EP0512975B1 - Holzfaserdämmplatte - Google Patents

Holzfaserdämmplatte Download PDF

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Publication number
EP0512975B1
EP0512975B1 EP92890038A EP92890038A EP0512975B1 EP 0512975 B1 EP0512975 B1 EP 0512975B1 EP 92890038 A EP92890038 A EP 92890038A EP 92890038 A EP92890038 A EP 92890038A EP 0512975 B1 EP0512975 B1 EP 0512975B1
Authority
EP
European Patent Office
Prior art keywords
board
hydrophobic
wood
bitumen
wood fibre
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.)
Expired - Lifetime
Application number
EP92890038A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0512975A1 (de
Inventor
Leopold Ronijak
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.)
LEITGEB AG
Original Assignee
LEITGEB AG
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 LEITGEB AG filed Critical LEITGEB AG
Publication of EP0512975A1 publication Critical patent/EP0512975A1/de
Application granted granted Critical
Publication of EP0512975B1 publication Critical patent/EP0512975B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents

Definitions

  • the invention relates to a wood fiber insulation board, which is made waterproof by hydrophobing agents.
  • the invention further relates to a method for producing a hydrophobic wood fiber insulation board in the wet process.
  • bitumen board a wood fiber insulation board made hydrophobic by adding bitumen emulsion (cf. DIN 68752 or ⁇ NORM 3006) ("bitumen board").
  • bitumen board contains 12% bitumen, based on the wood fiber mass (atro).
  • a disadvantage of the known boards is not only the addition of bitumen, which is questionable in terms of environmental protection, but also the dark brown to black coloring of the board and finally the limited wet strength.
  • this water repellent and swelling protection agent consists primarily of longer paraffin hydrocarbons with a content of n- and iso-alkanes of at least 30% and optionally synthetic hydrocarbon resins.
  • US-A-4 256 491 describes a composition for rendering objects water-repellent, the agent being applied to the surface or being processed into sheet-like films.
  • the incorporation of the agent into a fiber mass is not known from US Pat. No. 4,256,491.
  • EP-A-107 155 relates to a method for improving the water resistance of molded parts which are produced from a cellulose-containing pulp slurry by pressing, using an isocyanate-containing resin and which is unstressed Part of isocyanate-containing resin and the molded parts are to be separated from one another at the appropriate time.
  • the invention has for its object to provide a hydrophobic wood fiber insulation board which does not have the disadvantages described above and which is bitumen-free.
  • Preferred embodiments of the wood fiber insulation board according to the invention are the subject of the dependent claims.
  • the wood fiber insulation board according to the invention surpasses the known wood fiber insulation boards hydrophobized by bitumen emulsion additives in several properties.
  • the wood fiber insulation board according to the invention has a higher flexural strength, the higher flexural strength also being present after storage in water for 24 hours.
  • the water absorption of the wood fiber insulation board according to the invention is reduced compared to the known wood fiber insulation boards which have been made hydrophobic by adding a bitumen emulsion.
  • wood fiber insulation board according to the invention is that it is no longer dark brown to black like the bitumen boards, but rather resembles normal wood fiber insulation boards that have not been rendered hydrophobic by adding bitumen.
  • the process according to the invention for producing a hydrophobicized wood fiber insulation board in the wet process which contains a bitumen-free hydrophobicizing agent, consists in admixing the bitumen-free hydrophobicizing agent with the wood fibers in an amount of at most 5% by weight, preferably 2% by weight, based on the wood fiber that a fixing agent is then added and mixed with the wood fibers and the hydrophobizing agent in order to fix the hydrophobizing agent on the individual wood fibers and that, if appropriate, after an intermediate storage of the hydrophobized wood fibers Fiber mat is formed, which is processed into wood fiber insulation board.
  • BVR board wood fiber insulation boards
  • the process for producing the wood fiber insulation board according to the invention does not differ from that of fiber production to blending from that of the known (hydrophobized) wood fiber insulation boards ("bitumen boards”) modified by adding bitumen emulsion.
  • the hydrophobicizing agent for example reinforced natural resins
  • the hydrophobicizing agent is first introduced into the mixed Netherlands in the form of an aqueous dispersion with a solids content of 45% (trade name: Furtin BVR 50, manufacturer: Chemische Werke Franz v. Furtenbach Ges.mbH in Wr. Neustadt).
  • the fixative for example an oliogomeric aluminum dicyandiamide condensate
  • FURTOFIX B3 manufacturer: Chemische Werke Franz v. Furtenbach Ges.mbH in Wiener Neustadt
  • the finished pulp is pumped off and stored in the storage chest until processing.
  • the material prepared in this way reaches the dewatering machine and is formed on it to form an endless plate.
  • the further procedure, such as the pressing and drying of the wood fiber insulation boards produced corresponds to the procedure in the production of bitumen boards.
  • bitumen-free hydrophobizing agents such as the hydrophobizing agent mentioned as an example
  • bitumen emulsions A major advantage when using bitumen-free hydrophobizing agents, such as the hydrophobizing agent mentioned as an example, over the use of bitumen emulsions is the pH at which the work is carried out. If a bitumen emulsion is added, the pH value is adjusted to 4.5 to 4.7, i.e. in the acidic range, by adding aluminum sulfate.
  • the improved physical properties achieved according to the invention are achieved at a pH range from 5.5 to 7.0, that is to say in an almost neutral range.
  • the return water from the Fourdrinier machine and the press can be reused as dilution or production water without neutralization, as indicated in the attached flow diagram.
  • wood fiber insulation boards waterproofed by bitumen-free hydrophobizing agents are given below. The physical values achieved in each case are also mentioned.
  • hydrophobized wood fiber insulation boards specified in Examples 12 to 19 have different and sometimes high values for water absorption, since the fiber mixture consists of 50% Fi.Hg.i.R. (foreign), 40% Fi.Sp.i.R. and 10% larch, and it could not be avoided that the accumulation of larch was partially high and this resulted in increased water absorption values.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Paper (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Reinforced Plastic Materials (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Filtering Materials (AREA)
  • Panels For Use In Building Construction (AREA)
EP92890038A 1991-05-06 1992-02-17 Holzfaserdämmplatte Expired - Lifetime EP0512975B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT939/91 1991-05-06
AT0093991A AT396137B (de) 1991-05-06 1991-05-06 Holzfaserdaemmplatte

Publications (2)

Publication Number Publication Date
EP0512975A1 EP0512975A1 (de) 1992-11-11
EP0512975B1 true EP0512975B1 (de) 1993-12-22

Family

ID=3503323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92890038A Expired - Lifetime EP0512975B1 (de) 1991-05-06 1992-02-17 Holzfaserdämmplatte

Country Status (6)

Country Link
EP (1) EP0512975B1 (cs)
AT (2) AT396137B (cs)
CS (1) CS71292A3 (cs)
DE (1) DE59200036D1 (cs)
HU (1) HU213247B (cs)
PL (1) PL293899A1 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007007168A1 (de) * 2007-02-09 2008-08-21 J. Rettenmaier & Söhne Gmbh + Co. Kg Verfahren zum Herstellen von hydrophobem Gut in Gestalt von Formkörpern oder Granulaten oder Kompaktaten

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618271C2 (de) * 1996-05-07 1999-10-28 Edmund Zimmermann Verfahren zur Herstellung von Formkörpern aus fasrigen Pflanzenteilen und/oder Naturfasern und entsprechende Formkörper
DE19647240B4 (de) * 1996-11-15 2005-06-09 Fritz Homann Gmbh & Co. Kg Holzfaserplatte und Verfahren zu ihrer Herstellung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2034208A1 (en) * 1970-07-10 1972-03-02 Hermann Ter Hell & Co, 2000 Hamburg Waterproofing chipboard and cardboard - by incorporating paraffin hydrocarbons
US4256491A (en) * 1977-09-01 1981-03-17 Champion International Corporation Waterproofing composition and method of making the same
DE3239094A1 (de) * 1982-10-22 1984-04-26 Deutsche Fibrit Gesellschaft Ebers & Dr. Müller mbH, 4150 Krefeld Verfahren und vorrichtung zur verstaerkung von faserstoff-formteilen
US5082528A (en) * 1990-12-07 1992-01-21 Eaglebrook, Inc. Iron salts as retention agents

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WORLD PATENTS INDEX LATEST,Week 8347, Derwent Publications Ltd., London (GB), AN: 83-823453 c47! *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007007168A1 (de) * 2007-02-09 2008-08-21 J. Rettenmaier & Söhne Gmbh + Co. Kg Verfahren zum Herstellen von hydrophobem Gut in Gestalt von Formkörpern oder Granulaten oder Kompaktaten

Also Published As

Publication number Publication date
HUT63794A (en) 1993-10-28
CS71292A3 (en) 1992-11-18
HU9201155D0 (en) 1992-08-28
ATA93991A (de) 1992-10-15
PL293899A1 (en) 1992-11-16
EP0512975A1 (de) 1992-11-11
DE59200036D1 (de) 1994-02-03
HU213247B (en) 1997-04-28
ATE99009T1 (de) 1994-01-15
AT396137B (de) 1993-06-25

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