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WO2017118531A1 - Panneau de fibres à résistance accrue contre toute attaque fongique, et procédé de fabrication - Google Patents

Panneau de fibres à résistance accrue contre toute attaque fongique, et procédé de fabrication Download PDF

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Publication number
WO2017118531A1
WO2017118531A1 PCT/EP2016/080584 EP2016080584W WO2017118531A1 WO 2017118531 A1 WO2017118531 A1 WO 2017118531A1 EP 2016080584 W EP2016080584 W EP 2016080584W WO 2017118531 A1 WO2017118531 A1 WO 2017118531A1
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WO
WIPO (PCT)
Prior art keywords
acid
fiberboard
inorganic
fiber mat
treated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2016/080584
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German (de)
English (en)
Inventor
Thomas Kuncinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fritz Egger GmbH and Co OG
Original Assignee
Fritz Egger GmbH and Co OG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fritz Egger GmbH and Co OG filed Critical Fritz Egger GmbH and Co OG
Priority to HRP20191269TT priority Critical patent/HRP20191269T1/hr
Priority to SI201630308T priority patent/SI3383605T1/sl
Priority to EP16819459.5A priority patent/EP3383605B1/fr
Publication of WO2017118531A1 publication Critical patent/WO2017118531A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B27N3/04—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
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
    • 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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity

Definitions

  • the invention relates to a method for producing a fiberboard having increased resistance to fungal attack and a fiberboard obtainable by this method.
  • Another object of the invention is a roof or wall component, which consists of such a fiberboard or contains.
  • the invention relates to the use of an inorganic Brönsted acid in the
  • Fiberboard is widely used in interior and loft conversions as well as in furniture construction, for example as a wall element for exterior or interior use, as a support plate for laminate flooring, for front and rear fronts of furniture or for Unterbeplankung and insulation of roof structures.
  • Different types of fiberboard are known to those skilled in the art. These are described, for example, in “Taschenbuch der Holztechnik” by A. Wagen1.4 and F. Scholz, Hanser Verlag, 2012, on pages 146 to 149.
  • DHF plates vapor-permeable and vapor-permeable are preferably used
  • moisture-resistant fiberboard as under-cover panels for planking roofs and walls used.
  • a good moisture resistance or a good protection against microbial infestation is desired because DHF plates may be exposed to water or moisture for long periods of time. For example, this stress may be due to external weather conditions or evaporation of water in
  • Coal tar oils creosols
  • water-soluble / water-based preservatives boates
  • solvent-containing preservatives triazoles
  • the tar oils have a good antimicrobial efficacy.
  • the water-soluble protective agents are combinations of inorganic salts with mostly water-insoluble organic active ingredients.
  • EP 2 146 571 B1 describes a furniture and / or interior fitting which is antimicrobially treated by impregnation with a resin composition.
  • the resin composition contains a biocidal composition
  • emulsifying effect can additionally promote the swelling of the fiberboard.
  • EP 1 813 402 A2 describes a fiberboard for roofing and wall construction, which contains borates as mold fungus protection in its covering layer.
  • the boron compounds appear to be effective against fungi in principle, but these compounds are water-soluble and not fixed in the fiber material. As a result, they remain easily washable even with the addition of fixing agents and their effect is lost in the course of the application period. Due to the disadvantages described above, many wood preservatives containing biocidal substances, therefore, can not be used optimally in the roof or interior. Furthermore, the biocides may be due to their potential
  • Biocides generally pose the risk of resistance and allergization, which is why their exposure
  • water-based wood preservatives may be removed from time
  • Fiber board to be washed out on the one hand the antimicrobial
  • an object of the invention was to provide a fiberboard with increased
  • Another aspect of the object underlying the invention was to produce an environmentally friendly product, which is characterized by a long-lasting fungus resistance.
  • the invention relates to a method for producing a fiberboard, comprising the steps:
  • step b) treating at least one of the two surfaces of the fiber mat from step a) with an inorganic Bronsted acid,
  • Fiber mat to a fiberboard Fiber mat to a fiberboard.
  • the inventive method is based on known from the prior art process for wood fiber board production, wherein the usual
  • Bronsted acids are well known to those skilled in the art. Examples and properties of Bronsted acids are described, for example, in "Basic Knowledge of Chemistry", C. Mortimer, Thieme, 7th Edition, 2001, pages 281 to 290
  • the inorganic Bronsted acids used according to the invention are neither biocides within the meaning of the biocide regulation nor do they entail the above-described harmful or environmentally harmful disadvantages. Since the inorganic Brönsted acids used according to the invention do not have the health-endangering properties of conventional biocides or wood preservatives and, moreover, can be used in low concentrations, the
  • muscle means the broad definition of the realm of "fungi” from biological taxonomy.
  • unicellulars such as baker's yeast, this also includes multicellulars such as
  • fungus wood-destroying and / or wood-discolouring fungi or infestations by these are meant above all. These wood-destroying and / or wood-discolouring fungi typically damage the wood by, for example, brown rot, white rot, soft rot, mold, blue streaks or red streaks Embodiment is in the
  • the fungi may also be selected from the Basomycetes, Ascomycetes and Deutomycetes.
  • Increase in resistance as used herein is meant a reduction in fungal infestation as compared to a non-biocidal, fungicidal and / or fungiostatic reference.This resistance of fibrin to fungal infestation may be based, for example, on the EN ISO 846: 1997 standard "Determination of the action of
  • the fibers prior to providing the fiber mat, e.g. to be treated with the inorganic Bronsted acid already during defibration, in the digester or in the refiner. In this case, however, the treated fibers would have to undergo an additional thermal step. This can lead to damage to the fiber structure.
  • the process of the invention sees the treatment of the fibers only after their gluing at the stage of the fiber mat, i. in step b). Because of this procedure, the treated fibers only one thermal step, namely the pressing to a
  • Fiber board to be subjected the inventive method is particularly gentle on the fibers.
  • Cell wall polymers that are contained in the fibers and provide a food source for fungi and other microorganisms are modified so that they can no longer serve as a source of food for the fungi. As a result, the fungi are probably no longer able to replicate and / or damage the fibers through their metabolic products.
  • the fiberboards obtained by the process according to the invention are more hydrophobic than comparably produced fiberboards, in the production of which the fibrous mat is not mixed with an inorganic Bronsted acid
  • Fiber board can be reduced. Further, it has been found that this hydrophobing effect acts synergistically with the antifungal effect of treatment with the inorganic Brönsted acid. Without wishing to be bound by any particular scientific theory, the increased hydrophobicity of the surface of the fiberboard is presumably due to the
  • Another advantage of the treatment according to the invention with the inorganic Brönsted acid is that its use can be easily integrated in conventional processes of the wood industry for the production of fiberboard.
  • inventive method is used, is of particular advantage.
  • Aqueous solutions or suspensions work well in the usual way
  • the inorganic Brönsted acid can be applied for example via a blowline. Due to the
  • Wood preservatives is that no other additives, such as
  • Emulsifiers are required to dissolve the inorganic Bronsted acid and can apply to the fiber mat can. As a result, an additional swelling of the fiber board can be avoided. In addition, many inorganic Bronsted acids are available inexpensively.
  • the inventive method is particularly well suited for the production of fiberboard and is not limited to any specific fiber plate type.
  • the fiberboards obtainable by the process may be single-layered or multi-layered.
  • the embodiments described here allow the uncomplicated increase in the fungal resistance of at least one major side of the DHF plate, which is particularly advantageous in that such a DHF Plate with increased resistance to fungal attack can be obtained without costly intermediate steps or further chemical aftertreatment.
  • the DHF plate obtainable according to the invention appears to have increased hydrophobic properties and a smoother surface. This provides additional protection against ingress of water or moisture. Furthermore, it has been found that the major side of the fiberboard treated with the Bronsted inorganic acid has a darker coloration than the remaining areas of the fiberboard which were not treated. The discoloration is probably due to the treatment or reaction of the inorganic Bronsted acid with the lignocellulosic material. Although discolorations of the wood material or the final product are usually not desired by the skilled person, this is of particular advantage in the inventive method, as the successful treatment and / or the uniformity of the
  • Surface treatment can be read on the surface of one of the main sides, in cross section or at the edge surfaces of the fiberboard.
  • the darker color of the treated surface is in fiberboard, especially DHF board, which has only one major side treated, i. have only one main side with increased resistance to fungal attack, also of particular advantage, since due to this darker coloration, the treated main page can be distinguished from the untreated main page. This can be a
  • the usual methods for producing a single-layer or multi-layer fiberboard have the following steps in common: First, the wood material is treated in a digester and then defibered. The comminution or defibration of the wood material is often done in a refiner. Typical process conditions used in industry for comminution or defibration are process temperatures of 160 to 200 ° C and pressures up to 10 bar. Thereafter, the fibers are optionally dried and then glued. The Beieimen the fibers can be done in a Beleimtrommel by spraying. In the production of
  • Fiber boards can be used a variety of binders. Usually, no hardeners are added to the binder in fiberboard manufacture. The glued fibers are finally scattered into a fiber mat, which the person skilled in the art also calls “fiber cake”, optionally preformed and pressed into a fiberboard.
  • the method according to the invention initially provides that in step a) a fiber mat containing glued, lignocellulose-containing fiber is provided.
  • the provision is made in conventional processes for making fiberboard, e.g. by spreading lignocellulosic, glued fibers into a fiber mat.
  • the fibers are first glued and then sprinkled onto a forming belt to form a fiber mat.
  • the fiber mat can be additionally formed in a further step and / or smoothed on its upwardly facing surface.
  • the fiber mat or fiberboard essentially consists of lignocellulosic fibers.
  • essential here means up to 80, 85, 90, 95, 98 or 99 wt .-%, based on the total weight of the fiber mat or the
  • the fiber mat or the fiber board further additives, such as fire retardants, solvents, solubilizers,
  • viscosity adjusting agents wetting agents, emulsifiers, pH adjusting agents, fats, fatty acids or stabilizers.
  • lignocellulosic fibers any type of fiber containing lignocellulose.
  • Lignocellulose in the context of the invention contains lignin as well as cellulose and / or hemicellulose.
  • Cellulose is an unbranched polysaccharide consisting of several hundred to ten thousand cellobiose units These cellobiose units in turn consist of two molecules of glucose which have a ⁇ -l , 4-glycosidic linkage.
  • Hemicellulose is a collective name for
  • the hemicelluloses are branched polysaccharides with a lower chain length - usually less than 500 sugar units - which are composed of different sugar monomers. Hemicellulose is composed essentially of various sugar monomers such as glucose, xylose, arabinose, galactose and mannose, which sugars may have acetyl and methyl substituted groups. They have a random, amorphous structure and are readily hydrolyzable. Xylose and arabinose consist for the most part of sugar monomers with five carbon atoms (pentoses). Mannose or galactose consist mainly of six-carbon sugar monomers (hexoses).
  • Ligans are amorphous, irregularly branched aromatic macromolecules that are found in nature as part of cell walls, where they cause the lignification of the cell composed of substituted phenylpropanol units, have a lipophilic character and are insoluble in neutral solvents, such as water, at room temperature
  • Precursors of lignin are for example p-coumaryl-alcohol, coniferyl-alcohol and sinapyl-alcohol
  • the molecular weights of lignin are usually between 10,000 and 20,000 g / mol.
  • the lignocellulosic fibers are preferably wood fibers. These wood fibers can be produced by defibering of wood particles, wood fibers, wood chips or finely divided wood material. Preferred woods for the
  • Production of a fiberboard obtainable by the process according to the invention are, for example, softwoods, in particular pine and / or spruce wood.
  • the lignocellulosic fibers are glued with a binder before, during and / or after they are scattered into a fiber mat.
  • a binder it may be understood as meaning wholly or partially wetting with a composition containing a binder, and such compositions will be referred to by those skilled in the art as a "sizing liquor”.
  • Bury can in particular also mean the uniform distribution of the binder-containing composition on the lignocellulose-containing fibers.
  • the application of the binder-containing composition can
  • blowline can in addition to the added binders and
  • surface-modifying agents which neutralize the surface and / or encapsulate the fiber may also be sprayed onto the water-repellent agents.
  • the lining of the lignocellulose-containing fibers can also be done in a drum or by spraying on the assembly line.
  • the amount of binder used in gluing or gluing is
  • the binder in an amount of 0.1 to 15 wt .-% based on the
  • Wood dry weight (solid resin / atro) is used.
  • the application of the binder can be carried out, for example, in the blowline known to the person skilled in the art.
  • the method according to the invention is suitable for a large number of binder-wood fiber combinations.
  • binders which can be used according to the invention are aminoplasts, phenoplasts, vinyl acetates, isocyanates, epoxy resins and / or acrylic resins, in particular urea-formaldehyde resin (UF), melamine-formaldehyde resin, phenol-formaldehyde resin (PF), polyvinyl acetate and / or white glue.
  • the binder used for the gluing is a system based on urea-formaldehyde resins (UF), melamine-reinforced urea-formaldehyde resins (MUF), melamine-urea-phenol-formaldehyde resins (MUPF), Phenol-formaldehyde resins (PF), polymeric diisocyanates (PMDI) and / or isocyanates used.
  • UF urea-formaldehyde resins
  • UMF melamine-reinforced urea-formaldehyde resins
  • MUPF melamine-urea-phenol-formaldehyde resins
  • PF Phenol-formaldehyde resins
  • PMDI polymeric diisocyanates
  • PMDI polymeric diisocyanates
  • Binder an isocyanate-based binder. More preferably, that contains
  • Binder is an isocyanate or consists of 80, 90, 95, 99 or 100 wt .-% thereof. Particularly good results are obtained when the isocyanate is a polyisocyanate, in particular polymeric diisocyanate (PMDI).
  • isocyanate is a polyisocyanate, in particular polymeric diisocyanate (PMDI).
  • step b) at least one of the two surfaces of the fiber mat from step a) is treated with an inorganic Bronsted acid.
  • surface of the fiber mat as used herein means the so-called “cover layer” of the fiber mat or fiberboard.
  • the cover layer is the most superficial fiber layer of the fiberboard.
  • surface of the fiber mat is meant the entire surface layer treated with the inorganic Bronsted acid, the thickness of which surface layer being treated is dependent from the penetration depth of the inorganic Brönsted acid.
  • Fibrous plate forms and does not come in contact with the inorganic Brönsted acid.
  • the thickness of the treated surface layer and thus also the penetration depth of the inorganic Bronsted acid into the
  • Fiber mat about 0.01 to 6 mm, preferably 0.01 to 4 mm, and particularly preferably up to 3 mm.
  • only one of the two surfaces of the fiber mat is treated. This is preferably the top of the fiber mat. This is to be distinguished from the underside on which the fiber mat rests.
  • the acid may be sprinkled as a solid or as part of a solid composition, but preferably the acid is used in liquid form, either in concentrated form or as a pure acid or as part of a liquid containing the inorganic Bronsted acid
  • “Liquid” as used herein may mean a dilute inorganic Bronsted acid solution (ie, the liquid then comprises the inorganic Bronsted acid as well as a diluent).
  • liquid as used herein may also generally mean a liquid composition containing the inorganic Bronsted acid, and optionally other components.
  • the treatment in step b) with the inorganic Brönsted acid or the liquid containing the inorganic Brönsted acid can be carried out, for example, by brushing or spraying.
  • the treatment is carried out by spraying, for example by means of a blowline.
  • the treatment can be carried out such that only the inorganic Brönsted acid from step b) presented and then the fiber mat from step a) provided and applied thereto.
  • the presentation can be done for example by spraying. But it is also possible that only the
  • Fiber mat from step a) provided and then at least one of the two
  • the exposure time of the inorganic Bronsted acid i. H. the time that elapses between step b) and c) (eg, time between the initiation of the spraying of the inorganic Bronsted acid to the contacting of the treated fiber mat with the press), 1 to 40 seconds, preferably 2 to 30 seconds and more preferably 2 to 20 seconds.
  • Integrate manufacturing processes for fiber board production can be done by sprinkling glued fibers on a forming belt.
  • one of the two surfaces of the fiber mat rests on the forming belt (referred to herein as the "underside"), while the other of the two surfaces of the fiber mat faces upwards / or on the underside resting on the forming belt.
  • Forming band provided and then treated the upwardly facing surface of the fiber mat with the inorganic Brönsted acid from step b).
  • the inorganic Brönsted acid or the liquid containing it is sprayed on.
  • first the inorganic Brönsted acid or the liquid containing it is placed on the forming belt and then the fiber mat is provided.
  • the presentation of the inorganic Brönsted acid or the liquid containing it is preferably carried out by spraying.
  • the upwardly facing surface is additionally treated with the inorganic Bronsted acid or the liquid containing it. Thereby, a fiber mat which has been treated on both surfaces can be obtained.
  • Seconds preferably 2 to 30 seconds and especially 2 to 20 before the treatment of the top of the fiber mat done.
  • Fiber mat spreading and / or fiber mat forming The treatment preferably takes place after the fiber mat formation and / or shortly before the pressing of the fiber mat into a fiber board.
  • the Brönsted acid in step b) and the compression in step c) can in principle be varied.
  • the time between the treatment with the inorganic Bronsted acid in step b) and the compression in step c) is at least 1, 2, 5, 10 or 15 seconds.
  • the upper limit for the time between treatment with the inorganic Brönsted acid in step b) and the compression in step c) may be 5 minutes, 2 minutes, 40 seconds, 30 seconds or 20 seconds, said lower and upper limits being related to each other can be combined.
  • the time between treatment with the inorganic Brönsted acid in step b) and the compression in step c) 1 to 40 seconds, particularly preferably 2 to 30 seconds and particularly preferably 2 to 20 seconds.
  • an inorganic Bronsted acid is used in step b) of the process according to the invention.
  • the inorganic Bronsted acid is preferably present as (possibly diluted) liquid.
  • the inorganic Bronsted acid is present in the liquid in a concentration of up to 40, 50, 60, 70, 75, 80, 85, 90, 95, 98 or 99% by weight, based on the total weight of the liquid.
  • Particularly preferred as the treatment liquid in step b) is an aqueous solution of the inorganic Brönsted acid.
  • the liquid may also contain other additives, for example release agents.
  • inventive method as part of a liquid composition and / or in a liquid in a concentration of 20 to 85 wt .-%, particularly preferably from 30 to 70 wt .-% and particularly preferably from 40 to 55 wt .-%, based on the Total weight of the liquid used.
  • the liquid is an aqueous solution of the inorganic Brönsted acid, which may also contain other additives.
  • the mass fraction is understood. That is, it means the mass of the inorganic Brönsted acid relative to the total mass of the liquid.
  • the inorganic Bronsted acid to be used according to the invention has
  • pK s is the negative decadic logarithm of the
  • Acid constant Ks at standard conditions The smaller the pKs value, the stronger the acidity. If an acid has several dissociation stages (for example, H2SO4: pKs 1st stage: -3, 2nd stage: 1.92), here, with the p value, the pfö value of 1.
  • PKs values of some important inorganic Brönsted Acids can be found in the table below or, for example, in Gerhart Jander, Karl Friedrich Gonz, Gerhard Schulze, Jürgen Simon (ed.]: partition analyses.
  • the inorganic Bronsted acid can be used alone or in combination with one of its salts, esters or adducts.
  • the preferred amount of the inorganic Bronsted acid which is applied in step b) is 3 to 150 g / m 2 , particularly preferably 15 to 100 g / m 2 and particularly preferably 25 to 75 g / m 2 , based on the Step b) treated surface of the fiber mat.
  • Treated surface means, for example, the entire surface of the top, even if parts of it are recessed, but not the sum of all surfaces of the fiber mat, ie the top, the bottom and the edge surfaces. According to one embodiment, the
  • the inorganic Bronsted acid thereby evenly distributed over the surface of the top and / or bottom.
  • the above g / m 2 data refer to g pure acid per m 2 treated surface. If, for example, 50 g of a 50% strength by weight acid solution are sprayed onto 1 m 2 surface in step b), the amount of acid used here is 25 g / m 2 .
  • the inorganic Bronsted acid is a mineral acid. Examples of mineral acids are phosphoric acid, phosphorous acid, hypophosphorous acid, phosphonic acid, sulfuric acid, sulfurous acid, hydrochloric acid, nitric acid, nitrous acid or mixtures thereof.
  • the inorganic Bronsted acid is preferably selected from the group consisting of phosphoric acid, phosphorous acid, hypophosphorous acid, phosphonic acid or mixtures thereof. Particularly preferred is phosphoric acid, in particular the place io-phosphoric acid used. It is also possible to treat it with a mixture of phosphoric acid and a salt of phosphoric acid.
  • the salts may, for example, be alkali salts, alkaline earth salts and / or ammonium salts.
  • the inorganic Brönsted acid used is phosphoric acid, phosphorous acid, hypophosphorous acid, phosphonic acid or mixtures thereof. Practical experiments have shown that this can reduce the risk of strongly acidic reactions with the lignocellulose-containing material and the concomitant reduction in quality of the lignocellulose-containing fiber or of the end product.
  • Phosphoric acids in the context of this invention are those which have a free HO-P group.
  • Examples of phosphoric acids which can be used according to the invention are orthophosphoric acid, phosphonic acid and / or phosphinic acid.
  • phosphoric acid is particularly ort / io phosphoric acid into consideration.
  • salts of orthophosphoric acid in particular phosphates, hydrogen phosphates and / or dihydrogen phosphates.
  • the salts of phosphoric acid may be, for example, their alkali salts, alkaline earth salts and / or ammonium salts or compounds. Salts of phosphoric acid which can be used according to the invention are also phosphonates and / or phosphinates.
  • the phosphoric acid is used as 20 to 85% by weight, in particular 30 to 70% by weight, solution in water. Particularly good results have been obtained in the treatment with a 40 to 50 wt .-%
  • Phosphoric acid solution adjusted in water may optionally contain further additives.
  • step c) of the process according to the invention the surface-treated fiber mat obtained from step b) is pressed into a fiberboard.
  • a fiberboard In principle, various methods are known to those skilled to compress glued lignocellulose fibers to a fiberboard.
  • step c) is a hot pressing. Suitable temperatures for the compression in step c) of the method according to the invention or one of its
  • Embodiments are temperatures of 150 ° C to 250 ° C, preferably from 160 ° C to 240 ° C, more preferably from 180 ° C to 230 ° C. At temperatures in these ranges, the process can be carried out particularly economically.
  • Pressing temperature of at least about 150 ° C is performed.
  • the pressing factor in hot pressing is preferably 2 to 15 s / mm, preferably 2 to 12 s / mm, and particularly preferably 4 to 12 s / mm.
  • the residence time of the lignocellulose-containing fiberboard in seconds per millimeter thickness or thickness of the finished pressed lignocellulose-containing material is referred to as press factor
  • Lignocellulosic fiberboard be achieved.
  • the fiberboard is a fiberboard, in particular a obtainable by the process according to the invention fiberboard.
  • the fiberboard consists essentially of lignocellulose-containing fibers.
  • essential here means up to 80, 85, 90, 95, 98 or 99 wt .-%, based on the
  • the fiberboard may be a single-layer or multi-layer fiberboard.
  • the fiberboard is a DHF, UDF, LDF, MDF, or HDF board.
  • the fiberboard is a DHF board.
  • the DHF plate according to the invention corresponds to the standard
  • the fiberboard has a thickness of 8 to 30 mm, preferably 10 to 22 mm and particularly preferably 12 to 20 mm.
  • the density can be determined according to EN 323: 93-08.
  • the fibers of the fiberboard are glued with an isocyanate-based binder, preferably a PMDI based. With these binders can be dispensed with the addition of a curing agent.
  • the fiberboard on at least one positive or non-positive connection element in particular a groove and / or spring.
  • at least one of the edge surfaces of the fibreboard can be designed such that it can be connected to another edge surface of another fiberboard.
  • the connection is a tongue and groove connection or bung. It is particularly preferred if the groove, spring and / or bouncing is round, oval, conical or angular.
  • the connection between the fiberboard is form-fitting. Particularly preferred is the compound
  • Tongue-and-groove or bung is understood to be connections that can be put together or nested at their edge surfaces or edges.
  • the two fiberboard panels to be joined can each have a groove on the edge surfaces or edges into which a so-called spring is inserted or inserted as a connecting third component.
  • the at least one of the fiberboard panels to be joined can each have a groove on the edge surfaces or edges into which a so-called spring is inserted or inserted as a connecting third component.
  • the fiber board has an edge surface or edge at least one groove and the other edge surface or edge at least one spring.
  • the fiber board has a groove on at least one edge surface and a spring on at least one other edge surface.
  • Processes according to the invention are obtainable, advantageous in that, in addition to the increased fungal resistance, they can also achieve a sufficiently secured outer skin in roof structures. Moreover, through the tongue and groove or the bung, but also the hydrophobized surface an improved water flow over the surface of the DHF plate can be enabled and the
  • This roof or wall component contains or consists of at least one fiber board, which is produced by the method according to the invention or one of its embodiments. It may be in the fiberboard to a DHF plate with two
  • the DHF board has, as described above, a darker color on the treated surface.
  • This has the advantage that the treated (and thus during installation, for example inward-facing) main side of the roof or wall component, in particular the DHF plate, can be easily distinguished from the untreated main side
  • the invention also generally relates to the use of an inorganic Bronsted acid in fiberboard manufacture to increase the resistance of the fiberboard to fungal attack. Since inorganic Bronsted acids were not previously known as a biocide, this use in fiberboard production was surprising. This is especially true against the background that mushrooms usually prefer an acidic environment for their growth (pH 2 to 4) and therefore it does not suggest to increase the fungus resistance or resistance of a surface by an acid treatment. The person skilled in the art would rather have expected that the acid lowers the pH of the material and thus favors the growth of fungi. In a
  • Embodiment used is phosphoric acid, phosphorous acid, hypophosphorous acid, phosphonic acid and a mixture thereof.
  • Another object of the invention is the use of an inorganic Bronsted acid in the surface treatment of a fiber mat in the Fiberboard production for hydrophobing and / or to increase the
  • Phosphonic acid or a mixture thereof is used.
  • FIGS. 2a and 2b are shown schematically in FIGS. 2a and 2b.
  • Figure 1 shows a fiberboard 1, which was prepared by the process according to the invention.
  • the fiberboard 1 has two main sides 2 and 3, one the top 2 and the other the bottom 3 of
  • Fibrous plate 1 which were each treated in the course of their preparation with an inorganic Brönsted acid in step b).
  • Areas 2 'and 3' outline the topsheets of the two major sides whose resistance to fungal attack was enhanced by the treatment with the inorganic Brönsted acid.
  • These areas 2 'and 3' are optically characterized by a dark color.
  • the remaining surfaces 4 represent the edges of the fiberboard 1.
  • Figure 2a shows schematically the production of a fiberboard according to a
  • Embodiment of the method according to the invention in which one of the two main sides has been treated with an inorganic Brönsted acid in step b).
  • a fiber mat 5 which consists essentially of binder-coated lignocellulosic fibers, a liquid 6 containing an inorganic Brönsted acid from above sprayed.
  • the treated fiber mat 5 is pressed in a hot press 7 under the action of elevated pressure and elevated temperature to the fiberboard 1 '.
  • top 2 and treated topcoat 2 'treated with the inorganic Bronsted acid are oriented upwardly.
  • Figure 2b shows schematically the production of a fiberboard 1 "after a
  • Embodiment of the method according to the invention in which both main sides, i. the top 2 and bottom 3 were treated with an inorganic Brönsted acid in step b).
  • a liquid 6 containing an inorganic Brönsted acid is introduced by spraying on a forming belt 8.
  • the liquid 6 is sprayed onto the upward-facing surface of the fiber mat 5 from above.
  • the fiber mat 5 treated from both main sides is pressed into the fiber plate 1 "in a hot press 7 under the action of elevated pressure and elevated temperature the cover layer 2 "), which has been treated with the inorganic Bronsted acid, is oriented upwards and the underside 3 (or cover layer 3") oriented downwards.
  • the experimental panel 1 was constructed according to an embodiment of the invention, i. with treatment of both surfaces of the
  • Fiber mat with an inorganic Bronsted acid prepared.
  • Binder emulsifiable PMDI (eMDI) type (IBOND MDF EN 4330 / Fa. Huntsman) 2% paraffin emulsion (w / w) - Type Pro A18 (Sasol)
  • Raw material Coniferous wood fibers (pine and spruce wood)
  • the reference plates 1 to 4 were produced in duplicate according to the MDF process commonly used in the wood industry. Reference plates 1 to 4 were prepared without treatment with an inorganic Brönsted acid.
  • the experimental panel 1 was prepared in duplicate according to an embodiment of the method according to the invention. Thereby, a fiberboard was obtained, the two major sides of which had been treated with phosphoric acid during production.
  • the glued fiber mat was additionally included in the fiber mat shaping and shortly before the press entry Phosphoric acid surface treated.
  • the surface treatment was carried out in the order given below:
  • composition of the reference plates 1 to 4 and the experimental plate 1 is in
  • Test plate 1 0.56 N / m 2 The results show that the good mechanical properties were maintained despite the additional treatment with the phosphoric acid.
  • Trial plate 1 to be much smoother than that of the reference plates 1 to 4.
  • test organisms on different culture media see point 3, experiments A, B and B ') incubated over 4 weeks. At the end of the incubation period, the growth of the specimens was visually assessed to control fungal growth (experiment A) or the
  • Test specimen After one-week conditioning (20 ° C, 65% RH) of the
  • Reference plate 2 and the test plate 1 of Example 1 were cut out nine test specimens in the dimension 5x5x0.8 cm.
  • test organisms were first precultivated on malt extract agar plates.
  • the fungal spores were harvested by means of the mineral salt solution with the aid of a Drigalskispatels.
  • This solution was then filtered through an extraction tube with cotton wool (sterile). The germ count was determined with the Thomasch. The final bacterial count was a CFU of 4 ⁇ 10 7 / ml. This solution was diluted with mineral salt solution to a density of 10 6 CFU / ml, thus obtaining the spore suspension for the experiments.
  • the incomplete agar from 3.1.1. with glucose, so that a glucose concentration of 30 g / 1 was obtained. Then glasses with a volume of 750 ml were filled with 150 ml of agar and sealed with a lid, which was provided centrally with a cotton plug, and steam sterilized.
  • test bodies were applied to the incomplete agar (see point 3.1.1.), which was previously inoculated with a spore suspension of the test organisms. If the test body contains no components that can be used for the fungi, the fungi can not develop any mycelium and can overgrow the test specimen or attack the test specimens through their metabolic products. Test A is suitable for assessing the basic resistance of the test bodies to fungal attack in the absence of organic contaminants.
  • test specimens of the reference plate 2 and the test plate 1 of Example 1 were used.
  • the respective test body was applied directly to the agar and incubated at 24 ° C / RH for 4 weeks.
  • test bodies were applied to the complete agar (see point 3.1.2.), which was previously inoculated with a spore suspension of the test organisms.
  • Experiments B and B ' are suitable for assessing the principal fungistatic action or property of the test bodies against fungal attack in the presence of organic contaminants. Even if the test bodies do not contain any nutrients, the fungi can overgrow the test bodies and attack the test bodies through their metabolic products.
  • a growth inhibition on the Test body or on the culture medium (inhibition zone) indicates a fungicidal or fungistatic activity or equipment of the test body.
  • experiment B the respective test body was applied directly to the complete agar and incubated at 24 ° C / RH for 4 weeks.
  • experiment B the complete agar was first incubated until its surface was completely overgrown with the test organisms. Thereafter, the respective test body was applied to the complete agar and incubated at 24 ° C / RH for 4 weeks.
  • Table 2 represents an average of 3 independent visual assessments made by 3 different persons.
  • the reference plate 2 specimens showed a strong to moderate fungal growth in all the tests.
  • the fungal growth extended to the face of the main facing side as well as to the edges of the test specimen
  • the test specimens of test slab 1 were mostly medium to none and only in all tests in one case a strong fungal growth

Landscapes

  • 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)
  • Multicomponent Fibers (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un panneau de fibres, comprenant les étapes consistant à : a) fournir un mat de fibres contenant des fibres encollées contenant de la lignocellulose ; b) traiter au moins l'une des deux surfaces du mat de fibres de l'étape a) au moyen d'un acide de Brönsted inorganique ; et c) comprimer le mat de fibres traité en surface obtenu à l'étape b) pour obtenir un panneau de fibres. L'invention concerne également un panneau de fibres qui peut être obtenu par le procédé selon l'invention. Un autre objet de l'invention est un élément de toit ou mural, lequel contient un panneau de fibres de ce type ou en est constitué. L'invention concerne en outre l'utilisation d'un acide de Brönsted inorganique lors de la fabrication de panneaux de fibres pour augmenter la résistance du panneau de fibres contre toute attaque fongique, ainsi que l'utilisation d'un acide de Brönsted inorganique lors du traitement en surface d'un mat de fibres lors de la fabrication de panneaux de fibres, pour l'hydrofugation du panneau de fibres et/ou pour l'augmentation de la résistance de ce dernier contre toute attaque fongique.
PCT/EP2016/080584 2016-01-04 2016-12-12 Panneau de fibres à résistance accrue contre toute attaque fongique, et procédé de fabrication Ceased WO2017118531A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
HRP20191269TT HRP20191269T1 (hr) 2016-01-04 2016-12-12 Vlaknasta ploča s povećanom otpornošću na gljivičnu infestaciju, te postupak njezine proizvodnje
SI201630308T SI3383605T1 (sl) 2016-01-04 2016-12-12 Vlaknena plošča s povečano obstojnostjo proti plesnobi in postopek za njeno proizvodnjo
EP16819459.5A EP3383605B1 (fr) 2016-01-04 2016-12-12 Panneau de fibres à résistance accrue contre toute attaque fongique, et procédé de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016100078.7A DE102016100078B3 (de) 2016-01-04 2016-01-04 Faserplatte mit erhöhter Beständigkeit gegen Pilzbefall sowie Verfahren zu deren Herstellung
DEDE102016100078.7 2016-01-04

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WO2017118531A1 true WO2017118531A1 (fr) 2017-07-13

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EP (1) EP3383605B1 (fr)
DE (1) DE102016100078B3 (fr)
HR (1) HRP20191269T1 (fr)
SI (1) SI3383605T1 (fr)
WO (1) WO2017118531A1 (fr)

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EP0139530A2 (fr) * 1983-10-19 1985-05-02 Atlantic Richfield Company Préparation d'articles en composite lignocellulosique
EP0267516A2 (fr) * 1986-11-14 1988-05-18 Kurt Held Méthode et appareil pour la fabrication des panneaux de fibres de bois
CA2276891A1 (fr) * 1999-06-24 2000-12-24 Neste Resins Methode de fabrication de panneaux de composites de couleur claire a l'aide de liants de phenol-formaldehyde
GB2364338A (en) * 2000-04-26 2002-01-23 Douglas Cownie Forbes Insulated, vapour-permeable, liquid-impermeable panel
EP1813402A2 (fr) 2006-01-26 2007-08-01 Glunz Ag Plaque en fibres de bois résistant à la moisissure pour toits et murs, et procédé pour sa fabrication
EP2146571B1 (fr) 2007-04-30 2013-05-01 Pfleiderer Holzwerkstoffe GmbH Compositions de resine contenant une composition biocide, materiaux composites et lamines

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EP0139530A2 (fr) * 1983-10-19 1985-05-02 Atlantic Richfield Company Préparation d'articles en composite lignocellulosique
EP0267516A2 (fr) * 1986-11-14 1988-05-18 Kurt Held Méthode et appareil pour la fabrication des panneaux de fibres de bois
CA2276891A1 (fr) * 1999-06-24 2000-12-24 Neste Resins Methode de fabrication de panneaux de composites de couleur claire a l'aide de liants de phenol-formaldehyde
GB2364338A (en) * 2000-04-26 2002-01-23 Douglas Cownie Forbes Insulated, vapour-permeable, liquid-impermeable panel
EP1813402A2 (fr) 2006-01-26 2007-08-01 Glunz Ag Plaque en fibres de bois résistant à la moisissure pour toits et murs, et procédé pour sa fabrication
EP2146571B1 (fr) 2007-04-30 2013-05-01 Pfleiderer Holzwerkstoffe GmbH Compositions de resine contenant une composition biocide, materiaux composites et lamines

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Also Published As

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EP3383605A1 (fr) 2018-10-10
EP3383605B1 (fr) 2019-06-19
HRP20191269T1 (hr) 2019-10-18
SI3383605T1 (sl) 2019-08-30
DE102016100078B3 (de) 2017-04-13

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