JP2013047607A - Heat conductive plate formed of expanded graphite and production method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat conductive plate formed of a compressed graphite expansion body, having excellent thermal conductivity parallel to a plate face, and to provide a production method therefor.SOLUTION: In this heat conductive plate, the thermal conductivity parallel to the plate surface is set to be higher than thermal conductivity perpendicular to the plate surface by at least 50%. The heat conductive plate is especially used for transfer of heat of an air conditioner or a heating device planarly disposed in a floor, a wall, a ceiling or the like, and is also used for heat transfer and heat radiation in a building, an automobile, a mechanical facility or a tank. Shape of the heat conductive plate is stabilized without addition of a binder or an additional material, and the heat conductive plate can be produced by a continuous method.

Description

  The present invention relates to a thermal conductive plate without a binder, which is made of expanded graphite and has an excellent thermal conductivity in a direction parallel to the plate surface, and a method for producing the same. The heat conductive plate based on this invention is applied in order to transmit heat in the heating apparatus and air conditioner which were especially arrange | positioned planarly on a floor, a wall, a ceiling, etc. The heat conducting plate according to the present invention can be applied for heat transfer and heat dissipation in automobiles, machinery and equipment, for example, temperature control tanks for storing foodstuffs, in addition to the construction industry field.

  In connection with floor heating, wall heating and ceiling heating, special heat conduction heating layers are used to obtain a comfortable room temperature. In order to improve thermal conductivity, heating layers such as thermal conductive top coat materials and plaster containing additives made of graphite are known in Patent Documents 1 to 5.

Patent Documents 6 to 8 propose the use of a molded body made of expanded graphite for the structure of a heating facility such as floor heating, a silencer, and electromagnetic shielding. The molded body is produced by the following method. That is, the expandable graphite is incompletely expanded in the fluidized bed or already in the final mold under the supply of appropriate heat, and then the temperature is raised in the mold to terminate the expansion.
• Expandable graphite that has been incompletely expanded under the appropriate supply of heat is compressed into a semi-finished product in the mold and subsequently heated to terminate expansion in the mold .
-Wet treatment of expandable graphite in the mold will cause the graphite to expand under the supply of heat.

  That is, in any case, the final stage of expansion is performed in the final mold, and compression is not performed after completion of expansion. The mold must on the one hand be designed so that the mold is sufficiently closed and, on the other hand, air can escape, so that the material has the desired shape. The molded body obtained by this method must be stable in shape and have a uniform density. In an advantageous form of the method described above, various additional materials and auxiliary materials, in particular binders, are added to the expandable graphite. In the above-described manufacturing method, the expansion of the expandable graphite uniformly distributed in the mold occurs in the entire space direction, so the graphite layer plane in the molded body does not have a distinct priority direction. . Therefore, the thermal conductivity of this compact is independent of direction. However, in order to achieve rapid and uniform heat distribution over a plane for use in connection with planarly arranged heating elements such as wall heating, ceiling heating or floor heating, for example, Excellent heat conduction is desired. Another drawback of the prior art described above is that the manufacturing method is discontinuous and the cost of manufacturing a mold that can be evacuated is very high.

German Patent Application Publication No. 19622788 German Patent Application No. 10049230 German Patent Application Publication No. 19802230 German Patent Application Publication No. 195386686 German Patent Application No. 19600228 German Patent Application Publication No. 4117077 German Patent Application No. 4016710 U.S. Pat. No. 3,404,061

  An object of the present invention is to provide a heat conductive plate made of expanded graphite which can eliminate the above-mentioned drawbacks and can be continuously manufactured at low cost, and a method for manufacturing the same.

  The problem with the heat conducting plate is solved by the features of claim 1, and the problem with the manufacturing method is solved by the features of claim 23. Advantageous embodiments of the invention are described in the respective dependent claims.

  According to the present invention, a heat conducting plate is obtained which contains a compressed graphite expansion body (Graphitexpandat) and in which heat conduction takes place in particular along the plate surface. The heat conductive plate according to the present invention is stable in shape without the addition of a binder and additional material. The present invention further provides a method for continuously producing such a heat conducting plate made of expanded graphite.

  The production of expanded graphite (graphite expanded body) is particularly known from US Pat. No. 3,404,061. For the production of expanded graphite, a graphite salt such as hydrogen sulfide graphite or graphite nitride is shockedly heated from the graphite filling compound. At that time, the volume of the graphite particles expands 200 to 400 times, and the total density (bulk material density) decreases to 2 to 20 g / l. The so-called graphite expanded body thus obtained consists of worm-like or accordion-like aggregates.

  When fully expanded graphite is compressed under a directional pressure action, the graphite layer surface is preferentially aligned perpendicular to the pressure action direction, with the individual agglomerates being mutually Get caught. This produces a self-supporting planar shape, such as a sheet or plate, without the addition of a binder. The manufacture and function of the heat conducting plate according to the present invention is based on this effect. In addition, the effect is known by manufacture of the 0.15-3mm-thick graphite film used as a semi-finished product for flat packing manufacture. The heat conductive plate according to the present invention is systematically anisotropic based on the pressure action in which the direction of the expanded graphite body is compressed. Therefore, the heat conductive plate according to the present invention has a predetermined characteristic. With an advantageous anisotropy. In the heat conduction plate according to the present invention, the heat conduction parallel to the plane (that is, in the transverse direction) is superior to the heat conduction perpendicular to the plate plane because of the preferential orientation of the graphite layer plane parallel to the plate plane. ing. Therefore, the heat conducting plate according to the present invention has a known thermal conductivity anisotropy with a graphite film and a good fit to, for example, light weight, high temperature stability, electromagnetic shielding, flame shielding, corrosion resistance and adjacent surfaces. Combined with other properties advantageous for certain applications of expanded graphite.

  Other details, features and advantages of the invention will now be described with reference to the figures and examples.

a to c are cross-sectional views of a heat conducting plate according to the present invention provided with tubes for distributing a heat medium. Sectional drawing of the building material element for an air-conditioning ceiling provided with the heat conductive board based on this invention. The top view of the heat conductive board based on this invention with which the heating spiral was embed | buried.

The heat conducting plate according to the present invention typically has a thickness of 8 to 50 mm. The plate particularly preferably has a thickness of 20 to 40 mm. Typical dimensions for wall, floor and ceiling elements employed in the building industry are between 100x60 cm and 300x100 cm. However, the heat conducting plate according to the present invention is not limited to these dimensions. The length and width can be selected according to the purpose of the intended use because the manufacturing method does not impose a narrow limit. The density of the expanded graphite in the heat conducting plate according to the invention is 0.01-0.5 g / cm ³ , preferably 0.01-0.4 g / cm ³ , in particular 0.05-0.25 g / cm ^3. It is. Thus, the heat conducting plate according to the present invention meets the requirements for a lightweight structural plate for use in the building industry (total density <400 kg / m ³ ).

  The thermal conductivity of the heat conducting plate according to the invention is at least 5.5 W / m · K in the direction parallel to the plate plane and 3.6 W / m · K in the direction perpendicular to the plate plane. That is, the thermal conductivity parallel to the plane is at least 50% greater than the thermal conductivity perpendicular to the plane. The ratio between the thermal conductivity parallel to the plate plane and the vertical thermal conductivity increases as the compression of the expanded graphite becomes stronger, that is, as the density of the heat conduction plate increases. The heat conductive plate based on this invention is employ | adopted for the heating apparatus and electric heating apparatus which utilize a fluid thermal medium, for example. In order to carry a fluid heating medium, for example water, a tube made of a metal such as copper, a plastic such as polypropylene or a net-bonded polyurethane is used. A metal tube is advantageous because of its good heat transfer. The tube 2 is embedded in the heat conducting plate 1, for example, so that the tube 2 is flush with the plate surface (see FIG. 1 a) or partially embedded. That is, a part of the outer peripheral surface of the tube 2 is embedded so as to protrude in a relief shape from the surface of the heat conducting plate 1 (see FIG. 1b). The surrounding space 3 of the tube protruding from the plate surface is filled with an appropriate material, and, for example, a top coating material or pulverized graphite is applied on a cement floor. Moreover, the heating wire of the electric heating device is laid on the plate surface or press-fitted into the plate surface.

  A tube 2 or a heating element may be placed between the two heat conducting plates 1, 1 ′ and the two heat conducting plates 1, 1 ′ may be pressed together (see FIG. 1 c). This composite plate constructed by pressing two heat conductive plates made of expanded graphite together is very stable in shape and will not loosen again at the interface between the plates. In this configuration, a thin plate may be used to obtain a composite plate having a thickness that only slightly exceeds the diameter of the buried tube. In the heat conduction plate according to the present invention, since the thermal conductivity perpendicular to the plate plane is smaller than the parallel heat conductivity, a large distance between the plate surface and the heating element or heating tube embedded in the plate is disadvantageous. . The tubes and heating wires are arranged, for example, in a serpentine shape or a spiral shape so as to distribute heat uniformly over the plate surface. For the same reason, the heating wire of the electric heating device may be arranged in a lattice shape or a meandering shape. However, because of the high thermal conductivity of the heat conducting plate according to the present invention, the heating tube and heating wire have a conventional wall heating device, ceiling heating device and floor on the surface to be heated in order to obtain a uniform heat distribution. It is not necessary to arrange so as to form a dense mesh pattern required in the heating device. That is, it is not necessary to close the meshes, meandering loops or spiral turns (windings), and only a small number of lattices, meandering loops or spiral turns per unit area can be used. As a result, the length of the tube or heating wire can be shortened. Thus, according to the heat conduction plate of the present invention, the required amount of pipe material and heating wire is reduced to 50% compared to wall heating, ceiling heating or floor heating without the heat conduction plate. The pipe or heating wire is embedded in the heat conducting plate according to the present invention directly at the construction site, or a building material element manufactured in advance with the heat conducting plate according to the present invention and the heating wire or heating tube is employed.

  In the simplest embodiment, the heat conducting plate according to the invention consists entirely of expanded graphite. For the function and shape stabilization of the heat conducting plate according to the present invention, no additional materials and auxiliary materials, especially binders, are required. However, by adding metal fibers and / or carbon fibers to the graphite expanded body as a base material, the thermal conductivity and mechanical strength of the plate according to the present invention are increased. Preferably, the length of the fibers is 0.2-5 mm. The mass apportionment amount of these fibers is preferably 5 to 40%.

  In another embodiment of the heat-conducting plate according to the invention, the heat-conducting plate is wholly or partly made of plastic, for example a resin, i.e. in order to increase the strength and hermeticity against mechanical and other environmental effects. Impregnated with thermoplastic resin. Instead, or in addition, it can act on one or more surfaces of the heat transfer plate, either partially or completely, in particular to improve the appearance and ease of handling of the heat transfer plate, to act as a fire barrier or water vapor barrier. Further, a paint, film or coating satisfying predetermined functions such as improvement of heat insulation and sound deadening and reduction of impact sensitivity can be provided.

  Coatings on the heat-conducting plates, such as varnishes and plastic layers, not only improve the appearance and handling, but also take on or support the physical functions of the building. For example, electromagnetic shielding properties can be improved by a metal-containing varnish layer. The reflective varnish layer improves the heat radiation to the adjacent space. This function is also fulfilled with a coating of metal, for example aluminum foil. The thermal barrier coating is made of, for example, expanded polystyrene, polyurethane, glass wool or mineral wool. These may be provided on the surface of the heat conducting plate opposite to the heated room in order to prevent heat loss.

  Suitable materials for coating the heat conducting plate according to the present invention with layers having other functions include fleece, paper, plywood, flat fiber materials (woven fabric, carpet, knit, knitted fabric, etc.), perforated steel plates and plastic films, Metal foil. These layered composites are particularly advantageous because they supplement the physical function of the building in addition to heat conduction (see above) and enhance the mechanical stability of the heat conducting plate. The end face of the heat conducting plate may be coated with a material suitable for improving the appearance and reducing the impact sensitivity, for example, a veneer plate, a plastic sheet plate or a metal sheet plate. For other building industry applications of the heat-conducting plate according to the invention, at least one surface may be provided with a coating that allows partial or complete bonding to other building materials. Suitable coating materials are putty, plaster, topcoat, mortar and concrete.

  The heat conductive plate made of expanded graphite according to the present invention is not limited to a simple flat plate shape. The heat-conducting plate according to the invention can have indentations, grooves or beads, notches, Kordel or rough surfaces, seams and penetrations and other special shaped parts. Furthermore, pins, chevrons, drift pins, hooks, anchors or other connecting elements can be inserted into the heat conducting plate according to the invention. These elements protrude from the plate surface or plate end face and produce an intermeshing and / or frictional connection with adjacent heat conducting plates or other building material elements.

  The heat conducting plate of the present invention can be combined with ordinary building materials to make a complete building material element, for example a lightweight building material element. The element comprises at least one heat-conducting plate according to the invention and at least another building material element such as wood board, gypsum cardboard, brick, pumice, refractory brick, lime sandstone, tile, porous concrete block, concrete board Or it consists of clinker tiles.

  In order to produce the above-mentioned composite comprising a heat conductive plate made of expanded graphite and the above-mentioned layered substance or building material, each of the other components of the heat conductive plate and / or composite is connected to the other material. On the surface to be applied, an adhesive or a medium that causes a composite partner to stick is put on, for example putty, plaster, mortar or another binder. However, the individual composite parts may be engaged with each other by, for example, a key joint or a snap joint such as an elastic hook.

The production of the heat conducting plate according to the present invention can be performed by a continuous method including the following basic steps (i) and (ii). That is, in step (i), the expanded graphite is compressed into a sheet plate having a desired density and thickness with selective additional compression. In some cases, step (ii) is then further processed to produce a coating, shape formation and material composite. Its working is better to intends continuously line relative to the seat plate. However, the cutting of the plate from the sheet plate is necessarily performed discontinuously.

  In the case of a known graphite film production method, expanded graphite particles are guided through a compressor and a roll pair, usually two pairs of rolls, and the graphite expanded body is continuously supplied to the compressor. A heating region for heating the material is disposed between the pair of rolls. The temperature in this region is about 600 ° C. and is used to exclude air from the material during densification. With a compressor and a roll pair, the graphite expanded body is oriented and pressure is applied, and the pressure causes the graphite particles to be oriented parallel to the layer plane. In this way very thin films (thickness 0.15-3 mm) are obtained. Such a thinness is not necessary for the heat conducting plate according to the present invention. From a graphite expanded body with a total density in the range of 2.5 to 5 g / l, sheet sheets are obtained in which the graphite is markedly oriented by compression between the woven belts, ie without further compression in roll pairs. Is clear.

Immediately after leaving the compressor, the sheet plate is subjected to another treatment, for example an impregnation treatment, or coated with another material. In some cases, carbon fiber or metal fiber is added before the graphite expanded body used as a base material is put into the compressor. However, when a plate thickness of only 10-15 mm and / or a high material density (0.5 g / cm ³ ) is required, one and / or two sets of graphite sheet plates coming continuously from the compressor It is important to guide through the roll pairs, in which case heating can also take place between the roll pairs. This compression process is suitable for the purpose and combined with the installation of a covering layer made of other flat materials such as fleece and paper, flat fiber materials (woven fabrics, carpets, knits, knitted fabrics, etc.), plastic films and metal foils. .

  In the next step, which continues continuously or discontinuously, the graphite sheet plate obtained in the continuous compression process with selective additional compression or the plate cut or punched from the sheet plate is made into a desired shape. . This process, generally referred to as additional processing below, includes impregnation, coating, partial deformation and / or compression of the plate / sheet plate in the cold pressing method, forming a square, eg shaping the sheet plate / plate by machining, It includes a wide variety of processing processes, such as the embedment of heating tubes or heating wires, and the manufacture of composite building material elements consisting of heat conducting plates and ordinary building material elements according to the present invention.

  A wide variety of conventional methods are available for impregnation and surface coating treatments. The impregnation treatment can be performed by, for example, an immersion method, a spraying method or a pressure method, a vacuum method or a combination of a vacuum method and a pressure method, and a fluidized bed. Covering here means any treatment in which the surface of the plate according to the invention is covered with a layer made of another material. The material is dissolved or dispersed in a liquid, or exists as a powder as well as a planar layer material. Such a coating is formed, for example, by a painting method, a varnishing method, a spraying method, a laminating method or a winding method, and in these methods, unlike the impregnation method, complete penetration of the inside of the plate according to the present invention does not occur. In a special embodiment of the invention, the building material part is coated with molten resin. This can be done, for example, in a temperature controlled fluidized bed, by extrusion, or by injection molding if allowed by the size of the plate. Heat conductive plate according to the present invention, sheet paperboard, film, steel plate, plywood board, fleece or flat fiber fabric, or semi-finished building materials such as polystyrene board and polyurethane board, glass fiber board, mineral wool board, wood board, gypsum cardboard board Adhesives, bonds on one or both sides to be connected to each other, composites with refractory bricks, bricks, lime sandstone, pumice, tiles, porous concrete blocks or concrete plates, rear pole stones, etc. It is possible to use agents, putty, mortar, and plaster, or to form interlock joints between materials, for example, snap joints such as key joints and elastic hooks.

The graphite sheet plate is once again deformed and compressed, either in a cold compression manner, discontinuously, in pairs with a roll or with a press, either completely or partially. Simultaneously with the compression, the shape is formed with an embossing roll so as to form, for example, a groove, a bead, a notch, a grooved groove or a rough surface. This can be done before and after the covering layer is installed. Suitable methods for producing grooves, joints or penetrations are, for example, cutting, stamping, embossing, milling, turning and shaping. A particularly excellent method of machining is a spray water cutting method. Alternatively, a wear particle beam (sand blast, frozen CO ₂ globules) or a laser beam can be used for the processing.

  In the stage of additional processing, in some cases, functional components such as heat medium distribution pipes and heating wires are also installed. Alternatively, this may be done directly at the construction site. The additional processing is not performed as a roll product in particular, but is performed discontinuously when a film or a composite is manufactured from a material that can only be used as a plate product made of, for example, a steel plate or cardboard, gypsum and wood. Even when the sheet plate obtained immediately after compression does not exist yet, it must be processed by other methods such as coating the end face of the plate that occurs only when the sheet plate is cut into a plate shape. A discontinuous method is needed. Furthermore, the discontinuous additional processing enables spatial and temporal separation of work processes.

[Example 1]
A sheet-like plate having a thickness of 25 mm was produced by continuously compressing a powdery graphite expanded body between two woven belts. A sample having a length of 30 cm and a width of 30 cm was cut out from the plate, and the density was measured. As a result, a value of 0.027 g / cm ³ was obtained. Furthermore, the specific heat conductivity and specific resistance in the x, y and z directions were measured. The results are summarized in Table 1 below.

  Electrical conductivity and thermal conductivity show significant anisotropy. Heat and current transfer occurs parallel to the plate surface, ie along the graphite layer plane.

[Example 2]
A layer composite building material part having an area of 30 × 70 cm was produced. This is shown in FIG. This composite is composed of a hard fiber plate 4 having a thickness of 18 mm, a heat conductive plate 1 having a thickness of 9 mm made of a compressed graphite expanded body, and a perforated steel plate 5 having a thickness of 1 mm. The hard fiber plate 4 on the back side of the heat conductive plate is used for heat insulation, and the front perforated steel plate 5 is used for improving the appearance. The hard fiber board and the heat conductive board are adhered to each other. The perforated steel sheet surrounds the layer composite on its longitudinal side surface and is fixedly held in the longitudinal grooves 6 and 6 ′ existing in the hard fiber board 4. This layer composite is suitable, for example, for constituting an air-conditioned ceiling. A 6 mm diameter plastic tube (hereinafter referred to as a heating spiral) wound in the form of an Archimedean spiral 7 on the surface of the heat conducting plate 1 opposite to the hard fiber plate 4 is flush with the plate surface. Buried in. The diameter of the outermost turn of the spiral was 21 cm. A spiral 7 was placed in the approximate center of the plate 1. That is, the distance between the outermost turn of the spiral 7 and the right edge of the plate is made substantially the same as the distance with the left edge of the plate, and the distance between the outermost turn and the upper edge of the plate is made almost the same as the distance with the lower edge of the plate. did.

  FIG. 3 is a plan view showing the heat conductive plate 1 in which the heating spiral 7 is embedded. For comparison purposes, a layer composite of the same dimensions was produced. The layer composite includes, instead of the heat conductive plate according to the present invention, a gypsum cardboard board in which three heating spirals having the same size as the heating spiral embedded in the graphite plate are embedded side by side. Hot water of 50 ° C. was allowed to flow through the heating spirals of both the test objects. Changes in the temperature distribution on the surfaces of both plates according to the hot water flow-through time were tracked and detected by infrared thermography. At the start of the test, both surfaces had a temperature of 25 ° C. and no temperature gradient across the surface was observed. Table 2 shows the time course of the temperature surrounded by the spiral region of the plate and the surrounding temperature.

  In the test object provided with the heat conductive plate according to the present invention, due to the high lateral thermal conductivity of the expanded graphite, it is the only heating spiral compared to the test sample provided with a normal gypsum plate and three heating spirals. Very rapid heating and uniform temperature distribution was obtained.

  1, 1 'heat conduction plate, 2 pipe for fluid heat medium flow, 3 space filled with paint or crushed graphite material, 4 hard fiber plate, 5 perforated steel plate, 6, 6' longitudinal groove, 7 heating spiral

Claims (32)

A lightweight structural heat conduction plate made of compressed expanded graphite without adhesive, characterized in that the thermal conductivity parallel to the plate surface is at least 50% higher than the thermal conductivity perpendicular to the plate surface A board. The plate according to claim 1, wherein a thermal conductivity parallel to the plate surface is at least 5.5 W / m · K. The plate according to claim 1 or 2, wherein the thickness is 8 to 50 mm, and the density of the plate material is 0.01 to 0.5 g / cm ³ . The plate according to any one of claims 1 to 3 , wherein the thickness is 15 to 40 mm. Plate according to any one of claims 1 to 4, characterized in that the density of the plate material is 0.05~0.25g / cm ^3. Plate according to any one of claims 1 to 5, characterized in that it contains an impregnation agent. 7. A plate according to any one of the preceding claims, characterized in that at least one surface is entirely or partially coated with paint or plastic. 8. At least one surface is entirely or partially covered with a metal foil, a plastic film, a perforated steel plate, a fiber flat shape, a plywood, a fleece or paper . The plate according to any one of the above. At least one surface, entirely or partially, the plate according to any one of claims 1 to 8, characterized in that it is coated with heat insulating material. The heat-insulating layer, expanded polystyrene, polyurethane, a plate of claim 9, wherein the containing glass wool or mineral wool. The board according to any one of claims 1 to 10, wherein at least one surface is entirely or partially covered with putty, plaster, topcoat, mortar or concrete. The plate according to any one of claims 1 to 11, which has a depression, a groove, a bead, a notch, a string, a rough surface, a seam, or a penetration portion. 2. A pin, chevron, drift pin, hook, anchor, or other device for forming a friction or mating joint with another lightweight structural heat conducting plate or another component. The board according to any one of 1 to 12. Lightweight construction thermally conductive plate, a plate according to any one of claims 1, characterized in that it comprises a tube or electrical heating wires for dispensing fluid heat medium body to 13.   The plate according to claim 14, wherein the plate wall is embedded in the plate surface so that the tube wall is flush with the plate surface.   The plate according to claim 14, wherein the pipe is embedded in the plate surface such that a part of the outer peripheral surface of the tube protrudes from the plate surface in a relief shape. In lightweight thermal conductive composite plate constructed in a lightweight construction thermal conductive plate superposed 2 sheets according to any one of claims 1 to 13, a tube for dispensing the fluid heat medium body or electrically heated A composite body characterized in that a conductive wire is embedded between two plates.   15. The lightweight structural heat conductive plate according to claim 14, wherein a heating wire is embedded in the plate surface.   The lightweight structure heat conduction plate according to claim 14, wherein the heating wire is laid on the surface of the plate. 14. At least one lightweight structural heat conductive plate according to any one of claims 1 to 13, wood board, gypsum cardboard board, refractory brick, tile, porous concrete block or concrete board, brick, lime sandstone, pumice stone A composite building material element for use in the construction industry, characterized in that it comprises at least one other component from the group of rear pole stones or clinker tiles.   21. The composite building material element according to claim 20, wherein the composite building material elements are bonded to each other by an adhesive, an adhesion mediator, or a binder.   21. The composite building material element according to claim 20, wherein the building materials are meshed with each other. A building, automobile, mechanical equipment, and container other than using the lightweight structural heat conductive plate or the composite building material element according to any one of claims 1 to 22 for floor heating, ceiling heating , wall heating, or ceiling air conditioning. In use for heat transfer and heat dissipation. The method of manufacturing a lightweight structural thermal conductive plate according to any one of claims 1 to 5, the graphite expanded body that is continuously fed, compressed into the form of a sheet plate between woven belt of the compressor, the sheet A method comprising cutting a plate of a desired size from a plate. The method according to claim 24, wherein the thickness of the sheet plate is 8 to 50 mm, and the density of the sheet plate is 0.01 to 0.5 g / cm ³ . 25. A method according to claim 24, characterized in that the sheet plate obtained with the compressor is subsequently additionally compressed between a pair of rolls, the compression and the additional compression being carried out in a continuous process. 27. The method of claim 26, wherein the additional compression process between the roll pairs is performed in combination with the installation of a coating. The compressed and optionally additionally compressed sheet plate is impregnated and / or coated, and the compression, optionally additional compression, impregnation and / or coating steps are carried out in a continuous process. 28. The method according to any one of 24 to 27. 29. A method according to any one of claims 24 to 28, wherein the sheet plate or a plate cut out therefrom is machined with jet water, a laser beam or an abrasive particle beam and textured. 30. The method according to any one of claims 24 to 29, wherein the sheet plate or a plate cut out therefrom is formed with an embossing roll. The method according to any one of claims 24 to 30, wherein the sheet plate or a plate cut out therefrom is formed by a cold press and compressed. Wherein the surface of the sheet plate or plates cut therefrom, method of any one of claims 24 to 31, characterized in that the buried pipe for dispensing the fluid heat medium body.

Images