DE202012104182U1 - Rail of multilayer insulating material, web of Dämmverbund, which is formed from such sheets of multi-layer insulation - Google Patents

Abstract

Layer (10) of multi-layer insulation material, which has a main longitudinal direction (L) and a transverse direction (T) and which comprises a corrugated central element (14) made of honeycomb-like material, which is covered with at least a first film (12) which has a metal surface (12b ) opposite the central element (14), wherein the central element (14) has shafts which define lower ridges (14b) and upper ridges (14a), the metal surface (12b) of the first film (12) being joined the lower combs (14b) or the upper combs (14a) of the central element (14) and the waves of the central element (14) with the first film (12) delimit channels (16), characterized in that the profile the waves of the central element (14) correspond to a zigzag cross section and that the lower ridges and the upper ridges form a continuous and rectilinear flat outer surface.

Description

TECHNICAL FIELD OF THE INVENTION

The invention relates to the field of multilayer insulating materials, which are intended in particular, but not exclusively for the thermal insulation of buildings. Such insulation is used for example on the inner surface of the outer walls, as insulation under the roof structure or on the inner walls; but it can also be an insulation on the outer surface of the outer walls (walls, roof structures, etc.) (so-called "sarking" -Verlegung) act.

BACKGROUND OF THE INVENTION

For the purpose of offering a product which has the lowest possible emissivity, considering in particular the reflection of the infrared radiation, as well as a low thermal conductivity, numerous solutions have been proposed which each have advantages but also some disadvantages.

So is from the document WO 2007/118321 discloses the use of a multilayer composite comprising one or more air cushion films in the center of the composite and, in the outer parts, a metal or metallized film.

However, in this type of product, the presence of the air cushion film or films produces a thickness that becomes significant when stacking a large number of layers, and thus significant and permanent space requirements.

DISCLOSURE OF THE INVENTION

The object of the present invention is to offer a product which makes it possible to overcome the disadvantages of the prior art, and in particular a product which satisfies numerous conditions, namely the good thermal insulation properties (in particular a low thermal conductivity), a sufficient mechanical strength, a handling allows to run without danger, to deteriorate its insulating properties, has a small footprint and a high level of lightness.

To that end, according to the present invention, there is provided a sheet of multi-layer insulating material having a major longitudinal direction and a transverse direction and comprising a corrugated central member of honeycomb material bonded to at least a first film having a metal surface opposite the central member wherein the central member has corrugations defining lower crests and upper crests, the metal surface of the first film being bonded to the lower crests or the upper crests of the middle member, and the corrugations of the central member defining channels to the first film. Preferably, the channels are open at one or the other or both ends thereof.

In this way, it is understood that when the channels defined between the corrugations of the central member and the first film are open in at least one place, it is possible to expel the air contained in these channels by compressing the insulating material.

Significantly, the profile of the corrugations of the central element corresponds to a zigzag cross-section and the lower crests and the upper crests define a continuous and rectilinear planar outer surface: it is therefore a profile in the form of chipped saw teeth.

Due to the geometry and materials chosen for the constituents of the insulating material, the latter is elastic, in the sense of being able to substantially resume its initial shape and dimensions after being subjected to a compressive load. This property corresponds to a compressive elasticity.

Thanks to this feature, it is possible to reduce the space requirement of the web-shaped, or web-section-shaped, multilayer insulation material.

Its storage after manufacture and before use and its transport require a space that occupies a space compared to the space occupied by the fabric in its expanded state, as used for its installation or incorporation as a component in a multi-component insulation composite , is reduced. It is a very significant advantage.

This solution also has the additional advantage of further allowing, by virtue of the presence of at least one first film with a metal surface opposite the channels, to obtain a wall of high reflectivity or low emissivity against an air gap, which has an advantage in terms of insulating properties Stoffes represents.

For this purpose, the (or) film (s) having a metal surface has an emissivity ε less than or equal to 0.2.

In addition, the use of a corrugated central element in the expanded state of the insulating material gives a sufficiently rigid Structure to preserve its three-dimensional shape, whether the insulation is flat or upright on its edge.

In general, due to the solution according to the present invention, it is also possible, in a wall-mounted insulating composite comprising the insulating material according to the invention, to control the circulation of the air by the choice of orientation in the central element (or central elements, if multiple tracks of multi-layer insulation material are placed on top of each other) channels to channel. This makes it possible, in particular, to combat the disturbing phenomena of natural convection or to favor air circulation from the bottom to the top in order, for example, to establish an air circulation which resumes the energy penetrating the wall and can participate in the parietaldynamic effect.

In a preferred arrangement, the multilayer insulating material web further comprises a second film such that the corrugated honeycomb core member is located between the first film and the second film, the second film being in correspondence with the other of the upper crests and lower crests of the middle one Element is connected, and that the waves of the central element also define channels with the second film, which are preferably open at least one location and in particular at one or the other or the two ends.

In this case, the number of channels of the multilayer insulating material track and the insulating element resulting from their cutting is doubled.

In this case, it is preferable to choose one, the other, or the following two arrangements:

• The second film has a metal surface facing the middle element and connected thereto,
• The second film has a metal surface facing away from the middle element; this case is particularly used when this second film forms or is destined to form the outer surface of an insulating composite forming a lay-up comprising one or more insulating elements resulting from the cutting of the multilayer insulating material web of the invention.

The present invention also relates to an insulating element resulting from the cutting of a sheet of multilayer insulating material as described above.

Further details and advantages of the invention will become apparent from the following purely exemplary and non-limiting description of an embodiment in conjunction with the drawing:

BRIEF DESCRIPTION OF THE DRAWING

1 is a partial perspective view of a first embodiment of a sheet of multilayer insulating material according to the invention.

2 is an enlarged view of the detail II of the 1 ,

3 and 4 are lateral projection views of a web according to the invention and show the elasticity property of the multilayer insulation material forming this web.

5 and 6 are perspective views showing examples of Dämmverbunden invention, which are formed by the fact that a plurality of insulating elements according to the invention, which are obtained by cutting the web according to the invention, are interconnected.

7A and 7B show variants of the Dämmverbunde the

5 and 6 which have a simpler arrangement.

8A and 8B are partial perspective views illustrating two variants of a second embodiment of a sheet of multilayer insulation material according to the invention.

9 is an enlarged view of detail IX of the 8A or the 8B ,

10 and 11 FIGURES are diagrams comparing the insulation performance of the invention with other prior art products.

DESCRIPTION OF PREFERRED EMBODIMENTS

The train 10 made of multilayer insulating material, which in 1 can be seen, has a width I, and its largest dimension extends in the main longitudinal direction L. This path 10 results from the combination of three components: The lower and upper walls are made of a metallised plastic film 12 between which the middle element 14 forms a nucleus.

More specifically, as in 2 you can see the metallized plastic films 12 from one Plastic layer 12a covered with a metal layer 12b coated, formed.

According to an essential feature of the invention is the metal layer 12b showing the metallized surface of the metallized plastic films 12 forms, the middle element 14 facing.

The illustrated metallized plastic films 12 have only one with a metal layer 12b However, it is possible - without departing from the scope of the present invention - one or two of the metallized plastic films 12 to use, whose two surfaces are metallized, since they are covered with a metal layer 12b are provided and thus form metal surfaces. It is also possible - without departing from the scope of the present invention - a single plastic film 12 to use, instead of the two metallized plastic films 12 a metal surface (metallized film).

Another option is / are the only metallized plastic film 12 or the two metallised plastic films 12 replaced by a solid aluminum film.

The middle element 14 consists of a foil of honeycomb, preferably synthetic material, designed to form undulations having a pitch P and alternating upper crests 14a and lower crests 14b define.

In the illustrated embodiments, those through the middle element 14 formed waves in accordance with a particular shape corrugated longitudinal cross-section, since the profile is zigzag with flattened tips. The flat surface of the crest crest makes it possible to form the zigzag after completing the deformation of the web forming the middle member and even before any connection between the middle member 14 and the movie (s) 12 to preserve.

Moreover, it is provided in a first embodiment of the invention that the waves of the central element 14 either along a direction perpendicular to the main longitudinal direction L direction T (see 1 and 8A ) or along a direction which forms with the main longitudinal direction L an angle deviating from 90 ° and in particular an angle between 75 and 85 ° or between 95 and 115 ° (case not shown).

In a second embodiment of the invention it is provided that the waves of the central element 14 in a direction parallel to the main longitudinal direction L (see 8B ). Thus, the continuous plane surface of the lower crests and the upper crests is parallel to the main direction (L).

Due to the presence of the waves it is understood that the middle element 14 a much larger volume than when it lies flat. Because the waves limit with the two metallized plastic films 12 channels 16 which are open at their ends. The advantageous property also applies in the case where the web 10 or the insulating element 30 , which results from this by cutting, only a single metallized plastic film 12 or only a single solid aluminum film.

The material of the middle element 14 is a so-called honeycomb insulating material with open cells or closed cells.

Preferably, the material is the middle element 14 synthetic, but may also include natural material.

Advantageously, the material of the middle element 14 a foam, preferably polyolefin and preferably polyethylene or polypropylene; It is a honeycomb-like material that has open cells and is therefore permeable to water and air, and also has high flexibility and a certain elasticity.

Alternatively, the material of the middle element 14 a polyurethane foam; it is then a honeycomb-like material, which has closed cells and is therefore impermeable to water and air and which has a high flexibility and a certain elasticity.

Alternatively, the material of the middle element 14 formed by a cotton, in particular a cotton wool of polyester or polyolefin; in this case it is considered that it is also a honeycomb material which has open cells and is consequently permeable to water and air, and which also has high flexibility and elasticity.

Preferably, the cells contain air or other gas that has a lower thermal conductivity than air.

Advantageously, the first movie is 12 (and the possible second film 12 ) a plastic film (in particular of polyethylene) which has a metal surface ( 12b ) having. Preferably, the plastic layer corresponds 12a a polyethylene film having a thickness in the range between 10 μm and 200 μm and preferably between 10 μm and 100 μm and generally between 10 and 40 μm and preferably between 15 and 30 μm, the metal layer 12b is preferably made of aluminum and is preferably the result of a deposition technique (such as a physical or chemical vacuum deposition), the allows to obtain very small thicknesses, in particular a thickness of less than 1 micron.

In a variant not shown, each or a part of the plastic film (s) comprises 12 a reinforcing grid forming a reinforcement made of plastic, in particular of thermoplastic, which, for example, in the plastic layer 12a is embedded. This arrangement is used in particular, so that the plastic reinforcing grid is located at a location which is intended to form an outer surface of the assembly ready end plate forming Dämmverbunds.

In addition, in a further optional option, each or part of the plastic film (s) comprises 12 , on one or both sides thereof, a lacquer layer and / or a pattern which may be superficial (for example imprinted) or raised (for example by mechanical deformation). This arrangement is used in particular a surface which is intended to form an outer surface of the assembly ready end plate forming Dämmverbunds.

Alternatively, for the first movie 12 (and the possible second movie 12 ), as well as in place of the metallized plastic film 12 , a solid metal film such as an aluminum film is used, which then generally has a thickness of the order of 30 microns.

It becomes a middle element 14 used, whose thickness e is between 1 and 5 mm, and preferably equal to 2 mm, 3 mm or 5 mm, in particular when it is formed of a foam material. For the other materials, the thickness e can range from 1 mm to 1 cm.

In addition, it is preferable for the height H of the waves of the middle element 14 , measured between the upper ridges 14a and the lower crests 14b , a value in the range between 10 mm and 50 mm, preferably between 10 mm and 25 mm.

This is the way the insulating material web has 10 according to the present invention, which is only a single corrugated central element 14 includes ( 2 ), as well as each emerging from the web insulating element advantageously a small thickness E, which is a maximum of 300 mm and preferably between 30 mm and 160 mm.

Also, the distance P is the waves of the middle element 14 measured between two upper ridges 14a or between two lower crests 14b , preferably between 15 mm and 100 mm, and preferably between 25 mm and 50 mm, and preferably substantially between 32 and 46 mm.

In order to obtain the desired properties, in particular with regard to elasticity, moreover, the Applicant has determined that it is preferable that the distance P of the corrugations of the middle element 14 between 1 and 6 times and preferably between 1.5 and 2.5 times and advantageously between 1.7 and 2.2 times that between the upper crests 14a and the lower crests 14b measured height H of the waves is.

Advantageously, the material of the middle element 14 a density less than or equal to 50 kg / m ³ and preferably less than 25 kg / m ³ .

Preferably, the outside of the lower combs 14b and the upper ridges 14a a width w greater than the thickness e of the central element 14 forming sheet material; Preferably, the width w is between 1 and 5 mm, preferably less than 4 mm and preferably between 2 and 4 mm.

Thus, the lower crests point 14b and the upper ridges 14a a flattened vertex, because the waves are compressed or capped, which defines a continuous flattening with a width w. In this way, each shaft in cross-section has the shape of a pointed body or a V, alternating with overhead and lower-lying tip, which is the middle element 14 gives the structure of a bellows.

Thanks to the structure just described, the insulating material web 10 According to the present invention as well as any resulting from the web insulation element advantageously a low density.

Because of the structure defined according to the present invention, a density of less than or equal to 15 kg / m ³ , preferably less than or equal to 10 kg / m ³ and preferably of the order of 8 kg / m ³ (8 kg / m ^{3) is obtained.} m ³ with up to 15% more or less).

There are different possibilities, the metallized surface of the two plastic films 12 and the middle element 14 to fasten with each other. Preferably, the connection between the metal surface of the first film 12 (And the metallic or non-metallic surface of the possible second film 12 ) and the middle element 14 made by glue: in 2 is the cross section of glue spots 18 to see that in the place of all upper ridges 14a and all lower ridges 14b of the middle element 14 available.

More specifically, the upper crests 14a and the lower ridges 14b of the middle element 14 all in at least one place with one of the two films 12 connected, and in 2 is this connection through the glue 18 realized.

Alternatively, the glue sites 18 only on a part of the upper ridges 14a and part of the lower crests 14b of the middle element 14 available.

These glue spots 18 may be applied in the form of adhesive lines, continuous or interrupted (dotted lines), continuously or punctually and thereby aligned or not (for example, offset). Other types of compounds, such as ultrasound bonding, are possible.

If you take reference 3 , which is the rolling up of a multilayer insulating material according to the invention 10 shows after getting a compression station 20 has undergone, it will be apparent that the thickness of the web 10 from an initial thickness E0 in the upstream of the compression station 20 located area 21 in the final thickness E1 (below the value E0) passes, thanks to the use of guides 24 holding the track 10 in flat and compressed position, for rolling up in the area of the station 23 is maintained.

There is a variation between 30% and 80%, and generally at least 50%, between the initial thickness E0 and the final gauge E1 of the web 10 firmly, which therefore has a role 26 forms a small footprint.

As in the 3 and 4 you can see the waves of the middle element 14 after passing through the compression station 20 pressed flat and lie one above the other. The channels 16 now have a cross section of very small area compared to the spread state of the web 10 on (thickness E0 or E0 ').

It should be noted that the rolling up (station 23 ) of a train 10 under sufficient tension compressing the web 10 permits; nevertheless, the use of a compression station allows 20 and the guides 24 To ensure a better reproducibility and thus a uniformity of the obtained compression.

4 shows the use of the role 26 in the area of a station 28 that allows the train 10 to roll off: this train 10 then receives naturally (arrows 29 ) Again, a thickness E0 ', which is greater than the thickness E1 and the initial thickness E0 is relatively close. In practice, a deviation of 5% to 30%, and preferably between 10 and 20%, between the thickness E0 'of the web 10 in their propagation after compression and the initial thickness E0 of the web 10 found during their production. It will be noted, however, that E0 'tends to naturally approach E0 over time. Moreover, it is possible to assist this return to the initial thickness E0 or to a value almost equal to the initial thickness E0 by means of a system designed for this purpose in order to shorten this time of return to the initial shape and to the initial volume.

This elasticity property, namely the ability to resume a volume and a thickness after compression, which are very close to the initial values, and even almost equal to the initial values, is an important trump to solve the problem of the space requirement of the insulating material.

From the foregoing it will be understood that the flattening of the web 10 ( 3 ) does not lead to a change in their mechanical strength and / or thermal insulation properties in the latter, when it returns to its original shape; in particular, the middle element becomes 14 through the at the compression station 20 completed compression not damaged.

These are two non-limiting embodiments of a web according to the invention 10 as well as the associated properties that have been found, where the middle element 14 made of polyethylene foam and being two films 12 with an aluminum coated 21 μm polyethylene film can be used:

example 1

• Thickness e of the foam of the middle element 14 : 2 mm,
• Height H of the waves: 13 mm,
• - distance P of the waves: 38 mm,
• - equivalent thermal conductivity: 0.031 W / (m · K);

Example 2

• Thickness e of the foam of the middle element 14 : 2 mm,
• Height H of the waves: 20 mm,
• - distance P of the waves: 38 mm,
• - equivalent thermal conductivity: 0.038 W / (m · K).

From these two examples, it can be seen that reducing the height H of the shafts improves the thermal performance.

In the examples shown, the channels are 16 only filled with ambient air, but it can be considered that these channels 16 in whole or in part with an air-permeable and flexible material, which also compresses and returns to the initial state of the web 10 allows, are filled.

This is how it understands the structure of the railway 10 to find a compromise between parameters, in particular geometrical ones, which are taken into account again in the evaluation of the thermal insulation performances and the mechanical performances, including the elasticity, which are kept at an efficient level.

In addition, the invention provides a web 10 whose thermal conductivity is between 0.025 and 0.065 W / m ° C. and preferably between 0.030 and 0.036 W / m ° C.

• – A: Mineralwolle geringer Dichte (Wärmeleitfähigkeit = 40 m W/K·m)
• – B: Mineralwolle mittlerer Dichte (Wärmeleitfähigkeit = 32 m W/K·m)
• – C: Polystyrol (Wärmeleitfähigkeit = 32–35 m W/K·m)
• – D: Polyurethan (Wärmeleitfähigkeit = 21–23 m W/K·m)
• – Erfindung: Es handelt sich um einen Abschnitt einer erfindungsgemäßen

Moreover, the services of such a railway are interesting in more than one respect, as from the 10 and 11 in which - as follows - the invention was compared with conventional insulation materials:

• - A: Mineral wool of low density (thermal conductivity = 40 m W / K · m)
• - B: mineral wool of medium density (thermal conductivity = 32 m W / K · m)
• - C: polystyrene (thermal conductivity = 32-35 m W / K · m)
• - D: polyurethane (thermal conductivity = 21-23 m W / K · m)
• - Invention: It is a section of an inventive

train 10 where the middle element 14 made of polyethylene foam with a thickness of 2 mm, H = 100 mm, P = 38 mm and the two films 12 aluminum-coated 21 μm polyethylene (thermal conductivity = 34-35 m W / K · m).

In 10 For example, the heat resistance performance of 100 mm thick fabrics is compared, that is, a solid web for materials A, B, C, and D, and one due to waviness of the middle member 14 openwork railway 10 for the invention.

Thus, it can be seen that the product according to the invention has a thermal resistance in the order of 3 m ² .K / W, which is comparable to that of other conventional solid insulating materials such as mineral wool (A and B) or polystyrene (C), but that Invention provides a density that is 2.5 to 4 times lower, that is in the order of 6 to 8 Kg / m ³ , which allows to obtain a product with good insulation performance at a low price due to the small amount of material ,

In 11 It has been found that the thermal resistance achieved with the invention is at least three times better than that of the materials A, B, C and D. The heat resistance of the same materials is shown by inserting two vertical air gaps at the front and back of the product ,

In addition, it has been found that the structure of the invention is a very good soundproofing material.

• – die Mehrlagentechnologie ermöglicht, entweder einen hohen Widerstand (Dichtigkeit) gegen den Wasserdampfdurchgang (geschlossenzelliger Schaumstoff für das mittlere Element 14 und Film 12 vorzugsweise aus Polyethylen niedriger Dichte, metallisiert) oder einen geringen Widerstand gegen den Wasserdampfdurchgang (offenzelliger Schaumstoff für das mittlere Element 14 und Film 12 vorzugsweise aus mikroperforiertem Polyethylen niedriger Dichte) zu verleihen,
• – die Wabenstruktur der Bahn ermöglicht ein Verpacken in Form von Rollen oder starren Platten.

Further advantages result from the structure of the invention:

• - The multi-layer technology allows either a high resistance (tightness) against the water vapor passage (closed-cell foam for the middle element 14 and movie 12 preferably of low density polyethylene, metallized) or low resistance to water vapor transmission (open cell foam for the middle element 14 and movie 12 preferably of microperforated low density polyethylene),
• - The honeycomb structure of the web allows packaging in the form of rolls or rigid plates.

It will now be on the 5 and 6 Reference is made, which represent a first example and a second example of Dämmverbunds, which is made by several by cutting the just described track 10 obtained insulation elements 30 be connected by layering each other.

The Dämmverbunde invention 40 comprise a layer of at least two insulating elements 30 , wherein the superimposed insulating elements 30 over the back, from the middle element 14 is facing away (namely to the outside of one of their plastic films 12 or more generally from her first movie 12 ) are connected to form a one-piece Dämmverbund.

As a preferred type of connection adhesive is used, the pointwise and / or line by line and / or line by line, continuous or interrupted, on at least one of the two opposite surfaces before connecting the insulation elements 30 is applied to each other.

There are other types of connection possible and in particular the heat sealing between the plastic layers 12a when laying the insulation elements 30 opposite each other.

In 5 are all insulation elements 30 the Dämmverbunds 40 arranged such that the directions T of the waves remain parallel to each other. This design forms a Dämmverbund 40 for storage by squeezing in to the surface of the insulating elements 30 or the Dämmverbunds 40 orthogonal direction C and which is capable of at least approximately resuming its initial thickness as soon as the compressive force subsides. To maintain the compressed state during storage, clamping or tensioning elements, such as straps, can be used to secure the composite 40 enclose, are used.

More generally, in an insulating composite comprising n superimposed elements, pairs of insulating elements may be used 30 which maintain this parallelism of the direction T of the waves. In this case, the directions T of the waves of two superimposed insulating elements 30 parallel to an insulation composite 40 to form, in which the waves between two superimposed insulating elements 30 are parallel.

In 6 are all insulation elements 30 the Dämmverbunds 42 arranged such that the directions T of the waves at 90 ° between two superimposed insulating elements 30 cross.

This orientation of the Dämmverbunds 42 gives maximum rigidity, especially in the surface of the insulating elements 30 or the Dämmverbunds 42 orthogonal direction C.

More generally, in an insulating composite comprising n superimposed elements, pairs of insulating elements may be used 30 are used, which maintain this (s) right-angled crosses or position of the direction T of the waves. In this case, the directions T of the waves of two superimposed insulating elements 30 crossed to a Dämmverbund 42 to form, in which the waves between two superimposed insulating elements 30 are crossed.

Alternatively (not shown), the crossing takes place between two superimposed insulating elements 30 not at right angles but at a non-zero angle other than 90 °.

In addition, this makes it possible - be it in this design of the 5 (with parallel waves, that is parallel to each other channels 16 for all the Dämmverbund 40 forming insulating elements 30 ) or in the design of the 6 with the insulation composite 42 - when laying the Dämmverbunds 40 or 42 one or more layers of mutually parallel channels 16 from bottom to top to promote circulation of the air from the bottom to the top in the channel layers, and this in order to realize a desired air circulation in the air gap. In this case, this moving air can make it possible to recapture the energy that penetrates a wall after the parietal dynamic effect.

In the third embodiment, in the 7A and 7B can be seen, have the two superimposed insulating elements 30 if you look through the three superimposed insulating elements 30 considered two pairs, with each pair at two opposite edges 31 and 32 an offset among each other while the other two edges 33 and 34 between all insulation elements of the composite 44 aligned and stay exactly superimposed. Thus, there is a lateral offset d of the two opposite edges 31 and 32 on the one hand between the first insulating element 30 (that in the 7A and 7B the upper insulating element 30 forms) and the second insulating element 30 (that in the 7A and 7B the middle insulating element 30 forms), and on the other hand between the second insulating element 30 (that in the 7A and 7B the middle insulating element 30 forms) and the third insulating element 30 (that in the 7A and 7B the lower insulating element 30 forms).

Thus, in the case of the variant of 7A , in which the offset between two superimposed insulating elements 30 not always in the same direction, but has a change of direction, between the first insulating element 30 (this in 7A the upper insulating element 30 forms) and the third insulating element 30 (this in 7A the lower insulating element 30 forms) a groove 45 in the place of the edge 31 (in 7A right), while at the point of the edge 32 (in 7A left) the second insulating element 30 (this in 7A the middle insulating element 30 forms) a rib 46 limited. This design after 7A allows a connection of the type spring and groove, so-called bung. It is understood that with such a lateral offset, the connection between two connected 44a by the possible nesting of the rib 46 a Dämmverbunds 44a and the groove 45 another next Dämmverbunds arranged 44a is relieved.

In the so-called "offset edge" or "staircase" variant of 7B have the three superimposed insulating elements 30 a lateral offset, which always in the same direction between two superimposed insulating elements 30 , in the area of the opposite edges 31 and 32 lies, so that one steps of a first type 47 on the side of the edges 31 and Steps of a second type 48 on the side of the edges 32 receives. The steps of the first type 47 a first Dämmverbunds 44b (in 7B left) and the steps of the second type 48 a second Dämmverbunds 44b (in 7B right) fit together perfectly through the addition of the mold.

Alternatively, the lateral offset is not only at two opposite edges 31 and 32 but at the four edges 31 . 32 . 33 and 34 wherein two adjacent edges have the same type of offset, that is, a first pair of adjacent edges defines a rib 46 (or stages of a second type 48 ) and a second pair of adjacent edges defines a groove 45 (or stages of a first type 47 ).

In practice, the lateral offset d is at least 1 cm, preferably between 2 and 10 cm and advantageously on the order of 5 cm (5 cm with up to 15% more or less).

In these examples the 5 to 7B there are three insulating elements 30 , which are arranged one above the other, to a Dämmverbund 40 . 42 or 44a ( 44b ), but it is possible to have several of them, ie two or more, and in particular three, four, five or six insulating elements 30 or even more.

In these examples for Dämmverbunde 40 . 42 and 44a ( 44b ), which in the 5 to 7B are shown, form the insulating elements 30 Sections of the railway 10 with the same length L1 as the width I of the web 10 , so insulating elements with square shape. Of course, other dimensions are conceivable, in particular to form Dämmverbunde whose length is twice the width.

These insulation composites 40 . 42 and 44a ( 44b ) can be used as such as an insulating product or can be combined with other components on one or both sides of the composite 40 . 42 or 44a ( 44b ) are arranged.

It will now be on the 8A . 8B and 9 Reference is made to an embodiment of the web 10 of the 1 to 4 group; in this case be in the production of the web 10 ' four identical middle elements 141 . 142 . 143 and 144 and five metallized plastic films 12 , So nine stacking components forming one above the other.

Among these metallized plastic films 12 one distinguishes four metallized plastic films 121 a first type, the only one, opposite one of the four middle elements 141 . 142 . 143 and 144 arranged metal layer 12b have (in 9 to the top), and a single plastic film 122 of a second type, which is arranged in the lamination as an outer film (in 9 above) and the one in the direction of the upper middle element 141 skillful metal layer 12b and a plastic layer 12a ' thicker than the plastic layers of the metallized plastic films 121 of the first type is (for example, 60 microns to 20 microns) and which forms the surface facing the outside of the lamination.

In the 8A . 8B and 9 are the waves of each pair of two adjacent middle elements in the lamination 141 to 145 out of phase: For example, the position of the upper crests 14a (lower crests 14b ) of the middle element 141 not aligned, but towards the position of the upper ridges 14a (lower crests 14b ) of the adjacent middle element 142 added. In the 8A . 8B and 9 this offset is half a distance P, so that the waves of the two adjacent central elements 141 and 142 out of phase.

This way, a train becomes 10 ' formed, the four identical simple tracks 10 (a metallized plastic film 121 of the first type and a corrugated middle element 141 or 142 or 143 or 144 or 145 ), which are arranged one above the other with an offset of half the distance of the sawtooth waves between two adjacent central elements, and a plastic film 122 of the second type.

This train 10 ' has a design in which the combs 14a . 14b (if the train 10 ' horizontally) are vertically aligned in groups of four, alternately with an upper ridge 14a and a lower crest 14b , This arrangement is honeycomb-like and approximates a honeycomb structure giving it good mechanical strength in the direction T of the waves.

By cutting such a web 10 saves you compared to the composite 40 of the 5 a thickness of a metallized plastic film, which reduces the thickness and the cost, without the mechanical performance and thermal insulation performance of the web 10 ' compared to those of the web 10 to worsen.

It also preserves a train 10 ' or an insulating element 30 that of a lamination with several corrugated middle elements 14 , for example, the stratification of 8A or 8B (Train 10 ' ) is formed, the same elasticity property as previously in connection with the 3 and 4 for the train 10 watched and has been described, namely to be able to be compressed in order to reduce their space requirements, and at the same time, after loosening the compression, be able to assume their original dimensions again.

In 8A are the waves of the middle elements 141 to 145 to each other and to the transverse direction T of the web 10 ' parallel.

In 8B are the waves of the middle elements 141 to 145 to each other and to the longitudinal direction L of the web 10 ' parallel.

The deformation of the web of honeycomb material which is flat at the beginning and which after the corrugation is the corrugated central element 14 can be obtained in a variety of ways, warm or cold.

The attachment, in particular by gluing one or two metal films 12b on the upper ridges 14a and / or the lower crests 14b , allows the corrugated shape of the middle element 14 to protect.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• WO 2007/118321 [0003]

Claims (21)

Train ( 10 composite insulating material having a major longitudinal direction (L) and a transverse direction (T) and having a corrugated center element ( 14 honeycomb material comprising at least a first film ( 12 ), which has a metal surface ( 12b ) to the middle element ( 14 ), wherein the middle element ( 14 ) Has waves, the lower crests ( 14b ) and upper crests ( 14a ), the metal surface ( 12b ) of the first film ( 12 ) with the lower crests ( 14b ) or the upper crests ( 14a ) of the middle element ( 14 ) and wherein the waves of the middle element ( 14 ) with the first movie ( 12 ) Channels ( 16 ), characterized in that the profile of the corrugations of the central element ( 14 ) corresponds to a zigzag cross-section and that the lower crests and the upper crests form a continuous and straight flat outer surface. Train ( 10 ) of multilayer insulating material, according to claim 1, characterized in that the distance (P) of the waves of the central element ( 14 ) is between 10 and 100 mm, preferably between 15 and 40 mm and preferably between 25 and 50 mm and preferably between 32 and 46 mm. Train ( 10 ) of multilayer insulating material according to one of the preceding claims, characterized in that the height (H) of the corrugations of the central element ( 14 ), measured between the upper crests and the lower crests, is between 10 and 50 mm, preferably between 10 and 25 mm. Train ( 10 ) of multilayer insulating material according to one of the preceding claims, characterized in that the distance (P) of the corrugations of the middle element ( 14 ) between 1 and 6 times and preferably between 1.5 and 2.5 times that between the upper crests ( 14a ) and the lower crests ( 14b ) measured height (H) of the waves amounts. Train ( 10 ) of multilayer insulating material, according to one of the preceding claims, characterized in that the outside of the lower combs ( 14b ) and the upper crests ( 14a ) has a width w which is greater than the thickness (e) of the middle element ( 14 ) forming sheet material. Train ( 10 multilayer insulating material according to any one of the preceding claims, characterized in that it further comprises a second film ( 12 ), so that the corrugated middle element ( 14 ) of honeycomb material between the first film ( 12 ) and the second film ( 12 ), the second film ( 12 ) with the other of the upper crests ( 14a ) and lower crests ( 14b ) of the middle element ( 14 ) and that the waves of the middle element ( 14 ) with the second film ( 12 ) Channels ( 16 ) limit. Train ( 10 ) of multilayer insulating material according to the preceding claim, characterized in that the second film ( 12 ) a the middle element ( 14 ) and connected to this metal surface ( 12b ) having. Train ( 10 Multilayer insulation material according to one of the preceding claims, characterized in that it has a density of less than or equal to 15 kg / m ³ , preferably less than or equal to 10 kg / m ³ and preferably of the order of 8 kg / m ³ has. Train ( 10 ) of multilayer insulating material according to one of the preceding claims, characterized in that the middle element ( 14 ) is made of a polyolefin material, preferably polyethylene, polypropylene or polyurethane. Train ( 10 ) of multilayer insulating material according to one of the preceding claims, characterized in that the material of the middle element ( 14 ) has a density of less than or equal to 50 kg / m ³ . Train ( 10 multilayer insulating material according to one of the preceding claims, characterized in that the connection between the metal surface of the first film and the middle element ( 14 ) is made by means of adhesive. Train ( 10 Multilayer insulation material according to one of the preceding claims, characterized in that the continuous flat surface of the lower crests and the upper crests is parallel to the main direction (L). Train ( 10 ) of multilayer insulating material according to one of the preceding claims, characterized in that it comprises a single film with a metal surface. Train ( 10 multilayer insulating material according to any one of the preceding claims, characterized in that it further comprises a second film having a metal surface which communicates with the other of the lower combs and the upper combs ( 14a ) of the middle element ( 14 ) connected is. Train ( 10 ) of multilayer insulating material, according to the preceding claim, characterized in that the thermal conductivity between 0.025 and 0.065 W / m · ° C, and preferably between 0.030 and 0.036 W / m · ° C. Track made of composite insulation ( 40 ; 42 ), comprising a lamination of at least two insulation webs ( 30 ) according to one of the preceding claims, wherein the superimposed insulating material webs ( 30 ) one each of the first film ( 12 ) and by a connection between that of the middle element ( 14 ) facing away from the back of the first film ( 12 ) of one of the insulating material webs ( 30 ) and the lower crests ( 14b ) or the upper crests ( 14a ) of the other of the insulating material webs ( 30 ) are interconnected to form a one-piece Dämmverbundbahn, in which the waves of the central element by half a distance in the transverse direction between two superimposed insulation webs ( 30 ) are offset. Insulating element ( 30 ) resulting from the trimming of a web ( 10 ) made of multi-layer insulation material according to one of the preceding claims. Insulation composite ( 40 ; 42 ) comprising a lamination of at least two insulating elements ( 30 ) according to the preceding claim, wherein the superimposed insulating elements ( 30 ) over that of the middle element ( 14 ) facing away from the back of her first film ( 12 ) are connected to form a one-piece Dämmverbund. Insulation composite ( 42 ) according to the preceding claim, characterized in that the directions (T) of the waves of two superimposed insulating elements ( 30 ) are crossed to form an insulation composite ( 42 ), in which the waves between two superimposed insulating elements ( 30 ) are crossed. Insulation composite ( 40 ) according to claim 18, characterized in that the directions (T) of the waves of two superimposed insulating elements ( 30 ) run parallel to a Dämmverbund ( 40 ), in which the waves between two superimposed insulating elements ( 30 ) are parallel. Insulation composite ( 44 ) according to claim 18, 19 or 20, characterized in that the two superimposed insulating elements ( 30 ) have an offset with each other on two opposite edges.

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