SE529747C2 - Binder-free process for producing lignocellulosic laminate by hot pressing, and thereby producing laminate - Google Patents

Binder-free process for producing lignocellulosic laminate by hot pressing, and thereby producing laminate

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Publication number
SE529747C2
SE529747C2 SE0600812A SE0600812A SE529747C2 SE 529747 C2 SE529747 C2 SE 529747C2 SE 0600812 A SE0600812 A SE 0600812A SE 0600812 A SE0600812 A SE 0600812A SE 529747 C2 SE529747 C2 SE 529747C2
Authority
SE
Sweden
Prior art keywords
laminate
elements
disc
laminate according
hot pressing
Prior art date
Application number
SE0600812A
Other languages
Swedish (sv)
Other versions
SE0600812L (en
Inventor
Carmen Cristescu
Dennis Johansson
Yu Chen
Original Assignee
Carmen Cristescu
Dennis Johansson
Yu Chen
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 Carmen Cristescu, Dennis Johansson, Yu Chen filed Critical Carmen Cristescu
Priority to SE0600812A priority Critical patent/SE529747C2/en
Priority to EP07747996A priority patent/EP2013015A4/en
Priority to PCT/SE2007/000330 priority patent/WO2007117195A1/en
Publication of SE0600812L publication Critical patent/SE0600812L/en
Publication of SE529747C2 publication Critical patent/SE529747C2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/12—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/30—Organic material
    • B23K2103/32—Material from living organisms, e.g. skins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B2037/0092—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding in which absence of adhesives is explicitly presented as an advantage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/065—Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/067—Wood fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/02—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/04—Time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/12—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B32B38/1866—Handling of layers or the laminate conforming the layers or laminate to a convex or concave profile

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The invention relates to a method regarding the manufacturing of a laminate that includes at least two sheet formed elements of lignocellulosic material, for example wood material. The sheet elements (11, 12; 21, 22) are mutually joined by heat treatment and compression without addition of bonding agents and without friction generating relative movement of the sheet elements. The invention also includes the laminate.

Description

lO 15 20 25 30 529 747 Laminatets form kan varieras efter önskemål, laminatet kan exempelvis vara plant, enkelkrökt eller dubbelkrökt till sin form. The shape of the laminate can be varied as desired, the laminate can be, for example, flat, single-curved or double-curved in shape.

Laminatprodukten är estetiskt tilltalande och erhåller en tilltalande kulör.The laminate product is aesthetically pleasing and acquires an attractive color.

Ett utföringsexempel av uppfinningen kommer i det följande att närmare beskrivas med hänvisning till bifogad ritning, på vilken flg_1 i en perspektivvy schematiskt visar ett uppfinningsenligt laminat, figl i en perspektivvy schematiskt ViSS-f ett laminat i en alternativ utföringsform, figå i en sidovy illustrerar tillverkning av ett plant laminat, och l i en sidovy illustrerar tillverkning av ett krökt laminat.An embodiment of the invention will be described in more detail below with reference to the accompanying drawing, in which fl g_1 in a perspective view schematically shows an inventive laminate, fi gl in a perspective view schematically ViSS-f a laminate in an alternative embodiment, fi go in a side view illustrating manufacture of a flat laminate, and in a side view illustrates the manufacture of a curved laminate.

I fig 1 visas ett tvåskiktslaminat 10 som innefattar ett skivelement ll och ett skivelement 12, vilka skivelement 11,12 innefattar fibrer av lignocellulosamaterial.Figure 1 shows a two-layer laminate 10 comprising a board element 11 and a board element 12, which board elements 11, 12 comprise pieces of lignocellulosic material.

Skivelementen 11,12 kan exempelvis vara av ett trämaterial där den dominerande fiberriktningen illustrerats med streckade linjer 13 respektive 14. Hos det i fig 1 visade laminatet 10 uppvisar de båda skivelementen/skikten 11 och 12 en väsentligen sammanfallande fiberriktning.The board elements 11,12 can for instance be of a wooden material where the dominant fi direction is illustrated with dashed lines 13 and 14, respectively. In the laminate 10 shown in fi g 1, the two board elements / layers 11 and 12 have a substantially coincident fi direction.

I fig 2 visas ett tvåskiktslaminat 20 som innefattar ett skivelement 21 och ett skivelement 22, vilka skivelement 21,22 innefattar fibrer av lignocellulosamaterial.Figure 2 shows a two-layer laminate 20 comprising a board element 21 and a board element 22, which board elements 21, 22 comprise branches of lignocellulosic material.

Skivelementen 21,22 kan exempelvis vara av ett trämaterial där den dominerande fiberriktningen illustrerats med streckade linjer 23 respektive 24. Hos det i fig 2 visade laminatet 20 uppvisar de båda skivelementen/skikten 21 och 22 en väsentligen gentemot varandra vinkelrät fiberriktning.The board elements 21, 22 can for instance be of a wooden material where the dominant direction is illustrated by dashed lines 23 and 24, respectively. In the laminate 20 shown in Figure 2, the two board elements / layers 21 and 22 have a substantially perpendicular direction to each other.

Det skall dock inses att det uppfinningsenliga larninatet kan uppvisa många andra fiberriktningskombinationer mellan ingående skivelement utöver vad som ovan exemplifierats. Det har dock konstaterats att laminat där ingående skivelement har väsentligen med varandra sammanfallande fiberriktning är särskilt fördelaktiga ur hållfasthetssynpunkt.It should be understood, however, that the inventive laminate can exhibit many other directional combinations between included disc elements in addition to what has been exemplified above. However, it has been found that laminates where the included board elements have a substantially coincident fi direction are particularly advantageous from the point of view of strength.

Det skall inses att det uppfinnjngsenliga laminatet naturligtvis kan vara uppbyggt av ett valfritt antal skivelement av valfria tjocklekar. Träslagsvariationer mellan olika skivelement i ett laminat är naturligtvis möjliga inom ramen för föreliggande uppfinning.It will be appreciated that the collapsible laminate may, of course, be composed of any number of sheet elements of any thickness. Wood type variations between different board elements in a laminate are of course possible within the scope of the present invention.

Många kombinationer är således möjliga.Many combinations are thus possible.

Gemensamt för olika utföringsformer av de uppfinningsenliga laminaten är att Skivelementen är inbördes förenade utan förekomst av bindemedelstillsats (tillsatsmaterial) och utan förekomst av exempelvis förberedande kemisk behandling. 10 15 20 25 30 529 747 l fig 3 illustreras ett förfarande vid tillverkning av ett plant larninat 10 medelst en pressanordning 50, varvid skivelementen 11,12 placeras mellan två pressplattor 51,52.Common to different embodiments of the inventive laminates is that the board elements are interconnected without the presence of binder additive (additive material) and without the presence of, for example, preparatory chemical treatment. Fig. 3 illustrates a method of manufacturing a flat larnate 10 by means of a pressing device 50, wherein the disc elements 11,12 are placed between two pressing plates 51,52.

Pressplattorna 51,52 är uppvärmda till önskad temperatur med hjälp av exempelvis värmeslingor 53,54 eller liknande arrangemang. En kraft F anbringas så att skivelementen 11,12 sammanpressas mellan de uppvärmda pressplattorna 51,52 under en önskad tidsperiod så att önskat bindningsresultat erhålls mellan skivelementen 11,12.The press plates 51.52 are heated to the desired temperature by means of, for example, heating coils 53.54 or similar arrangements. A force F is applied so that the disc elements 11,12 are compressed between the heated press plates 51,52 for a desired period of time so that the desired bonding result is obtained between the disc elements 11,12.

Därefter avlägsnas det nu fardigställda laminatet 10 från pressanordningen 50.Thereafter, the now finished laminate 10 is removed from the press device 50.

Presskraften F är så vald att önskat tryckkraft per ytenhet erhålls vid framställning av en aktuell laminatskiva.The pressing force F is chosen so that the desired compressive force per unit area is obtained in the production of a current laminate board.

I fig 4 illustreras ett förfarande vid tillverkning av ett krökt laminat 10' medelst en pressanordning 50°, varvid plana skivelement 11212” placeras mellan två pressplattor 51252”. Pressplattorna 51”,52“ är uppvärmda till önskad temperatur med hjälp av exempelvis värmeslingor 53254” eller liknande arrangemang. En krafi F anbringas så att skivelementen 11212” sammanpressas mellan de uppvärmda pressplattoma 51252' under en önskad tidsperiod så att önskat bindningsresultat erhålls mellan skivelementen l1”,l2'.Fig. 4 illustrates a method of manufacturing a curved laminate 10 'by means of a press device 50 °, wherein flat plate elements 11212 are "placed between two press plates 51252". The press plates 51 ", 52" are heated to the desired temperature by means of, for example, heating coils 53254 "or similar arrangements. A collar fi F is applied so that the disc elements 11212 "are compressed between the heated press plates 51252 'for a desired period of time so that the desired bonding result is obtained between the disc elements l1', l2 '.

Därefter avlägsnas det nu fírdigställda larninatet 10' från pressanordningen 50”.Thereafter, the now completed larnate 10 'is removed from the press device 50'.

Presskraften F är så vald att önskat tryckkraft per ytenhet erhålls vid framställning av en aktuell laminatskiva. Således skall inses att föreliggande uppfinning även möjliggör framställning av laminat i en rad olika konfigurationen Vidare bör nämnas att samspelet mellan olika parametrar, såsom tryck, temperatur och presstid, kan varieras för erhållande av önskade egenskaper hos framställt laminat.The pressing force F is chosen so that the desired compressive force per unit area is obtained in the production of a current laminate board. Thus, it should be understood that the present invention also enables the production of laminates in a variety of configurations. Furthermore, it should be mentioned that the interaction between different parameters, such as pressure, temperature and pressing time, can be varied to obtain desired properties of manufactured laminates.

Träslag, initialfuktighet, dimensioner, önskad slutkulör och önskad hållfasthet är exempel på parameterstyrande faktorer.Wood type, initial moisture, dimensions, desired final color and desired strength are examples of parameter-controlling factors.

Vid framställning av ett laminat sker exempelvis en tjocklekskomprimering i beroende av använt presstryck och en kulörförändring i beroende av skivelementens uppvärmningstemperattir.In the production of a laminate, for example, a thickness compression takes place in dependence on the pressure applied and a color change in dependence on the heating temperature of the board elements.

Det skall inses att exempelvis uppvärmningen av skivelementen kan ske på många olika sätt utöver vad som ovan exemplifierats. Det är exempelvis möjligt att använda högfrekvensteknik eller mikrovågsteknik osv.It should be understood that, for example, the heating of the board elements can take place in many different ways in addition to what has been exemplified above. It is possible, for example, to use high-frequency technology or microwave technology, etc.

Vidare har konstaterats att skivelement med högt fuktinnehåll tenderar att ge starkare bindning mellan laminatets skivelement. 10 15 20 25 30 35 40 45 529 747 Det uppfinningsenliga laminatet har många användningsområden och såsom icke begränsande exempel kan nämnas golvskivor, väggskivor, takskivor, möbler, dörrar och andra produkter av varierande slag.Furthermore, it has been found that board elements with a high moisture content tend to provide stronger bonding between the board elements of the laminate. 10 15 20 25 30 35 40 45 529 747 The inventive laminate has many areas of use and as non-limiting examples may be mentioned floorboards, wall panels, ceiling panels, furniture, doors and other products of various kinds.

Parameterintervall och dylikt finns angivna i efterföljande patentkrav. Nedan följer några exempel på utövning av uppfinningen.Parameter ranges and the like are specified in the following claims. Below are some examples of exercising the exercise.

Exempel 1 Fem provbitar av bokfaner med dimensionen l40mmx140mmx2mm och cirka 10% fuktkvot läggs samman med parallell fiberriktning och läggs i en stängd laboratonepress.Example 1 Five test pieces of beech veneer with the dimension l40mmx140mmx2mm and approximately 10% moisture ratio are added together with a parallel rikt direction and placed in a closed laboratory press.

Efter 180 sekunders presstid i 240 grader Celsius med 5 N/mm2 presstryck, tas laminatet ut ur ugnen och avkyls till rumstemperatur.After 180 seconds of pressing time in 240 degrees Celsius with 5 N / mm2 pressing pressure, the laminate is taken out of the oven and cooled to room temperature.

Resultaten från skjuvhållfasthetstestet (utfördes på 20 provbitar) efter 8 timmar i kokande vatten visar ett medelvärde på 5,53 N/mm2.The results of the shear strength test (performed on 20 test pieces) after 8 hours in boiling water show an average value of 5.53 N / mm2.

Exempel 2 Fem provbitar av bokfaner med dimensionen l40mmx140mmx2mm och cirka 10% fuktkvot läggs samman med parallell fiberriktning och läggs i en stängd laboratonepress.Example 2 Five test pieces of beech veneer with the dimension l40mmx140mmx2mm and approximately 10% moisture ratio are added together with parallel fi direction and placed in a closed laboratory press.

Efter 80 sekunders presstid i 300 grader Celsius med 5 N/mm2 presstryck, tas laminatet ut ur ugnen och avkyls till rumstemperatur.After 80 seconds of pressing time in 300 degrees Celsius with 5 N / mm2 pressing pressure, the laminate is taken out of the oven and cooled to room temperature.

Resultaten från skj uvhållfasthetstestet (utfördes på 10 provbitar) efter 8 timmar i kokande vatten.visar ett medelvärde på 4,48 N/mm2.The results of the shear strength test (performed on 10 test pieces) after 8 hours in boiling water show an average value of 4.48 N / mm2.

Exempel 3 Fem provbitar av bokfaner med dimensionen l40mmx140mmx2mm och cirka 10% fuktkvot läggs samman med vinkelrät fiberriktning och läggs i en stängd laboratonepress.Example 3 Five test pieces of beech veneer with the dimension l40mmx140mmx2mm and approximately 10% moisture ratio are added together with a perpendicular direction and placed in a closed laboratory press.

Efter 450 sekunders presstid i 230 -240 grader Celsius med 4 N/mm2 presstryck, tas laminatet ut ur ugnen och avkyls till rumstemperatur.After 450 seconds of pressing time at 230 -240 degrees Celsius with 4 N / mm2 pressing pressure, the laminate is taken out of the oven and cooled to room temperature.

Resultaten från skj uvhålltasthetstestet (utfördes på 10 provbitar) visar ett medelvärde på 1,86 N/mm2.The results of the shear strength test (performed on 10 test pieces) show an average value of 1.86 N / mm2.

Exempel 4 Tre provbitar av ekfaner med dimensionen 100mmx40mmx2.5mm och cirka 10% fuktkvot läggs samman med parallell fiberriktning och läggs i en stängd laboratonepress.Example 4 Three test pieces of oak veneer with the dimension 100mmx40mmx2.5mm and approximately 10% moisture ratio are combined with parallel rikt direction and placed in a closed laboratory press.

Efter 150 sekunders presstid i 250 grader Celsius med 5 N/mm2 presstryck, tas laminatet ut ur ugnen och avkyls till rumstemperatur. lO 15 20 3529 747 Resultaten från skjuvhållfasthetstestet (utfördes på 10 provbitar) efter 8 timmar i kokande vatten visar ett medelvärde på 3,52 N/mm2.After 150 seconds of pressing time in 250 degrees Celsius with 5 N / mm2 pressing pressure, the laminate is taken out of the oven and cooled to room temperature. The results of the shear strength test (performed on 10 test pieces) after 8 hours in boiling water show an average value of 3.52 N / mm2.

Exempel 5 Tre delar faner: en ekfaner , en bokfaner och en ekfaner, med dimensionen v _ l40mrnxl40mmx2mm och cirka 10% fuktkvot läggs samman med parallell fiberriktning och läggs i en stängd laboratoriepress.Example 5 Three parts of veneer: an oak veneer, a beech veneer and an oak veneer, with the dimension v _ l40mrnxl40mmx2mm and about 10% moisture ratio are added together with parallel fi direction and placed in a closed laboratory press.

Efter 150 sekunders presstid i 250 grader Celsius med 3,75 N/mm2 presstryck, tas laminatet ut ur ugnen och avkyls till rumstemperatur.After 150 seconds of pressing time in 250 degrees Celsius with 3.75 N / mm2 pressing pressure, the laminate is taken out of the oven and cooled to room temperature.

Resultaten från skjuvhållfasthetstestet (utfördes på 10 provbitar) visar ett medelvärde på 2,63 N/mm2.The results of the shear strength test (performed on 10 test pieces) show an average value of 2.63 N / mm2.

Många variationer är naturligtvis möjliga inom ramen för den ovan beskrivna uppfinningsidén.Many variations are of course possible within the framework of the invention idea described above.

Uppfinningen är således inte begränsad till det visade och beskrivna utan ändringar och modifikationer är således möjliga inom ramen för efterföljande patentkrav.The invention is thus not limited to what is shown and described, but changes and modifications are thus possible within the scope of the appended claims.

Claims (15)

10 15 20 25 30 -529 747 PATENTKRAV10 15 20 25 30 -529 747 PATENT REQUIREMENTS 1. Förfarande vid tillverkning av ett larninat som innefattar åtminstone tvâ skivformiga element av lignocellulosamaterial, exempelvis trämaterial, kännetecknat av att skivelementen (11,l2;21,22) inbördes förenas medelst värmebehandling och sammanpressning utan tillsats av bindemedel och utan friktionsalstrande relativrörelse hos skivelementen.Method in the manufacture of a larnate comprising at least two disc-shaped elements of lignocellulosic material, for example wood material, characterized in that the disc elements (11, 12; 21, 22) are joined together by heat treatment and compression without addition of binder and without friction-generating relative movement of the disc element. 2. Förfarande enligt krav 1, kännetecknat av att skivelementens (1 1,l2;21,22) huvudsakliga fiberlängdriktningar (13,14;23,24) är väsentligen inbördes parallella.Method according to claim 1, characterized in that the main fi berlengning directions (13,14; 23,24) of the disc elements (1 1, 12; 21,22) are substantially mutually parallel. 3. Förfarande enligt krav 1, kännetecknat av att skivelementens (1 1,l2;21,22) huvudsakliga fiberlängdriktningar (13,14;23,24) är inbördes olikriktade.Method according to Claim 1, characterized in that the main fi longitudinal directions (13,14; 23,24) of the disc elements (1 1, 12; 21,22) are mutually unidirectional. 4. Förfarande enligt något av krav 1-3, kännetecknat av att varmpressning sker inom ett temperaturintervall på ca 20-450°C och företrädesvis inom ett temperaturintervall på ca 220-300°C.Method according to one of Claims 1 to 3, characterized in that hot pressing takes place within a temperature range of approximately 20-450 ° C and preferably within a temperature range of approximately 220-300 ° C. 5. Förfarande enligt något av krav 1-4, kännetecknat av att varmpressning sker inom ett tryckintervall på ca 0,5-30 N/mm2 (Mpa) och företrädeSviS iIIOIII Cït tryckintervall på ca 1-7 N/mm2 (Mpa).Method according to one of Claims 1 to 4, characterized in that hot pressing takes place within a pressure range of approximately 0.5-30 N / mm 2 (MPa) and preferably Swiss IIIIIII CIT pressure range of approximately 1-7 N / mm 2 (MPa). 6. Förfarande enligt något av krav 1-5, kännetecknat av att varmpressning sker under ett tidsintervall på ca 30 sekunder-20 minuter och företrädesvis inom ett tidsintervall på ca 1-10 minuter.Method according to any one of claims 1-5, characterized in that hot pressing takes place during a time interval of about 30 seconds-20 minutes and preferably within a time interval of about 1-10 minutes. 7. Förfarande enligt något av krav 1-6, kännetecknat av att man använder åtminstone ett uppvärmt pressverktyg (50;50') vid tillverkning av laminatet (10;10”;20) varvid pressverktyget uppvisar plan eller krökt form i beroende av önskad slutforrn hos laminatet.Method according to one of Claims 1 to 6, characterized in that at least one heated press tool (50; 50 ') is used in the manufacture of the laminate (10; 10 "; 20), the press tool having a flat or curved shape depending on the desired final shape. in the laminate. 8. Laminat, innefattande åtminstone två skivforrniga element av lignocellulosamaterial, exempelvis trämaterial, kännetecknat av att skivelementen (1l,12;21,22) är inbördes förenade medelst värmebehandling och sammanpressning utan tillsats av bindemedel och utan friktionsalstrande relativrörelse hos skivelementen.Laminate, comprising at least two disc-shaped elements of lignocellulosic material, for example wood material, characterized in that the disc elements (11, 12; 21, 22) are interconnected by heat treatment and compression without the addition of adhesive and without friction-generating relative movement of the disc elements. 9. Laminat enligt krav 8, kännetecknat av att skivelementens (1l,12;21,22) huvudsakliga fiberlängdriktningar (l3,14;23,24) är väsentligen inbördes parallella.Laminate according to Claim 8, characterized in that the main longitudinal directions of the board elements (11, 12; 21, 22) (13, 14; 23, 24) are substantially parallel to one another. 10. Laminat enligt krav 8, kännetecknat av att skivelementens (1 1,12;21,22) huvudsakliga ñberlängdriktningar (13,14;23,24) är inbördes olikriktade.Laminate according to Claim 8, characterized in that the main ñber longitudinal directions (13,14; 23,24) of the board elements (1, 1, 12; 21, 22) are mutually unidirectional. 11. Laminat enligt något av krav 8-10, kännetecknat av att skivelementen år kulörförändrade genom värmetillförsel. 10 529 747Laminate according to one of Claims 8 to 10, characterized in that the board elements are color-changed by heat supply. 10 529 747 12. Laminat enligt något av krav 8-1 l, kännetecknat av att det uppvisar väsentligen plan form.Laminate according to one of Claims 8 to 1, characterized in that it has a substantially planar shape. 13. Laminat enligt något av krav 8-11, kännetecknat av att det uppvisar enkelkrökt forrn.Laminate according to one of Claims 8 to 11, characterized in that it has a single-curved shape. 14. Laminat enligt något av krav 8-1 l, kännetecknat av att det uppvisar dubbelkrökt form.Laminate according to one of Claims 8 to 1, characterized in that it has a double-curved shape. 15. Laminat enligt något av krav 8-14, kännetecknat av att skivelementen är av bok, ceder, ek, furu, björk, gran, valnöt, körsbär eller alm eller en kombination av dessa träslag.Laminate according to one of Claims 8 to 14, characterized in that the board elements are made of beech, cedar, oak, pine, birch, spruce, walnut, cherry or elm or a combination of these types of wood.
SE0600812A 2006-04-10 2006-04-10 Binder-free process for producing lignocellulosic laminate by hot pressing, and thereby producing laminate SE529747C2 (en)

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SE0600812A SE529747C2 (en) 2006-04-10 2006-04-10 Binder-free process for producing lignocellulosic laminate by hot pressing, and thereby producing laminate
EP07747996A EP2013015A4 (en) 2006-04-10 2007-04-09 Method of producing a laminate comprising at least two layers of lignocellulosic material joined by heat treament and pressing
PCT/SE2007/000330 WO2007117195A1 (en) 2006-04-10 2007-04-09 Method of producing a laminate comprising at least two layers of lignocellulosic material joined by heat treament and pressing

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DE202008015878U1 (en) * 2008-12-01 2010-04-15 Homag Holzbearbeitungssysteme Ag Device for coating workpieces
CN107127838A (en) * 2017-06-16 2017-09-05 福建省林业科学研究院 A kind of novel mildew resistant cabinet thick china and its manufacture method
SE2051271A1 (en) * 2020-11-02 2022-04-26 Modvion Ab Method for producing a laminated veneer lumber board

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US3621897A (en) * 1969-03-06 1971-11-23 Luigi Vazzola Process for the improvement of natural wood, particularly for the production of compressed wooden components provided if required with ornamentation
US4007312A (en) * 1973-09-27 1977-02-08 The Regents Of The University Of California Method of bonding solid lignocellulosic material, and resulting product
FR2384618A1 (en) * 1977-03-24 1978-10-20 Bergwood Nv Curved laminated panel mfr. - using male template pressed against female one and lateral arms to bend ends
DE19620273C2 (en) * 1996-05-20 1999-06-10 Burkhardt Prof Dr Dr Suthoff Process for friction welding and joining wood
DE19852033A1 (en) * 1998-11-11 2000-05-18 Fraunhofer Ges Forschung Compound board material has a carrier of lignin with natural fiber reinforcement to be bonded to a decorative layer by heat and pressure
US7314534B2 (en) * 2003-07-23 2008-01-01 Masonite Corporation Method of making multi-ply door core, multi-ply door core, and door manufactured therewith

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EP2013015A1 (en) 2009-01-14

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