DE202018106205U1 - Improved thin insulation system - Google Patents

Abstract

A system for thermal insulation of a building comprising at least two superposed thermal insulation layers (100, 200), each of the thermal insulation layers consisting of two base sheets (110, 120) superimposed and fixedly connected to form pockets (130), wherein each of the pockets (130) comprises synthetic fibers (140),
characterized,
in that it further comprises at least one separating film (150) consisting of two individual sheets, which are in part fixedly connected to each other, so that it has a change of firmly connected sections and not firmly connected sections between the two individual sheets to a plurality of dense cavities (156) to form
wherein the release film (150) is at least partially bonded in contact with a base film of one of the layers (100, 200) such that a plurality of dense voids are formed from a base film (110, 120) of each of the pockets (130) extends and that a plurality of dense cavities between the adjacent layers (100, 200) is arranged.

Description

TECHNICAL FIELD OF THE INVENTION

The present document relates to the field of multilayer insulating materials which are intended in particular but not exclusively for the thermoacoustic insulation of buildings.

BACKGROUND OF THE INVENTION

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

The existing different solutions generally meet several problems, particularly in terms of space, weight, cost and ease of installation, as well as resistance to thermal performance, particularly to air infiltration, which requires encapsulating the traditional fiber insulation with under-roof sealing layers and a vapor barrier.

However, with a view to optimizing the solution to one of these problems, these various solutions commonly result in concessions being made on the other issues. The Applicant has therefore in the previously unpublished patent application FR1654337 proposed a multi-layer insulation material in which the different insulating material layers are separated by air gaps. The insulating material is thus formed by a plurality of separate layers, which are arranged such that they separate between two connecting portions, whereby air layers are formed, which help to improve the insulating properties of the device considerably.

DISCLOSURE OF THE INVENTION

The present document aims to improve such a system by promoting the formation of air gaps and their homogeneity, while simplifying the mounting requirements for the formation of such air gaps.

For this purpose, the present invention proposes a system for thermal insulation of a building comprising at least two superposed thermal insulation layers, each of the thermal insulation layers consisting of two base sheets arranged one above the other and fixedly connected to form pockets, each of which Comprising synthetic fibers, characterized in that it further comprises at least one release film consisting of two partially interconnected individual sheets, so that it has a change of firmly connected sections and not firmly connected sections between the two individual sheets to a plurality of defining dense voids, wherein the release film is at least partially bonded in contact with a base film of one of the layers so that a plurality of dense voids extend from a base film of each of the pockets and that a plurality of dense voids s between the adjacent layers is arranged.

The release film, which is partially firmly bonded in contact with the base film, thus defines a structure which forms a gas separator, the gas being encapsulated in the thus formed bubbles. This structure can be thermoformed.

According to one example, the release film is partially fixedly connected to a base film which forms a layer, the release film being partially firmly connected so as to provide a change of sections which are firmly connected to a film forming a layer, as well as sections, which are not firmly connected to the one layer forming base film has.

The release film may be formed by a single sheet partially bonded to the base sheet of one of the sheets so that the bubbles are formed between this single sheet and this base sheet due to the partial solid bond between them.

According to one example, the release film may consist of two individual foils, which are partially fixedly connected to each other, so that it has a change of firmly connected sections and not firmly connected sections between the two individual foils. In this case, the bubbles are formed between the non-firmly bonded portions, and the resulting "release film" assembly may be partially or totally bonded to the base film.

In general, the fact that the release film is partially firmly bonded means that the blisters are obtained by this partially solid bonding, regardless of whether it is to partially bond the release film to the base film of the layer or to partially bond between them the two individual films, which form the release film acts.

According to one example, each ply has a release film integral with one of the base films forming the ply, the layers being stacked such that a single release film (which is a single film or two single films is inserted) between two adjacent layers.

In one example, the bubbles are filled with a gas of the following gases: air, nitrogen, oxygen, argon, xenon, neon, carbon dioxide.

According to one example, the films which form the layers are firmly joined by sewing, gluing, welding or calendering and are offset from each other or not.

In one example, the synthetic fibers comprise polyester fibers, typically having a fineness number in the range of between 0.2 and 25 denier, more specifically between 0.5 and 15 denier, or more specifically between 3 and 12 denier.

The proposed thermal insulation system also typically includes at least one membrane that forms an envelope on at least one side of the layers. It is thus possible to provide two membranes which form an overall envelope around the layers, or a membrane which covers one side of one of the layers in the manner of a partial envelope, the opposite side of the other layer also acting as a membrane.

Further details and advantages of the invention will become apparent from the following purely exemplary and non-limiting description of embodiments in conjunction with the drawing comprising four drawing figures.

list of figures

• 1 to 4 show several examples of a thermal insulation system according to one aspect of the invention.

DESCRIPTION OF PREFERRED EMBODIMENTS

In all figures, the common elements are provided with the same reference numerals.

The system according to the invention consists of heat insulation layers. 1 schematically shows an example of a layer.

The location 100 , as shown, consists of two superimposed base sheets 110 and 120 ,

These two slides 110 and 120 are firmly connected, so they have pockets 130 form; the firm connection between the two slides 110 and 120 is thus designed so that sections are defined, in the area of which the two films 110 and 120 not firmly connected, these sections are the pockets 130 define.

The firm connection between the two slides 110 and 120 can be made by sewing, gluing, welding or calendering. It may be discontinuous or continuous, in straight-line, curved patterns or any other suitable pattern or pattern, for example in a diamond pattern.

The fixed connection can be made in a longitudinal and / or transverse direction, thereby defining pockets that may be bounded over their entire circumference or part thereof.

In 1 is a central axis in a schematic way X100 the situation 100 shown, with this central axis X100 through the areas for firm connection between the two films 110 and 120 runs. This central axis X100 thus defines a longitudinal direction of the layer 100 ,

The bags 130 have one along this central axis X100 measured maximum dimension, which is between 1 and 60 cm, more precisely between 2 and 20 cm or else between 1 and 10 cm or equal to 5 cm.

This means, therefore, that the areas for firm connection between the two slides 110 and 120 to a maximum value between 1 and 60 cm, more specifically between 1 and 20 cm or between 1 and 10 cm or equal to 5 cm along this central axis X100 are spaced.

Each of these bags 130 includes synthetic fibers 140 in their interior, these synthetic fibers 140 thus at least partially the interior of each of the pockets 130 Completion. The synthetic fibers typically have a three-dimensional crimp; they are commonly referred to as "conjugated" according to the usual English language name. Such synthetic fibers, which have a three-dimensional crimp, allow to promote the swelling, which will be described below. The fibers typically consist of two materials.

The bags 130 may also include other elements or materials that typically allow to improve the thermal conductivity or inertia of the insulation materials.

The fibers 140 inside the bags 130 are arranged, for example, polyester or polyolefin fibers (polyethylene and / or polypropylene) possibly combined with vegetable or animal fibers, for example wood, linen, wool fibers. In the case where the fibers 140 Polyester fibers are, have these fibers 140 typically a fineness number in the range between 0.2 and 25 denier, more specifically between 0.5 and 15 denier or more specifically between 3 and 12 denier.

The synthetic fibers 140 inside the bags 130 may be hollow or solid fibers and may be coated with silicone.

The slides 110 and 120 are typically metallized films based on polyethylene or polypropylene whose emissivity, as measured on the metallized surface according to standard EN 16012, is typically between 0.02 and 0.2, more specifically between 0.05 and 0.07. The metallization consists for example of aluminum.

The location 100 of thermal insulation material typically has a basis weight in the range between 20 and 250 g / cm ² , more specifically between 20 and 110 g / cm ² .

The location 100 made of thermal insulation material typically has a thickness, measured in accordance with the standard EN 823 under application of a pressure of 25 Pa, between 2 and 30 mm.

A release film 150 is with one of the location 100 partly firmly bonded to forming films (in the example shown, the film 120 ).

This release film 150 defined with a gas-filled bubbles, thus resulting from the outside of the film 120 extend out.

The release film 150 is with the foil 120 partially bonded and may also be metallised and have an emissivity, as measured on the metallized surface according to standard EN16012, which is typically in the range between 0.02 and 0.2, more particularly between 0.05 and 0.07. The metallization may consist of aluminum.

One thus distinguishes firmly connected sections 152 that with the foil 120 are firmly connected, for example by gluing, thermoforming, welding or any other suitable means, as well as not firmly connected sections 154 , in turn, with the foil 120 not firmly connected. These firmly connected 152 and not firmly connected 154 Sections alternate, leaving the non-fixed sections 154 of firmly connected, gas-tight sections 152 are framed.

The non-fixed sections 154 typically have a surface area greater than their projection onto the film 120 is such that they define an internal volume filled with a gas and thus bubbles 156 or form dense cavities.

The bubbles 156 are typically filled with air or other inert gas, such as argon, xenon, or carbon dioxide, or their mixture with dinitrogen.

These various gases are particularly advantageous because of their reduced thermal conductivity to air and remain inert at the same time.

Alternatively, one of each of the slides that make up the location 100 consists of partially firmly bonded with a release film, so that gas-filled bubbles on both sides of the pockets 130 the situation 100 be formed.

The isolation system described is typically realized as follows. It will be a slide 120 provided. It will be a release film 150 provided with the foil 120 For example, is partially firmly connected by thermoforming, so that between these two films 120 and 150 Bubbles or dense cavities are formed. The arrangement thus formed may be referred to as a "gas separator". Subsequently, the fibers 140 and the foil 110 provided. The foil 110 Partially with the foil 120 welded to the fibers 140 encapsulating bags 130 to form, creating a location 100 , as described above, is formed.

As in 4 which is a view similar to a part of 2 According to a variant is shown, the release film 150 from two single sheets 150A and 150B which are partially firmly connected to each other to have bubbles or dense voids between these two individual sheets. In other words, this release film can be preformed with bubbles and with the film 120 , partly or not, be firmly connected. In the present case, the film 150 for example thermoformed (the single film 150B is thermoformed and is with the single foil 150A , which, as in the illustrated example, may be flat or also thermoformed, partially firmly connected), and the single film 150A is with the foil 120 partially firmly connected, for example by local welds 150 ' , It would be conceivable, however, that the film 150A with the foil 120 is firmly connected throughout.

An insulation system in one aspect of the invention comprises at least two layers 100 as described above. These layers 100 can be done by welding, sewing, gluing or Calendering or by any other suitable means.

So is in 2 such a system with two layers 100 and 200 shown. 3 is a detailed view of a section III of the 2 which is in 2 is framed. These two layers are typically as described above with reference to FIG 1 described. The reference numerals of the second layer 200 are opposite to those under reference to 1 used reference number increased by 100.

As can be seen from this figure, the two layers 100 and 200 designed so that they are arranged one above the other. They are identical here and are translational along one axis X100 the first location 100 vertical axis arranged symmetrically one above the other.

As can be seen from these figures, the bubbles allow 156 passing through the spacer film 150 are made, ensuring a distance between the pockets 130 and 230 the two layers 100 and 200 ,

Because when the bubbles 156 that between the two layers 100 and 200 are arranged, filled with gas, the latter are a distance between the film 120 the first location 100 and the foil 210 the second location 200 maintained. This distance between the two layers 100 and 200 is thus through the bubbles 156 but also by recessed areas between two consecutive bubbles 156 educated. These recessed areas are filled with air from the environment.

By taking into account this change of bubbles 156 and of recessed areas allows the release film 150 thus, the formation of an air space between the pockets 130 and 230 the two layers 100 and 200 more reliable. Such a gap between the pockets 130 and 230 the two layers 100 and 200 allows to improve the thermal insulation properties of the system. The air gap, so through the succession of bubbles 156 and recessed areas, in fact, assumes an insulating function. The proposed arrangement thus has thermal insulation properties similar to that of a release liner 150 would, are superior.

By way of illustration, the Applicant has made products in which the films 110 and 120 and the fibers 140 existing arrangement has a thermal conductivity between 29 and 36 Wm ^-1 .K ^-1 while passing through the film 120 and the release film 150 and the bubbles thus formed 156 formed arrangement has a thermal conductivity in the order of 28 Wm ^-1 .K ^-1 . In this example, the bubbles are air bubbles and the film is made 150 from two single sheets 150A and 150B , where the single film 150B metallized. The formation of bubbles 156 thus makes it possible to reduce the thermal conductivity of the device to a value close to the thermal conductivity of the air.

The bubbles 156 also allow the formation of the air gap between the layers 100 and 200 more reliable by keeping a minimum distance between the pockets 130 and 230 is ensured by two adjacent layers.

In a variant of in 2 embodiment shown, the two layers 100 and 200 be positioned so that their respective release liners 150 and 250 both between the bags 130 and 230 the two layers 100 and 200 are arranged. With such a design that can be between the pockets 130 and 230 the two layers 100 and 200 significantly increased gas volume formed.

It is understood that the thermal insulation system may comprise any number of superimposed layers, wherein the in the 2 and 3 illustrated example with two layers 100 and 200 not to be understood as limiting. For example, a thermal insulation system may be proposed which comprises 3 or 4 superimposed layers, or more generally any suitable number of layers, to obtain the desired thermal insulating properties as soon as at least one release film is disposed between two successive layers.

The various layers forming the insulation system are typically sandwiched between two membranes which form a wrap around the layers to facilitate handling of the system, or may be covered by a membrane on a single side, with the film comprising: which forms the other side, acts as a membrane on the other side.

The proposed insulation system is typically mounted between two elements, such as rafters. The portions of the insulation system between two successive rafter assemblies thus have an air gap structure thanks to the bubbles formed by the release liner.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• FR 1654337 [0004]

Claims (7)

A system for thermal insulation of a building comprising at least two superposed thermal insulation layers (100, 200), each of the thermal insulation layers consisting of two base sheets (110, 120) superimposed and fixedly connected to form pockets (130), wherein each of the pockets (130) comprises synthetic fibers (140), characterized in that it further comprises at least one release film (150) consisting of two individual sheets which are partially fixedly connected to each other so that they change solid connected sections and non-fixedly connected portions between the two individual sheets to form a plurality of dense cavities (156), wherein the release film (150) at least partially firmly connected in contact with a base film of one of the layers (100, 200) is such that a plurality of dense voids extending from a base film (110, 120) of each of the pockets (130) and that a plurality of dense cavities between the adjacent layers (100, 200) is arranged. Heat insulation system after Claim 1 in which the release film (150) is firmly joined to a film (120) which forms a layer (100), wherein the release film (150) is partially firmly connected so as to provide a change of sections (152) having a film forming a layer, and portions (154) which are not fixedly connected to the sheet forming a film. Heat insulation system according to one of Claims 1 or 2 in which each layer (100, 200) has a release film (150, 250) which is partially fixedly connected to one of the films forming the layer (120, 220), the layers (100, 200) being arranged one above the other in such a way that that a single release film is inserted between two adjacent layers. Heat insulation system according to one of Claims 1 to 3 in which the dense cavities (156) are filled with a gas of the following gases: air, nitrogen, oxygen, argon, xenon, neon, carbon dioxide. Heat insulation system according to one of Claims 1 to 4 in which the foils (110, 120, 210, 220) forming the layers (100, 200) are firmly joined by sewing, welding, gluing, or calendering. Heat insulation system according to one of Claims 1 to 5 in which the synthetic fibers (140) comprise polyester fibers, typically having a fineness number in the range between 0.2 and 25 denier, more specifically between 0.5 and 15 denier, or more specifically between 3 and 12 denier. Heat insulation system according to one of Claims 1 to 6 , further comprising at least one membrane forming a sheath on at least one side of the layers (100, 200).

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