EP2576900A1 - Verfahren zur herstellung einer gestrichenen, mehrlagigen faserstoffbahn - Google Patents
Verfahren zur herstellung einer gestrichenen, mehrlagigen faserstoffbahnInfo
- Publication number
- EP2576900A1 EP2576900A1 EP11721321.5A EP11721321A EP2576900A1 EP 2576900 A1 EP2576900 A1 EP 2576900A1 EP 11721321 A EP11721321 A EP 11721321A EP 2576900 A1 EP2576900 A1 EP 2576900A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- fibrous web
- web
- coated
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000010410 layer Substances 0.000 claims abstract description 80
- 238000001035 drying Methods 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000004806 packaging method and process Methods 0.000 claims abstract description 15
- 239000011111 cardboard Substances 0.000 claims abstract description 10
- 239000011247 coating layer Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000012463 white pigment Substances 0.000 claims abstract description 4
- 239000000123 paper Substances 0.000 claims description 28
- 239000011248 coating agent Substances 0.000 claims description 25
- 238000000576 coating method Methods 0.000 claims description 25
- 229920001131 Pulp (paper) Polymers 0.000 claims description 24
- 238000009499 grossing Methods 0.000 claims description 20
- 239000000835 fiber Substances 0.000 claims description 17
- 239000010893 paper waste Substances 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 16
- 238000009833 condensation Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 239000002655 kraft paper Substances 0.000 claims description 10
- 239000002023 wood Substances 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 8
- 238000007766 curtain coating Methods 0.000 claims description 6
- 235000000391 Lepidium draba Nutrition 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000011087 paperboard Substances 0.000 abstract description 9
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 15
- 239000000126 substance Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000010790 dilution Methods 0.000 description 6
- 239000012895 dilution Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000010812 mixed waste Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 3
- 238000003490 calendering Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 102100031260 Acyl-coenzyme A thioesterase THEM4 Human genes 0.000 description 1
- 101000638510 Homo sapiens Acyl-coenzyme A thioesterase THEM4 Proteins 0.000 description 1
- 241000274582 Pycnanthus angolensis Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
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Classifications
-
- 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
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/0209—Wet presses with extended press nip
-
- 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
- D21F5/02—Drying on cylinders
- D21F5/04—Drying on cylinders on two or more drying cylinders
- D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
- D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over the cylinders
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/0066—Calenders; Smoothing apparatus using a special calendering belt
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/009—Apparatus for glaze-coating paper webs
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
-
- 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
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
-
- 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
Definitions
- the invention relates to a method for producing a coated, multi-layer fibrous web, in particular packaging paper or board web, in which first a stream is produced, which then successively at least one headbox, at least one wire section to form a multi-ply fibrous web, a press section, a dryer section with dryer groups and then fed to a reel.
- Cardboard and packaging papers are usually dried on their production in paper machines with drying cylinders of a single-row and / or double-row dryer section.
- optional suction elements especially for web stabilization available.
- a disadvantage is the high space requirement for such dryer sections and also to view the limited drying capacity. Especially with regard to the demanded, ever-increasing machine speeds, the drying zones must be formed longer relative to the overall machine length.
- the smoothness of the paperboard or packaging paper to be produced is usually produced in the production of paperboard using conventional calenders, such as hard-nip calenders with high maximum pressures and short residence times of the fibrous web in the nip.
- conventional calenders such as hard-nip calenders with high maximum pressures and short residence times of the fibrous web in the nip.
- the thickness loss of the web affects.
- Other conventional soft-nip calander smoothing processes use soft roll covers to increase the residence time in the nip. This is disadvantageous, the slight increase in smoothness and the volume loss.
- Other conventional smoothing methods, such as nip calendering or shoe straightening, use soft covers of the unheated roll. The disadvantage here is also a slight increase in smoothness with simultaneous loss of volume.
- the fibrous web or packaging paper or board web is also painted with a pigment coating. This achieves whiteness, smoothness, gloss and opacity of the web. Also, the printability of the web material is thereby increased, whereby it can serve as an information and advertising medium.
- the printing is done in addition to digital printing, especially in the form of offset printing and gravure printing.
- the fibrous web is painted on the cover side at least once.
- the reverse side may remain uncoated, or will also be painted at least once.
- coating amounts per side of up to 80g / m 2 are applied.
- the application has hitherto been carried out with conventional coating units, such as film presses, coaters with roller application (LDTA applicators with long exposure time of the coating medium), coater with free-jet nozzles, or with commissioned work with a short residence time of the medium on the web (so-called Short Dwell Time Applicators or SDTA ).
- the disadvantage is that only a limited application capacity and thus poor coverage and opacity of the fibrous web or packaging paper and board web can be achieved with these mentioned conventional order types. It is therefore an object of the invention to provide a method for producing a coated, multi-layer fibrous web, in particular packaging paper or board web, which does not have the disadvantages of the prior art.
- the multi-layer fibrous web is preformed with a belt calender and then coated the cover layer of the fibrous web by means of a curtain applicator with a white pigment-containing coating layer and then dried
- the inventors have found that with the specified pre-smoothing method, ie with a belt calender a smoother paper is produced than before, so what was done either without pre-smoothing or with other calenders.
- Strip smoothing according to the invention leads to better coverage of the white line layer subsequently applied with the curtain applicator. Due to the high smoothness of the web there is a much lower risk of demolition of the curtain during coating, even with low coating weights or low viscosity of the application medium used in curtain coating and high web speeds. This is considered a particular advantage of the invention. Incidentally, the smoothness of the web need only be present on one side before the coating, because the product resulting from the fibrous web produced is preferably only printed on one side.
- the band used in the pre-smoothing of the fibrous web consists of more than 70% of plastic. There is a temperature of more than 80 ° C. at the strip surface in contact with the fibrous web.
- Another advantage is that due to the white pigment-containing curtain coat, which is indeed very uniform and good coverage, only a low basis weight of white and expensive fiber layer (top layer) is needed, so you save expensive raw materials, without the lower fiber layers shine through and without that the print quality deteriorates.
- the method according to the invention makes it possible to produce the fibrous web in at least two layers, preferably at least three layers, namely backsheet, middle layer, top layer, depending on the desired application.
- white or bleached and / or deinked and / or wood-free fibers are provided, which are expensive. It is therefore all the more advantageous to be able to save these substances to a large extent because the described white coating layer is applied to the cover layer with the aid of a curtain coating. In certain cases (eg with white multiple lines) even the white top layer can be completely replaced with the white line layer.
- a curtain coater applies the application medium in the ratio 1: 1, that is, without excess to the running fibrous web in its production process.
- the at least one coating layer can be applied with a single- or multi-layered curtain applicator in the form of a slot die or a so-called slide die. It is expedient if a condensation press drying is provided within the pre-drying section. This could also be done after the drainage in the press section and / or in a post-dryer section. This offers the advantage of an increased evaporation rate of greater than 40 kg / m 2 h and the smoothing of the fibrous web.
- This type of drying should take place in a range in which the web has a solids content of more than 50% to about 90%, preferably more than 55%. At least such drying should therefore, as stated, preferably be carried out within the pre-drying section, and it is also conceivable to provide this also in the after-dryer section.
- the mentioned high rate of evaporation and smoothness is due to the fact that the fibrous web is guided with its one side over a preferably steam-heated cylinder and with its other side over a sieve and an overlying impermeable clothing. In this case, in this section, a contact pressure with respect to the cylinder is exerted with a pressure hood covering part of the outer circumference of the cylinder.
- a particular advantage is to be considered an improved heat transfer from the steam room of the drying cylinder to the fibrous web.
- the paper strength and the surface properties are increased despite the possible savings of raw fibers.
- the order of strength can be reduced, in some cases even completely saved.
- the production method according to the invention can be formed even more advantageously by feeding a fines into the head box at the beginning of the production process for the formation of the top layer of the multi-ply fibrous web. This achieves a very smooth cover layer, which forms a particularly good foundation for subsequent coating layer and which achieves a very even coverage of the fibrous web.
- the head box can be designed as a perforated roller headbox or as a hydraulic headbox.
- at least one headbox is equipped with dilution water control.
- the central layer is equipped with a dilution water control with the advantage that the basis weight cross profile of the entire board web can be influenced by the position with the largest proportion of the total weight (center layer) the strongest. Also conceivable is a multi-layer casserole which is fed with different material flows.
- wire section all known form combinations can be used. Preference is given to the use of wire mesh screens, but also combinations of long and seven hybrid formers, for example, the marketed by the company of the applicant Duo D or Duo DK as combinations of at least one Gapformern and at least one long screen use. It is advantageous if the said former is equipped with a Sieb thoroughlyel coupled, for example, with the marketed by the company of the Applicant Duo Shake. In the case of multi-layer concepts, this should preferably be provided for the layer with the highest bearing area weight, such as the middle ply.
- a tandem NipcoFlex press (TNFP) with offset press which is quadruple felted and / or a press unit, consisting for example of a suction press roll in the first nip, a NipcoFlex press in the second nip and find an offset press in the third nip use.
- the press concepts can be designed with closed or open web guide.
- the stiffening, ie the support frames for the presses can be performed as so-called cantilevers. It is also possible to use stitched or even seamless felts in the press section. Dry contents of up to 57% can be achieved with the mentioned press concepts.
- At least one smooth roller is used in the press section, which acts at least on the cover layer, which can by means of a known tandem press with three felts and a smooth roller, which is usually arranged below or with a so-called offset press, in which a nip is carried out without clothing, done.
- This measure also contributes to a smoother cover layer, which in turn can be coated more uniformly.
- condensation press smoothing works in a similar way to condensation press drying, whereby the fibrous web is passed over a heated cylinder and directly brought into contact with a metal belt running over the cylinder, above which a pressure hood is located. A sieve or a clothing is hereby not available.
- the cylinder (drying cylinder or smoothing cylinder) is preferably heated with steam, the cylinder surface reaching a temperature between 60 and 250 ° C., preferably 130 to 190 ° C.
- the method according to the invention can be further expedient if, following the curtain coating, the same side of the web is coated a second time with a conventional coating unit, such as a directly applied blade coater, and then the other side also coated with a conventional coater and then dried with dryers becomes.
- a conventional coating unit such as a directly applied blade coater
- the quality of the fibrous web produced it is when it is smoothed before reeling, so within a final group of the manufacturing machine.
- This calender has a heating roller, which is provided with a plastic jacket having a metallic coating with a thickness of ⁇ 200 ⁇ . This achieves an enormous increase in smoothness and an even better gloss.
- the fibrous web of a cooling group and then the reeling can be supplied.
- coated board in particular (FBB or folded box board or chromo or Chromoersatzkarton) or LPB (liquid packaging board or liquid carton) or coated packaging paper, in particular CWTTL (coated white top testliner) or CWTKL (coated white top kraft liner) with at least two layers produce.
- FBB folded box board or chromo or Chromoersatzkarton
- LPB liquid packaging board or liquid carton
- coated packaging paper in particular CWTTL (coated white top testliner) or CWTKL (coated white top kraft liner) with at least two layers produce.
- CWTTL coated white top testliner
- CWTKL coated white top kraft liner
- the cardboard or the paper three Layers, which consist of a fiber cover layer of bleached pulp, a middle layer of wood-containing raw material and / or recycled paper and a supine layer of bleached pulp or a mixture of bleached pulp with shares of wood-containing raw material, which also shares in waste paper material are added ,
- the cardboard or the paper has four layers.
- This protective layer consists either of waste paper pulp or a mixture of waste paper pulp and wood-containing raw material.
- the blanket is made of 100% bleached pulp, depending on the quality of the box, and is painted at least once.
- the insert, i. the middle days are light and consist of either 100% wood-containing raw material or shares of waste paper pulp are added.
- the back is bright and consists of either 100% bleached pulp or a blend of bleached pulp with levels of wood-containing raw material. It can also be added to the back shares of waste paper pulp.
- the reverse side can optionally be painted with at least one stroke. If used paper pulp can be optionally deinked in stock preparation. But there are also machines with four-layer concepts possible. Here, in addition to the three layers described, there is still a protective layer between the in or middle layer and the blanket. This protective layer consists either of waste paper pulp or of a mixture of waste paper pulp and wood-containing raw material.
- Folding boxboard is cardboard with a grammage in the range of 160 - 500 g / m 2 with the following characteristics
- the protective layer can consist of 100% recovered paper or optionally with shares of wood pulp. In principle, any mixing ratio is conceivable.
- the top layer may consist of 100% bleached pulp or 100% recycled paper pulp. But it is also possible the Make cover layer of a mixture of bleached pulp and waste paper pulp.
- the top layer can also be only slightly woody, although the wood pulp may be bleached or may be wood-free. The ceiling should always be painted.
- the insert usually consists of mixed waste paper pulp or optionally with proportions of mechanical pulp. Each mixing ratio is conceivable.
- the backside is made of recycled paper stock and may contain bleached and / or unbleached pulp.
- the back can either be painted or uncoated.
- qualities with the following abbreviation, with the number 1 indicating the variety with the highest quality.
- the total proportion of mixed waste paper pulp can be found in the following table
- customary used paper pulp fractions based on the total product are indicated therein.
- this multi-layer fibrous web or packaging paper or board web described above has a "white" fiber cover layer, which is subsequently provided with the white coating layer.
- the benefits of the process also include energy and resource savings.
- the process itself is characterized by an improvement in runnability (running properties).
- Figure 1 a representation of a process scheme for producing a multi-layer, coated fibrous web
- Figure 2 a schematic representation of the constant part for producing a
- FIG. 1 shows a process diagram of the production of a multilayer, coated paper or board web.
- the originating from a stock preparation stream S is supplied from a headbox 1 with a dilution water control a wire section I.
- the wire section consists of three longitudinal wires 2, 5 and 6 to form a multi-ply web B.
- the wire 2 is used to form a central layer, the wire 4 of the cover layer and the wire 4 is the back formed.
- the centerline wire 2 is equipped with a former 3 (traded by the Applicant Company under the name DuoFormer D) and with a sieve shaker 4 (traded by the applicant's company under the name Duo Shake).
- the substance of the individual layers is sprayed from the corresponding headboxes 1, 1 a onto the respective longitudinal sieves 2, 5, 6 and dewatered thereon. At the points of contact of the Langsiebe the layers are vergautscht together.
- the layer structure is from bottom to top as follows:
- the web B is then successively dewatered by drainage elements in the wire section until it has a dry content of> 16% at the end of the wire section I.
- the press section II with presses 7 consists of a double-felted suction press roller 7.1 in the first nip and a double-felted suction press roller 7.1. Press Nipco Flex Press 7.2 in the second nip and an offset press 7.3 in the third nip.
- web B After press section II, web B reaches dry contents of up to 57%.
- This pressing concept can be carried out with closed or open web guide.
- the stasis can also be designed as a cantilever. It is possible to use seamed or seamless felts in the press section II
- This technology used here is particularly energy-efficient, since in addition to the high specific evaporation of more than 40 kg / m 2 h and a significant increase in smoothness of the packaging paper or cardboard takes place within the dryer section hood.
- Preferred installation position of this condensation press dryer is in a range above 50% to about 90% dry content, but mainly above 55% dry content.
- the integration of one or more such drying units is preferably carried out in the pre-drying section III, but it is also conceivable to provide such units in a subsequent after-dryer section.
- the condensation press dryer 9 offers the advantage of increased evaporation rates and paper smoothing.
- drying units 9 can be installed in "line", ie at the level of the conventional dryer section as well as in the machine cellar Advantage of the installation in the machine cellar is that the drying unit 9 can be taken out of line and the drying process only with a conventional dryer section Moreover, it is possible for existing machines which are drying-limited to increase production by installing one or more drying units 9. by replacing conventional drying cylinders.
- a band calender is used as calender 13.
- This belt calender has a single-layer or multi-layer belt or belt with coating on the facing fibrous web side.
- the band consists predominantly, i. more than 70% plastic.
- the temperature of the calender is more than 80 ° C at the belt surface when the belt is in contact with the fibrous web. This achieves a very volume-saving and excellent smoothness.
- calender 13 for after-smoothing the coated web B.
- Preferred mounting position of a calender for pre-smoothing is in a range of about 55% to about 90% dry content, but mainly about 60% dry content of the web.
- a white line is first applied to the white cover layer of the fibrous web B.
- a non-contact coating unit 14 in the form of a curtain applicator 14.1 (curtain coater), which is a slot (slot) or Gleit Hardüse (slide the) has.
- curtain applicator 14.1 curtain coater
- coating composition containing particularly high amounts of even very uniformly white pigments is applied even at elevated speeds and a particularly good coverage and thus surface quality are achieved.
- An embodiment of such a curtain applicator with a slot die extending over the width of the fibrous web, from which the curtain is discharged downwards essentially in accordance with gravity, is described in WO-A1-006 / 0973676.
- Another possible embodiment of a curtain applicator work is known from EP A1 - 1 255 615 and is referred to in professional circles as "slide the", ie Gleit Mrsdüse.
- the cover layer is painted a second time with a conventional coating unit 15.
- a conventional coating unit 16 is also coated with a conventional coating unit 16.
- Conventional coating units 15 and 16 are e.g. a free-jet nozzle assembly, which is followed by a doctor blade element or a coating unit with a short residence time (SDTA) or otherwise known doctor blade applicator in question.
- SDTA short residence time
- Each of a coater close unspecified contactless dryer, i. Air dryer and infrared dryer on.
- a subsequent correction group 17 the top side and the bottom side of the web B-ie the top layer and the back-are heated to different degrees, which reduces the curl of the web (curl).
- This correction group 17 consists of a conventional one or two-row drying group (in the example, the drying cylinders are arranged in two rows), which are equipped with or without dryer fabrics at the top and bottom.
- the correction group 17 is equipped with 2 drying screens one for the upper and one for the lower row of drying cylinders.
- the upper and lower drying cylinders within the correction group are heated so that the cylinder surface temperatures differ by at least 10 ° C.
- the web is nachkalandriert in a calender 18.
- a Softnipkalander is used to create a particularly high gloss effect of the finished paper or cardboard and the micro-roughness is reduced.
- Such a calender has a heated roll with a plastic jacket which is provided with a metallic layer on.
- the thickness of the plastic sheath is about 5 to 50mm and the metallic layer is about 5 to 100 ⁇ thick.
- a cover layer on an elastic roller is disclosed, for example, in DE 10 2008 037 999 A1.
- the cooling group 19 is felted in the example shown below.
- the advantage of this is that the upper surface of the web B smoothed in the SoftnipKalander 18 no longer comes into contact with the wire and, as a result, the gloss effect is retained.
- the arrangement of the cooling group 19 before the reeling 20 - as shown in Figure 1 - has the advantage that the thermal change in length of the web is reduced to the scooter, whereby better winding properties are achieved.
- For reeling 20 is to be added that also configurations of scooters with center drive are conceivable. Compared to scooters without center drive Finer settings of the winding properties can be achieved.
- FIG. 2 schematically shows the production of the substance mixture for producing the fibrous web.
- the above example sketch refers to a constant part of a web-making machine or system in which the top ply, the middle ply and the back ply consist of 100% virgin fiber. Therefore, a cleaner stage is provided in the respective material strand, since this is not provided in the stock preparation.
- the material stream S coming from the stock preparation is premixed in a mixer 30 (ComMix) together with the white water, if appropriate also with additives, for example retention agents.
- the scrap is preferably mixed into the machine chest of the Middle Ply. It is also conceivable that the committee in the ComMix of Top Ply or Back Ply is led.
- the suspension is mixed with white water in a further mixer 31, a so-called Hydromix.
- the concentration of the stock suspension after the Hydromix is higher than the concentration of the headbox, with the advantage that a smaller number of assemblies can be selected for the subsequent cleaner 32 (Cleaner or EcoMizer). Small impurities, eg fine sand, are removed in this cleaning device 32.
- a further dilution with white water to the desired headbox concentration and optionally a mixture with additives Through a headbox 34, the suspension for the destruction of fiber flakes and for final cleaning through a cleaning screen 35 (HB Screen, MSA, MST, MSS) out.
- a cleaning screen 35 HB Screen, MSA, MST, MSS
- a reduction of Stoffpulsa- tions whereby substance fluctuations in the headbox 36 are avoided in the machine direction.
- the necessary amount of retention agent 37 can be added before the headbox 36 of the stock suspension.
- the water required for the dilution water control at the headbox 36a of the middle layer is taken from a white water channel and after being processed in a device 38 in FIG a sifter led to the headbox.
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010029617A DE102010029617A1 (de) | 2010-06-02 | 2010-06-02 | Verfahren zur Herstellung einer gestrichenen, mehrlagigen Faserstoffbahn |
PCT/EP2011/058532 WO2011151234A1 (de) | 2010-06-02 | 2011-05-25 | Verfahren zur herstellung einer gestrichenen, mehrlagigen faserstoffbahn |
Publications (3)
Publication Number | Publication Date |
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EP2576900A1 true EP2576900A1 (de) | 2013-04-10 |
EP2576900B1 EP2576900B1 (de) | 2015-11-04 |
EP2576900B2 EP2576900B2 (de) | 2021-02-17 |
Family
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Application Number | Title | Priority Date | Filing Date |
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EP11721321.5A Active EP2576900B2 (de) | 2010-06-02 | 2011-05-25 | Verfahren zur herstellung einer gestrichenen, mehrlagigen faserstoffbahn |
Country Status (4)
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EP (1) | EP2576900B2 (de) |
CN (1) | CN103109018B (de) |
DE (1) | DE102010029617A1 (de) |
WO (1) | WO2011151234A1 (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010038530A1 (de) | 2010-07-28 | 2012-02-02 | Voith Patent Gmbh | Verfahren zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn |
FI126699B (en) * | 2014-05-15 | 2017-04-13 | Metsä Board Oyj | Process for making cardboard |
CN106414844B (zh) * | 2014-06-06 | 2020-01-17 | 福伊特专利有限公司 | 用于制造纤维幅面的设备 |
CN106471185B (zh) * | 2014-07-02 | 2019-01-18 | 福伊特专利有限公司 | 制造液体包装板的方法、用于制造液体包装板的设备和通过该方法制造的液体包装板 |
CN104213476B (zh) * | 2014-08-18 | 2016-08-31 | 湖北欧华达纤维科技股份有限公司 | 高密度环保再生纤维板及其生产方法 |
CN105926340A (zh) * | 2016-06-20 | 2016-09-07 | 山东天阳纸业有限公司 | 一种应用于热升华原纸的干燥设备及干燥工艺 |
AT519242B1 (de) * | 2017-02-03 | 2018-05-15 | Andritz Ag Maschf | Verfahren zur herstellung einer mehrlagigen faserstoffbahn mit weisser decklage |
CN106968124B (zh) * | 2017-03-20 | 2018-09-28 | 东莞市白天鹅纸业有限公司 | 一种生活用纸的制备方法 |
CN110446811B (zh) * | 2017-03-21 | 2021-06-04 | 福伊特专利有限公司 | 幅面处理 |
EP3502348B1 (de) * | 2017-12-21 | 2020-06-24 | BillerudKorsnäs AB | Faserfraktionierung |
CN116575253A (zh) * | 2018-01-05 | 2023-08-11 | 国际纸业公司 | 具有增加的弯曲刚度和横向强度的纸产品及其制造方法 |
EP3540119B1 (de) * | 2018-03-15 | 2023-08-02 | Valmet Technologies Oy | Faserbahnmaschine und verfahren zur herstellung einer mehrlagigen bahn |
EP3540118B1 (de) * | 2018-03-15 | 2022-11-23 | Valmet Technologies Oy | Faserbahnmaschine und verfahren zur herstellung einer mehrlagigen bahn |
DE102018121155A1 (de) * | 2018-08-30 | 2020-03-05 | Voith Patent Gmbh | Verfahren und maschine zur herstellung einer mehrlagigen faserstoffbahn |
DE102019134177A1 (de) * | 2019-12-12 | 2021-06-17 | Voith Patent Gmbh | Maschine und Verfahren zur Herstellung einer Faserstoffbahn |
DE102020106095A1 (de) * | 2020-03-06 | 2021-09-09 | Voith Patent Gmbh | Verfahren zu Beschichtung einer Faserstoffbahn |
AT524998B1 (de) * | 2021-04-21 | 2023-02-15 | Mondi Ag | Bedruckbares, mehrlagiges Papier für Verpackungen und Verfahren zu dessen Herstellung |
CN113584946A (zh) * | 2021-06-21 | 2021-11-02 | 宁波亚洲浆纸业有限公司 | 铜卡纸及其制造方法 |
DE102022107202A1 (de) * | 2022-03-28 | 2023-09-28 | Voith Patent Gmbh | Mehrlagenfaserstoffbahn |
AT526619A1 (de) * | 2022-11-08 | 2024-05-15 | Mondi Ag | Verfahren zur Herstellung einer bedruckbaren Linerbahn für Verpackungen sowie bedruckbarer Liner für Verpackungen |
AT526620A1 (de) * | 2022-11-08 | 2024-05-15 | Mondi Ag | Verfahren zur Herstellung einer bedruckbaren Linerbahn für Verpackungen sowie bedruckbarer Liner für Verpackungen |
EP4382662A1 (de) * | 2022-12-05 | 2024-06-12 | Billerud Aktiebolag (publ) | Verfahren zur herstellung einer mehrlagigen pappe |
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DE202009011396U1 (de) | 2008-09-02 | 2009-11-26 | Metso Paper, Inc. | Eine in eine Papier-/Kartonmaschine integrierte Streich- und Kalandrierungsanlage |
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DE19526205C2 (de) | 1995-07-18 | 2000-08-17 | Voith Sulzer Stoffaufbereitung | Verfahren und Anlage zur Herstellung einer mehrlagigen Papier- oder Kartonbahn |
DE19703466A1 (de) | 1997-01-31 | 1998-08-06 | Voith Sulzer Papiermasch Gmbh | Mehrschichtiges Papier |
DE19723163A1 (de) | 1997-06-03 | 1998-12-10 | Voith Sulzer Papiermasch Gmbh | Trockenpartie |
SE515824C2 (sv) | 2000-01-26 | 2001-10-15 | Tetra Laval Holdings & Finance | Förfarande för tillverkning av ett flerskiktat förpackningslaminat genom våtbeläggning, samt laminat tillverkat enligt förfarandet |
DE10032500A1 (de) | 2000-07-04 | 2002-01-17 | Voith Paper Patent Gmbh | Auftragsvorrichtung |
EP1249533A1 (de) * | 2001-04-14 | 2002-10-16 | The Dow Chemical Company | Verfahren zur Herstellung von mehrschichtig beschichtetem Papier oder Pappe |
FI124698B (fi) | 2004-01-15 | 2014-12-15 | Valmet Technologies Inc | Sovitelma paperikoneessa |
FI115655B (fi) | 2004-02-25 | 2005-06-15 | Metso Paper Inc | Menetelmä paperi-/kartonkirainan päällystämiseksi |
DE102004017807A1 (de) | 2004-04-13 | 2005-10-27 | Voith Paper Patent Gmbh | Trockenanordnung |
FI20045321A (fi) * | 2004-09-02 | 2006-03-03 | Metso Paper Inc | Metallihihnakierrolla varustettu kuiturainan käsittelylaite |
US20060149127A1 (en) | 2004-12-30 | 2006-07-06 | Seddiqui Fred R | Disposable multi-lumen catheter with reusable stylet |
DE102008037999A1 (de) * | 2008-08-16 | 2010-02-18 | Voith Patent Gmbh | Verfahren zum Herstellen einer Kalanderwalze und Kalanderwalze |
FI20085782L (fi) | 2008-08-22 | 2010-02-23 | Metso Paper Inc | Kartonkikone |
-
2010
- 2010-06-02 DE DE102010029617A patent/DE102010029617A1/de not_active Withdrawn
-
2011
- 2011-05-25 EP EP11721321.5A patent/EP2576900B2/de active Active
- 2011-05-25 WO PCT/EP2011/058532 patent/WO2011151234A1/de active Application Filing
- 2011-05-25 CN CN201180038366.2A patent/CN103109018B/zh active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE202009011396U1 (de) | 2008-09-02 | 2009-11-26 | Metso Paper, Inc. | Eine in eine Papier-/Kartonmaschine integrierte Streich- und Kalandrierungsanlage |
Non-Patent Citations (1)
Title |
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See also references of WO2011151234A1 |
Also Published As
Publication number | Publication date |
---|---|
DE102010029617A1 (de) | 2011-12-08 |
CN103109018B (zh) | 2016-03-02 |
EP2576900B1 (de) | 2015-11-04 |
CN103109018A (zh) | 2013-05-15 |
EP2576900B2 (de) | 2021-02-17 |
WO2011151234A1 (de) | 2011-12-08 |
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