CH691319A5

CH691319A5 - Shaped hard foam component for construction insulation etc has compressed zone(s) at the outer surface from the inner core material shaped by heat and pressure without affecting the cellular structure of the core

Info

Publication number: CH691319A5
Application number: CH172196A
Authority: CH
Inventors: Juerg Vogt; Bernhard Kerns; Hanspeter Hunziker; Hansrudolf Unold
Original assignee: Sarna Patent & Lizenz Ag
Priority date: 1996-07-10
Filing date: 1996-07-10
Publication date: 2001-06-29

Abstract

The shaped body (4), of a hard foam material, has at least one outer zone surface with a higher compression than the core zone. The transit is continuous between the core zone and the compressed zone(s). The core and the compressed zones are formed from a single component workpiece. The compressed zones all have the same or different levels of compression. At least one compressed zone has an embedded reinforcement, with a mechanical and/or chemical anchor. At least one compressed zone is bonded to a flexible or rigid layer. Sections of the surface are profiled. At least one compressed zone is permeable to steam. The core material has a specific gravity which is equal to the specific gravity of the original component workpiece material, and especially 10-100 kg/m<3> and preferably 20-50 kg/m<3>. A significant portion of the compressed zone(s) has a layer thickness of 0.5-5.0 mm and preferably 1-4 mm and especially 1.5-2.5 mm. The shaped component (4) is a gutter or a half-shell or a board, especially with a quadrilateral or rectangular base contour, with the compressed zones at the upper surface. At least one end surface can be profiled. The reinforcement is a woven, knitted or nonwoven material, a band of filaments, a ribbon, grid, netting, or combinations of them. They are especially of plastics and/or glass and/or natural fibers and/or metals. Their surfaces have an adhesive and/or a coating. The bond between the compressed zone(s) and the flexible layer is by lamination, such as to a roof lining, vapor barrier or block, or lamination to a rigid layer such as a plasterboard, cement-bonded chipboard, silicate fiberboard, etc. The shaped profile is a groove, step fold or a combination of a groove and comb together with profile combinations. The steam permeability is through perforations in the compressed zone(s). An Independent claim is included for a shaped body production process, where the thermoplastic hard foam workpiece in the required shape and dimensions is subjected to heat and pressure to give a compression to one or more zones. The blank is cooled, and further compressed into the required dimensions for the final product, and retained until the material of the component (4) has achieved the required natural stability. During the compression and cooling stages, the cell structure is maintained in the core zone. The shaped component is bonded to a flexible or a rigid layer. Preferred Features: The workpiece is fitted with a surface reinforcement before compression by heat and pressure. The compression and cooling stages are continuous, in a double-belt heating/cooling press, where the cooling stage follows the heating stage. The original workpiece component, of expanded polystyrene with a specific gravity of 30 kg/m<3>, is subjected to a pressure of 1 bar and a temperature of 20-50 deg C. In the second stage, the pressure/heat are maintained for 15-60 secs.

Description

       

  
 



  Die vorliegende Erfindung betrifft einen Formteil auf der Basis eines Hartschaumes - gemäss DIN 7726 - aus wenigstens einem thermoplastischen Material gemäss Oberbegriff des Patentanspruches 1. 



  Es wird auch ein Verfahren zur Herstellung dieses Formteiles gemäss Oberbegriff des Patentanspruches 16 und dessen Verwendung gemäss Oberbegriff des Patentanspruches 24 beschrieben. 



  Platten auf der Basis von expandiertem Polystyrol, EPS, beispielsweise Styroporplatten, werden als Wärmedämmmaterial auf Dächern verwendet. 



  Solche Wärmedämmplatten sind bei den gebräuchlichen Dicken von bis zu etwa 140 mm nur dann begehbar, wenn sie auf eine genügend tragfähige Verlegeunterlage, beispielsweise eine Holzschalung, verlegt werden. 



  Wenn diese Wärmedämmplatten direkt auf Sparren, also ohne genügend tragfähige Verlegeunterlage und ohne bezüglich Tragfähigkeit genügende Kaschierung, verlegt werden, dann besteht während des Einbaues in Abhängigkeit des Sparrenabstandes die akute Gefahr des Durchbruchs im Sparrenfeld. 



  Analoges gilt für herkömmliche Platten auf der Basis von Polyurethan-, Aminoplast- und Polyvinylchlorid-Schäumen. 



  Dasselbe gilt auch für herkömmliche Platten auf der Basis von anorganischen und/oder organischen Fa sern, beispielsweise Glasfasern, Steinwolle, Basaltwolle, Blähglimmer, Holz, Baumwolle, Kokos, Cellulose und Ähnliches. 



  Zur Reduktion der akuten Unfallgefahr ist es absolut notwendig, geeignete Massnahmen zu treffen; beispielsweise Aufstellen von Gerüsten, Auffangnetzen, Seilsicherungen von Personen etc. 



  Bei einigen herkömmlichen Wärmedämmmaterialien ist die Oberfläche nicht genügend mechanisch beanspruchbar, beispielsweise Einwirkungen durch Druck und Schlag. 



  Bei einigen herkömmlichen Wärmedämmmaterialien in Form von Platten ist die Festigkeit der Stirnflächen für eine Profilierung ungenügend. 



  Bei weiteren herkömmlichen Wärmedämmplatten muss zur Garantierung einer genügenden Tragfähigkeit der Stoss auf einer Verlegeunterlage, zum Beispiel auf einem Sparren, angeordnet werden. 



  Es ist ein Ziel der vorliegenden Erfindung, die oben genannten Nachteile zu überwinden. 



  Es ist ein weiteres Ziel der vorliegenden Erfindung, ein neues Formteil zur Verfügung zu stellen, welches in einer Konstruktionsebene mit minimaler Dicke eine einstellbare Kombination an Tragfähigkeit und Wärmedämmleistung hat. 



  Dieses Formteil soll auch genügend Widerstand gegen Druck und Schlag haben. 



  Die Tragfähigkeit und die Wärmedämmleistung und der Widerstand gegen Druck und Schlag sollen je nach Anwendung einstellbar sein. 



  Die Profilierung soll wahlweise ausgestaltet werden können. 



  Bezüglich der Tragfähigkeit soll durch entsprechende Profilierung und/oder durch Anbringung eines Verbindungselementes, beispielsweise eine Kombination von Nut und Feder, eine Durchlaufwirkung erzielt werden. 



  Ebenso sollen durch entsprechende Profilierung Wärmebrücken minimiert werden. 



  Das neue Formteil soll am Ort seiner Anwendung, beispielsweise auf der Baustelle, einen einfachen Systemaufbau und eine rationelle Verarbeitung ermöglichen. 



  Das neue Formteil soll wasserabweisend sein. 



  Die Erfindung ist durch die Merkmale in den unabhängigen Ansprüchen gekennzeichnet. 



  Bevorzugte Ausführungsformen sind in den abhängigen Ansprüchen definiert. 



  Das erfindungsgemässe Formteil 4 erfüllt die obigen Ziele. 



  Im folgenden Teil wird eine mögliche Ausführungsform der vorliegenden Erfindung beschrieben. 



  Dabei werden Ausführungsformen, wie sie in den abhängigen Ansprüchen definiert sind, nicht wiederholt. 



  Dieses Formteil wird gemäss dem nachfolgenden Ausführungsbeispiel hergestellt und hat die hierin angegebenen Eigenschaften. 



  Dieses Formteil ist speziell geeignet, um mit einer Kunststoffbahn gemäss CH PS 686 370, eine sogenannte Unterdachbahn, und/oder mit einer Kunststoffbahn, gemäss CH PS 686 371, welche die Wasserdampfdiffusion verhindert oder zumindest wesentlich reduziert, eine sogenannte Wasserdampfsperre, kaschiert zu werden. 



  Dieses Formteil kann als tragfähiges und wärmedämmendes Unterdachelement verwendet werden, beispielsweise im Steildach. 



  Folgender Verlegevorgang ist möglich: 



  Die Formteile werden quer zum Sparrenverlauf von oben auf die Sparren verlegt. 



  Die Länge des Formteiles wird in der Regel so gewählt, dass bezüglich Tragverhalten ein 2- oder 3-Feldträger entsteht. 



  Zwecks Erhöhung der Tragfähigkeit werden die Formteile versetzt angeordnet. 



  Als Verbindungselement, welches in die Nut eingeschoben wird, kann eine HDF Feder mit einem Querschnitt von 4 mm x 20 mm verwendet werden. 



  Das Formteil wird in der Regel durch die Konterlattung und entsprechende Befestiger, wie Nägel, Schrauben, in die Unterkonstruktion, wie Sparren, verankert. 
 
   In den Fig. 1 und 2 werden mögliche Verlegearten von erfindungsgemässen Formteilen gezeigt. 
   In den Fig. 3 bis 8 werden Schnitte durch typische Dachaufbauten gezeigt, bei welchen erfindungsgemässe Formteile verwendet werden. 
 



  Das nachfolgende Beispiel soll die vorliegende Erfindung illustrieren. 


 Beispiel 
 



  Zur Herstellung eines erfindungsgemässen Formteiles nach dem diskontinuierlichen Verfahren wurde wie folgt vorgegangen:
 - Herstellen einer Platte aus expandiertem Polystyrol mit Flammschutz (EPS-Platte) in einem Formteilautomaten mit den Abmessungen von 1895 mm x 645 mm x 120 mm mit einem Raumgewicht von 30 kg/m<3>.
 - Die Heizplatten der Heizpressen wurden beidseitig auf eine Temperatur von 180 DEG C aufgeheizt. Die Platten waren mit einer Antihaftschicht aus Teflon versehen.
 - Auf die EPS-Platte wurde beidseitig eine Glasgewebearmierung gelegt. Die so vorbereitete Platte wurde in die oben genannte Heizpresse eingelegt.
 - Die Presse wurde mit 1 bar Druck zusammengefahren. 
 - Nach 75 Sekunden wurde eine EPS Formteildicke von 70 mm erreicht. Die Heizpresse wurde geöffnet und das EPS-Formteil wurde in die Kühlpresse verschoben.

   In der Kühlpresse wurde das Formteil bei 1 bar Druck und 30 DEG C nachverdichtet, bis das Endmass von 60 mm Dicke erreicht war. Die Platte blieb insgesamt 60 Sekunden in der Kühlpresse. Danach wurde die Presse geöffnet und die Platte wurde entnommen.
 - Die Platte wurde an allen vier Stirnseiten auf das Endmass von 1875 mm x 625 mm bearbeitet. Im gleichen Arbeitsgang wurde eine Nut eingefräst. 



  Das so hergestellte EPS-Formteil hatte folgende Eigenschaften: 
<tb><TABLE> Columns=4 
<tb><SEP>Biegefestigkeit:<SEP>DIN 53423<SEP>N/mm<2><SEP>0.97
<tb><SEP>Druckspannung 
 bei 10% Stauchung:
 <SEP>DIN 53421
 <SEP>N/mm<2>
 <SEP>0.16
<tb><SEP>Wärmeleitfähigkeit (1-Plattengerät):
 <SEP>DIN 52612 T1
 <SEP>W/(m . K)
 <SEP>0.029
<tb><SEP>Brandverhalten:<SEP>VKF 88/94<SEP>BKZ<SEP>5 
<tb></TABLE> 



  Als Vergleich dazu nachfolgend die Messwerte eines unverdichteten Formteiles gleicher Dimension: 
<tb><TABLE> Columns=4 
<tb><SEP>Biegefestigkeit:<SEP>DIN 53423<SEP>N/mm<2><SEP>0.31
<tb><SEP>Druckspannung 
 bei 10% Stauchung:
 <SEP>DIN 53421
 <SEP>N/mm<2>
 <SEP>0.17
<tb><SEP>Wärmeleitfähigkeit (1-Plattengerät):
 <SEP>DIN 52612 T1
 <SEP>W/(m . K)
 <SEP>0.030
<tb><SEP>Brandverhalten:<SEP>VKF 88/94<SEP>BKZ<SEP>5 
<tb></TABLE> 



  Als Vergleich dazu nachfolgend die Messwerte eines unverdichteten Formteiles mit doppelter Dicke;  (Ausgangsformteil) 
<tb><TABLE> Columns=4 
<tb><SEP>Biegefestigkeit:<SEP>DIN 53423<SEP>N/mm<2><SEP>0.26
<tb><SEP>Druckspannung 
 bei 10% Stauchung:
 <SEP>DIN 53421
 <SEP>N/mm<2>
 <SEP>0.18
<tb><SEP>Wärmeleitfähigkeit (1-Plattengerät):
 <SEP>DIN 52612 T1
 <SEP>W/(m . K)
 <SEP>0.030
<tb><SEP>Brandverhalten:<SEP>VKF 88/94<SEP>BKZ<SEP>5 
<tb></TABLE> 



  In den Figuren werden folgende Bezugszeichen verwendet: 
 
   1 Dachlattung 
   2 Konterlattung 
   3 Unterdachbahn, vorzugsweise eine Kunststoffbahn wie sie in der Schweizerischen Patentschrift CH 686 370 A5 definiert ist. 
   4 erfindungsgemässes Formteil 
   5 Wärmedämmung 
   6 Dampfsperre, vorzugsweise eine Kunststoffbahn, welche die Wasserdampfdiffusion verhindert oder zumindest wesentlich reduziert, wie sie in der Schweizerischen Patentschrift CH 686 371 A5 definiert ist. 
   7 Sparren 
   8 Leisten oder Winkel 
   9 Verkleidung 
   10 versetzte Verlegung 
   11 parallele Verlegung 
 



  
 



  The present invention relates to a molded part based on a rigid foam - according to DIN 7726 - made of at least one thermoplastic material according to the preamble of claim 1.



  A method for producing this molded part according to the preamble of claim 16 and its use according to the preamble of claim 24 is also described.



  Sheets based on expanded polystyrene, EPS, such as polystyrene sheets, are used as thermal insulation material on roofs.



  At the usual thicknesses of up to about 140 mm, such thermal insulation boards can only be walked on if they are laid on a sufficiently load-bearing installation underlay, for example wooden formwork.



  If these thermal insulation boards are installed directly on rafters, i.e. without a sufficiently load-bearing installation underlay and without sufficient lamination with regard to load-bearing capacity, there is an acute risk of breakthrough in the rafter field depending on the rafter spacing.



  The same applies to conventional sheets based on polyurethane, aminoplast and polyvinyl chloride foams.



  The same also applies to conventional plates based on inorganic and / or organic fibers, for example glass fibers, rock wool, basalt wool, expanded mica, wood, cotton, coconut, cellulose and the like.



  To reduce the acute risk of accidents, it is absolutely necessary to take suitable measures; e.g. setting up scaffolding, safety nets, rope safety devices for people, etc.



  With some conventional thermal insulation materials, the surface cannot be subjected to sufficient mechanical stress, for example effects from pressure and impact.



  With some conventional thermal insulation materials in the form of panels, the strength of the end faces is insufficient for profiling.



  In the case of other conventional thermal insulation boards, the joint must be arranged on a laying underlay, for example on a rafters, to guarantee a sufficient load-bearing capacity.



  It is an object of the present invention to overcome the above drawbacks.



  It is a further object of the present invention to provide a new molded part which has an adjustable combination of load-bearing capacity and thermal insulation performance in a construction level with minimal thickness.



  This molded part should also have sufficient resistance to pressure and impact.



  The load-bearing capacity and the thermal insulation performance and the resistance to pressure and impact should be adjustable depending on the application.



  The profile should be designed optionally.



  With regard to the load-bearing capacity, a continuous effect is to be achieved by appropriate profiling and / or by attaching a connecting element, for example a combination of tongue and groove.



  Corresponding profiling should also minimize thermal bridges.



  The new molded part should enable a simple system structure and efficient processing at the point of use, for example on the construction site.



  The new molded part should be water-repellent.



  The invention is characterized by the features in the independent claims.



  Preferred embodiments are defined in the dependent claims.



  The molding 4 according to the invention fulfills the above objectives.



  In the following part a possible embodiment of the present invention is described.



  Embodiments as defined in the dependent claims are not repeated here.



  This molded part is produced in accordance with the exemplary embodiment below and has the properties specified here.



  This molded part is particularly suitable for being laminated with a plastic sheet according to CH PS 686 370, a so-called sub-roof sheet, and / or with a plastic sheet, according to CH PS 686 371, which prevents or at least significantly reduces water vapor diffusion, a so-called water vapor barrier.



  This molded part can be used as a load-bearing and heat-insulating sub-roof element, for example in a pitched roof.



  The following laying process is possible:



  The molded parts are laid across the rafters from above across the course of the rafters.



  The length of the molded part is usually chosen so that a 2- or 3-field girder is created with regard to load-bearing behavior.



  To increase the load capacity, the molded parts are staggered.



  An HDF tongue with a cross section of 4 mm x 20 mm can be used as the connecting element, which is inserted into the groove.



  The molded part is usually anchored in the substructure, such as rafters, by means of counter battens and appropriate fasteners such as nails, screws.
 
   1 and 2 show possible ways of laying molded parts according to the invention.
   3 to 8 show sections through typical roof structures in which molded parts according to the invention are used.
 



  The following example is intended to illustrate the present invention.


 example
 



  The procedure for producing a molded part according to the invention by the batch process was as follows:
 - Production of a sheet of expanded polystyrene with flame protection (EPS sheet) in a molding machine with the dimensions of 1895 mm x 645 mm x 120 mm with a density of 30 kg / m <3>.
 - The heating plates of the heating presses were heated on both sides to a temperature of 180 ° C. The plates were covered with a non-stick layer made of Teflon.
 - Glass fabric reinforcement was placed on both sides of the EPS plate. The plate prepared in this way was placed in the above-mentioned heating press.
 - The press was moved together with 1 bar pressure.
 - An EPS molded part thickness of 70 mm was reached after 75 seconds. The heating press was opened and the EPS molded part was moved into the cooling press.

   The molded part was post-compressed in the cooling press at 1 bar pressure and 30 ° C. until the final dimension of 60 mm was reached. The plate stayed in the cooling press for a total of 60 seconds. The press was then opened and the plate was removed.
 - The plate was machined on all four faces to the final dimension of 1875 mm x 625 mm. A groove was milled in the same operation.



  The EPS molded part produced in this way had the following properties:
<tb> <TABLE> Columns = 4
<tb> <SEP> Flexural strength: <SEP> DIN 53423 <SEP> N / mm <2> <SEP> 0.97
<tb> <SEP> compressive stress
 with 10% compression:
 <SEP> DIN 53421
 <SEP> N / mm <2>
 <SEP> 0.16
<tb> <SEP> thermal conductivity (1-plate device):
 <SEP> DIN 52612 T1
 <SEP> W / (m. K)
 <SEP> 0.029
<tb> <SEP> Fire behavior: <SEP> VKF 88/94 <SEP> BKZ <SEP> 5
<tb> </TABLE>



  As a comparison, below the measured values of an uncompressed molded part of the same dimension:
<tb> <TABLE> Columns = 4
<tb> <SEP> Flexural strength: <SEP> DIN 53423 <SEP> N / mm <2> <SEP> 0.31
<tb> <SEP> compressive stress
 with 10% compression:
 <SEP> DIN 53421
 <SEP> N / mm <2>
 <SEP> 0.17
<tb> <SEP> thermal conductivity (1-plate device):
 <SEP> DIN 52612 T1
 <SEP> W / (m. K)
 <SEP> 0.030
<tb> <SEP> Fire behavior: <SEP> VKF 88/94 <SEP> BKZ <SEP> 5
<tb> </TABLE>



  As a comparison, the measured values of an uncompressed molded part with double thickness; (Initial molding)
<tb> <TABLE> Columns = 4
<tb> <SEP> Flexural strength: <SEP> DIN 53423 <SEP> N / mm <2> <SEP> 0.26
<tb> <SEP> compressive stress
 with 10% compression:
 <SEP> DIN 53421
 <SEP> N / mm <2>
 <SEP> 0.18
<tb> <SEP> thermal conductivity (1-plate device):
 <SEP> DIN 52612 T1
 <SEP> W / (m. K)
 <SEP> 0.030
<tb> <SEP> Fire behavior: <SEP> VKF 88/94 <SEP> BKZ <SEP> 5
<tb> </TABLE>



  The following reference symbols are used in the figures:
 
   1 roof battens
   2 counter battens
   3 sub-roof membrane, preferably a plastic membrane as defined in Swiss Patent CH 686 370 A5.
   4 molded part according to the invention
   5 thermal insulation
   6 vapor barrier, preferably a plastic sheet, which prevents or at least significantly reduces water vapor diffusion, as defined in the Swiss patent specification CH 686 371 A5.
   7 rafters
   8 strips or angles
   9 paneling
   10 staggered laying
   11 parallel laying

Claims

1. molded part (4) based on a rigid foam made of at least one thermoplastic material, characterized in that at least one zone of its surface area has a higher degree of compaction than its core zone area, - The transition from said core zone area into the compressed zone or zones is continuous, and - The said core zone area and the compressed zone or zones are made from a single starting molding.

2. Molding according to claim 1, characterized in that in the presence of several compressed zones said degree of compression in the individual compressed zones is the same.

3rd

Shaped part according to claim 1, characterized in that, in the presence of several compressed zones, said degree of compression in the individual compressed zones is different.

4. Shaped part according to one of claims 1 to 3, characterized in that at least one reinforcement is anchored in at least one of the compressed zones by embedding, in particular by a mechanical and / or chemical anchoring.

5. Molding according to one of claims 1 to 4, characterized in that at least one of the compressed zones is connected to a flexible or rigid layer.

6. Molding according to one of claims 1 to 5, characterized in that parts of its surface are profiled.

7. Molding according to one of claims 1 to 6, characterized in that at least one of the compressed zones is designed to be permeable to water vapor.

8th.

Shaped part according to one of claims 1 to 7, characterized in that the density of the core zone area is equal to the density of the starting molding, and in particular a density of 10 kg / m 3 to 100 kg / m 3, preferably 20 kg / m <3> to 50 kg / m <3>.

9. Molding according to one of claims 1 to 8, characterized in that the thermoplastic material is polystyrene, in particular expanded polystyrene, EPS, extruded polystyrene, XPS, expanded polystyrene-polyphenylene ether blend, PS-PPE, polyvinyl chloride, PVC.

10. Shaped part according to one of claims 1 to 9, characterized in that the essential part of the compressed zones has a layer thickness of 0.5 mm to 5 mm, preferably from 1 mm to 4 mm, in particular from 1.5 mm to 2.5 mm, has.

11.

Shaped part according to one of claims 1 to 10, characterized in that the shaped part (4) has the shape of a channel, a half-shell or a plate, in particular with a square or rectangular base area, the base area and the top area being designed as compressed zones, and wherein at least one of the end faces is optionally profiled.

12. Shaped part according to one of claims 4 to 11, characterized in that the reinforcement is a fabric, scrim, knitted fabric, fleece, tape, grid, net or any combination thereof, in particular made of plastic and / or glass and / or natural fibers and / or metals, the surfaces of these materials optionally being equipped with an adhesion promoter and / or a coating.

13.

Shaped part according to one of claims 5 to 12, characterized in that the bond between the compressed zone and the flexible layer, for example a roofing membrane, also called sarking membrane, vapor barrier, vapor barrier, or the rigid layer, for example a gypsum board, cement-bonded particle board, silicate fiber board Lamination is done.

14. Shaped part according to one of claims 6 to 13, characterized in that the profile is formed from groove, step fold or as a combination of groove and comb, including combinations thereof.

15. Molding according to one of claims 7 to 14, characterized in that the water vapor permeability takes place by means of perforation of the compressed zone or zones.

16.

A process for producing the molded part (4) according to one of claims 1 to 15, characterized in that - In a first step, an initial molded part based on a rigid foam made of at least one thermoplastic material with the desired shape and with corresponding oversizes, which are dependent on the desired degree of compression and the postprocessing that may be necessary, while at the same time acting on pressure and heat Zone or precompressed on several zones of its surface area, in a second step, the pre-compacted blank, the pre-compressed zone or zones of which are still plastic and deformable, respectively, are post-compressed with simultaneous cooling and pressure to the desired final dimension, and this final dimension lasts for so long,

until the molded part (4) thus obtained has cooled to a temperature such that the molded part (4) has the necessary inherent stability, the compression in the first and in the second step takes place in such a way that the cell structure of the rigid foam is retained in the core zone area, and if appropriate - In further steps in the order required in each case, the molded part (4) thus obtained is reworked and / or the molded part (4) thus obtained is connected to a flexible or rigid layer.

17. The method according to claim 16, characterized in that in the first step at least one reinforcement is applied / placed on the respectively desired locations before the action of pressure and heat.

18th

Method according to one of claims 16 to 17, characterized in that the first and the second step are carried out continuously in a double-band heating-cooling press.

19. The method according to any one of claims 16 to 17, characterized in that one carries out the first step in a heating press and the second step in an immediately following cooling press.

20. The method according to any one of claims 16 to 19, characterized in that in the first step in a starting molded part made of expanded polystyrene with a density of 30 kg / m 3 a pressure of 1 bar and a temperature in the range of 150 ° C. up to 180 ° C is used.

21. The method according to any one of claims 16 to 20, characterized in that in the first step, the pressure and heat exposure takes place for 30 seconds to 120 seconds.

22.

Method according to one of claims 16 to 21, characterized in that in the second step in a pre-compressed blank made of expanded polystyrene, the core zone area of which has a density of 30 kg / m 3, a pressure of 1 bar and a temperature in the range of 20 ° C to 50 ° C is applied.

23. The method according to any one of claims 16 to 22, characterized in that in the second step, the pressure and heat exposure takes place for 15 seconds to 60 seconds.

24th

Use of the molded part (4) according to one of claims 1 to 15 as - Thermal insulation material, in particular in the roof, wall and facade area, for example pitched roof, flat roof, as well as container, cold room, trade fair and vehicle construction, - thermal insulation material for pipes and containers, - formwork replacement material in concrete construction with thermal insulation capacity, - packaging material, in particular in the form of a technical molded part for the protection of goods and objects, - Thermal insulation and filling material in door and gate construction.