EP3444086B1 - Multi-function panel consisting of wood and bicomponent fibres and production metho for a multi-function panel - Google Patents
Multi-function panel consisting of wood and bicomponent fibres and production metho for a multi-function panel Download PDFInfo
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- EP3444086B1 EP3444086B1 EP17186475.4A EP17186475A EP3444086B1 EP 3444086 B1 EP3444086 B1 EP 3444086B1 EP 17186475 A EP17186475 A EP 17186475A EP 3444086 B1 EP3444086 B1 EP 3444086B1
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- fibers
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- function panel
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- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000002023 wood Substances 0.000 title description 13
- 239000000835 fiber Substances 0.000 claims description 117
- 229920002522 Wood fibre Polymers 0.000 claims description 39
- 239000002025 wood fiber Substances 0.000 claims description 39
- 239000000203 mixture Substances 0.000 claims description 32
- 239000000654 additive Substances 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 230000000996 additive effect Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000003619 algicide Substances 0.000 claims description 6
- 239000000417 fungicide Substances 0.000 claims description 6
- 239000002917 insecticide Substances 0.000 claims description 6
- 239000004890 Hydrophobing Agent Substances 0.000 claims description 5
- -1 polyethylene terephthalate Polymers 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims 1
- 239000003570 air Substances 0.000 description 13
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 238000009413 insulation Methods 0.000 description 9
- 239000011162 core material Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 238000003860 storage Methods 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Classifications
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- 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
- B27N3/10—Moulding of mats
- B27N3/12—Moulding of mats from fibres
-
- 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
-
- 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
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- 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
- B27N1/006—Pretreatment of moulding material for increasing resistance to swelling by humidity
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
- E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like
Definitions
- the invention relates to a multifunctional panel made from wood and bicomponent fibers and a method for producing the multifunctional panel.
- Boards made of wood fibers and bicomponent fibers are known per se and are produced in different thicknesses and bulk densities, depending on the planned application.
- An example of these products is a wood fiber insulation board with a proportion of softwood fibers of 91%, a proportion of bicomponent fibers (hereinafter: bicofibre) of 5% and a proportion of fire retardants of 4%.
- An example of such a panel is the "best wood FLEX 50" thermal insulation panel, manufacturer: Holzwerk Gebr.
- the multifunctional board according to the invention consists of wood fibers and bico fibers and optionally at least one additive or a mixture of additives, wherein the proportion of wood fibers can be from 10% by weight to 90% by weight and the proportion of bico fibers can be correspondingly 90% by weight. % to 10% by weight.
- the at least one or the mixture of additives comprises fungicides, insecticides, algicides and hydrophobing agents.
- the density of the multifunctional board can be from 100 kg/m 3 to 300 kg/m 3 .
- Fibers and fiber bundles that are obtained by defibrating wood chips are typically referred to as wood fibers.
- Agglomerates of fibers preferably coarse fiber bundles of fibers that are not completely separated, are preferably used for the multifunctional plate according to the invention, the length of which is 3 mm to 18 mm.
- Wood fibers are preferably used, the length of which is 6 mm to 12 mm.
- the diameter of the agglomerates is 100 ⁇ m to 3 mm.
- the coarse fibers that are used for the multifunctional panel according to the invention have higher restoring forces in comparison to the mostly completely separated, finer fibers that are used to produce medium-density or high-density fiber panels. They have therefore proven to be suitable for the production of particularly light fiberboard.
- the Bico fibers are made from two different components or materials.
- a core of core material is surrounded by a cladding of cladding material.
- Layered bicofibers can also be used, but preferred are clad fibers with a fully clad core.
- Typical core materials are polyethylene terephthalate (PET) or polyethylene.
- Co- or iso-polyethylene terephthalate (co-PET or iso-PET) is preferably used as the jacket material.
- the bicofiber is solid at room temperature.
- the jacket material advantageously has the lowest possible melting point, at least a lower melting point than the core material.
- the melting point of the jacket material is preferably a maximum melting point of 160°C, particularly preferably a maximum of 130°C, in particular a melting point of 90°C to 115°C. In this way, little energy is consumed in order to melt or melt the jacket of the bico fibers in order to achieve bonding of bico fibers and wood fibers.
- the bico fibers are used with a length that is advantageously shorter than the length of the wood fibers.
- Bico fibers are preferably used with a length of 0.5 mm to 30 mm, their diameter is usually 3 to 15 den, mostly 4 to 9 den.
- the thinner Bico fibers are particularly easy to process into a homogeneous mixture with the wood fibers. In addition, they enable the formation of particularly fine and evenly distributed adhesive dots. According to a particularly preferred embodiment of the multifunction panel according to the invention, it has no binder.
- the proportion of wood fibers is preferably 70% by weight to 40% by weight, while the proportion of bico fibers is preferably 30% by weight to 60% by weight. According to a particularly advantageous embodiment, the proportion of wood fibers is 45% by weight to 55% by weight and the proportion of bico fibers is 55% by weight to 45% by weight.
- the multifunction panel according to the invention has only wood and bico fibers. Furthermore, one or more of the following additives are added to the multifunctional panel: fungicides, insecticides, algicides and hydrophobing agents.
- the additives can be applied to the outer surface of the multifunction plate, but preferably they are added to the fibers before drying in the blow line or to the fiber mixture before spreading into a fiber cake so that they are distributed over the cross section of the plate. It is also conceivable that some of the fibers are mixed with the additives and that this mixture is used to spread the outer layers of the multifunctional panel.
- the multifunctional panel according to the invention has a weight of at least 100 kg/m 3 to a maximum of 300 kg/m 3 , preferably a weight of 150 kg/m 3 to 250 kg/m 3 . It is therefore heavier than known insulation boards that have a weight of z. B. only 50 kg / m 3 have. However, the multifunction plate according to the invention achieves significantly more. While known lightweight insulating panels have only low strength properties and are particularly not suitable for fastening means to give support, the multifunctional panel according to the invention has a compressive strength of z. B. 45 kPa to 55 kPa and a screw pull-out strength of z. 65N to 160N. These strength values are maintained with the same good thermal insulation values of 0.035 W/mK to 0.39 W/mK achieved.
- the good strength properties allow the multifunction panel to be attached without additional tools, e.g. B. to screw. It is possible to use the multifunctional panel as a load-bearing element in a sandwich construction made up of several different panels.
- the multifunction panel according to the invention has sufficient compressive strength and rigidity to coat it, which is not possible with known, flexible thermal insulation panels.
- the increased strength of the multifunctional panel also allows profiles to be attached, either by processing the edges or by applying separate profiles, as well as milling or sawing the panel.
- the wood and bico fibers are preferably mixed in several successive steps in order to obtain a mixture that is as homogeneous as possible.
- all of the fibers and any additives are mixed as a uniform mixture.
- This mixture is used to spread and compact a single-layer panel.
- two or more mixtures are prepared, where at least one mixture, e.g. B. the top layer mixture also contains an additive in addition to the fibers. Most often, the top layer mix containing the additive is spread as the outer layer, followed by a mix with or without other additives. Finally, the cover layer mixture is scattered again.
- the fiber cake that is scattered from the fiber mixture or mixtures usually has a thickness of about 25 cm to 45 cm. This fiber cake is usually compressed to about 2% to 5% of the original thickness, so that the multifunctional panel has a thickness of 5 mm to 25 mm, preferably a thickness of 10 mm to 15 mm.
- Compacting is preferably carried out by two circulating conveyor belts inclined towards one another, the first of which is arranged below the fiber cake and the second inclined at an angle above the fiber cake. The maximum distance between the conveyor belts is greatest adjacent to the scattering of the fiber cake and smallest adjacent to the heating.
- the circulating conveyor belts are sufficient to compress the fiber cake by up to 98%; a press is not required.
- the conveyor belts preferably have belts made of a material which is permeable to air but which is sufficiently dense that the fibers of the fiber cake are held between the conveyor belts.
- the compaction is carried out according to a simple design at ambient temperature.
- the ambient temperature is not sufficient to melt the sheath of the bico fibers. Accordingly, no sticking points can form solely through compaction.
- the fiber cake is already heated to a temperature above ambient temperature during compression in order to soften the sheath of the bicofiber. This can be done by means for heating the ambient air placed parallel to the conveyor belts.
- the compacted fiber cake then passes through a continuous furnace, with the compacted fiber cake still being held between circulating, air-permeable belts.
- the fiber cake is heated by means of heated air to a temperature that melts the bicofiber jacket, typically a temperature of approx. 100 °C to 160 °C.
- the melting sheath of the bicofiber bonds the core of the bicofiber to the wood fiber, creating a bonded structure that has large voids of air arranged in a scaffold of fibers.
- the fibers of the multifunction board in particular the wood fibers, have restoring forces that can still lead to an undesirable deformation of the multifunction board even after the adhesive points have been formed.
- the adhesive dots show a holding power that is greater than the restoring force of the wood fibers, so that the dimensional stability of the multifunctional panel is guaranteed.
- Cooling can be done by supplying unheated, accelerated air. However, the cooling can advantageously also be carried out with cooled and accelerated air.
- the multifunction panels of the invention are not fully flexible such.
- the multifunction plates according to the invention are therefore also available as large-format plates, e.g. B. with a format of 2800 mm ⁇ 2070 mm. These formats can also be produced because simple production devices are sufficient and the production takes place without complex presses.
- Another advantage of the multifunction panel according to the invention is that it can be disposed of without any problems. Thermal disposal of the panel is also possible.
- the wood fibers 2 are 6 mm to 18 mm long. They consist of agglomerates of fibres, ie bundles of fibers which result from the defibration of wood chips and which, after defibration, adhere to one another or which are not yet completely separated from one another. The diameter of the agglomerates is between 100 ⁇ m and 3 mm.
- the bico fibers 3 are much thinner; they consist of co- or iso-PET as the jacket material and PET as the core material. Their length is up to 30 mm and their diameter is about 6 den.
- the multifunctional panel 1 shows the larger wood fibers 2 with a proportion of 44% by weight in the multifunction panel 1 and the much finer bico fibers 3 with a proportion of 56% by weight.
- the multifunctional panel 1 is 11 mm thick and has a weight of 150 kg/m 3 .
- the dimensions of the plate are 2800 mm x 2070 mm.
- the fiber mixture of wood and bico fibers 2, 3 forms a three-dimensional framework. At the crossing points between the wood and bico fibers but also between bico fibers, as in 2 shown, adhesive points 4 are formed, which give the plate strength without reducing the soundproofing properties.
- the restoring force of the wood fibers 3 makes it possible to produce a multifunctional panel with a large proportion of cavities, so that the panel has a low weight.
- the high proportion of bico fibers results in a very high compressive strength in relation to the low weight and, surprisingly, a high screw pull-out resistance in relation to the weight.
- An increasing proportion of bico fibers leads to an increase in compressive strength.
- FIG. 3 shows the production of the multifunction panel according to the invention.
- the mixture of wood and bico fibers, to which additives may also be added, is scattered from a reservoir 5 via a star feeder 6 to form a fiber cake 7 approximately 30 cm thick.
- the fibers are mixed beforehand in a manner known per se, preferably in several stages or steps, in order to achieve a mixture which is as homogeneous as possible.
- the fiber cake 7 is scattered onto a lower conveyor belt 8 .
- the lower conveyor belt 8 is aligned horizontally. At an angle to this, the upper conveyor belt 9 is inclined. At the end 10 of the upper conveyor belt 9, which is adjacent to the reservoir 5, the distance to the lower conveyor belt 8 corresponds to at least the thickness of the fiber cake, here about 30 cm. The distance between the upper conveyor belt 9 and the lower conveyor belt 8 decreases to the second end 11 of the upper conveyor belt to the predetermined thickness of the multifunction panel, here 11 mm.
- Fans are arranged parallel to the conveyor belts 8 and 9 and cause heated air to flow through the fiber cake 7 .
- the multifunctional panel 1 is guided into a continuous furnace 14 between the lower conveyor belt 12 and a second upper conveyor belt 13 arranged parallel thereto.
- Heating devices 15, the z. B. generate heat via heating wires or infrared radiation are arranged above and below the conveyor belts 12 and 13.
- the heating devices 15 are optionally supported by fans in order to accelerate the heated air and convey it through the conveyor belts 12, 13 and the multifunction panel 1.
- the circulating belts of the conveyor belts 12, 13 are made of heat-resistant, air-permeable material, e.g. B. a metal mesh or a fabric that is dense enough to hold back the wood and bico fibers 2, 3 despite the air permeability.
- the jacket of the bico fibers is now further heated to such an extent that the jacket melts or softens to such an extent that wood fibers 2 or other bico fibers 3 that are in contact with the jacket form an adhesive point 4 with the melted or softened jacket (cf . 2 ). Due to the high proportion of bico fibers 3, numerous adhesive points 4 are formed, which give the multifunctional panel 1 significantly greater strength than a thermal insulation panel according to the prior art, which has only a 5% proportion of bico fibers.
- the adhesive dots 4 produced in this way in the continuous oven 14 are initially still soft. At least some of them still have a low strength, so that the restoring force of the wood fibers 2 is greater than the strength of the adhesive dots 4. If the still warm multifunction panel 1 were now released from the conveyor belts 12, 13, there would be a risk of undesirable changes in shape . In order to avoid these undesired changes in shape, the height of the multifunctional plate 1 is further fixed by the conveyor belts 12 and 13 and transferred to a device 16 for cooling.
- the device 16 for cooling is provided with means 17 for generating cool air, which is guided through the multifunction panel.
- the means 17 for generating cool air can be simple fans that convey air through the multifunction panel 1 that has the ambient temperature that prevails outside the production plant.
- a cooling device can also be provided, which cools the air to a specific temperature.
- the multifunctional board 1 is only released from being guided by the conveyor belts 12, 13 when the adhesive points 4 have solidified as a result of cooling to such an extent that their holding force is greater than the restoring force of the wood fibers 2.
- the width of the multifunction plate 1 is 2800 mm.
- the multifunction panel 1 is produced in a continuous process in infinite length. It can be shortened to any length, e.g. B. to a length of 2070 mm.
- the multifunction panel 1 described above and the manufacturing process for this multifunction panel are modified according to the invention in such a way that in addition to the wood and bico fibers 2, 3, one or more additives are also added, e.g. B. an additive or a mixture of additives from the group of additives which includes fungicides, insecticides, algicides and waterproofing agents.
- the additives are usually added in amounts of up to 10% by weight. They are either already added to the wood fibers in the blow line or they are added to the mixture of wood fibers 2 and bico fibers 3 altogether, or a second storage container is used, from which a separate layer of the fiber cake 7 is scattered, in which the first storage container 5 and the second storage container sprinkle the fiber cake 7 alternately.
- the second storage container preferably scatters the outer layers of the fiber cake 7.
- a fiber mixture of 30% by weight bico fibers 3 and 70% by weight wood fibers 2 is scattered onto the lower conveyor belt 8 in an amount of 1.98 kg/m 2 .
- the second batch shows a fiber mixture of 44% bico fibers and 56% by weight wood fibers and the third batch has a fiber mixture of 56% by weight bico fibers 3 and 44% by weight wood fibers 2 .
- the second and third batches are also spread at 1.98 kg/m 2 .
- Table 2 shows that the thickness and density of the boards are identical, only the proportion of wood fibers 2 and bico fibers 3 varies.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Description
Die Erfindung betrifft eine Multifunktionsplatte aus Holz- und Bicomponentenfasern sowie ein Verfahren zum Herstellen der Multifunktionsplatte.The invention relates to a multifunctional panel made from wood and bicomponent fibers and a method for producing the multifunctional panel.
Platten aus Holzfasern und Bicomponentenfasern sind an sich bekannt und werden in unterschiedlichen Dicken und Rohdichten, je nach geplanter Anwendung, hergestellt. Ein Beispiel für diese Produkte ist eine Holzfaser-Dämmplatte mit einem Anteil an Nadelholzfasern von 91%, einem Anteil an Bicomponentenfaser (nachfolgend: Bicofaser) von 5% und einem Anteil an Brandschutzmittel von 4%. Eine solche Dämmplatte ist leicht und hat gute Wärmedämmeigenschaften (Wärmeleitfähigkeit = 0,039 W/mK). Sie ist weich und biegsam, sie weist jedoch nur so geringe Festigkeitseigenschaften auf, dass diese nicht gemessen werden können. Ein Beispiel für eine solche Platte ist die "best wood FLEX 50" - Wärmedämmplatte, Hersteller: Holzwerk Gebr. Schneider GmbH, Eberhardzell, die ein Gewicht von ca. 50 kg/m3 aufweist. Weitere Beispiele zeigen die
Es ist daher Aufgabe der Erfindung, eine Holzwerkstoffplatte bereitzustellen, die verbesserte Eigenschaften aufweist.It is therefore the object of the invention to provide a wood-based panel which has improved properties.
Diese Aufgabe wird gelöst mit einer Multifunktionsplatte nach Anspruch 1 und mit einem Verfahren zur Herstellung einer Multifunktionsplatte nach Anspruch 10.This object is achieved with a multifunction panel according to
Die erfindungsgemäße Multifunktionsplatte besteht aus Holzfasern und Bicofasern sowie optional aus mindestens einem Additiv oder einer Mischung von Additiven, wobei der Anteil der Holzfasern von 10 Gew.-% bis 90 Gew.-% betragen kann und der Anteil der Bicofasern kann entsprechend 90 Gew.-% bis 10 Gew.-% betragen. Das mindestens eine oder die Mischung von Additiven umfasst Fungizide, Insektizide, Algizide und Hydrophobierungsmittel. Die Dichte der Multifunktionsplatte kann von 100 kg/m3 bis 300 kg/m3 betragen.The multifunctional board according to the invention consists of wood fibers and bico fibers and optionally at least one additive or a mixture of additives, wherein the proportion of wood fibers can be from 10% by weight to 90% by weight and the proportion of bico fibers can be correspondingly 90% by weight. % to 10% by weight. The at least one or the mixture of additives comprises fungicides, insecticides, algicides and hydrophobing agents. The density of the multifunctional board can be from 100 kg/m 3 to 300 kg/m 3 .
Als Holzfasern werden typischerweise Fasern und Faserbündel bezeichnet, die durch Zerfasern von Holzhackschnitzeln erhalten werden. Die kleiner dimensionierten Fasern und Faserbündel, die hier gemeinsam als Holzfasern bezeichnet werden, weisen geringere Rückstellkräfte als Späne auf. Für die erfindungsgemäße Multifunktionsplatte werden bevorzugt Agglomerate aus Fasern, bevorzugt grobe Faserbündel aus nicht vollständig separierten Fasern eingesetzt, deren Länge 3 mm bis 18 mm beträgt. Bevorzugt werden Holzfasern eingesetzt, deren Länge 6 mm bis 12 mm beträgt. Der Durchmesser der Agglomerate beträgt 100 µm bis 3 mm. Diese Holzfasern können schneller und homogener mit den Bicofasern gemischt werden. Die groben Fasern, die für die erfindungsgemäße Multifunktionsplatte eingesetzt werden, weisen im Vergleich zu den meist vollständig separierten, feineren Fasern, die zur Herstellung von mitteldichten oder hochdichten Faserplatten eingesetzt werden, höhere Rückstellkräfte auf. Sie haben sich daher zur Herstellung besonders leichter Faserplatten als geeignet erwiesen.Fibers and fiber bundles that are obtained by defibrating wood chips are typically referred to as wood fibers. The smaller-sized fibers and fiber bundles, which are collectively referred to here as wood fibers, have lower restoring forces than chips. Agglomerates of fibers, preferably coarse fiber bundles of fibers that are not completely separated, are preferably used for the multifunctional plate according to the invention, the length of which is 3 mm to 18 mm. Wood fibers are preferably used, the length of which is 6 mm to 12 mm. The diameter of the agglomerates is 100 µm to 3 mm. These wood fibers can be mixed faster and more homogeneously with the Bico fibers. The coarse fibers that are used for the multifunctional panel according to the invention have higher restoring forces in comparison to the mostly completely separated, finer fibers that are used to produce medium-density or high-density fiber panels. They have therefore proven to be suitable for the production of particularly light fiberboard.
Die Bicofasern sind aus zwei unterschiedlichen Komponenten bzw. Materialien hergestellt. Ein Kern aus Kernmaterial ist von einem Mantel aus Mantelmaterial umhüllt. Es können auch geschichtete Bicofasern verwendet werden, bevorzugt sind jedoch ummantelte Fasern mit einem vollständig umhüllten Kern. Typische Kernmaterialien sind Polyethylenterephthalat (PET) oder Polyethylen. Als Mantelmaterial wird bevorzugt co-oder iso-Polyethylenterephthalat (co-PET bzw. iso-PET) eingesetzt.The Bico fibers are made from two different components or materials. A core of core material is surrounded by a cladding of cladding material. Layered bicofibers can also be used, but preferred are clad fibers with a fully clad core. Typical core materials are polyethylene terephthalate (PET) or polyethylene. Co- or iso-polyethylene terephthalate (co-PET or iso-PET) is preferably used as the jacket material.
Die Bicofaser ist bei Raumtemperatur fest. Das Mantelmaterial weist vorteilhaft einen möglichst niedrigen Schmelzpunkt auf, jedenfalls einen niedrigeren Schmelzpunkt als das Kernmaterial. Der Schmelzpunkt des Mantelmaterials beträgt bevorzugt einen Schmelzpunkt von maximal 160 °C, besonders bevorzugt von maximal 130 °C, insbesondere einen Schmelzpunkt von 90 °C bis 115 °C auf. Auf diese Weise wird wenig Energie verbraucht, um den Mantel der Bicofasern an- bzw. aufzuschmelzen, um eine Verklebung von Bico- und Holzfasern zu erreichen.The bicofiber is solid at room temperature. The jacket material advantageously has the lowest possible melting point, at least a lower melting point than the core material. The melting point of the jacket material is preferably a maximum melting point of 160°C, particularly preferably a maximum of 130°C, in particular a melting point of 90°C to 115°C. In this way, little energy is consumed in order to melt or melt the jacket of the bico fibers in order to achieve bonding of bico fibers and wood fibers.
Die Bicofasern werden mit einer Länge eingesetzt, die vorteilhaft kürzer ist als die Länge der Holzfasern. Bicofasern werden bevorzugt mit einer Länge von 0,5 mm bis 30 mm eingesetzt, ihr Durchmesser beträgt meist 3 den bis 15 den, meist 4 den bis 9 den. Die dünneren Bicofasern lassen sich besonders einfach zu einer homogenen Mischung mit den Holzfasern verarbeiten. Zudem ermöglichen sie die Ausbildung besonders fein und gleichmäßig verteilter Klebepunkte. Nach einer besonders bevorzugten Ausführung der erfindungsgemäßen Multifunktionsplatte weist diese kein Bindemittel auf.The bico fibers are used with a length that is advantageously shorter than the length of the wood fibers. Bico fibers are preferably used with a length of 0.5 mm to 30 mm, their diameter is usually 3 to 15 den, mostly 4 to 9 den. The thinner Bico fibers are particularly easy to process into a homogeneous mixture with the wood fibers. In addition, they enable the formation of particularly fine and evenly distributed adhesive dots. According to a particularly preferred embodiment of the multifunction panel according to the invention, it has no binder.
Der Anteil von Holzfasern beträgt bevorzugt 70 Gew.-% bis 40 Gew.-%, während der Anteil der Bicofasern bevorzugt 30 Gew.-% bis 60 Gew.-% beträgt. Nach einer besonders vorteilhaften Ausführung beträgt der Anteil der Holzfasern 45 Gew.-% bis 55 Gew.-% und der Anteil der Bicofasern beträgt 55 Gew.-% bis 45 Gew.-%.The proportion of wood fibers is preferably 70% by weight to 40% by weight, while the proportion of bico fibers is preferably 30% by weight to 60% by weight. According to a particularly advantageous embodiment, the proportion of wood fibers is 45% by weight to 55% by weight and the proportion of bico fibers is 55% by weight to 45% by weight.
In der erfindungsgemäßen Ausführung weist die erfindungsgemäße Multifunktionsplatte nur Holz- und Bicofasern auf. Weiter sind der Multifunktionsplatte eines oder mehrere der nachfolgend genannten Additive zugesetzt: Fungizide, Insektizide, Algizide und Hydrophobierungsmittel. Die Additive können auf die Außenfläche der Multifunktionsplatte aufgebracht werden, bevorzugt werden sie jedoch den Fasern vor dem Trocknen in der Blow-Line oder der Fasermischung vor dem Streuen zu einem Faserkuchen zugesetzt, so dass sie über den Querschnitt der Platte verteilt sind. Denkbar ist auch, dass ein Teil der Fasern mit den Additiven gemischt wird und dass diese Mischung zum Streuen von Außenlagen der Multifunktionsplatte eingesetzt wird.In the embodiment according to the invention, the multifunction panel according to the invention has only wood and bico fibers. Furthermore, one or more of the following additives are added to the multifunctional panel: fungicides, insecticides, algicides and hydrophobing agents. The additives can be applied to the outer surface of the multifunction plate, but preferably they are added to the fibers before drying in the blow line or to the fiber mixture before spreading into a fiber cake so that they are distributed over the cross section of the plate. It is also conceivable that some of the fibers are mixed with the additives and that this mixture is used to spread the outer layers of the multifunctional panel.
Die erfindungsgemäße Multifunktionsplatte weist ein Gewicht von mindestens 100 kg/m3 bis maximal 300 kg/m3 auf, bevorzugt ein Gewicht von 150 kg/m3 bis 250 kg/m3. Sie ist damit schwerer als bekannte Dämmplatten, die ein Gewicht von z. B. nur 50 kg/m3 aufweisen. Dafür leistet die erfindungsgemäße Multifunktionsplatte jedoch wesentlich mehr. Während bekannte leichte Dämmplatten nur geringe Festigkeitseigenschaften aufweisen und insbesondere nicht geeignet sind, Befestigungsmitteln Halt zu geben, weist die erfindungsgemäße Multifunktionsplatte eine Druckfestigkeit von z. B. 45 kPa bis 55 kPa und eine Schraubenauszugsfestigkeit von z. B. 65 N bis 160 N auf. Diese Festigkeitswerte werden bei unverändert guten Wärmedämmwerten von 0,035 W/mK bis 0,39 W/mK erreicht.The multifunctional panel according to the invention has a weight of at least 100 kg/m 3 to a maximum of 300 kg/m 3 , preferably a weight of 150 kg/m 3 to 250 kg/m 3 . It is therefore heavier than known insulation boards that have a weight of z. B. only 50 kg / m 3 have. However, the multifunction plate according to the invention achieves significantly more. While known lightweight insulating panels have only low strength properties and are particularly not suitable for fastening means to give support, the multifunctional panel according to the invention has a compressive strength of z. B. 45 kPa to 55 kPa and a screw pull-out strength of z. 65N to 160N. These strength values are maintained with the same good thermal insulation values of 0.035 W/mK to 0.39 W/mK achieved.
Die guten Festigkeitseigenschaften erlauben es, die Multifunktionsplatte ohne weitere Hilfsmittel zu befestigen, z. B. zu verschrauben. Es ist möglich, die Multifunktionsplatte als tragendes Element eine Sandwichkonstruktion aus mehreren unterschiedlichen Platten einzusetzen. Die erfindungsgemäße Multifunktionsplatte weist eine ausreichende Druckfestigkeit und Steifigkeit auf, um sie zu beschichten, was mit bekannten, flexiblen Wärmedämmplatten nicht möglich ist. Die erhöhte Festigkeit der Multifunktionsplatte erlaubt auch das Anbringen von Profilen, sei es durch Bearbeiten der Kanten oder durch Aufbringen separater Profile sowie das Fräsen oder Sägen der Platte.The good strength properties allow the multifunction panel to be attached without additional tools, e.g. B. to screw. It is possible to use the multifunctional panel as a load-bearing element in a sandwich construction made up of several different panels. The multifunction panel according to the invention has sufficient compressive strength and rigidity to coat it, which is not possible with known, flexible thermal insulation panels. The increased strength of the multifunctional panel also allows profiles to be attached, either by processing the edges or by applying separate profiles, as well as milling or sawing the panel.
Das Verfahren zum Herstellen der Multifunktionsplatte bestehend aus einem Anteil an Holzfasern von 10 Gew.-% bis 90 Gew.-% und einem Anteil an Bicomponentenfasern von 90 Gew.-% bis 10 Gew.-% sowie einem Additiv oder einer Mischung von Additiven aus einer Gruppe, die Fungizide, Insektizide, Algizide und Hydrophobierungsmittel umfasst und mit einer Dichte von 100 kg/m3 bis 300 kg/m3 umfasst die Schritte des
- Mischens von Holzfasern und Bicomponentenfasern sowie des Additivs oder der Mischung von Additiven, des
- Streuens eines Faserkuchens, des
- Verdichtens des Faserkuchens unter Druck, des
- Erhitzens des Faserkuchens mittels eines Luftstroms und des
- Abkühlens des Faserkuchens unter Druck.
- Mixing of wood fibers and bicomponent fibers and the additive or mixture of additives, des
- Sprinkle a fiber cake, des
- compaction of the fiber cake under pressure, des
- Heating the fiber cake by means of an air stream and the
- cooling the fiber cake under pressure.
Die Holz- und Bicofasern werden bevorzugt in mehreren aufeinanderfolgenden Schritten gemischt, um eine möglichst homogene Mischung zu erhalten. In einer einfachen Ausführung werden sämtliche Fasern und ggf. Additive als eine einheitliche Mischung gemischt. Mit dieser Mischung wird eine einschichtige Platte gestreut und verdichtet. Nach einer alternativen Ausführung werden zwei oder mehr Mischungen hergestellt, wobei mindestens eine Mischung, z. B. die Decklagenmischung zusätzlich zu den Fasern auch ein Additiv enthält. Meist wird die Decklagenmischung, die das Additiv enthält, als Außenlage gestreut, gefolgt von einer Mischung ohne oder mit anderen Additiven. Abschließend wird wieder die Decklagenmischung gestreut.The wood and bico fibers are preferably mixed in several successive steps in order to obtain a mixture that is as homogeneous as possible. In a simple embodiment, all of the fibers and any additives are mixed as a uniform mixture. This mixture is used to spread and compact a single-layer panel. According to an alternative embodiment, two or more mixtures are prepared, where at least one mixture, e.g. B. the top layer mixture also contains an additive in addition to the fibers. Most often, the top layer mix containing the additive is spread as the outer layer, followed by a mix with or without other additives. Finally, the cover layer mixture is scattered again.
Der Faserkuchen, der aus der oder den Fasermischungen gestreut wird, weist üblicherweise eine Dicke von ca. 25 cm bis 45 cm auf. Dieser Faserkuchen wird meist auf ca. 2% bis 5% der ursprünglichen Dicke komprimiert, so dass die Multifunktionsplatte eine Dicke von 5 mm bis 25 mm aufweist, bevorzugt eine Dicke von 10 mm bis 15 mm aufweist. Das Verdichten erfolgt bevorzugt durch zwei umlaufende, zueinander geneigt stehende Förderbänder, von denen das erste unter dem Faserkuchen angeordnet ist und das zweite schräg geneigt über dem Faserkuchen. Der maximale Abstand der Förderbänder zueinander ist benachbart zum Streuen des Faserkuchens am größten und benachbart zum Erhitzen am kleinsten. Die umlaufenden Förderbänder reichen aus, um den Faserkuchen um bis zu 98 % zu verdichten; eine Presse ist nicht erforderlich. Die Förderbänder weisen bevorzugt Bänder aus einem luftdurchlässigen Material auf, das jedoch so dicht ist, dass die Fasern des Faserkuchens zwischen den Förderbändern gehalten werden.The fiber cake that is scattered from the fiber mixture or mixtures usually has a thickness of about 25 cm to 45 cm. This fiber cake is usually compressed to about 2% to 5% of the original thickness, so that the multifunctional panel has a thickness of 5 mm to 25 mm, preferably a thickness of 10 mm to 15 mm. Compacting is preferably carried out by two circulating conveyor belts inclined towards one another, the first of which is arranged below the fiber cake and the second inclined at an angle above the fiber cake. The maximum distance between the conveyor belts is greatest adjacent to the scattering of the fiber cake and smallest adjacent to the heating. The circulating conveyor belts are sufficient to compress the fiber cake by up to 98%; a press is not required. The conveyor belts preferably have belts made of a material which is permeable to air but which is sufficiently dense that the fibers of the fiber cake are held between the conveyor belts.
Das Verdichten erfolgt nach einer einfachen Ausführung bei Umgebungstemperatur. Die Umgebungstemperatur reicht jedoch nicht aus, den Mantel der Bicofasern zum Schmelzen zu bringen. Entsprechend können sich allein durch das Verdichten keine Klebepunkte ausbilden.The compaction is carried out according to a simple design at ambient temperature. However, the ambient temperature is not sufficient to melt the sheath of the bico fibers. Accordingly, no sticking points can form solely through compaction.
Nach einer bevorzugten Ausführung wird der Faserkuchen bereits beim Verdichten auf eine Temperatur über Umgebungstemperatur erwärmt, um den Mantel der Bicofaser zu erweichen. Dies kann durch Mittel zum Erwärmen der Umgebungsluft erfolgen, die parallel zu den Förderbändern angeordnet sind.According to a preferred embodiment, the fiber cake is already heated to a temperature above ambient temperature during compression in order to soften the sheath of the bicofiber. This can be done by means for heating the ambient air placed parallel to the conveyor belts.
Der verdichtete Faserkuchen durchläuft dann einen Durchlaufofen, wobei der verdichtete Faserkuchen weiterhin zwischen umlaufenden, luftdurchlässigen Bändern gehalten wird. Im Durchlaufofen wird der Faserkuchen mittels erwärmter Luft erhitzt bis auf eine Temperatur, die den Mantel der Bicofaser zum Schmelzen bringt, typisch eine Temperatur von ca. 100 °C bis 160 °C. Der schmelzende Mantel der Bicofaser verklebt den Kern der Bicofaser mit der Holzfaser, so dass eine durch Klebpunkte fixierte Struktur entsteht, die große Hohlräume an Luft aufweist, die in einem Gerüst aus Fasern angeordnet sind.The compacted fiber cake then passes through a continuous furnace, with the compacted fiber cake still being held between circulating, air-permeable belts. In the continuous furnace, the fiber cake is heated by means of heated air to a temperature that melts the bicofiber jacket, typically a temperature of approx. 100 °C to 160 °C. The melting sheath of the bicofiber bonds the core of the bicofiber to the wood fiber, creating a bonded structure that has large voids of air arranged in a scaffold of fibers.
Die Fasern der Multifunktionsplatte, insbesondere die Holzfasern, verfügen über Rückstellkräfte, die selbst nach dem Ausbilden der Klebepunkte noch zu einer unerwünschten Verformung der Multifunktionsplatte führen können. Um dieses Risiko zu minimieren, ist es bevorzugt, die verdichtete, mit Klebepunkten versehene Multifunktionsplatte weiterhin zwischen Förderbändern zu führen, die unmittelbar an der Plattenoberfläche anliegen, so dass das Abkühlen erfolgt, während die Förderbänder die Multifunktionsplatte fixieren. Nach dem Abkühlen zeigen die Klebepunkte eine Haltekraft, die größer ist als die Rückstellkraft der Holzfasern, so dass die Formstabilität der Multifunktionsplatte gewährleistet ist.The fibers of the multifunction board, in particular the wood fibers, have restoring forces that can still lead to an undesirable deformation of the multifunction board even after the adhesive points have been formed. In order to minimize this risk, it is preferred to continue to guide the compacted, adhesive-dotted multifunction board between conveyor belts which are in direct contact with the board surface, so that the cooling takes place while the conveyor belts fix the multifunction board in place. After cooling, the adhesive dots show a holding power that is greater than the restoring force of the wood fibers, so that the dimensional stability of the multifunctional panel is guaranteed.
Das Abkühlen kann durch Zufuhr ungeheizter, beschleunigter Luft erfolgen. Das Abkühlen kann vorteilhaft aber auch mit gekühlter und beschleunigter Luft erfolgen.Cooling can be done by supplying unheated, accelerated air. However, the cooling can advantageously also be carried out with cooled and accelerated air.
Die erfindungsgemäßen Multifunktionsplatten sind nicht vollständig biegsam wie z. B. leichte Wärmedämmplatten. Sie sind ausreichend biegesteif um in beliebigen Abmessungen hergestellt werden zu können. Die erfindungsgemäßen Multifunktionsplatten sind daher auch als großformatige Platten z. B. mit einem Format von 2800 mm × 2070 mm herstellbar. Diese Formate können auch deshalb hergestellt werden, weil einfache Produktionsvorrichtungen ausreichen und die Herstellung ohne aufwändige Pressen erfolgt.The multifunction panels of the invention are not fully flexible such. B. lightweight thermal insulation boards. They are sufficiently rigid to be able to be manufactured in any dimensions. The multifunction plates according to the invention are therefore also available as large-format plates, e.g. B. with a format of 2800 mm × 2070 mm. These formats can also be produced because simple production devices are sufficient and the production takes place without complex presses.
Es ist als weiterer Vorteil der erfindungsgemäßen Multifunktionsplatte anzusehen, dass die Entsorgung unproblematisch erfolgen kann. Auch eine thermische Entsorgung der Platte ist möglich.Another advantage of the multifunction panel according to the invention is that it can be disposed of without any problems. Thermal disposal of the panel is also possible.
Details der Erfindung werden nachfolgend anhand von Ausführungsbeispielen näher erläutert. Es zeigen:
- Fig.1
- eine schematische, nicht-maßstäbliche Darstellung eines Schnitts durch eine erfindungsgemäße Multifunktionsplatte,
- Fig. 2
- ein nicht-maßstäblicher Ausschnitt aus einem Querschnitt der erfindungsgemäßen Multifunktionsplatte,
- Fig. 3
- eine schematische Darstellung der Herstellung einer Multifunktionsplatte.
- Fig.1
- a schematic representation, not to scale, of a section through a multifunction panel according to the invention,
- 2
- a detail, not to scale, of a cross section of the multifunction panel according to the invention,
- 3
- a schematic representation of the production of a multifunction panel.
Das Fasergemisch aus Holz- und Bicofasern 2, 3 bildet ein dreidimensionales Gerüst. An den Kreuzungspunkten zwischen den Holz- und Bicofasern aber auch zwischen Bicofasern haben sich, wie in
Der Faserkuchen 7 wird auf ein unteres Förderband 8 gestreut. Das untere Förderband 8 ist waagerecht ausgerichtet. In einem Winkel dazu ist das obere Förderband 9 geneigt. An dem Ende 10 des oberen Förderbandes 9, das an den Vorratsbehälter 5 angrenzt, entspricht der Abstand zum unteren Förderband 8 mindestens der Dicke des Faserkuchens, hier ca. 30 cm. Der Abstand des oberen Förderbands 9 zum unteren Förderband 8 verringert sich bis zum zweiten Ende 11 des oberen Förderbands auf die vorgegebene Dicke der Multifunktionsplatte, hier 11 mm. Parallel zu den Förderbändern 8 und 9 sind Gebläse angeordnet, die bewirken, dass der Faserkuchen 7 mit erwärmter Luft durchströmt wird. Während der Faserkuchen 7 vom ersten Ende 10 des oberen Förderbandes 9 zu dessen zweiten Ende 11 bewegt wird, verdichten sich die Fasern durch den sich verringernden Abstand zwischen dem oberen und dem unteren Förderband 8, 9 auf die für die jeweilige Multifunktionsplatte 1 vorgesehene Dicke. Gleichzeitig wird der Mantel der Bicofasern bereits vorerwärmt.The
Nach dem Verdichten wird die Multifunktionsplatte 1 zwischen dem unteren Förderband 12 und einem parallel dazu angeordneten, zweiten oberen Förderband 13 in einen Durchlaufofen 14 geführt. Heizeinrichtungen 15, die z. B. über Heizdrähte oder durch Infrarotstrahlung Hitze erzeugen, sind oberhalb und unterhalb der Förderbänder 12 und 13 angeordnet. Optional werden die Heizeinrichtungen 15 durch Gebläse unterstützt, um die erhitzte Luft zu beschleunigen und durch die Förderbänder 12, 13 und die Multifunktionsplatte 1 zu fördern. Die umlaufenden Bänder der Förderbänder 12, 13 sind zu diesem Zweck aus hitzebeständigem, luftdurchlässigen Werkstoff, z. B. einem Metallgeflecht oder einem Gewebe, das trotz der Luftdurchlässigkeit dicht genug ist, um die Holz- und Bicofasern 2, 3 zurückzuhalten.After compression, the
Im Durchlaufofen 14 wird der Mantel der Bicofasern nun weiter so weit erhitzt, dass der Mantel schmilzt bzw. so weit erweicht, dass Holzfasern 2 oder andere Bicofasern 3, die an dem Mantel anliegen, mit dem geschmolzenen oder erweichten Mantel einen Klebepunkt 4 bilden (vgl.
Die so im Durchlaufofen 14 erzeugten Klebepunkte 4 sind zunächst noch weich. Sie weisen mindestens zum Teil noch eine geringe Festigkeit auf, so dass die Rückstellkraft der Holzfasern 2 größer ist als die Festigkeit der Klebepunkte 4. Würde die noch warme Multifunktionsplatte 1 nun aus der Führung der Förderbänder 12, 13 entlassen, bestünde das Risiko von unerwünschten Formveränderungen. Um diese unerwünschten Formveränderungen zu vermeiden, wird die Multifunktionsplatte 1 weiter durch die Förderbänder 12 und 13 in der Höhe fixiert und in eine Vorrichtung 16 zum Abkühlen überführt. Die Vorrichtung 16 zum Abkühlen ist mit Mitteln 17 zum Erzeugen kühler Luft versehen, die durch die Multifunktionsplatte geführt wird. Die Mittel 17 zum Erzeugen kühler Luft können einfache Gebläse sein, die Luft durch die Multifunktionsplatte 1 fördern, die die Umgebungstemperatur aufweist, die außerhalb der Produktionsanlage herrscht. Optional kann zusätzlich eine Kühleinrichtung vorgesehen sein, die die Luft auf eine bestimmte Temperatur kühlt. Erst wenn die Klebepunkte 4 sich durch die Abkühlung so weit verfestigt haben, dass deren Haltekraft größer ist als die Rückstellkraft der Holzfasern 2, wird die Multifunktionsplatte 1 aus der Führung durch die Förderbänder 12, 13 entlassen.The
Die Breite der Multifunktionsplatte 1 beträgt 2800 mm. Die Multifunktionsplatte 1 wird in einem kontinuierlichen Verfahren in unendlicher Länge produziert. Sie kann auf beliebige Längen gekürzt werden, z. B. auf eine Länge von 2070 mm.The width of the
Die vorstehend beschriebene Multifunktionsplatte 1 und das Herstellverfahren für diese Multifunktionsplatte werden erfindungsgemäß so modifiziert, dass zusätzlich zu den Holz- und Bicofasern 2, 3 auch ein oder mehrere Additive zugesetzt werden, z. B. ein Additiv oder eine Mischung von Additiven, aus der Gruppe von Additiven die Fungizide, Insektizide, Algizide und Hydrophobierungsmittel umfasst. Die Additive werden meist in Mengen von bis zu 10 Gew.-% zugesetzt. Sie werden entweder den Holzfasern bereits in der Blow-Line zugesetzt oder sie werden der Mischung aus Holzfasern 2 und Bicofasern 3 insgesamt zugesetzt oder es wird ein zweiter Vorratsbehälter eingesetzt, aus dem eine separate Schicht des Faserkuchens 7 gestreut wird, indem der erste Vorratsbehälter 5 und der zweite Vorratsbehälter alternierend den Faserkuchen 7 streuen. Bevorzugt streut der zweite Vorratsbehälter die Außenlagen des Faserkuchens 7.The
Im Folgenden zeigen einige Ausführungsbeispiele unterschiedliche Rezepturen für die Zusammensetzung und Ausführung der erfindungsgemäßen Multifunktionsplatte:In the following, some examples show different formulations for the composition and design of the multifunction panel according to the invention:
Aus dem Vorratsbehälter werden 56 Gew.-% Bicofasern 3 und 44 Gew.-% Holzfasern 2 gestreut. Zunächst wird in einer ersten Charge ein Faserkuchen 7 mit einer Menge von 1,76 kg/m2 zur Herstellung einer Multifunktionsplatte 1 mit einer Dicke von 11 mm gestreut, verdichtet, erhitzt und gekühlt. In einer zweiten Charge werden 1,98 kg/m2 gestreut und in einer dritten Charge werden 2,75 kg/m2 Fasern gestreut, jeweils zur Herstellung einer Multifunktionsplatte mit 11 mm Dicke. Tabelle 1 zeigt die Dicke (mm), die Dichte (kg/m3), die Druckfestigkeit (kPa), den Wärmedurchlasswiderstand (W/mK) und die Schraubenauszugfestigkeit (N).
Es zeigt sich, dass die Werte für Druckfestigkeit und Schraubenauszugsfestigkeit mit steigender Dichte ansteigen, die Schraubenauszugsfestigkeit sogar deutlich. Der Wärmedurchlasswiderstand steigt ebenfalls moderat.It can be seen that the values for compressive strength and screw pull-out strength increase with increasing density, the screw pull-out strength even significantly. The thermal resistance also increases moderately.
In einer ersten Charge wird ein Fasergemisch aus 30 Gew.-% Bicofasern 3 und 70 Gew.-% Holzfasern 2 in einer Menge von 1,98 kg/m2 auf das untere Förderband 8 gestreut. Die zweite Charge zeigt ein Fasergemisch aus 44 % Bicofasern und 56 Gew.-% Holzfasern und die dritte Charge weist ein Fasergemisch aus 56 Gew.-% Bicofasern 3 und 44 Gew.-% Holzfasern 2 auf. Die zweite und die dritte Charge werden ebenfalls mit 1,98 kg/m2 gestreut. Tabelle 2 zeigt, dass Dicke und Dichte der Platten identisch sind, lediglich der Anteil von Holzfasern 2 und Bicofasern 3 variiert.
Mit steigendem Einsatz von Bicofasern steigen die Festigkeitseigenschaften signifikant. Der Wärmedurchgangswiderstand ändert sich bei variierendem Faseranteil nicht; er ist offenbar von der Dichte der Multifunktionsplatte 1 abhängig.With increasing use of bico fibers, the strength properties increase significantly. The heat transfer resistance does not change with varying fiber content; it is obviously dependent on the density of the
- 11
- Multifunktionsplattemultifunction plate
- 22
- Holzfaserwood fiber
- 33
- Bicofaser (Bicomponentenfaser)Bico fiber (bicomponent fiber)
- 44
- Klebepunktglue point
- 55
- Vorratsbehälterreservoir
- 66
- Zellenradschleuserotary valve
- 77
- Faserkuchenfiber cake
- 88th
- Unteres FörderbandLower Conveyor
- 99
- Oberes FörderbandUpper Conveyor
- 1010
- Oberes EndeTop end
- 1111
- Unteres EndeLower end
- 1212
- Unteres Förderband /DurchlaufofenLower conveyor belt/continuous oven
- 1313
- Oberes Förderband / DurchlaufofenUpper conveyor belt / continuous oven
- 1414
- Durchlaufofencontinuous furnace
- 1515
- Heizeinrichtungenheating devices
- 1616
- Vorrichtung zum AbkühlenDevice for cooling
- 1717
- Mittel zum Abkühlenmeans of cooling
Claims (16)
- A multi-function panel, consisting of wood fibers (2) and bicomponent fibers (3) as well as an additive or a mixture of additives, wherein the wood fibers (2) take up a proportion of 10 wt.% to 90 wt.% and the bicomponent fibers (3) take up a proportion of 90 wt.% to 10 wt.%, wherein the at least one additive or the mixture of additives comprises a group that comprises fungicides, insecticides, algicides and hydrophobing agents and wherein the multi-function panel (1) has a density of 100 kg/m3 to 300 kg/m3.
- The multi-function panel according to claim 1, characterized in that the proportion of wood fibers (2) is up to 70 wt.%, preferably up to 60 wt.%, advantageously up to 55 wt.%, preferably up to 45 wt.%, particularly preferably up to 30 wt.%, and in that the proportion of bicomponent fibers (3) is up to 30 wt.%, preferably up to 45 wt.%, advantageously up to 55 wt.%, preferably up to 60 wt.%, particularly preferably up to 70 wt.%.
- The multi-function panel according to claim 1 or 2, characterized in that the wood fibers (2) are used as agglomerates with a length of 3 mm to 18 mm, advantageously with a length of 6 mm to 12 mm.
- The multi-function material according to at least one of the preceding patent claims, characterized in that the bicomponent fibers (3) comprise polyethylene terephthalate or polyethylene, in each case in isolation or in a mixture, as the core.
- The multi-function material according to at least one of the preceding patent claims, characterized in that the bicomponent fibers (3) comprise co- or iso-polyethylene terephthalate as the sheath.
- The multi-function material according to at least one of the preceding patent claims, characterized in that the sheath of the bicomponent fibers (3) has a lower melting point than the core, in particular the sheath has a melting point of less than 160°C.
- The multi-function material according to at least one of the preceding patent claims, characterized in that the bicomponent fibers (3) have a length of 0.5 mm to 30 mm.
- The multi-function material according to at least one of the preceding patent claims, characterized in that the multi-function panel (1) has a density of 160 kg/m3 to 250 kg/m3.
- The multi-function panel according to at least one of the preceding patent claims, characterized in that the screw-holding capacity of the multi-function panel (1) is over 60 N, advantageously over 100 N, preferably over 150 N.
- A method for producing a multi-function panel (1) consisting of a proportion of wood fibers (2) of 10 wt.% to 90 wt.% and a proportion of bicomponent fibers (3) of 90 wt.% to 10 wt.% as well as an additive or a mixture of additives from a group that comprises fungicides, insecticides, algicides and hydrophobing agents and having a density of 100 kg/m3 to 300 kg/m3, said method comprising the steps of:- mixing wood fibers (2) and bicomponent fibers (3) as well as the additive or mixture of additives,- sprinkling a fiber cake (7),- compressing the fiber cake (7) under pressure,- heating the fiber cake (7) by means of an airflow,- cooling the fiber cake (7) under pressure.
- The method according to claim 10, characterized in that the mixing is done in multiple stages.
- The method according to claim 10 or 11, characterized in that the compression is done by conveying the fiber cake (7) between two conveyor belts (8, 9) arranged in a wedge shape.
- The method according to at least one of claims 10 to 12, characterized in that the conveyor belts (8, 9, 12, 13) comprise an air-permeable conveyor belt.
- The method according to at least one of claims 10 to 13, characterized in that the heating is done at least in part as early as during the compression.
- The method according to at least one of claims 10 to 14, characterized in that the heating is done in a conveyor oven (14).
- The method according to at least one of claims 10 to 15, characterized in that the cooling is done by feeding in accelerated air and/or by feeding in cooled air.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL17186475T PL3444086T3 (en) | 2017-08-16 | 2017-08-16 | Multi-function panel consisting of wood and bicomponent fibres and production metho for a multi-function panel |
EP17186475.4A EP3444086B1 (en) | 2017-08-16 | 2017-08-16 | Multi-function panel consisting of wood and bicomponent fibres and production metho for a multi-function panel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17186475.4A EP3444086B1 (en) | 2017-08-16 | 2017-08-16 | Multi-function panel consisting of wood and bicomponent fibres and production metho for a multi-function panel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3444086A1 EP3444086A1 (en) | 2019-02-20 |
EP3444086B1 true EP3444086B1 (en) | 2022-02-23 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17186475.4A Active EP3444086B1 (en) | 2017-08-16 | 2017-08-16 | Multi-function panel consisting of wood and bicomponent fibres and production metho for a multi-function panel |
Country Status (2)
Country | Link |
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EP (1) | EP3444086B1 (en) |
PL (1) | PL3444086T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020205345B3 (en) * | 2020-04-28 | 2021-07-22 | Gutex Holzfaserplattenwerk H. Henselmann Gmbh + Co Kg | Flexible fiber mat made of wood fibers and bicomponent fibers as a thermoplastic binder as well as a method and device for their production |
DE102020114544A1 (en) | 2020-05-29 | 2021-12-02 | Salamander Industrie-Produkte Gmbh | Extrusion profile, method for producing an extrusion profile and door and / or window system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030134556A1 (en) * | 2001-09-20 | 2003-07-17 | Christie Peter A. | Thermo formable acoustical panel |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102008039720B4 (en) * | 2008-08-26 | 2012-09-13 | Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg | Process for the production of wood fiber insulation boards " |
DE102015119546A1 (en) * | 2015-11-12 | 2017-05-18 | Flooring Technologies Ltd. | Wood-based panel made of a wood-plastic composite material and isocyanate, and a method for their production |
-
2017
- 2017-08-16 EP EP17186475.4A patent/EP3444086B1/en active Active
- 2017-08-16 PL PL17186475T patent/PL3444086T3/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030134556A1 (en) * | 2001-09-20 | 2003-07-17 | Christie Peter A. | Thermo formable acoustical panel |
Also Published As
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PL3444086T3 (en) | 2022-06-20 |
EP3444086A1 (en) | 2019-02-20 |
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