fibroreticulate stereochemical structure is carrier, and again with functional particle shape material adhesion or be fixed in the structure, though can reach certain functional, because of being subject to the set kenel of carrier, its structure can only present with single fixing kenel.And the raising of functional particle shape content of material, though help the lifting in service life, little to the help of the absorption of essence or filter efficiency.
In addition, prior art is mechanically fiber to be made space network earlier, utilize interfibrous hole space to place particulate again, in this process, stereoscopic shape difference because of functional particle shape material, big or small and interfibrous hole size is also inequality, the density uniformity of desiring control structure is more difficult, therefore tend to cause the situation of many hole non-functional particulates fillings, and then cause air-flow or liquid by the time resistance minimum therefore located, thereby cause runner effect (channeling effect).Relatively, polluting the source molecule can't be by the phenomenon of functional particle shape material capture.Therefore, density of texture is inhomogeneous also to be the factor that causes efficient not good, especially when layer and stacking closing, because fibre structure can't bear the weight of particulate, and makes structural breakdown, produces the defective of density of texture especially, causes the filter material bad.
Simultaneously, desiring controlling fiber thickness and particulate face shaping size, reach suitable combination, and density of texture is even, is part that various technology does not reach in the past.Because be the kenel that carrier has just limited its structure with the fiber stereochemical structure earlier, can't in processing procedure, control its variability.
Therefore, at functionality filter medium, as: the adsorptivity filter material, in fiber construct except adding functional particle shape material, also must take into account the life-span of adsorption efficiency and use, therefore outside the stability of structure, must control to the variability of structure, as: the combining structure bulk density uniformity of fibre fineness and particulate face shaping size and create non-directional runner, increase holdup time and then the increase probability that with functional materials contact of pollution sources in filter material, so could promote the function of filter material, efficient reach the purpose of effective control chemical contamination, and Application Areas is also more extensive.
Summary of the invention
In order to overcome the above-mentioned shortcoming that existing chemical contamination protection filter material and manufacture method thereof exist, the invention provides a kind of interweave forming method of Compound filtering material of aerodynamic force that utilizes, its main purpose is to be main key with aerodynamic force, and it is auxilliary utilizing the special thermal treatment mode again.Reaching with extremely short fiber (short-cutfiber) is that basic material and functional particle shape material (as: activated carbon, potassinm permanganate impregnated alumina, chemisorbed macromolecule etc.) are basic material, utilize stable air-flow simultaneously dispersing and mixing, interweave, composite molding, and the aerodynamic force that makes the chemical protection filter material of the sheet non-woven kenel composite forming technology that interweaves.
The purpose again that the present invention reaches, then based on aerodynamic force, can be simultaneously with the compound accumulation that interweaves of fiber and particulate, but not with the fiberizing net be the dispersion of precursor body (precursor) material and bulk density because of steady air flow so, can reach very effect of uniform, and two materials are interweaved fixing, therefore, structure stability height, and utilize the air-flow dispersing and mixing, transmit, pile up moulding at last, the mixed proportion of two kinds of materials of control, and particulate had both made by low content and had been changed to high-load, all in same time composite molding, need not utilize the layering mode of coinciding to reach, and the bulk density uniformity is still very good, can not cause any structure defective.
The another purpose that the present invention reaches is during with the moulding of air-flow power, because the variation that air communication is crossed resistance, the three-decker that single filter material is formed simultaneously, by thin and close, and can control the mutual ratio of three-decker simultaneously, to reach best gas-flow resistance and chemisorbed efficient.The variation of fibre fineness is selected to cooperatively interact with the size of suitable particulate, utilize the moulding of air-flow power also simultaneously can control gas-flow resistance and stagnation (Residence Time) time, relatively increase efficient, therefore quite high to the control of structural change factor, quality controlled also good.
Another purpose that the present invention reaches is to utilize interweave filter material after the composite molding of air-flow power, and packed structures is even, and the moulding air communication is crossed the resistance homogeneous, and promptly the probability by fiber surface and functional particle shape material surface is even.But at the adsorptivity filter material, as: the activated carbon filter material, when the pollution sources air communication out-of-date, if it is out-of-date the closer to adsorbent (activated carbon) surface, then the chemical contamination molecule be captured absorption probability relatively improve, after this moulding of the present invention, the heat treatment in addition of filter material after utilizing the special thermal treatment technology with moulding, can make the adhesion of fiber surface fusion and functional particle shape material surface, also adhesion mutually between the fiber collection surface, so the filter medium structure intensity after the heat treatment improves the structure stability relatively and also improves.Fiber also shrinks when hot melt on the other hand, fiber assembly interface hole diminishes because of the contraction densification virtually, and fiber assembly and particulate interface, due to steric hindrance between particulate, can't move to shrink and cause expansion of pores, and the specific runner of formation gas stream of pollution, and because of filter medium structure is that stereochemical structure formed runner in three-dimensional space is the irregular route of non-rectilinear, thus, the chemical contamination molecule is mainly passed through by functional particle shape material surface, and contact probability increases, and the holdup time in filter medium structure increases, thereby increase the seizure adsorption time, whole efficient is significantly promoted.
The present invention utilizes the interweave technical scheme that forming method adopted of Compound filtering material of aerodynamic force to be:
A kind of interweave forming method of Compound filtering material of aerodynamic force that utilizes is characterized in that its step is as follows:
(a) utilize air-flow that staple fibre and functional particle material are delivered to a composite gas air-jet device respectively, and the feeding air-flow of particle matter is to be located in the middle of the composite gas air-jet device, and the feeding air-flow that makes the two enters diffusion mixing transmission district simultaneously, mixing feeding air-flow drive staple fibre and particle matter are from top to bottom spread, and the guiding device of flowing through, make steady air current be sent to the MULTILAYER COMPOSITE shaping area of below;
(b) utilize the getter device of being located at MULTILAYER COMPOSITE shaping area below, staple fibre and particle matter are adsorbed on the forming web that is deposited in a motion in regular turn, and adjust the inspiratory capacity of getter device on demand, make it and mix the feeding air-flow and reach balance, can on the forming web of motion, form the filter material of multilayer by thin and close gradually layer structure;
(c) filter material of aforementioned moulding is sent into the heat treatment shaping area, with thermal source heating, and with heating and temperature control between 120 ℃～180 ℃;
(d) the aforementioned filter material that adds HEAT SETTING is sent into the cooling zone.
Aforesaid the interweave forming method of Compound filtering material of aerodynamic force that utilizes, wherein the functional particle material is activated carbon, potassinm permanganate impregnated alumina or chemisorbed polymer substance.
Aforesaid the interweave forming method of Compound filtering material of aerodynamic force that utilizes, wherein diffusion mixes and transmits the district and be downward opening mixing casing, and set guiding device is to be made of several pieces adjustable type deflectors in it.
Aforesaid the interweave forming method of Compound filtering material of aerodynamic force that utilizes, wherein the heat treatment shaping area continues air-breathing in addition below filter material with a getter device.
Aforesaid the interweave forming method of Compound filtering material of aerodynamic force that utilizes, wherein the cooling zone continue with a getter device during in cooling below the filter material down air-breathing.
Can learn thus, utilize technology of the present invention, controlled fairly good to functionality filter medium fine structure (microstructure), and variability can meet widely, and Application Areas, quality, performance, efficient more are better than general product, and oneself reaches the stage of batch process this technology, and the technology of the present invention can be polluted for the Environmental Chemistry that is on the rise, and makes contributions in preventing and controlling.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the process block diagram of the invention process step.
Fig. 2 is a processing procedure schematic diagram of the present invention.
Fig. 3 is the interweave schematic diagram of composite molding of filter material of the present invention.
Fig. 4 is the preceding structural representation of adsorption layer heat treatment of filter material of the present invention.
Fig. 5 is the structural representation after the adsorption layer heat treatment of filter material of the present invention.
Fig. 6 is the enlarged diagram of structure shown in Figure 4.
Fig. 7 is the enlarged diagram of structure shown in Figure 5.
The specific embodiment
As shown in Figure 1 and Figure 2, step of the invention process is to include:
(a) utilize air-flow that staple fibre 1 and functional particle material 2 are delivered to a composite gas air-jet device 3 respectively, and the feeding air-flow of particle matter 2 is to be located in the middle of the composite gas air-jet device 3, air-jet device 3 its functions herein are just as air-jet device, but the non-circle that is limited to of its shape, its preferred embodiment is to be a rectangle body, make air nozzle become long and narrow state, can make the feeding air-flow of the two enter diffusion mixing transmission district 4 simultaneously, mixing feeding air-flow 41 drive staple fibres and particle matter are from top to bottom spread, and the guiding device 42 of flowing through, make steady air current be sent to the MULTILAYER COMPOSITE shaping area 5 of below;
(b) utilize the getter device 51 of being located at MULTILAYER COMPOSITE shaping area 5 belows, staple fibre 1 and particle matter 2 are adsorbed on the forming web 52 that is deposited in a motion in regular turn, and adjust the inspiratory capacity of getter device 51 on demand, make it and mix feeding air-flow 41 and reach balance, can on the forming web 52 of motion, form three layers of filter material 8 by thin and close gradually layer structure;
(c) filter material 8 of aforementioned moulding is sent into heat treatment shaping area 6, with thermal source 61 by top heating, and with heating and temperature control between 120 ℃～180 ℃; This moment can be below filter material 8 continue with a getter device 62 in addition air-breathing;
When (d) the aforementioned filter material 8 that adds HEAT SETTING being sent into cooling zone 7, can when cooling, continue down air-breathing with a getter device 71.
Again, aforesaid functional particle material 2 can be materials such as activated carbon, potassinm permanganate impregnated alumina or chemisorbed macromolecule.
Moreover it is downward opening box container 43 that aforesaid diffusion mixes transmission district 4, and set guiding device 42 is to be made of several pieces deflectors in it.
By above-mentioned technological means, the feeding air-flow 11 of staple fibre 1 is through composite gas air-jet device 3, feeding air-flow 21 with functional particle material 2 confluxes herein, and functional particle material 2 can utilize a certain amount of feeding system, quantitatively after the feeding, utilization feeding air-flow 21 enters composite gas air-jet device 3, and then makes the mixing feeding air-flow 41 of two kinds of materials enter diffusion mixing transmission district 4 simultaneously.Because the fluid area increased when air-flow left air-jet device, cause turbulent flow (turbulence) herein, and then make staple fibre 1 and functional particle material 2 mutually counterdiffusion mix, utilize special guiding device 42 in regional Lower Half thereupon, make the air-flow 41 stable MULTILAYER COMPOSITE shaping areas 5 that are sent to.
And mix transmission district 4 in diffusion, because the factor of composite gas air-jet device 3, can cause three flow area of obviously distinguishing, as shown in Figure 3, a left side, right both sides A1, A3 is mainly zone of fiber, middle A2 then mixes the zone of containing for fiber with activated carbon, this phenomenon is when subsequently moulding, promptly cause and significantly adhere to structure separately, the outlet of this composite gas air-jet device 3 is designed to and can adjusts, therefore can control three region area A1 simultaneously, A2, mutual ratio between A3, and then the section structure of change filter material, in the future visual demand adjustment air-jet device reaches and meets required filter medium structure.
When mixed airflow promptly carries out molding manufacture procedure through after the guiding device 42, in this stage mainly is to utilize getter device 51 staple fibre 1 and particle matter 2 to be deposited on the forming web 52 of a motion, and forming web 52 is to utilize transport 53 that it is moved forward, and getter device 51 can be adjusted inspiratory capacity and feeding air-flow 41 reaches balance, promptly can not cause gas velocity poor in the forming surface both sides, as the inspiratory capacity deficiency, feed then that air-flow 41 can dispel staple fibre 1 and functional particle material 2 on the contrary and can't moulding, excessive as inspiratory capacity, then can influence diffusion and mix the transfer rate that transmits in the district 4, easily make two kinds of still unmixed even rapid shapings that interweave of material, destroy the structural homogeneity of filter material, therefore when moulding, the adjustment of getter device 51 is indispensable.When moulding because three flow area A1, A2, A3 that diffusion forms when mixing, in this simultaneously on forming web 52 during moulding, then can form the three phases moulding, as shown in Figure 3, Phase I is that bottom fiber assembles accumulation, because forming web 52 is the continuity motion, therefore with enter Phase, be the accumulation that interweaves of staple fibre 1 and particle matter 2, the fiber assembly of final stage III is piled up thereon again, begins to take shape the functionality filter medium of three-decker.
When moulding, three phases all carries out in the same time, and feeding air-flow 41 mixes staple fibre and is transported on the forming web 52 with particle matter 2, utilizes getter device 51 will feed air-flow 41 eliminatings again, whole process air-flow all operates under a stable state, and steady air current is by the shaped structures body.And with the main key of aerodynamic force moulding promptly in this control in stage, preliminary filter material 8 after the moulding, its section structure as shown in Figure 3, filter material 8 presents tangible three-layer stereo structure, it includes:
One overcoat 81 is the bottoms that are positioned at the moulding filter material, is the main composition thing with staple fibre 1, and presents the comparatively dense stacking states;
One adsorption layer 82, be to be positioned at aforementioned overcoat top, with functional particle material 2 is main composition, and evenly interweave mutually with staple fibre and to be piled into stereochemical structure, wherein, the bulk density of functional particle material is thinner, in addition, the void density that adds the staple fibre aggregate after the HEAT SETTING presents finer and close state, makes the interface between staple fibre and functional particle material surface form non-rectilinear air-flow channel 84;
One equal fluid layer 83 is to be positioned at aforementioned adsorption layer 82 tops, is the main composition thing with staple fibre 1, and presents the state than fluff packing.
This hierarchy is mentioned in the above description, be to transmit three shunting zone A1 of district's 4 formation because of staple fibre 1 mixes in diffusion with particle matter 2, A2, A3 causes, when the mixing feeding air-flow 41 and pile up moulding simultaneously of staple fibre 1 and particle matter 2, the pars fibrosa I on the left side can pile up earlier and take shape on the forming web 52, then interweave accumulation thereon at forming web 52 zone line II staple fibres and particle matter 2 thereon, because of can preventing that particle matter 2 from being taken away by air-flow at this moment, the in type fiber web aggregate in bottom comes off, therefore staple fibre 1 and particle matter 2 interweave and mix aggregate and can evenly pile up moulding, be delivered to the right forming area III at last, fiber is piled up the top that takes shape in filter material again, finishes the air forming stage at this.
In this stage, the present invention mainly utilizes the aerodynamic force moulding, not only can reach staple fibre 1 and particle matter 2 and pile up the purpose of the moulding that interweaves simultaneously, and cause filter material 8 to have three layers stereochemical structure, and the bulk density of this three-decker also produces by thin and close gradually layer effect, as shown in Figure 3, when formative stage I, only there is the extremely short fiber 1 that disperses in feeding air-flow 41 in shunting zone A1, and pile up at first and be molded on the forming web 52, ulking thickness is thin, thus air-flow this zone to pass through flow velocity high relatively, can make staple fibre bulk density height, compact structure, and the hole between staple fibre is relatively little, in addition, the stereochemical structure of staple fibre aggregate is also even because of stablizing of air-flow, forms overcoat 81 structures in the filter material bottom.Along with staple fibre and particle matter interweave when being piled up on the overcoat 81, because ulking thickness increases gradually, air-flow velocity reduces in this structure relatively, and staple fibre 1 simultaneously with particle matter 2 accumulation that evenly interweaves mutually, stereoscopic shape difference because of two materials, therefore cause composite construction density to come thinly than the pure fiber assembly density of texture of overcoat 81, and form filter material 8 middle main adsorption function zones, promptly adsorption layer 82.And aerodynamic force moulding meeting makes the accumulation that interweaves simultaneously of staple fibre and particle matter, and stream is filled out each other, makes density of texture even, and both divide bulk density also even, can not produce the situation of fault of construction hole.At this moment, the apparent thickness of whole filter material increases gradually, therefore the resistance to air-flow also increases relatively, staple fibre is carried moulding be piled up in absorption in the right of shaping area III staple fibre feeding air-flow 41 at shunting zone A3 at last and belonged on 82, because air-flow velocity is big in the suffered resistance of this shaping area, so flow velocity is also minimum by the speed of structure, cause fiber accumulations density thin and even, form the equal fluid layer 83 of filter material, the hole between this structural fibers is relatively large, but the uniformity height.
The functional particle material is a filter material with " activated carbon " as described above, and when filter medium structure has by thin and close hierarchy, its adsorption efficiency will be more superior than the efficient of single filter medium structure.When a pollution sources air communication filter material, its airflow direction as shown in Figure 4, enter by equal fluid layer 83, when overcoat 81 flows out, all the stereochemical structure of fluid layer 81 is thinner, when air communication is crossed fiber 1 aggregate, to be evenly dispersed, therefore increase the area that pollution sources pass through active carbon adsorption layer 82 respectively, make the pollution sources air-flow all diffuse into the activated carbon fiber interlaced plies, when the thickness by filter material increased, air-flow velocity also reduced because of diffusion and resistance, made to pollute the molecule holdup time and increase, adsorbed by activated carbon 2 simultaneously, and the packed structures of overcoat 81 its staple fibre 1 aggregates of filter material 8 is fine and close, to the resistance maximum that air-flow produces, therefore can control the holdup time of gas stream of pollution at adsorption layer 82 relatively.And the present invention is in the design of composite gas air-jet device 3, can adjust the area ratio of airflow diversion zone A1, A2, A3, the ulking thickness ratio of filter medium structure layering in the time of relatively can controlling moulding is according to the required condition of actual filtration absorption pollution sources, give suitable adjustment, with best service efficiency, meet client's demand, that is heal when high when the ulking thickness of overcoat 81, the gas-flow resistance height of whole filter material 8, pollute the molecule holdup time and also extend, adsorption efficiency increases, and vice versa.
In addition, in the middle of the equal fluid layer 83 of filter medium structure is sandwiched in adsorption layer 82 with overcoat 81, can prevent moving or coming off of active carbon particle 2, and adsorption layer 82 middle short fibers and activated carbon 2 form the stereochemical structure that interweaves simultaneously, the displacement that also can prevent active carbon particle breaks away from, so whole filter material 8 structure stability height after moulding, the uniformity is also good.And in the filter medium structure, the mixed proportion of staple fibre and activated carbon, also can in processing procedure, give quantification control, in the present invention, activated carbon content can be controlled in 10%～90% scope, short fibre content also can be controlled in this scope relatively, its structure and two materials disperse all can keep certain uniformity, but the structure of high or low relatively content, on general actual adsorption filtration is used and few, therefore, at activated carbon optimum content after the test between 60%～90%, overall performance the best of filter material 8, fiber content is between 15%～40% relatively.And the filter material overall basis changes, and utilizes this processing procedure can be from low weight 100g/m
2Paramount weight 1,200g/m
2All moulding simultaneously need not utilize layer and the stacking incompatible purpose that reaches a large amount or high-load.Therefore with the technology of aerodynamic force composite molding, can control the content ratio of composition simultaneously, and the variation of filter material basic weight, all conditions all can be adjusted the control one-shot forming simultaneously in processing procedure, not need to finish through follow-up repeatedly processing again, so the dynamogenetic value height of this process technique.
In addition, along with the filter material basis weight variation, can select different fiber Zhi Jing (being red Buddhist nun's number), with the composite molding mutually of active carbon particle size, still can reach above-mentioned uniform structure, and the stability height, unlike other processing procedure, add activated carbon again with the fiber web stereochemical structure after the moulding, when the filter material basic weight is light or thin, if fibre diameter is big, then the hole of Xing Chenging is also big, as will making activated carbon be fixed between fiber that then particle also must be big in the hole, so the unit quantity height of activated carbon, desire to reach the lightweight basic weight, then in equal filter material area, the active carbon particle number must reduce relatively, thereby it is thin and inhomogeneous to cause activated carbon to distribute, and adsorption efficiency reduces greatly.Dwindle as fibre diameter, then the number of fiber of unit are must increase, just can form space network, thus, interfibrous hole diminishes, thereby cause active carbon particle can't evenly completely enter between fiber in the hole, make that the structure stability is poor, the activated carbon loss is also high, so the filter material adsorption function is poor.And the present invention sets forth it, simultaneously staple fibre 1 is mixed with activated carbon 2 with aerodynamic force, one-time formed processing procedure interweaves, then there is not above-mentioned shortcoming, because of two materials are the moulding that interweave simultaneously, therefore no matter how fibre diameter size or active carbon particle size change, as long as both arrange in pairs or groups appropriately, all can make uniformity height, the absorption filtering material that the structure stability is high.
Main absorption property mixes the part that interweaves at staple fibre and finishes with activated carbon when the filter material moulding, and promptly adsorption layer 82, two materials disperse in air-flow, mix the back and pile up moulding, because of the stereoscopic shape difference of two kinds of materials, the transmission flowability in air-flow is also different, and bulk density is also different.Active carbon particle 2 is a solid irregular, in the air forming banking process, produce obstruction because of steric hindrance between particle, make the interstitial space of 2 of active carbon particles quite big, as shown in Figure 6,2 hole spaces that produced of activated carbon, and when air-flow power passes through, this hole space becomes the main runner of air-flow, because of the receptor 1 activity carbon granule hinders event.In this simultaneously, entrained extremely short fiber 1 is with the dispersion flows height of air-flow in the moulding air-flow, and filling flows between activated carbon 2 holes, and the factor that stops of receptor 1 activity carbon granule, form fiber assembly network structure 1 and pile up, and then make whole gas-flow resistance average, by the air-flow velocity homogeneous, the adsorbed layer structure of filter material is stable after the moulding relatively, and staple fibre 1 evenly disperses to be woven into the uniform stereochemical structure of bulk density with activated carbon 2, as shown in Figure 4, it mainly is that factor by the aerodynamic force moulding just can reach this structure.
Yet, behind staple fibre 1 and activated carbon 2 mixed-formings, when air communication out-of-date, due to receptor 1 activity carbon 2 steric hindrances, the air-flow part flows through from activated carbon surface, major part is then passed through by 1 of fiber assembly, because of the bulk density of 1 of staple fibre aggregate is to be formed by aerodynamic force, therefore density is even, and the gas-flow resistance that gas-flow resistance homogeneous and specific activity carbon granule 2 are caused comes lowly, so during with this filter medium structure adsorption filtration, polluting molecule passes through major part from 1 on staple fibre, and when being the penetrability series connection between the fiber assembly, easily make the pollution molecule directly run through filter material 8, and make activated carbon 2 can't bring into play the essence effect.
From the above mentioned, form non-rectilinear airflow path and increase and activated carbon surface contacting structure and will become the functional main key point of active carbon adsorption filter material, and at this relation, there is no any relevant process technique that how to reach this structure of mentioning in the prior art, in aerodynamic force composite forming technology of the present invention, be power with gas earlier, staple fibre 1 and activated carbon 2 evenly disperseed and be woven into stereochemical structure, be prerequisite, must have the absolute high uniformity between the two, and then with the special heat treatment of 8 enforcements of the filter material after the moulding, as shown in Figure 2.Filter material 8 after moulding utilizes forming web 52 to send into heat treatment shaping area 6, and this moment, one deck location was added again with forming web 54 in filter material 8 tops, and heat treatment temperature is controlled between 120 ℃～180 ℃, decides according to speed of production and filter material basic weight.Heat treatment mode is not to penetrate irradiation or hot air circulation mode of heating with the simple width of cloth, but thermal source 61 heating in filter material 8 tops with the far infrared, simultaneously air-breathing with getter device 62 below filter material 8, this purpose is that thermal current is run through filter material 8, it is heated evenly, and when air-breathing, reason filter material 8 belows are air-breathing, therefore filter material 8 is understood because of self three-dimensional thickness and to air-flow generation resistance, bigger near suction side suction, on the contrary suction is little, so filter material 8 is when being heated, its structure keeps obviously by thin and close structure, and therefore planting structurally has absolute usefulness aforementioned to adsorption function.When the filter material after the heat treatment leaves thermal chamber, entering the cooling zone immediately and also continuing when cooling continues air-breathing downwards with a getter device 71, mainly be to guarantee that structure is heat-treated in the cooling coiling process by being formed into, the uniformity of structure is promptly by thin and close stereochemical structure.
In addition, when staple fibre 1 through heat treatment, when reaching its softening point temperature, fiber surface promptly begins fusion and fiber begins to produce the phenomenon of thermal contraction, during melt surface, cause staple fibre 1 and the adhesion mutually of activated carbon 2 surfaces, and adhesion mutually between staple fibre and the staple fibre, and shrink simultaneously, therefore after heat treatment, filter material 8 promotes structural strength and stability because of the sticking effect of fiber greatly, and fiber is still possessed its flexibility, so the disturbed Qu Xingjia of filter material, relatively machinability is also good, on the other hand, for activated carbon 2, heat treatment can not make its melt surface or contraction, but heat is the main energy of activated carbon desorption and regeneration, therefore activated carbon can be given the effect of dehumidification and reactivation, the absorption property of possessing activated carbon the best, and utilize this adhesion system, need not use any sticker to come reinforced structure, activated carbon 2 surfaces are coated to sticker, effectively the absorption external surface area is big, relatively the absorption property height of filter material.
When heat treatment, heat makes filament contraction, therefore being filled in the short fiber assembly of activated carbon 2 inter-granular porosity 1 shrinks, as Fig. 5, shown in Figure 7, cause that the interface hole dwindles between fiber and fiber, it is fine and close that the density of texture of fiber assembly 1 integral body is tending towards, relatively gas-flow resistance is become big, and the interface hole between staple fibre 1 and particle 2 surfaces becomes big, is that 2 of active carbon particles do not shrink because during filament contraction, and because of the steric hindrance factor can not produce extensive displacement because of filament contraction, still possess its pore size, hole increases between staple fibre 1 and activated carbon 2 surfaces so cause, and it is loose that structure herein then is tending towards.This phenomenon can be demonstrated by the enlarged diagram of Fig. 7 filter material.Therefore when the chemical contamination air communication is crossed the activated carbon absorption filtering material, be subjected to activated carbon 2 and shrink after fiber assembly 1 resistance due to, main is that runner 84 passes through filter material with the hole between fiber and the activated carbon surface, relatively improve and pollute the probability that molecule contacts with activated carbon surface in the air-flow, adsorption efficiency will significantly promote, and be better than other activated carbon filter material.And because of filter medium structure is the three-dimensional space stereochemical structure, the runner 84 that is produced thus increases the holdup time of air communication filter material for non-directional around the song runner, and the time that makes active carbon adsorption pollute molecule increases, and also promotes the allomeric function of filter material.
In sum, the present invention is shaped to three-decker filter material technology with aerodynamic force crossed fiber and functional particle shape material activated carbon, not only can make the high adsorption function filter material of even structure stability, and utilize special thermal treatment, the control filter material produces critical structures, improve adsorption efficiency, and the plyability of product and variability more are better than other adsorptivity filter material.
Claims (5)
1. one kind is utilized the interweave forming method of Compound filtering material of aerodynamic force, it is characterized in that its step is as follows:
(a) utilize air-flow that staple fibre and functional particle material are delivered to a composite gas air-jet device respectively, and the feeding air-flow of particle matter is to be located in the middle of the composite gas air-jet device, and the feeding air-flow that makes the two enters diffusion mixing transmission district simultaneously, mixing feeding air-flow drive staple fibre and particle matter are from top to bottom spread, and the guiding device of flowing through, make steady air current be sent to the MULTILAYER COMPOSITE shaping area of below;
(b) utilize the getter device of being located at MULTILAYER COMPOSITE shaping area below, staple fibre and particle matter are adsorbed on the forming web that is deposited in a motion in regular turn, and adjust the inspiratory capacity of getter device on demand, make it and mix the feeding air-flow and reach balance, can on the forming web of motion, form the filter material of multilayer by thin and close gradually layer structure;
(c) filter material of aforementioned moulding is sent into the heat treatment shaping area, with thermal source heating, and with heating and temperature control between 120 ℃～180 ℃;
(d) the aforementioned filter material that adds HEAT SETTING is sent into the cooling zone.
2. the interweave forming method of Compound filtering material of aerodynamic force that utilizes according to claim 1 is characterized in that described functional particle material is activated carbon, potassinm permanganate impregnated alumina or chemisorbed polymer substance.
3. the interweave forming method of Compound filtering material of aerodynamic force that utilizes according to claim 1 is characterized in that described diffusion mixes to transmit the district and be downward opening mixing casing that set guiding device is to be made of several pieces adjustable type deflectors in it.
4. the interweave forming method of Compound filtering material of aerodynamic force that utilizes according to claim 1, it is air-breathing in addition to it is characterized in that described heat treatment shaping area continues with a getter device below filter material.
5. the interweave forming method of Compound filtering material of aerodynamic force that utilizes according to claim 1, it is characterized in that described cooling zone continue with a getter device during in cooling below the filter material down air-breathing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031445233A CN100378262C (en) | 2003-09-30 | 2003-09-30 | Forming method of interweaving composite filtering material using aerodynamic force and structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031445233A CN100378262C (en) | 2003-09-30 | 2003-09-30 | Forming method of interweaving composite filtering material using aerodynamic force and structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1603501A CN1603501A (en) | 2005-04-06 |
| CN100378262C true CN100378262C (en) | 2008-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031445233A Expired - Lifetime CN100378262C (en) | 2003-09-30 | 2003-09-30 | Forming method of interweaving composite filtering material using aerodynamic force and structure thereof |
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| CN (1) | CN100378262C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102416717B (en) * | 2011-07-22 | 2013-11-06 | 湖南亚太实业有限公司 | Production method of cluster-shaped fiber thermoplastic composite sheet material |
| CN111481996B (en) * | 2020-04-26 | 2021-12-24 | 福建恒安集团有限公司 | Adsorption-enhanced filter material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171498A (en) * | 1990-03-15 | 1992-12-15 | Pyrok Technology Limited | Manufacture of bonded particle boards |
| DE4413606A1 (en) * | 1994-03-04 | 1995-11-16 | Hasso Von Bluecher | Composite filter for motor vehicles removes acid gases and particles from the air |
| US5972427A (en) * | 1995-04-22 | 1999-10-26 | Firma Carl Freundenberg | Adsorbent, supple, filter fabric and method for its manufacture |
| JP2000117023A (en) * | 1998-10-09 | 2000-04-25 | Toyobo Co Ltd | Air cleaning filter |
| JP2001254245A (en) * | 2000-03-08 | 2001-09-21 | Gifu Prefecture | Woven fabric with photocatalytic function and method for producing the same |
-
2003
- 2003-09-30 CN CNB031445233A patent/CN100378262C/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171498A (en) * | 1990-03-15 | 1992-12-15 | Pyrok Technology Limited | Manufacture of bonded particle boards |
| DE4413606A1 (en) * | 1994-03-04 | 1995-11-16 | Hasso Von Bluecher | Composite filter for motor vehicles removes acid gases and particles from the air |
| US5972427A (en) * | 1995-04-22 | 1999-10-26 | Firma Carl Freundenberg | Adsorbent, supple, filter fabric and method for its manufacture |
| JP2000117023A (en) * | 1998-10-09 | 2000-04-25 | Toyobo Co Ltd | Air cleaning filter |
| JP2001254245A (en) * | 2000-03-08 | 2001-09-21 | Gifu Prefecture | Woven fabric with photocatalytic function and method for producing the same |
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| Publication number | Publication date |
|---|---|
| CN1603501A (en) | 2005-04-06 |
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