WO2016102811A1 - Panneau d'isolation sous vide avec joint d'étanchéité amélioré - Google Patents
Panneau d'isolation sous vide avec joint d'étanchéité amélioré Download PDFInfo
- Publication number
- WO2016102811A1 WO2016102811A1 PCT/FR2015/053493 FR2015053493W WO2016102811A1 WO 2016102811 A1 WO2016102811 A1 WO 2016102811A1 FR 2015053493 W FR2015053493 W FR 2015053493W WO 2016102811 A1 WO2016102811 A1 WO 2016102811A1
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- Prior art keywords
- section
- vacuum insulation
- constricted
- seal
- joint
- Prior art date
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- 238000009413 insulation Methods 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 239000011162 core material Substances 0.000 claims abstract description 33
- 230000004888 barrier function Effects 0.000 claims abstract description 31
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- 230000007704 transition Effects 0.000 claims description 9
- 239000007789 gas Substances 0.000 abstract description 41
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
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- 238000011065 in-situ storage Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
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- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
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- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/263—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer having non-uniform thickness
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
-
- 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
- E04B1/76—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 heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
- E04B1/803—Heat insulating elements slab-shaped with vacuum spaces included in the slab
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2419/00—Buildings or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2607/00—Walls, panels
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/242—Slab shaped vacuum insulation
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
- Y02B80/10—Insulation, e.g. vacuum or aerogel insulation
Definitions
- the invention relates to a vacuum insulation panel (VIP) with improved sealing. Rising energy costs and energy efficiency regulations are the main sources of motivation for achieving improved insulation in the building sector. In addition to traditional foam and fiber insulation materials, vacuum insulation panels (VIP elements) are also available for this purpose.
- VIP elements have significantly better insulation properties, thus requiring a smaller thickness compared to conventional insulation materials for the same thermal resistance, but this advantage is accompanied by several well-known drawbacks, for example requirements and higher production costs and vulnerability to mechanical damage.
- a VIP element comprises a core material (or core) of a porous material which is wrapped by a layer having gas barrier properties.
- a bag or pocket or envelope
- the empty space is then filled with the core material, the air or gases present are evacuated to a lower pressure level than 10 "3 bar, the bag is finally sealed under vacuum and the product is removed from the vacuum treatment chamber
- Typical core materials are nano-porous materials such as silica powder or the like, or mattresses (or mats) fibers without binder, to avoid deterioration of the vacuum inside the VIP element, in particular by decomposition of organic binders.
- VIP elements have also been proposed with a stainless steel casing, these elements have not been very successful on the market despite less vulnerability to mechanical damage because the insulating properties are degraded by thermal bridging effect. on the side faces.
- laminated films are generally used as wrapping materials.
- These laminated films may consist of an (inner) inner layer, which is a sealing layer (or weld) made from a thermoplastic resin such as low density polyethylene or the like.
- a gas barrier layer (or gas barrier layer) made from a barrier material such as a metal layer, for example an aluminum foil or an aluminum deposit, is adhered to the sealing layer.
- they further include a protective liner on the outer side exposed to the atmosphere to protect the gas barrier layer from mechanical and / or chemical damage.
- Two laminated films are arranged so that the sealing layers can face each other, the sealing layers are fused together to form a gas-tight seal, heating under pressure at a temperature above the thermoplastic melting temperature but below the melting temperature of the gas barrier layer and the covering protective layer.
- multilayer laminates having multiple gas barrier layers separated by polymeric layers are also available.
- the core (or core) of the VIP is not completely enveloped by the gas barrier material because it necessarily remains a small cross section free of gas barrier layer having a certain thickness and the length of the joint width, which consists solely of the sealing material.
- the size of this cross section is however several orders of magnitude smaller than the overall surface of the VIP barrier gas barrier layer.
- An essential requirement in the building sector is a long service life (useful) associated with an acceptable reduction of the properties of the products, which can, in the case of insulation, go up to about 30 years.
- the long life is directly associated with the ability of the element to slow down the inevitable increase in internal pressure, ie the deterioration of the vacuum, due to diffusion. gases and / or steam in the VIP element. Gases and vapor can enter the VIP either through the membrane, i.e. through the gas barrier layers, or through the gaskets.
- WO2006077599 suggests adding an additional enveloping membrane the outer edge of the joint. Apart from a difficult adhesion of such an additional membrane to the seal around the edge, requiring an additional manufacturing step, the additional membrane can increase the thermal bridge and consequently negatively affect the thermal performance of the VIP.
- JP S82-141190U discloses a heat sealed seal with trapezoidal symmetrical constrictions which are intended to slow gaseous diffusion through the polymer matrix of the sealing material in the VIP core, see FIG. the constriction, respectively the shape of the sealing jig according to the pressing conditions and the unavoidable spreading of the polymer of the throttling zone can create problems with increased wear of the laminate, which can lead to the formation of cracks in the level of the corners of the choke.
- EP2224159 discloses seals with asymmetric chokes and reduced laminate wear during processing.
- Asymmetric constrictions are formed by a heat-fusing (or heat-sealing) process and pressing at the sealing section and include a number of constricted (or thinned) zones, referred to as thin-walled portions, interspersed with non-constricted areas, referred to as thick-walled portions. , see Figure 2. Due to the continuous but progressive increase and decrease in polymer thickness at the throttle, the throttling can be narrowed in the thin-walled portions without risk of wear and in particular crack formation.
- EP2224159 compares the atmospheric gas permeability of the asymmetrical throat sealing section with the symmetrical constrictions according to JP S82-141190U for the same laminate and an identical thickness of the sealing layer in the thin-walled portion. and for the same number (four) of thin-walled parts. In the steady state (or equilibrium regime), the gas permeability is identical for both designs but the symmetrical design shows a tendency to deteriorate the laminate.
- EP2224159 provides for cutting the laminated film on the outer circumferential side of the sealing section such that a thick-walled portion forms the new circumferential side.
- the outermost, however, the general lesson is that the constricted sections are normally arranged in the middle of the width of the joint section, that is, away from the inner circumferential side of the joint and away from the circumferential side outer of the seal, as in JP S82-141190U.
- the object of the invention is to provide a VIP element with an improved seal design which further reduces gas diffusion and therefore extends the service life of the element. VIP.
- a vacuum insulation board comprises two laminated (or laminated or multilayer) films each having at least one gas barrier layer and a sealing layer, a core material (or core) sealed at reduced pressure between the two laminated films arranged so that the sealing layers can be optionally opposite each other (or affixed or opposite or facing each other or in correspondence or face to face face-to-face), and a seal extending from the inner peripheral edge of the two laminated films to an outer peripheral edge defining a joint width, the sealing layers being fused to one another encircling the entire circumference (or periphery) of the core material, the seal having at least one neck (or portion) constricted (or thinned or narrowed or pinched or constricted or reduced or compressed) with a thickness of the fused seal layers which is less than the thickness of the unshrunk fused seal layers extending substantially parallel to the edges, the one or more constricted sections (or part (s) being disposed at the outer peripheral edge and or at the inner
- the gas permeability through the polymer matrix includes the gas absorption steps in the polymer matrix at the gas barrier layer free cross section of the outer peripheral edge directed to the outer atmosphere, the diffusion to the polymer interior and desorption at the cross-section free of gas barrier layer of the inner peripheral edge oriented towards the VIP core. While, as already discussed in the comparison of different throttling designs of EP2224159, the gas permeability is equal to the stationary state regardless of the specific shape as long as the overall length of the throat of the thin wall section the narrowing and its thickness are equal, the inventors have realized that the position of the constriction has a real effect during the transition step, that is to say during the time required for the gas permeability to reach a stationary state.
- the thickness of the constricted section (s) is 50% or less, in particular 25% or less, preferably 15% or less, in particular 10% or less of the thickness of the sealing layers. merged not strangled.
- the ratio of the thickness of the choked section (s) to the thickness of the unshrunk seal layers is referred to below as the throttling ratio (or thinner ratio).
- the total length of the constricted section (s) is 5% or more, preferably 10% or more, particularly 25% or more of the joint width.
- the overall length of the strangled sections advantageously reduces the gas permeability and therefore the mass flow entering the core of the VIP. Although an increase in overall length would further reduce gas permeability, the necessary displacement of the polymer resin during thermal pressing and melting causes some wear on the laminate, particularly on the gas barrier layer.
- the total length of the constricted section (s) is preferably 75% or less, preferably 50% or less of the joint width.
- the seal comprises a plurality of constricted sections (or additional constricted sections). Between two strangled sections is a non-throttled section. These non-choked sections may include areas having a thickness greater than the thickness of the sum of the two polymer layers heated and fused due to polymer migration from the choked section (s) into the non-choked section (s).
- the constricted section (s) may have an area of constant thickness.
- the transition zone between the zone of constant thickness of the constricted section and the non-throttled joint section may be concave in the form of an arc (or rounded) or may have a conical shape.
- the zone of constant thickness of the throttled section and the non-throttled joint section may also have a herringbone shape.
- this variant is less preferred in comparison with a rounded shape or a conical shape.
- the constricted section has an asymmetrical cross section, in particular a convex-concave cross section.
- the asymmetrical cross section design can reduce wear on the laminate and therefore allow safer processing during manufacturing by reducing the scrap rate.
- the asymmetrical cross-section advantageously provides in situ a plurality of individual constricted zones, the thin-walled portions spaced from one another by non-throttled zones, the thick-walled portions in a heating and melting process by a forming jig. of appropriate design.
- the laminated films are multilayer laminates having multiple gas barrier layers separated by polymeric layers.
- FIG. 1 is a cross section of the seal according to the state of the art disclosed in the document JP S82-141190U;
- FIG. 2 is a detail of the cross section of the seal according to the state of the art. disclosed in EP2224159
- FIG. 3 is a cross-section of a first embodiment according to the invention
- FIG. 4 is a cross-section of a second embodiment according to the invention
- FIG. 5 is a forming jig. for the manufacture of the seal according to the second embodiment of the invention according to FIG. 4
- FIGS. 6a, b are two diagrams illustrating a normalized mass flow (or flow) entering the VIP core for constrictions in different positions in the joint as a function of the throttle ratio, Figs.
- FIG. 7a, b are two diagrams illustrating a standard mass flow rate entering the VIP core for different throttle lengths in the seal as a function of thrust ratio
- Figs. 8a, b are two diagrams illustrating a normalized mass flow rate entering the soul of the VIP for different numbers of throttles in the joint depending on the throttling ratio.
- FIG. 1 illustrates a cross section of the seal according to the state of the art disclosed in JP S82-141190U.
- the vacuum insulation panel 10 comprises a joint section 11, a VIP core 12 filled with a core material (not shown), and is integrated between two laminates 13 which each consist of a sealing layer 14 on which is bonded a gas barrier layer 15.
- the two laminated films 13 are arranged so that the sealing layers 14 face each other, the sealing layers 14 are fused one to the other. the other for forming a gastight seal by heating under pressure at a temperature above the melting temperature of the polymeric material of the sealing layer.
- FIG. 2 illustrates a detail of the cross section of the seal 21 according to the state of the art disclosed in EP2224159.
- the cross sectional detail illustrates only the seal without extending to the side faces of the VIP core.
- the two laminates 23 embedding the VIP core material are arranged as in FIG. 1 and each consist of a sealing layer 24 and a gas barrier layer 25.
- the laminate also includes a protective cover layer 26 disposed on the outside to protect the gas barrier laminate layer from mechanical and / or chemical damage.
- Fig. 1 there is a throttled section 27 disposed in the central portion of the seal section 21, which has a convex-concave asymmetric cross section with two thin-walled portions 28a and three thick-walled portions 28b .
- the thin-walled portions 28a have a smaller thickness compared to the non-throttled joint sections, while the thick-walled portions 28b have a greater thickness due to the migration of polymers during press forming and melting.
- FIG. 3 illustrates a first embodiment according to the invention.
- the vacuum insulation panel 30 comprises a seal section 31, a VIP core 32 filled with a core material (not shown) and integrated between two laminates 33, which each consist of a sealing layer 34 , a gas barrier layer 35 and a covering protective layer 36.
- the choked section (or portion) 37 is not willing in the central portion of the seal 31, but at the outer peripheral edge of the seal 31 so that the throttled section 37 is in direct contact with the outside atmosphere.
- the shape of the constriction 37 is the same as in FIG. 1, that is to say that the zone of constant thickness of the throttled section 37 is connected to the area of the non-throttled joint 39 by a transition zone 38 of conical shape.
- FIG. 4 illustrates a second embodiment according to the invention.
- the vacuum insulation panel 40 comprises a joint section 41, a VIP core 42 filled with a core material (not shown) and embedded between two laminates 43, with a sealing layer 44, a barrier layer to the gases 45 and a covering protective layer 46.
- the joint section 41 has two constricted sections 47a and 47b, the first constricted section 47a being disposed at the outer peripheral edge of the joint (as in the embodiment illustrated in FIG. 3).
- the second throttled section 47b is located at the inner peripheral edge of the two laminated films 43, so that it forms the "edge" of the core of the VIP 42.
- the non-throttled section 49 is disposed in the central portion of the joint .
- Figure 4 is not drawn to scale.
- the two constricted sections 47a, 47b have a convex-concave asymmetric shape with thin-walled portions 48a and thick-walled portions 48b.
- the thickness of the sealing layers 34, 44 is 50 ⁇ , which gives a thickness of the non-throttled joint 39, 49 of 100 ⁇ .
- the thickness of the throttled sections of constant thickness 37 and the thickness of the thin-walled portions 48a are set at 10 ⁇ , that is to say at a throttling ratio of 90%.
- the width of the throat 37 is about 1 cm, the widths of the throat sections 47a, 47b are each set at 10 mm each for a joint sealing width of 3 cm.
- the greater width of the constricted sections 47a, 47b serves to compensate for the thick wall portions 48b in the two constricted sections 47a, 47b.
- the VIP core 32, 42 can be filled with any suitable material known to those skilled in the art.
- the preferred materials are nano-porous materials such as silica powder or the like, or non-binder fiber mats, particularly glass wool without a binder, in order to avoid deterioration of the vacuum inside. of the VIP element.
- fiber mats bound with an inorganic binder such as, for example, water glass, may also be used.
- a constricted section at the outer peripheral edge of the joint can be achieved quite easily by cutting to dimensions following the heating step under pressure and melting through a constricted section manufactured with a size oversized. In other words, an oversized part of the laminate is removed by cutting inside the constricted section.
- a constricted section at the inner peripheral edge can be achieved by a suitably designed forming template.
- a forming jig is illustrated in FIG. 5 for compression-thermofusion of a seal according to one embodiment of the invention as illustrated and described in FIG. 4 above.
- Two laminates 53, each with a sealing layer 54, a gas barrier layer 55 and a covering protective layer 56 are placed facing each other (opposite each other) with the sealing layer 54 between the template.
- forming apparatus 50 comprising upper and lower heating and compression jigs 51a, 51b.
- a silicone rubber sheet 52 On the lower template 51b is placed a silicone rubber sheet 52, which serves as a load distribution member to form the opposite side of the convex-concave asymmetric shape.
- Projections 57 are disposed at the lower side of the upper heating and compression jig 51a, facing the laminates 53. Note that on the right side with two projections 57, the rightmost projection 57e is disposed at the outer edge of the upper template 51a, so that the sealing layer to the right of the projection 57e is not heated by direct contact by pressing. The right side is oriented, as can be seen in Figure 4, towards the soul of the VIP 42.
- the upper template 51a On the left side, that is, facing the atmosphere, the upper template 51a has three projections 57a, 57b, 57c, further the base section of the forming template 51a as well as the lower template 51b. extend over the position of the leftmost protrusion 57a, thereby heating the laminates 53 also on the left side of the protrusion 57a.
- the forming templates 51a, 51b are removed and the asymmetric constriction thus formed is cut at the indicated dashed location 58 to form a thin-walled portion of the constricted section as illustrated.
- the forming templates 51a, 51b may be equipped with an integrated cutting tool to permit cutting without alignment of the seal respectively of the VIP element in a separate cutting apparatus. It is obvious that a simplified design of the forming template illustrated in FIG.
- FIG. 5 by removing the protrusions 57d, 57e would lead to a design with an asymmetrical constriction only arranged at the level of the outer peripheral edge and vice versa by removing the protrusions 57a, 57b , 57c on the left for asymmetric throttle positioning at level of the internal peripheral edge.
- Figures 6a and 6b illustrate by modeling a normalized mass flow rate (or flow) entering the VIP core for throttles having a throttle ratio of 50, respectively 90% at different positions in the joint.
- a throttled section with a throttle ratio of 50% (FIG. 6a) and 90% respectively (FIG. 6b) of the non-throttled thickness is placed in five positions of the seal, namely at the outer edge, at 25, 50% (in the middle), 75% of the joint width and at the inner edge.
- the positioning of the throttle at 25 and 75% of the width of the seal, respectively, produces a curve between the two extremes of the central position and the position at the inner / outer edge. Since the total mass flow in the VIP core corresponds to the integrated (normalized) mass flow versus time (normalized), there is a definite advantage in placing the throttle as close as possible to the joint edges, ideally such that the throttled section forms the external, respectively internal, cross-section towards the atmosphere or towards the VIP core.
- FIGS. 7a and 7b illustrate by modeling a standardized mass flow entering the soul of the VIP for a throttling with a throttle ratio of 50% (Figure 7a) respectively 90% ( Figure 7b), the influence of the throttling length.
- the mass flow rate calculated for restrictions in different positions is normalized by the mass flow rate of the non-throttled reference for the type of throttling as presented in FIG. 3 and illustrated on the ordinates as a function of the time normalized by the diffusion coefficient D and the width L of the joint section.
- the constricted sections are located in the middle of the joint section, ie in the position as illustrated in Figure 1.
- throttling The sensitivity to the throttling length strongly depends on the ratio For throttling, the thinner the throttle or the higher the throttle ratio, the more efficient the length increase. It can be seen from Figs. 7a, 7b that the stationary state is reached earlier, the longer the constricted section is. However, since the steady state steady state rate is significantly lower, there is a net benefit in extending the length of a throttling.
- FIGS. 8a and 8b illustrate, by modeling, a standardized mass flow entering the VIP core for a throttling with a throttling ratio of 50% (FIG. 8a) respectively of 90% (FIG. 8b), the influence of the number of strangled areas.
- a throttling with the overall length of the three, respectively five, choked zones i.e. with a length of 22.5% and 37.5, is added to Figures 8a, 8b.
- FIGs. 8a, 8b are consistent for the stationary state with the disclosure of EP2224159, which illustrates, in Table 1, a decrease in gas permeability. with increasing number of throttling zones in the form of asymmetric thin-walled parts.
- the increase in the useful life of the VIP element according to the invention can be several years or even tens of years by an integrated mass flow thus reduced during the transition state, which leads to a lower internal pressure of the VIP when it enters the stationary state of gas permeability.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Thermal Insulation (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/535,187 US20170368799A1 (en) | 2014-12-23 | 2015-12-14 | Vacuum insulation panel with improved sealing joint |
CN201580070403.6A CN107107557A (zh) | 2014-12-23 | 2015-12-14 | 具有改进的密封接头的真空绝热板 |
EP15830797.5A EP3237201A1 (fr) | 2014-12-23 | 2015-12-14 | Panneau d'isolation sous vide avec joint d'étanchéité amélioré |
JP2017533866A JP2018502259A (ja) | 2014-12-23 | 2015-12-14 | 改良されたシーリングジョイントを有する真空絶縁パネル |
KR1020177020200A KR20170097169A (ko) | 2014-12-23 | 2015-12-14 | 개선된 밀봉을 갖는 진공 단열 패널 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1463241A FR3030353B1 (fr) | 2014-12-23 | 2014-12-23 | Panneau isolant sous vide avec joint d'etancheite ameliore |
FR1463241 | 2014-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016102811A1 true WO2016102811A1 (fr) | 2016-06-30 |
Family
ID=53039528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2015/053493 WO2016102811A1 (fr) | 2014-12-23 | 2015-12-14 | Panneau d'isolation sous vide avec joint d'étanchéité amélioré |
Country Status (7)
Country | Link |
---|---|
US (1) | US20170368799A1 (fr) |
EP (1) | EP3237201A1 (fr) |
JP (2) | JP2018502259A (fr) |
KR (1) | KR20170097169A (fr) |
CN (1) | CN107107557A (fr) |
FR (1) | FR3030353B1 (fr) |
WO (1) | WO2016102811A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11247369B2 (en) | 2015-12-30 | 2022-02-15 | Whirlpool Corporation | Method of fabricating 3D vacuum insulated refrigerator structure having core material |
US10632708B2 (en) * | 2016-02-29 | 2020-04-28 | Alienus Film Llc | Insulating film |
WO2021124555A1 (fr) * | 2019-12-20 | 2021-06-24 | 三菱電機株式会社 | Matériau d'isolation sous vide et boîte d'isolation |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS57141190U (fr) | 1981-03-02 | 1982-09-04 | ||
JP2003314786A (ja) * | 2002-04-25 | 2003-11-06 | Matsushita Refrig Co Ltd | 真空断熱材、並びに真空断熱材を用いた冷凍機器及び冷温機器 |
WO2006077599A2 (fr) | 2005-01-24 | 2006-07-27 | Thermovac Ltd | Panneau d'isolation thermique sous vide |
JP2007016927A (ja) * | 2005-07-08 | 2007-01-25 | Matsushita Electric Ind Co Ltd | 真空断熱材、および真空断熱材の製造方法 |
EP2224159A1 (fr) | 2008-09-10 | 2010-09-01 | Panasonic Corporation | Materiau d'isolation thermique sous vide et procede de production correspondant |
CN103538300A (zh) * | 2012-07-16 | 2014-01-29 | 苏州维艾普新材料有限公司 | 一种热封复合阻隔膜及其制备方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS62141190U (fr) * | 1986-02-28 | 1987-09-05 | ||
JP2004099060A (ja) * | 2002-09-05 | 2004-04-02 | Nisshinbo Ind Inc | 真空断熱材用包装袋の製造方法及びその包装袋を用いた真空断熱材 |
US20060019568A1 (en) * | 2004-07-26 | 2006-01-26 | Toas Murray S | Insulation board with air/rain barrier covering and water-repellent covering |
WO2009069681A1 (fr) * | 2007-11-27 | 2009-06-04 | Asahi Fiber Glass Company, Limited | Panneau d'isolation thermique et structure d'isolation thermique |
JP5040881B2 (ja) * | 2008-09-10 | 2012-10-03 | パナソニック株式会社 | 真空断熱材 |
JP2010255805A (ja) * | 2009-04-28 | 2010-11-11 | Panasonic Corp | 真空断熱材 |
CN104746752A (zh) * | 2013-12-25 | 2015-07-01 | 戴长虹 | 密封条封边的金属真空复合绝热板及其制备方法 |
-
2014
- 2014-12-23 FR FR1463241A patent/FR3030353B1/fr not_active Expired - Fee Related
-
2015
- 2015-12-14 JP JP2017533866A patent/JP2018502259A/ja active Pending
- 2015-12-14 KR KR1020177020200A patent/KR20170097169A/ko not_active Application Discontinuation
- 2015-12-14 EP EP15830797.5A patent/EP3237201A1/fr not_active Withdrawn
- 2015-12-14 WO PCT/FR2015/053493 patent/WO2016102811A1/fr active Application Filing
- 2015-12-14 US US15/535,187 patent/US20170368799A1/en not_active Abandoned
- 2015-12-14 CN CN201580070403.6A patent/CN107107557A/zh active Pending
-
2021
- 2021-04-08 JP JP2021001303U patent/JP3234649U/ja active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57141190U (fr) | 1981-03-02 | 1982-09-04 | ||
JP2003314786A (ja) * | 2002-04-25 | 2003-11-06 | Matsushita Refrig Co Ltd | 真空断熱材、並びに真空断熱材を用いた冷凍機器及び冷温機器 |
WO2006077599A2 (fr) | 2005-01-24 | 2006-07-27 | Thermovac Ltd | Panneau d'isolation thermique sous vide |
JP2007016927A (ja) * | 2005-07-08 | 2007-01-25 | Matsushita Electric Ind Co Ltd | 真空断熱材、および真空断熱材の製造方法 |
EP2224159A1 (fr) | 2008-09-10 | 2010-09-01 | Panasonic Corporation | Materiau d'isolation thermique sous vide et procede de production correspondant |
CN103538300A (zh) * | 2012-07-16 | 2014-01-29 | 苏州维艾普新材料有限公司 | 一种热封复合阻隔膜及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2018502259A (ja) | 2018-01-25 |
JP3234649U (ja) | 2021-10-28 |
EP3237201A1 (fr) | 2017-11-01 |
FR3030353A1 (fr) | 2016-06-24 |
FR3030353B1 (fr) | 2021-02-12 |
US20170368799A1 (en) | 2017-12-28 |
KR20170097169A (ko) | 2017-08-25 |
CN107107557A (zh) | 2017-08-29 |
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