CN103189568A - Process for producing multilayer fiber web - Google Patents
Process for producing multilayer fiber web Download PDFInfo
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- CN103189568A CN103189568A CN2010800698916A CN201080069891A CN103189568A CN 103189568 A CN103189568 A CN 103189568A CN 2010800698916 A CN2010800698916 A CN 2010800698916A CN 201080069891 A CN201080069891 A CN 201080069891A CN 103189568 A CN103189568 A CN 103189568A
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- web
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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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/10—Interconnection of layers at least one layer having inter-reactive properties
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/004—Drying webs by contact with heated surfaces or materials
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2519/00—Labels, badges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2554/00—Paper of special types, e.g. banknotes
Abstract
The invention relates to a process for producing multilayer fiber web (MLW) by joining two or more fiber webs (W1, W2, W3,...) together. The webs (W1, W2, W3,...) to be layers of the multilayer web (MLW) are joined in hot pressing zone of a joining unit (10) in which by pressing a moist fiber web together with another fiber web a tight bond between the webs that create layers of the multilayer fiber web is achieved.
Description
Technical field
Present invention relates in general in fiber web machine, make the multi-layer fiber web.The invention particularly relates to the method as described in the preamble according to claim 1.
Background technology
The multi-layer fiber web is known in the art.The purpose that fiber web is made the multilayer web normally for obtaining bigger rigidity, better surface properties and bigger bulk, realizes raw-material saving simultaneously.Typically and simplifiedly, by using the more high-grade and better paper pulp of character at superficial layer, and by using so not high-grade in the intermediate layer and the so not good paper pulp of character attempts realizing raw-material saving.
The multiple distinct methods of known manufacturing multi-layer fiber web in the prior art.A kind of mode of making the multi-layer fiber web is to use the multilayer head box, wherein prepares individually to be used for every layer pulp suspension jet in a plurality of layers of head box, and these fluids are pointed to same forming part jointly.Another kind of mode is to use several head boxs, and every layer is all used one, then with the combination in the forming part of fiber web machine or press section of a plurality of layers.From prior art, also be well known that, by between the web layer, using adhesive a plurality of layers combined, make the multi-layer fiber web together and fiber web is attached at.
United States Patent (USP) 6,059,029 has disclosed three layers of head box for the manufacture of the multi-layer fiber web.The roof of this head box and diapire tilt towards the outlet of head box toward each other.This head box has top separate blade and bottom separate blade, and top vane limits towards first Room of roof, and bottom blade is positioned at the below, limits second Room between these blades, and also limit the 3rd Room between bottom blade and diapire.Each chamber in three chambers is provided with corresponding paper pulp entrance.Be sent to paper machine forming part net through the pulp suspension liquid layer of head box, and supply with before the slurry on the net or directly be combined when supplying with slurry from three fluid streams of head box.
United States Patent (USP) 3,215,589, Deutsche Bundespatent 1049224 and United States Patent (USP) 1,347,619 disclosed and utilized adhesive or corresponding tacking agent (clueing agent) to make each layer web combine to obtain the multi-layer fiber web.
European patent 1218592 and United States Patent (USP) 6699361 have also disclosed the method for multiple known manufacturing multilayer web.
Known a kind of drying means that is called as the condensing zone drying in the prior art, this method are for example announced among the US4112586 disclosed in patent.Can make the single face web by this method.Based on the moisture of high temperature difference is shifted and condense to porous net than cold side towards a direction, this process is very effective.This copies impression than the net on the cold side at the back side of coarse web, and the use that this product is fit to has been limited at the back side of web to a great extent owing to printing quality (relatively poor).
Also known another kind is called as the scheme of the single face of boostdryer in the prior art.This method is announced among the DE102004017807 disclosed in patent.In this method, on than cold side, also have net, this net forms the marking on the surface of web.
The fiber web goods of single face drying are unaccommodated in some cases, because in the single face web, the marking on the web back side is very obstinate and lasting usually, and normally can not remove by the press polish of for example not losing bulk.Usually, it is printable having only one side in these webs.
Comprising function or intelligent attributes in fibre, is known in the art by the packaging material that function or intelligent element are attached to goods for example.The packing of being made by fiber can comprise for example about informing the indicant of the residing environment of packing: temperature, the humidity relevant with the condition of inner goods have the RFID label (hologram) that real information or safety are indicated.Commonly known in the artly be, by printing or by impression (copying), perhaps as the adhesive label or by employing plastic foil lamination with the top of these positioning parts in web.
Summary of the invention
An object of the present invention is to provide a kind of method of new manufacturing multi-layer fiber web.
Another object of the present invention provides a kind of method of making the multi-layer fiber web, has eliminated, also minimized at least shortcoming and the problem that may have in the known method in this method.
Another non-imposed purpose of the present invention provides the method that a kind of manufacturing has new (multilayer) product of function or intelligent attributes.
An object of the present invention is to solve at least a portion shortcoming and the problem relevant with the single face dry run.
In order to realize purpose above and that mention after a while, mainly limited by the feature of the characteristic of claim 1 according to process of the present invention.
According to the present invention, by with two webs by the method that the zone of heat presses together, utilize two or more fiber webs to produce the multi-layer fiber web.Push and the such condition of hot generation: wherein owing to psychrometric difference or owing to temperature difference, make steam and heat begin to flow, so that these differences become even.So just form the condition that hydrogen bond also makes these webs be bonded together thus in the borderline region between web.Method of the present invention has two main embodiment.In one embodiment, two webs are pressed together in the metal zone, and in another embodiment, two webs are pressed together in the condensation zone.Formed association class is similar to the combination that obtains by lamination, but according to the present invention, does not need to use adhesive.In engaging process according to the present invention, form combination, and under the situation of not adding adhesive, produce a plurality of combinations.Other reasons except the combination of this reality and those processes of adding some a little binder belong within the category of the present invention certainly.
In the embodiment that utilizes the metal zone, two fiber webs of different humidity level are joined so a multi-layer fiber web.In crush zone, heat and pressure produce the condition that the steam that makes in the wet web flows to another web and begins to form hydrogen bond.During crush zone, owing to hot and pressure evenly distribute the moisture in the web, so the dry composition improves.Hydrogen bond forms end-state, and keeps constant.After the combination of zone is held and during release pressure, the moisture in the web evenly distributes, and carries out further drying.
In utilizing the embodiment of condensing zone, be engaged in the condensation zone of two webs between two bands (net), one of them is hot, and another is dry.In this process, steam and the hot-fluid web on the colder band side, and form hydrogen bond.During crush zone, because heat and pressure in the web evenly distribute moisture, so the dry composition improves.Hydrogen bond forms final state, and keeps constant.Release pressure after the combination of zone is held.During this process, because steam condenses in the net than cold side, so also carried out drying.
In a favourable example, by (thin) wet fiber web (for example l Water Paper web) and another (thicker) fiber web (for example cardboard web) are pressed together, make after extruding, the final moisture content of fiber web is on close level in the final moisture content level of expectation, thereby no longer needs further drying.
During process according to the present invention, the moisture in one of them web is heated in hot extrusion (operation), makes water evaporates, and steam and heat deeper flow into web and arrive border between the web.Steam also can move past the boundary layer and arrive another web.Under wet condition, fiber and its inner natural polymerization deposits yields strong hydrogen bonding.In order to realize strong combination, advantageously the dry matter content of borderline region is preferably 30-75% below 80%.In the method, the temperature of rising makes fiber softening, and the extruding force in this district compresses this structure and cause contacting of more fiber and fiber, constitutes new combination thus, and then forms wider combination.Moist web also nonessentially has the needed so high total moisture content in border.Also can realize required humidity level by moist gradient, in this moist gradient, the humidity level on surface to be joined is bigger.Hot extrusion produces moist gradient rapidly in web inside, and steam is flowed in web.When dry tack free, steam promptly is provided to borderline region (and inner).
In an advantageous embodiments of the present invention, wait to become a plurality of webs of layer of multilayer web by being extruded at the thermometal zone, and under the situation of not using any adhesive or analog, be engaged, make that the surface of wet web is hot surface, be suitably 100-300 ℃, be preferably 120-150 ℃, and the surface of dry web is cold surface, is about 25-50 ℃ aptly.Preferably, the extrusion time in this district is about 0.2-2s, is preferably 0.3-1s, and squeeze pressure is 0.1-2MPa, advantageously is 0.1-0.5MPa.
According to an advantageous embodiments of the present invention, wet web is thinner, and the web of doing is thicker.In the method, thinner web (for example paper web) had both been done and is sliding, and was attached to thick web (cardboard web) very tightly, even if when attempting to separate these web layers, paper can be torn, rather than the combination between the destruction web.In the method, during hot extrusion, the moisture of web forms the hydrogen bond on the border that is attached to web, and these hydrogen bonds are engaged the layer of multilayer web.
Will do the engaging process that web and wet web press together each other by crush zone during, web is engaged by very strong bonding action, simultaneously, will make the surface on the side that is in metal tape become smooth.
In an example according to the monoplanar surface method for processing for the single face goods of the present invention, first fiber web is by the board machine manufacturing, and be dried to suitable aridity, dry matter content 70-95% for example, second web is by the paper machine manufacturing, and be dried to than low dry matter content, for example dry matter content 50-75%.By in long nip press, preferably between metal tape and roller, second web and first web pressed together and second web and first web is attached.In this embodiment of the invention, extruding is performed as and makes the surface of heat of crush zone be on the face of the second moist web, being on the face of first web than cold surface of crush zone.In this way, the moisture of second web shifts to first web, and the moisture in the web the most evenly distributes.Therefore do not need independent drying (operation).In crush zone, the side that is reclining than hot surface of web will become shiny surface, and it is coarse that colder face then may keep, but if required, coarse face can be carried out press polish and reaches smooth.
In an example according to the process of the both side surface processing for the two sides product of the present invention, first web of board machine manufacturing is the intermediate layer of multilayer web.This intermediate layer is dried to suitable dry matter content, for example dry matter content 80-95%.In fiber web machine, make two webs, and be dried lower dry matter content.These two wet webs are attached to the outer surface of the web of doing, and make surperficial web be extruded on the middle web of crush zone, and wherein face side contacts simultaneously or contacts the hot extrude nips two different phases.In this example, intermediate layer cardboard web is preferably more inferior grade or by paper pulp manufacturing lower, more cheap quality, for example reclaims slurry, is preferably the high concentration slurry of discharging at forming section.The intermediate layer also can be by the laying technology manufacturing, and wherein being shaped is performed as air-fibre suspension but not normally used water.Like this, by in by higher level and/or the superficial layer web made by the paper pulp of higher quality, using the web of lower grade, can save drying cost.In this example of the present invention, the web that will become the intermediate layer in the final products can be by the raw material manufacturing than low quality and/or cheapness, this is very favorable, because for example crude fibre can be accepted as bigger bar (flogginess), make manufacturing technique not only simply but also have a cost benefit.For example, on production line, only need simple forming machine and press section, when forming this web surperficial when joining web to another layer, can adopt laying technology.
According to a scheme of the present invention, the first step of this method, the device by the condensing zone type is carried out the joint of two webs, makes the net of woollen blanket to be set to receive moisture from web at crush zone than cold side.Because the marking of net, what make by this first step of this method is the single face product.After this, as second step, also can engage thinner wet fiber web at more coarse face by using the metal tape process, what perhaps replace this second step is for example to come attached thinner wet web by use standard metal band calender and by adhesive.Like this, two of this multi-layer fiber web surfaces all are smooth.
According to the humidity level of first web and second web, in the example of production two sides web, the 3rd web or wet, or do.
According to a scheme of the present invention, to be joinedly can make parent roll by a plurality of independent fiber web machines or same fiber web machine for a plurality of webs of multilayer web, and web can be transferred with the form of volume, to be combined by the extruding that utilizes thermometal band crush zone.In accordance with yet a further aspect of the invention, be used for web of the present invention and batched and be sent to second fiber web machine, making up with web second online manufacturing, and can further engage with the 3rd web online or that off-line is made.
According to still another embodiment of the invention, by method of the present invention, attached another web layer on the more coarse face of the single face web by condensation seasoning drying.Afterwards, this multi-layer fiber web can or be extruded to smooth by press polish.Bonding operation and smooth surface operation are preferably carried out in same process steps, and in this step, fiber web for example is pressed together in the metal tape crush zone (by using metal belt calender) in the hot extrude nip.
According to a scheme of the present invention, be attached at together by the more coarse face that makes web, and will engage by two webs that condensation drying (operation) is dried.And during engaging process, the humidity level along the z of web when distributing, moist surface is bonded together.
A scheme according to this embodiment of the present invention, make by the dry web of condensation seasoning (for example by condensing zone or Boostdryer drying) and contact with another web to be attached, and in this contact, the hot extrude nip mutual extrusion that web is extended makes web combine together.Can finish arbitrary of first web and the engaging of another web, but preferably engage at more coarse face.Preferably, first web is than second web drier (dry matter content 75-95%) and have bigger grammes per square metre.During pushing, the temperature on the wet sides (second web) is preferably greater than the temperature on the dried side (first web).Like this, moisture shifts from web (second web) to the border between web, and crosses the border and arrive another web (first web), finally is distributed in two webs and evenly to distribute.Advantageously, by selecting the dry matter content of web based on the ratio of the grammes per square metre of web, moisture distribution content will be near the final objective dry matter content, and very little or do not need further drying to the demand of further drying.
According to one embodiment of present invention, utilize the method according to this invention to produce stacked speciality paper.In this embodiment, function and/or intelligent element just have been positioned in (between each layer) in the structure in the fabrication stage.At the latest during the engaging process in conjunction with extruding before, function and/or intelligent element are arranged between those layers of multilayer web.These elements can be attached to the surface that will engage between engaged those webs in the fabrication stage early.Advantageously, a web is packing board (SBS cardboard or FBB cardboard) web, but also can use all different paper or cardboard type.
Function and intelligent element can be the indicants of the nondurable goods of indication oxygen, hydrogen sulfide, temperature or humidity; Can be the antibacterial material of capsule or powder type or the different chemical composition of preservative agent; The indicant of the indication mechanical stress of prepared Chinese ink pod membrane (ink capsule) and so on for example; The functional polymer of the polymer and so on of for example sensitization, luminous or conduction; Miniaturized component and the circuit of circuit, intelligent label and other radio communications of for example storage chip and so on that the electric conductivity printing ink by for example printing technology manufacturing provides and so on; The electromagnetism that magnetic printing ink by the printing technology manufacturing provides readable or the circuit and the parts that activate; (active or passive) circuit and parts of optical readable or activation, the material of the polymer of optically-variable, pigment and so on; The hologram of authentication thing, the laser readable of indication safety component (for example fuse), colored fibre, magnetic pattern, only by the visible structure of transmission; Rolling battery (power supply that the paper fiber is made) etc.
By just said elements being arranged in the fabrication stage in the fiber web between the different layers, this embodiment of the present invention has realized many significant advantages: these elements are sightless for the terminal use, have protected these elements not influenced by external factor; Just can not remove element as not destroying packing; Element is between the layer that is in the definite degree of depth, and in the time of when these element indicated temperatures, humidity or in optical plan (light weakens when advancing in fibre structure inside and scattering), this is important; The element of web inside does not influence the printing on surface; During manufacture process, simply and cheaply element can efficiently and economically be arranged to web on a large scale, lower unit cost (major defect of intelligent packaging part is the unit cost height, has therefore hindered the rapid expansion of this technology and use thereof) is provided thus.
In this embodiment, a plurality of functions and/or intelligent element can be arranged in layer structure with multitude of different ways during engaging stage of a plurality of layers: a plurality of component positionings are being treated on the inner surface of web of combination, made final its position be in the border between the stacked web; Utilize printing process, especially come manufacturing structure and pattern by digital printing and digital-code printer (printing ink, ink); Perhaps use machinery or electrostatic methods scattering, injection or arrangement; Shift by transitional surface (volume, band, drum) or by transfer foil, so that controlled structure to be provided; Apply by the coating process that uses suitable medium (water, paste, polymer or starch, wherein starch also provides adhesive); Element is mixed in the pulp suspension of one of them web.
Description of drawings
Followingly discuss the present invention in more detail with reference to accompanying drawing.
Fig. 1 schematically shows the example of the present invention for the manufacture of the multi-layer fiber web, and two-layer web is manufactured in this example.
Fig. 2 schematically shows another example of the present invention for the manufacture of the multi-layer fiber web, and two-layer web is manufactured in this example.
Fig. 3 schematically shows another example of the present invention for the manufacture of the multi-layer fiber web, and three layers of web are manufactured in this example.
Fig. 4 schematically shows another example of the present invention for the manufacture of the multi-layer fiber web, and three layers of web are manufactured in this example.
Fig. 5 schematically shows another example of the present invention for the manufacture of the multi-layer fiber web, and three layers of web are manufactured in this example.
Fig. 6 schematically shows the example of the present invention for the manufacture of the multi-layer fiber web, and three layers of web are manufactured in this example.
Fig. 7 A to Fig. 7 B schematically shows the layer structure of web.
Fig. 8 to Figure 10 schematically shows another example of the present invention for the manufacture of the multi-layer fiber web, and two-layer web is manufactured in this example.
Figure 11 to Figure 12 schematically shows another example of the present invention for the manufacture of the multi-layer fiber web, and wherein drying is incorporated in this method.
Figure 13 to Figure 15 schematically shows another example of the present invention for the manufacture of the multi-layer fiber web, in this example, is provided with a plurality of function element between the web layer.
The specific embodiment
In the following description, if not mention in addition, identical Reference numeral all refers to identical parts, and it should be understood that these examples are allowed and be modified, in order to be suitable for different purposes and situation in the scope of the present invention.
In the example according to Fig. 1, multi-layer fiber web MLW is made by two web W1, W2.Each web W1, W2 are sent to engagement device 10 by roller 9, and engagement device 10 comprises hot-rolling or cylinder 15 and has the metal tape 11 of deflector roll 12.Metal tape 11 is close to hot-rolling 15, forms the crush zone that guiding web W1, W2 pass through thus.Hot extrusion (operation) heating web W2, the water evaporates in the web, steam and heat deeper flow in the web, and arrive the border of web.Steam moves past the boundary layer to web W1.Under wet condition, fiber and natural polymer are softened and generate strong hydrogen bonding.This just makes web W2, W2 be bonded together, and obtains multilayer (two-layer) web MLW.If desired, multilayer web MLW will be led to apparatus for coating 25 to obtain the multilayer web CMLW of coating.The first web W1 in this example is cardboard web or paper web, and its dry matter content is preferably 70-95% before cohesive process.Second web that will be in face side in final products is the web that wets, and its dry matter content is 50-75%.The pressure of the crush zone between hot-rolling 15 and the metal tape 11 is about 0.1-2MPa, is preferably 0.1-0.5MPa.The multilayer web of manufacturing in the example of Fig. 1 has the coarse back side (upside among the figure) and smooth front (downside among the figure), also is fine conversely certainly.By utilizing suitable coating process, in apparatus for coating, optionally be coated with.In example of the present invention, if use the condensing zone technology, then the one side of multilayer web will be coarse, and use the metal tape technology, and then the two sides will all be smooth.
An example of the present invention has been shown among Fig. 2, and the crush zone that wherein is used for web W1, W2 are engaged to make multi-layer fiber web MLW is made of two metal tapes 11 and deflector roll 12 thereof.
An example of the present invention has been shown among Fig. 3, has wherein made three layers multi-layer fiber web by joint web W1, W2 and W3 in the engagement device 10 of the engagement device that is similar to Fig. 1.In this example, obtained double-sided multi-layer web MLW.Middle web W1 is drier, and can make with the paper pulp of the quality that is lower than surperficial web W2, W3.At crush zone, heat transmits from the two sides, and steam is driven to the border from surperficial web W2, W3 and deeper enter in the middle of the web W1.Heat and steam activate combination, and moisture content is uniformly distributed in all three layers at the latest after just leaving crush zone.The extruding that applies helps to set up fully in conjunction with contact.Shown in the layer partial, detailed view among Fig. 3, the quality of two superficial layer SL of multi-layer fiber web MLW is fine, and the quality of intermediate layer ML is comparatively cheap.
In the example of the present invention shown in Fig. 4, three layers multi-layer fiber web MLW is manufactured.The first web W1 is the web of doing, and second web is the web that wets, and they at first are engaged in engagement device 10, and make (one-sided) two-layer web of single face.Be that the 3rd web W3 that wets is engaged in reverse engagement device 10 afterwards, obtain three layers of fiber web that two surfaces all have high grade thus.In Fig. 4, engagement device 10 comprises hot-rolling or hot cylinder 15 and the cold metal band with deflector roll 12.
In the example of the present invention shown in Fig. 5, in the compact layout scheme of the machine that is suitable for for example having the finite length capacity, make the second best in quality three layers of fiber web in two sides.In this embodiment, engagement device 10 comprises the device for two crush zones.Roller 15 is cold, and metal tape 11 is hot.The first web W1 that does and the second wet web W2 are directed into for the crush zone that engages and engage and combination.Afterwards, this two-layer web is directed to second crush zone around roller with the 3rd wet web W3.Thus, produce the multi-layer fiber web with two superficial layer L2 and an intermediate layer L1.
Another embodiment of the present invention shown in Fig. 6.In this embodiment, engagement device 10 uses condensation zone (Condebelt-zone), and thermometal band and cold roller are formed for the district of the combination between each floor at this condensation zone.At first, make a two-layer web, and if required, can make the 3rd web W3 in second engagement device, be attached to this two-layer web, for example shown in Figure 1.Woollen blanket or net 16 are set to advance around cold roller 15, and another roller 17 are set so that woollen blanket or net loop to be set.On return path, can be provided for the burnisher of woollen blanket or net.
Fig. 7 A and Fig. 7 B schematically show the structure of each layer in crush zone and the condensation zone.In Fig. 7 A, two web layer L1, L2 are between thermometal treatment region H and cold metal treatment region C.Steam is transferred to a layer L1 from layer L2, and is uniformly distributed in during pushing in these layers, and the combination between each layer is activated by heat and steam during this period.The condensation zone has been shown among Fig. 7 B, wherein two web layer L1, L2 hot smooth metal band and have cold roller or the woollen blanket/net of cold metal band between.In this embodiment, web layer L2 wets, and web layer L1 be than doing, and steam is transferred to a layer L1 from layer L2, and the step of going forward side by side enters into woollen blanket or net, forms the combination that engages each layer during this period.In this embodiment, layer L1, L2 also can wet relatively.
In content shown in Figure 8, provide one at line process (online process).In this embodiment, it is manufactured to have a multi-layer fiber web of two layers.Web W1, W2 are joined together in online engagement device 10 then by online manufacturing.
In the embodiment of Fig. 9, its process engages the web W1 of online manufacturing with the web W2 of off-line (offline), web W2 is uncoiled from parent roll 20 before engagement device 10, and web W1, W2 are engaged in engagement device 10, and makes multi-layer fiber web MLW.Web W1, W2 can be uncoiled from parent roll 20, as with shown in the dotted line of the volume 20 that connect to be used for web W1.
Process of the present invention can constitute the combination of all different on-line: online-online, online-off-line, off-line-off-line, online-online-online, online-off-line-online, online-online-off-line, off-line-off-line-online etc.
In the example of Figure 10, by engaging the two-layer web that two web W1, W2 make single face, adopt suitable coating process to be coated with more coarse face by apparatus for coating 25 afterwards.Device 10 can be condensing zone or similar condensate dryer or metal tape device.
In the embodiments of the invention shown in Figure 11 and Figure 12, except engaging process according to the present invention, also use the condensation seasoning to carry out drying.
In the example shown in Figure 11, wet web W1 is sent to condensate dryer from press section, for example is sent to condensing zone or Boostdryer drying device 40, and obtains single face web W1.The downside R of the web among the figure is imprintable, and upside is printable shiny surface, and Bendt Bendtsen (Bendtsen) roughness is about 50-200ml/min.Another web W2 is engaged to more coarse downside.This web wets, and web W1, W2 are engaged in the engagement device 10 that is made of hot extrude nip (metal tape extruding), thereby produce the smooth symmetrical web in two sides.The Bendt Bendtsen roughness of the top side of multilayer web MLW is 50-200ml/min, and the roughness of downside also is 50-200ml/min.
In the example shown in Figure 12, board web W1 is dried in condensate dryer 40, makes the single face web thus.The one side of web (top side) is smooth, and another side (downside) is coarse (R).Wet web W2 is attached to the matsurface of the first web W1 in engagement device 10A then, and this engagement device 10A is made of hot extrude nip (metal tape extruding and/or condensing zone).Another wet web W3 is engaged to the upside of web W1, W2 in engagement device 10B, produce two sides printable multilayer web MLW.
Figure 13 shows to use with manufacturing to the example of Figure 15 has the related possibilities more of the present invention of " intelligent paper " (being fiber web) of function element.The process of Figure 13 is at line process.Figure 14 illustrates off-line/at line process, and figure 15 illustrates off-line procedure.
Be sent to press section 35A and in drying device 40, be dried from the paper pulp of head box 30A, thereby make as shown in figure 13 web W1.Be used to from the paper pulp manufacturing of head box 30B and in press section 35B, be extruded but another web W2 of not being dried, be engaged to web W1 by engagement device 10.Function element is applied to the downside of web W1 and/or the upside of another web W2 by installing 45, thereby function element is positioned at wait the borderline region of the multilayer web of batching parent roll 20.
In Figure 14, launch the first web W1 from parent roll 20A, the second web W2 is manufactured as illustrated in fig. 13.Function element is added into by installing 45 as among the embodiment of Figure 13.These function element also can be added into the web on the roller.Volume with function element is indicated by Reference numeral 20C.
In the example of Figure 15, launch two webs from parent roll 20A, 20B, by device 45 function element is joined contacted of two webs then, web W1, W2 are engaged in engagement device then, are batched parent roll 20C subsequently.
More than describe preferred embodiments more of the present invention and example, but can carry out multiple change to these embodiment and example.
Claims (15)
1. pass through two or more fiber webs (W1, W2, W3 ...) be bonded together to make the method for multi-layer fiber web, it is characterized in that, at least two web (W1 of extruding in the hot extrude nip of engagement device (10), W2, W3 ...), wherein by wet fiber web and another fiber web are pressed together, between a plurality of layers the web that forms multi-layer fiber web (MLW), form and combine closely.
2. method according to claim 1 is characterized in that, to be joinedly is extruded in the metal tape crush zone for a plurality of webs of a plurality of layers of multilayer web.
3. method according to claim 1 is characterized in that, to be joinedly is extruded in the condensing zone crush zone for a plurality of webs of a plurality of layers of multilayer web.
4. method according to claim 1 is characterized in that, the dry matter content of the borderline region of web to be joined is preferably 30-75% below 80%.
5. method according to claim 1, it is characterized in that, described web is extruded in the engagement device that comprises the metal tape crush zone (10), and described metal tape crush zone is by by the ferrule (11) of deflector roll (12) guiding be pressed against band or roller (15) or the cylinder formation of this metal tape (11).
6. method according to claim 1, it is characterized in that, in described method, described hot extrusion is heated one of a plurality of webs, water evaporation in this web, and in described method, steam and heat deeper flow in this web, arrive the border between the web, and form strong hydrogen bonding.
7. method according to claim 1, it is characterized in that, in described method, by in the thermometal zone of described engagement device (10), waiting to become a plurality of web (W1 of a plurality of layers of described multilayer web (MLW), W2, W3 ...) press together, and do not use any adhesive or analog, engage a plurality of webs of a plurality of layers waiting to become described multilayer web.
8. method according to claim 1 is characterized in that, in described method, and at least two web (W1, W2, W3 ...) be engaged at described crush zone, the side that the web that wherein wets engages is hot surface, and this hot surface is suitably 100-300 ℃, is preferably 120-150 ℃.
9. method according to claim 1 is characterized in that, in described crush zone, extrusion time is about 0.2 to 2s, is preferably 0.3-1s, and squeeze pressure is 0.05-0.2MPa, is preferably 0.1-0.5MPa.
10. method according to claim 1, it is characterized in that, first fiber web (W1) is by the manufacturing of fiber machine and to be dried to dry matter content be 70-95%, second web (W2) is by the manufacturing of fiber machine and to be dried to dry matter content be 50-75%, and by in long crush zone, described first fiber web and second web being pressed together, and make described second web (W2) be attached to described first web (W1).
11. method according to claim 1, it is characterized in that, make and have three layers multi-layer fiber web (W1) at least, for this reason, in the fiber machine, make a web as the intermediate layer of multilayer web, this web is dried to the dry matter content of 80-95%, two other web (W2, W3) manufactured and be dried to lower dry matter content in fiber web machine, and be attached to the web of doing (W1), make that (W2 W3) side by side or with two different phases is extruded on the middle web (W1) at described crush zone surperficial web.
12. method according to claim 1 is characterized in that, by using the condensation seasoning, to be joined be the multilayer web a plurality of webs (W1, W2, W3 ...) in one of them carries out drying at least.
13. method according to claim 1, it is characterized in that, to be joined is a plurality of web (W1 of a plurality of layers of multilayer web (MLW), W2, W3,) manufacturing a plurality of parent rolls (25) by one or more fiber web machine, described parent roll carries out being uncoiled before the engaging process in described engagement device (10).
14. method according to claim 1, it is characterized in that, before in described engagement device (10), carrying out combination and extruding during the engaging process, a plurality of functions and/or intelligent element (45) are placed between the layer of described multilayer web (MLW) at the latest.
15. according to claim 13 or 14 described methods, it is characterized in that, before web being wound into the parent roll that to provide as the web of one deck of multilayer web, a plurality of functions and/or intelligent element (45) are placed on the surface of this web, and described element (45) is arranged on the side of that web between the layer in the described multilayer web.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FI2010/050870 WO2012059619A1 (en) | 2010-11-01 | 2010-11-01 | Process for producing multilayer fiber web |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103189568A true CN103189568A (en) | 2013-07-03 |
Family
ID=44281093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800698916A Pending CN103189568A (en) | 2010-11-01 | 2010-11-01 | Process for producing multilayer fiber web |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2635741A1 (en) |
| CN (1) | CN103189568A (en) |
| WO (1) | WO2012059619A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111372545A (en) * | 2017-10-30 | 2020-07-03 | Gdm股份公司 | Apparatus and method for forming absorbent pad |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX2016002110A (en) | 2013-08-28 | 2016-06-28 | Kimberly Clark Co | Smooth bulky tissue. |
| AU2015389952B2 (en) | 2015-03-31 | 2020-06-11 | Kimberly-Clark Worldwide, Inc. | Smooth and bulky rolled tissue products |
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- 2010-11-01 EP EP10792953.1A patent/EP2635741A1/en not_active Withdrawn
- 2010-11-01 WO PCT/FI2010/050870 patent/WO2012059619A1/en active Application Filing
- 2010-11-01 CN CN2010800698916A patent/CN103189568A/en active Pending
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| US4112586A (en) * | 1975-12-30 | 1978-09-12 | Oy. Tampella Ab | Method of drying a cardboard or a paper web and drying device for applying this method |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2635741A1 (en) | 2013-09-11 |
| WO2012059619A1 (en) | 2012-05-10 |
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| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: Espoo, Finland Applicant after: Veimeide Technology Co., Ltd. Address before: Helsinki Applicant before: Metso Paper Inc. |
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Free format text: CORRECT: APPLICANT; FROM: METSO PAPER INC. TO: VEIMEIDE TECHNOLOGY CO., LTD. |
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Application publication date: 20130703 |