GB2548887A - A panel for thermal insulation - Google Patents

A panel for thermal insulation Download PDF

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Publication number
GB2548887A
GB2548887A GB1605490.0A GB201605490A GB2548887A GB 2548887 A GB2548887 A GB 2548887A GB 201605490 A GB201605490 A GB 201605490A GB 2548887 A GB2548887 A GB 2548887A
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GB
United Kingdom
Prior art keywords
panel
liquid
membrane
thermal insulation
building
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.)
Granted
Application number
GB1605490.0A
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GB2548887B (en
Inventor
Livio Speroni Robert
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.)
Radmat Building Products Ltd
Original Assignee
Radmat Building Products Ltd
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Filing date
Publication date
Application filed by Radmat Building Products Ltd filed Critical Radmat Building Products Ltd
Priority to GB1605490.0A priority Critical patent/GB2548887B/en
Publication of GB2548887A publication Critical patent/GB2548887A/en
Application granted granted Critical
Publication of GB2548887B publication Critical patent/GB2548887B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76Heat, 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
    • E04B1/78Heat insulating elements
    • E04B1/80Heat insulating elements slab-shaped
    • E04B1/803Heat insulating elements slab-shaped with vacuum spaces included in the slab
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/04Layered 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
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    • B32B15/046Layered 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 foam
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    • B32B15/14Layered products comprising a layer of metal next to a fibrous or filamentary layer
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    • B32B3/00Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products 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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    • B32B3/26Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products 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
    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B32B9/00Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/041Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B32B2250/00Layers arrangement
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    • B32B2255/00Coating on the layer surface
    • B32B2255/06Coating on the layer surface on metal layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/26Polymeric coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/101Glass fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
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    • B32B2266/00Composition of foam
    • B32B2266/12Gel
    • B32B2266/126Aerogel, i.e. a supercritically dried gel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/30Properties of the layers or laminate having particular thermal properties
    • B32B2307/304Insulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51Elastic
    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/538Roughness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546Flexural strength; Flexion stiffness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558Impact strength, toughness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582Tearability
    • B32B2307/5825Tear resistant
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/712Weather resistant
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/724Permeability to gases, adsorption
    • B32B2307/7242Non-permeable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/726Permeability to liquids, absorption
    • B32B2307/7265Non-permeable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/744Non-slip, anti-slip
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00Buildings or parts thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00Buildings or parts thereof
    • B32B2419/06Roofs, roof membranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00Containers; Receptacles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2509/00Household appliances
    • B32B2509/10Refrigerators or refrigerating equipment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00Walls, panels
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/24Structural elements or technologies for improving thermal insulation
    • Y02A30/242Slab shaped vacuum insulation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/10Insulation, e.g. vacuum or aerogel insulation

Abstract

The panel includes a vacuum insulated panel (VIP) 3 and a coating of liquid applied membrane 4 on at least one surface of the VIP. The membrane may encapsulate the panel and have a roughened surface texture 6. The membrane may be a polyurethane elastomeric membrane. Also claimed is a method of making a panel where the panel may be formed by a two part spray where one part is sprayed from a certain distance and liquid to form a roughened surface is sprayed from a greater distance. The panel may be used on a building as part of a wall, roof, floor or on an external or internal surface of a building.

Description

A panel for thermal insulation
The invention relates to a panel for thermal insulation, which may be typically used in building applications, but is not limited to use in this area.
Most buildings are designed and built with some form of thermal insulation, for example, in floors, walls and roofs. Thermal insulation helps to prevent loss of energy and save costs. For example, in the winter, thermal insulation can help to prevent loss of thermal energy from within a building to the environment. This means that heating costs can be reduced, as less heat needs to be supplied to the building.
Similarly, in the summer, the thermal insulation can act to reduce transfer of thermal energy from the environment into a cooled environment, for example from the hot environment outside into an air conditioned building.
Thermal insulation can act to mainly prevent at least some of the three types of transfer of thermal energy, namely conduction, convection and radiation.
It is known to provide panels for insulation. These panels help to prevent convection by reducing movement of particles which transfer thermal energy. The panels need to be fairly thick, in order to provide good thermal insulation against convection. A problem with these panels can be in applications where maximising space is key. The thick panels will act to significantly reduce the space within a building. Consequently, various improvements have been developed to attempt to overcome this problem.
One such solution is the provision of a vacuum insulated panel, such as the ProTherm Quantum® or Kingspan’s OPTIM-R® panel. These panels comprise an isolated core formed of a rigid, highly porous material. The core is wrapped by a membrane and subsequently air is evacuated. This leaves behind a rigid highly porous core which is vacuum packed, i.e. tightly sealed by the membrane.
Vacuum panels have an additional benefit, in that both conduction and convection can be significantly reduced by the provision of a vacuum. It should be noted that although the word “vacuum” is used, in reality, a perfect vacuum is not realistically achievable, but rather the vacuum is a “near-vacuum”, i.e. having a pressure significantly below atmospheric pressure. Since there is no (i.e. a negligible amount of) medium to transfer the thermal energy in the vacuum, then there can be no thermal energy transfer by convection and thus good insulation. Moreover, the low pressure provided by the vacuum in the panel reduces the conductivity (which is caused by collisions between particles) since the distance between particles which could collide is significantly increased by the evacuation of most of the particles capable of thermal energy transfer.
Thus, since the thermal insulation properties of vacuum panels are far superior to conventional insulation panels, there is a further benefit that much thinner panels are required than previously. For example, a 4 cm thick panel could replace a conventional 20 or 22 cm thick panel. Thus the advantages of space saving can be realised.
However, a problem with currently used vacuum insulated panels arises from the membrane used to surround the core being a thin, flexible foil. This material is beneficial for creating the vacuum, since it can tightly surround the core and follow its shape. However, it can easily be damaged if stepped on with a sharp item (such as a piece of gravel on a person’s boot on a construction site) and/or easily penetrated by sharp objects. Such damage compromises the vacuum within the panel and as such, the thermal performance of the vacuum panel is significantly reduced.
Since a compromised panel will not provide the thermal performance expected, any building with such panels may not be thermally efficient and may have a reduced thermal efficiency compared to other buildings. As a result, there will need to be more energy expenditure within a building than at present with conventional panels.
Further, if a vacuum insulated panel is damaged, there are financial losses as a result of high energy expenditure and also on replacing damaged panels, in particular because vacuum insulated panels are much more expensive than their conventional counterparts.
In order to protect the panels against damage, great care has to be taken in their transport and installation. This is not easy to do without dedicated personnel, especially with the use of forklift trucks and on construction sites.
One possible solution to this problem has been to cover the surfaces of the panel with solid sheets of rubber crumb material.
According to a first aspect of the invention, there is provided a panel for thermal insulation comprising: a vacuum insulated panel; and a coating of liquid-applied membrane on at least one surface of the vacuum insulated panel.
By coating at least one surface of the vacuum insulated panel, protection is provided for the panel. Intimate contact between the surface and the liquid-applied membrane can be obtained. This is not available in the known method of adhering a pre-formed solid sheet to a surface of a vacuum insulated panel. A vacuum insulated panel comprises a core surrounded by a membrane wall. The core is evacuated of air, thereby forming a vacuum and the membrane wall seals the core, thereby maintaining the vacuum therein. The core may be formed of a porous structure which serves to support the membrane wall against atmospheric pressure. The membrane wall may be formed of a metallic foil.
In at least some embodiments, the coating of liquid-applied membrane encapsulates the vacuum insulated panel.
Among the advantages of encapsulation are that all surfaces of the panel are coated. This allows the panel to be protected on all sides and thus not to be accidentally damaged on a non-protected side.
In at least some embodiments, the coating of liquid-applied membrane has a roughened surface texture.
By roughening the surface with a texture, a better grip of the panel can be achieved and thus damage due to the panel slipping from lack of grip and falling can be mitigated.
In at least some embodiments, the roughened surface texture is formed on only one surface of the panel.
By roughening only a single surface, an orientation of the panel can be established. For example, an “up-side” and a “down-side” can be defined and should a panel need to be placed in a particular configuration, this can be more easily achieved.
In at least some embodiments, the liquid-applied membrane is a polyurethane elastomeric membrane.
The polyurethane elastomeric membrane provides a waterproof and durable surface, ensuring that the panel can be utilised in protected environments and exposed to adverse weather conditions. The material properties also provide high impact and tear strength and sufficient elasticity to allow potentially damaging applied loads not to damage the membrane or the underlying panel. Further, the underlying core of the panel can deform slightly under an impact with a sharp object. The coating of a coated panel can deform by a comparable amount to the underlying core under applied loading. Thus, a panel with high impact and damage resistance can be realised.
In at least some embodiments, the liquid-applied membrane comprises a formulation comprising two component parts which are combined.
This ensures that the membrane sets quickly, since the components are mixed and applied directly. The benefits of this are short processing time, which can be beneficial as the panels, if encapsulated or coated on opposite sides may need to be turned over without compromising the already-coated side.
According to a second aspect of the invention, there is provided a method of forming a panel for thermal insulation comprising: coating at least one surface of a vacuum insulated panel with a liquid-applied membrane.
In at least some embodiments, the coating step comprises encapsulating the vacuum insulated panel with the liquid-applied membrane.
In at least some embodiments, the coating step comprises applying the liquid-applied membrane by spraying.
In at least some preferred embodiments, liquid to form a base portion of the liquid-applied membrane is sprayed onto the vacuum insulated panel from a first distance therefrom, and liquid to form a roughened surface texture of the liquid-applied membrane is sprayed onto the base portion from a second distance greater than the first distance.
The base portion may comprise a uniform base portion, such that a first uniform coating of liquid-applied membrane is formed on the panel.
In at least some embodiments, the liquid-applied membrane is a polyurethane elastomeric membrane.
In at least some embodiments, the method further comprises combining two component parts to make a formulation which is used as the liquid applied to the vacuum insulated panel.
The panel for thermal insulation of the present invention may be used for buildings or structures, and may also be used as thermal insulation in applications such as fridges, freezers, shipping containers and the like.
According to a third aspect of the invention, there is provided a method of using a panel for thermal insulation of any of the embodiments of the first aspect of the invention, or as formed using the method of any of the embodiments of the second aspect of the invention, the method comprising using the panel for thermal insulation in or on a building or structure.
Using a panel in or on a building or structure will enable more reliably improved thermal insulation properties, and thus savings in energy and cost, since the thermal efficiency of the panels will not be compromised due to accidental destruction of the vacuum.
In at least some embodiments, the method comprises using the panel for thermal insulation in or on at least one of: an external-facing surface of the building or structure; an internal-facing surface of the building or structure; a wall or roof of the building or structure; and a floor of the building or structure.
Thus, the panels of the present invention could be used to insulate many alternative surfaces of a building, both for protected surfaces and for those exposed to adverse weather conditions, birds landing, etc.
According to a fourth aspect of the invention, there is provided a building or structure comprising a panel for thermal insulation of any of the embodiments of the first aspect of the invention, or as formed using the method of any of the embodiments of the second aspect of the invention. A building or structure having the provision of such a panel will realise more reliably improved thermal insulation properties, and thus savings in energy and cost, since the thermal efficiency of the panels will not be compromised due to accidental destruction of the vacuum.
At least in the preferred embodiments of the invention, the coating of liquid-applied membrane on a surface of a vacuum insulated panel produces a protective layer which is bonded to the surface at all parts thereof. By using a coating step, whether by spraying, painting, dipping or otherwise, both bonding to and coverage of the surface is achieved by that step. The resulting coated surface can maintain flexibility, and the material of the surface, such as metal foil, can flex together with the coating if subject to external forces, producing a resilient combination. In particular, the material of the surface is protected from being pierced by sharp objects. The coating can thus improve the puncture resistance of a vacuum insulated panel.
Further aspects, embodiments and features of the invention will now be described, by way of example only, according to the following numbered drawings.
It should be noted that the Figures are schematic only and not to scale.
Figure 1 shows a perspective view of a vacuum insulated panel as known from the prior art;
Figure 2 shows a cross section along the line A-A of the known vacuum insulated panel of Figure 1;
Figure 3 shows a perspective view of a panel of the present invention according to a first embodiment;
Figure 4 shows a cross section along the line B-B of the panel of Figure 3;
Figure 5 shows a perspective view of a panel of the present invention according to a second embodiment;
Figure 6 shows a cross section along the line C-C of the panel of Figure 5;
Figure 7 shows a perspective view of the vacuum insulated panel of Figure 1, having a liquid-applied membrane being applied by spraying at a first distance from the panel; and
Figure 8 shows a perspective view of the panel of Figure 3, having a textured surface being applied by spraying liquid-applied membrane from a second distance from the panel.
Figures 1 and 2 show a vacuum insulated panel 1 as known from the prior art. The vacuum insulated panel 1 comprises a core 3 and a membrane wall 2.
The core 3 is a rigid, highly porous structure which can support its shape against the atmospheric pressure on the membrane wall 2 when air is evacuated from the core 3 to form a vacuum. The membrane wall 2 surrounds the core 3 and is sealed, thereby maintaining the vacuum within the core 3.
The core 3 may for example be formed of materials such as fumed silica, aerogel, perlite or glass fibre.
The membrane wall 2 is typically formed of a metallic foil.
Figures 3 and 4 show a panel 10 according to a first embodiment. The panel 10 comprises a prior art vacuum insulated panel 1 which has been coated on at least one surface by a liquid-applied membrane 4. Thus a coated vacuum insulated panel 10 is obtained.
The liquid-applied membrane 4 provides an extra layer on top of the foil membrane wall 2 of the panel 10, thereby forming a thicker, more damage-resistant outer layer. The application of the liquid-applied membrane 4 as a coating provides intimate contact between the membrane wall and the liquid-applied membrane.
This is a more intimate contact than can be achieved by adhering a pre-formed solid sheet to the membrane wall.
The application of the membrane 4 as a liquid can be carried out to provide an even and uniform coating over the surface of the panel 10.
The coating of liquid-applied membrane 4 encapsulates the vacuum insulated panel as can be envisaged from Figures 3 and 4. The panel is coated on its upper and lower surfaces, its side surfaces and also at its edges and corners. The use of a liquid-applied membrane can provide such encapsulation, providing all round protection for the vacuum insulated panel 1. The use of pre-formed solid sheets, even if applied to all the surfaces of a vacuum insulated panel 1, would not provide encapsulation.
The liquid-applied membrane 4 may be a polyurethane elastomeric membrane, for example, the VERDISEAL^“ Membrane which is part of the DOW® VERDISEAL^“ liquid-applied roof waterproofing system by the DOW® Chemical Company.
The liquid-applied membrane 4 may comprises a formulation comprising two component parts which are combined. Thus once applied, the formulation will quickly set.
Figures 5 and 6 show a panel 20 according to a second embodiment. At least one surface 5 of the coating of liquid-applied membrane 4 has a roughened surface texture 6. By roughening only the top surface 5 of the panel 20 as shown, the panel can be provided with a “non-slip” surface. In addition, an orientation of the panel can be established. For example, textured surface 5 could be designated as an “up-side” or upwards-facing surface, while the opposite facing surface could be designated as a “down-side” or downwards-facing surface. These designations could allow easy placing of the panel.
In Figures 2, 4 and 6, the membrane wall 2 is shown much thicker than it would be in practice, for purposes of illustration. Similarly, in Figures 4 and 6, the liquid-applied membrane 4 is shown thicker than it would be in practice. In the embodiments, enough liquid is applied to form the membrane as a complete coating without gaps.
Figures 5 and 6 show the roughened surface texture 6 formed on only one surface 5 of the panel 20; however it is envisaged that any number of sides of the panel can be provided with a surface texture. Irrespective of how many surfaces have a roughened surface texture, the texture provides improved grip of the panel, thereby mitigating damage of the panel due to slippage and dropping.
Figures 7 and 8 respectively show embodiments for manufacturing a panel 10 according to the first embodiment and a panel 20 according to the second embodiment. Figure 7 shows a uniform base coat of liquid-applied membrane 4 being sprayed from a spray nozzle 7 onto the surface of a vacuum insulated panel 1 from a first distance Di. The spray nozzle 7 is moved following the surface of the panel 1 such that a base portion is formed. The base portion is a uniform coating of liquid-applied membrane on the panel and is an even and uniform base coat on the top and side surfaces of the panel. Once this has been done, if the panel 1 is to be encapsulated, the panel is left to set for a short time and then turned over. The same spray-process is applied to the other side of the panel, from the first distance Di from the panel. The side surfaces, edges and corners of the panel are also coated by the spray-processes. Thus, the panel 10 according to the first embodiment is created.
If a roughened surface texture 6 is desired, then once the uniform base coat has been applied as described above in relation to Figure 7, a quick spray is given from a distance D2 from the panel which is greater than a distance Di. By increasing the distance, the drops of the liquid-applied membrane 4 become more sparsely spaced and thus the surface texture 6 comprises droplets of the liquid-applied membrane 4.
While the above applications of the coating were described in terms of spray distances Di, D2, it is envisaged that such effects could also be obtained by other means, for example, by the use of different nozzles 7 and/or different pressures applied to the nozzles 7.
Further, although Figures 7 and 8 show application by spraying, it is envisaged that any form of application of the liquid-applied membrane 4 to coat the panel 1 may take place, for example, painting by hand, dip coating and other methods known to the skilled person.
The panel may be used for thermal insulation in a building or structure.
Such applications could include but are not limited to external-facing surfaces, internal-facing surfaces, walls, roofs or floors of the building or structure.
While the invention has been shown and described with reference to embodiments, those skilled in the art will readily appreciate that changes and/or modifications may be made thereto without departing from the scope of the invention as set out in the claims.

Claims (18)

Claims:
1. A panel for thermal insulation comprising; a vacuum insulated panel; and a coating of liquid-applied membrane on at least one surface of the vacuum insulated panel.
2. A panel as claimed in claim 1, wherein the coating of liquid-applied membrane encapsulates the vacuum insulated panel.
3. A panel as claimed in claim 1 or 2, wherein the coating of liquid-applied membrane has a roughened surface texture.
4. A panel as claimed in claims 1,2 or 3, wherein the liquid-applied membrane is a polyurethane elastomeric membrane.
5. A panel as claimed in any preceding claim, wherein the liquid-applied membrane comprises a formulation comprising two component parts which are combined.
6. A method of forming a panel for thermal insulation comprising: coating at least one surface of a vacuum insulated panel with a liquid- applied membrane.
7. A method as claimed in claim 6, wherein the coating step comprises encapsulating the vacuum insulated panel with the liquid-applied membrane.
8. A method as claimed in claim 6 or 7, wherein the coating step comprises applying the liquid-applied membrane by spraying.
9. A method as claimed in claim 8, wherein liquid to form a base portion of the liquid-applied membrane is sprayed onto the vacuum insulated panel from a first distance therefrom, and liquid to form a roughened surface texture of the liquid-applied membrane is sprayed onto the base portion from a second distance greater than the first distance.
10. A method as claimed in any of claims 6 to 9, wherein the liquid-applied membrane is a polyurethane elastomeric membrane.
11. A method as claimed in any of claims 6 to 10, comprising combining two component parts to make a formulation which is used as the liquid applied to the vacuum insulated panel.
12. A method of using a panel for thermal insulation as claimed in any of claims 1 to 5, or as formed using a method as claimed in any of claims 6 to 11, the method comprising using the panel for thermal insulation in or on a building or structure.
13. A method as claimed in claim 12, comprising using the panel for thermal insulation in or on at least one of: an external-facing surface of the building or structure; an internal-facing surface of the building or structure; a wall or roof of the building or structure; and a floor of the building or structure.
14. A building or structure comprising a panel for thermal insulation as claimed in any of claims 1 to 5, or as formed using a method as claimed in any of claims 6 to 11.
15. A panel for thermal insulation as hereinbefore described with reference to Figures 3 and 4 or Figures 5 and 6 of the accompanying drawings.
16. A method of forming a panel for thermal insulation as hereinbefore described with reference to Figure 7 or Figure 8 of the accompanying drawings.
17. A method of using a panel for thermal insulation as hereinbefore described with reference to Figures 3 and 4 or Figures 5 and 6 of the accompanying drawings.
18. A building or structure comprising a panel for thermal insulation as hereinbefore described with reference to Figures 3 and 4 or Figures 5 and 6 of the accompanying drawings.
GB1605490.0A 2016-03-31 2016-03-31 A method of forming a panel for thermal insulation Active GB2548887B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2050884A2 (en) * 2007-10-16 2009-04-22 Porextherm-Dämmstoffe GmbH Shielded vacuum isolation panel
KR20090066087A (en) * 2007-12-18 2009-06-23 김미경 A vacuum prevention fire of hearlwood for architecture
GB2481693A (en) * 2010-07-02 2012-01-04 Kingspan Holdings Irl Ltd Composite insulation board
WO2015153568A1 (en) * 2014-03-31 2015-10-08 Firestone Building Products Co., LLC Process for encapsulating fragile insulation materials within polyisocyanurate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2050884A2 (en) * 2007-10-16 2009-04-22 Porextherm-Dämmstoffe GmbH Shielded vacuum isolation panel
KR20090066087A (en) * 2007-12-18 2009-06-23 김미경 A vacuum prevention fire of hearlwood for architecture
GB2481693A (en) * 2010-07-02 2012-01-04 Kingspan Holdings Irl Ltd Composite insulation board
WO2015153568A1 (en) * 2014-03-31 2015-10-08 Firestone Building Products Co., LLC Process for encapsulating fragile insulation materials within polyisocyanurate

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