Thermal insulation board for heat insulation of exterior e.g. facade of building, has adhesive-free reflector and cover plates that are joined together in full surface nominal dimension of plate thickness

[0001] The invention concerns a Wärmedämmplatte, in particular a Wärmedämmplatte for the thermal insulation polystyrene (EPS), expanded by external facades, base ranges, walls, covers, roofs or other parts of buildings from, comprehensively a Dämmplatte respectable reflector plate and at least one cover plate.

Dämmplatten from expanded polystyrene for the isolation of building parts are sufficiently well-known among other things. They are manufactured e.g. by expansion by styrene polymer particles in steam chambers and following cut.

For improvement of the insulating efficiency beside thicker plates increasingly also such are made, which contain supplementing particles with dark pigments, e.g. of soot, coloring materials, Grafit among other things the portion of the pigmented styrene polymer particles can 10-90 Gew. - % amounted to, e.g. see. DE-U-20 315,226, whereby a portion of 30 Gew. - % or in particular of 50 Gew. - % of pigmented particles as particularly favourable, respectable only one Dämmplatte with a relationship of 50:50 is regarded is actually manufactured.

Further also Dämmplatten from polystyrene are well-known, the one portion of 0,5-5 Gew. - % (EP-B-0 620,246) or 2-8 Gew. - contain % (EP-B-0 981,574) atherman working additives, whereby a styrene polymer contains 981,574 in accordance with EP-B-0 still additionally a flame protection means, in particular organic bromine connections. In accordance with EP-B-1 815,077 can consist the Dämmplatten also of two EPS parts, a part with predominant insulating efficiency, that of a grey expanded polystyrene exists and athermane materials contains and a second, substantially thinner part from white expanded polystyrene with a further protection characteristic. The athermanen materials can be again soot, Grafit, metallic powder or metallic oxide among other things and function as infrared absorbers and/or - reflectors. The other one, thinner disk part e.g. exhibits a smaller heat conductivity and essentially is, i.e. with a content of maximally 0.5 Gew. - % freely of athermanen materials. The white cover plate is to protect the grey plate against direct sun exposure and resulting deformation and serve at the same time as clamping coat for finery or such a thing.

Both parts are thermally connected, reveal in accordance with puncture metal needles heated up the lying on top of one another parts, thus in the surrounding field of the needles connecting contact areas are formed. The number of contact areas does not correspond to the number of the needles and it develops a continuous connecting surface of the parts. In the EP-A-1 213,118 a procedure for the production of a foam material plate is revealed, which is formed from two output plates. The output plates, which should be extruding strikeless at the contact surfaces, are part-laminar interconnected by means of an diffusion-open adhesive and or by mechanical liaison vehicles. The mechanical liaison vehicles consist thereby preferentially of the material of the output plates.

It is further well-known to arrange a dark reflector plate between two white cover plates (JP-A11 058,576 or JP-A-2003 193,586) or plates from polystyrene with thinner plates from polyurethane foam (EP-A-1201838) to connect. With a similar Dämmplatte in accordance with DE-U-8 the plate consists 226,114, which is used in particular for flat roofs, of a damming bottom layer of expanded polystyrene and a protective layer directed outward of a synthetic material.

In accordance with DE-A-19 914,105 a Wärmedämmplatte can be provided also with a taking off close layer from hollow balls, which are embedded in a support. This layer from hollow balls is to improve the insulation value with same slab thickness substantially.

In the DE-B-10 2005 031,133 a foam material plate is descriptive for thermal insulation, the 10-90 Gew. - % pigmented styrene polymer particles contains, whereby a surface of the foam material plate is at least partially provided with an anti-reflection layer. This anti-reflection layer is a coating material with at least one bonding agent, a Weisspigment and further additives. Admits is also to use in place of a dye film a foil.

The task of the invention consists now of it, a Wärmedämmplatte, in particular for the thermal insulation of external facades, base ranges, under terrain, creating in the flat roof range as well as walls or other parts of buildings completely from expanded polystyrene (EPS) the one Dämmplatte and at least one cover plate respectable.

- Layer covers the different protective functions fulfills, whereby a good adhesion between the layers respectable.

Plates and a good accuracy to size with small expenditure to be reached are.

To be made available a Wärmedämmplatte, which exhibits a protection against heating due to sun exposure, is with insulation value improved at the same time due to athermaner components.

The task is solved with the characteristics of the patent claim 1.

A reflector plate of the Dämmplatte exhibits into well-known way colored, if necessary also white, and dark pigments containing particles, in particular Grafitpartikel, whose portion can vary depending upon requirement.

The cover plate consists athermane of not-white pigmented styrene polymer particles with components, whereby the cover plate is substantially thinner than the Dämmplatte. The cover plate can be outward and inward turned and also when reciprocal allocation the reflector plate amounts to the thickness of the cover plates preferentially maximally 10% of the thickness of the resulting Dämmplatte.

In preferential execution the material of the cover plate is to a large extent yellow, orange or yellow/orange pigmented and contains additionally different colour particles or beads from styrene polymer, which are arranged to a sample or such a thing.

The Wärmedämmplatte is thus a composite slab, formed from a reflector plate and a cover plate from pigmented EPS with athermanen portions, whose Lambdawert prefers smaller 0,030, in particular within the range 0,029 to 0,025 is and those exhibits thus an improved heat damming achievement. This with protection of the Dämmplatte from direct sun exposure, improved at the same time. The cover plate works a damming effect of the cover plate as protection against direct sun exposure, deformation or melts of the EPS of the reflector plate, so that a higher inherent stability is reached, and only in smaller mass.

The cross section can be quaderförmig as also trapezoidal or such a thing. Dämmplatte and cover plate (n) exhibit an oversize, which is eliminated due to melting on and connecting on production of the resulting composite slab as output plates. In such a way manufactured Dämmplatte exhibits then demanded nominal dimension. The Wärmedämmplatte consists thus of at least two plates, i.e. dark and damming Dämmplatte and at least one cover plate with an additional protective function, which are adhesive-free and full-laminar with one another connected.

With reciprocally necessary cover plates similar to an appropriate, second connecting procedure is implemented.

The invention is more near described in the following in a remark example on the basis a design. In the design the only figure shows a Wärmedämmplatte according to invention.

EPS plates are manufactured in well-known way by expansion by styrene polymer particles in steam chambers. Are foamed high-damming Dämmplatten 1, which exhibit pigmented styrene polymer particles.

The cover plates 2 are made of yellow or orange polystyrene and/or are yellow or orange pigmented and contain further atherman working pigments in another color, whereby the total portion atherman of the working pigments or materials substantially more largely 0.5 Gew. - is %. The further atherman working pigments in another color are e.g. black and to a regular sample, e.g. Strip and/or a signature respectable.

Logo arranged.

The cover plate 2 exhibits an initial thickness of approx. 6.5 mm in the example, the Dämmplatte 1 one initial thickness of approx. 158 mm, i.e. two millimeters (of respectively four mm for reciprocal application) above the nominal dimension of the Wärmedämmplatte which can be manufactured.

For the exemplary production of the Wärmedämmplatte in figurativy not represented way a damming slat 1 is horizontal supplied parallel to a machine table on a conveyor of the device to the production of composite slabs. By way of it by means of not represented conveyances or by manual supply by way of a bent chute the substantially thinner cover plates 2 are supplied. These thinner cover plates 2 are flexible, so that they deform from the chute on the evenly supplied Dämmplatte 1 around the curvature of a feed roll Iässt. A heating sword wedge-shaped in the cross section is directly pre-aged to the feed roll in the range of the unification.

The heating sword is oil-heated and is to make an even heating up possible of the contacted surfaces of the plates 1, 2 on approx. 195. The heating sword is e.g. teflon-coated and can consist of an aluminum material or a high-grade steel. For the reciprocal coating the plate is turned or the process runs off with the same structure down and above.

By means of at least a further feed roll the cover plate 2 is pressed against the heating sword.

After the heating sword two feed rolls with the plant represented here, which are successively arranged on same height, follow. On the right of lying feed roll is at the same time Antriebswalze. After the feed rolls, during only one-sided arrangement of a cover plate 2, beabstandet a usual gumption mechanism follows for bringing of discharge cuts into the cover plate 2.

The feed rolls as well as a guide roller are covered of an endlessly rotating and temperature-steady grinding band with rauer surface, which serves the supply of the cover plate 2. The supply of the Dämmplatte 1 to the heating sword can likewise by means of, not represented conveyor, a pneumatic linear feed unit o. A. take place. By means of Walzendruck of the feed rolls and attitude of the work height necessary thickness nominal dimension of the Wärmedämmplatte is reached.

The contacted surfaces of the plates 1, 2 melt on it due to the heating up and a fusionliquid film are trained (“to moisten” by heating up to above the softening temperature), which causes a decrease of the plate thickness at the same time. Under education of the contact area 3 the cover plate 2 is pressed by the feed rolls against the reflector plate 1, whereby due to melting on and following pressing of the plates 1, 2 in slightly the Dämmplatte with a thickness of approx. 160 mm and a Lambdawert originates in smaller to 0,030.

With reciprocally necessary cover plates 2 similar to an appropriate, second connecting procedure is implemented.

During only one-sided arrangement of a cover plate 2 this can be provided with simple, scratching near the surface for tension reduction with respectable due to the connection with the Dämmplatte 1. The depth of the scratching and/or cuts amounts to max. % of the thickness of the cover plate 2.