WO2007088245A1 - Procédé de revêtement d'une planche de bois et planche de bois - Google Patents

Procédé de revêtement d'une planche de bois et planche de bois Download PDF

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Publication number
WO2007088245A1
WO2007088245A1 PCT/FI2007/050046 FI2007050046W WO2007088245A1 WO 2007088245 A1 WO2007088245 A1 WO 2007088245A1 FI 2007050046 W FI2007050046 W FI 2007050046W WO 2007088245 A1 WO2007088245 A1 WO 2007088245A1
Authority
WO
WIPO (PCT)
Prior art keywords
acrylic resin
wood
resin
wood board
modified acrylic
Prior art date
Application number
PCT/FI2007/050046
Other languages
English (en)
Inventor
Jouko Hannukainen
Gatja Tiusanen
Original Assignee
Upm-Kymmene Wood Oy
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 Upm-Kymmene Wood Oy filed Critical Upm-Kymmene Wood Oy
Publication of WO2007088245A1 publication Critical patent/WO2007088245A1/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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B27N7/005—Coating boards, e.g. with a finishing or decorating layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
    • B05D7/08—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood using synthetic lacquers or varnishes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B05D3/104—Pretreatment of other substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified

Definitions

  • This invention relates to a method for coating wood boards, in which method the surface of the wood board is coated with curable resin, and the resin is cured and simultaneously fixed to the wood board using heat and pressure.
  • the invention also applies to wood board coated with cured resin.
  • Wood used in the form of different wood products, is a beneficial and versatile material for many purposes, but it also has unfavourable properties. OH-hydroxy groups, methoxy groups, acid ester groups and other compounds contained in cellulose fibres are hydrophilic, binding abundant water, so they cause many kinds of damage to wood products. Because wood needs water as it grows, it contains vascular tissue along which water travels easily, going on to make hydrogen bonds with the polar groups in cell walls. This type of water bonding has certain ill effects in terms of the use of wood for human purposes. Changes in volume in the wood cells are disadvantageous in many uses. Absorbed water causes the wood to swell not only dimensionally but throughout the material, causing it to take an uneven shape.
  • Wood materials are generally glued and coated with thermoset plastic.
  • thermoset plastic For example the production of plywood consists mainly of the cross-wise adhesion of veneers using a liquid resin adhesive. Weather-proof exterior sizing can be carried out with phenol-formaldehyde resol adhesive.
  • This resin adhesive contains alkaline catalysts such as sodium hydroxide (NaOH), which are powerfully hygroscopic, i.e. absorbent to water. They increase the wood's absorbent effect. Coatings are used to stop water from being absorbed and to increase the material's durability. For instance in the case of concrete casting, a coating helps to separate the wood board from the concrete surface.
  • the most common coating material is paper impregnated with phenol- formaldehyde resin, hardened into a glossy film by hot moulding. Although this coating has many advantageous properties, it is not completely waterproof. When water is absorbed through the film, it causes uneven swelling of the underlying wood material, which is visible as an adverse rippling effect on the surface of the product. Uneven swelling also causes tensions and cracking in the coating, which in turn increases the absorbency of the wood tissue. When this kind of material is used in a concrete casting mould, the uneven swelling of the surface is reflected in the concrete cast's surface, causing aesthetic problems and additional work.
  • Natural wood material consists of grain fibres and clusters that contain intermittent crystal-like areas in which well-ordered fibres have bonded together with strong hydrogen bonds. These ordered areas alternate with amorphous areas in which the fibre chains are non-ordered. These areas have sufficiently large gaps to allow water molecules to enter easily and be absorbed due to the wood's hygroscopic groups. The water forms hydrogen bonds with the hydroxy groups in the cellulose, pushing weakly ordered fibre chains away. This causes the gaps to widen and allows more water to enter. This causes the swelling of the wood.
  • the surface of wood materials must be made impermeable with a coating such as a film pressed onto the wood's surface (e.g. phenolic films and other resin-impregnated papers).
  • the coating is permeable enough not to stop the abovementioned rippling effect from taking place on the wood surface, being detrimental in many uses.
  • the aim of this invention is to present a method for treating the surface of wood materials and/or the inner components of wood materials such that the rippling effect is reduced or removed, and the swelling caused in wood by water is reduced.
  • the invention is characterised in that the surface of the wood board is treated before it is coated with curable resin, with a substance that contains a polyalkene glycol or modified acrylic resin.
  • the wood board according to the invention is characterised in that the surface of the wood that touches the cured resin consists of a polyalkene glycol or modified acrylic resin.
  • the surface of the wood board is treated with a substance containing a polyalkene glycol.
  • Alkenes include ethene, propene, butene, pentene, hexene, heptene, octene, nonene and decene.
  • the most favourable polyalkene glycol is polyethylene glycol (PEG).
  • PPG Polypropylene glycol
  • Mixtures of polyalkene glycols can also be used.
  • the selected polyalkene glycol is polyethylene glycol
  • its molecular weight should be at least 400 (PEG 400), favourably at least 1 ,000 (PEG 1000) and most favourably at least 1 ,500 (PEG 1500).
  • PEG 400 the molecular weight of the polyethylene glycol
  • PEG 1000 the molecular weight of the polyethylene glycol
  • PEG 1500 the molecular weight of the polyethylene glycol
  • the melting point rises, which means that polyethylene glycols with a molecular weight equal to or greater than 1 ,000 are solid at room temperature. Therefore the treatment agent must be melted by heating or it must be made into an aqueous solution.
  • the aqueous solution should be made such that the polyalkene glycol accounts for 35-75% by weight usually, or favourably 40-70% by weight. If using polyethylene glycol with a molecular weight of 1 ,000 or above, the water and polyethylene glycol must be heated to 50-60 0 C to form the solution. When the aqueous solution has been prepared, it is applied to the wood board's surface using a roller, or by spraying or pouring. A suitable amount for application is 60-100 g/m 2 , favourably 70-90 g/m 2 . Simple melted polyalkene glycol can be applied directly onto the wood board's surface.
  • the wood board can be for instance a plywood board consisting of several interconnected layers of wood veneer. A particularly suitable material for use is birch plywood, as the treatment substance is absorbed less efficiently into softwood plywood.
  • the treatment agent is left to dry and/or dried before the next stage.
  • the curable resin can be in film form, for instance impregnated into paper, or in liquid form. In the latter case it is spread onto the wood board's surface and dried.
  • the curable resin can be a urea, melamine or phenolic resin. Most favourably, the curable resin should be in film form.
  • the curable resin is pressed onto the wood board's surface at a temperature of 100-200 0 C, applying a pressure of 1.0-2.5 N/mm 2 .
  • the treatment agent containing polyalkene glycol penetrates deeper into the wood material, which forms a polyalkene-glycol-treated layer at the wood material's surface.
  • the surface of the wood panel is treated with a substance containing a modified acrylic resin.
  • the modified acrylic resin can be for instance carboxylated acrylic resin, hydroxylated acrylic resin, aminated acrylic resin, fatty- acid-modified acrylic resin or wax-modified acrylic resin. Suitable commercial brands include Hydrolast (AST Products, Inc., USA).
  • the modified acrylic resin is applied to the wood board's surface using a roller, or by spraying or curtain coating.
  • a suitable amount for application is 30-400 g/m2, favourably 40-150 g/m2. 35 - 45 g/m 2 is sufficient to slow down the absorption of water, but 95-105 g/m 2 is needed for complete protection of the wood board.
  • the wood board can be for instance a plywood board consisting of several interconnected layers of wood veneer. A particularly suitable material for use is birch plywood.
  • the treatment agent When the treatment agent has been spread onto the wood board, it is left to dry and/or dried before the next stage.
  • the curable resin can be in film form, for instance impregnated into paper, or in liquid form. In the latter case it is spread onto the wood board's surface and dried.
  • the curable resin can be a urea, melamine or phenolic resin. Most favourably, the curable resin should be in film form.
  • Suitable films include phenolic film with a basis weight of 120-220 g/m 2 . All resin coatings with a weight of 60-400 g/m 2 are suitable, as are thin plastic coatings. By thin plastic coatings we mean thermoset plastic and duroplastic with a thickness of less than 1 mm.
  • the curable resin is pressed onto the wood board's surface at a temperature of 100-200 0 C applying a pressure of 1.0-2.5 N/mm 2 .
  • Example 2 Two different PEG treatments were given to samples. In each treatment, 80 g/m 2 of PEG 400 was absorbed into the board's surface. The first sample piece was treated with 80 g/m 2 of 100% PEG 400 and the second sample was treated with 130 g/m 2 of 60% PEG 400. During spreading, no significant differences were observed in the absorption of the agent. After spreading, the samples were dried for 18 h. After drying, no significant differences were observed between the samples.
  • Three samples were treated with wax-modified acrylic resin such that 59 g/m 2 , 86 g/m 2 and 153 g/m 2 of modified acrylic resin were spread with a roller.
  • the modified acrylic resin was used undiluted.
  • An untreated birch plywood board was used as a control sample.
  • the treated samples were left to dry; the suitable drying time ranges from 1 to 20 minutes depending on the amount applied.
  • a phenolic film with a basis weight of 120 g/m 2 was pressed onto the surfaces by hot moulding. A similar phenolic film was pressed onto the control sample's surface.
  • the prepared boards were tested by making scratches with a depth of 150 and 225 ⁇ m. The scratches went through the coating. The scratches were covered with water-soaked paper and left in these moist conditions for one hour. After this the wet papers were removed and the results were evaluated.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

Cette invention concerne un procédé de revêtement d'une planche de bois, dans lequel la surface de la planche de bois est d'abord traitée avec une substance contenant un polyalkène glycol ou une résine acrylique modifiée. La surface de la planche de bois est ensuite recouverte d'une résine durcissable, et la résine est durcie et simultanément fixée sur la planche de bois à l'aide de la chaleur et de la pression. Cette invention concerne également la planche de bois revêtue.
PCT/FI2007/050046 2006-02-03 2007-01-29 Procédé de revêtement d'une planche de bois et planche de bois WO2007088245A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20065083A FI20065083A0 (fi) 2006-02-03 2006-02-03 Menetelmä puulevyn pinnoittamiseksi ja puulevy
FI20065083 2006-02-03

Publications (1)

Publication Number Publication Date
WO2007088245A1 true WO2007088245A1 (fr) 2007-08-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2007/050046 WO2007088245A1 (fr) 2006-02-03 2007-01-29 Procédé de revêtement d'une planche de bois et planche de bois

Country Status (2)

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FI (1) FI20065083A0 (fr)
WO (1) WO2007088245A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009156594A1 (fr) * 2008-06-27 2009-12-30 Dynea Oy Procédé de traitement d’un panneau de bois
WO2011011804A1 (fr) * 2009-07-27 2011-02-03 Herbert Mikowitsch Procédé de traitement de surface d'une plaque de bois imprégné densifié
EP2957351A1 (fr) * 2014-06-18 2015-12-23 UPM-Kymmene Wood Oy Procédé de production de contreplaqué ayant un revêtement
WO2017060447A1 (fr) * 2015-10-09 2017-04-13 Knauf Insulation Sprl Panneaux de particules de bois
US11511318B2 (en) 2017-06-13 2022-11-29 Hymmen GmbH Maschinen- und Anlagenbau Method and apparatus for producing a decorative workpiece and workpiece
US11559824B2 (en) 2019-05-03 2023-01-24 Hymmen Gmbh Maschinen-Und Anlagenbau Method for producing a structure on a surface

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3493417A (en) * 1965-06-08 1970-02-03 Stockholms Superfosfat Fab Ab Composition for treatment of wood products comprising a polyol compound,a polymerizable amine formaldehyde resin and a curing catalyst
US3661633A (en) * 1963-12-11 1972-05-09 Rolf Erhard Moren Process and composition for impregnating wood and wood products
JPS54107983A (en) * 1978-02-13 1979-08-24 Osaka Soda Co Ltd Method of overlaying decorative sheet containing natural wood layer
JPS5547166A (en) * 1978-09-28 1980-04-03 Matsushita Electric Works Ltd Coating method of wooden veneer bonded decorative plate
JPS60199606A (ja) * 1984-03-23 1985-10-09 松下電工株式会社 染色単板の製法
EP0439314A2 (fr) * 1990-01-25 1991-07-31 Rohm And Haas Company Procédé de fabrication de panneaux à base de bois et d'une composition liante utilisée pour le traitement du matelas avant pressage
EP1136636A1 (fr) * 2000-03-24 2001-09-26 Kronotec Ag Panneaux de bois, en particulier un panneau de coffrage
WO2006117160A1 (fr) * 2005-05-02 2006-11-09 Basf Aktiengesellschaft Procede d'impermeabilisation de materiaux lignocellulosiques

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3661633A (en) * 1963-12-11 1972-05-09 Rolf Erhard Moren Process and composition for impregnating wood and wood products
US3493417A (en) * 1965-06-08 1970-02-03 Stockholms Superfosfat Fab Ab Composition for treatment of wood products comprising a polyol compound,a polymerizable amine formaldehyde resin and a curing catalyst
JPS54107983A (en) * 1978-02-13 1979-08-24 Osaka Soda Co Ltd Method of overlaying decorative sheet containing natural wood layer
JPS5547166A (en) * 1978-09-28 1980-04-03 Matsushita Electric Works Ltd Coating method of wooden veneer bonded decorative plate
JPS60199606A (ja) * 1984-03-23 1985-10-09 松下電工株式会社 染色単板の製法
EP0439314A2 (fr) * 1990-01-25 1991-07-31 Rohm And Haas Company Procédé de fabrication de panneaux à base de bois et d'une composition liante utilisée pour le traitement du matelas avant pressage
EP1136636A1 (fr) * 2000-03-24 2001-09-26 Kronotec Ag Panneaux de bois, en particulier un panneau de coffrage
WO2006117160A1 (fr) * 2005-05-02 2006-11-09 Basf Aktiengesellschaft Procede d'impermeabilisation de materiaux lignocellulosiques

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10335977B2 (en) 2008-06-27 2019-07-02 Surfactor Germany Gmbh Method for treating a wood board
CN105150323A (zh) * 2008-06-27 2015-12-16 索菲克特德国公司 处理木板的方法
WO2009156594A1 (fr) * 2008-06-27 2009-12-30 Dynea Oy Procédé de traitement d’un panneau de bois
EA024957B1 (ru) * 2008-06-27 2016-11-30 Серфактор Джермани Гмбх Способ обработки древесной плиты
WO2011011804A1 (fr) * 2009-07-27 2011-02-03 Herbert Mikowitsch Procédé de traitement de surface d'une plaque de bois imprégné densifié
EP2957351A1 (fr) * 2014-06-18 2015-12-23 UPM-Kymmene Wood Oy Procédé de production de contreplaqué ayant un revêtement
WO2017060447A1 (fr) * 2015-10-09 2017-04-13 Knauf Insulation Sprl Panneaux de particules de bois
US10864653B2 (en) 2015-10-09 2020-12-15 Knauf Insulation Sprl Wood particle boards
US11511318B2 (en) 2017-06-13 2022-11-29 Hymmen GmbH Maschinen- und Anlagenbau Method and apparatus for producing a decorative workpiece and workpiece
US11717851B2 (en) 2017-06-13 2023-08-08 Hymmen GmbH Maschinen—und Anlagenbau Method and apparatus for producing a decorative workpiece and workpiece
US11717850B2 (en) 2017-06-13 2023-08-08 Hymmen Gmbh Maschinen-Und Anlagenbau Method and apparatus for producing a decorative workpiece and workpiece
US11883843B2 (en) 2017-06-13 2024-01-30 Hymmen Gmbh Maschinen-Und Anlagenbau Method for producing a structured surface
US11559824B2 (en) 2019-05-03 2023-01-24 Hymmen Gmbh Maschinen-Und Anlagenbau Method for producing a structure on a surface

Also Published As

Publication number Publication date
FI20065083A0 (fi) 2006-02-03

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