EP3020525B1 - Verfahren und anlage zur herstellung von platten aus altpapier - Google Patents

Verfahren und anlage zur herstellung von platten aus altpapier Download PDF

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Publication number
EP3020525B1
EP3020525B1 EP15194360.2A EP15194360A EP3020525B1 EP 3020525 B1 EP3020525 B1 EP 3020525B1 EP 15194360 A EP15194360 A EP 15194360A EP 3020525 B1 EP3020525 B1 EP 3020525B1
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EP
European Patent Office
Prior art keywords
liquid
layer
onto
support
group
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EP15194360.2A
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English (en)
French (fr)
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EP3020525A1 (de
Inventor
Guido Giovanni Locati
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Seccarta Srl
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Seccarta Srl
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B27N1/0263—Mixing the material with binding agent by spraying the agent on the falling material, e.g. with the material sliding along an inclined surface, using rotating elements or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/06—Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone

Definitions

  • the present invention refers to a process for producing panels made from waste paper.
  • the present invention also refers to a plant for producing panels made from waste paper.
  • waste paper it is meant to indicate paper, solid board, corrugated cardboard and the like deriving from industrial or domestic waste.
  • the woody formed article is produced by admixing a woody material and, as a binding agent, a fibrous and/or ribbon shaped thermoplastic resin, preferably at the heated and melted stated, and molding the resultant mixture.
  • the waste paper is ground and chopped until an incoherent mass of particles is obtained, the particles having average dimensions of less than 7mm and, generally, comprised between 2mm and 5mm.
  • This incoherent mass is distributed onto a support, in practice consisting of a conveyor belt, so as to form a layer of substantially uniform thickness.
  • a liquid generally consisting of water and glue, is then sprayed onto the layer thus obtained.
  • the layer thus sprayed is then subjected to a compacting compression at pressure values equal to at least 19.6 MPa (200 kg/cm 2 ) and, preferably, comprised between 29.4 MPa (300 kg/cm 2 ) and 49 MPa (500 kg/cm 2 ).
  • a second layer of incoherent mass is deposited onto the first layer.
  • the sheet After pressing, the sheet is air-dried or dried in a possible drier.
  • EP1232048B1 describes a process and a plant for producing stiff paper or paperboard sheets from waste paper, wherein after the compacting compression step the sheet is subjected to a second pressing at which it is simultaneous formed with a plurality of recesses creating stiffening corrugations.
  • the paper or paperboard sheets obtained according to what is described in EP0990069B1 have been the object of in-house experiments carried out by the owner and aimed at evaluating, in particular, the heat and sound insulation characteristics thereof to verify the possibility of using it in the building field as components of vertical and horizontal partitions and of insulation coatings.
  • the Applicant has, therefore, surprisingly found that by modifying the process parameters, on the other hand, it is possible to obtain panels made from waste paper that have both mechanical characteristics and heat and sound insulation characteristics that make them particularly suitable for making thermic insulations and soundproofings.
  • the object of the present invention is a process and a plant for producing panels made from waste paper that make it possible to obtain panels having mechanical characteristics and both heat and sound insulation characteristics that make them particularly suitable for making thermic insulations and soundproofings.
  • the process and the plant for producing panels made from waste paper object of the present invention make it possible to obtain panels that have a relatively low thickness and low average density and that have sound and heat insulation characteristics that are comparable, if not better, than those of known insulating panels currently available on the market.
  • the process and the plant for producing panels made from waste paper object of the present invention make it possible to obtain, with low costs, panels usable, also by themselves, in particular, in building for making vertical and horizontal partitions and coatings of external walls of buildings that are new or undergoing renovation.
  • the object of the present invention is therefore a process for producing panels made from waste paper according to claim 1.
  • the incoherent mass consists solely of particles of waste paper.
  • step a1) consisting of wetting the support with a second liquid.
  • a step a0) consisting of depositing a first continuous sheet of paper onto the support.
  • a step a1' consisting of wetting the first sheet deposited on the support with a second liquid before the incoherent mass is deposited onto the first sheet, thus wetted, to form said layer.
  • step b1) consisting of wetting the surface of the layer - which was formed in said step b) - opposite that resting on said support with a third liquid.
  • step b2) consisting of depositing a second continuous sheet of paper onto the surface of the layer - which was formed in step b) - opposite that resting on said support.
  • step b1) if present, is carried out before step b2); i.e. the surface of the layer formed in step b) which is opposite that resting on the support is wetted with the third liquid before the second continuous sheet of paper is deposited on it.
  • the pressure applied during step c) is comprised between 20 kg/cm 2 (1.96 MPa) and 70 kg/cm 2 (6.86 MPa) and, preferably, it is comprised between 30 kg/cm 2 (2.94 MPa) and 50 kg/cm 2 (4.9 MPa).
  • Step a) takes place by grinding or in any case crumbling or shredding of pieces of waste paper into particles of average dimensions of the order of a few millimetre units.
  • the particles have average dimensions comprised between 4 mm and 10 mm and preferably comprised between 5 mm and 7 mm.
  • particles is meant to indicate fragments or small pieces of waste paper that, as already indicated above, have average dimensions of the order of a millimetre or a few units of millimetres and less than ten millimetres. Such “particles” should not therefore be confused with or considered as cellulose fibres that make up paper or paperboard.
  • incoherent mass is meant to indicate a group of particles, comprising the particles of waste paper, not mutually cohesive or in any case joined.
  • the incoherent mass consists of only particles of waste paper.
  • waste paper is meant to indicate paper, solid board, corrugated cardboard or similar deriving from industrial or domestic waste.
  • Step b) takes place by letting the incoherent mass fall from a greater height than that of the support onto the support itself.
  • Step b) therefore, takes place by distributing by "sprinkling" the incoherent mass onto the support so as to form a layer of substantially uniform thickness.
  • Such a layer has, in a preferred embodiment, a thickness S1 comprised between 30 mm and 100 mm and, even more preferably, comprised between 50 mm and 80 mm.
  • a first liquid is sprayed onto the incoherent mass, into the incoherent mass or in any case so as to cover the entire incoherent mass penetrating and distributing into the incoherent mass before the latter forms the layer of thickness S1 (hereinafter also indicated as “layer S” or “layer S1").
  • Such a first liquid is sprayed onto the incoherent mass, into the incoherent mass or in any case so as to cover the entire incoherent mass while said mass is deposited onto the support and before said mass forms the layer of thickness S1.
  • Such a first liquid is sprayed onto the incoherent mass, into the incoherent mass or in any case so as to cover the entire incoherent mass while the latter is falling onto the support and so that said first liquid is distributed into the incoherent mass both along a direction that passes through such an incoherent mass along the dimension thereof that forms the thickness S1 of the layer S and along a direction that forms the width of such a same layer.
  • such a first liquid is sprayed so as to form one or more jets directed along at least one direction having a component parallel to the laying plane of the support itself.
  • such a first liquid is sprayed so as to form one or more jets each of which propagates along a direction that passes through the incoherent mass along the dimension thereof that forms the thickness S1 of the layer and/or along a direction that forms the width of such a same layer.
  • Each jet can be of different shapes: “sprinkling", “sheets” or other and can hit the incoherent mass falling onto the support from the outside (i.e. laterally) or from inside it.
  • the number of such jets can vary as a function of their shape and size.
  • the first liquid is sprayed so as to cover the entire incoherent mass and be distributed into it in a substantially uniform manner.
  • Steps a1) and a1') comprise applying the second liquid, respectively, directly onto the support or onto the first sheet, through spraying or nebulization in one or more jets so as to distribute it substantially uniformly over the entire portion of the surface, respectively, of the support or of the first sheet on which the layer S1 is subsequently deposited.
  • such jets are directed transversally, advantageously orthogonally, to the plane defined by the support or by the first sheet resting on it.
  • jets can be of various shapes: “sprinkling", “sheets” or other.
  • the number of such jets can vary as a function of their shape and sizes.
  • step b1) comprises applying the third liquid directly onto the face of the layer S1 opposite that resting on the support, through spraying or nebulization in one or more jets so as to distribute it substantially uniformly over the entire portion of the surface of the layer S1.
  • such jets are directed transversally, advantageously orthogonally, to the plane defined by the layer S1 (i.e. by the support).
  • jets can be of various shapes: “sprinkling", “sheets” or other.
  • the number of such jets can vary as a function of their shape and sizes.
  • the first sheet and the second sheet of paper if present, each have a "weight" (grammage) comprised between 35 gr/m 2 and 100 gr/m 2 , preferably equal to 50 gr/m 2 .
  • the first liquid, the second liquid and the third liquid are the same or different from each other.
  • the first liquid, the second liquid and the third liquid are equal to each other.
  • the first liquid, the second liquid and the third liquid each comprise water and a glue in proportions comprised, respectively, between 20% and 40% (water) and between 80% and 60% (glue), advantageously equal to 30% water and 70% glue, as a function of or excluding the percentage of water or humidity possibly present in the glue in the form in which it is commercialised.
  • the glue is, for example, a silicate-based glue, of the silicate type and, in particular, of the sodium-silicate type.
  • the first liquid, the second liquid and the third liquid each consist solely of water and a glue in the proportions indicated above, in which the glue is preferably silicate-based and even more preferably of the sodium-silicate type.
  • the first liquid, the second liquid and the third liquid are sprayed as such, respectively, into or through the incoherent mass, onto the support or onto the first sheet of paper and onto the upper surface of the layer of particles deposited.
  • the quantities, per unit surface of the layer S1 or in any case of the final panel, respectively of the first liquid, of the second liquid and of the third liquid are the same or different from each other.
  • the quantities, per unit surface of the layer S1 or in any case of the final panel, respectively of the first liquid, of the second liquid and of the third liquid are equal to each other.
  • the first liquid, the second liquid and the third liquid are equal to each other and comprise water and a glue and the quantities, per unit surface of the layer S1 or in any case of the final panel, respectively of the first liquid, of the second liquid and of the third liquid are equal to each other.
  • the total quantity of liquid applied overall per unit surface of final panel is divided into three equal fractions: one third is sprayed onto the support or onto the first sheet in step a1) or a1'), one third is sprayed into the incoherent mass in step b) and one third is sprayed onto the surface of the layer S1.
  • the overall quantity of the first liquid, of the second liquid and of the third liquid is comprised between 0.5 kg/m 2 and 1 kg/m 2 of final panel and preferably equal to 0.7 kg/m 2 .
  • the layer S1 is subjected to a compression action at a pressure comprised between 20 kg/cm 2 (1.96 MPa) and 70 kg/cm 2 (6.86 MPa) and, preferably, comprised between 30 kg/cm 2 (2.94 MPa) and 50 kg/cm 2 (4.9 MPa).
  • the layer S1 undergoes a reduction in thickness; the thickness S2 of such a layer after step c) is equal to about 1/10 of S1.
  • the layer S2 obtained with step c) is cut into single panels and left to air-dry.
  • step c) there is provided at least one further step of processing the layer S2, like, for example, a surface finishing step, a step of application onto its opposite faces of further layers of heat and/or sound insulating materials such as, for example, bands of felt or nonwoven fabric (NWF) made of recycled polypropylene (PP) or other material and/or of stamping of indentations or corrugations.
  • a further step of processing the layer S2 like, for example, a surface finishing step, a step of application onto its opposite faces of further layers of heat and/or sound insulating materials such as, for example, bands of felt or nonwoven fabric (NWF) made of recycled polypropylene (PP) or other material and/or of stamping of indentations or corrugations.
  • NWF nonwoven fabric
  • PP recycled polypropylene
  • Such further processings can also be carried out on the single panels cut from the layer S2.
  • the layer S2 or the panels obtained from it are subjected to an indentation machining aimed at stamping a plurality of discreet indentations in them.
  • the indented panels thus obtained are particularly suitable for making floor insulation or in any case horizontal partitions; the indentations, indeed, make discrete contact points with the slab that minimise the transfer of vibrations and, therefore, contribute to better soundproofing.
  • Figures 2 to 4 show schematic section views of different possible panels obtained with a process according to the present invention.
  • a panel obtainable with the process object of the present invention is indicated with P1, P2 and P3.
  • the panel P1 ( figure 2 ) consists of only the layer of incoherent mass and, generally, has a thickness S2 comprised between 5 mm and 10 mm and weight comprised between 2 kg/m 2 and 3.5 kg/m 2 .
  • the innermost portion of the panel P has a substantially "sponge-like" configuration of lower average density than that of the outermost surface portions thereof.
  • outermost surface portions is meant to indicate the portions of the panel that define the opposite faces thereof and that each have a thickness S4
  • S2 is less than S1 and S3 is equal to about 60% of S2 and S4 is equal to about 20% of S2.
  • the density of the innermost portion S3 and of the outermost surface portions S4 is not uniform (i.e. constant in their entire thickness); the density of the panel P1, indeed, varies along its thickness and, in particular, it should be noted that its density increases starting from the centre towards the outside thereof along a direction orthogonal to the opposite faces thereof.
  • the surface application of the second and third liquid contributes to creating the two outermost surface portions S4 with greater average density and compacting.
  • the application of a pressure comprised between 20 kg/cm 2 (1.96 MPa) and 70 kg/cm 2 (6.86 MPa) and, preferably, comprised between 30 kg/cm 2 (2.94 MPa) and 50 kg/cm 2 (4.9 MPa), cooperates synergically with the application of the first liquid and of the possible second and third liquid in obtaining a panel P1 with a stratified and diversified structure, in particular with variable density along the thickness, as described above.
  • the elastic yield of the panel P1 considered along a direction orthogonal to its faces is greater at its central portion S3 and lesser at the outermost surface portions S4 thereof. Overall, therefore, the panel P1 behaves like a "spring"; it is thought that such a structure contributes to giving the panel P1 soundproofing characteristics.
  • the panel P2 differs from the panel P1 solely in that its two opposite faces are respectively covered with a first sheet F1 and a second sheet F2 of paper.
  • the panel P3 is like the panel P2 at the opposite faces of which respective layers T1 and T2 of felt or nonwoven fabric (NWF) made of recycled polypropylene (PP) or other insulating material have been applied, for example by gluing.
  • NWF felt or nonwoven fabric
  • PP recycled polypropylene
  • a plant 10 for producing a panel according to the present invention will now be illustrated as a non-limiting example.
  • the plant 10 is suitable for continuously producing panels according to the present invention which is defined in claim 7.
  • the plant 10 comprises:
  • the plant 10 also comprises:
  • the support 13 advantageously consists of a plane that is mobile along an advancement direction and sense and, for example, consists of the upper branch of a continuous conveyor belt that is drawn in motion by a pair of pulleys 18 as indicated by the arrows shown in figure 1 .
  • upstream and downstream arrangement refers to the advancement sense of the upper branch of such a conveyor belt.
  • the plant 10 comprises, upstream of the distribution group 12, a first deposition group 19 for depositing a first continuous sheet F1 of paper onto the support 13 before the incoherent mass M is deposited onto it and the layer S forms.
  • the first sheet F1 is laid onto the support 13 before the second liquid L2 is applied onto it, which, therefore, is applied onto the first sheet F1.
  • the second group 20 is arranged downstream of the third spraying group 17, in which case, therefore, the third liquid L3 is applied on the upper surface of the layer S before the second sheet F2 is deposited onto it.
  • a cutting group 21 is arranged for obtaining a plurality of panels that are then collected in piles in a collection station 22.
  • the formation group 11 comprises means for grinding waste paper collected in accumulators 23.
  • Such grinding means can consist of rotary toothed drums or other chipping and cutting systems.
  • Such a formation group 11 reduces the paper and/or paperboard into particles of average dimensions comprised between 4 mm and 10 mm and preferably comprised between 5 mm and 7 mm.
  • the particles thus formed are conveyed, for example by means of conveyors 24, to the distribution group 12.
  • the latter comprises a hopper 25 in which means 26 for mixing or in any case agitating the incoherent mass M are housed.
  • the bottom of the hopper 25 is arranged above the support 13 and at a greater height with respect to it.
  • dosing means 27 are arranged - for example of the type of a rotary drum equipped on its outer side surface with toothings, grooves or brushes - which dose the incoherent mass M distributing it onto the support 13.
  • the incoherent mass M falls from above onto the support 13 on which it collects to form the layer S.
  • the first spraying group 15 is arranged and configured to generate at least one jet of the first liquid L1 that is directed along at least one direction having a component parallel to the laying plane of the support 13 and that engages the incoherent mass M while it is falling onto the support 13 and before it forms the layer S thus being distributed inside it.
  • the first spraying group 15 can be arranged outside of the incoherent mass M coming out from the distribution group 12 and, in particular, laterally and upstream of it, or inside it.
  • the first spraying group 15 can consist of one or more nozzles generating jets in "sprinkled", “sheet” or other shapes.
  • Such nozzles are in any case configured, arranged and sized so as to generate jets that engage the incoherent mass M along the dimensions thereof that form the thickness of the layer S and the width of the layer S so as to cover it entirely.
  • the first spraying group 15 can comprise one or more nozzles distributed in a row along the width of the support 13 and oriented so as to generate jets that pass transversally through the incoherent mass M dispensed by the distribution group 12.
  • the second spraying group 16 and the third spraying group 17 each comprise one or more nozzles distributed in a row along the width of the support 13 and each adapted for generating a jet that hits the support 13 in a direction orthogonal to it.
  • jets can be of the "a sprinkle", "sheet” or other type.
  • the first liquid L1, the second liquid L2 and the third liquid L3 can be the same or different from each other; in a preferred embodiment they are equal to each other and they consist of a liquid obtained by mixing water and a glue, for example of the silicate type and preferably of the sodium-silicate type.
  • the doses of liquid fed to the three spraying groups 15, 16 and 17 are equal to each other.
  • the first deposition group 19 and the second deposition group 20 each comprise a respective reel from which the first sheet F1 and the second sheet F2, respectively, is unwound at controlled speed and synchronous with that of the support 13.
  • the pressing group 14 can consist of a plurality of pairs of opposite and counter-rotating rollers 34 between which the layer S (on the opposite faces of which the first sheet F1 and the second sheet F2 are possibly applied) supported by the support 13 passes.
  • a band 35 is wound around the rollers 34 that face the upper surface of the layer S.
  • the pressing group 14 is shaped and sized so as to apply a pressure comprised between 20 kg/cm 2 (1.96 MPa) and 70 kg/cm 2 (6.86 MPa) and, preferably, comprised between 30 kg/cm 2 (2.94 MPa) and 50 kg/cm 2 (4.9 MPa).
  • Waste paper was chopped into particles of average dimensions of about 5 mm to form an incoherent mass.
  • Such an incoherent mass was distributed onto the conveyor belt so as to obtain a layer of substantially uniform thickness S1 equal to about 70 mm.
  • a liquid consisting of 30% water and 70% glue i.e. commercial silicate, specifically "Nacoren F” - sodium salt of silicic acid with molar ratio >3.2 and content ⁇ 40% of Ingessil S.r.l.
  • glue i.e. commercial silicate, specifically "Nacoren F” - sodium salt of silicic acid with molar ratio >3.2 and content ⁇ 40% of Ingessil S.r.l.
  • such a quantity was sprayed for one third onto the first sheet before the layer S1 was formed on it, for one third in the incoherent mass falling onto the conveyor belt and before the formation of the layer S and for one third onto the upper surface of the layer S before the second sheet was deposited on it.
  • the layer S was then subjected to a pressure of about 30 kg/cm 2 with a reduction of the thickness from S1 to S2, where S2 is equal to about 7 mm.
  • Such a layer was cut to obtain panels of dimensions 100 mm x 100 mm on the opposite surfaces of which a respective layer of nonwoven fabric in PP of thickness of 3 mm and weight equal to about 400 gr/m 2 was applied.
  • the panels thus obtained were subjected to sound and thermic insulation tests according to current standards and it was found that for floor sound insulation they have a sound-insulating power ⁇ L w equal to about 24, for wall insulation they have a sound-insulating power Rw comprised between 48 and 52 and for thermic insulation they have a heat conductivity coefficient ⁇ comprised between 0.034 and 0.040.
  • the panels obtained with the process and with the plant object of the present invention have the advantage of having good mechanical characteristics and good thermic and sound insulation characteristics; therefore, they can be used, even by themselves, to make insulation elements and in particular to make vertical and horizontal partitions or insulation coatings in the field of building both in new buildings and in buildings under renovation.
  • the panels obtained with the process and with the plant object of the present invention have the advantage of also having an overall thickness that is low and relatively low average densities, which makes them usable, even by themselves, to make insulation elements not only for vertical partitions - thus leaving more useful walking surface - but also of external walls (coatings).
  • the panels obtained with the process and with the plant object of the present invention have the advantage of being obtained with essentially waste materials and with a low use of water and energy. This on the one hand reduces the production costs of such panels and on the other hand favours environmental protection.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Paper (AREA)

Claims (9)

  1. Verfahren zur Herstellung von Platten aus Altpapier, umfassend die Schritte:
    a) Bilden einer inkohärenten Masse (M), die Altpapierpartikel enthält,
    b) Ablegen der inkohärenten Masse (M) auf einem Träger (13), um eine Schicht (S) von einer im wesentlichen gleichmäßigen Dicke (S1) zu bilden,
    c) Aufbringen eines Drucks auf die Schicht (S),
    wobei eine erste Flüssigkeit (L1) während des Schrittes b) vor der Bildung der Schicht (S) auf oder in die inkohärente Masse (M) gesprüht wird, wobei das Verfahren ferner umfasst:
    - vor dem Schritt b) einen Schritt a0) des Ablegens eines ersten kontinuierlichen Blattes (F1) Papier auf dem Träger (13),
    - nach dem Schritt a0) und vor dem Schritt b) einen Schritt a1') des Benetzens des ersten kontinuierlichen Blattes (F1) Papier mit einer zweiten Flüssigkeit (L2),
    - nach dem Schritt b) und vor dem Schritt c) einen Schritt b1) des Benetzens der Oberfläche der Schicht (S) gegenüber derjenigen, die auf dem Träger (13) aufliegt, mit einer dritten Flüssigkeit (L3),
    - nach dem Schritt b) und vor dem Schritt c) einen Schritt b2) des Ablegens eines zweiten kontinuierlichen Blattes (F2) Papier auf der Oberfläche der Schicht (S) gegenüber der auf dem Träger (13) aufliegenden Schicht.
  2. Verfahren nach Anspruch 1, wobei der Schritt b1) dem Schritt b2) vorausgeht.
  3. Verfahren nach Anspruch 1 oder 2, wobei der Druck zwischen 20 kg/cm2 (1,96 MPa) und 70 kg/cm2 (6,86 MPa), vorzugsweise zwischen 30 kg/cm2 (2,94 MPa) und 50 kg/cm2 (4,9 MPa) liegt.
  4. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, wobei der Schritt b) dadurch erfolgt, dass die inkohärente Masse (M) aus einer größeren Höhe als der des Trägers (13) auf den Träger (13) selbst fällt, wobei die erste Flüssigkeit (L1) auf oder in die inkohärente Masse (M) gesprüht wird, die auf den Träger (13) fällt, wobei die erste Flüssigkeit (L1) entlang mindestens einer Richtung gesprüht wird, die eine Komponente parallel zur Verlegeebene des Trägers (13) aufweist.
  5. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, wobei mindestens eine der ersten Flüssigkeit (L1), der zweiten Flüssigkeit (L2) und der dritten Flüssigkeit (L3) Wasser und Klebstoff in Mengen zwischen 20 % und 40 % (Wasser) bzw. zwischen 80 % und 60 % (Klebstoff) umfasst.
  6. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, wobei die jeweiligen Mengen pro Flächeneinheit der Schicht (S) der ersten Flüssigkeit (L1), der zweiten Flüssigkeit (L2) und der dritten Flüssigkeit (L3) einander gleich oder verschieden voneinander sind, wobei die Gesamtmenge der ersten Flüssigkeit (L1), der zweiten Flüssigkeit (L2) und der dritten Flüssigkeit (L3) zwischen 0,5 kg/m2 und 1 kg/m2 liegt.
  7. Anlage (10) zur Herstellung von Platten aus Altpapier, umfassend:
    - eine Bildungsgruppe (11) zum Bilden einer inkohärenten Masse (M), die Altpapierteilchen enthält,
    - eine Verteilungsgruppe (12) zum Ablegen der inkohärenten Masse (M) auf einem Träger (13), um eine Schicht (S) mit einer im wesentlichen gleichmäßigen Dicke (S1) zu bilden,
    - eine Pressgruppe (14) zum Aufbringen eines Drucks auf die Schicht (S),
    - eine erste Sprühgruppe (15) zum Sprühen einer ersten Flüssigkeit (L1) auf oder in die von der Verteilungsgruppe (12) abgegebene inkohärente Masse (M) und vor der Bildung der Schicht (S),
    - stromaufwärts der Verteilungsgruppe (12) eine erste Abscheidungsgruppe (19) zum Ablegen eines ersten kontinuierlichen Blattes (F1) Papier auf dem Träger (13) vor der Bildung der Schicht,
    - stromaufwärts der Verteilungsgruppe (12) und stromabwärts der ersten Abscheidungsgruppe (19) eine zweite Sprühgruppe (16) zum Aufsprühen einer zweiten Flüssigkeit auf das erste kontinuierliche Blatt (F1) Papier vor der Bildung der Schicht (S),
    - stromabwärts der Verteilungsgruppe (12) eine dritte Sprühgruppe (17) zum Aufsprühen einer dritten Flüssigkeit (L3) auf die Oberfläche der Schicht (S) gegenüber der auf dem Träger (13) aufliegenden Schicht,
    - stromabwärts der Verteilungsgruppe (12) eine zweite Abscheidungsgruppe (20) zum Ablegen eines zweiten kontinuierlichen Blattes (F2) Papier auf der Oberfläche der Schicht (S) gegenüber der auf dem Träger (13) aufliegenden Schicht.
  8. Anlage (10) nach Anspruch 7, dadurch gekennzeichnet, dass die zweite Abscheidegruppe (20) stromabwärts der dritten Sprühgruppe (17) angeordnet ist.
  9. Anlage (10) nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Druck zwischen 20 kg/cm2 (1,96 MPa) und 70 kg/cm2 (6,86 MPa), vorzugsweise zwischen 30 kg/cm2 (2,94 MPa) und 50 kg/cm2 (4,9 MPa) liegt.
EP15194360.2A 2014-11-13 2015-11-12 Verfahren und anlage zur herstellung von platten aus altpapier Active EP3020525B1 (de)

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NO994282L (no) * 1999-08-20 2001-02-21 Ein Kohsan Co Ltd Fotokatalytisk tremassepreparat, skum og stöpt masse fremstilt derav, fremgangsmåter til fremstilling av preparatet, skummet og den stöpte masse, samt apparat til fremstilling av det fotokatalytiske tremassepreparatet
IT1313677B1 (it) 1999-11-23 2002-09-09 Giuseppe Locati Metodo e impianto per la produzione di fogli in materiale cartaceoaventi una struttura sostanzialmente rigida, e fogli di tale tipo.
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JP3563704B2 (ja) * 2000-03-07 2004-09-08 ニチハ株式会社 木質成形体の製造方法
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