EP0548758A1 - Panneau et procédé pour sa fabrication - Google Patents
Panneau et procédé pour sa fabrication Download PDFInfo
- Publication number
- EP0548758A1 EP0548758A1 EP92121335A EP92121335A EP0548758A1 EP 0548758 A1 EP0548758 A1 EP 0548758A1 EP 92121335 A EP92121335 A EP 92121335A EP 92121335 A EP92121335 A EP 92121335A EP 0548758 A1 EP0548758 A1 EP 0548758A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- binder
- water
- approximately
- fleece
- mixture
- 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.)
- Granted
Links
Images
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
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
-
- 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
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
Definitions
- the invention relates to a method for producing plates according to the preamble of patent claim 1 and a plate according to the preamble of patent claim 8.
- nonwovens also called chip cakes
- the surface of nonwovens also called chip cakes
- a process for the production of surface-treated chip moldings in which a chemically reactive substance is added to a mixture consisting of comminuted, organic fiber materials and a binder, and after a cold pre-compression of this mixture onto the surface of the pre-compact, a thermosetting plastic resin sprayed on or poured on, which is already in the cold condition is precondensed.
- the invention has for its object to provide a method with which a chipboard, wood fiber or the like plate can be produced or to create a chipboard, wood fiber or the like plate that has a high bending strength, a smooth with a comparatively low binder content and has a closed and sealed surface and has no tendency to stick to the pressing surfaces.
- the binder mixture also contains a reaction-accelerating component which, in cooperation with the other two components, ensures rapid curing of the binder in the press nip and contributes to adhesive effects the pressing surfaces are avoided and an optimally sealed outer layer is obtained.
- the thermosetting binder containing a reaction-accelerating component applied directly in front of the press nip in the form of a mist to the nonwoven surface thereby avoiding that in the cold state precondensation and an undesirable boundary layer formation impairing the strength of the plates produced occur.
- the total binder content can be reduced both in the case of a single-layer and in a multi-layer nonwoven structure, and at the same time a high flexural strength can be achieved.
- thermosetting binder in the three-component mixture and the reaction-accelerating component in this mixture can consist of a commercially available component. It is particularly preferred to use a sulfonated polycondensation product based on melamine or the like which optimally fulfills the special requirements given in the use case according to the invention.
- thermosetting binder contained in the water-binder mixture consists of the same binder that is already contained in the fleece, so that only a single type of binder is present across the plate, with a hardener introduced both with the one previously in the fleece already contained as well as can react with the subsequently applied binder.
- a plate designed according to the invention consists of a uniformly formed and pressed under the influence of heat fleece, which only has a selectively higher binder content in one or both outer layers.
- the plate can be made from several non-woven layers.
- the outer layer (s) and the subsequent inner layer (s) are each assigned to one and the same fleece layer.
- the invention can also be carried out in such a way that when the nonwoven is produced, the binder content is reduced to such an extent that the cohesion of the plate produced is subsequently guaranteed, but the flexural strength of such a plate would not be sufficient for practical use.
- the proportion of binder in the surface area can be increased so that overall a significantly improved flexural strength of the plate is achieved.
- the further advantage provided by this is that the average binder content of the board is significantly reduced without loss of strength. This is of considerable economic importance.
- the surface of an endless conveyor belt 11 forming a transport surface is sprayed with a water-binder mixture 20 by means of a nozzle 16 connected to a storage vessel 21.
- a nozzle 16 connected to a storage vessel 21.
- this spraying of the conveyor belt is not necessary.
- the nozzle 16 is followed by a feed device 17 for fine particles 18, for example containing 5% binder, e.g. Shredded wood chips are provided, which are deposited from above as a fleece 15 onto the transport surface 11 moistened with the water-binder mixture 20.
- a further spray nozzle 19 is provided, which is connected to the same storage container 21 as the spray nozzle 16 which may be provided and which converts the water-binder mixture into a fog form and thus wets the nonwoven surface immediately before the press inlet.
- the distance between the nozzle 19 and the press inlet is minimized, so that the time which elapses between the misting of the water-binder mixture on the fleece and the start of pressing in the heated press is very short.
- the feed device 17 must also extend over the entire width of the transport surface 11, so that a uniformly thick fleece 15 is deposited on the transport surface 11 over the entire width.
- the spray nozzles 16, 19 do not have to spray vertically from above onto the transport surface 11 or the fleece 15, but can also be inclined at an angle of up to 60 ° to the vertical.
- the fleece 15 thus wetted up and down with the water-binder mixture is introduced into a double belt press 22 and, with heating, pressed therein to a plate 14 which, viewed in the direction of transport, emerges from the rear end of the double belt press 22 and rests on a flat base 23 .
- the plate 14 has the structure shown in FIG. 2.
- a middle layer 24 with a bulk density of 650 kg / m3 and a binder content, e.g. Urea resin, of 5% there are thin outer layers 25, 26 in which there is an increased binder content of, for example, 7.5% due to the spraying on of the water-binder mixture 20. Due to the stronger compression caused by the water content, the bulk density there is about 850 kg / m3.
- a binder content e.g. Urea resin
- the outer layers 25, 26 have a thickness of 0.4 mm, for example.
- the spray nozzles 16, 19 can work with or without compressed air and should in any case ensure that the water-binder mixture is dissolved in a fine droplet of mist.
- the transition from the lower binder concentration in the middle layer 24 to the higher concentration in the Outer layers 25, 26 are not abrupt, but rather flowing or continuous, so that the formation of boundary layers which impair strength is avoided.
- thermosetting binders for example, urea resins, urea-melamine resins or mixtures thereof can be used as thermosetting binders.
- An alternative binder mixture which can also be used in the context of the invention, consists of water, a paraffin emulsion and a release agent, and good results are achieved if the ratio by weight percentages is approximately 90: 9: 1.
- Commercially available paraffin emulsions and release agents can be used.
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)
- Compositions Of Oxide Ceramics (AREA)
- Press Drives And Press Lines (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4142438A DE4142438A1 (de) | 1991-12-20 | 1991-12-20 | Platte und verfahren zu deren herstellung |
DE4142438 | 1991-12-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0548758A1 true EP0548758A1 (fr) | 1993-06-30 |
EP0548758B1 EP0548758B1 (fr) | 1996-05-01 |
Family
ID=6447791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92121335A Expired - Lifetime EP0548758B1 (fr) | 1991-12-20 | 1992-12-15 | Panneau et procédé pour sa fabrication |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0548758B1 (fr) |
AT (1) | ATE137435T1 (fr) |
DE (2) | DE4142438A1 (fr) |
DK (1) | DK0548758T3 (fr) |
ES (1) | ES2086629T3 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4425472C1 (de) * | 1994-07-19 | 1996-01-18 | Heraklith Baustoffe Ag | Dämmatte und Verfahren zur Herstellung einer Dämmatte |
EP0749814A1 (fr) * | 1995-06-23 | 1996-12-27 | Giuseppe Locati | Matière composite avec une structure en treillis et procédé de production |
EP2388117A1 (fr) * | 2010-05-17 | 2011-11-23 | Flooring Technologies Ltd. | Procédé et installation de fabrication d'une plaque en fibres de bois |
WO2013131528A1 (fr) | 2012-03-06 | 2013-09-12 | Homatherm Ag | Procédé de fabrication d'un panneau de matériau dérivé du bois |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4438764A1 (de) * | 1994-10-29 | 1996-05-02 | Hp Chemie Pelzer Res & Dev | Verbundwerkstoff für die Automobilindustrie |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB960923A (en) * | 1960-12-30 | 1964-06-17 | Otk N Puu Osakeyhtioe | Chip-board manufacture |
DE2421284A1 (de) * | 1974-05-02 | 1975-11-13 | Baehre & Greten | Verfahren und vorrichtung zum beaufschlagen der oberseite eines der herstellung von spanplatten o.dgl. dienenden vlieses mit einem fluessigkeitsnebel |
EP0008566A1 (fr) * | 1978-07-14 | 1980-03-05 | Ab Casco | Procédé pour appliquer un liquide sur une nappe de fibres de bois destinée à être pressée pour former des plaques et installation pour la mise en oeuvre de ce procédé |
EP0371371A2 (fr) * | 1988-11-30 | 1990-06-06 | Glunz Ag | Procédé pour obtenir une couche décorative, notamment une structure imitant le bois, sur la surface d'une plaque en fibres durcie |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH272043A (de) * | 1949-01-19 | 1950-11-30 | Moebelfabrik Horgen Glarus Ag | Verfahren zur Herstellung von gegen physikalische und chemische Einwirkungen weitgehend unempfindlichen Oberflächen an Gegenständen aus Holz und Vorrichtung zur Durchführung des Verfahrens. |
CH377530A (de) * | 1955-11-17 | 1964-05-15 | Helmut Friedrich Elmar | Form- oder Pressteil aus porösem, vorzugsweise faserigem Werkstoff |
SU375202A1 (ru) * | 1967-04-04 | 1973-03-23 | Способ изготовления изделий из древесной пресс-крошки | |
SU421531A1 (ru) * | 1972-08-30 | 1974-03-30 | А. Е. Анохин, А. Н. Боков, А. Г. Забродкин , Н. Н. Костин | Способ изготовления древесностружечных плит |
SU442942A1 (ru) * | 1973-03-07 | 1974-09-15 | Ленинградская Ордена Ленина Лесотехническая Академия Имени С.М. Кирова | Способ изготовлени древевесноволокнистых плит |
DE2536537A1 (de) * | 1975-08-16 | 1977-02-24 | Siempelkamp Gmbh & Co | Verfahren zur herstellung von ohne weiteres mit einer farbschicht oder lackschicht ausruestbaren spanplatten und faserplatten |
US4175148A (en) * | 1976-11-05 | 1979-11-20 | Masonite Corporation | Product containing high density skins on a low density core and method of manufacturing same |
DE2718736C3 (de) * | 1977-04-27 | 1981-01-22 | Lignotock Verfahrenstechnik Gmbh, 1000 Berlin | Fasermatte zur trockenen Herstellung von gepreßten Formkörpern |
US4238438A (en) * | 1979-02-01 | 1980-12-09 | Champion International Corporation | Hardboard with smooth, dense surface and method |
SU973396A1 (ru) * | 1981-05-22 | 1982-11-15 | Всесоюзный Научно-Исследовательский Институт Деревообрабатывающей Промышленности Всесоюзного Научно-Производственного Объединения По Производству Древесных Плит И Стандартных Деревянных Домов "Союзнаучплитпром" | Способ изготовлени древесноволокнистых плит |
GB8530781D0 (en) * | 1985-12-13 | 1986-01-22 | Evode Ltd | Manufacture of boards |
DE3602381A1 (de) * | 1986-01-28 | 1987-07-30 | Guenter Ikemann | Verfahren zur herstellung von platten- oder blockfoermigen bauelementen aus bei der getreideernte anfallenden strohmaterialien |
DD277475A1 (de) * | 1988-11-29 | 1990-04-04 | Wissensch Techn Zentrum Der Ho | Verfahren zum entfernen von anhaftungen an heizplatten und beilagen von heisspressen |
DD288566A5 (de) * | 1989-10-24 | 1991-04-04 | Wtz Der Holzverarbeiten Industrie,De | Verfahren zur herstellung eines im pressblanken zustand verarbeitbaren holzpartikelwerkstoffes |
US5002713A (en) * | 1989-12-22 | 1991-03-26 | Board Of Control Of Michigan Technological University | Method for compression molding articles from lignocellulosic materials |
-
1991
- 1991-12-20 DE DE4142438A patent/DE4142438A1/de not_active Withdrawn
-
1992
- 1992-12-15 AT AT92121335T patent/ATE137435T1/de not_active IP Right Cessation
- 1992-12-15 DE DE59206180T patent/DE59206180D1/de not_active Expired - Fee Related
- 1992-12-15 EP EP92121335A patent/EP0548758B1/fr not_active Expired - Lifetime
- 1992-12-15 ES ES92121335T patent/ES2086629T3/es not_active Expired - Lifetime
- 1992-12-15 DK DK92121335.1T patent/DK0548758T3/da active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB960923A (en) * | 1960-12-30 | 1964-06-17 | Otk N Puu Osakeyhtioe | Chip-board manufacture |
DE2421284A1 (de) * | 1974-05-02 | 1975-11-13 | Baehre & Greten | Verfahren und vorrichtung zum beaufschlagen der oberseite eines der herstellung von spanplatten o.dgl. dienenden vlieses mit einem fluessigkeitsnebel |
EP0008566A1 (fr) * | 1978-07-14 | 1980-03-05 | Ab Casco | Procédé pour appliquer un liquide sur une nappe de fibres de bois destinée à être pressée pour former des plaques et installation pour la mise en oeuvre de ce procédé |
EP0371371A2 (fr) * | 1988-11-30 | 1990-06-06 | Glunz Ag | Procédé pour obtenir une couche décorative, notamment une structure imitant le bois, sur la surface d'une plaque en fibres durcie |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 010, no. 044 (M-455)21. Februar 1986 & JP-A-60 196 304 ( KEMIKOOTO KK ) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4425472C1 (de) * | 1994-07-19 | 1996-01-18 | Heraklith Baustoffe Ag | Dämmatte und Verfahren zur Herstellung einer Dämmatte |
DE4425472C2 (de) * | 1994-07-19 | 2000-07-13 | Oesterr Heraklith Gmbh | Dämmatte und Verfahren zur Herstellung einer Dämmatte |
EP0749814A1 (fr) * | 1995-06-23 | 1996-12-27 | Giuseppe Locati | Matière composite avec une structure en treillis et procédé de production |
EP2388117A1 (fr) * | 2010-05-17 | 2011-11-23 | Flooring Technologies Ltd. | Procédé et installation de fabrication d'une plaque en fibres de bois |
WO2013131528A1 (fr) | 2012-03-06 | 2013-09-12 | Homatherm Ag | Procédé de fabrication d'un panneau de matériau dérivé du bois |
Also Published As
Publication number | Publication date |
---|---|
EP0548758B1 (fr) | 1996-05-01 |
ES2086629T3 (es) | 1996-07-01 |
DE4142438A1 (de) | 1993-06-24 |
DK0548758T3 (da) | 1996-06-03 |
DE59206180D1 (de) | 1996-06-05 |
ATE137435T1 (de) | 1996-05-15 |
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