CN104005267A - Method and device for a fiber web production line through a coating substance - Google Patents
Method and device for a fiber web production line through a coating substance Download PDFInfo
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- CN104005267A CN104005267A CN201310581322.5A CN201310581322A CN104005267A CN 104005267 A CN104005267 A CN 104005267A CN 201310581322 A CN201310581322 A CN 201310581322A CN 104005267 A CN104005267 A CN 104005267A
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- web
- suspension
- mixture
- fiber web
- solution
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/50—Spraying or projecting
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
- D21F11/04—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
- D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers
Abstract
The invention relates to a method for applying a substance to generate at least one web layer of a fiber web, in which method a substance mixture or suspension or dispersion or solution is applied on a moving surface by at least one spraying and atomizing means. In the method the at least one web layer of fiber web is generated on to moving surface by providing an atomized substance spray comprising fiber particles by the at least one spraying and atomizing means to apply the substance mixture or suspension or dispersion or solution flow as a high viscosity and high consistency mixture or suspension or dispersion or solution, which has the consistency over 5 %. In the method the substance flow is sprayed and atomized by the at least one spraying and atomizing means comprising at least one rotary application means and fiber web is generated partly or completely by applying in contactless manner fibrous substance in form of mixture or suspension or dispersion or solution. The invention also relates to an arrangement for applying a substance to form at least one web layer of a fiber web, which arrangement comprises at least one spraying and atomizing means and moving surface. The arrangement comprises at least one rotary application means for spraying and atomizing the substance mixture or suspension or dispersion or solution with high viscosity and high consistency, in which the mixture or suspension or dispersion or solution comprises fibers or fibrous particles and has the consistency over 5 %.
Description
Technical field
The present invention relates to the method and apparatus for fibrous-web manufacturing line.Especially, the present invention relates to a kind of method and apparatus that generates at least one web layer of fiber web by coating.
Background technology
As from commonly known in the art, fiber web production process generally includes the assembly consisting of a plurality of devices that arrange continuously along production line.Typical production and processing line comprise head box, forming section, press section and drying section afterwards and batching apparatus.This production and processing line also can comprise other equipment for the finishing of fiber web and/or portion, for example precalender, sizing applicator, coating part, last calender.This production and processing line also comprise slitting rewinder and the coil packing device that at least one is used to form user volume.In this description and the claims of enclosing, fiber web for example refers to paper web and cardboard web.
In atomization and spraying technique, term " spray (thing) " refers to the system of the drop that is gas phase, i.e. gas-liquid mixture or outstanding bleaching liquor, and it is provided by atomization process.And the liquid of injection can comprise solution or the mixture of several liquid or fluid.In addition, for example, as the mixture that makes to contain solids or the result of suspension or outstanding bleaching liquor or solution atomization, ejecta can contain solid particle.
Course of injection comprises two subprocess, namely atomization process itself and the process of jet particle being transferred to target surface.Atomization process (be about to liquid phase or solid phase resolve into less particle or drop) the normally friction between the material based on aerodynamic shearing force and injection and other media (being generally ambient gas) carries out.Speed difference between two media produces in several ways, as the hydraulic pressure by drive nozzle and by the pneumatic air pressure in air atomizer spray nozzle, produces.In atomization process, the liquid of injection is subject to hindering the impact of the cohesiveness that drop forms.Bursting force (as the shearing force being formed by atomizer or inertia force) is tending towards interrupting continuous liquid phase, once and bursting force be greater than cohesive force, form drop.The formation of fluid viscosity and effect of surface tension drop and jet produces.
Another subprocess in injection, jet particle is transferred to target surface, conventionally utilizes as guide the device of air-flow or assistance electrostatic field, to control injection stream shape, move and be set to target surface.
The known atomizer of prior art for example comprises single fluid hydraulic pressure nozzle, two-fluid gas atomizing nozzle, centrifugal or rotary atomizer, ultrasonic atomizer and electric hydrodynamic atomizer.In the hydrodynamic pressure atomization with single fluid tip, liquid is accelerated by the pressure of liquid itself, and the speed of liquid, kinetic energy and with the friction of medium be around the driving factors of atomization.At the pneumatic or gas with two-fluid spray nozzle, assist in atomization, atomization air flow is accelerated and neighboringly injected with the fluid of atomization.Air and gas mix can be in inside or outside carry out.Speed difference between two media, friction and shearing force are the principal elements of atomization.In centrifugal or rotary-atomizing, fluid is applied to quick rotating disk or wheel is upper, and wherein when centrifugal force accelerates fluid, this fluid obtains momentum, and the outward flange of direction of flow disk, finally forms herein drop and atomization occurs when fluid leaves disk.
In fiber web is produced, it is known by fluid tip, material being coated on fiber web with the form of spraying.For example, by nozzle, the starch solution of water, chemicals, dilution, coating substance are coated on fiber web or in fiber web.For smooth and easy and uniform coat is provided, by utilizing hydrodynamic or pneumatic nebulization principle (conventionally using the some nozzles of a row) that surge thing is atomized.The flow rate of fluid tip is limited to specific value, and if particularly injecting substances contain solid-state hard particles, during as coating, stuffing and other mineral matters, easily there are wearing and tearing and spray quality to decline.Therefore, relate to the wearing and tearing that problem is nozzle of nozzle ejection, especially when spray mixture or suspension or outstanding bleaching liquor or solution are all the more so during containing hard solid particle just like mineral matter and so on.Conventionally, pulp mixture or suspension or outstanding bleaching liquor or solution contain stuffing, pigment and other hard, inorganic particles, as sand and for example from other impurity of removal process.
Conventionally, in fiber web is produced, on the forming section after head box, form fiber web, head box is supplied to mobile network by fibrous suspension.The function of forming section is to remove water to keep good shaping the suspension of supplying with from head box.The denseness that is supplied to the fibrous suspension on forming section normally 1%, and through after forming section, the denseness of formed web 18%-20% normally on this forming section.Supply denseness is higher causes shaping poor conventionally, and this has negative effect aspect web end features.Therefore, in producing, typical fiber web avoids applying the supply denseness higher than 1.5%.
In No. 6237525 patent of the U.S., disclosed a kind of ultrasonic atomizatio apparatus, it is for by large-area oscillating plate coated fiber web, so that the atomization ability of raising and the production flow rate of atomization (throughput flow rate, the flow rate of handling up) to be provided.
In No. 3475198 patent of the U.S., disclosed a kind of rotary-atomizing process and distributing equipment, it applies fluid binder for the manufacture at nonwoven fiber web.This known process is for the treatment of the loose fibre structure in web (wherein fiber should not upset by air-flow), and for applying the high viscosity liquid adhesive that is difficult to atomization, as starch and polyethylene acetate.In this known device, with rotary atomizer, avoid the problem of spray nozzle clogging, and by for improve jet particle transfer efficiency high-voltage electrostatic field make the flow rate obtain for improving.
In patent application publication US2001/0048976, disclosed a kind of method and apparatus for example, applying for the medium of liquid state, powder or solid-state form being applied to the injection of mobile web (paper web or board web), wherein use single fluid tip, two fluid tips or rotating disk applicator as injection apparatus, and the electric power producing by charging device strengthen to spray and shift (spray transfer).
In No. 3484275 patent of the U.S., disclosed a kind of method of utilizing electrostatic precipitation to be coated with for example mobile paper web, wherein the coating of atomization is transferred under the impact of electrostatic force, and for example can carry out atomization by rotating disk.
In No. 6866207 patent of the U.S., disclosed a kind of vortex gas atomizer, its for by liquid and high viscosity or the solution that is difficult to the liquid that distributes and solids be distributed into the fog-like body of the characteristic with expectation.Disclosed a kind of device for atomizing of liquids and the solution that contains solid particle (as paper fiber and stuffing, for mixing and the chemical reaction of the manufacture of the paper of high-consistency, paper surface treatment, chemicals).This device allows in paper machine, to form denseness and reaches 15% web.This atomizer comprises: microscler pipe; Inlet hole, is arranged on one end of this pipe; Nozzle assembly, is attached to the end opposite of this pipe; The first nozzle member, extends from nozzle assembly at a certain angle with respect to the axis of this pipe; Scroll; And conical building mortion, with respect to this pipe, arrange with one heart, and be suitable for receiving propelling gas from this first nozzle member, and this taper shape building mortion comprises the angled vortex protuberance of the inside tool of axis (swirl ledge) with respect to pipe.
In No. 7217342 patent of the U.S., disclosed a kind of technical process, it can utilize existing papermaking facility, and add continuous injection apparatus, this continuous injection apparatus can participate in and/or promote the manufacture of a large amount of specific paper products on (production) line, or by the injecting step on the line carrying out or under line thereupon, improves the characteristic of established paper product.(this patent) disclosed a kind of device for papermaking, and it comprises: jet box; Paper web substrate, is movably located on the below of jet box; A plurality of nozzles, be arranged on the inner side of jet box, in order to carry out cross section shaping, this shaping is by each nozzle, the suspension solids that comprises fiber, mineral and chemicals of controlled quatity to be ejected on substrate and to be realized, this jet box comprises substrate inlet point and substrate exit point, above-mentioned inlet point and exit point comprise that being respectively arranged on the adjustable of this substrate top enters gap and exit gap, launches aerosol from said nozzle; In order to remove aerocolloidal device from this jet box; For the level and smooth device of surface characteristic of the solids that makes to suspend, it has a far-end, in a side of this far-end adjacent substrates a bit; Roller, is arranged on opposite side the adjacency with it of substrate, and the point of this vicinity laterally separates along the position of substrate and adjacency section.
In actual paper and production, the subject matter of the known application aspect the solids that contains mixture or suspension or outstanding bleaching liquor or solution in injection is Flow in Nozzle limited ability.At present, the best air atomizer spray nozzle that produces acceptable jet quality has the about 0.5kg/ of each nozzle minute (0.008kg/s) mass flowrate.For example, the speed with 1200m/min forms 5g/m in fiber web
2(doing) material layer, need to be on width the dry mass stream of every meter of 0.1kg/s; In the mixture of 15% denseness or suspension or outstanding bleaching liquor or solution, apply identical dry matter content, material stream is every meter of 0.67kg/s on width.This means on width every meter need to approximately 80 nozzles.This is the most optimistic situation, and in fact practicable denseness is about 8%; Therefore, the quantity of nozzle will be increased to 150pcs/m.Certainly, the nozzle of this quantity can be arranged to some rows, but this still causes very complicated and huge nozzle system.
Another problem that traditional nozzle has is that the opereating specification relevant to denseness and viscosity is limited.Practice shows, by using low-pressure air atomizing device conventionally can spray the high viscosity liquid material (as starch solution) that reaches 50-100c viscosity.Yet high-pressure and hydraulic nozzle can spray the material of higher viscosity and denseness, for example denseness reaches 60% coating.
Another problem of the jet blower using is that coverage is narrow.Conventionally, a large amount of jet blowers need to be assembled into intensive array, the 20-50mm only for example along the significant interval of transverse machine.
Because fiber is tending towards forming the structure of networking, high-consistency fibre blend or suspension or outstanding bleaching liquor are difficult to pumped and atomization.If flow velocity is too slow, may causes stopping up, and needed fluidisation before pump is inhaled or sprayed.
Fibrous mixture or suspension or outstanding bleaching liquor or solution have very high viscosity conventionally, and they have shear thinning characteristic.In done measurement (use No. 2 main shaft, measured by Brookfield viscometer under 100rpm rotating speed), find that typical viscosity obviously surpasses 100cP under 5% denseness, be generally 500-10000cP or larger.
Due to above-mentioned these reasons, can not apply containing material fiber with high-consistency (conventionally surpassing 5%) or high viscosity (being generally 100-1000cP or larger).As the above mentioned, in fiber web is produced, due to low flow rate (the about 0.5l/min of each nozzle), available denseness (being usually less than 5-8% for air atomizer spray nozzle) and the reason of viscosity (about 100cP is following), spray and atomization coating restricted.Therefore, in practice, the material being applied by fluid tip is actually and applies as low denseness mixture or suspension or outstanding bleaching liquor or the aqueous solution.
In practice, be to adopt contact painting method to apply coating and applying glue mixture, suspension or solution.Shortcoming in this class contact painting method is that the behavior in service of with high costs and fiber web of required equipment is lower.
Summary of the invention
The object of the invention is to create a kind of new method and new equipment of coating substance, these materials have the high-consistency that surpasses 5%, advantageously surpasses 10%, and the form that is mixture or suspension or outstanding bleaching liquor or solution, to generate at least one web layer of fiber web.
In addition, the object of this invention is to provide can in the generation of fiber web, use, in fiber web is produced the method and apparatus of coating substance.
To achieve these goals, the present invention proposes a kind of method that generates at least one web layer of fiber web by coating substance.In the method, by least one injection and atomising device, mixture of substances or suspension or outstanding bleaching liquor or solution are coated on translational surface; In the method, by the surge thing of the atomization that comprises fibrous particle is provided by described at least one injection and atomising device, apply mixture or mixture of substances or suspension or outstanding bleaching liquor or flow of solution suspension or outstanding bleaching liquor or solution, that there is the denseness that surpasses 5% as high viscosity and high-consistency, and at least one web layer of fiber web is generated on translational surface; And in the method, by described at least one injection and the atomising device that comprise at least one rotary coating device, spray also atomization material stream, and partially or even wholly generate fiber web by be the fibrous matter of mixture or suspension or outstanding bleaching liquor or solution form with cordless coating.
To achieve these goals, the invention allows for a kind of device that forms at least one web layer of fiber web by coating substance, this device comprises at least one injection and atomising device and translational surface, it is characterized in that, described device comprises at least one rotary coating device, mixture of substances or suspension or outstanding bleaching liquor or the solution in order to spray also atomization with high viscosity and high-consistency, wherein said mixture or suspension or outstanding bleaching liquor or solution comprise fiber or fibrous particle, and have the denseness that surpasses 5%.
In this description and the claims of enclosing, " fiber " and " fibrous material " means to comprise fibrous material, the fine fraction fiber that screens suitable thickness, the nano-cellulose taking various forms, the NFC(nanometer fibrillation cellulose in fiber, nature or synthetic source); MFC(micron fibrillation cellulose), the materials such as paper pulp of refine or impact paper pulp (beaten pulp), processing with chemistry or mechanical system.Fibrous material also can comprise for example stuffing, pigment and adhesive.What also note that is, one deck fiber web in described in this description and claims is mainly used in the implication in the meaning of manufacturing fiber web, and therefore, in the fiber web product of making, layer needs not to be visible or separable, and owing to may have the layer of combination between two layers, so these layers can not have obvious border.
According to the present invention, in the method for at least one web layer that generates fiber web by coating substance, by least one injection and atomising device, the material that is mixture or suspension or outstanding bleaching liquor or solution form is coated on translational surface.In the method, by the surge of the atomization that comprises fiber and/or fibrous particle is provided by least one injection and atomising device, apply that (its denseness surpasses 5% as the mixture of substances of high viscosity and high-consistency mixture or suspension or outstanding bleaching liquor or solution or suspension or outstanding bleaching liquor or flow of solution, preferably surpass 10%), and at least one web layer of fiber web is generated on translational surface, and spray and this material stream of atomization by the applicator that comprises at least one rotary coating device, and partially or fully by apply the fibrous substance of the form that is mixture or suspension or outstanding bleaching liquor or solution with non-contacting method, generate fiber web.
According to the present invention, the device that generates at least one web layer of fiber web by coating substance comprises at least one atomising device and translational surface, and at least one is as the rotary coating device of applicator, mixture of substances or suspension or outstanding bleaching liquor or the solution in order to spray also atomization with high viscosity and high-consistency, wherein this material contains fiber grain and/or fibrous particle, and have over 5%, preferably surpass 10% denseness.
In the method according to this invention and device, the material that will apply by rotary atomizer is the form of mixture or suspension or outstanding bleaching liquor or the solution of the solid particle, especially other fiber web material compositions that contain fiber and/or fibrous particle and organic or inorganic.
In the method, advantageously, at least one rotary coating device is rotary atomizer, and it forms vaporific material stream based on centrifugal force, and by make material form at a high speed rotatablely move to provide atomization.Can in rotary coating device, provide centrifugal force and atomization by a plurality of spinner members (as rotor, disk, cup, bowl, impeller, vane type wheel (vaned wheel), propeller, porous wheel or similar element).
In rotating disk atomizer, material to be atomized is applied on rotating disk with High Rotation Speed, wheel or corresponding spinner member, and above-mentioned rotating disk, wheel or corresponding spinner member make liquid accelerate and at the edge of disk discharge spray thing.Drop size in atomization can be controlled by rotating speed.Spinner member can have multiple design.Rotation cup atomizer comprises the rotating disk atomizer with cup, and the liquid being atomized is supplied in the inside of this glass.When this cup is rotated, by centrifugal force, along cup surface, push fluid film to outward flange, in this outer edge, liquid is discharged from droplet, and produces ejecta.This ejecta can be controlled extraly by shaping air or by means of static.
According to a favourable feature, because rotary coating means, use rotating disk atomizer or rotation cup atomizer, so high viscosity fluid can be atomized and provide high flow rate.And high-consistency fluid can be atomized; Solids content can reach 70%, and therefore, need to remove and dry water still less and realized the saving of energy.
According to a favourable feature, rotary atomizer comprises at least one spinner member, and this spinner member is for example flat disk, bowl, cup, propeller, vane type wheel or porous wheel.
According to a favourable feature of the present invention, the material of web to be applied to comprises at least two kinds in following material: organic or inorganic fiber, organic or inorganic stuffing, pigment and adhesive, solvent fluid (as water) and as fiber web manufacture in the required additional materials such as chemicals.
According to a favourable feature of the present invention, fiber is the main component of coated mixture, and it is the form of mixture or suspension or the outstanding bleaching liquor of 5-25% denseness.
According to a favourable feature of the present invention, the fiber that coated material comprises following kind: staple fibre, long fiber, nano-cellulose fiber, nanometer fibrillation cellulose (NFC); Micron fibrillation cellulose (MFC); Mechanical pulp or chemical pulp or their combination, or regenerated fiber.
In the method according to the invention, advantageously with high flow rate, spray material to be coated.This flow rate is each applicator unit 0.5-1000kg/min.In spraying thin list surface layer, flow rate is advantageously 0.5-10kg/min, and in the formation of single width material layer, flow rate is advantageously 10-100kg/min, and in the formation of thick body layer or whole web structure, flow rate is 100-1000kg/min.
About the present invention, advantageously, by controlling the rotating speed of rotary coating device, control uniformity and the granularity of atomization.In the method according to the invention, for the drop size of the flowing material of atomization, be about 20-200 μ m, be advantageously 20-100 μ m.When the flow-like material that coating contains larger solid particle, during as fibre blend or suspension or outstanding bleaching liquor, the solid phase particles size in ejecta remains unchanged, but liquid phase is atomized into less particle, is conventionally atomized into the drop of 20-200 μ m.
Advantageously, all layers of fiber web all generate by the coating unit rotating.In this case, the machine direction of fiber web is random to a great extent, and has realized the material character of isotropic.Particularly curling and horizontal along the CD(of paper by having reduced paper) and MD(and direction thereof) size change, this stability for size is highly profitable.
Advantageously, when not every layer is all while generating according to this favourable scheme, at least one layer is by generating with rotary coating device according to this scheme, and other layer can be by conventional method, as wet-formed or be shaped or foam forming (it can obtain very porous web) and advantageously generating by airlaid.
According to a favourable feature, by rotary coating device using the material that comprises fiber and possible additive as mixture or suspension or outstanding bleaching liquor be coated on a translational surface, be for example coated on forming net, or be directly coated on fiber web.According to a favourable feature, the opposite side at the translational surface relevant with rotary coating device, can arrange suction apparatus, as vacuum tank.
When generating one or more web layer of fiber web according to this favourable scheme, produce fiber web bulky and large volume.When favourable scheme according to the present invention generates the web layer more than one deck, by the rotary coating device by continuous, apply the material of heterogeneity, the layer structure of the fiber web with web layer of different nature can be provided.
And, when generating all layers of fiber web according to this scheme, in fibrous-web manufacturing line, no longer need head box.
According to a favourable feature, by the rotary coating device on fiber web, high viscosity interlayer is coated as high solids content and full-bodied aqueous mixtures or suspension or outstanding bleaching liquor or solution.This interlayer is thin, closely knit polymeric layer, and for example it comprises as the polymer of polyolefin or polyethylene, polypropylene, PVOH or PVA and so on or special copolymer or various forms of nano-cellulose.
Coating by rotary coating device can directly be carried out, also being about to material is directly coated on fiber web, or indirectly carry out, also be about to material and (be for example first coated in translational surface, net, woollen blanket, band, metal tape) on upper or roller, afterwards material is transferred to fiber web from this.
According to a favourable feature, coated material was heated before applying by rotary coating device, the consequently better flattening of coat, better arrangement and dry faster.
According to a favourable feature, material is mixed with another material in the rotor elements of applicator, and local mixing process is provided in applicator.For example, can, just before (material) atomization being coated in web, as the last stage, rapid-action chemicals be mixed.Spinner member operates as impeller and chemical reactor.Mixed material is fed into blender by independent supply lines.The second compounding substances can be for example liquid, stuffing, fiber, chemicals etc.
According to a favourable feature of the present invention, once coated material is atomized and distributes from atomizer, when the material applying still transmits in air, because evaporation of water starts to be dried, and dry at least in part before material is applied to fiber web.Evaporation is enhanced because of heating, and drop size is controlled.
According to a scheme of the present invention, material is applied to fiber web, and this fiber web is paper handkerchief (toilet paper) web, paper web, cardboard web, or speciality paper or specialty board product.
And the method according to this invention and device are advantageously used in fiber web is produced, coating substance in the fiber web coating of the coating by one deck fibre-bearing or fiber-based material or applying glue.According to a favourable feature of the present invention, the pigment of coating is the main composition of the material of coating, and the material of this coating is the mixture of denseness or the form of suspension or outstanding bleaching liquor or solution of 5-70%.According to a scheme of the present invention, sizing agent is the main component of the material of coating, and the material of this coating is the liquid mixture of sizing agent or the form of suspension or outstanding bleaching liquor or solution of the denseness of 5-30%.
By the present invention with and favourable scheme and feature, realized a plurality of advantages.The invention provides a kind of for apply the effective device of high-consistency and full-bodied material by injection and atomization.Can be by laterally supplying with the amount that (infeed) flow rate is controlled injection independently.The particle size of the ejecta of atomization can be controlled individually by the rotating speed of spinner member.The required apparatus structure of the method is simple, substantially only needs air or the gas of pressurization and the inlet duct that leads to rotary coating device.The present invention also provides the high-consistency of the recirculated water with better retentivity and less amount and the possibility that high viscosity is shaped.And, can produce tencel web product, for example by fibre-bearing coating, replace pigment coated.Because the nozzle of the rotary atomizer advantageously using is also insensitive to obstruction or wearing and tearing, therefore obtained further advantage, this makes downtime, maintenance work and the cost of machine be reduced and save.
In the method and apparatus of invention, at least one injection and atomising device provide the favourable atomization system with the production flow rate higher than traditional fluid tip technology, the production flow rate of this atomization system is for surpassing each nozzle 0.5kg/min, be advantageously 0.5-10kg/min, be particularly advantageously 10-100kg/min, and be each nozzle 100-1000kg/min in the extreme harsh coating of condition, therefore can form at least web layer of one deck fiber web with high flow rate blasting materials, making injection form real (technique) selects, and reduced the quantity of nozzle and saved assembling space.In addition, favourable atomization system atomization high-consistency and high-viscosity material, as liquid and liquid-solid system, mixture or suspension or outstanding bleaching liquor or solution and analog, effectively to form at least one web layer of fiber web, the denseness of described material surpasses 5%, advantageously surpass 15%, and even surpass 20%, described material is applied on translational surface, for example, be coated on fiber web woven fabric or fiber web.Especially, the invention provides a kind of manufacture and finishing (ornamenting) process of new fiber web, and manufacture with web shape mode value-added fiber product High-efficient Production, brand-new in large quantities.Conventionally, by making atomizer there is the ability of atomization high-consistency and high viscosity mixture or suspension or outstanding bleaching liquor or solution, can realize to there is high atomization production flow rate, can be in little space with compact mode be mounted, have low supply lines pressure, to multiple advantages such as the dust of the obstruction of applicator and accumulation and dirt sensitivity and easy cleanings.
The present invention can be used for the production of the fiber web of dissimilar final products, for example: for having packing board bulky or sandwich construction or laminated or interlayer; For thering is liquid and family's packing board of interlayer or polymer coating, high-quality surface and the coat of paint; Be used for having interlayer and high-intensity drink and food packing board; For thering is cosmetics and the luxury goods cardboard of the coat of paint, interlayer, polymer coating or laminated layer; For thering are interlayer or laminated medicine and other particular packing cardboards; For thering is the decorated board of the effect of special coating or similar drawing; And paper and cardboard for painting.Particularly, the present invention can apply in the production of bulky paper, cardboard or paper handkerchief web.
The present invention also can use in finishing fiber web, wherein according at least one the web layer that the invention provides fiber web, make by least one rotary coating device, a coating or sizing material material to be coated on fiber web, and therefore for fiber web provides, be preferably high-consistency and full-bodied sizing material or coated substance.This coated substance comprises pigment, adhesive, stuffing and solvent, and coated as having the mixture of high solids content and full-bodied water or suspension or outstanding bleaching liquor.This sizing material material comprises starch, latex or other sizing agents, and its mixture as water or suspension or outstanding bleaching liquor or solution and coated.Above-mentioned sizing material or coated substance also can apply by a plurality of continuous whirligigs, to form sizing material or the coating of stratiform on fiber web.
The coating object that depends on expectation, is arranged on rotary coating device one or more positions of fibrous-web manufacturing line, and advantageously in the forming section of fibrous-web manufacturing line, applies.Advantageously, in forming section, by a plurality of main layer of rotary coating device producd fibers web, and can in squeezing or drying section, apply additional layer.In finishing portion, advantageously by rotary coating device, fiber web is carried out to applying glue and/or coating.
Accompanying drawing explanation
Hereinafter, with reference to accompanying drawing, explain in more detail the present invention, wherein:
An example of the schematically illustrated rotary coating device of Fig. 1;
Another example of the schematically illustrated rotary coating device of Fig. 2;
Fig. 3 is schematically illustrated to be had according to the example of a part for the fibrous-web manufacturing line of the device of example of the present invention; And
Schematically illustrated another example having according to a part for the fibrous-web manufacturing line of the device of example of the present invention of Fig. 4.
The specific embodiment
In the following description, if not be otherwise noted, identical Reference numeral all refers to identical or corresponding part or the parts of above-mentioned example.
Schematically illustrated rotary coating device 10 example in Fig. 1, this rotary coating device is rotating disk atomizer, and comprises the disk 11 can be rotatably set on axle 12.This rotating disk atomizer also comprises actuator 13, in order to rotatablely moving of disk 11 to be provided.By fluid hose 15 or corresponding access road, on rotating disk 11, supply with material to be coated.Control device 14 is controlled the rotating speed of disk 11 by controlling actuator 13, and control device 16 is controlled the amount of substance that will supply with on disk 11.When until coated when forming the material of fiber web or the material on being applied to fiber web and be supplied on rotating disk 11 by fluid hose 15, by centrifugal force, on whole edges of disk, spray and this material of atomization, and by surge and be atomised to the translational surface of expectation, for example, spray and be atomised on forming net or fiber web.
Schematically illustrated rotary coating device 10 example in Fig. 2, this rotary coating device is the cup atomizer of rotation, and comprises the cup 17 can be rotatably set on axle 12.Rotating disk atomizer also comprises that actuator 13 is to provide cup 17 to rotatablely move.Treat that coated material is fed into cup 17 by fluid hose 15 or corresponding access road.Control device 14 is controlled the rotating speed of cup 17 by controlling actuator 13, and control device 16 is controlled the amount of substance in cup 17 to be supplied to.When until coated to form the material of fiber web or when the material that is applied to fiber web has been fed into cup 17 by fluid hose 15, by centrifugal force by the substance transfer on the inner surface of cup 17 to edge, and the material of dishing out on whole edge, by material atomization and be ejected into the translational surface of expectation, for example atomization and be ejected into forming net or fiber web on.
In Fig. 3 and Fig. 4, schematically show can arranging according to device of the present invention and can utilizing some positions of the method according to this invention of fibrous-web manufacturing line.
In the example of Fig. 3, rotary atomizer 101,102,103,104 is set respectively, thereby in order to atomization and jet fiber material, forms each web layer W1, W2, W3, the W4 of fiber web.The first rotary atomizer 101 is set to surge to mobile network 20, to generate the first web layer W1 or fiber web.Mobile network 20 can be for example the net of forming net type, and continuous, mobile (net) that be set to be guided by its deflector roll encircles.Rotary atomizer 102,103 jet fiber materials are subsequently to form lower one deck web layer W2, W3.The 4th rotary atomizer 104 is also set to fibrous matter to be ejected on net 30 as the first rotary atomizer 101, and it is transferred to corresponding web layer W4 on fiber web subsequently.In press section 40, web layer W1, W2, W3, W4 is squeezed to dewater, and fiber web is dried in drying section 50.In the inner side of net 20,40, ring vacuum plant can be set in order to swabbing action to be provided, thereby improve the web layer W1 on net 20,30, the stability of W4, and if if required also in order to dewater.
In the example of Fig. 4, a plurality of rotary atomizers 10 are set in order to atomization jet fiber material, thereby form the web layer of fiber web W.The first web layer is generated by head box 60, and the first rotary atomizer 10a is set to above-mentioned substance to be ejected on the fiber web W being supported by forming net 20, to generate lower one deck web layer.Mobile network 20 can be for example the net of forming net type, and it is set to continuous, the mobile ring by its deflector roll guiding.Rotary atomizer 10b jet fiber material is subsequently to form lower one deck web layer, and it is also set to fibrous matter to be ejected on net 30, and this net is transferred to corresponding web layer on fiber web W thereupon.In the inner side of net 20,40, ring vacuum plant can be set so that swabbing action to be provided, thereby improve the stability of web layer W1, W4 on net 20,30 and dewater.In press section 40, web layer is squeezed to remove moisture, and in drying section 50, fiber web is dried.After drying section 50, by other rotary atomizer 10c and 10d, generate other a plurality of web layers.In this example, first rotary atomizer of following after drying section 50 is directly injected to the first material on fiber web, and first next rotary atomizer make this layer be generated on net 70, and this net is transferred to this layer on fiber web.After drying section 50, material to be sprayed can be for example sizing material or the coated substance with fiber or fibrous particle.Each rotary atomizer 10 comprises one or more atomizations and injection unit.In the example of this accompanying drawing, rotary atomizer 10a and 10b comprise some unit.The quantity that it should be understood that above-mentioned Production Line Configured, position and rotary unit is only the example of feasible embodiment.
Claims (12)
1. a method that generates at least one web layer of fiber web by coating substance, in the method, by at least one injection and atomising device, mixture of substances or suspension or outstanding bleaching liquor or solution are coated on translational surface, it is characterized in that, in the method, by the surge thing of the atomization that comprises fibrous particle is provided by described at least one injection and atomising device, apply as the mixture of high viscosity and high-consistency or suspension or outstanding bleaching liquor or solution, mixture of substances or suspension or outstanding bleaching liquor or the flow of solution with the denseness that surpasses 5%, and at least one web layer of fiber web is generated on translational surface, and in the method, by described at least one injection and the atomising device that comprise at least one rotary coating device, spray also atomization material stream, and the fibrous matter that is mixture or suspension or outstanding bleaching liquor or solution form by applying with cordless partially or even wholly generates fiber web.
2. method according to claim 1, is characterized in that, in the method, by described rotary coating device, described material stream is applied with vaporific form, and the drop size of the fluid composition in described material stream is 20-200 μ m.
3. method according to claim 1 and 2, it is characterized in that, in the method, described at least one rotary coating device is rotary atomizer, this rotary atomizer forms vaporific material stream based on centrifugal force, and provides atomization by making described mixture of substances or suspension or outstanding bleaching liquor or solution form high-speed rotatablely moving.
4. method according to claim 3, is characterized in that, in the method, is provided for spraying the high flow rate of material to be coated, and this flow rate is each nozzle 0.5-1000kg/min, is advantageously 0.5-100kg/min.
5. according to the method described in any one of the preceding claims, it is characterized in that, in the method, before being applied by described rotary coating device, coated material is heated.
6. a device that forms at least one web layer of fiber web by coating substance, this device comprises at least one injection and atomising device and translational surface, it is characterized in that, described device comprises at least one rotary coating device, mixture of substances or suspension or outstanding bleaching liquor or the solution in order to spray also atomization with high viscosity and high-consistency, wherein said mixture or suspension or outstanding bleaching liquor or solution comprise fiber or fibrous particle, and have the denseness that surpasses 5%.
7. device according to claim 6, it is characterized in that, described at least one rotary coating device is rotary atomizer, and this rotary atomizer forms vaporific material stream based on centrifugal force, and provides atomization by making described material form high-speed rotatablely moving.
8. according to the device described in claim 6 or 7, it is characterized in that, described rotary atomizer is runner atomizer, rotating disk atomizer or rotary cup atomizer.
9. according to the device described in any one in claim 6 to 8, it is characterized in that, described device also comprises the heater being arranged at before described rotary coating device, in order to it is heated before applying described mixture of substances or suspension or outstanding bleaching liquor or solution.
10. according to the device described in any one in claim 6 to 9, it is characterized in that, described rotary coating device is arranged in fibrous-web manufacturing line according to desired coating object, is advantageously provided in the forming section of described fibrous-web manufacturing line.
11. according to the device described in any one in claim 6 to 10, it is characterized in that, described translational surface is fiber web.
12. according to the device described in any one in claim 6 to 10, it is characterized in that, described translational surface is forming net, band, woollen blanket or other moving fabrics.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13156967.5A EP2772584A1 (en) | 2013-02-27 | 2013-02-27 | Method and arrangement for a fiber web production line |
| EP13156967.5 | 2013-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104005267A true CN104005267A (en) | 2014-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310581322.5A Pending CN104005267A (en) | 2013-02-27 | 2013-11-19 | Method and device for a fiber web production line through a coating substance |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2772584A1 (en) |
| CN (1) | CN104005267A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105714591A (en) * | 2014-12-17 | 2016-06-29 | 维美德技术有限公司 | Fiber web machine forming section and secondary forming unit of multilayer forming section |
| CN108316047A (en) * | 2018-03-28 | 2018-07-24 | 华南理工大学 | The secondary fibre paper and the preparation method and application thereof of cellulose nanometer fibril enhancing |
| CN108457127A (en) * | 2017-02-20 | 2018-08-28 | 山东太阳生活用纸有限公司 | Tissue paper and preparation method thereof |
| CN109115795A (en) * | 2018-09-06 | 2019-01-01 | 赵玮 | Atomization system, detection device and working method using the atomization system |
| CN111836928A (en) * | 2018-04-05 | 2020-10-27 | 维美德技术有限公司 | Method with horizontal jet applicator for the wet end of a paper machine |
| CN113906182A (en) * | 2019-04-09 | 2022-01-07 | 凯登拉莫 | Method for depositing cellulose fibres on a substrate |
| CN115461391A (en) * | 2020-04-15 | 2022-12-09 | 斯道拉恩索公司 | Multilayer film comprising highly refined cellulose fibers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SE544670C2 (en) * | 2020-04-15 | 2022-10-11 | Stora Enso Oyj | A method for manufacturing a multilayer film comprising highly refined cellulose fibers |
| SE544671C2 (en) * | 2020-04-15 | 2022-10-11 | Stora Enso Oyj | Method for manufacturing a multilayer film comprising highly refined cellulose fibers |
| SE544892C2 (en) * | 2020-04-15 | 2022-12-20 | Stora Enso Oyj | Method for manufacturing a multilayer film comprising highly refined cellulose fibers, a multilayer film and paperboard comprising said multilayer film |
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| CN109115795A (en) * | 2018-09-06 | 2019-01-01 | 赵玮 | Atomization system, detection device and working method using the atomization system |
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| EP2772584A1 (en) | 2014-09-03 |
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Application publication date: 20140827 |