DK170808B1 - Method of separately applying a liquid two-component adhesive system to the surface of wooden parts - Google Patents

Method of separately applying a liquid two-component adhesive system to the surface of wooden parts Download PDF

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Publication number
DK170808B1
DK170808B1 DK490989A DK490989A DK170808B1 DK 170808 B1 DK170808 B1 DK 170808B1 DK 490989 A DK490989 A DK 490989A DK 490989 A DK490989 A DK 490989A DK 170808 B1 DK170808 B1 DK 170808B1
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Denmark
Prior art keywords
formaldehyde
components
wooden parts
liquid
component
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DK490989A
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Danish (da)
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DK490989D0 (en
DK490989A (en
Inventor
Claus Neumann
Ulrich-Michael Duda
Eberhard Pfuetze
Juergen Winter
Dieter Karau
Sepp Neuner
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Basf Ag
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
    • C09J161/04—Condensation polymers of aldehydes or ketones with phenols only
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/04—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving separate application of adhesive ingredients to the different surfaces to be joined

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Radiation-Therapy Devices (AREA)
  • Ceramic Products (AREA)
  • Luminescent Compositions (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The present invention relates to a process for the separate application of a liquid two-component adhesive system to the surface of wooden parts, in which one of the two components is applied as a cast film and the other as a strip.

Description

i DK 170808 B1in DK 170808 B1

Opfindelsen angår en fremgangsmåde til separat påføring af et flydende tokomponentlimsystem på overfladen af trædele.The invention relates to a method for separately applying a liquid two-component adhesive system to the surface of wooden parts.

5 Man kender mange fremgangsmåder til påføring af lim på overfladen af trædele. Således beskrives i DE-B 2 101 800 en fremgangsmåde til påføring af lim ved fremstillingen af trælimkonstruktioner, hvorved limen i form af en færdig blanding holdes i et omløbende kredsløb og påføres på 10 bredsiden af værkstoffet i form af snore.5 Many methods for applying glue to the surface of wood parts are known. Thus, DE-B 2 101 800 describes a method for applying glue in the manufacture of wood glue structures, whereby the glue in the form of a finished mixture is kept in a circular circuit and applied on the broad side of the workpiece in the form of cords.

Det er ved denne fremgangsmåde en ulempe, at limen ved sammenpresningen af trædelene stedvis ikke danner nogen sammenhængende film, og at der kan forekomme fejlpositio-15 ner i trælimkonstruktionerne. Desuden er forarbejdningstiden for hver portion begrænset, fordi viskositeten af limen stiger med tiden.It is a disadvantage of this method that the glue does not form any coherent film in the compression of the wood parts and that there may be misalignments in the wood glue structures. In addition, the processing time for each batch is limited because the viscosity of the adhesive increases with time.

I DE-A 2 416 032 beskrives en fremgangsmåde til sammen-20 føjning af træprodukter, hvorved den flydende harpiks og det flydende hærdemiddel i hvert tilfælde er adskilt ved hjælp af en påstrygningsfordeler.DE-A 2 416 032 describes a method for joining wood products, whereby the liquid resin and liquid curing agent are separated in each case by means of an ironing distributor.

Det er en ulempe ved denne fremgangsmåde, at der ved si-25 den af den ovenfor angivne dannelse af fejlpositioner desuden også stedvis kan forekomme utilstrækkelig sammenblanding af hærdemiddel og harpiks, hvorved der kan opstå befugtede steder, der ikke udhærder eller kun udhærder utilstrækkeligt.It is a disadvantage of this method that, in addition to the formation of error positions mentioned above, insufficient mixing of the curing agent and resin may also occur, whereby wetted sites which do not cure or cure insufficiently may occur.

3030

Fra EP-A-241 891 kendes et apparat til påføring af lim på trædele, hvorved der dannes en støbefilm ved hjælp af et ledeorgan. I tysk patentansøgning nr. 37 12 347.5 beskrives der i forbindelse med dette ledeorgan desuden forbed-35 ringer i form af luftopstuvningshindrende organer. Limharpiksen og hærdemidlet påføres separat med i hvert tilfælde et af disse organer som støbefilm på overfladen af DK 170808 B1 2 trædelene.EP-A-241 891 discloses an apparatus for applying glue to wooden parts, thereby forming a molding film by means of a guide member. In addition, German Patent Application No. 37 12 347.5 discloses in connection with this guide means improvements in the form of air-dusting means. The adhesive resin and curing agent are applied separately with in each case one of these means as cast film on the surface of the DK 170808 B1 2 wood parts.

Ved denne påføringsmåde kan det forekomme, at den i mængdemæssig henseende meget mindre andel af hærdemiddel 5 frembringer filmafrivninger ved høje gennemløbshastigheder af det træ, der skal overtrækkes, med den konsekvens, at der i det sammenlimede træ forekommer fejlpositioner på grund af den ikke udhærdede lim.In this application, it may occur that in quantitative terms, a much smaller proportion of curing agent 5 produces film rubbing at high throughput rates of the wood to be coated, with the consequence that in the glued wood there are misalignments due to the non-cured glue. .

10 Det er opfindelsens formål at tilvejebringe en fremgangsmåde til påføring af et flydende tokomponent-limsystem, som muliggør en regelmæssig påføring af begge komponenter ved en gennemblanding, der er så god som muligt, og som undgår fejlpositioner i form af ikke befugtede flader el-15 ler ufuldkommen gennemblanding af komponenterne.It is an object of the invention to provide a method for applying a liquid two-component adhesive system which allows for regular application of both components at a blend that is as good as possible and which avoids failure positions in the form of non-wetted surfaces or the like. laughs imperfect mixing of the components.

Dette opnås ved fremgangsmåden ifølge opfindelsen, der er af den i indledningen til krav 1 angivne art og som er ejendommelig ved det i den kendetegnende del af krav 1 20 angivne.This is achieved by the method according to the invention, which is of the kind specified in the preamble of claim 1 and which is characterized by the characterizing part of claim 1.

Det til denne fremgangsmåde nødvendige apparat i henhold til tysk patentansøgning nr. P 37 12 347.5 er kendt til påføring af limharpiks og er ikke genstand for den fore-25 liggende ansøgning. Dette apparat består i det væsentlige af en forrådsbeholder, et støbehoved, der er udformet som cylindrisk hullegeme, og som er forsynet med udgangsåbninger og et ledeorgan, et fremføringsorgan for det træ, der skal overtrækkes, et optagerkar og den dertil hørende 30 ringledning med to pumper. Væsentligt for metoden er de organer, der forhindrer luftopstuvning, ved støbehovedets ledeorgan.The apparatus required for this process according to German Patent Application No. P 37 12 347.5 is known for applying adhesive resin and is not the subject of the present application. This apparatus consists essentially of a storage container, a casting head, which is configured as a cylindrical hollow body and provided with exit apertures and a guide member, a feeding means for the wood to be coated, a receiving vessel and the associated annulus with two pumps. Essential to the method are the air-preventing means at the casting head guide.

Påstrygningsofordelingsorganet til påføring af en kompo-35 nent er ligeledes kendt og er beskrevet i DE-AS 21 01 800.The ironing distributor for applying a component is also known and is described in DE-AS 21 01 800.

DK 170808 B1 3 På grund af den separate påføring af de to flydende komponenter kan begge føres i kredsløb i vilkårligt lange tidsrum uden nogen mellemrensning i apparatet.Due to the separate application of the two liquid components, both can be circulated for any length of time without any intermediate cleaning in the apparatus.

5 Fremgangsmåden ifølge opfindelsen muliggør anvendelsen af forskelligartede, flydende lim, f.eks. aminoplast- eller phenoplast-harpikser, såsom formaldehyd-urinstof-kondensater, formalsehyd-urinstof-melamin-kondensater, formal-dehyd-urinstof-melamin-phenol-kondensater, formaldehyd-10 phenol-kondensater, formaldehyd-phenol/resorcin-kondensa- ter eller resorcin/formaldehyd-kondensater eller 4,4'-di-phenylmethandiisocyanat.The process according to the invention enables the use of various liquid adhesives, e.g. aminoplast or phenoplast resins such as formaldehyde-urea condensates, formalsehyde-urea-melamine condensates, formaldehyde-urea-melamine-phenol condensates, formaldehyde-phenol condensates, formaldehyde-phenol / resorcin condensates or resorcin / formaldehyde condensates or 4,4'-diphenylmethane diisocyanate.

Som hærdemiddel for aminoplast-harpikserne er syreholdige 15 og syredannende forbindelser velegnet. Fortrinsvis anven der man ammoniumsalte, organiske og uorganiske syrer. Som hærdemiddel for phenoplast-harpikserne er formaldehyd og/eller formaldehydfraspaltende forbindelser velegnet. Hærdemiddeldoseringen retter sig efter de tilstræbte ud-20 hærdningstider.As a curing agent for the aminoplast resins, acid-containing and acid-forming compounds are suitable. Preferably ammonium salts, organic and inorganic acids are used. As a curing agent for the phenoplast resins, formaldehyde and / or formaldehyde decomposing compounds are suitable. The curing dosage adheres to the desired cure times.

De flydende komponenter er både anvendelige i thixotrope og i ikke thixotrope indstillinger. De thixotrope indstillinger, indeholder sædvanlige thixotroperingsmidler, 25 såsom silicater.The liquid components are useful in both thixotropic and non-thixotropic settings. The thixotropic settings contain conventional thixotropic agents such as silicates.

Viskositeten af limharpiksen ligger mellem 100 og 10000, fortrinsvis mellem 500 og 50000 Pas.The viscosity of the adhesive resin is between 100 and 10000, preferably between 500 and 50000 Pas.

30 Fremføringshastigheden af det træ, der løber under de som film eller påstrygning påførte flydende komponenter, andrager mellem 0,5 og 4 m/sekund, fortrinsvis 1,5 til 3 m/sekund.The feed rate of the wood running under the liquid components applied as a film or ironing is between 0.5 and 4 m / sec, preferably 1.5 to 3 m / sec.

35 Den totale påføring af de to flydende komponenter andra ger derved 40 til 600 g/m2.The total application of the two liquid components others thus yields 40 to 600 g / m2.

4 DK 170808 B1 I henhold til fremgangsmåden Ifølge opfindelsen opnår man trædele med et regelmæssigt limlag, hvilke trædele er velegnet til fremstilling af sammenlimede trædele.4 DK 170808 B1 According to the method According to the invention, wooden parts with a regular glue layer are obtained, which wooden parts are suitable for making glued wooden parts.

5 EKSEMPELEXAMPLE

Fremgangsmåden ifølge opfindelsen blev udøvet ved limeforsøg med prøvestykker med bøgetræ med et format 150 x 300 mm.The method according to the invention was carried out by gluing tests with beechwood specimens with a format of 150 x 300 mm.

1010

Et phenol-resorcin-formaldehyd-kondensationsprodukt i molforholdet phenol:resorcin:formaldehyd 1:0,8:1, med et tørstofindhold af 65+1 vægt-% (2 h/120 °C) og en viskositet ved 20 °C af ca. 2700 mPa*s blev påført på prøvestyk-15 kerne ved hjælp af en støbefilm. Den påførte mængde lå ved ca. 320 g/ma. Derpå påførte man et flydende hærdemid-del, der bestod af ca. 10% formaldehyd samt fyldstoffer, hjælpemidler og thixotroperingsmidler i form af påstryg-ninger.A phenol-resorcine-formaldehyde condensation product in the phenol-molar ratio of phenol: resorcine: formaldehyde 1: 0.8: 1, with a solids content of 65 + 1% by weight (2h / 120 ° C) and a viscosity at 20 ° C of approx. . 2700 mPa * s was applied to the sample core by a casting film. The amount applied was at approx. 320 g / mo. Then a liquid curing agent consisting of approx. 10% formaldehyde as well as fillers, auxiliaries and thixotroping agents in the form of coats.

2020

Den påførte mængde af hærdemiddel androg ca. 110 g/m*. Derpå bestemte man i forbindelse med de limede prøvestykker i henhold til DIN 53 254, afsnit 5, bindingsstyrkerne ved rumklima samt under vekslende klimabetingelser i hen-25 hold til DIN 68 141 i forbindelse med DIN 53 254. I alle tilfælde opnåede eller overskred man de i henhold til normen krævede minimale bindingsstyrker.The amount of curing agent applied was approx. 110 g / m *. Then, in connection with the glued specimens in accordance with DIN 53 254, section 5, the bonding strengths at room climate and under alternating climatic conditions were determined according to DIN 68 141 in connection with DIN 53 254. In all cases, the according to the norm required minimum bond strengths.

30 3530 35

Claims (6)

1. Fremgangsmåde til separat påføring af et flydende to- 5 komponentlimsystem på overfladen af trædele, kende tegnet ved, at man påfører den ene af de to komponenter som støbefilm i form af regelmæssig påføring af denne komponent på trædelen ved hjælp af et støbeforhæng, som overspænder hele bredden af trædelen og den anden 10 komponent påføres i form af striber, hvilke er indbyrdes adskilte og regelmæssigt fordelt over trædelen.A method of separately applying a liquid two-component adhesive system to the surface of wooden parts, characterized in that one of the two components is applied as a molding film in the form of regular application of this component to the wooden part by means of a molding curtain which spans the entire width of the wood part and the other component is applied in the form of strips which are spaced apart and regularly distributed over the wood part. 2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at man holder mindst en af komponenterne i et omlø- 15 bende kredsløb.Method according to claim 1, characterized in that at least one of the components is kept in a circular circuit. 3. Fremgangsmåde ifølge krav 1 eller 2, kendetegnet ved, at man holder en af komponenterne i omløbende kredsløb igennem en forrådsbeholder, igennem en med et 20 ledeorgan forsynet støbehoved, hvorunder der er anordnet et fremføringsorgan til trædelene, og igennem et optagerkar.Method according to claim 1 or 2, characterized in that one of the components in a circular circuit is held through a storage container, through a casting head provided with a guide member, under which a feeding member is provided for the wooden parts, and through a recording vessel. 4. Fremgangsmåde ifølge krav 1 til 3, kendeteg-25 net ved, at man påfører en af komponenterne som snore eller striber på overfladen af trædelene.Method according to claims 1 to 3, characterized in that one of the components is applied as a cord or strip on the surface of the wooden parts. 5. Fremgangsmåde ifølge krav 1 til 4, kendetegnet ved, at man som en af komponenterne anvender en 30 urinstof-formaldehyd-, urinstof-melamin-formaldehyd-, urinstof-melamin-phenol-formaldehyd-harpiks og at man som den anden komponent anvender en syredannende og/eller en syreindeholdende forbindelse som hærdemiddel. 35Process according to claims 1 to 4, characterized in that one of the components uses a urea-formaldehyde, urea-melamine-formaldehyde, urea-melamine-phenol-formaldehyde resin and is used as the second component. an acid-forming and / or an acid-containing compound as a curing agent. 35 6. Fremgangsmåde ifølge krav 1 til 5, kendeteg net ved, at man som den ene komponent anvender en phenol -formaldehyd-, resorcin-formaldehyd-, phenol-resorcin- 6 DK 170808 B1 vender en forbindelse, der indeholder formaldehyd eller fraspalter formaldehyd, i form af et hærdemiddel. 5 10 15 20 25 30 35Process according to claims 1 to 5, characterized in that one compound utilizing a phenol-formaldehyde, resorcin-formaldehyde, phenol-resorcin-6 DK 170808 B1 is a compound containing formaldehyde or decomposed formaldehyde, in the form of a curing agent. 5 10 15 20 25 30 35
DK490989A 1988-10-06 1989-10-05 Method of separately applying a liquid two-component adhesive system to the surface of wooden parts DK170808B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3834026 1988-10-06
DE3834026A DE3834026A1 (en) 1988-10-06 1988-10-06 METHOD FOR SEPARATELY APPLYING A LIQUID, TWO-COMPONENT GLUE SYSTEM TO THE SURFACE OF WOODEN PARTS

Publications (3)

Publication Number Publication Date
DK490989D0 DK490989D0 (en) 1989-10-05
DK490989A DK490989A (en) 1990-04-07
DK170808B1 true DK170808B1 (en) 1996-01-22

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ID=6364524

Family Applications (1)

Application Number Title Priority Date Filing Date
DK490989A DK170808B1 (en) 1988-10-06 1989-10-05 Method of separately applying a liquid two-component adhesive system to the surface of wooden parts

Country Status (7)

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EP (1) EP0362742B1 (en)
AT (1) ATE115900T1 (en)
DE (2) DE3834026A1 (en)
DK (1) DK170808B1 (en)
ES (1) ES2065964T3 (en)
FI (1) FI89878C (en)
NO (1) NO176324C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1270541B (en) * 1993-05-18 1997-05-06 Manea Srl Off Mec Flli IN-LINE GLUING METHOD OF EDGES TO PANEL SIDES IN A EDGE BANDING MACHINE
CA2335374C (en) 1998-06-22 2005-01-18 Akzo Nobel N.V. Device and method for application of a gluing system
AT411374B (en) 2000-06-06 2003-12-29 Kaindl M COATING, COVERING OR THE LIKE, PANELS FOR ITS EDUCATION AND METHOD AND DEVICE FOR PRODUCING THE PANELS
US6458417B2 (en) 2000-07-07 2002-10-01 Akzo Nobel N.V. Method of gluing
DE10121953A1 (en) * 2001-05-05 2002-11-14 Claus Mohr Carrier device for multi-component adhesive
DE10246775A1 (en) * 2002-10-07 2004-04-15 Basf Ag Wood components, are joined together by warming them in an electromagnetic field and then applying adhesive

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416032C3 (en) * 1974-03-27 1982-04-01 Aktiebolaget Casco, Stockholm Method for gluing wooden parts
DE3612973A1 (en) * 1986-04-17 1987-10-29 Basf Ag DEVICE FOR APPLYING GLUE TO WOOD PARTS

Also Published As

Publication number Publication date
EP0362742A2 (en) 1990-04-11
NO176324C (en) 1995-03-15
DE58908798D1 (en) 1995-02-02
FI894300A0 (en) 1989-09-12
EP0362742A3 (en) 1992-02-26
DK490989D0 (en) 1989-10-05
DK490989A (en) 1990-04-07
ES2065964T3 (en) 1995-03-01
FI89878B (en) 1993-08-31
FI894300A (en) 1990-04-07
FI89878C (en) 1993-12-10
ATE115900T1 (en) 1995-01-15
NO893972L (en) 1990-04-09
NO893972D0 (en) 1989-10-05
NO176324B (en) 1994-12-05
EP0362742B1 (en) 1994-12-21
DE3834026A1 (en) 1990-04-12

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