EP2634306B1 - Membrane de protection et son procédé de fabrication. - Google Patents

Membrane de protection et son procédé de fabrication. Download PDF

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Publication number
EP2634306B1
EP2634306B1 EP12157383.6A EP12157383A EP2634306B1 EP 2634306 B1 EP2634306 B1 EP 2634306B1 EP 12157383 A EP12157383 A EP 12157383A EP 2634306 B1 EP2634306 B1 EP 2634306B1
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EP
European Patent Office
Prior art keywords
cork
membrane
particles
cork particles
protective membrane
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.)
Active
Application number
EP12157383.6A
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German (de)
English (en)
French (fr)
Other versions
EP2634306A1 (fr
Inventor
Caroline Martin
Hans Aerts
Eric Bertrand
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.)
Imperbel NV
Original Assignee
Imperbel NV
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 Imperbel NV filed Critical Imperbel NV
Priority to EP12157383.6A priority Critical patent/EP2634306B1/fr
Priority to DK12157383.6T priority patent/DK2634306T3/da
Priority to US13/778,239 priority patent/US9493942B2/en
Publication of EP2634306A1 publication Critical patent/EP2634306A1/fr
Application granted granted Critical
Publication of EP2634306B1 publication Critical patent/EP2634306B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N5/00—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch
    • D06N5/003—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch coated with bitumen
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/8409—Sound-absorbing elements sheet-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/12—Roof covering by making use of flexible material, e.g. supplied in roll form specially modified, e.g. perforated, with granulated surface, with attached pads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • Y10T428/24397—Carbohydrate

Definitions

  • the present invention relates to a protective membrane, in particular a soundproofing membrane or sound insulation based on mineral or vegetable bitumen, comprising a membrane body, a first and a second surface located on either side said membrane body, wherein the first surface comprises cork particles.
  • the present invention also relates to a method of manufacturing a protective membrane.
  • a sound insulation membrane comprising cork particles on the first surface.
  • the cork particles have a particle size greater than 5 mm. This soundproofing membrane is intended to be applied beneath a floor covering.
  • a disadvantage of such an insulation membrane is at its surface because it is rough.
  • this type of insulation membrane can not be used to protect the roof of a building for example and for several reasons.
  • the first surface of such a membrane is not smooth because it has surface irregularities. Indeed, the cork particles, which have a particle size greater than 5 mm, are apparent on the surface. Therefore, said particles may be torn off during bad weather, for example.
  • This insulation membrane is not durable or able to be used for a roof.
  • the cork particles have a particle size greater than 5 mm and this has the consequence that the surface coverage of said cork particles is insufficient.
  • the use of cork particles greater than 5 mm prevents training a protective membrane comprising a first surface uniformly covered and smooth. Note that if the bituminous binder is physically accessible, it may constitute a risk of ignition during a fire, for example. This type of membrane does not withstand fire enough, and is therefore not suitable for use on the roof.
  • the cork particles present on the first surface are likely to easily absorb water because of the porosity of the cork.
  • the absorption of water by said cork particles leads to the formation of microorganisms or algae on the surface of the insulation membrane.
  • a surface protection membrane when it is applied to building roofs, for example.
  • a membrane which has cork particles greater than 5 mm since these are apparent to the naked eye.
  • the object of the invention is to overcome the drawbacks of the state of the art by providing a protective membrane, in particular a waterproofing or soundproofing membrane, which resists the tearing of the cork particles during bad weather for example, which guarantees a sufficient resistance to fire and which is aesthetic.
  • a protective membrane in particular a waterproofing membrane or sound insulation, according to the invention comprising cork particles on the first surface is characterized in that said cork particles have a particle size included between 0.5 - 3 mm, preferably between 1 and 3 mm, and were thermotrazed with steam.
  • the selection of a granulometric range makes it possible to obtain a protective membrane whose first surface is uniformly covered with cork particles.
  • the choice of a granulometric range makes it possible in practice to use a particulate mixture capable of uniformly covering the first surface of the membrane. protection, when distributing cork particles.
  • the particulate mixture comprises particles of small and larger sizes in a size range of 0.5 to 3 mm, preferably 1 to 3 mm.
  • small cork particles fill in gaps created by the presence of larger sized particles. It is this particulate arrangement that leads to an even distribution of the cork particles on the first surface.
  • the protective membrane according to the invention is also resistant to fire because it is sufficiently covered with cork particles and it avoids the risk of tearing said particles to the surface in case of bad weather for example since the surface is smooth enough.
  • the steam thermoprocessing of the cork particles leads to the production of hydrophobic particles.
  • This treatment makes it possible to enlarge the hydrophobic pores of the cork particles so that it no longer absorbs through its hydrophilic pores.
  • the steam thermoprocessing which is used targets the intrinsic structure of the cork particles.
  • the distribution of the cork particles, which have been heat-treated with steam, on the first surface of the protective membrane, leads to the formation of a hydrophobic surface. Said treatment makes it possible to avoid the formation of microorganisms or algae on the surface.
  • cork particles having a particle size of between 0.5 and 3 mm, preferably 1 to 3 mm, and which have been heat-treated with steam is thus of great importance since the combination of these two elements leads to obtaining a durable, waterproof, fire-resistant and aesthetic protection membrane.
  • the protective membrane according to the invention is characterized in that the membrane body comprises cork particles which have a particle size of between 60 and 500 ⁇ m, preferably between 63 and 125 ⁇ m.
  • a mineral bituminous mass consists of approximately 60% of oil.
  • Oil is a constituent of the bituminous binder that is present in the protective membrane and contributes to the required viscosity in the membrane. It is therefore necessary to respect a viscosity range of the bituminous binder in order to contain the oil in the crystalline zone of the bitumen mass.
  • Cork absorbs oil because it is a porous material. It must therefore be avoided that the use of cork particles and their ability to absorb oil affects the viscosity of the protective membrane. Indeed, the use of cork particles having a particle size greater than 500 microns in the membrane body causes the appearance of large particles on the surface of the bituminous mixture and thus an oil migration to the surface.
  • these particles then constitute points of weakness in the structure of the bituminous binder. This significantly affects the quality of the final product and its durability.
  • the use of cork particles having a particle size less than 60 microns is also inadequate. Indeed, said cork particles, in the form of powder, do not distribute themselves correctly in the bituminous mass which lacks coherence. Also, said particles absorb the oil which should remain in the bitumen mass in order to avoid obtaining a pasty bituminous binder. As a result, the cork particles do not adhere sufficiently to the bitumen binder. However, the cork particles must sufficiently adhere to the bitumen mass in order to obtain a coherent bituminous binder in which the oil remains in the crystalline phase of said binder.
  • cork particles which have a particle size of less than 60 ⁇ m in the membrane body leads to a viscous product and therefore does not conform to the desired quality.
  • the cork particles have a particle size of between 60 and 500 ⁇ m, preferably between 63 and 125 ⁇ m, the aforementioned problems do not appear.
  • the particle size range chosen comprises cork particles which adhere sufficiently to the mass of bitumen without however absorb such an amount of oil that could make the bituminous binder viscous.
  • This embodiment which uses cork particles which have a particle size of between 60 and 500 ⁇ m, preferably between 63 and 125 ⁇ m, provides a lightened waterproofing membrane with respect to the mineral fillers normally used and does not affect the quality, durability and viscosity of said membrane.
  • a protective membrane according to the invention is characterized in that, on the second surface, cork particles are distributed which have a particle size of between 60 and 500 ⁇ m, preferably between 63 and 125 ⁇ m. .
  • the advantage of using said cork particles on the second surface is to provide a lighter protective membrane. Indeed, the cork particles replace the usual mineral layer, talc, to avoid sticking during the winding of the membrane.
  • the second surface may also be called the bottom surface.
  • the invention also relates to a method of manufacturing a protective membrane comprising a step in which an armature is impregnated with mineral or vegetable bitumen.
  • the manufacturing method according to the invention may also comprise a step in which the bitumen, mineral or vegetable, is mixed, prior to the impregnation of the reinforcement, with cork particles having a particle size of between 60 and 500 ⁇ m. preferably between 63-125 ⁇ m.
  • the process according to the invention also comprises a step which consists in distributing cork particles having a particle size distribution. between 60 - 500 ⁇ m, preferably 63 - 125 ⁇ m on the lower surface.
  • a known protective membrane comprises a membrane body, a first and a second surface located on either side of said membrane body.
  • the first surface may be called the upper surface and the second surface may be called the lower surface.
  • the membrane body comprises a mineral or vegetable bituminous binder.
  • a reinforcement for example, a glass and / or polyester web
  • the protective membrane is calendered in order to obtain a smooth product.
  • the product then obtained is uniform.
  • winding of the protective membrane it is in the form of a roller.
  • the first surface of a protective membrane comprises cork particles which have a particle size of between 0.5 and 3 mm, preferably between 1 and 3 mm. So, after impregnation of reinforcement 1 to bitumen 2 ( figure 1 ), for example, the cork particles, previously steam-treated with steam, are distributed on the first surface with the aid of a hopper 3 when the bitumen is still hot (180 ° C.). Finally, said membrane is preferably calendered twice in order to better adhere the cork particles to the surface of the membrane. Thanks to this calendering step, the cork particles adhere more to the upper surface of the membrane. The product obtained is then uniform, fire-resistant and durable.
  • the method of manufacturing a protective membrane involves a step of distributing the cork particles. For this is done using a hopper for example which is located above the protective membrane and the flow rate associated with the drop of the cork particles on the protective membrane is adjusted according to the speed of passage of the protective membrane. under the hopper.
  • thermoprocessing of cork particles can be carried out beforehand in the factory or at the place where the protective membrane is made.
  • Table 1 comprises the materials used according to the prior art during an upper surfacing (granules and slate flakes); and according to the invention the cork in two different forms namely cork 1-2 mm and cork heat-treated steam 0.5 - 3 mm.
  • Table 1 ⁇ / u> Slate granules Slate glitter Cork 1-2 mm
  • Steam heat treated cork 0.5 - 3 mm Unit Form granules flakes granules granules / Mass per m 2 1.6 1.2 0.3 0.4 kg / m 2 Blanket + ++ - + / calendering 1 1 1 2 RLX Passage Broof-T2 45 42 / 35 cm Passing to 3 mm 99 100 100 100 100 % To 2 mm 95 100 100 100 71 % Increasing to 1.25 mm 75 88 32 56 % Moving to 1 mm 54 68 5 47 % Passing 0.5 mm 35 2 0 15 %
  • Table 1 compares different parameters: shape, mass per m 2 , coverage, calendering, fire test such as broof-T2; and loops at 3 mm, 2 mm, 1.25 mm, 1 mm and 0.5 mm.
  • cork granules The shape of the cork granules is spherical and that of the slate flakes is flat. Cork granules have the same shape as slate granules.
  • the mass per m 2 (kg / m 2 ) is 1.6 kg / m 2 for slate granules, 1.2 kg / m 2 for slate flakes, 0.3 kg / m 2 for slate granules.
  • the cover represents the distribution of the cork particles on the protective membrane.
  • granules or slate flakes have, by their nature, a good particle size distribution.
  • cork requires the selection of a specific particle size range.
  • Table 1 compares the coverage of the upper surface of a protective membrane comprising cork particles between 1 - 2 mm and between 0.5 - 3 mm. It is found that the use of cork particles having a particle size of between 1 and 2 mm implies a lower quality coverage. Indeed, the range is then too restricted which does not lead to a mixture of sufficiently small and large particles at a time in order to obtain an even distribution on the upper surface. An enlarged particle size range must therefore be selected in order to obtain a better particle size distribution at the surface. Indeed, the particulate arrangement is sufficient when the cork particles have a particle size of between 0.5 - 3 mm, preferably between 1 and 3 mm. The distribution of said cork particles gives the membrane uniform coverage during the upper surfacing.
  • the calendering (4 and 5) consists in smoothing the membrane in order to avoid obtaining a membrane with irregularities on the surface using, preferably each time two rollers juxtaposed on either side of said membrane and placed on following each other. Calendering allows to obtain a smooth sealing membrane. It can be seen that only one calendering is necessary for the usual mineral fillers (granules and slate flakes) since the loads are aided by gravity. The heavy mineral fillers thus adhere more easily in the binder. On the other hand, the use of surface cork particles preferably involves double calendering. Indeed, said particles adhere less easily to the bituminous binder since the cork density is lower than the mineral charges usually used.
  • the broof-T2 is a fire test for the waterproofing membrane consisting of measuring the propagation of the generated flame under a flow of air. Note that there are many other fire tests. This fire test may vary from country to country. However, in all cases these tests evaluate the fire resistance of the material considered according to pre-established standards. It is found that the use of cork particles which have a particle size of between 1 and 2 mm on the first surface gives the protective membrane insufficient fire resistance. Indeed, this granulometric range does not include enough particles of different sizes to sufficiently cover the first surface. Therefore, the presence of said particles creates spaces during their distribution on the protective membrane and leads to expose a portion of the bituminous binder to the flame. This then promotes the spread of the flame.
  • Another advantage of this embodiment lies in the steam thermoprocessing of the cork particles which have a particle size of between 0.5 - 3 mm, preferably 1 - 3 mm.
  • This technique is based on two steps. First, the cork particles are reduced to granules. Then, these are thermotrazed with steam. The technique consists in concretely placing the cork granules in an autoclave oven, preferably at high temperature (300-360 ° C). This has the effect of causing the expansion of said particles which dilate and eventually agglomerate. This process provides hydrophobic cork granules. Thanks to steam thermoprocessing, the cork particles no longer absorb water. Therefore, the presence of hydrophobic cork particles on the upper surface of the protective membrane prevents the formation of microorganisms or algae on the surface.
  • the bituminous mass is mixed with cork particles which have a particle size of between 60 and 500 ⁇ m, preferably between 63 and 125 ⁇ m. Then, after the step of impregnating the bitumen reinforcement, for example, the cork particles, previously steam-treated with steam, which have a particle size of between 0.5, are distributed by means of a hopper. - 3 mm, preferably 1 - 3 mm on the first surface when the bitumen is still hot (180 ° C).
  • This embodiment targets the cork particles present in the membrane body. Note that this embodiment can be performed without having the presence of cork particles on the upper surface. It is then possible to obtain a protective membrane with cork particles only in the bituminous mass. ⁇ u> Table 2 ⁇ / u> Particles ⁇ 60 ⁇ m Particles between 63 - 500 ⁇ m Viscosity at 180 ° C (mPa.s) 21000 14000 Cold flexibility (° C) -12 -20 Penetration (dmm) 76 110
  • Table 2 compares the viscosity of the bituminous binder at 180 ° C (mPa.s), the cold flexibility of the protective membrane (° C) and the penetrability of said membrane (dmm) when using cork particles. , in the bitumen mass, which have a distribution less than 60 microns and cork particles which have a distribution between 63 - 500 microns. It should be noted that this last distribution has the desired characteristics in order to obtain a durable, quality and non-viscous protection membrane.
  • Table 3 makes a comparison between cork and the two mineral fillers (chalk and colemanite) usually used with the mineral or vegetable bituminous mass. It should be noted that the use of chalk or colemanite with a mass of mineral or vegetable bitumen is known, but not the use of cork as a filler in the mineral or vegetable bituminous mass. Let us add that the mineral fillers usually used have a higher density compared to cork. For example, chalk (2700 kg / m 3 ) has a higher density than cork (230 kg / m 3 ).
  • Table 3 compares for said materials various parameters: loops at 63 ⁇ m, 125 ⁇ m and 500 ⁇ m; the median diameter (X 50) and the oil absorbency capacity of each material expressed as a percentage by weight.
  • the percentage expressed represents the passage of particles in the screens. Therefore, the 500 micron pass passes all particles that have at least a particle size of 500 microns. Note that for the 3 materials, the passage is 100% so all the particles pass through the sieve. We see almost the same thing for the second passer-by. On the other hand, the passing of 63 microns does not allow any more to pass the particles of cork. This makes it possible to select the cork particles according to the desired particle size.
  • the median diameter corresponds to the passage of half of the particles through the sieve and targets the average grains. This provides information on the average size of cork particles.
  • the absorption of oil by the load used corresponds to the amount of standardized linseed oil that a mass of filler can absorb until reaching the saturation of the material and thus obtaining a paste. It is found that this parameter is very important for cork (600-700% by weight) compared to chalk (25-30% by weight) and colemanite (30-35% by weight).
  • cork 600-700% by weight
  • chalk 25-30% by weight
  • colemanite (30-35% by weight.
  • the use of cork can not affect the viscosity of the membrane in which case the impregnation step can be problematic because of the lack of coherence of the bituminous binder. Therefore, it is necessary that the oil remains in the crystalline zone of the bituminous binder in order to obtain a quality and durable protection membrane.
  • the cork particles included in the membrane body must have a particle size of between 60 and 500 ⁇ m, preferably between 63 and 125 ⁇ m.
  • the first surface of a protective membrane comprises cork particles which have a particle size of between 0.5 and 3 mm, preferably between 1 and 3 mm.
  • said membrane is calendered twice.
  • Table 4 ⁇ / u> Talc Cork (MF7) Unit To 500 ⁇ m 99 80 % To 250 ⁇ m 42 45 % To 125 ⁇ m 24 20 % Passing to 63 ⁇ m 2 5 %
  • Table 4 compares several loops (500, 250, 125 and 63 ⁇ m) for talc and cork.
  • talc is used as a mineral filler in order to be able to roll up the membrane in the form of a roll and to prevent this surface from sticking.
  • the replacement of talc with cork gives the same effect.
  • the use of cork allows for a lighter membrane without having to store two materials of different nature.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Textile Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Building Environments (AREA)
EP12157383.6A 2012-02-28 2012-02-28 Membrane de protection et son procédé de fabrication. Active EP2634306B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12157383.6A EP2634306B1 (fr) 2012-02-28 2012-02-28 Membrane de protection et son procédé de fabrication.
DK12157383.6T DK2634306T3 (da) 2012-02-28 2012-02-28 Beskyttelsesmembran og fremgangsmåde til fremstilling af samme
US13/778,239 US9493942B2 (en) 2012-02-28 2013-02-27 Protective membrane and method of manufacturing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12157383.6A EP2634306B1 (fr) 2012-02-28 2012-02-28 Membrane de protection et son procédé de fabrication.

Publications (2)

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EP2634306A1 EP2634306A1 (fr) 2013-09-04
EP2634306B1 true EP2634306B1 (fr) 2015-02-11

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3016903B1 (fr) 2014-01-28 2019-04-05 Onduline Procede de realisation d'un element de couverture en fibres impregne de bitume a comportement au feu ameliore, dispositif et composition.
EP3828226A1 (en) * 2019-11-26 2021-06-02 Sika Technology Ag An acoustic damping material comprising renewable raw materials

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB157217A (en) * 1915-06-24 1922-03-23 Max Rogler Improvements in roofing material for railway vehicles and the like
US1905827A (en) * 1926-11-12 1933-04-25 Rezyl Corp Floor covering
US2563115A (en) * 1949-10-22 1951-08-07 Servicised Products Corp Insulating and joint filler material
US3135069A (en) * 1958-12-31 1964-06-02 Werner H W Schuller Roofing
US3276906A (en) * 1963-08-08 1966-10-04 Shell Oil Co Process for preparing fire-retardant bituminous shingles by coating same with thermosetting acrylic resin
NL6709049A (da) * 1967-06-29 1968-12-30
NL7207442A (da) * 1971-06-25 1972-12-28
CH538579A (de) * 1971-11-17 1973-06-30 Duerst Felix Isoliermatte
US3937640A (en) * 1972-02-19 1976-02-10 Tajima Roofing Co., Ltd. Process for manufacturing a waterproofing assembly of laminated bituminous roofing membranes
CH567634A5 (da) * 1974-02-15 1975-10-15 Duerst Felix
DE2930895A1 (de) * 1979-07-30 1981-02-19 Thermoval Fussbodenheizung Bauelement
GB0000674D0 (en) * 2000-01-13 2000-03-08 Exxon Chemical Patents Inc Laminar articles containing layers of ethylene containing polymer elastomers containing resins
DE10331888B4 (de) * 2003-07-14 2005-11-10 Clariant Gmbh Elastisches Belagmaterial mit verbesserten Flammschutzeigenschaften sowie ein Verfahren zu dessen Herstellung

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EP2634306A1 (fr) 2013-09-04
DK2634306T3 (da) 2015-05-11
US9493942B2 (en) 2016-11-15
US20140072765A1 (en) 2014-03-13

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