WO2008115086A1 - Processus de pré-expansion du liège par soumission à un rayonnement à micro-ondes et produit en résultant - Google Patents

Processus de pré-expansion du liège par soumission à un rayonnement à micro-ondes et produit en résultant Download PDF

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Publication number
WO2008115086A1
WO2008115086A1 PCT/PT2008/000012 PT2008000012W WO2008115086A1 WO 2008115086 A1 WO2008115086 A1 WO 2008115086A1 PT 2008000012 W PT2008000012 W PT 2008000012W WO 2008115086 A1 WO2008115086 A1 WO 2008115086A1
Authority
WO
WIPO (PCT)
Prior art keywords
cork
expansion
microwave radiation
submission
stage
Prior art date
Application number
PCT/PT2008/000012
Other languages
English (en)
Inventor
Helena Margarida Nunes Pereira
Rui Luis Gonçalves dos REIS
Susana Pinto Araújo da Silva Estima Martins
Antonio Jorge Velez Marques
Original Assignee
Amorim Cork Composites, S.A.
Amorim Isolamentos, S.A.
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 Amorim Cork Composites, S.A., Amorim Isolamentos, S.A. filed Critical Amorim Cork Composites, S.A.
Priority to AT08724036T priority Critical patent/ATE530310T1/de
Priority to ES08724036T priority patent/ES2376152T3/es
Priority to EP08724036A priority patent/EP2125310B1/fr
Publication of WO2008115086A1 publication Critical patent/WO2008115086A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K7/00—Chemical or physical treatment of cork
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
    • B27K5/0055—Radio-waves, e.g. microwaves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K2240/00—Purpose of the treatment
    • B27K2240/10—Extraction of components naturally occurring in wood, cork, straw, cane or reed

Definitions

  • This invention relates to a process, and to the resulting material, that allows the volumetric expansion of cork without using substances foreign to the cork system. More precisely, it relates to a process that consists in submitting cork to microwave radiation, obtaining a more bulky material and consequently increasing its yield and reducing its specific weight.
  • the European patent no. EP1677386 claims that wood, a material different from cork but also lignocellulosic, can be submitted to microwave radiations in order to destroy insects, parasites or their larvae.
  • the international patent no. WO03002923 describes the use of microwave radiation for fast wood drying, increasing additionally its permeability. In that case, the use of microwaves radiation is applied for wood cleaning, so its scope is not within the present application.
  • Microwave radiations are also used to cure polymers such as latex, as described in the Spanish patent no. ES2019514, or to cure resins for the production of wood derivatives, as described in the international patent no. WO9823132. Again, the scope of these inventions is different from the present application.
  • cork can be described as a homogeneous tissue of thin cells, without space between them, and an alveolar structure similar to a honeycomb.
  • the cork cells show diverse shapes depending if observed on the radial direction ( Figure 1) or in a perpendicular direction to radial, i.e., axial or tangential ( Figure 2) .
  • the closed structure of cork cells and the presence of air inside determine the low specific weight of cork, as well as some of its mechanical properties.
  • the specific weight of cork might however show a significant variability, between 120kg.rtf 3 and 240kg.irf 3 , as described by M.
  • volumetric increase in the three spatial directions
  • the volumetric increase in the three spatial directions
  • the present application describes a process capable of promoting cork expansion without using external substances to the cork system. Subsequently, the produced cork might be submitted to standard cork industrial processes.
  • This process can be used in continuous or non-continuous mode and has three stages, the first stage being the dosing of the material, followed by the expansion stage, and finally the discharge stage or preferably cooling and discharge.
  • the dosing stage intends to feed continuously and over time the expansion zone and can be done using a feeding endless screw or a conveyor.
  • the expansion stage should ensure the contact of the product to the action of the microwave radiation by a conveyor or dielectric containers such as for example, fibber glass, wood, plywood, among others.
  • the radiation power should range between 200 watt and 1000 watt, preferably between 400 watt and 800 watt.
  • the exposure time to the microwave radiation should be between 10 seconds and 5 minutes, preferably between 15 seconds and 2 minutes or even more preferably between 15 seconds and 50 seconds.
  • the collecting stage could be performed using an endless screw that might have a sealant "lock", a manual or electropneumatic plate valve or a conveyor.
  • the samples should have a humidity higher than 5%, which can be achieved by immersion in water at temperature ranging between 25 0 C and 100 °C or by autoclave at temperatures between 100 °C and 150 °C.
  • the dosing stage aims to feed the microwave chamber and can be performed using a feeding endless screw that may have a dosing sealant "lock" or a manual or electropneumatic plate valve or a conveyor.
  • the cork expansion stage will occur inside a closed chamber made of a dielectric material such as, for example, glass fibber, wood, plywood, among others.
  • the radiation power should range between 200 watt and 1000 watt, preferably between 400 watt and 800 watt.
  • the exposure time to the microwave radiation should be between 10 seconds and 5 minutes, preferably between 15 seconds and 2 minutes or even more preferably between 15 seconds and 50 seconds.
  • the expansion stage by submission to microwave radiation can be performed in one or more cycles.
  • the product collecting stage in the non-continuous process for cork expansion by submission to microwave radiation can be performed using an endless screw that may have a sealant "lock” or a manual or electropneumatic plate valve or a conveyor. During the expansion, process by submission to microwave radiation the presence of moisture is crucial for the expansion to occur. Product resulting from the pre-expansion. process
  • the present application seeks to demonstrate the increase of the cork dimensions and consequently the decrease of its specific weight after submission to microwave radiation.
  • the cork can be submitted to this pre-expansion process independently of its shape, origin, quality or pre-treatments already performed, namely, falca cork, virgin or reproduction cork, cork planks, cork residues (resulting from stopper production or cork plank transformation) , grinded cork, granulated cork or cork powder, any of them boiled or not boiled.
  • the increase on cork dimensions after being submitted to microwave radiations with controlled moisture, has two effects: promotes a yield increase of the material, i.e., less material used for the same application; and promotes an increase of the material quality, due to the reduction in specific weight. These two aspects represent commercial benefit.
  • cork material such as falca cork, virgin or reproduction cork, cork planks, cork residues (resulting from stopper production or cork plank transformation) , grinded cork, granulated cork or cork powder, any of them boiled or not boiled, shows an increase on its dimensions between 40% and 85%, when submitted to a pre-expansion process by submission to microwave radiation such as above described. This fact implies the reduction of its specific weight. It should be emphasized that in addition to the increase on the material yield (higher volume of cork after the treatment) , the cork with lower specific weight presents higher economical value.
  • Example 1 Cork expansion by submission to microwave radiation.
  • Cubic shaped cork samples were submitted to microwave radiation with 550 watt power. One group of samples was exposed for 25 seconds whereas another group was exposed to five cycles of 5 seconds each. The observed expansions were, respectively, 48% and 46%, emphasizing the importance of the exposure time and not the operation mode (continuous or several cycles) .
  • Example 2 Cork expansion with different humidity by submission to microwave radiation.
  • Cubic shaped cork samples were submitted to microwave radiation with 550 watt power. A group of samples with 1.4% of humidity presented, after treatment, a volumetric expansion of
  • Cubic shaped cork samples were submitted to microwave radiation, after immersion in water at different temperatures and for different time periods.
  • the results of the expansion and the detailed conditions are presented in Figure 3. Besides showing the microwave radiation effect on the volumetric increase of cork samples, expansion between 40% and 65%, these results allow to conclude that humidification by immersion in water is a possible method to be used, the immersion water temperature having a positive effect on the cork volumetric expansion.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Cette invention concerne un processus de pré-expansion par soumission à un rayonnement à micro-ondes, apte à promouvoir l'expansion du liège sans utiliser des substances étrangères au système en liège. L'expansion atteinte par ce processus de pré-expansion montre des valeurs qui peuvent se situer entre 40% et 85%. L'expansion du liège par ce processus de pré-expansion par soumission à un rayonnement à micro-ondes est atteinte dans le cas de n'importe quel matériau en liège, indépendamment de sa forme, origine, qualité ou prétraitements déjà effectués, à savoir, liège brut, liège de reproduction ou vierge, plateaux de liège, résidus de liège (résultant de la production de bouchons ou de la transformation de plateau de liège), liège broyé, liège granulé ou poudre de liège, bouilli ou non bouilli, résultant en un nouveau matériau de liège avec des propriétés améliorées. La présente invention présente également des modifications du nouveau matériau de liège particulièrement à travers l'augmentation volumétrique à la suite du traitement.
PCT/PT2008/000012 2007-03-21 2008-03-20 Processus de pré-expansion du liège par soumission à un rayonnement à micro-ondes et produit en résultant WO2008115086A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT08724036T ATE530310T1 (de) 2007-03-21 2008-03-20 Verfahren zur vorexpansion von kork durch bestrahlung mit mikrowellen
ES08724036T ES2376152T3 (es) 2007-03-21 2008-03-20 Proceso de preexpansión de corcho por sometimiento a radiación de microondas.
EP08724036A EP2125310B1 (fr) 2007-03-21 2008-03-20 Processus de pre-expansion du liege par soumission a un rayonnement a micro-ondes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PT103697A PT103697A (pt) 2007-03-21 2007-03-21 Processo de pré-expansão de cortiça por submissão a radiações microondas e produto resultante do mesmo
PT103697 2007-03-21

Publications (1)

Publication Number Publication Date
WO2008115086A1 true WO2008115086A1 (fr) 2008-09-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PT2008/000012 WO2008115086A1 (fr) 2007-03-21 2008-03-20 Processus de pré-expansion du liège par soumission à un rayonnement à micro-ondes et produit en résultant

Country Status (5)

Country Link
EP (1) EP2125310B1 (fr)
AT (1) ATE530310T1 (fr)
ES (1) ES2376152T3 (fr)
PT (2) PT103697A (fr)
WO (1) WO2008115086A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011054306B3 (de) * 2011-09-28 2012-10-04 Johann Brunner Verfahren zum Verschließen von Flaschen und Vorrichtung zum Bestrahlen von Korken in Flaschen
EP3051023A1 (fr) 2015-01-29 2016-08-03 Bayerische Motoren Werke Aktiengesellschaft Feuille contenant des particules de liege, cuir synthetique comprenant des particules de liege et son procede de fabrication
US20190084199A1 (en) * 2017-09-19 2019-03-21 Uchiyama Manufacturing Corp. Method for producing cork stopper and cork stopper

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037334A2 (fr) * 1998-01-22 1999-07-29 Rudolf Ohlinger Gmbh & Co. Kg Procede de traitement pour materiau en liege et bouchons de liege
WO2006021225A1 (fr) * 2004-08-24 2006-03-02 Hartwig Pollinger Procede et dispositif pour traiter des chenes-lieges

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037334A2 (fr) * 1998-01-22 1999-07-29 Rudolf Ohlinger Gmbh & Co. Kg Procede de traitement pour materiau en liege et bouchons de liege
WO2006021225A1 (fr) * 2004-08-24 2006-03-02 Hartwig Pollinger Procede et dispositif pour traiter des chenes-lieges

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SILVA S P ; SABINO M A ; FERNANDAS E M ; CORRELO V M ; BOESEL L F ; REIS R L: "Cork: Properties, capabilities and applications", INTERNATIONAL MATERIALS REVIEWS, vol. 50, no. 6, December 2005 (2005-12-01), pages 345 - 365, XP002482488 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011054306B3 (de) * 2011-09-28 2012-10-04 Johann Brunner Verfahren zum Verschließen von Flaschen und Vorrichtung zum Bestrahlen von Korken in Flaschen
EP2574591A2 (fr) 2011-09-28 2013-04-03 Johann Brunner Procédé de fermeture de bouteilles et dispositif destiné à irradier le liège dans les bouteilles
EP3051023A1 (fr) 2015-01-29 2016-08-03 Bayerische Motoren Werke Aktiengesellschaft Feuille contenant des particules de liege, cuir synthetique comprenant des particules de liege et son procede de fabrication
DE102015101333A1 (de) 2015-01-29 2016-08-04 Bayerische Motoren Werke Aktiengesellschaft Korkpartikelhaltige Folie, korkpartikelhaltiges Kunstleder und Verfahren zur Herstellung derselben
US20190084199A1 (en) * 2017-09-19 2019-03-21 Uchiyama Manufacturing Corp. Method for producing cork stopper and cork stopper
EP3459700A1 (fr) * 2017-09-19 2019-03-27 Uchiyama Manufacturing Corp. Procédé de production d'un bouchon de liège et bouchon de liège
JP2019055486A (ja) * 2017-09-19 2019-04-11 内山工業株式会社 コルク栓の製造方法及びコルク栓
US10703026B2 (en) 2017-09-19 2020-07-07 Uchiyama Manufacturing Corp. Method for producing cork stopper and cork stopper

Also Published As

Publication number Publication date
EP2125310B1 (fr) 2011-10-26
ES2376152T3 (es) 2012-03-09
ATE530310T1 (de) 2011-11-15
PT103697A (pt) 2008-09-30
PT2125310E (pt) 2011-11-21
EP2125310A1 (fr) 2009-12-02

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