WO2012113913A1 - Combinaisons de bois-plastique, procédé de fabrication et utilisation - Google Patents

Combinaisons de bois-plastique, procédé de fabrication et utilisation Download PDF

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Publication number
WO2012113913A1
WO2012113913A1 PCT/EP2012/053174 EP2012053174W WO2012113913A1 WO 2012113913 A1 WO2012113913 A1 WO 2012113913A1 EP 2012053174 W EP2012053174 W EP 2012053174W WO 2012113913 A1 WO2012113913 A1 WO 2012113913A1
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WO
WIPO (PCT)
Prior art keywords
wood
wpc
substrate
plastic
fibrous
Prior art date
Application number
PCT/EP2012/053174
Other languages
German (de)
English (en)
Inventor
Gerd Jonas
Bernd Petri
Alpertunga KÜKSAL
Original Assignee
Evonik Röhm Gmbh
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 Evonik Röhm Gmbh filed Critical Evonik Röhm Gmbh
Publication of WO2012113913A1 publication Critical patent/WO2012113913A1/fr

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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
    • 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
    • B27N3/28—Moulding or pressing characterised by using extrusion presses
    • 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
    • B27N5/00—Manufacture of non-flat articles
    • B27N5/02—Hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B29C48/152—Coating hollow articles the inner surfaces thereof
    • B29C48/153—Coating both inner and outer surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
    • B29C48/525—Conical screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means

Definitions

  • the invention is directed to wood-plastic combinations, processes for their preparation and the use of the thus obtained wood-plastic combinations.
  • the invention relates to an improved wood-plastic combination comprising a WPC substrate (wood plastic composites substrate) for use as a noise control component in the construction and construction industries.
  • WPC substrate wood plastic composites substrate
  • WPC comes from a combination of wood fibers or particles with a plastic matrix (usually thermoplastic)
  • Plastics and is mainly produced by extrusion or injection molding.
  • the known WPC materials can not be used effectively in noise protection. Due to the materials used, WPC materials are generally subject to outdoor changes as a result of weathering unless they are protected by a surface finish. In addition, the noise protection properties of known WPC materials are not sufficient.
  • Wood shavings or chips that are glued together by special concrete or cement types to be used as a porous, textured surface layer on a cast concrete slab as a sound absorbing layer.
  • the disadvantage of such elements is their considerable weight due to the concrete used.
  • used materials should be as recyclable as possible. It should also be a procedure to provide such products, as well as to indicate the use of these products.
  • the subject-matter of the independent method claim provides a solution to the claims underlying the invention with respect to the method.
  • a wood-plastic combination comprises a WPC substrate (wood plastic composites substrate) in conjunction with a layer and / or filling of particulate and / or fibrous, interwoven material succeeds in not without
  • the wood-plastic combination according to the invention has a simple structure, is inexpensive, can be made of recycled material and is itself recyclable.
  • the wood-plastic combination according to the invention can be used outstandingly for soundproofing. Depending on the embodiment, this is achieved by a combination of sound-absorbing and sound-reflecting
  • the wood-plastic combination according to the invention can be designed in such a way that values for the absorption of sound are achieved which meet all relevant standards.
  • the wood-plastic combination according to the invention is versatile and variable adaptable to all requirements, in particular, it has a low weight and is particularly weather-resistant.
  • the method for producing the wood-plastic combinations according to the invention is easy to carry out and can be carried out only with comparatively low costs. The process is based on existing machines and can thus be implemented quickly and inexpensively at the factories.
  • the wood-plastic combination according to the invention comprise a WPC substrate (wood plastic composites substrate) in conjunction with a layer and / or filling of particulate and / or fibrous, interwoven material. It follows that the wood-plastic combination according to the invention has at least two components. On the one hand a WPC substrate, on the other hand a particulate or particulate and / or fibrous, interwoven material. These two components are within the meaning of the invention in a certain relationship to one another and connection with each other.
  • the term "communicating with one another” means in the context of the invention that the two components form a combination with one another, which can be realized by a solid and permanent connection, for example in layer form, but it is equally possible for the component of the The connection of the two components can be solid and durable, but the connection can also be made loosely and detachably.
  • WPC substrates according to the invention are known per se to the person skilled in the art. It is a combination of an organic biomaterial with a matrix binder.
  • Successful materials for the organic biomaterial portion of the WPC substrate include, but are not limited to, shredded or ground wood, wood chips, wood pellets or wood waste such as sawdust, but also other wood-like ones
  • Biomaterials such as nutshell flour, pulp, chitin, flour from kernels of various fruits, fibrous, pulverizable or ground in any way biomass.
  • wood is particularly preferred. Wood is used in all possible forms, ranging from wood flour (easy to dose, but hardly reinforcing properties) on wood fibers with different geometries to the pellets (easy to feed and dose, but they are due to of the non-constant Kompakt michsgrades in the extruder differently good "unlocked", ie they can lead to a fluctuating quality of the final product).
  • the proportion of biomaterial in the WPC substrate can vary over a wide range. Generally, the amount of biomaterial in the WPC ranges from 0.01 to 99.99 weight percent, based on the total weight of the WPC substrate comprising biomaterial and binder. Appropriately, the highest possible
  • Biomaterial share sought to make the cost of the substrate low.
  • Preferred ranges are 10 to 90 weight percent, even more preferred are proportions in the range of 35 to 85 weight percent.
  • the type and size as well as the distribution of the biomaterials in the WPC substrate can influence the strength and elasticity of the WPC substrate.
  • the biomass used may be powdered, irregularly broken, fibrous or platelet-shaped. Preferably, it is fibrous and / or powdery.
  • the expert can sort, structure, size and
  • the biomaterial, preferably fiber and / or powder material, of the WPC substrate is held together by a matrix of binder.
  • a matrix of binder In principle, all of the processing by means of extrusion and injection molding techniques are suitable as matrix materials
  • Thermoplastic plastics are preferably used as binders.
  • the binders which can be used with particular success include, among others, polymethyl (meth) acrylates (PMMA), polycarbonates (PC), polyesters,
  • thermoplastics are used as binders for the WPC matrix either alone or in a mixture of two or more grades.
  • binders Based on PMMA, PC and especially on the basis of polyolefins (PE) and (PP), polyvinyl chloride (PVC), and polystyrene (PS) proven.
  • PMMA polymethyl (meth) acrylate
  • the parenthetical component (meth) of a polymer stands for the use of the methacrylate and / or acrylate.
  • binders those which have a relatively low melting range are also particularly preferred, so that the thermal damage to the biomass during the production process can be avoided as far as possible.
  • the WPC substrate can optionally have all additives known in plastics processing in amounts of from 0 up to 300 parts by weight, based on 100 parts by weight of biomass + binder. Preference is given to amounts in the range from 1 to 150 parts by weight, more suitably from 2 to 50 parts by weight.
  • additives - depending on the application - all additives known in the plastics industry are needed, such as UV stabilizers, antioxidants, lubricants, impact modifiers, heat stabilizers and the like.
  • a special case is the so-called "coupling agents", which improve the biomass
  • plastic matrix to cause adhesion.
  • plastic matrix usually consist of a polar group and a long, non-polar chain moiety (e.g., maleic anhydride grafted onto PP).
  • WPC materials which are particularly preferred according to the invention consist of a cellulose-containing material, in particular wood, and a PMMA
  • the shape or external shape of the WPC substrate as well as its appearance can be easily adapted to all requirements of the desired field of application.
  • the WPC substrate is flat. Preferably, it is plate-shaped.
  • the sheet WPC substrates can be massive.
  • the WPC substrate may preferably also be hollow. In the latter case one speaks of a so-called hollow chamber plate.
  • Hollow chamber panels basically consist of two or more belt plates with intermediate vertical and / or diagonal webs. This structure gives the panels a high rigidity with low weight and good heat insulating properties. Because of these properties find hollow panels, preferably made of the polymers polymethylmethacrylate, polycarbonate or
  • Polyvinyl chloride commonly used in the commercial sector, e.g. For example
  • Hollow panels are made by extrusion by means of a cross section
  • Middle layers (outer and middle straps) and the webs generated.
  • Most common embodiment are the web double plate and the web triple plate, in which the webs at regular intervals perpendicular to each other perpendicular to the plane of the plate, so that in cross section creates the image of contiguous rectangular chambers.
  • Hollow plate geometries usable as WPC substrates So can plates with two, three or four belts with vertical webs or oblique webs or
  • the thickness of the straps is generally not critical. However, the thickness should be sufficiently large, on the one hand to ensure a sufficient overall stability of the hollow chamber plate, and on the other hand, a flatness of the entire plate can be achieved. If the thickness of the straps is too low, variations in the thickness may occur Production process of the hollow chamber plate result, especially in the areas of the webs, which should be avoided if possible.
  • Hollow chamber plates with vertical webs for the inventive use as a WPC substrate sufficient and particularly preferred. Furthermore, the use of a hollow chamber plate, which is in the form of a
  • the wood-plastic combination according to the invention has as an essential constituent so-called particulate and / or fibrous, interwoven material. Under particulate or particulate or
  • the particles associated with the WPC substrate may have any shape. They can be regular or irregular. Preferably, the particles are regularly shaped in the invention, particularly expediently, the particles are spherically shaped.
  • the term spherical in the context of the present invention means that the particles preferably have a spherical shape, it being obvious to the person skilled in the art that particles of a different shape may also be present due to the production methods, or that the shape of the particles may deviate from the ideal spherical shape , The size of the particles can vary over a wide range.
  • the particles can have a narrow size distribution, but they can also be more heterogeneous, ie have a relatively broad or also "wide" size distribution
  • Preferred for the invention are narrow size distributions, ie particles with as uniform a distribution as possible in size and homogeneity Particle.
  • porosity of particles in the context of the invention means a measure of the density of a substance or mixture of substances with cavities. It is the relative density in comparison to the massive substance.
  • the porosity is given as a dimensionless number and is composed of the sum of the voids of the particulate material, which communicate with each other and with the environment (open porosity) and not together
  • the porosity of the for the purpose of Invention with very good success usable porous particulate material is preferably in the range of 0.2 to 0.7, more preferably in the range of 0.25 to 0.65 and even more preferably between 0.3 and 0.6.
  • particles include particles of inorganic material as well as particles whose material has organic origin. Mixtures of particles of inorganic and organic material are possible as well as mixed particles on an inorganic and organic basis.
  • particles of inorganic material for example, those based on silica are useful.
  • Particles which can be used in this way include, inter alia, sand, quartz sand, ground recycled glass and the like.
  • Particles of organic origin preferably comprise molding compound particles based on thermoplastic molding material. These include, but are not limited to, PMMA molding compound particles or WPC molding compound particles. Under molding compound is in this
  • thermoplastic processable i. understood by continuous casting and / or injection molding on the thermoplastic state moldable mass.
  • molding compound particles and ways for their preparation are known in the art.
  • a frequently used method for producing plastics in particle form is, for example, suspension or bead polymerization.
  • emulsion polymerization the monomers to be polymerized (for example, MMA or styrene) and a crosslinker (for example, divinylbenzene) are added together with small amounts of a radical initiator (eg, azobisisobutyronitrile) in a liquid with which they do not mix.
  • a radical initiator eg, azobisisobutyronitrile
  • fibrous, interwoven materials in the context of the present invention are glass wool, rock wool or other weather-resistant, fibrous, interwoven materials of artificial or natural origin.
  • the particulate and / or fibrous, interwoven material can now be combined with the WPC substrate in various ways within the scope of the invention. In any case, care should be taken that sound absorption is achieved by combining the particulate and / or fibrous interwoven material with the WPC substrate.
  • a preferred embodiment of the wood-plastic combination according to the invention is characterized in that the particulate material is applied in the form of a layer on a surface of the WPC substrate.
  • the particulate material in this case serves as a sound absorption material, and it is particularly expedient if the
  • Particle material is formed porous. The sound is destroyed the better, the more porous the material and the larger the surface of the material.
  • this effect can be assisted if the layer of the particulate material itself is structured to increase the surface area.
  • the layer itself is wave-shaped, comprises ribs and / or nubs, is present in the form of egg-box structures and the like.
  • the layer of particulate and / or fibrous, interwoven material as a filling inside a hollow chamber plate, as WPC substrate acts is arranged.
  • the filling may preferably be present as a bed in the hollow interior of a plate. The fill can fill the inner cavity completely or only partially. Already with a partial filling of the
  • Inner cavity of the chambers of a hollow plates can be a noticeable
  • the wood-plastic combination of the invention is characterized in that the WPC substrate is a hollow chamber plate, wherein the hollow chamber plate has at least two straps, wherein a layer of porous material outwardly limiting belt is perforated.
  • the outer belt has holes, the access of the sound waves to the present as a filling in the interior of the hollow chamber plate particle layer or layer of fibrous, interwoven material allows and the absorption and destruction of the sound is significantly promoted.
  • a particularly expedient and effective embodiment of a wood-plastic combination is achieved according to the invention by providing both the side of the WPC substrate facing a potential sound source with a layer of particles and / or fibrous, interwoven and at the same time as WPC substrate.
  • Substrate used a hollow chamber plate whose inner chambers with a
  • filling of the invention are filled, wherein the facing to the sound source belt of the hollow chamber plate has perforations, which can enter the sound in the chambers provided with the filling, but which are also designed so that a "leakage" of the filling in the case of a particle bed as filling excluded This can preferably take place in that the openings are designed to taper towards the interior of the plate - that is to say conically - and / or that the filling is not fixed loosely but by means of a suitable adhesive in the interior of the chambers.
  • the materials according to the invention can be equipped as described above accordingly. However, there are also areas of application in which it is mainly about sound insulation or the propagation of sound to one direction must be prevented as possible.
  • the sound-reflecting properties of WPC materials can also be exploited in these fields of application.
  • sound swallowing inventive filling and sound-reflecting surface of WPC materials or by partially according to the invention sound swallowing configured surface and partially sound reflecting surface left to materials of the invention can be adapted to the corresponding requirements profile of the planned application.
  • the invention also provides a process for producing wood-plastic combinations comprising a WPC substrate (wood plastic composites substrate) in conjunction with a layer of particulate material, in which process a) a substrate made of a wood-plastic combination (WPC substrate) forms; and b) providing the shaped substrate with particulate and / or fibrous interwoven material.
  • WPC substrate wood plastic composites substrate
  • WPC substrate wood-plastic combination
  • WPC substrates of any shape can be produced. So you can in injection molding and difficult geometries with
  • process variants which are characterized in that one forms a massive plate in step a).
  • Extrusion is a continuous process for the production of profiles (hollow chamber or solid profiles) or granules. Basically, a distinction is made between direct extrusion (single-stage process, in which the mixing of the components and
  • the profile production takes place in one process step in the extruder) and the extrusion of premixes (in this case, the granules are produced in a first step, which is then extruded into the profile in another extruder).
  • the extruder there are basically 3 types that are used for WPC extrusion, namely conical Twin screw extruder, the parallel twin screw extruder and the
  • the conical twin-screw extruder is the preferred machine for WPC extrusion.
  • the relatively short design guarantees a short residence time of the melt in the extruder and thus reduces the thermal load on the wood chips.
  • the individual process steps may include pre-drying the wood fibers, compressing and plasticizing in the extruder, venting and degassing (either atmospheric or vacuum), further plasticizing and mixing, forming in the tool, calibrating, cooling, cutting to length and surface treatments such as brushing or foiling.
  • thermoplastic particles are applied to an outwardly facing surface of the plate and the particles applied are thermally fixed on the surface.
  • Another preferred method variant according to the invention comprises that in the case where a WPC substrate in the form of a hollow chamber plate in step a) is formed, in step b) a cavity or the entire cavity of the hollow chamber plate with a filling of particulate and / or fibrous Fills interwoven material and perforates the strap that limits the filling to the outside.
  • Yet another particularly expedient variant comprises the combination of the two methods described above, namely the coating of the outside of the WPC substrate, and the filling according to the invention of the interiors of the hollow chambers of the WPC substrate.
  • Annealing occurs over the at least partially flowable state to a sufficiently strong compound formation (based on physical
  • Yet another expedient variant comprises sprinkling particles onto the WPC substrate and fixing the particles using microwave radiation.
  • the bond between particles and WPC substrate can also be achieved by heat in conjunction with pressure.
  • the compound or combination between particles and WPC substrate may also be by coextrusion of a solid sheet or web plate / sheet board
  • voids in the interior of the WPC substrate are brought into contact with particulate material. This is done suitably by introducing a particle bed in cavities of the substrate.
  • a particular variant of the process according to the invention is characterized in this context by using as particulate material
  • the invention also includes the use of the described wood-plastic combinations and the use of wood-plastic combinations obtainable by the process according to the invention. This opens up universal application possibilities in all areas of noise protection. Due to the universal formability of the material, the application has virtually no limits. Added to this is the weather resistance of the WPC material.
  • Particular variants of use relate to the use as acoustic panels, wall, ceiling or facade cladding, facing shell in front of concrete retaining walls or tunnel walls, noise barrier wall element or sound-insulating machine paneling.
  • Thickness of the WPC panel 25 mm
  • composition of the feeds for the extrusion was as follows:
  • Wood fibers 70% by weight
  • Adhesion promoter 10% by weight
  • Lubricant LICOWAX E 2.0% by weight
  • PMMA PLEXIGLAS® 7N 18% by weight
  • Example 3 In addition, the production of a sintered layer was carried out as follows:
  • the sintered layer thus obtained was stuck in Example 3 on the WPC material.
  • Comparative Example VB2 Polypropylene WPC panel (out of
  • Example B1 PMMA WPC panel prepared as above

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

L'invention concerne une combinaison de bois-plastique comportant un substrat WPC (wood plastics composite - composite bois plastique) en liaison avec une couche et/ou une charge en matériau particulaire et/ou fibreux, entrelacé. Les particules de préférence poreuses sont appliquées de préférence comme couche extérieure sur le substrat WPC qui a de préférence la forme d'une plaque et sont fixées sur la surface ou dans le cas de substrats sous la forme de plaques à chambre creuse, la charge selon l'invention peut être contenue en vrac ou fixée dans la chambre creuse de la plaque. Au moins une ceinture extérieure de la plaque à chambre creuse qui sépare la charge de l'extérieur est en plus de préférence perforée. Des substrats WPC ainsi améliorés sont avantageusement utilisés comme composants insonorisants et comme revêtements dans la construction.
PCT/EP2012/053174 2011-02-25 2012-02-24 Combinaisons de bois-plastique, procédé de fabrication et utilisation WO2012113913A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011004717A DE102011004717A1 (de) 2011-02-25 2011-02-25 Holz-Kunststoff-Kombinationen, Verfahren zur Herstellung sowie Verwendung
DE102011004717.4 2011-02-25

Publications (1)

Publication Number Publication Date
WO2012113913A1 true WO2012113913A1 (fr) 2012-08-30

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DE (1) DE102011004717A1 (fr)
WO (1) WO2012113913A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US10179345B2 (en) 2013-03-07 2019-01-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for producing an at least two-layered board, and an at least two-layered board

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EP3124192B1 (fr) 2015-07-27 2018-08-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede de fabrication d'un granule pouvant etre moule par injection ou extrude
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EP1847385A1 (fr) * 2006-04-20 2007-10-24 Kronotec Ag Panneau de construction et procédé destiné à la fabrication d'un panneau de construction
EP2163708A2 (fr) * 2008-09-11 2010-03-17 Rehau Ag + Co Profil doté d'un corps profilé fabriqué à partir d'un matériau composite de plastique et de bois en forme de faisceau, par exemple dans le sens de l'extrusion
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CN108422729A (zh) * 2017-09-22 2018-08-21 东北林业大学 一种宽频带吸声结构木质复合材料板

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