EP3455042B1 - Panneau de fibres à résistance accrue contre toute attaque fongique et son procédé de fabrication - Google Patents

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

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Publication number
EP3455042B1
EP3455042B1 EP17721689.2A EP17721689A EP3455042B1 EP 3455042 B1 EP3455042 B1 EP 3455042B1 EP 17721689 A EP17721689 A EP 17721689A EP 3455042 B1 EP3455042 B1 EP 3455042B1
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EP
European Patent Office
Prior art keywords
fibreboard
polymeric
fiberboard
compound
mono
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EP17721689.2A
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German (de)
English (en)
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EP3455042A1 (fr
Inventor
Thomas Kuncinger
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Fritz Egger GmbH and Co OG
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Fritz Egger GmbH and Co OG
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Priority to PL17721689T priority Critical patent/PL3455042T3/pl
Priority to SI201730330T priority patent/SI3455042T1/sl
Publication of EP3455042A1 publication Critical patent/EP3455042A1/fr
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Publication of EP3455042B1 publication Critical patent/EP3455042B1/fr
Priority to HRP20201110TT priority patent/HRP20201110T1/hr
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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
    • B27N1/00—Pretreatment of moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K2200/00—Wooden materials to be treated
    • B27K2200/15—Pretreated particles or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/15—Impregnating involving polymerisation including use of polymer-containing impregnating agents
    • B27K3/153—Without in-situ polymerisation, condensation, or cross-linking reactions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/06—Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/16—Transporting the material from mat moulding stations to presses; Apparatus specially adapted for transporting the material or component parts therefor, e.g. cauls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers

Definitions

  • the invention relates to a fiberboard with increased resistance to fungal attack and a process for its production.
  • Another object of the invention is a roof or wall component which consists of or contains such a fiberboard.
  • the invention further relates to the use of a polymeric mono-guanidine compound in the manufacture of fiberboard to increase the resistance of the fiberboard to fungal attack.
  • Fiberboard is used in a variety of ways in house construction, especially in interior and roof construction, as well as in furniture construction, for example as a wall element for outdoor or indoor use, as a carrier board for laminate floors, for front and rear fronts of furniture or for under-planking and insulation of roof structures.
  • Different types of fiberboard are known to those skilled in the art. These are for example in “ Taschenbuch der Holztechnik "by A. Wagen1.4 and F. Scholz, Hanser Verlag, 2012, on pages 146 to 149 described.
  • plate here or elsewhere, it means a cuboid flat product which is defined by six surfaces: four edge surfaces and an upper and lower side, the upper side and the lower side here together and in delimitation to the Edge surfaces are referred to as “main sides” or “surfaces of the plate”.
  • DHF boards open to diffusion and moisture-resistant fiber boards
  • under-deck boards for cladding roofs and walls.
  • Good moisture resistance or good protection against microbial infestation is desirable here, since DHF boards can be exposed to water or moisture for extended periods. For example, this exposure can be caused by external weather conditions or by evaporating water Interiors, especially in new buildings. In new buildings, after plastering the walls, there is still residual moisture that evaporates over time and rises towards the roof structure.
  • moisture condenses on the DHF panels installed in the roof structure, and mold can form within a short time, especially on the inward-facing surface of the DHF panel. This problem also occurs with insufficiently sealed or damaged roofs (the surfaces of the DHF panel facing outwards can also be affected) and unventilated, cold attics.
  • an increase in the fungal resistance can also be desirable for the edge surfaces of the fiberboard.
  • this aspect mostly fades into the background because the edges usually have a much smaller surface area compared to the main sides of the fiberboard.
  • the edges of the fiberboard are typically in contact with each other during installation, so that the edges are not directly exposed to moisture.
  • a disadvantage of the previously proposed biocides is that they are extremely harmful to health and, on the other hand, are difficult to integrate into and / or incompatible with the resins used in the manufacture of fiberboard.
  • biocide wood preservatives are coal tar oils (creosols), water-soluble / water-based preservatives (borates) or solvent-based preservatives (triazoles).
  • the tar oils show a good antimicrobial activity.
  • the water-soluble protective agents are often combinations of inorganic salts with mostly water-insoluble organic active ingredients. The latter are made water-emulsifiable / dispersible and thus water-dilutable with the aid of emulsifiers or dispersants (therefore "water-based”).
  • Water-based or water-soluble wood preservatives are among others in the EP 2 146 571 B1 and EP 1 813 402 A2 described.
  • the EP 2 146 571 B1 describes a furniture and / or interior fitting that is treated with an antimicrobial treatment by impregnation with a resin composition.
  • the resin composition contains a biocidal composition from an organic biocidal compound (Isothiazolinone) and a nanoscale metal oxide (ZnO, MgO or Al2O3).
  • a disadvantage of such a combination is that emulsifiers are added as solubilizers, which can additionally promote the swelling of the fiberboard due to their emulsifying effect.
  • US 2012/1 5651 7 A1 describes a method for treating wood.
  • the wood to be treated is contacted with a composition containing monoesters, diesters or triesters or a mixture thereof.
  • Also disclosed US 2012/1 5651 7 A1 Chipboard, but not fibreboard.
  • US 2012/164239 A1 relates to a composition and a method for treating wood-based materials to improve their durability.
  • the composition contains C 1 -C 7 monocarboxy esters and optionally PHMG.
  • the EP 1 813 402 A2 describes a fiberboard for roof and wall construction, which contains borates in its top layer as mold protection.
  • the boron compounds generally appear to be effective against fungi, but these compounds are water-soluble and are not fixed in the fiber material. As a result, these remain easily washable even with the addition of fixing agents and their effectiveness is lost over the course of the application.
  • extreme processing temperatures prevail in the manufacture of fiberboard, for example when drying the preliminary or intermediate products of the fiberboard and / or when pressing.
  • the previously proposed wood preservatives can, for example, already be washed out of the intermediate product of the fiberboard during the production process or can be rendered partially or completely ineffective on account of the mechanical and / or thermal treatment.
  • the compatibility with the other substances used in the manufacture of fiberboard must also be taken into account. Reactions between the components can not only lead to instability, but also to undesirable discoloration of the end product. Very few biocides are therefore suitable for processing in a fiberboard.
  • Biocides based on metals such as silver, copper or zinc therefore appear unsuitable. Their accumulation represents a serious problem in the treatment of waste water in municipal sewage treatment plants and compliance with limit values after their thermal use.
  • the biocide is said to remain active over a long period of time. Sufficient fixation of the biocide in the surface of the fiberboard would therefore be desirable.
  • an object of the invention was to be able to produce a fiberboard with increased resistance to fungi without having to use an unstable, washable or risky substance.
  • Another aspect of the object on which the invention is based was to produce an environmentally friendly product which is distinguished by a long-lasting fungus resistance.
  • guanidine derivatives are preferred for the mucous membrane due to their narrow spectrum of action with favorable human toxicological properties - and wound antiseptics used. Because of their retentive effect, they can be found as additional components in skin antiseptics and hand disinfectants, or they are used in combination with other active ingredients.
  • the polymeric mono-guanidine compound had a sufficient antimicrobial activity against the fungi which typically infested wood.
  • the microorganisms to be controlled in skin or surface disinfection differ fundamentally from those that typically infest wood. Bacteria are the main focus in human applications and medical surface disinfection. The microorganisms that typically infest wood or fiberboard are primarily fungi.
  • the polymeric mono-guanidine compounds would be compatible with the process conditions prevailing in the manufacture of fiberboard and the chemicals used therein.
  • the polymeric mono-guanindine compounds used according to the invention surprisingly showed sufficient temperature resistance to high dryer and pressing temperatures.
  • the antimicrobial effect of the polymeric mono-guanidine compounds in fiberboard is probably based on a purely physical principle of action.
  • the polymeric mono-guanidine compounds do not appear to undergo any chemical reaction, metabolism or uptake by the microorganisms.
  • the physical principle of action of the polymeric mono-guanidine compounds appears to be based on an ionic interaction between the cationically modified fiberboard surface and the negatively charged cell walls of the microorganisms.
  • Article 3 (1) (a) defines biocidal products as "any substance or mixture in the form in which it reaches the user and which consists of, contains or produces one or more active substances, which is intended for this purpose is to destroy, deter, render harmless, prevent their effects or otherwise combat them by means other than physical or mechanical action.
  • the concentration of the polymeric mono-guanidine compound which can be used according to the invention in the region of at least one of the two surfaces of the fiberboard is sufficient to obtain a product which is resistant to fungal attack. According to the invention, it has been shown that even small amounts in the area of at least one of the two surfaces of the fiberboard are sufficient to achieve the desired resistance to fungus.
  • Polymeric mono-guanidine compounds which can be used according to the invention are composed of bridged mono-guanidine compounds.
  • Mono-guanidine compounds can also be referred to as imino ureas or as carbamidines.
  • An example of a mono-guanidine compound is guanidine, also referred to as iminomethane diamine, with the empirical formula CH 5 N 3 .
  • Mono-guanidine compounds can be used to bridge the mono-guanidine compounds, for example guanidine, for example by alkylene chains.
  • Mono-guanidine compounds or polymeric mono-guanidine compounds are generally known to the person skilled in the art.
  • mono-guanidine compounds or polymeric mono-guanidine compounds are described, for example, in " Ullmann's Encyclopedia of Technical Chemistry - Volume 12 ", Verlag Chemie, GmbH, 1976, pages 411-419 described.
  • Known examples of mono-guanidine compounds are guanidine and guanidine hydrochloride.
  • a well-known example of a polymeric mono-guanidine compound is polyhexamethylene guanidine.
  • R 1 is an alkylene radical of the general formula (II) - (CH 2 ) m -, (II), where m is an integer between 1 and 16, preferably between 1 and 12, particularly preferably between 1 and 8 and in particular equal to 6.
  • Preferred alkylenediamines of the formula (III) which can be used according to the invention are selected from the group consisting of ethylenediamine, trimethylenediamine, propylenediamine, hexamethylenediamine and mixtures thereof.
  • Preferred examples of the oxyalkylenes which can be used according to the invention are oxyethylene, in particular triethylene glycol and / or oxypropylene.
  • Preferred examples of the oxyalkylene diamines which can be used according to the invention are oxyethylene diamine, in particular triethylene glycol diamine and / or oxypropylene diamine.
  • the guanidine groups contained in the polymeric mono-guanidine compounds can also be present in charged form, in particular as cations in a salt with a counter anion.
  • polymeric mono-guanidine compounds which can be used according to the invention are preferably polymeric mono-guanidine compounds, their salts or a mixture thereof.
  • Polymeric mono-guanidine compounds have only mono-guanidine structural elements as guanidine structural elements.
  • An example of a polymeric mono-guanidine compound which can be used according to the invention is polyhexamethylene guanidine (PHMG), represented in formula (VI).
  • Polymeric mono-guanidine compounds which can be used according to the invention are compounds from the group consisting of polyalkylene guanidines, in particular polyhexamethylene guanidine, polyalkylenediaminguanidines, polyoxyalkylene guanidines, polyoxyalkylenediaminguanidines and their salts.
  • polyhexamethylene guanidine PHMG is used as the polymeric mono-guanidine compound.
  • the salt of the polymeric mono-guanidine compound can be selected from the group consisting of hydrochloride, chloride, hydroxide, phosphate, fluoride, bromide, iodide, formate, acetate, diphosphate, sulfate, sulfide, nitrate, thiocyanate, thiosulfate, carbonate, Maleate, fumarate, tartrate, mesylate, gluconate and toluenesulfonate, with hydrochloride, chloride, hydroxide, phosphate, diphosphate, acetate and carbonate being preferred. Hydrochloride and / or chloride is particularly preferred.
  • the salts of the polymeric mono-guanidine compounds show a lower corrosive effect, so that the metallic devices used in the manufacture of the fiberboard are spared and the range of applications also improves. Independently the lower corrosivity increases the environmental compatibility of the product or its degradation products due to the preferred ions.
  • the polymeric mono-guanidine compound which can be used according to the invention can be used together with or in a mixture with another additive.
  • This additive can be selected from the group consisting of other biocides, quaternary ammonium compounds and mixtures thereof.
  • this additive is a quaternary ammonium compound.
  • the quaternary ammonium compound can be selected from the group consisting of didecyldimethylammonium chloride (DDAC), dimethyloctadecyl [3- (trimethoxysilyl) propyl] ammonium, dimethyltetradecyl [3- (trimethoxysilyl) propyl] ammonium chloride, alkyl (C 12-18 ) dimethylbenzylammonium chloride ( ADBAC (C 12-18 )), alkyl (C 12-16 ) dimethylbenzyl ammonium chloride (ADBAC / BKC (C 12- C 16 )), didecyldimethylammonium chloride (DDAC (C 8-10 )), alkyl (C 12-14 ) dimethylbenzylammonium chloride (ADBAC (C 12-14 )), alkyl (C 12-14 ) ethylbenzylammonium chloride (ADEBAC (C
  • the fiberboard according to the invention has at least one polymeric mono-guanidine compound which is concentrated in the region of at least one of the two surfaces of the fiberboard.
  • the polymeric mono-guanidine compound can be concentrated in the region of both surfaces of the fiber board.
  • concentration of the polymeric mono-guanidine compound is higher in the area of the surface or on the surface of the fiberboard than in the core thereof. In particular, in the area or on the surface of the fiberboard there is the highest concentration of the polymeric mono-guanidine compound in the fiberboard according to the invention.
  • a concentration gradient with respect to the polymeric mono-guanidine compound starting from at least one surface in the direction of the fiber board core, where the concentration of the polymeric mono-guanidine compound is lower than in the region of or on the surface of the fiber board.
  • Fiberboard core as used here, comprises the center of the fiberboard, which results from the cuboid shape of the fiberboard as the intersection of the space diagonals.
  • the fiberboard core means the middle layer around the center of the fiberboard, this layer running essentially parallel to the surface of the fiberboard and having an average layer thickness of 1, 2, 3, 4 or 5 mm.
  • the fiberboard core means the center of the fiberboard or an essentially spherical volume around the center of the fiberboard, the radius of which can be 1, 2, 3, 4 or 5 mm.
  • surface of the fiberboard means the entire surface layer in which the polymeric mono-guanidine compound is concentrated.
  • the thickness of this treated surface layer depends on the penetration depth of the polymeric mono-guanidine compound.
  • the surface layer in which the polymeric mono-guanidine compound is concentrated is that of Delimit middle layer, which forms or comprises the core of the fiberboard and which is preferably essentially free of polymeric mono-guanidine compounds.
  • the thickness of the surface layer in which the polymeric mono-guanidine compound is concentrated, starting from the surface of the fiberboard is at least 0.01, 0.05, 0.1, 0.5, 1, 2, 3 or 5 mm into the inside of the fiberboard.
  • the superficial layer in which the polymeric mono-guanidine compound is concentrated preferably runs essentially parallel to the surface of the fiberboard.
  • thickness e.g. layer thickness or plate thickness
  • average thickness e.g. as an average of 5 thickness measurements at different positions of the fiberboard.
  • the fiberboard according to the invention there is a concentration gradient of polymeric mono-guanidine compound between at least one surface of the fiberboard and its center.
  • the core of the fiberboard in particular has an area which is less than 0.3, 0.1, 0.05 or 0.01% by weight of polymeric mono-guanidine compound, based on the dry weight (atro) of the lignocellulose-containing material , and particularly preferably contains essentially no polymeric mono-guanidine compound in its core.
  • the amount of the polymeric mono-guanidine compound in the fiberboard according to the invention is also expressed as an area concentration, based on the surface, and not as a volume concentration , based on the total volume of the fiberboard. Because of the comparatively small total amount of the polymeric mono-guanidine compounds the costs for the fiberboard according to the invention are only slightly increased compared to a fiberboard without biocide. It is also not necessary to significantly change the process for their manufacture. Ultimately, the amount of foreign substances in the fiberboard is so small that it does not lose its safety from an environmental point of view.
  • polymeric mono-guanidine compounds are also suitable for a large number of fiber-binder combinations.
  • the addition of additional substances can impair the properties of the binder and thus lead to insufficient binder action and / or mechanical properties of the end product.
  • Due to the fiberboard structure chosen according to the invention the concentration of the polymeric mono-guanidine compounds only in the area of at least one of the two surfaces of the fiberboard, such problems can be largely avoided.
  • the fiberboard according to the invention can be a single-layer or multilayer fiberboard.
  • the fiberboard according to the invention preferably consists essentially of fibers containing lignocellulose. “Essentially” here means up to 80, 85, 90, 95, 98 or 99% by weight, based on the total weight of the fiberboard.
  • the fiberboard can contain further additives, for example fire retardants, solvents, solubilizers, viscosity-adjusting agents, wetting agents, emulsifiers, pH-adjusting agents, fats, fatty acids, biocides or stabilizers.
  • Lignocellulose in the sense of the invention contains lignin and cellulose and / or hemicellulose.
  • Cellulose is an unbranched polysaccharide that consists of several hundred to ten thousand cellobiose units. These cellobiose units in turn consist of two molecules of glucose, which are linked via a ⁇ -1,4-glycosidic bond.
  • Hemicellulose is a collective name for various components of plant cell walls. Hemicelluloses are branched polysaccharides with a shorter chain length - usually less than 500 sugar units - which are made up of different sugar monomers.
  • Hemicellulose is essentially made up of various sugar monomers, such as, for example, glucose, xylose, arabinose, galactose and mannose, it being possible for the sugars to have acetyl and methyl-substituted groups. They have a random, amorphous structure and are easy to hydrolyze.
  • Xylose or arabinose mainly consist of sugar monomers with five carbon atoms (pentoses).
  • Mannose or galactose mainly consist of sugar monomers with six carbon atoms (hexoses).
  • “Lignins” are amorphous, irregularly branched aromatic macromolecules, which occur naturally as a component of cell walls and cause the lignification of the cell there.
  • the fiberboard is particularly preferably a DHF, UDF, LDF, MDF or HDF board.
  • the fiber board is a DHF board.
  • the DHF board according to the invention preferably corresponds to the standard EN 14964: 2007-01.
  • the bulk density of the fiberboard is 500 to 700 kg / m 3 , preferably 550 to 650 kg / m 3 and particularly preferably 580 to 625 kg / m 3 .
  • the bulk density can be determined in accordance with EN 323: 93-08.
  • the fiberboard has a thickness of 8 to 30 mm, preferably 10 to 22 mm and particularly preferably 12 to 20 mm.
  • Tongue-and-groove connection or bunging is understood to mean connections which can be plugged together or placed one inside the other at their edge surfaces or edges.
  • the two fibreboards to be connected can each have a groove on the edge surfaces or edges into which a so-called tongue is inserted or inserted as the connecting third component.
  • the fiberboard it is also conceivable for the fiberboard to be put together to have at least one groove on one edge surface or edge and at least one tongue on the other edge surface or edge.
  • the fiberboard has a groove on at least one edge surface and a tongue on at least one other edge surface.
  • a half-width spring can be incorporated into the edge of one of the two components to be connected.
  • This connectivity is particularly advantageous in the case of the DHF panels which can be obtained by the process according to the invention, since in addition to the increased resistance to fungi, they can also be used to achieve adequately fastened external cladding in roof structures.
  • the tongue-and-groove form fit or the bung, but also the hydrophobized surface enable improved water drainage over the surface of the DHF board and the untreated edge surfaces are protected.
  • the process according to the invention is based on processes for producing fiberboard known from the prior art, in addition to the usual process steps, a surface treatment of the fibrous mat with a polymeric mono-guanidine compound is carried out before pressing to form a fiberboard.
  • the usual methods for producing a single or multi-layer fibreboard have the following steps in common: First the wood material is treated in a stove and then fiberized. The wood material is often shredded or defibrated in a refiner. Typical process conditions for shredding or defibration that are common in industry are process temperatures of 160 to 200 ° C and pressures up to 10 bar. Then the fibers are dried if necessary and then glued. The fibers can be glued in a gluing drum by spraying. A wide variety of binders can be used in the production of fiberboard. Usually, no hardener is added to the binder in fibreboard production. The glued fibers are finally scattered into a fiber mat, which the person skilled in the art also calls "fiber cake", possibly preformed and pressed into a fiber board.
  • Another advantage of the treatment according to the invention with the polymeric mono-guanidine compound is that its use can be easily integrated into conventional processes in the wood industry for the production of fiberboard.
  • the water solubility of the polymeric mono-guanidine compound used in the process according to the invention is particularly advantageous. Aqueous solutions or suspensions can be easily integrated into the usual process steps and systems used in the manufacture of fiberboard. No complex intermediate steps or process interruptions are required.
  • the polymeric mono-guanidine compound can be applied, for example, via a blowline. Due to the water solubility of the polymeric mono-guanidine compound, no organic solvents have to be introduced, which on the one hand represent a fire hazard and on the other hand represent an additional, potentially harmful source of emissions.
  • Another advantage over the usual water-based, non-reactive wood preservatives is that no other additives, such as Emulsifiers are required to dissolve the polymeric mono-guanidine compound and to be able to apply it to the fiber mat. This also prevents additional swelling of the fiberboard.
  • the method according to the invention is particularly well suited for the production of fiberboard and is not restricted to any particular fiberboard type.
  • the fiberboard obtainable by the process can have one or more layers.
  • the method according to the invention has proven to be particularly practical for the production of fibrous panels open to diffusion for roof and wall construction (hereinafter referred to as "DHF panels").
  • DHF panels fibrous panels open to diffusion for roof and wall construction
  • the embodiments described here enable the fungus resistance of at least one surface or main side of the DHF plate to be increased in an uncomplicated manner.
  • a particular advantage of this is that a DHF board with increased resistance to fungal attack can be obtained without complex intermediate steps, complex impregnation processes subsequent to the production or further chemical aftertreatment.
  • the method according to the invention initially provides that a fiber mat which contains glued, lignocellulose-containing fibers is provided in step a).
  • fiberboard for example by scattering glue-containing fibers containing lignocellulose into a fiber mat.
  • the fibers are first glued and then scattered onto a forming tape to form a fiber mat.
  • the fiber mat can be additionally shaped and / or smoothed on its upward-facing surface.
  • the fiber mat preferably consists essentially of fibers containing lignocellulose. “Essentially” here means up to 80, 85, 90, 95, 98 or 99% by weight, based on the total weight of the fiber mat.
  • the fiber mat or the fiberboard can contain further additives, for example fire protection agents, solvents, Solubilizers, viscosity-adjusting agents, wetting agents, emulsifiers, pH-adjusting agents, fats, fatty acids or stabilizers.
  • the lignocellulose-containing fibers are glued with a binder before, during and / or after they are sprinkled into a fiber mat.
  • glue it can be understood to mean all or part of the wetting with a composition which contains a binder.
  • Such compositions are also referred to by the person skilled in the art as "glue liquor”.
  • Gluing can in particular also mean the uniform distribution of the binder-containing composition on the lignocellulose-containing fibers.
  • the binder-containing composition can be applied, for example, by impregnation or spraying, in particular in a blowline.
  • surface-modifying agents which neutralize the surface and / or encapsulate the fiber can also be sprayed on in the blowline.
  • the gluing of the lignocellulose-containing fibers can also be done in a drum or by spraying on the conveyor belt.
  • the amount of the binder used in the gluing or gluing is preferably 0.1 to 20% by weight, in particular 1.0 to 16% by weight, more preferably 2.0 to 14.0% by weight or 2.0 up to 10.0% by weight, based on the dry wood weight (solid resin / dry).
  • the binder is used in an amount of 0.1 to 15% by weight based on the dry wood weight (solid resin / dry).
  • the binder can be applied, 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 also urea-formaldehyde resin (UF), melamine-formaldehyde resin, Phenol-formaldehyde resin (PF), polyvinyl acetate and / or white glue.
  • a system based on urea-formaldehyde resins (UF), melamine-reinforced urea-formaldehyde resins (MUF), melamine resin, melamine-formaldehyde resin, melamine-urea-phenol is used as the binder for the gluing Formaldehyde resins (MUPF), phenol-formaldehyde resins (PF), polymeric diisocyanates (PMDI) and / or isocyanates.
  • the binder is preferably an isocyanate-based binder. More preferably, the binder contains an isocyanate or consists of 80, 90, 95, 99 or 100% by weight thereof.
  • the isocyanate is a polyisocyanate, in particular polymeric diisocyanate (PMDI).
  • polymeric diphenylmethane diisocyanate can be used as the polymeric diisocyanate.
  • the method according to the invention further provides that in step b) at least one of the two surfaces of the fiber mat from step a) is treated with a polymeric mono-guanidine compound.
  • surface of the fiber mat means the surface of one of the two main sides of the fiber mat or the later surfaces (or main sides) of the fiberboard as defined above. These surfaces are to be distinguished from the edge surfaces of the fiber mat.
  • surface of the fiber mat as used here means the so-called “cover layer” of the fiber mat or the later fiberboard.
  • the cover layer is the most superficial fiber layer of the fiber mat or the later fiber board.
  • the top layer can be the most superficial layer of a single-layer or multilayer fiberboard obtained therefrom.
  • surface of the fiber mat means the entire surface layer which has been treated with a monopolymer guanidine compound or in which the polymeric mono-guanidine compound is concentrated.
  • the thickness of this treated surface layer depends on the penetration depth of the polymeric mono-guanidine compound.
  • the treated surface layer must be distinguished from the middle layer, which forms the core of the fiber mat and which does not come into contact with the polymeric mono-guanidine compound.
  • the thickness of the surface layer treated (and thus also the depth of penetration of the polymeric mono-guanidine compound into the fiber mat) is at least 0.01, 0.05, 0.1, 0.5, 1, 2, 3 or 5 mm into the interior of the fiber mat or the later fiberboard, viewed from the surface of the fiber mat or the later fiberboard.
  • 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. In another embodiment, only the bottom of the fiber mat or both surfaces (i.e., top and bottom) of the fiber mat are treated.
  • the depth of penetration and thus the thickness of the region in which the polymeric mono-guanidine compound is concentrated can be determined by the person skilled in the art, for example, by varying the amount of the polymeric mono-guanidine compound used for treatment or by varying the exposure time, ie the time which between treatment with the polymeric mono-guanidine compound in step b) and pressing to the fiberboard in step c).
  • polymeric mono-guanidine compound when used in the singular, this includes the plural, in particular several identical polymeric mono-guanidine compounds and several different polymeric mono-guanidine compounds and mixtures thereof.
  • the polymeric mono-guanidine compound can be sprinkled on as a solid or as part of a solid composition.
  • the polymeric mono-guanidine compound is preferably used in the form of or as part of a liquid.
  • Liquid as used herein can mean a dilute solution of the polymeric mono-guanidine compound (i.e. the liquid then comprises the polymeric mono-guanidine compound as well as a solvent or diluent).
  • liquid as used here, can also very generally mean a liquid composition which contains the polymeric mono-guanidine compound and, if appropriate, further components. This liquid can additionally contain other additives, in particular a quaternary ammonium compound.
  • a polymeric mono-guanidine compound is used for surface treatment in step b) of the process according to the invention.
  • the polymer is preferably Mono-guanidine compound as a (possibly diluted) liquid, ie in liquid form.
  • the polymeric mono-guanidine compound is preferably in the liquid in a concentration of 10, 15, 20, 25, 35, 40, 50, 60, 70, 75, 80, 85, 90, 95, 98 or 99% by weight. %, based on the total weight of the liquid. At a concentration of 10% by weight, this means that 10 g of the pure polymeric mono-guanidine compound are weighed out and made up to 100 g with the liquid.
  • An aqueous solution of the polymeric mono-guanidine compound is particularly preferably used as the treatment liquid in step b).
  • the liquid can also contain other additives, for example release agents and / or quaternary ammonium compounds.
  • the polymeric mono-guanidine compound is preferably used as part of a liquid composition and / or in a liquid in a concentration of 10 to 85% by weight, particularly preferably 20 to 70% by weight and particularly preferably from 25 to 55% by weight, based on the total weight of the liquid.
  • the liquid is an aqueous solution of the polymeric mono-guanidine compound, which can also contain other additives.
  • concentration by mass of the polymeric mono-guanidine compound given here in “% by weight” or “% by weight” is understood. This means that the mass of the polymeric mono-guanidine compound is based on the total mass of the liquid.
  • the preferred amount of the polymeric mono-guanidine compound which is applied in step b) is 2 to 200 g / m 2 , particularly preferably 4 to 80 g / m 2 and particularly preferably 6 to 30 g / m 2 , based on the surface of the fiber mat treated in step b).
  • Treated surface means, for example, the total surface of the top surface, even if parts of it are left out, but not the total sum of all surfaces of the fiber mat, ie the top surface, the bottom surface and the edge surfaces.
  • the polymeric mono-guanidine compound is distributed uniformly over the surface of the top and / or the bottom.
  • the polymeric mono-guanidine compound is PHMG, its salt and / or a mixture thereof.
  • PHMG is particularly preferred, in particular PHMG * HCl.
  • PHMG is used as a 10 to 85% by weight, in particular 20 to 70% by weight, solution in water. Particularly good results have been obtained with the treatment with a 25 to 55% by weight PHMG solution in water.
  • These solutions can optionally contain other additives.
  • the treatment of at least one of the surfaces of the fiber mat in step b) of the method according to the invention can be integrated in a simple and inexpensive manner into already conventional production processes for the production of fiberboard.
  • the fiber mat can be provided by sprinkling glued fibers onto a forming belt.
  • one of the two surfaces of the fiber mat lies on the forming belt (here called "underside"), while the other of the two surfaces of the fiber mat points upwards.
  • the treatment with the polymeric mono-guanidine compound from step b) can be carried out on the top side and / or on the bottom side lying on the molding tape.
  • the treatment in step b) with the polymeric mono-guanidine compound or the liquid containing polymeric mono-guanidine compound can be carried out, for example, by brushing on or spraying on.
  • treatment is by spraying, e.g. using a blowline.
  • the treatment can furthermore be carried out by first introducing the polymeric mono-guanidine compound from step b) and then providing and applying the fiber mat from step a).
  • the presentation can e.g. done by spraying.
  • the fiber mat from step a) is first provided and then at least one of the two surfaces is treated with the polymeric mono-guanidine compound from step b).
  • the fiber mat is first provided on a shaping belt and then the surface of the fiber mat facing upward is treated with the polymeric mono-guanidine compound from step b).
  • the polymeric mono-guanidine compound or the liquid containing it is sprayed on.
  • the polymeric mono-guanidine compound or the liquid containing it is initially placed on the forming belt and then the fiber mat is provided.
  • the polymeric mono-guanidine compound or the liquid containing it is preferably introduced by spraying.
  • the surface facing upward is additionally treated with the polymeric mono-guanidine compound or the liquid containing it.
  • both surfaces of the fiber mat are treated with the polymeric mono-guanidine compound, the underside being treated first.
  • the treatment time of the bottom 1 up to 40 seconds, preferably 2 to 30 seconds and in particular 2 to 20 seconds before the treatment of the top of the fiber mat.
  • the treatment is advantageously carried out during or after the usual fiber mat scattering and / or fiber mat shaping.
  • the treatment is preferably carried out after the fiber mat has been formed and / or shortly before the fiber mat is pressed into a fiber board.
  • the contact time or the time between treatment with the polymeric mono-guanidine compound in step b) and pressing in step c) can in principle be varied.
  • the time between treatment with the polymeric mono-guanidine compound in step b) and pressing in step c) is at least 1, 2, 5, 10 or 15 seconds.
  • the upper limit for the time between treatment with the polymeric mono-guanidine compound in step b) and pressing in step c) can be 5 minutes, 2 minutes, 40 seconds, 30 seconds or 20 seconds, the lower and Upper limits can be combined.
  • the time between treatment with the polymeric mono-guanidine compound in step b) and pressing in step c) is preferably 1 to 40 seconds, particularly preferably 2 to 30 seconds and particularly preferably 2 to 20 seconds.
  • step c) the surface-treated fiber mat obtained from step b) is pressed to form a fiberboard.
  • Step c) is preferably a hot pressing.
  • Suitable temperatures for pressing in step c) of the process according to the invention or one of its embodiments are temperatures from 150 ° C. to 250 ° C., preferably from 160 ° C. to 240 ° C., particularly preferably from 180 ° C. to 230 ° C. At temperatures in these Areas, the process can be carried out particularly economically. Optimal results can be achieved if the pressing is carried out at a pressing temperature of at least about 150 ° C.
  • the press 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 term press factor here means in particular the dwell time of the lignocellulose-containing fiberboard in seconds per millimeter thickness or thickness of the finished pressed lignocellulose-containing fiberboard in the press.
  • the invention also provides fiberboard that can be obtained by the process described above.
  • Another object of the invention is a roof or wall component, in particular one for house construction.
  • This roof or wall component contains or consists of at least one fiberboard according to the invention.
  • the at least one polymeric mono-guanidine compound is concentrated in the area of the surface, which, in relation to the building of the house, points inwards.
  • the fiberboard is therefore preferably oriented within the roof or wall component in such a way that the internal surface, based on the house construction, belongs to the area in which the at least one polymeric mono-guanidine compound is concentrated.
  • the fiberboard can, for example, have been produced by the method according to the invention or one of its embodiments.
  • the fiberboard is preferably a DHF board with two different surfaces.
  • the inner surface of the DHF plate based on the house construction, was preferably treated with a polymeric mono-guanidine compound in step b).
  • the polymeric mono-guanidine compound is compatible with the manufacturing process and fiberboard manufacturing conditions. In particular, it does not appear to react with components of the fiberboard that could lead to undesirable discoloration of the product. By using the polymeric mono-guanidine compound, undesirable discoloration of the product is largely avoided.
  • a product with a uniform coloring of the surface can be obtained. If both surfaces of the fiberboard or the roof or wall component are not treated, one of the sides, in particular the treated surface, can be marked to distinguish the treated from the untreated surface of the fiberboard or the roof or wall component.
  • the fiberboard or roof or wall components according to the invention can therefore contain such a marking.
  • the invention also relates generally to the use of a polymeric mono-guanidine compound in the manufacture of fiberboard to increase the resistance of the fiberboard to fungal attack.
  • the above statements regarding the fiberboard according to the invention and the method according to the invention apply accordingly to the use according to the invention.
  • Polymeric mono-guanidine compounds have not previously been known as a biocide in fiberboard manufacture. Their possible use in the manufacture of fiberboard was surprising for the person skilled in the art. This is especially true against the background that wood or fiberboard is attacked by another spectrum of microorganisms, in particular fungi, whereas the polymeric mono-guanidine compounds in their previous use have been used primarily against bacteria.
  • fungus means the broad definition for the realm of the "fungi” from biological taxonomy. In addition to unicellular organisms such as baker's yeast, this also includes multicellular organisms such as molds or stand fungi. "Fungus” here means above all wood-destroying and / or wood-discoloring fungi or the infestation by them. These wood-destroying and / or wood-discoloring fungi typically damage the wood by, for example, brown rot, white rot, mold rot, mold, blueness or red streaking. According to one embodiment, the fungi are molds and / or blue stains.
  • the fungi can also be selected from the Basomycetes, Ascomycetes and Deutomycetes.
  • increasing resistance as used here is meant a reduction in fungal attack compared to a non-biocidal, fungicidal and / or fungistatic reference. This resistance of the fiberboard to fungal attack can be determined, for example, in accordance with the standard EN ISO 846: 1997 "Determination of the Effect of Microorganisms on Plastics" as described in the exemplary embodiments.
  • the invention also provides for the use of a polymeric mono-guanidine compound in the surface treatment of a fiber mat in the manufacture of fiberboard to increase the resistance of the fiberboard to fungal attack, in particular the use in the inventive method described above. Particularly good results are obtained when PHMG, a salt thereof or a mixture thereof is used.
  • test panels 1 and 2 were produced in accordance with one embodiment of the invention, ie by treating both surfaces of the fiber mat with a polymeric mono-guanidine compound.
  • the reference plate was produced in duplicate using the MDF process used in the wood industry.
  • the reference plate was made without treatment with PHMG.
  • test panels 1 and 2 were produced in duplicate according to one embodiment of the method according to the invention. This gave fiberboard, the two main sides of which had been treated with PHMG during manufacture.
  • the amount of PHMG in steps 1) and 3) was 48 g / m 2 for test plate 1 per surface and 24 g / m 2 for test plate 2 per surface
  • composition of the reference plate and the test plates is summarized in Table 1.
  • ⁇ b> tab. 1 Composition of the fiberboard Treatment with PHMG (amount of PHMG [g / m 2 ]) eMDI (w / atro fibers) Reference plate No 3% Test panel 1 Yes (48 g / m 2 ) 3% Test panel 2 Yes (24 g / m 2 ) 3%
  • Test plate 2 showed the same swelling as the reference plate.
  • Test plate 1 showed only a slight increase in swelling.
  • test panels 1 and 2 even showed a slightly higher strength than the reference panel.
  • test plate 2 showed approximately the same mechanical properties as test plate 1. This was surprising since test plate 1 had a slightly higher swelling, which is why the skilled worker would have expected a decrease in tensile strength.
  • test plates 1 and 2 When comparing the color of the reference plate and test plates 1 and 2, it was found that test plates 1 and 2 showed no discoloration in comparison to the reference plate.
  • test specimens of the reference plate and test plate 1 from Example 1 were incubated for 4 weeks with a test organism on different nutrient media (see point 3, tests A, B and B '). After the incubation period, the growth of the test specimens became visual assessed to determine fungal growth (test A) or fungistatic activity (test B, B ') (see point 4, evaluation).
  • Test specimen After one-week air conditioning (20 ° C, 65% RH) of the reference plate and test plate 1 from Example 1, nine test specimens measuring 5 x 5 x 0.8 cm were cut out.
  • Test organism Penicillum sp.
  • Stock mineral salt solution 2 g NaNO 3 0.7 g KH 2 PO 4 0.393 g K 2 HPO 4 H 2 O 0.5 g KCl 0.5 g MgSO 4 7H 2 O dissolved in 1000 ml tap water (pH 6 - 6.5)
  • About 0.1 g of Tween 80 was added to 1 L of stock mineral salt solution, the solution was then sterilized.
  • test organism was first pre-cultivated on malt extract agar plates. After the agar surfaces were completely overgrown, the fungal spores were harvested using the mineral salt solution with the aid of a Drigalski spatula.
  • This solution was then filtered through an extraction tube with cotton (sterile). The number of bacteria was determined with the Thomas Chamber. The final bacterial count was a CFU of 4 x 10 7 / ml. This solution was diluted with mineral salt solution to a density of 10 6 CFU / ml and the spore suspension for the experiments was obtained.
  • the incomplete agar from point 3.1.1. provided with glucose so that a glucose concentration of 30 g / l was obtained.
  • glasses with a volume of 750 ml were filled with 150 ml of agar and closed with a lid, which was provided with a cotton plug in the middle, and steam-sterilized.
  • test A the test specimens were applied to the incomplete agar (see item 3.1.1.), which had previously been inoculated with a spore suspension of the test organism. If the test specimen contains no components that can be used by the fungi, the fungi cannot develop a mycelium and overgrow the test specimen or attack the test specimens through their metabolic products. Experiment A is suitable for to assess the basic resistance of the test specimens against fungal attack in the absence of organic contaminants.
  • test specimens each of the reference plate and test plate 1 from Example 1 were used.
  • the incomplete agar from point 3.1.1. inoculated with 200 ⁇ l of the spore suspension from point 2.
  • the respective test body was applied directly to the agar and incubated at 24 ° C / 90% RH for 4 weeks.
  • test specimens each of the reference plate and test plate 1 from example 1 were used in tests B and test B '.
  • the complete agar from point 3.1.2. inoculated with 200 ⁇ l of the spore suspension from point 2.
  • test B the respective test specimen was applied directly to the complete agar and incubated at 24 ° C./90% RH for 4 weeks.
  • experiment B the entire agar was first incubated until its surface was completely covered with the test organism. The respective test specimen was then applied to the complete agar and incubated at 24 ° C./90% RH for 4 weeks.
  • test specimens of the reference plate there was predominantly a strong to medium fungal growth.
  • test specimens, which were rated "medium” the fungal growth extended to the surface of the main side pointing upwards and to the edges of the respective test specimen.
  • test specimens of the test plate there was mainly no to medium fungal growth in all tests.
  • the fungal growth In the test specimen, which was rated “medium”, the fungal growth only extended to the edges of the respective test specimen.
  • the area of the upward-facing main page that had been treated with PHMG was not overgrown.

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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)
  • Multicomponent Fibers (AREA)

Claims (21)

  1. Panneau de fibres fabriqué par compression de fibres encollées, contentant de la lignocellulose au moyen d'un liant, dans un procédé qui comprend les étapes suivantes:
    a) mis à disposition d'un mat de fibres qui comprenddes fibres encollées, contentant de la lignocellulose;
    b) traiter au moins une des deux surfaces du mat de fibres de l'étape a) avec un composé polymère à base de monoguanidine ;
    c) compresser le mat de fibres, qui a fait l'objet d'un traitement superficiel, que l'on obtient à l'étape b), pour obtenir un panneau de fibres ;
    dans lequel
    - au moins un composé polymère à base de monoguanidine est concentré dans la zone d'au moins une des deux surfaces du panneau de fibres ;
    - entre au moins une surface du panneau de fibres et son point central, il existe un gradient de concentration du composé polymère à base de monoguanidine, et le panneau de fibres présente à cet égard, dans sa partie centrale, une zone dans laquelle la concentration du composé polymère à base de monoguanidine est inférieure à celle en vigueur dans la zone de la surface du panneau de fibres.
  2. Panneau de fibres selon la revendication 1, caractérisé en ce que le composé polymère à base de monoguanidine est choisi parmi le groupe constitué par un composé polymère à base de monoguanidine, son sel et un de leurs mélanges.
  3. Panneau de fibres selon la revendication 1 ou 2, caractérisé en ce que le composé polymère à base de monoguanidine est la polyhexaméthylèneguanidine (PHMG).
  4. Panneau de fibres selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la zone d'au moins une des deux surfaces du panneau de fibres, dans laquelle le composé polymère à base de monoguanidine est concentré, s'étend, à partir de la surface du panneau de fibres, sur une distance d'au moins 0,01, 0,05, 0,1, 0,5, 1, 2, 3 ou 5 mm vers l'intérieur du panneau de fibres.
  5. Panneau de fibres selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le panneau de fibres, dans sa partie centrale, présente une zone qui contient moins de 0,3, de 0,1, de 0,05 ou de 0,01 % en poids, en référence à la masse sèche (atro) de la matière contentant de la lignocellulose, et de manière particulièrement préférée, ne contient aucun composé polymère à base de monoguanidine dans sa partie centrale.
  6. Panneau de fibres selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le panneau de fibres présente le composé polymère à base de monoguanidine dans la zone d'au moins une des deux surfaces du panneau de fibres dans une concentration superficielle de 2 à 200 g/m2, de préférence de 4 à 80 g/m2, et de manière particulièrement préférée de 6 à 30 g/m2, en référence à la surface respective du panneau de fibres.
  7. Panneau de fibres selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le panneau de fibres présente une masse volumique apparente de 500 à 700 kg/m3, de préférence de 550 à 650 kg/m3, et de manière particulièrement préférée de 580 à 625 kg/m3, et/ou une épaisseur de 6 à 30 mm, de préférence de 10 à 22 mm, et de manière particulièrement préférée de 12 à 20 mm.
  8. Panneau de fibres selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le panneau de fibres est un panneau DHF, UDF, LDF, MDF ou HDF.
  9. Panneau de fibres selon l'une quelconque des revendications 1 à 8, caractérisé en ce que les fibres contentant de la lignocellulose sont des fibres de bois.
  10. Procédé pour la fabrication d'un panneau de fibres selon l'une quelconque des revendications 1 à 9, comprenant les étapes suivantes :
    a) mis à disposition d'un mat de fibres, qui comprend des fibres encollées, contentant de la lignocellulose;
    b) traiter au moins une des deux surfaces du mat de fibres de l'étape a) avec un composé polymère à base de monoguanidine ;
    c) compresser le mat de fibres, qui a fait l'objet d'un traitement superficiel, que l'on obtient à l'étape b), pour obtenir un panneau de fibres ;
    dans lequel on fabrique un panneau de fibres selon l'une quelconque des revendications 1 à 9.
  11. Procédé selon la revendication 10, caractérisé en ce que, le composé polymère à base de monoguanidine utilisé à l'étape b) est utilisé dans un liquide en une concentration de 10 à 85 % en poids, de préférence, de 20 à 70 % en poids, et de manière particulièrement préférée de 25 à 55 % en poids, en référence au poids total du liquide.
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce que la quantité du composé polymère à base de monoguanidine appliqué au cours du traitement à l'étape b) s'élève de 2 à 200 g/m2, de préférence de 4 à 80 g/m2, et de manière particulièrement préférée de 6 à 30 g/m2, en référence à la surface du mat de fibres, traitée à l'étape b).
  13. Procédé selon l'une quelconque des revendications 10 à 12, caractérisé en ce que le traitement à l'étape b) a lieu par pulvérisation du composé polymère à base de monoguanidine ou du liquide qui contient le composé polymère à base de monoguanidine.
  14. Procédé selon l'une quelconque des revendications 10 à 13, caractérisé en ce que le temps entre le traitement avec le composé polymère à base de monoguanidine à l'étape b) et la compression à l'étape c) s'élève de 1 à 40 secondes, de préférence de 2 à 30 secondes, et de manière particulièrement préférée de 2 à 20 secondes.
  15. Procédé selon l'une quelconque des revendications 10 à 14, caractérisé en ce que les fibres encollées, contentant de la lignocellulose procurées à l'étape a) ont été encollées avec un liant à base d'isocyanate, en particulier avec un liant à base de PMDI.
  16. Procédé selon l'une quelconque des revendications 10 à 15, caractérisé en ce que, à l'étape b), on traite les deux surfaces du mat de fibres.
  17. Procédé selon l'une quelconque des revendications 10 à 16, caractérisé en ce que la compression, à l'étape c), est effectuée à une température de 150 °C à 250 °C, de préférence de 160 °C à 240 °C, de manière particulièrement préférée de 180 °C à 230 °C et/ou avec un facteur de compression de 2 à 15 s/mm, de préférence de 2 à 12 s/mm, et de manière particulièrement préférée de 4 à 12 s/mm.
  18. Élément de toit ou de mur contenant ou constitué par le panneau de fibres selon l'une quelconque des revendications 1 à 9.
  19. Élément de toit ou de mur selon la revendication 18, dans lequel, en ce qui concerne le panneau de fibres, il s'agit d'un panneau DHF possédant deux surfaces différentes, caractérisé en ce que, dans la surface du panneau DHF situé à l'intérieure, en référence à la construction du bâtiment, au moins un composé polymère à base de monoguanidine est concentré dans la zone d'au moins une des deux surfaces du panneau DHF.
  20. Utilisation d'un composé polymère à base de monoguanidine lors de la fabrication d'un panneau de fibres dans le but d'augmenter la résistance du panneau de fibres selon l'une quelconque des revendications 1 à 9 par rapport à l'attaque fongique.
  21. Utilisation d'un composé polymère à base de monoguanidine selon la revendication 20, caractérisé en ce que le composé polymère à base de monoguanidine est utilisé lors du traitement superficiel d'un mat de fibres dans la fabrication d'un panneau de fibres dans le but d'augmenter la résistance du panneau de fibres par rapport à l'attaque fongique.
EP17721689.2A 2016-05-09 2017-05-05 Panneau de fibres à résistance accrue contre toute attaque fongique et son procédé de fabrication Active EP3455042B1 (fr)

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PL17721689T PL3455042T3 (pl) 2016-05-09 2017-05-05 Płyta pilśniowa o podwyższonej odporności na atak grzybów oraz sposób jej wytwarzania
SI201730330T SI3455042T1 (sl) 2016-05-09 2017-05-05 Vlaknena plošča z boljšo odpornostjo proti plesnobi in postopek za izdelavo le-te
HRP20201110TT HRP20201110T1 (hr) 2016-05-09 2020-07-15 Vlaknasta ploča s povećanom otpornošću na gljivičnu infestaciju

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DE102016108551.0A DE102016108551B3 (de) 2016-05-09 2016-05-09 Faserplatte mit erhöhter Beständigkeit gegen Pilzbefall sowie Verfahren zu deren Herstellung
PCT/EP2017/060813 WO2017194420A1 (fr) 2016-05-09 2017-05-05 Panneau de fibres à résistance accrue contre toute attaque fongique et son procédé de fabrication

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US11186993B2 (en) * 2017-10-24 2021-11-30 Thomas L. Kelly Enhanced roofing cover board
DE102017010366A1 (de) * 2017-11-09 2019-05-09 Fritz Egger Gmbh & Co. Og Harz-Zusammensetzung, Harzbeschichtung, diese enthaltende Laminate und Imprägnate sowie Verfahren zu deren Herstellung

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GB0010187D0 (en) * 2000-04-26 2000-06-14 Forbes Douglas C Improvements relating to construction
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HRP20201110T1 (hr) 2020-10-30
EP3455042A1 (fr) 2019-03-20
WO2017194420A1 (fr) 2017-11-16
DE102016108551B3 (de) 2017-11-02
SI3455042T1 (sl) 2020-09-30
PL3455042T3 (pl) 2020-11-02

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