EP3368841B1 - Procédé de fabrication d'une plaque diffusante en liège, paroi diffusante en liège et conteneur isotherme comprenant une telle paroi - Google Patents

Procédé de fabrication d'une plaque diffusante en liège, paroi diffusante en liège et conteneur isotherme comprenant une telle paroi Download PDF

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Publication number
EP3368841B1
EP3368841B1 EP16791329.2A EP16791329A EP3368841B1 EP 3368841 B1 EP3368841 B1 EP 3368841B1 EP 16791329 A EP16791329 A EP 16791329A EP 3368841 B1 EP3368841 B1 EP 3368841B1
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EP
European Patent Office
Prior art keywords
cork
container
plate
sheet
diffusing
Prior art date
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Active
Application number
EP16791329.2A
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German (de)
English (en)
French (fr)
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EP3368841A1 (fr
Inventor
Alexandre NARINX
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.)
Corkconcept SA
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
    • B27J5/00—Mechanical working of cork
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/02—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by compressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3813—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3813—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container
    • B65D81/3818—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container formed with double walls, i.e. hollow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/02—Devices using other cold materials; Devices using cold-storage bodies using ice, e.g. ice-boxes
    • F25D3/06—Movable containers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2303/00—Details of devices using other cold materials; Details of devices using cold-storage bodies
    • F25D2303/08—Devices using cold storage material, i.e. ice or other freezable liquid
    • F25D2303/083—Devices using cold storage material, i.e. ice or other freezable liquid using cold storage material disposed in closed wall forming part of a container for products to be cooled

Definitions

  • the invention relates to a method of manufacturing a cork diffusing plate for an insulated container, to a cork diffusing plate and to an insulated container comprising such a plate for containing pharmaceuticals, foodstuffs or any other type of object. asking to be transported at a controlled temperature.
  • insulated containers are currently known.
  • the insulated containers allow their contents to be kept at a certain desired temperature, in order to keep them at a controlled temperature during their transport or storage.
  • the document US 2002/0050147 discloses an insulated container comprising a double plastic wall inside which are placed heating or cooling elements.
  • This double wall comprising the heating or cooling elements defines a volume which is used as a container.
  • the container will be kept at a certain temperature depending on the content. Thanks to this type of container, the objects are not in direct contact with the heating or cooling elements.
  • the internal walls of the double wall are made of plastic and are less insulating than the external walls, so that the heat flux is transmitted to the container, and not to the outside.
  • the problem is that the temperature of the cooling or heating elements is transmitted quickly to the container through the plastic walls, this can create a thermal shock for the objects contained. This thermal shock is a problem for foods for example, for which sudden temperature change is not recommended.
  • the cooling elements transmit their temperature to the container and heat up, condensation is created and moisture is found on the plastic walls.
  • the document CH 147246 A discloses a thermally insulating container whose walls are made using several layers of cork, with air spaces between the layers of cork filled with raw granules of cork.
  • An object of the invention is first to provide a method of manufacturing a diffusing plate for an insulated container, making it possible to avoid thermal shocks by ensuring a spread over time of the temperature through this plate.
  • the invention relates to a method of manufacturing a cork diffusing plate for an insulated container. Considering a starting cork plate of initial density, it is compressed to laterally increase the density, form crusted outer skins with a diffusion greater than that initial and thus control the diffusion of the compressed plate.
  • a cork diffusing plate is obtained with its outer skins of higher density than the internal part, which gives a diffusing property to the external surfaces and an insulating property to the internal part of the plate.
  • This conformation of the plate therefore makes it possible to have diffusing and insulating power at the same time, thanks to the diffusing power of external crusts and to the insulating power of the internal alveolar part.
  • the result obtained is that the plate thus produced offers a control of the diffusion of the temperature through it.
  • the external crusts provide rigidity to the plate, which allows it to be machined precisely, and assembled to hold it in the container. This rigidity provided by the crusts is essential, otherwise the plates should be much thicker and the useful volume of the container would be greatly reduced.
  • the invention further relates to a cork diffusing plate for an insulated container produced according to the manufacturing method of the invention.
  • the invention also proposes a type of insulated container comprising walls, said walls comprising an external cork plate and an internal cork plate, with an intermediate space arranged to receive a thermal source, the walls being arranged to receive content, characterized in that said internal plate is a cork diffusing plate produced according to said manufacturing process.
  • the internal plate of the wall is the diffusing plate of the invention, compressed so as to have a particular structure having a higher density of its external surfaces.
  • This internal wall thus improved makes it possible to diffuse over time the temperature from the thermal source to the volume capable of receiving content which must be kept at a certain temperature.
  • the heat source can of course be a cold source or hot.
  • the temperature spreads more or less quickly. This results in being able to manage the broadcasting time, depending for example on the transport time of the content to be kept under controlled temperature.
  • the temperature is controlled thanks to this diffusing plate.
  • the outer plate has a lower density than the inner plate, in order to force the heat flow to go towards the volume intended to receive the content, and not towards the outside of the container.
  • the difference in density between the external and internal plate coupled to the multi-density system of the internal plate makes it possible to optimize the desired effect.
  • Another advantage is that the thermal shocks experienced by the containers of the prior art are avoided.
  • the temperature will diffuse slowly through this internal plate, so as not to suddenly change the temperature of the volume intended to receive the content.
  • the distribution of cold or hot is controlled in advance thanks to the thickness of the compressed cork underlayments of the internal plate.
  • cork is a moisture-absorbing material.
  • the condensation will be absorbed by the outer plate.
  • the outer plate is less dense than the inner plate, which promotes the absorption of moisture by this outer plate.
  • the dense crust of the inner wall also promotes this absorption of moisture by this outer plate, because this crust acts as a barrier to moisture.
  • the central part of the internal plate of the wall makes it possible to store cold or hot, which must pass through the two external crusts.
  • the internal plate will therefore charge in order to become itself a reserve of hot or cold. We can therefore keep hot or cold more stable if the container is opened for a brief manipulation.
  • the internal plate loading uniformly over its height and width is then assimilated to an element allowing a perfectly homogeneous diffusion of the desired temperature and not a point source.
  • a starting cork plate has been compressed on the surface to a determined thickness, and so as to have a density varying on the section of the plate 1.
  • the density within said plate 1 is higher on the external surfaces 2 than in the internal part 3 of said plate 1 to allow control of the diffusion of the temperature through said plate.
  • said starting cork plate is here compressed over its entire surface.
  • the external surfaces 2 are assimilated to dense crusts, having a density between 0.6 to 0.85, while the internal part 3 of the diffusing wall 1 has a honeycomb structure with a density between 0.15 and 0.45.
  • the cellular inner part 3 therefore has a higher insulating power than the outer crusts 2.
  • This conformation of plate 1 makes it possible to have a diffusing and insulating power at the same time, thanks to the diffusing power of the outer crusts 2 and the insulating power of the internal alveolar part 3.
  • a determined proportion between the thicknesses of the dense external crusts 2 and the internal alveolar part 3 must be obtained. It is the same for the ratio between the densities of these two parts.
  • the proportion of internal alveolar part 3 must not be too high, at the risk that the plate 1 is too insulating and that the temperature diffusion through it is too slowly.
  • the proportion of external crusts 2 must not be too high either, at the risk that the plate 1 is not sufficiently insulating and that the temperature diffusion through it takes place too quickly.
  • the dense external crusts 2 also provide adequate rigidity to the plate in order to give it its retention in the container 4.
  • the cork plate 1 must have a low density. The problem which arises is that the plate 1 is then too flexible and does not maintain itself correctly.
  • Two solutions can be envisaged. A first solution would be to increase the thickness of the plate 1, which would decrease the useful volume of the container 4, which is a capital element to be optimized in the field of transport. The second solution would be to increase the density of the plate 1 so that it maintains itself, but the insulation would be reduced and there would be a risk of thermal shock. In order to achieve the same insulation with sufficient density to hold the plate 1, the thickness of this plate 1 must be increased and therefore the useful volume of the container 4 must be reduced.
  • the insulated container 4 of the figure 2 seen from above, uses internal diffusing plates 1 in compressed cork.
  • the insulated container 4 includes walls around a volume 5 capable of receiving the content to keep at a certain temperature.
  • the container 4 is characterized in that each wall comprises an external cork plate 6, a space 7 which can contain, and here containing, at least one thermal source 8 and an internal plate 1 produced by compression of cork.
  • Said internal plate 1 separates the heat source 8 from the content located in the volume 5.
  • said internal plate 1 has the density of its external surfaces 2 higher than that of its internal part 3 in order to diffuse the temperature as desired.
  • the geometry of the internal plate 1 will affect the speed of transmission of the temperature from the thermal sources 8 to the volume 5 capable of receiving the content which must be maintained at a certain temperature.
  • the temperature spreads more or less quickly. This makes it possible to manage the broadcasting time, depending for example on the transport time of the content to be kept under controlled temperature.
  • the external plate 6 has a lower density than the internal plate 1 in order to force the heat flow to go towards the volume 5, and not towards the outside of the container 4.
  • the insulated container 4 the walls of which form an isothermal primary space 5 can be placed in an external packaging with secondary space 11 for securing and protecting the isothermal primary space 5.
  • the container is in some cases placed in a package, which allows it to have a cover 10 and a bottom 9.
  • This packaging which can be made of cardboard for example, is practical for transport. Packaging is a means of solidarity and protection. But in most cases, the container itself already includes a bottom and a lid. The packaging then only adds an additional cover 10 and bottom 9 to the container 4.
  • Space 7 can contain a thermal source, but in some cases it can be dispensed with.
  • the container of the invention can be used simply by using the fact that the external walls, during transport or storage, allow the external temperature to gradually pass, the external walls regulating the passage of this temperature.
  • the insulated container 4 has the shape of a rectangular parallelepiped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Packages (AREA)
  • Table Devices Or Equipment (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Finishing Walls (AREA)
EP16791329.2A 2015-10-29 2016-10-18 Procédé de fabrication d'une plaque diffusante en liège, paroi diffusante en liège et conteneur isotherme comprenant une telle paroi Active EP3368841B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2015/5702A BE1023232B1 (fr) 2015-10-29 2015-10-29 Procédé de fabrication d'une plaque diffusante en liège, paroi diffusante en liège et conteneur isotherme comprenant une telle paroi.
PCT/EP2016/075000 WO2017071994A1 (fr) 2015-10-29 2016-10-18 Procédé de fabrication d'une plaque diffusante en liège, paroi diffusante en liège et conteneur isotherme comprenant une telle paroi

Publications (2)

Publication Number Publication Date
EP3368841A1 EP3368841A1 (fr) 2018-09-05
EP3368841B1 true EP3368841B1 (fr) 2020-05-13

Family

ID=54979344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16791329.2A Active EP3368841B1 (fr) 2015-10-29 2016-10-18 Procédé de fabrication d'une plaque diffusante en liège, paroi diffusante en liège et conteneur isotherme comprenant une telle paroi

Country Status (9)

Country Link
US (1) US20180311862A1 (es)
EP (1) EP3368841B1 (es)
CN (1) CN108351159A (es)
BE (1) BE1023232B1 (es)
ES (1) ES2810702T3 (es)
MA (1) MA42346B1 (es)
PT (1) PT3368841T (es)
TN (1) TN2018000136A1 (es)
WO (1) WO2017071994A1 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113911499A (zh) * 2021-10-14 2022-01-11 高邮市恒升彩印包装有限公司 一种冷链运输用防水纸箱

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB185540A (en) * 1921-06-18 1922-09-14 John Davies Improvements in and relating to insulation, specially applicable to insulation for cold storage chambers or the like on land or ship board
US1686072A (en) * 1926-03-31 1928-10-02 Jens C Christensen Refrigerator
CH147246A (de) * 1930-04-11 1931-05-31 Schlittler Tschudi E Lager- und Transportbehälter für zu kühlendes Gut.
US2339458A (en) * 1940-08-02 1944-01-18 Mitchell & Smith Inc Method of making cork insulation
JPH09309575A (ja) * 1996-05-22 1997-12-02 Sekisui Plastics Co Ltd 保温容器
DE20018635U1 (de) 2000-10-31 2001-03-01 Dade Behring Marburg GmbH, 35041 Marburg Isolierbehälter
JP2004075188A (ja) * 2002-08-20 2004-03-11 Yasuda:Kk 保温、保冷の蓄熱源用断熱二重容器
JP2009092222A (ja) * 2007-10-12 2009-04-30 Kyushu Univ 真空断熱パネルと保温箱
CN102107447B (zh) * 2009-12-26 2013-07-24 浙江世友木业有限公司 一种木质型材及其制备方法
US8567211B2 (en) * 2010-02-17 2013-10-29 Hafeth A. Al-Rasheed Portable hygenic ice chest for medical supplies or the like
CN103174913B (zh) * 2011-12-22 2015-02-25 福建赛特新材股份有限公司 矩形真空绝热结构板组装的保温箱
CN203898115U (zh) * 2013-07-30 2014-10-29 熊一兵 内置反光层的真空保温隔热装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20180311862A1 (en) 2018-11-01
PT3368841T (pt) 2020-08-26
MA42346A1 (fr) 2018-10-31
WO2017071994A1 (fr) 2017-05-04
MA42346B1 (fr) 2019-05-31
BE1023232B1 (fr) 2017-01-05
EP3368841A1 (fr) 2018-09-05
TN2018000136A1 (en) 2019-10-04
ES2810702T3 (es) 2021-03-09
CN108351159A (zh) 2018-07-31

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