EP2091665A1 - Procede et dispositifs d'application separee d'un systeme de colle liquide a plusieurs constituants - Google Patents

Procede et dispositifs d'application separee d'un systeme de colle liquide a plusieurs constituants

Info

Publication number
EP2091665A1
EP2091665A1 EP07822426A EP07822426A EP2091665A1 EP 2091665 A1 EP2091665 A1 EP 2091665A1 EP 07822426 A EP07822426 A EP 07822426A EP 07822426 A EP07822426 A EP 07822426A EP 2091665 A1 EP2091665 A1 EP 2091665A1
Authority
EP
European Patent Office
Prior art keywords
length
chamber
outflow chamber
application
walls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07822426A
Other languages
German (de)
English (en)
Inventor
Eberhard PFÜTZE
Claus Fueger
Theodor Hunold
Sepp Neuner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to EP07822426A priority Critical patent/EP2091665A1/fr
Publication of EP2091665A1 publication Critical patent/EP2091665A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work

Definitions

  • the present invention relates to a method and apparatus for the uniform and separate application of a liquid multi-component glue system on the O ber Design of wood-based materials and their use for bonding wood-based materials. Furthermore, the present invention relates to a composite material produced by the process according to the invention.
  • a separate application of a multi-component glue system means that the individual components are not mixed or brought into contact with each other before they reach the wood-based material surface. This requires that no mixing process is required before application, so that the risk of pre-curing of a glue mixture during storage, during transport and in the application device is eliminated and further interruptions due to these factors can be avoided.
  • a separate application also means that the processing time of the components is theoretically unlimited and special requirements for the cleaning of the applicator after use omitted, also eliminates the need to discard unused glue systems.
  • the separate application method is described in various embodiments, may be mentioned here the separate surface application (EP-A 16 740, EP-A 241 891), the separate application in the form of strings (EP-A 1 425 1 14, EP-A 1 089 827, EP-A 690 1 14), the application by spraying the components (DE-A 100 35 412, CH-A 546 134, DE-A 22 13 269, GB-A 1332 880) and combinations of said variants , and a combination of a glue application with the aid of a cast film and a hardener application in Schurform (EP-A 362 742, EP-A 241 891, DE-A 37 12 347).
  • the pressing times must be adapted to the thickest applied layer of glue, so that in total longer pressing times must be accepted.
  • the waiting time i. the time between the glue application and the closing of the presses must be further adapted to the thinnest layer of glue, i. the procedure must be carried out with a shorter waiting time.
  • the object of the present invention was therefore to develop a method for the separate application of a liquid multi-component glue system, which leads to a more uniform application of the components compared to the prior art.
  • the object has been achieved with a method for the separate application of a liquid multi-component glue system on the surface of wood-based materials either one or more of the components as a cast film in the form of full-surface application of these components on the wood material by means of a full width of the wood material spanning casting curtain applies and the other or all components as strips or cords, which are spaced apart and distributed over the entire surface over the wood material applied, and wherein the components with an applicator unit comprising a reservoir, a distribution chamber and an outflow chamber, which are provided with outlet openings, applied characterized in that the volume flow of the component over all outlet openings is substantially uniform.
  • essentially uniform volumetric flow is understood in the present invention to mean a volumetric flow having fluctuations of at most 10 percent, preferably of not more than 5 percent, in particular of not more than 1 percent, between the individual outlet openings.
  • the volume flow usually has a value of 0.5 l / min to 50 l / min, advantageously 1 l / min to 40 l / min, preferably 2 l / min to 30 l / min.
  • the flow rate is usually between 0.05 and 3 m / s, preferably between 0.1 and 2 m / s and preferably between 0.5 and 1 m / s when entering the distribution chamber.
  • the flow rate when entering the outflow chamber is usually between 0.01 and 1 m / s, advantageously between 0.1 and 0.8 m / s, preferably between 0.4 and 0.6 m / s.
  • a higher pressure prevails in at least one application unit in the distribution chamber than in the outflow chamber; preferably, the pressure in the distribution chamber is twice as great as the pressure in the outflow chamber.
  • the pressure difference is greater than 1 bar.
  • the pressure in the application device should not exceed a value of 10 bar.
  • the pressure in the distribution chamber is advantageously between 1 and 5 bar, preferably 1 to 3 bar, in particular 1, 5 to 2.5 bar.
  • the pressure in the outflow chamber is advantageously between 0 and 2.5 bar, preferably 0.5 to 2 bar, in particular 0.5 to 1 bar.
  • the method according to the invention converts the locally high flow velocity caused by the central connection when the distribution chamber enters into a uniform flow distributed over the entire width when it enters the outflow chamber.
  • the number of outlet openings is suitably adapted to the width of the wood materials. Typically, the number of outlet openings between 10 and 100 per component per wood material width, advantageously between 30 to 70.
  • the width of the wood materials is usually 50 to 500 mm, advantageously 150 to 300 mm.
  • the length of the row of outlet openings is therefore advantageous between 100 and 550 mm, preferably between 250 and 500 mm and in particular between 350 and 450 mm.
  • the size of the outlet openings depends on the viscosity of the liquid emerging therefrom and the feed rate of the wood material.
  • the diameter of the openings is advantageously 0.5 to 5 mm, preferably 1 to 3 mm, in particular 1, 6 to 2 mm.
  • the individual outlet openings are advantageously arranged at a distance of 3 mm to 15 mm, preferably from 4 to 12 mm, in particular from 5 to 9 mm.
  • the openings are suitably arranged in series.
  • several rows can be arranged one behind the other, which are arranged on the gap or directly behind one another.
  • the openings on a separate, removable plate are arranged independently of the rest of the circulation circulation, so that they are easy to replace in case of wear.
  • the feed rate of the material which passes under the applied as a strip or cast film liquid components is suitably 20 to 300 m / min, preferably 50 to 250 m / min, preferably 100 to 200 m / min.
  • the drop height of the cords and / or the cast film is suitably from 5 to 100 mm, advantageously from 10 to 80 mm, preferably from 20 to 50 mm.
  • the multicomponent glue system is preferably a two-component system, wherein a component A is advantageously a glue and a component B is advantageously a hardener.
  • additives known to those skilled in the art may be applied as further components. These additives can be applied separately from the components glue and hardener over a third application unit or in admixture with the glue and / or the hardener.
  • the combined application rate is advantageously 100 to 500 g / m 2 , preferably 200 to 450 g / m 2 , more preferably 250 to 400 g / m 2 .
  • the weight ratio of size to hardener is preferably 100: 20 to 100: 200, preferably 100: 30 to 100: 100, particularly preferably 100: 50 to 100: 100.
  • component A glue
  • glue it is possible to use all glues known to the person skilled in the art.
  • urea-formaldehyde resins for example, urea-formaldehyde resins, melamine-formaldehyde resins, melamine-urea-formaldehyde resins, etherified melamine-formaldehyde resins, phenolic resins, phenol-formaldehyde resins, resorcinol-phenol-formaldehyde resins, polyurethane resins , Polyvinyl acetate resins, emulsions or dispersions of isocyanate resins, or mixtures of two or more components. It is preferred to use aminoplast resins, in particular melamine-urea-formaldehyde resins, etherified melamine-formaldehyde resins, urea-formaldehyde resins or mixtures thereof.
  • the viscosity of the glue resin is 2000 to 4500 Pas, preferably 2500 to 3000 Pas.
  • Component B is advantageously a hardener containing an acid, an acid salt and / or an acid-forming salt.
  • Hardener systems are generally known and are described, for example, in WO 2005/030895 (page 4), WO 2005/097931 (page 5) and WO 2006/015750 (page 4).
  • the hardener is applied to the wood material before the glue.
  • the hardener in the form of cords and the glue in the form of a cast film according to the inventive method is applied to the wood material.
  • the method according to the invention is not limited to a specific application, but it is advantageously used in the wood industry.
  • the method is preferably used for separate application in the bonding of wood, for example in non-supporting applications such as parquet, Rollenh internallykaschtechniken (films on, for example chipboard), veneers, plywood, single-layer boards, multi-layer boards, shuttering panels.
  • the method is advantageously used in load-bearing applications, such as, for example, glulam, duo- or trio-bars (see also WO 02/068178 or EP-A 860 251).
  • the compression of the coated with the components materials is carried out according to the usual methods.
  • the present invention further relates to composite materials comprising a plurality of wood-based materials, which have been glued by the method according to the invention.
  • the present invention further relates to an application device for applying a liquid component
  • the applicator device (1) consists of a distribution chamber (3) and an outflow chamber (4) with outlet openings
  • the distribution chamber (3) consists of a trapezoidal hollow chamber, which centrally Inlet (2) for the application component and below with the outflow chamber (4)
  • the walls of the distribution chamber (3) are formed of four trapezoids, the walls having a bottom length (3i) which is 20 to 100 percent of the length of the outflow chamber (4ii) transverse to the advancing direction (3A), an angle ( ⁇ ) from 20 ° to 85 ° between the bottom edge and the side edge and a ceiling length (3ii) which is 5 to 50% of the floor length (3i), and the walls (3B) have a bottom length (3iii) of 1 mm parallel to the feed direction up to 30 mm, an angle ( ⁇ ) of 85 ° to 135 ° between the bottom edge and the side edge and a ceiling length (3ii) which is 100 to 1000% of the floor length (3iii
  • the sides of the outflow chamber are advantageously closed.
  • the length of the outflow chamber (4ii) is adapted to the length of the outlet openings and thus to the board width.
  • the length (4ii) of the outflow chamber (4) is 100 to 600 mm, preferably 200 to 500 mm, in particular 350 to 450 mm.
  • the bottom length (3i) of the trapezoidal walls (3A) of the distribution chamber is 40 to 100 percent of the length of the outflow chamber (4ii), preferably 50 to 90, in particular 50 to 80 percent of the length of the outflow chamber (4ii).
  • the angle ( ⁇ ) is advantageously 35 ° to 80 °, preferably 45 ° to 75 °, in particular 60 ° to 70 °.
  • Ceiling length (3ii) of the distribution chamber is advantageously 5 to 30 percent of the bottom length (3i), preferably 10 to 30, in particular 10 to 20 percent.
  • the bottom length (3iii) of the trapezoidal walls (3B) of the distribution chamber is 3 mm to 30 mm, preferably 4 mm to 20 mm, in particular 5 mm to 8 mm.
  • the angle ( ⁇ ) is advantageously 90 ° to 135 °, preferably 92 ° to 100 °, in particular 93 ° to 96 °.
  • the ceiling length (3ii) of the distribution chamber is advantageously 200 to 1000 percent of the floor length (3iii), preferably 200 to 800, in particular 400 to 600 percent.
  • the width (4i) of the outflow chamber is advantageously 30 to 80 mm, in particular 35 to 55 mm, or the diameter of the outflow chamber is advantageously 30 to 80 mm, in particular 35 to 55 mm.
  • In the distribution chamber and in the discharge chamber can be guiding organs and distribution-promoting internals such as sieves and / or baffles and the like.
  • the present invention further relates to an applicator unit comprising per component substantially a reservoir, an applicator device according to the invention from a distribution chamber and an outflow chamber, which is provided with outlet openings, optionally a guide element, optionally a drip pan and the associated ring line with two pumps.
  • the present invention relates to a device for applying a liquid multi-component glue system to be glued wood materials with a feed device for the wood materials, one or more arranged above the feed path and extending transversely thereto applicator (1) the side facing the feed path one or a plurality of transversely extending rows of outlet openings (5) and is connected to a reservoir for the component, characterized in that the application device (1) consists of a distribution chamber (3) and an outflow chamber (4), wherein the distribution Chamber (3) consists of a trapezoidal hollow chamber having a central inlet (2) for the application component and the bottom of the outflow chamber (4) is connected, wherein the walls of the distribution chamber (3) are formed of four trapezoids, said Walls transverse to the feed direction (3A) has a bottom length (3i ), which is 20 to 100 percent of the length of the outflow chamber (4ii), an angle ( ⁇ ) of 20 to 85 degrees between the bottom edge and the side edge and a ceiling length (3ii) that is 5 to 50 percent of the floor length (3i).
  • the outflow chamber (4) containing a cylindrical or rectangular hollow body whose width (4i) 20 mm to 100 mm and whose diameter 20 mm to 100 mm and whose length (4ii) is 50 to 1000 mm.
  • the device according to the invention for applying a multi-component system may have one or more application units according to the invention or one or more application units according to the invention in connection with application units from the prior art.
  • the device according to the invention advantageously has two discharge units according to the invention, one for the glue and one for the hardener.
  • the discharge unit is expediently fed with the flowable components via a circulating circuit under pressure, wherein the discharge unit is connected via supply lines to a component reservoir.
  • the pressure is expediently adapted to the required flow rate of the flowable components and is typically in the range from 1 to 10, preferably 2 to 8 bar.
  • the application unit in particular the application unit for the glue, advantageously has between the row (s) of the outlet openings and the feed path a guide plate for the viscous liquids emerging from the openings.
  • the baffle is advantageously made of metal or plastic. The baffle extends along the opening row or rows. The liquid impinging on the guide plate from the openings melts on the surface of the plate so that a uniform and coherent film is formed, which flows from the guide plate onto the surface of the wooden material to be coated.
  • the resulting film tends to contract, it can advantageously be guided and stabilized at its edges. This can be done by means of rigid or movable edges, in which the baffle runs off to the side.
  • air-flow-preventing devices are provided on the guide element and / or in the region of the guide element, as disclosed in DE-A 37 12 347 in columns 3 and 4, as well as in the associated drawings.
  • these are advantageously spatially applied separately from each other, wherein the distance of the application units in the direction of the continuous wood material should be as small as possible, preferably smaller than 50 cm, in particular smaller than 10 cm, but so large that the first applied component is not dragged into the catch basin of the following component.
  • the present invention relates to the use of the application device according to the invention, the application unit according to the invention and / or the device according to the invention for applying a liquid multi-component system for bonding wood-based materials.
  • Fig. 1 application device (1) in an overall view
  • Fig. 2 application device (1), which is divided into their individual components
  • the application device (1) substantially includes an inlet for the application component (2), a distribution chamber (3) and an outflow chamber (4) provided with exit openings (5).
  • the distribution chamber includes a trapezoidal hollow chamber, wherein the walls of the distribution chamber are formed by four trapezoids (twice 3A and twice 3B).
  • the walls of the distribution chamber (3A) are arranged transversely to the feed direction and have a bottom length (3i) an angle ( ⁇ ) between the bottom edge and the side edge and a ceiling length (3ii).
  • the walls of the distribution chamber (3B) are arranged parallel to the feed direction and have a bottom length (3iii) at an angle ( ⁇ ) between the bottom edge and the side edge and a ceiling length (3ii).
  • the outflow chamber includes a cylindrical or rectangular hollow body having a width (4i) and a length (4ii).
  • the advantage of the method according to the invention and of the devices according to the invention lies in a very uniform application of the components, so that the risk of gluing weak points could be limited to a minimum. Furthermore, have produced by the process according to the invention high components with many überchrogeleimten slats on a uniform height. In addition, the pressing time and the waiting time can be optimally adjusted. Due to the uniform distribution of the film is stable even at lower circulation rates. Thus, even slow-moving wood materials can be coated with low application rates.
  • the evenness of the curtain was measured transverse to the running direction of the woodwork materials, in which the film was collected in a measuring cup from the curtain of 400 mm length in five zones of 50 mm length each.
  • the measuring time was 30 seconds. Table 1 summarizes the results of the experiment.
  • Example 1 show that, despite the distribution plate used, no uniform coating of the wood-based materials is possible.
  • Example 2 show that even with the application device according to EP 1 089 827, no uniform coating of the wooden materials is possible.
  • the uniformity of the film according to the invention was investigated transversely to the running direction of the wooden materials, in which the film was collected in a measuring cup from the curtain of 400 mm length in five zones with 50 mm length each.
  • the measuring time was 30 seconds.
  • Table 3 summarizes the results of the experiment.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé et des dispositifs d'application uniforme et séparée d'un système de colle liquide à plusieurs constituants sur la surface de matériaux de bois, ainsi que l'utilisation du procédé et des dispositifs pour l'encollage de matériaux de bois. L'invention concerne également un matériau composite fabriqué selon ledit procédé.
EP07822426A 2006-11-15 2007-11-09 Procede et dispositifs d'application separee d'un systeme de colle liquide a plusieurs constituants Withdrawn EP2091665A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07822426A EP2091665A1 (fr) 2006-11-15 2007-11-09 Procede et dispositifs d'application separee d'un systeme de colle liquide a plusieurs constituants

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06124159 2006-11-15
PCT/EP2007/062137 WO2008058911A1 (fr) 2006-11-15 2007-11-09 Procédé et dispositifs d'application séparée d'un système de colle liquide à plusieurs constituants
EP07822426A EP2091665A1 (fr) 2006-11-15 2007-11-09 Procede et dispositifs d'application separee d'un systeme de colle liquide a plusieurs constituants

Publications (1)

Publication Number Publication Date
EP2091665A1 true EP2091665A1 (fr) 2009-08-26

Family

ID=38961447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07822426A Withdrawn EP2091665A1 (fr) 2006-11-15 2007-11-09 Procede et dispositifs d'application separee d'un systeme de colle liquide a plusieurs constituants

Country Status (3)

Country Link
EP (1) EP2091665A1 (fr)
NO (1) NO20091592L (fr)
WO (1) WO2008058911A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008041423B4 (de) * 2008-08-21 2015-04-16 Fmp Technology Gmbh Fluid Measurements & Projects Beschichtungswerkzeug zum Auftragen eines Flüssigkeitsfilms auf ein Substrat
US8974133B2 (en) * 2010-01-28 2015-03-10 Verwaltungsgesellschaft Fuggerstrasse Gbr Dispensing device with an electric motor
CN102847670A (zh) * 2012-08-16 2013-01-02 青岛华美木业有限公司 一种表面人造板淋涂表面漆工艺
DE202019101681U1 (de) 2019-03-25 2020-06-26 Sulzer Mixpac Ag Verteilerkopf für eine Verteilervorrichtung sowie Verteilervorrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126574A (en) * 1964-03-31 Plow type glue gun
DE2101800C3 (de) * 1971-01-15 1974-06-20 Robert Buerkle & Co, 7290 Freudenstadt Verfahren und Vorrichtung zum Auftragen von Leim bei der Herstellung von Holzleimkonstruktionen
DE2711121C3 (de) * 1977-03-15 1979-12-06 Bayerische Motoren Werke Ag, 8000 Muenchen Auftragsdüse für mittel- bis hochviskose Medien, insbesondere Kleber
EP0919288A3 (fr) * 1997-11-25 2003-10-08 Nordson Corporation Dispositif et procédé d'application par voie électrostatique
EP1447142A1 (fr) * 2003-02-12 2004-08-18 Akzo Nobel N.V. Applicateur de fluide et procédé d'application d'un fluide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008058911A1 *

Also Published As

Publication number Publication date
NO20091592L (no) 2009-07-28
WO2008058911A1 (fr) 2008-05-22

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