BE1024281A1 - Improved thin insulation system - Google Patents

Abstract

Thermal insulation system of a building, comprising at least two layers (100, 200) of superimposed thermal insulation, each of said layers of thermal insulation being composed of two films (110, 120) superimposed and secured so as to form pockets (130), each of the pockets (130) comprising synthetic fibers (140), said layers (100, 200) of thermal insulation being assembled in disjointed assembly portions (Al, A2) so as to allow the forming cavities of air between the layers (100, 200) of thermal insulation.

Description

(30) Priority data:

05/16/2016 FR 1654337

(71) Applicant (s): ORION FINANCEMENT SOCIETE ANONYME 75755, PARIS CEDEX 15 France (72) Inventor (s):

THIERRY Laurent 09500 MIREPOIX France (54) Improved thin insulation system (57) Thermal insulation system for a building, comprising at least two layers (100, 200) of superimposed thermal insulation, each of said layers of thermal insulation being composed of two films (110, 120) superimposed and secured so as to form pockets (130), each of the pockets (130) comprising synthetic fibers (140), said layers of thermal insulation being assembled according to assembly portions (AI, A2) separated so as to allow the formation of air cavities between the layers (100, 200) of thermal insulation.

FIG.2

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IMPROVED THIN INSULATION SYSTEM

GENERAL TECHNICAL AREA

This presentation concerns the field of multilayer insulating products, intended in particular but not exclusively for thermoacoustic insulation of buildings.

STATE OF THE ART

The thermal insulation of a building is an essential aspect of its energy consumption.

The various existing solutions generally respond to several problems, in particular in terms of space, weight, cost and ease of installation as well as in terms of consistency of thermal performance, in particular with regard to air infiltration. , which requires encapsulating traditional fibrous insulation with under-roof screens and a vapor barrier screen.

However, these various solutions commonly lead, in order to optimize the response to one of these problems, to make concessions on the other problems.

The present invention aims to propose a system for thermal insulation which cumulatively responds to the various problems mentioned above.

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PRESENTATION OF THE INVENTION

To this end, the present invention provides a system for thermal insulation of a building, comprising at least two layers of superimposed thermal insulation, each of said layers of thermal insulation being composed of two superimposed films and joined together so as to form pockets, each of the pockets comprising synthetic fibers, said thermal insulating plies being assembled in disjoint assembly portions so as to allow the formation of air cavities between the thermal insulating plies.

The assembly portions are typically spaced apart by a distance greater than the length of at least three pockets, the length of the pockets being measured along a median axis of the sheet.

The pockets have for example a maximum dimension measured along a median axis of the sheet of between 1 and 60 cm, more precisely between 1 and 20 cm, or even between 1 and 10 cm, or even equal to 5cm.

Each layer of thermal insulation has for example a surface mass of between 20 and 250 g / cm ² , more precisely between 20 and 110 g / cm ² .

The superimposed films of the sheets are for example joined together by sewing, welding or calendering.

The thermal insulating plies are for example assembled so as to allow the formation of air cavities between the thermal insulating plies having a maximum thickness greater than 10 mm or more particularly greater than 20 mm.

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Synthetic fibers include, for example, polyester fibers.

Synthetic fibers have for example a linear mass of between 0.2 and 25 Denier, more precisely between 0.5 and 15 Denier, or more precisely between 3 and 12 Denier.

According to one example, the system further comprises a two membranes forming an envelope around the layers, one of the membranes being supercharged relative to the other membrane.

The invention also relates to an assembly comprising a thermal insulation system as defined above and at least one spacer element, said spacer element being configured so as to engage on a rafter so as to enclose said system of thermal insulation on the rafter.

Said spacer typically has a U shape, and is typically made of plastic or metallic material.

PRESENTATION OF THE FIGURES

Other characteristics, objects and advantages of the invention will emerge from the description which follows, which is purely illustrative and not limiting, and which should be read with reference to the appended drawings, in which:

- Figures 1 to 3 shows several aspects of examples of thermal insulation system according to one aspect of the invention.

- Figures 4 to 7 show several examples of application of thermal insulation systems according to one aspect of the invention.

In all of the figures, the elements in common are identified by identical reference numerals.

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DETAILED DESCRIPTION

FIGS. 1 to 3 present several aspects of examples of a thermal insulation system according to one aspect of the invention.

The system according to the invention is composed of layers of thermal insulator. FIG. 1 schematically represents an example of a sheet.

The sheet 100 as shown is composed of two superimposed films 110 and 120.

These two films 110 and 120 are joined so as to form pockets 130; the joining between the two films 110 and 120 is therefore carried out so as to define portions at the level of which the two films 110 and 120 are not joined, these portions defining the pockets 130.

The joining between the two films 110 and 120 can be carried out by gluing, welding or calendering. It can be carried out discreetly or continuously, and in patterns in straight lines, in curves or according to any other suitable trajectory or pattern.

The joining can be carried out in a longitudinal and / or transverse direction, thus defining pockets which can be delimited on all or part of their periphery.

There is shown diagrammatically in FIG. 1 a median axis X100 of the web 100, this median axis X100 passing through the joining zones between the two films 110 and 120. This median axis X100 thus defines a longitudinal direction of the web 100.

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The pockets 130 have a maximum dimension measured along this median axis X100 of between 1 and 60 cm, more precisely between 1 and 20 cm, or even between 1 and 10 cm, or even equal to 5cm.

This therefore means that the joining zones between the two films 110 and 120 are spaced by a maximum of between 1 and 60 cm, more precisely between 1 and 20 cm, or even between 1 and 10 cm, or even equal to 5cm depending this median axis X100.

Each of the pockets 130 comprises synthetic fibers 140 in its internal volume, these synthetic fibers 140 thus filling at least partially the internal volume of each of the pockets 130. The synthetic fibers typically have a three-dimensional crimp; they are commonly called "conjugated" according to the usual name in English. Such synthetic fibers having a three-dimensional crimp make it possible to promote the proliferation which will be described below. The fibers are typically bi-material.

The pockets 130 may also include other elements or materials typically making it possible to improve the thermal conductivity or the inertia of the insulators.

The fibers 140 disposed within the pockets 130 are for example polyester fibers, optionally combined with vegetable or animal fibers, for example fibers of wood, linen, wool. In the case where the fibers 140 are polyester fibers, these fibers 140 typically have a linear density of between 0.2 and 25 Denier, more precisely between 0.5 and 15 Denier, or more precisely between 3 and 12 Denier

The synthetic fibers 140 disposed within the pockets 130 may be hollow or solid fibers, and may be silicone.

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Films 110 and 120 are typically metallized films based on Polyethylene whose emissivity measured on the metallized face according to standard EN 16012 is typically between 0.02 and 0.12, more precisely between 0.05 and 0.07 .

The thermal insulating ply 100 typically has a surface mass of between 20 and 250 g / cm ² , more precisely between 20 and 110 g / cm ² .

The thermal insulating sheet 100 typically has a thickness of between 2 and 30 mm as measured according to standard EN 823 with the application of a pressure of 25 Pa.

An insulation system according to one aspect of the invention comprises at least two plies 100 as described above.

FIG. 2 thus represents such a system, comprising two plies 100 and 200. These two plies are typically as described above with reference to FIG. 1. The numerical references of the second ply 200 are incremented by 100 relative to the references used with reference to Figure 1.

These two plies 100 and 200 are arranged between two membranes E1 and E2 forming an envelope for the plies 100 and 200, the assembly thus forming the insulation system.

As can be seen in this figure, the two plies 100 and 200 are adapted so as to be assembled according to two disjoint assembly portions, here identified by the references A1 and A2.

The assembly portions can be linear or not. We will consider in the following description that they generally extend according to a

B E2017 / 0054 direction given in order to facilitate understanding, it being understood that such an example is not limiting.

These two assembly portions A1 and A2 are spaced apart by a sufficient distance so as to allow expansion, that is to say an increase in the apparent volume of the system. This expansion results in a spacing of the two plies 100 and 200 between the two assembly portions A1 and A2, thus forming an air cavity between the two plies 100 and 200.

The formation of such an air cavity between the two layers 100 and 200 thus makes it possible to improve the thermal insulation properties of the system, such an air cavity in fact playing an insulating role. The assembly formed by the two plies 100 and 200 as well as the air cavity separating them thus presents thermal insulation properties superior to an assembly composed solely of the two plies 100 and 200 joined against one another.

The air cavity thus formed typically has an average thickness between 1 and 10 mm, and / or maximum thickness greater than 10 mm or more particularly greater than 20 mm.

By average thickness is meant an arithmetic average of the thickness of the air cavity measured between the two assembly portions A1 and A2, in a vertical direction, perpendicular to a longitudinal direction defined by an axis passing through the two portions of assembly Al and A2.

There is thus shown diagrammatically in FIG. 2 an axis X-X designating the longitudinal direction, and an axis Y-Y designating the vertical direction along which the height of the air cavities is measured as well as the different thicknesses.

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By maximum thickness of the air cavity is meant the maximum difference between the two plies 100 and 200 measured in the vertical direction Y-Y between two successive assembly portions A1 and A2.

The two assembly portions A1 and A2 are typically spaced apart by a distance measured along the axis X-X greater than the length of at least three pockets, or typically greater than the length of at least five pockets. The assembly portions A1 and A2 are typically spaced apart by a distance greater than 60 cm, or even greater than 80 cm, or even greater than 100 cm, 120 cm or 150 cm, and less than 200 cm, 180 cm, 160 cm, or 140 cm.

The assembly portions A1 and A2 have a double function; ensure the maintenance of the system and allow an expansion as we will see later.

As can be understood in FIG. 2, during the installation of the system presented for the production of thermal insulation of a building, one of the membranes El or E2 will be disposed towards the outside of the building, while the the other will be placed towards the interior of the building.

The membrane E1 or E2 arranged towards the interior of the building then typically comprises a vapor barrier film, having a high permeability to water vapor (Sd) greater than 18 m, while the other membrane E1 or E2 disposed towards the exterior of the building then typically has a very low permeability to water vapor (Sd), for example less than or equal to 0.25 m

Such properties can be transposed regardless of the number of layers used to form the system.

Such properties thus make it possible to obtain a high resistance to water vapor on the interior side, and a high permeability to water vapor.

B E2017 / 0054 exterior side. These properties therefore make it possible to prevent the diffusion of water vapor through the wall and avoid the installation of a remote vapor barrier, and also avoid the risks of condensation.

The system as proposed thus makes it possible to combine the functions of thermal insulation and of air, water and steam vapor sealing element, thus excluding the risks of condensation.

FIG. 3 shows another embodiment of a system according to one aspect of the invention, comprising three superimposed layers, each layer being typically as described above with reference to the figure

1.

The three layers are here identified by the numerical references 100, 200 and 300, the numerical references of the layers 200 and 300 being incremented by 100 and 200 respectively with respect to the numerical references used for the description of the layer 100 produced previously.

As before, the plies 100, 200 and 300 are assembled according to two disjoint assembly portions, here identified by the references A1 and A2.

The system thus formed abounds between these assembly portions, leading to the formation of air cavities between the layers 100, 200 and 300.

It is understood that the air cavities formed respectively between the plies 100 and 200 and between the plies 200 and 300 are not necessarily identical. Such asymmetry has no impact on the thermal insulation performance of the system, the formation of two air cavities of identical thickness, or of two air cavities of distinct thickness will lead to substantially equal properties as soon as the

BE2017 / 0054 sum of the thicknesses of the air cavities is substantially equal and that each of the air cavities has a maximum thickness of less than 20 mm. More specifically, the position of the intermediate ply, here ply 200, has a limited impact on the thermal insulation properties of the system.

In the case where the system comprises more than two layers, at least one of the air cavities thus formed typically has an average thickness of between 1 and 10 mm, and / or maximum thickness greater than 10 mm or more particularly greater than 20 mm.

Thus, in the example shown in Figure 3, at least one of the air cavities thus formed typically has an average thickness between 1 and 10 mm, and / or maximum thickness greater than 10 mm or more particularly greater than 20 mm .

By average thickness is meant an arithmetic average of the thickness of the air cavity measured between the two assembly portions A1 and A2, in a vertical direction, perpendicular to a longitudinal direction defined by an axis passing through the two portions of assembly Al and A2.

There is thus shown diagrammatically in FIG. 2 an axis X-X designating the longitudinal direction, and an axis Y-Y designating the vertical direction along which the height of the air cavities is measured as well as the different thicknesses.

By maximum thickness of the air cavity is meant the maximum difference between the two plies 100 and 200 measured in the vertical direction Y-Y between two successive assembly portions A1 and A2.

As for the embodiment shown in FIG. 2, the two assembly portions A1 and A2 are typically spaced apart by a

BE2017 / 0054 distance measured according to Tax X-X greater than the length of at least three pockets, or typically greater than the length of at least five pockets. The assembly portions A1 and A2 are typically spaced apart by a distance greater than 60 cm, or even greater than 80 cm, or even greater than 100 cm, 120 cm to 140 cm, 160 cm, 180 cm, 200 cm, or 250 cm, and less than 300 cm.

The insulation system according to one aspect of the invention typically has a thickness of between 15 and 400 mm, or even between 50 and 260 mm as measured according to standard EN 823 with the application of a pressure of 25 Pa.

The insulation system as presented makes it possible to obtain a thermal conductivity of between 29 and 40 mW / m.K.

Figures 4 to 7 show several examples of application of thermal insulation systems according to one aspect of the invention.

FIG. 4 thus represents an example of application of the system as presented above for the insulation of a building roof.

This figure shows a sectional view of a roof provided with a thermal insulation system according to one aspect of the invention.

In this figure, a covering element 1 is thus identified such as tiles 1 forming the roof, support battens 2 forming the support for the tiles, as well as rafters 3 and a finishing facing 4. Battens 5 are interposed between the battens supports 2 and rafters 3.

An insulation system 10 is interposed between the rafters and the battens 5, this insulation system 10 being here as described with reference to the figure

2.

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The bearing portions between the rafters 3 and the battens 5 define mounting portions of the system which are identified by the references Cl and C2, these mounting portions here being distinct from the assembly portions A1 and A2 as shown in figure 2.

The mounting portions C1 and C2 are typically in a direction perpendicular to the direction in which the assembly portions A1 and A2 extend.

The embodiment presented is only illustrative, it is understood that the installation can be carried out with the system oriented in its longitudinal direction or in its transverse direction.

The mounting portions C1 and C2 are typically spaced by a distance of between 400 and 600 mm, corresponding to the spacing of the rafters in the structure considered.

Considering the example shown, the mounting portions C1 and C2 extend in a plane perpendicular to the figure defined by the longitudinal direction of the battens 5 and rafters 3, while the assembly portions extend in a perpendicular direction to the battens 5 and rafters 3 and are therefore not visible in FIG. 4.

According to such an embodiment, the system therefore abounds in two directions; between two successive assembly portions, and between two successive assembly portions, so as to ensure the formation of air cavities between the different layers.

In order to favor the expansion, one of the membranes of the system can be substantially supercharged compared to the membrane system concerned during the manufacturing of the system. Such supercharging makes it possible to define a preferred orientation for the expansion of the sealing system.

If we consider the example shown in Figure 4, the membrane disposed inward, that is to say the membrane closest to the

B E2017 / 0054 support facing 4 (here the membrane E2) is here typically supercharged with respect to the membrane arranged towards the outside (here the membrane El), thus favoring an expansion of the insulation system towards the inside.

FIG. 5 thus represents an example of application of the system as presented above and here presented during its application for the insulation of a building roof.

Two insulation systems 10 and 20 are arranged between the rafters and the battens 5, each insulation system 10 and 20 being as described with reference to FIGS. 1 to 3. These insulation systems 10 and 20 are shown diagrammatically on Figure 5.

More specifically, each insulation system 10 and 20 is composed of at least two layers of superimposed thermal insulator, each of said layers of thermal insulator being composed of two superimposed films and joined together so as to form pockets, each of the pockets comprising 140 synthetic fibers.

As for the embodiment already presented with reference to FIG. 4, the bearing portions between the rafters 3 and the battens 5 define mounting portions of the system which are identified by the references C1 and C2, these portions of mounting here being distinct from the assembly portions A1 and A2 of the insulation systems 10 and 20.

The mounting portions C1 and C2 are typically in a direction perpendicular to the direction in which the assembly portions A1 and A2 extend.

Considering the example shown, the mounting portions C1 and C2 extend along a plane perpendicular to the figure defined by the longitudinal direction of the battens 5 and rafters 3, while the portions

BE2017 / 0054 of assembly extend in a direction perpendicular to the battens 5 and rafters 3 and are therefore not visible in FIG. 5.

According to such an embodiment, the system therefore abounds in two directions; between two successive assembly portions, and between two successive assembly portions, so as to ensure the formation of air cavities between the different layers.

To facilitate the installation of the insulation system and its vapor barrier 20 between rafters (as shown in Figure 5) or the installation of the insulation system and its under-roof screen membrane 10 between rafters (as shown in Figure 6) and guarantee the abundance between chevron insulation systems a spacer 50 is typically used. The spacer 50 as shown has a general shape of U typically having its curved free edges, and allows to partially surround a rafter 3 and one of the insulation systems (here the insulation system 20) . The side walls of the spacer 50 thus ensure the desired position of the insulation system between rafters. The central portion or base of the U is typically reinforce so as to remain substantially flat.

Such mounting of the insulation system 10 or 20 promotes the proliferation of the insulation systems 10 and 20, as well as the formation of air cavities between the different layers of the insulation systems 10 and 20.

Fasteners 60 such as staples or nails can be used to secure the spacer 50 and the insulation system (s) 10 and / or 20 to the rafters 3 and / or the battens 5. The installation between a wooden frame (rafter) of an insulation system or a vapor barrier membrane (with a Sd typically> 18 m) or a membrane under the roof (with a Sd typically <

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0.25 m) using the spacer 50 is simplified compared to a conventional installation requiring a large number of staples or more generally of means for fixing the insulation systems. The spacer 50 is typically made of metal or plastic.

FIG. 6 shows another example of application of the system as presented previously for the insulation of a building roof.

The elements in common with Figures 4 and 5 described above are not described in detail here. Note that the position of the rafters 3 and the battens 5 is reversed; the rafters 3 are here arranged between the support battens 2 and the battens 5, the latter supporting the finishing facing 4.

A first insulation system 10 is here interposed between the rafters 3 and the battens 5, while a second insulation system is interposed between the battens 5 and the finishing facing 4.

Their respective mounting portions are indicated by adding the index 10 or 20 to the references C1 and C2.

As before, one of the insulation systems, here the insulation system 10, is coupled to spacers 50, thus ensuring a spacing between the two insulation systems 10 and 20 so as to promote the formation air cavities between their different layers.

FIG. 7 represents another example of application of the system as presented above for the insulation of a building roof.

This example illustrated in FIG. 7 is a variant of the embodiment shown in FIG. 5, in which counter-rafters 7 are interposed between the rafters 3 and the battens 5.

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The first insulation system 10 is then here arranged between the battens 5 and the counter-rafters 7, while the second insulation system 20 is arranged between the rafters 3 and the counter-rafters 7.

The two insulation systems 10 and 20 are therefore spaced by the counter-rafters 7, the latter being arranged between the two insulation systems 10 and 20. In such a configuration, depending on the dimensions of the counter-rafters 7, it is possible to get rid of spacers 50.

The various examples of use described with reference to FIGS. 4 to 7 illustrate several uses of an insulation system according to one aspect of the invention.

These figures show examples of use comprising two insulation systems identified by the reference numerals 10 and 20.

It is understood that one of these insulation systems can be replaced by another suitable insulation system.

one of these insulation systems can for example be replaced by an insulator as marketed by the company ACTIS under the trade name HYBRIS.

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Claims (10)

1. A thermal insulation system for a building, comprising at least two layers (100, 200) of superimposed thermal insulation, each of said layers of thermal insulation being composed of two films (110, 120) superimposed and joined together so forming pockets (130), each of the pockets (130) comprising synthetic fibers (140), said layers of thermal insulation being assembled according to assembly portions (A1, A2) which are separated so as to allow the formation of air cavities between the layers (100, 200) of thermal insulation. 2. A thermal insulation system according to claim 1, in which the assembly portions (A1, A2) are spaced apart by a distance greater than the length of at least three pockets, the length of the pockets (130) being measured. along a median axis (X100, X200) of the sheet (100, 200). 3. A thermal insulation system according to claim 2, in which the pockets (130) have a maximum dimension measured along a median axis (X100, X200) of the sheet (100, 200) of between 1 and 60 cm, more precisely. between 1 and 20 cm, or between 1 and 10 cm, or even 5cm. 4. A thermal insulation system according to one of claims 1 to 3, in which each sheet (100, 200) of thermal insulator has a surface mass of between 20 and 250 g / cm ² , more precisely between 20 and 110 g / cm ² . 5. A thermal insulation system according to one of claims 1 to 4, in which the films (110, 120, 210, 220) superimposed on the plies (100, 200) are joined together by sewing, welding or calendering. B E2017 / 0054 6. Thermal insulation system according to one of claims 1 to 5, in which the layers of thermal insulation (100, 200) are assembled so as to allow the formation of air cavities between the layers (100, 200 ) thermal insulation having a maximum thickness greater than 10 mm or more particularly greater than 20 mm. 7. Thermal insulation system according to one of claims 1 to 6, in which the synthetic fibers (140) comprise polyester fibers, typically have a linear density of between 0.2 and 25 Denier, more precisely between 0, 5 and 15 Denier, or more precisely between 3 and 12 Denier. 8. Thermal insulation system according to one of claims 1 to 7, further comprising a two membranes (El, E2) forming an envelope around the sheets (100, 200), one of the membranes (El, E2 ) being supercharged compared to the other membrane (E2, El). 9. An assembly comprising a thermal insulation system (10, 20) according to one of claims 1 to 8 and at least one spacer (50), said spacer (50) being configured so as to s 'Engage on a rafter so as to enclose said thermal insulation system on the rafter. 10. The assembly of claim 9, wherein said spacer (50) has a U shape, and is typically made of plastic or metallic material. BE2017 / 0054 BE2017 / 0054 <Λ <Λ B Ε2017 / 0054 τι B Ε2017 / 0054 tt B E2017 / 0054 B E2017 / 0054 Abridged IMPROVED THIN INSULATION SYSTEM 5 Thermal insulation system of a building, comprising at least two layers (100, 200) of superimposed thermal insulation, each of said layers of thermal insulation being composed of two films (110, 120) superimposed and secured so as to forming pockets (130), each of the pockets (130) comprising synthetic fibers (140), Said plies (100, 200) of thermal insulator being assembled according to assembly portions (A1, A2) separated so as to allow the formation of air cavities between the plies (100, 200) of thermal insulator. (Figure 2) FRENCH REPUBLIC will MM · I NATIONAL INSTITUTE INDUSTRIAL PROPERTY