EP0085159A1 - Verfahren zur Herstellung von Presslingen - Google Patents

Verfahren zur Herstellung von Presslingen Download PDF

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Publication number
EP0085159A1
EP0085159A1 EP82111456A EP82111456A EP0085159A1 EP 0085159 A1 EP0085159 A1 EP 0085159A1 EP 82111456 A EP82111456 A EP 82111456A EP 82111456 A EP82111456 A EP 82111456A EP 0085159 A1 EP0085159 A1 EP 0085159A1
Authority
EP
European Patent Office
Prior art keywords
chips
wetted
chip
hardening
reaction
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Withdrawn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
EP82111456A
Other languages
German (de)
English (en)
French (fr)
Inventor
Kurt Held
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0085159A1 publication Critical patent/EP0085159A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent

Definitions

  • the invention relates to a process for the production of compacts such as chipboard or fiberboard from mixtures of chips or fibers from wood, woody parts of plants or vegetable or mineral fibers and organic binders and reaction accelerators hardening by polycondensation or polyaddition with or without the addition of heat.
  • thermosetting binders for example urea, melamine or phenol-formaldehyde resins
  • hardener accelerators are added regularly to the binder solution, which alone or together with the heat supplied accelerate the binder hardening and thus the production process.
  • the invention is based on the object of overcoming these limitations and achieving a further reduction in the hardening times with, in case of doubt, rather less heat, ie energy, for the hardening process.
  • the chipboard or fiberboard in which the individual chips or fibers are connected to one another by liquid or melting, in any case, however, irreversibly hardening binders under pressure, optionally with additional supply of heat.
  • the purpose of the invention is to accelerate the curing or joining process to increase the production quantity per unit of time.
  • the chip or fiber cakes consist of two different chip or fiber components A and B, one of which, A, by dividing the originally intended chip or fiber mass in an appropriately selected relation to one another with the binder, the other, B, but with a hardener of high chemical reactivity is superficially wetted.
  • the number of contact points or areas between A and B chips increases rapidly up to the extent determined by the degree of compaction, and the binder hardening proceeds quickly and according to the chosen reactivity of the hardener the cross section uniform.
  • the method according to the invention is particularly effective when the uncompressed chips or fibers are heated to a temperature which is favorable for binder hardening by known methods before or during the build-up of the chip cake, since, contrary to their effect, this heat, as mentioned, does not result in the binder being pre-hardened leads, with the exception of the few harmless contact points. Rather, their effect occurs during the compression of the A and B chips matrix according to the mechanism described above only at the most convenient time for the task.
  • deIn it is possible to deviate the procedure in a targeted manner deIn to come to special mechanisms of action. It may be expedient to assign the binder as part of component A to a specific shape or classification of the chips, but the hardener as an effective part of component B of the chip cake to a different shape or classification, for example particularly fine-fiber or long chips. It may also be appropriate to sprinkle a fiber serving only as a carrier of the hardening substance - or another suitable form of material, for example fine leaflets - in the chip cake, or to use reinforcing agents to be incorporated, for example glass fibers.
  • binder and hardener are only brought together in a resin-chip or resin-fiber matrix at the last possible moment in order to be able to work with binder-hardener mixtures with the shortest possible reaction time.
  • the advantages of the process are obvious.
  • the quick hardening reaction begins, with the exception of the few harmless contact points in the poured chip cake, at the most convenient time of the process, with the chip cake becoming denser. Since the chips of components A and B and thus the binder and hardener do not touch, the influence of time and temperature on the undensified chip cake is not critical, nor is the reactivity of the selected hardener.
  • the heat can be supplied to the chip cake before or during assembly, it is immediately present when the hardening process starts and works without the delay caused by the supply. It is sufficient to keep the press plates or press plates forming the chip cake at a temperature which prevents the heat from flowing out of the cake. The undesirable effects of hot pressing surfaces on the compact surface and on the vapor pressure inside do not occur.
  • the invention is illustrated by the following example: 100 kg of wood chips from wood with a residual moisture of 4% are mixed with 16 kg of 50% aqueous solution of a urea resin in a spray mixer and, with gentle drying to 5 - 7% residual moisture, fed to a spreading machine, which uses the glue-coated or binder-containing chips as Part (A), as is known, is sprinkled into a single or multi-layer chip cake with 20 kg of fine fiber chips with 5 - 7% residual moisture, which is sprayed separately and in parallel with the processing of the raw wood chips with 0.8 kg of 20% aqueous solution of ammonium chloride as hardener and passed as component (B) to a second spreader, which it continuously sprinkles into the chip flow of the first spreader that supplies component (A) and in the ratio of the above-mentioned component weights. It is important that the chips of components (A) and (B) mix in free fall in this ratio and build up into a loose chip cake, which is then compressed under pressure and subjected to the complete reaction

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Laminated Bodies (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP82111456A 1982-01-14 1982-12-10 Verfahren zur Herstellung von Presslingen Withdrawn EP0085159A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3200914 1982-01-14
DE19823200914 DE3200914A1 (de) 1982-01-14 1982-01-14 Verfahren zur herstellung von presslingen

Publications (1)

Publication Number Publication Date
EP0085159A1 true EP0085159A1 (de) 1983-08-10

Family

ID=6153040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82111456A Withdrawn EP0085159A1 (de) 1982-01-14 1982-12-10 Verfahren zur Herstellung von Presslingen

Country Status (4)

Country Link
US (1) US4526737A (enrdf_load_stackoverflow)
EP (1) EP0085159A1 (enrdf_load_stackoverflow)
JP (1) JPS58136430A (enrdf_load_stackoverflow)
DE (1) DE3200914A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6815175B2 (en) 2001-03-16 2004-11-09 Cornell Research Foundation, Inc. Anti-amyloid peptide antibody based diagnosis and treatment of a neurological disease or disorder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6908295B2 (en) * 2000-06-16 2005-06-21 Avery Dennison Corporation Process and apparatus for embossing precise microstructures and embossing tool for making same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902550C (de) * 1951-12-05 1954-01-25 Max Himmelheber Dipl Ing Verfahren zur Herstellung von Holzspanwerkstoffen
CH448504A (de) * 1965-07-17 1967-12-15 Schenck Gmbh Carl Verfahren und Anlage zur Herstellung gepresster Körper, insbesondere Platten aus Streugut
AT334068B (de) * 1972-02-14 1976-12-27 Oesterr Hiag Werke Ag Verfahren zur herstellung von leichtspanholzplatten
DE2101392B2 (de) * 1970-01-19 1977-01-27 Dabernig, Josef, Radenthein; Herz, Josef Paul, Ferndorf; (Österreich) Verfahren zur herstellung eines leichtbaukoerpers
FR2490142A1 (fr) * 1980-09-15 1982-03-19 23 Szamu Allami Epitoipari Val Procede pour la fabrication de panneaux isolants a partir de dechets agricoles fibreux et d'un liant

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2033411A (en) * 1932-09-06 1936-03-10 Pacific Lumber Co Manufacture of artificial lumber and pressed and molded products
US2543101A (en) * 1944-07-20 1951-02-27 American Viscose Corp Composite fibrous products and method of making them
US2870110A (en) * 1956-09-26 1959-01-20 Dow Chemical Co Porous composition containing a phenolaldehyde resin, method of preparation, and article fabricated therefrom
DE1198539B (de) * 1958-04-23 1965-08-12 Max Himmelheber Dipl Ing Verfahren zur Herstellung von Spanplatten und Spanholzkoerpern
DE1161415B (de) * 1960-09-30 1964-01-16 Ulrich Gottschalk Verfahren und Einrichtung zum Herstellen von Platten aus mit einem Bindemittel versehenen Spaenen und/oder Fasern, insbesondere aus Holz
US3207819A (en) * 1961-07-13 1965-09-21 Miller Hofft Inc Method of making fibreboard
DE1234016B (de) * 1965-08-03 1967-02-09 Cassella Farbwerke Mainkur Ag Verfahren zur Herstellung von wetter- und feuchtigkeitsbestaendigen Holzspanplatten
US3969454A (en) * 1971-12-10 1976-07-13 Canadian Patents And Development Limited Method of making colored particleboard
US3950472A (en) * 1975-02-26 1976-04-13 Continental Can Company, Inc. Molding wood articles from ammonium salt-wood particle mixtures
US4257995A (en) * 1979-05-03 1981-03-24 The Upjohn Company Process for preparing particle board and polyisocyanate-phosphorus compound release agent composition therefor
US4405542A (en) * 1982-01-25 1983-09-20 Greer Marian B Method for the production of a composite material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902550C (de) * 1951-12-05 1954-01-25 Max Himmelheber Dipl Ing Verfahren zur Herstellung von Holzspanwerkstoffen
CH448504A (de) * 1965-07-17 1967-12-15 Schenck Gmbh Carl Verfahren und Anlage zur Herstellung gepresster Körper, insbesondere Platten aus Streugut
DE2101392B2 (de) * 1970-01-19 1977-01-27 Dabernig, Josef, Radenthein; Herz, Josef Paul, Ferndorf; (Österreich) Verfahren zur herstellung eines leichtbaukoerpers
AT334068B (de) * 1972-02-14 1976-12-27 Oesterr Hiag Werke Ag Verfahren zur herstellung von leichtspanholzplatten
FR2490142A1 (fr) * 1980-09-15 1982-03-19 23 Szamu Allami Epitoipari Val Procede pour la fabrication de panneaux isolants a partir de dechets agricoles fibreux et d'un liant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6815175B2 (en) 2001-03-16 2004-11-09 Cornell Research Foundation, Inc. Anti-amyloid peptide antibody based diagnosis and treatment of a neurological disease or disorder

Also Published As

Publication number Publication date
JPH0327364B2 (enrdf_load_stackoverflow) 1991-04-15
DE3200914C2 (enrdf_load_stackoverflow) 1988-12-15
DE3200914A1 (de) 1983-07-28
US4526737A (en) 1985-07-02
JPS58136430A (ja) 1983-08-13

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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