WO1993017845A1 - Procede de fabrication d'un corps en resine synthetique façonne par compression - Google Patents

Procede de fabrication d'un corps en resine synthetique façonne par compression Download PDF

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Publication number
WO1993017845A1
WO1993017845A1 PCT/AT1993/000037 AT9300037W WO9317845A1 WO 1993017845 A1 WO1993017845 A1 WO 1993017845A1 AT 9300037 W AT9300037 W AT 9300037W WO 9317845 A1 WO9317845 A1 WO 9317845A1
Authority
WO
WIPO (PCT)
Prior art keywords
binder
impregnation step
fiber materials
resin
flame retardant
Prior art date
Application number
PCT/AT1993/000037
Other languages
German (de)
English (en)
Inventor
Fritz Haunold
Original Assignee
ISOVOLTA Österreichische Isolierstoffwerke Aktiengesellschaft
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3489968&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1993017845(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ISOVOLTA Österreichische Isolierstoffwerke Aktiengesellschaft filed Critical ISOVOLTA Österreichische Isolierstoffwerke Aktiengesellschaft
Priority to AT93905069T priority Critical patent/ATE127065T1/de
Priority to EP93905069A priority patent/EP0585428B1/fr
Priority to DE59300533T priority patent/DE59300533D1/de
Priority to AU36202/93A priority patent/AU3620293A/en
Publication of WO1993017845A1 publication Critical patent/WO1993017845A1/fr

Links

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
    • B27N3/06—Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation

Definitions

  • the invention relates to a process for the production of a synthetic resin compression molding, in which in an impregnation step 5 fiber materials, such as wood fibers in the form of a bed, are applied to a conveyor belt for the continuous production of a pre-compact or a raw plate and then, if appropriate, separating papers on both sides with a Binders consisting of a condensation resin or resin mixture based on phenols and / or amino compounds and aldehyde such as formaldehyde have been coated, and in which the layer structure thus formed continuously to an average weight per unit area in the range between 900 and 1200 kg / m 3
  • Fiber material leads to a porous laminate
  • the invention is based on the object of specifying a method of the type described at the outset which brings about a laminate with improved performance properties with regard to water resistance and flame resistance.
  • a method of the type described at the outset which is characterized in that the loose fiber materials are intimately mixed with the binder in a pre-impregnation step, for example in the blowline 3, the surface of the loose fiber materials being regularly included the binder is coated, and that these pre-impregnated fiber materials are then dried in a hot air stream 6 to a residual moisture of at most 6% and that these dried, pre-impregnated fiber materials are then used in the impregnation step.
  • a solid, water-insoluble flame retardant which is dispersed in the binder can be added to the binder and this flame retardant consists essentially of a water-insoluble nitrogen compound or of a water-insoluble nitrogen-phosphorus compound and borate are added to this flame retardant, the amount of flame retardant applied being 5-20% by weight, based on the dry fiber material.
  • the object of the invention is further achieved in that additional fiber materials in loose form and / or in the form of fabrics, scrims, mats, nonwovens or the like are added for the impregnation step and the additionally added fiber materials consist of glass fibers, synthetic fibers or natural fibers .
  • Another advantage of the process according to the invention is that a condensation resin or resin mixture in liquid form is used as the binder, which has a solid resin content of more than 80% by weight and a water content of at most 8% by weight, preferably at most 6 % By weight, the resin application in the pre-impregnation step being between 10 and 15% solid resin based on the dry fiber material.
  • FIGS. 1 a and 1 b The method according to the invention is explained in more detail with reference to FIGS. 1 a and 1 b, the pre-impregnation step being shown in FIG. 1 a and the impregnation step in FIG. 1 b, and an exemplary embodiment.
  • wood chips are softened with steam at approx. 170 ° C. and in
  • Refiner 1 chopped into wood fibers at a pressure of approx. 4 - 5 bar. These are discharged continuously via the blow valve 2 from the refiner into the blowline 3 under a high pressure drop, as a result of which a turbulent flow is generated.
  • a binder for example a phenolic resin with a low degree of condensation and consequently a relatively low viscosity, in which a solid flame retardant is dispersed, is introduced into the blowline 3 at a point 5 via a pipeline 4.
  • a water-insoluble ammonium polyphosphate can be used as the flame retardant.
  • the wood fibers in the pre-impregnation step are coated with the binder provided with flame retardant up to an order of 15% based on dry substance.
  • the free-floating fibers are wetted uniformly on their surface by the binder and, on the other hand, the particles of the flame retardant are glued to the fibers, so that a uniform distribution of the flame retardant is retained during further processing of these pre-impregnated fibers.
  • These pre-impregnated fibers are then introduced into the dryer tube 6, which is fed with hot air by a hot air blower 7, and dried to a moisture content of, for example, 4%.
  • the fibers thus dried are then introduced into a fiber bunker 9 via a cyclone 8 and can be stored there until the impregnation cut.
  • the pre-impregnated wood fibers in the form of a fiber bed 10 are applied to a conveyor belt 12 from the scattering station 11.
  • Unimpregnated fibers of other types, such as glass fibers, can be added to the pre-impregnated fibers.
  • the basis weight of the fiber fill is continuously checked by means of a balance 13.
  • the fiber bed 10 is then pre-compressed in a pre-press 14, 14 '.
  • Release papers 15, 15 ' are drawn off from the supply rolls 16 and coated on one side with the highly viscous, water-free binder via the coating system 17, 17'.
  • the basis weight is checked with a basis weight device 18, 18 *.
  • the structure thus formed then passes through a belt press 20 which is equipped with a heating zone 21 and a cooling zone 22.
  • the heating zone 21 the binder from the coatings of the release papers 25, 25 'penetrates into the fiber cake 19 from both sides. Since the fibers are evenly wetted with the binder from the pre-impregnation, the binder is distributed evenly in the spaces between the fibers. In order to prevent undesired curing of the binder, this composite is cooled in the cooling zone 22 to a temperature of at least 40 ° C.
  • the release papers are pulled off via the rollers 23, 23 ', the band-shaped composite is cut to length in the cutting device 24 and stacked. If the length of the cooling zone 22 is not sufficient for the desired cooling, a cooling star can be connected between the cutting device 24 and the stacking.
  • the method described in the figures for producing a preform which is used in the production of a plate-shaped high-pressure molded body can, with corresponding modifications, also be used directly for producing high-pressure molded bodies. be used. This is achieved, for example, by pressing pressure in the belt press 20 e.g. to 25 50 bar and the pressing temperature increased to 150 ° C and the dwell time of the layer structure e.g. extended to 10 minutes, so that the binder contained in the layer initially flows well and then hardens.
  • a raw plate is then removed from the belt press 20, the z. B. is cooled in a 30 downstream, cooled belt press to 30 ° C. The raw plate is then cut to length and decoratively painted for further use in a known manner.
  • Such decorative high-pressure molded articles of greater strength e.g.
  • 35 6 and 15 mm thick are suitable, for example, for the manufacture of self-supporting components or as weatherproof panels for outdoor use.

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)
  • Printing Methods (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Laminated Bodies (AREA)
  • Materials For Medical Uses (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

Procédé de fabrication d'un corps en résine synthétique façonné par compression, consistant (a) en une phase de préimprégnation et (b) en une phase d'imprégnation. Au cours de l'opération (a), des matériaux fibreux sont mélangés intimement, de manière regulière, avec un haut à base d'une résine de condensation dans la conduite de soufflage (3), puis lesdits matériaux sont séchés dans un courant d'air chaud (6), de manière que leur humidité résiduelle soit de 6 % maximum. Au cours de l'opération (b), les fibres de bois préimprégnées sont déposées en vrac (10) sur une bande transporteuse (12), et sont ensuite recouvertes des deux côtés avec des papiers de séparation (25, 25') qui sont eux-mêmes recouverts d'un côté, du liant réalisé à base de résine de condensation. La structure en couches (19) ainsi obtenue est comprimées de manière continue à une température plus élevée, pour atteindre une masse spécifique moyenne normale compris entre 900 et 1200 kg/m3, de manière à ce que le liant pénètre complétement à l'intérieur de la masse fibreuse où il est ensuite durci.
PCT/AT1993/000037 1992-03-04 1993-03-04 Procede de fabrication d'un corps en resine synthetique façonne par compression WO1993017845A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT93905069T ATE127065T1 (de) 1992-03-04 1993-03-04 Verfahren zur herstellung eines kunstharz- druckformkörpers.
EP93905069A EP0585428B1 (fr) 1992-03-04 1993-03-04 Procede de fabrication d'un corps en resine synthetique fa onne par compression
DE59300533T DE59300533D1 (de) 1992-03-04 1993-03-04 Verfahren zur herstellung eines kunstharz-druckformkörpers.
AU36202/93A AU3620293A (en) 1992-03-04 1993-03-04 Process for producing pressure formed synthetic resin bodies

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0041392A AT397805B (de) 1992-03-04 1992-03-04 Verfahren zur herstellung eines kunstharz-druckformkörpers
ATA413/92 1992-03-04

Publications (1)

Publication Number Publication Date
WO1993017845A1 true WO1993017845A1 (fr) 1993-09-16

Family

ID=3489968

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1993/000037 WO1993017845A1 (fr) 1992-03-04 1993-03-04 Procede de fabrication d'un corps en resine synthetique façonne par compression

Country Status (5)

Country Link
EP (1) EP0585428B1 (fr)
AT (2) AT397805B (fr)
AU (1) AU3620293A (fr)
DE (1) DE59300533D1 (fr)
WO (1) WO1993017845A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745463A2 (fr) * 1995-06-02 1996-12-04 Medite Corporation Procédé et dispositif de réduction des obstructions des conduites de transport pneumatique dans la fabrication de composites de cellulose
DE19746383A1 (de) * 1997-10-21 1999-04-22 Hofa Homann Gmbh & Co Kg Verfahren und Vorrichtung zur Herstellung von Faserplatten sowie nach dem Verfahren hergestellte Faserplatten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102744762B (zh) * 2012-07-19 2017-11-28 昆山吉美川纤维科技有限公司 纤维板生产用烘箱

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990013403A1 (fr) * 1989-05-03 1990-11-15 ISOVOLTA Österreichische Isolierstoffwerke Aktiengesellschaft Procede de fabrication d'un produit moule sous pression en resine synthetique, eventuellement en forme de plaque, et preforme a employer pour ce procede
US5093058A (en) * 1989-03-20 1992-03-03 Medite Corporation Apparatus and method of manufacturing synthetic boards

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1560817B1 (de) * 1965-07-28 1971-08-12 Gruenzweig & Hartmann Verfahren zur Herstellung insbesondere plattenf¦rmiger por¦ser Formk¦rper aus Glas- oder Mineralfasern u. dgl. sowie einem heisshärtbaren Bindemittel
AT338003B (de) * 1975-10-21 1977-07-25 Marischler Gerhard Dipl Ing Verfahren zur herstellung von holzspanwerkstoffen unter anwendung beschleunigt hartender phenolharzleime
SU1544570A1 (ru) * 1988-02-15 1990-02-23 Flomenblit Avram Устройство дл формовани волокнистых теплоизол ционных плит

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5093058A (en) * 1989-03-20 1992-03-03 Medite Corporation Apparatus and method of manufacturing synthetic boards
WO1990013403A1 (fr) * 1989-05-03 1990-11-15 ISOVOLTA Österreichische Isolierstoffwerke Aktiengesellschaft Procede de fabrication d'un produit moule sous pression en resine synthetique, eventuellement en forme de plaque, et preforme a employer pour ce procede

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745463A2 (fr) * 1995-06-02 1996-12-04 Medite Corporation Procédé et dispositif de réduction des obstructions des conduites de transport pneumatique dans la fabrication de composites de cellulose
EP0745463A3 (fr) * 1995-06-02 1997-04-16 Medite Corp Procédé et dispositif de réduction des obstructions des conduites de transport pneumatique dans la fabrication de composites de cellulose
DE19746383A1 (de) * 1997-10-21 1999-04-22 Hofa Homann Gmbh & Co Kg Verfahren und Vorrichtung zur Herstellung von Faserplatten sowie nach dem Verfahren hergestellte Faserplatten

Also Published As

Publication number Publication date
AU3620293A (en) 1993-10-05
EP0585428B1 (fr) 1995-08-30
ATA41392A (de) 1993-11-15
ATE127065T1 (de) 1995-09-15
AT397805B (de) 1994-07-25
EP0585428A1 (fr) 1994-03-09
DE59300533D1 (de) 1995-10-05

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